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Інструкція Baxi Instruction Baxi 600 System 2 installation manual

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Інструкція · Українська · Оновлено: 11 серпня 2026 р.

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Сторінка 1

These instructions include the Benchmark Commissioning Checklist and should be left with the user for safe keeping.They must be read in conjunction with the Flue Installation Guide. United Kingdom en 600 System 15 - 18 - 24 Installation and Service Manual & Boiler Fiche High-efficiency wall-hung condensing gas boiler

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Dear Customer, Thank you very much for buying this appliance. Please read through the manual carefully before using the product, and keep it in a safe place for later reference. In order to ensure continued safe and efficient operation we recommend that the product is serviced regularly. Our service and customer service organisation can assist with this. We hope you enjoy years of problem-free operation with the product.

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Contents 600 System 2 3 Contents 1 Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 1.2 General safety instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 1.3 Recommendations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 1.5 Liabilities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 1.5.1 Manufacturer's liability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 1.5.2 Installer's liability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10 1.5.3 User's liability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 2 About this manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 2.1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 2.3 Symbols used . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 2.3.1 Symbols used in the manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 3 Technical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 3.1 3.2 Technical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13 3.2.2 Features of the temperature sensors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16 3.3 Dimensions and connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 3.4 Electrical diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 4 Description of the product . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 4.1 General description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19 4.2 Operating principle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 4.2.1 Air-gas adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19 4.2.2 Combustion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 4.2.3 Heating and domestic hot water production . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 4.2.4 Schematic diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 4.3 Main components . ........ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 4.4 Control panel description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 4.4.1 Description of the control panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 4.5 Contents of the package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 4.6 Accessories & options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21 5 Before installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 5.1 Installation standards and rules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 5.2 Installation requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22 5.2.1 Gas supply. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 5.2.2 Electrical supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 5.3 Flow rate/head at the plate characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 2.4 Abbreviations/glossary. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 1.1 Benchmark . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 1.1.1 Building regulations and the benchmark commissioning checklist. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6 1.1.2 The benchmark scheme . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 1.1.3 Installer notification guidelines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 1.4 Specific safety instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 1.4.1 Handling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Homologations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12 3.1.1 Safety, performance & quality . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 3.1.2 Certifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 3.1.3 Gas category . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 3.1.4 Standards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 5.2.3 Hard water area . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23 5.2.4 Bypass . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 5.2.5 System control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 5.2.6 Treatment of water circulating systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 5.2.7 Showers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 5.2.8 Expansion vessel (CH only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 5.2.9 Safety pressure relief valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 3.2.1 Technical information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13 2.2 Additional documentation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

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4 600 System 2 Contents 6.6 Draining the installation . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43 7 Commissioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44 7.1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44 7.2 Checklist before commissioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44 7.3 Commissioning procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44 7.4 Gas settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45 7.4.1 Checking the working gas inlet pressure and gas rate) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45 7.4.2 Combustion parameters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45 7.4.4 Service settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49 7.5 Final instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51 8 Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52 8.1 Use of the control panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52 6 Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .38 6.1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38 6.2 Assembly . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38 6.2.1 Fitting the pressure relief discharge pipe. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38 6.2.2 Connecting the condensate drain . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .39 6.3 Air supply/flue gas connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39 6.3.1 Connecting the flue/chimney . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39 6.4 Electrical connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41 6.5 Filling the installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .43 6.5.1 Flushing the system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43 6.5.2 Filling the installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43 6.5.3 Filling the condensate trap. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43 5.4 Choice of the location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 5.4.1 Location of the boiler . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 5.6.1 Unpacking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36 5.5 Transport . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35 5.4.2 Bath and shower rooms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26 5.4.3 Ventilation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 5.4.4 Condensate drain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 5.4.5 Clearances . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 5.4.6 Flue/chimney location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 5.4.7 Horizontal flue/chimney systems. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31 5.4.8 Flue/chimney trim . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34 5.4.9 Terminal guard . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34 5.4.10 Flue/chimney deflector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34 5.4.11 Flue/chimney accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34 5.6 Unpacking and initial preparation . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .36 5.6.2 Initial preparation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .37 6.4.1 Accessing the electrical connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .41 6.4.2 Connecting the room thermostat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .41 6.4.3 Service connection (SERVICE) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .42 6.4.4 Connecting on wall outdoor sensor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42 6.4.5 Connecting the outside sensor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .42 6.4.6 Identifying label . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42 7.4.5 Adjusting the gas valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50 7.5.1 Handover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51 8.1.1 Browsing the menus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52 8.1.2 Running the automatic detection function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52 8.1.3 Information menu display. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .52 5.4.12 Data plate and boiler service level . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35 5.7.1 Filling information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37 5.7 Connecting diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35 8.1.4 Counter menu display. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .52 7.4.3 LPG conversion procedure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

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600 System 2 5 Contents 12.2 Recommissioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75 13 Disposal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .75 13.1 Disposal and recycling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75 10 Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .61 10.1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61 10.2 Maintenance message . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62 10.2.1 Service notification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62 10.2.3 Resetting the upcoming maintenance message . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63 10.3 Periodic check and maintenance procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .63 10.3.1 Checking the water pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .63 10.3.2 Checking the expansion vessel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63 10.3.3 Checking the flue gas discharge and the air supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64 10.3.4 Checking the combustion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64 10.3.5 Checking the automatic air vent . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64 10.3.6 Cleaning the siphon . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .64 10.3.7 Checking the burner and cleaning the heat exchanger . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65 10.3.8 Electrode distances . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64 10.3.9 10.4 Specific maintenance operations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66 10.4.1 Detection/ignition electrode replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .66 10.4.2 Flow and return sensors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .66 10.4.3 Pressure sensor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .66 10.4.5 Replacing the expansion vessel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68 11 Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70 11.1 Temporary and permanent faults . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70 11.2 Error codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70 12 Decommissioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .75 12.1 Disassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75 10.4.6 Replacing the PCB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68 9 Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55 9.1 Accessing the settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55 9.2 List of parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .55 9.3 Setting the parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56 9.3.1 Setting the heating curve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .56 8.3 Shutdown . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54 8.4 Degassing function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54 8.5 Frost protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54 8.3.1 Switching off the heating and domestic hot water (DHW) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54 9.4 Reading out measured values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57 9.5 Reading counters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .60 10.2.2 Resetting the displayed maintenance message . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62 8.2 Start-up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53 8.2.1 Procedure for first start-up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53 8.2.2 Changing the heating flow temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53 9.2.1 Resetting factory settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .56 10.4.4 Safety pressure relief valve. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67 9.4.1 Statuses and sub-statuses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .58 Annual servicing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .63 Pump. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68 10.4.7 10.4.8 Setting an uncalibrated gas valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69

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1 Safety 1.1 Benchmark 1.1.1 Building Regulations and the Benchmark Commissioning Checklist Building Regulations (England & Wales) require notification of the installa- tion of a heating appliance to the relevant Local Authority Building Control Department. This can be achieved via a Competent Persons Self Certification Scheme as an option to notifying the Local Authority directly. The Health & Safety Executive operates the ’Gas Safe Register’, a self certification scheme for gas heating appliances. This company is a member of the Benchmark initiative and fully supports the aims of the programme. Its aim is to improve the standards of installa- tion and commissioning of central heating systems in the UK and to en- courage the regular servicing of all central heating systems to ensure safety and efficiency. Building Regulations require that installations should comply with manu- facturer’s instructions. It is therefore important that the commissioning checklist is completed by the installer. The relevant section of Building Regulations only relates to dwellings. Therefore the checklist only applies if the appliance is being installed in a dwelling or some related structure. The flowchart in 1.1.3 gives guidance for installers on the process neces- sary to ensure compliance with Building Regulations. 1.1.2 The Benchmark Scheme Benchmark places responsibilities on both manufacturers and installers. The purpose is to ensure that customers are provided with the correct equipment for their needs, that it is installed, commissioned and serviced in accordance with the manufacturer’s instructions by competent persons and that it meets the requirements of the appropriate Building Regulations. The Benchmark Checklist can be used to demonstrate compliance with Building Regulations and should be provided to the customer for future ref erence. Installers are required to carry out installation, commissioning and servic ing work in accordance with the Benchmark Code of Practice which is available from the Heating and Hotwater Industry Council who manage and promote the Scheme. Visit www.centralheating.co.uk for more infor mation. Fig.1 Benchmark AD-3000725-01 1 Safety 6 600 System 2

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1.1.3 Installer Notification Guidelines Fig.2 Installer Notification Guidelines Choose Building Regulations Notification Route Contact your relevant Local Authority Building Control (LABC) who will arrange an inspection or contact a government approved inspector LABC will record the data and will issue a certificate of compliance ‘Gas Safe Register’ will issue a Building Regulations Compliance Certificate to the property owner and inform the relevant LABC You must ensure that the certificate number issued by the ‘Gas Safe Register’ is written onto the Benchmark Checklist Scheme Members only Call ‘Gas Safe Register’ on: 0800 408 5577 or log onto: www.gassaferegister.co.uk within 10 days If you notify via the ‘Gas Safe Register’, the register will issue the Building Regulations certificate on members’ behalf Complete the Benchmark Checklist Install and Commission this appliance to manufacturer's instructions Competent Person's Self Certification Scheme Building Control Complete the Benchmark Checklist Install and Commission this appliance to manufacturer's instructions 1 Safety 600 System 2 7

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1.2 General safety instructions Danger This boiler can be used by children aged 8 years and above and by persons with reduced physical, sensory or mental capabilities or lack of experience and knowledge when they have been given supervision or instruction concerning the safe use of the device and understand the resulting risks. Children must not be allowed to play with the appliance. Cleaning and user maintenance must not be carried out by children without supervision. Danger If you smell gas: 1. Do not use a naked flame, do not smoke, do not operate elec trical contacts or switches (doorbell, light, motor, lift, etc.). 2. Shut off gas supply. 3. Open the windows. 4. Trace possible leaks and seal them immediately. 5. If the gas leak is before the gas meter, contact the supplier 6. Telephone the National Gas Emergency Service on:- 0800 111 999. Danger If you smell flue gases: 1. Switch off the boiler. 2. Open the windows. 3. Trace possible leaks and seal them immediately. Warning Do not touch the flue gas pipes. Depending on the boiler settings, the temperature of the flue gas pipes may exceed 60 oC. Warning Do not touch the radiators for long periods. Depending on the boil- er settings, the temperature of the radiators may exceed 60 oC. Warning Take precautions with the domestic hot water. Depending on the boiler settings, the domestic hot water temperature may exceed 65 oC. Danger Before any work, switch off the mains supply to the boiler. Caution After maintenance or repair work, check the entire heating installa tion to ensure that there are no leaks. 1.3 Recommendations Warning Installation and maintenance of the boiler must be carried out by a qualified installer in accordance with local and national regula tions. Warning If the mains lead is damaged, it must be replaced by the original manufacturer, the manufacturer's dealer or another suitably skilled person to prevent hazardous situations from arising. Warning Always disconnect the mains supply and close the main gas tap when working on the boiler. 1 Safety 8 600 System 2

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Caution Make sure the boiler can be reached at all times. The boiler must be installed in a frost-free area. In the case of a fixed connection to the power cord, you must al ways install a main double pole switch with an opening gap of at least 3 mm (EN 60335-1). Drain the boiler and central heating system if you are not going to use your home for a long time and there is a chance of frost. The frost protection does not work if the boiler is out of opera tion. The boiler protection only protects the boiler, not the system. Check the water pressure in the system regularly. If the water pressure is lower than 0.8 bar, the system must be topped up (recommended water pressure between 1 and 2 bar). Important Keep this document near to the boiler. Important Casing panels may only be removed for maintenance and servic ing purposes. Refit all panels when maintenance work and servic ing are complete. Note Instruction and warning labels must never be removed or covered and must be clearly legible throughout the entire service life of the boiler. Replace damaged or illegible instruction and warning labels immediately. Note The boiler must not be modified in any way. 1.4 Specific safety instructions 1.4.1 Handling General The following advice should be adhered to, from when first handling the boiler to the final stages of installation, and also during maintenance. Most injuries as a result of inappropriate handling and lifting are to the back, but all other parts of the body are vulnerable, particularly should- ers, arms and hands. Health & Safety is the responsibility of EVERY- ONE. There is no "safe" limit for one person - each person has different capabilities. The boiler should be handled and lifted by TWO PEOPLE. Do not handle or lift unless you feel physically able. Wear appropriate Personal Protection Equipment e.g. protective gloves, safety footwear etc. Preparation Co-ordinate movements - know where, and when, you are both going. Minimise the number of times needed to move the boiler - plan ahead. Always ensure when handling or lifting the route is clear and unobstruc ted. If possible avoid steps, wet or slippery surfaces, unlit areas etc. and take special care on ladders/into lofts. Technique When handling or lifting always use safe techniques - keep your back straight, bend your knees. Don’t twist - move your feet, avoid bending forwards and sideways and keep the load as close to your body as pos sible. Where possible transport the boiler using a sack truck or other suitable trolley. 1 Safety System 2 9

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Always grip the boiler firmly, and before lifting feel where the weight is concentrated to establish the centre of gravity, repositioning yourself as necessary. See the "Installation" section of these instructions for recom mended lift points. Remember The circumstances of each installation are different. Always assess the risks associated with handling and lifting according to the individual con ditions. If at any time when installing the boiler you feel that you may have in jured yourself STOP !! DO NOT "work through" the pain - you may cause further injury. IF IN ANY DOUBT DO NOT HANDLE OR LIFT THE BOILER — OBTAIN ADVICE OR ASSISTANCE BEFORE PROCEEDING ! 1.5 Liabilities 1.5.1 Manufacturer's liability Our products are manufactured in compliance with the requirements of the various Directives applicable. They are therefore delivered with the marking and any documents necessary. In the interests of the quality of our products, we strive constantly to improve them. We therefore reserve the right to modify the specifications given in this document. Our liability as manufacturer may not be invoked in the following cases: Failure to abide by the instructions on installing the appliance. Failure to abide by the instructions on using the appliance. Faulty or insufficient maintenance of the appliance. 1.5.2 Installer's liability The installer is responsible for the installation and initial commissioning of the appliance. The installer must observe the following instructions: Read and follow the instructions given in the manuals provided with the appliance. Install the appliance in compliance with prevailing legislation and stand ards. Carry out initial commissioning and any checks necessary. Explain the installation to the user. If maintenance is necessary, warn the user of the obligation to check the appliance and keep it in good working order. Give all the instruction manuals to the user. 1.5.3 User's liability To guarantee optimum operation of the system, you must abide by the fol lowing instructions: Read and follow the instructions given in the manuals provided with the appliance. Call on a qualified professional to carry out installation and initial com missioning. Get your installer to explain your installation to you. Have the required inspections and maintenance carried out by a quali fied installer. Keep the instruction manuals in good condition close to the appliance. 1 Safety 10 600 System 2

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This manual is intended for installers and service engineers of Baxi 600 System 2 boilers 2.3 Symbols used 2.3.1 Symbols used in the manual This manual uses various danger levels to draw attention to special instructions. We do this to improve user safety, to prevent problems and to guarantee correct operation of the appliance. Danger Risk of dangerous situations that may result in serious personal injury. Danger of electric shock Risk of electric shock. Warning Risk of dangerous situations that may result in minor personal injury. Caution Risk of material damage. Important Please note: important information. See Reference to other manuals or pages in this manual. 2 About this manual 2.1 General 600 System 2 11 2.4 Abbreviations/Glossary BS CH DHW GB British Standard Central heating Domestic hot water Great Britain HHIC Heating and Hotwater Industry Council Hi Hs IE PCU Pn Pnc SU Lower heating value (LHV) Higher heating value (HHV) Ireland PCB for managing burner operation Nominal output Condensing output Safety PCB 2 About this manual 2.2 Additional documentation These Installation & Service Instructions must be read in conjunction with the Flue Accessories Fitting Guide supplied in the Literature Pack. Various timers, external controls, etc. are available as optional extras. Full details are contained in the relevant sales literature.

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3 Technical specifications 3.1 Homologations 3.1.2 Certifications Tab.1 Certifications & G.C. nos. CE certificate number 0085CU0338 NOx class 6 Boiler type C13, C33 3.1.3 Gas category Gas category Gas type Supply pressure (mbar) I2H G20 (H natural gas) 20 3 Technical specifications 12 3.1.4 Standards Codes of Practice — refer to the most recent version Tab.3 In GB the following Codes of Practice apply: 3.1.1 Safety, Performance & Quality This boiler has been assessed by an appropriate Notified Body and shown to meet the requirements of all Directives and Regulations as applicable. These Directives and Regulations lay down requirements for the safety and efficiency of the appliance, together with its design, construction and use of materials. They also require the production process to be covered by an approved and monitored system of quality assurance. Tab.2 Gas category, type and supply pressure Standard Scope BS 6891 Gas Installation. BS 5546 Installation of hot water supplies for domestic purposes. BS EN 12828 Heating systems in buildings. BS EN 12831 Heating systems in buildings — Calculation of load. BS EN 14336 Installation & commissioning of water based heating sys tems. BS 6798 Installation of gas fired hot water boilers. BS 5440 Part 1 Flues. BS 5440 Part 2 Ventilation. Important This appliance is suitable for G20 gas containing up to 20% hydrogen (H2). Due to variations in the percentage of H2, the percentage of O2 may vary over time. (For example: 20% of H2 in the gas may lead to a 1.5% increase of O2 in the flue gases). Under these circumstances it is recommended NOT to adjust the gas control valve. 600 System 2 I3P G31 (P LPG) 37 UKCA certificate number 748353 G.C. nos. 615-2: 41-884-01 618-2: 41-884-02 624-2: 41-484-03

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3 Technical specifications 600 System 2 13 Tab.4 In IE the following Code of Practice apply: Standard Scope IS 813 Domestic Gas Installations. The following standards give valuable additional information: BS 5546 Installation of hot water supplies for domestic purposes. BS EN 12828 Heating systems in buildings. BS EN 12831 Heating systems in buildings — Calculation of load. BS EN 14336 Installation & commissioning of water based heating sys tems. BS 7074 Expansion vessels and ancillary equipment for sealed wa ter systems. BS 7593 Treatment of water in domestic hot water central heating systems. 3.2 Technical data Tab.5 Technical settings for combination heaters with boilers 3.2.1 Technical information Important All data in these sections are nominal and subject to normal pro duction tolerances. BS 7074 Expansion vessels and ancillary equipment for sealed wa ter systems. BS 7593 Treatment of water in domestic hot water central heating systems. BS 4814 Specification for Expansion Vessels using an internal dia phragm, for sealed hot water systems. IGE/UP/ 7/1998 Guide for gas installations in timber framed housing. Standard Scope 15 System 18 System &RQGHQVLQJERLOHU <HV <HV /RZWHPSHUDWXUHERLOHU 1R 1R %ERLOHU 1R 1R 24 System <HV 1R 1R

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3 Technical specifications 14 15 System 18 System &RJHQHUDWLRQVSDFHKHDWHU 1R 1R &RPELQDWLRQKHDWHU <HV <HV 5DWHGKHDWRXWSXW 3UDWHG N: 8VHIXOKHDWRXWSXWDWUDWHGKHDWRXWSXWDQG KLJKWHPSHUDWXUHVHWWLQJ 3 N: 8VHIXOKHDWRXWSXWDWRIUDWHGKHDWRXWo SXWDQGORZWHPSHUDWXUHVHWWLQJ 3 N: 6HDVRQDOVSDFHKHDWLQJHQHUJ\HIILFLHQF\ ŠV 8VHIXOHIILFLHQF\DWUDWHGKHDWRXWSXWDQGKLJK WHPSHUDWXUHVHWWLQJ Š 8VHIXOHIILFLHQF\DWRIUDWHGKHDWRXWSXW DQGORZWHPSHUDWXUHVHWWLQJ Š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r&IRUORZWHPSHUDWXUHERLOHUV r&DQGIRURWKHUKHDWHUV r&UHWXUQWHPSHUDWXUH DWKHDWHULQOHW +LJKWHPSHUDWXUHVHWWLQJPHDQVr&UHWXUQWHPSHUDWXUHDWERLOHULQOHWDQGr&IORZWHPSHUDWXUHDWERLOHURXWOHW. 24 System 1R <HV 600 System 2 15 18 24 15.0 18.0 24.0 5.1 6.1 8.1 94 94 94 88.2 88.2 88.2 99.0 99.0 99.0 0.004 0.004 0.004 0.04 0.04 0.04 74 55 46 0.016 0.026 0.046 0.008 0.008 0.008 52 49 47 32 32 31 n/a n/a n/a n/a n/a n/a n/a n/a n/a n/a n/a n/a n/a n/a n/a 0 0 0

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3 Technical specifications 600 System 2 15 7DE7 &KDUDFWHULVWLFVRIWKHKHDWLQJFLUFXLW 15 System 18 System 0D[LPXPSUHVVXUH EDU 0LQLPXPSUHVVXUH EDU 7HPSHUDWXUHUDQJHIRUKHDWLQJFLUFXLW r& - - :DWHUFDSDFLW\RIH[SDQVLRQYHVVHO O 7DE8 &RPEXVWLRQFKDUDFWHULVWLFV 15 System 18 System *JDVFRQVXPSWLRQ4PD[ PK *JDVFRQVXPSWLRQ4PD[ZLWKGRPHVWLFKRWZDWHUWDQN PK *JDVFRQVXPSWLRQ4PLQ PK 'LDPHWHURIFRD[LDOGLVFKDUJHSLSHV PP )OXHJDVPDVVIORZUDWHPD[ NJVHF )OXHJDVPDVVIORZUDWHPD[ZLWKGRPHVWLFKRWZDWHUWDQN NJVHF )OXHJDVPDVVIORZUDWHPLQ NJVHF 7DE10 (OHFWULFDOFKDUDFWHULVWLFV 3RZHUVXSSO\YROWDJH 9 3RZHUVXSSO\IUHTXHQF\ +] 5DWHGHOHFWULFSRZHU : 85 7DE11 2WKHUFKDUDFWHULVWLFV +XPLGLW\SURWHFWLRQUDWLQJ(1 ,3 ;' ;' ;' 1HWZHLJKWZKHQHPSW\ILOOHGZLWKZDWHU NJ 'LPHQVLRQVKHLJKWZLGWKGHSWK PP 24 System - 24 System ;' 0.002 88 0.002 91 29/31 30/31 15 System 18 System 24 System 15 System 18 System 24 System 2.5 2.5 2.5 1.64 1.97 2.61 0.007 0.009 0.011 1.64 1.97 2.61 0.007 0.009 0.011

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3.3 Dimensions and connections Fig.3 Dimensions and connections 3 Technical specifications 16 3.2.1 Features of the temperature sensors 7DE3 7HPSHUDWXUHIORZKHDWLQJFLUFXLWUHWXUQVHQVRU17&.%HWD k2KP# r& 7HPSHUDWXUH>r&@ 5HVLVWDQFH>˖@ 7DE4 )OXHJDVWHPSHUDWXUHVHQVRU17&.%HWD N2KP# r& 7HPSHUDWXUH>r&@ 5HVLVWDQFH>˖@ ಧಧಧಧಧ! ಧಧಧಧಧ! 7DE2 7HPSHUDWXUHVHQVRURXWGRRUVHQVRU17&%HWD N2KP# r& 7HPSHUDWXUH>r&@ 5HVLVWDQFH>˖@ &RQGHQVDWHRXWOHW +HDWLQJFLUFXLWIORZILWWLQJ*ರ Pressure relief & drain *DVLQOHWILWWLQJ*ರ +HDWLQJFLUFXLWUHWXUQILWWLQJ* Cable gland Boiler ID inc. serial number 600 System 2 7

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Fig.4 Paper template 3 Technical specifications 600 System 2 17

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3.4 Electrical diagram Fig.5 Boiler electrical wiring diagram 3 Technical specifications 18 Tab.15 Electrical connections X1 Power supply: L: Live 230 V – 50 Hz N: Neutral : Earthing connector X2 Fan supply (FAN) X3 Gas valve (GV) X4 Pump power supply X5 3-way valve motor power supply X6 Earth connections X7 Sensors: Limit thermostat (ST) Installation return temperature (SRT) Installation flow temperature (SFL) Flue gas temperature (FS) X8 Sensors: Heating circuit pressure switch (SP) Pump PWM signal (PWM PUMP) X9 CAN connection X10 Service interface X17 Open Therm room unit (OT) X17 Outside sensor (OS) X17 External tank sensor - accessory (BS) X15 Boiler stoppage (with open contact) RT Room thermostat contact (230 V) 600 System 2

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The purpose of this gas-fuelled condensing boiler is to heat water to a temperature that is lower than boiling point at atmospheric pressure. It must be connected to a heating installation and to a domestic hot water distribution system that is compatible with its power and performance ratings. Features of this boiler: Low pollutant emissions, High-efficiency heating, Combustion products discharged through a concentric connector, Front control panel with display, Lightweight and compact. 4.2 Operating principle 4.2.1 Air-gas adjustment The air is drawn in by the fan and gas injected directly at the height of the venturi. The fan revolution speed is regulated automatically by the electronic board based on the adjustment settings. The gas and air are mixed in the manifold. The gas/air ratio ensures that the quantity of gas and air are adjusted correctly to always obtain optimal combustion. The gas/air mixture is fed into the burner at the front of the exchanger. Here, the electric igniter triggers the mixture with a series of sparks that burn, producing thermal energy. 4.2.2 Combustion The burner heats the heating water circulating in the heat exchanger. When the temperature of the combustion gas is lower than the dew point (around 55 °C), the water vapour contained in the combustion gas condenses in the flue gas side of the heat exchanger. The heat recovered during this condensation process (the latent heat or condensing heat) is also transferred to the heating water. Once cooled, the combustion gases are discharged through the exhaust pipe. The condensed water is discharged through a siphon. 4.2.3 Heating and domestic hot water production System boilers can provide both heating and domestic hot water. Domestic hot water will be heated in a separate cylinder or tank by the system primary water via a submerged coil or similar. The system controls will prioritise the production of either heating or domestic hot water by the operation of a diverter valve in the primary circuit. With a demand for heating the pump circulates water through the primary circuit. Once the main burner ignites the fan speed controls the gas rate to maintain the heating temperature measured by the temperature sensor. When the flow temperature exceeds the set temperature, a 3 minute delay occurs before the burner relights automatically (anti-cycling). The pump continues to run during this period. When the demand is satisfied the burner is extinguished and the pump continues to run for a period of 3 minutes (Pump Overrun). 4 Description of the product 4.1 General description 19 600 System 2 4 Description of the product

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4 Description of the product 20 6FKHPDWLFGLDJUDP 0ain&omponents )LJ6 6FKHPDWLFGLDJUDP )LJ7 )XQFWLRQDOGLDJUDP 1. Heat exchanger 2. Pump 3. Safety valve 4. Heating flow 5. Heating return 1. Flue adaptor 2. Expansion vessel valve 3. Expansion vessel 4. Air-gas collector 5. Fan 6. Gas valve 7. Pump 8. Control panel/facia/PCB's 9. Cable gland 10. Condensate trap 11. Electrode 12. Burner flange 13. Silencer 600 System 2

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4.4 Control panel description 4.4.1 Description of the control panel Fig.9 Display screen 4.5 Contents of the package The boiler is delivered in a package including: Wall-hung gas boiler Wall bracket for fastening the boiler to the wall Fitting kit including taps Literature pack containing: Installation & Service Manual User Guide Template Flue Guide Warranty documents ErP product & package leaflets 4.6 Accessories & options Consult the sales catalogue for all available accessories and options. 4 Description of the product 600 System 2 21 Knobs HEATING: Using this knob you can modify the flow temperature for the heating installation (heating setpoint 25-80 °C). turn the knob anti-clockwise to reduce the temperature or to scroll through the menus. With an outside sensor connected it is possible to limit the setpoint value; turn the knob clockwise to increase the temperature or to scroll through the menus. DOMESTIC HOT WATER: Using this knob you can modify the domestic hot water temperature (DHW setpoint 35÷60 °C) or scroll through the menus to the left and right: turn anti-clockwise to reduce the temperature. turn clockwise to increase the temperature. Fig.8 Control panel Buttons F1 Back (previous menu) F2 Manual reset F3 Menu F4 Confirms selection or value. 1 Chimney sweep mode: Press keys F1 and F2 simultaneously. Chimney sweep mode is enabled (forced full load or low load for CO2 measurement). The burner is on. Display of the system water pressure. DHW operation is enabled. CH operation is enabled. Information menu: read out various current values. User menu: user-level parameters can be configured. Installer menu: installer-level parameter can be configured. Error menu: errors can be read out. Counter menu: various counters can be read out. Icons

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5 Before installation 5.1 Installation standards and rules 5.2 Installation requirements 5 Before installation 22 5.2.1 Gas supply The gas installation should be in accordance with the relevant standards. In GB this is BS 6891 (NG). In IE this is the current edition of IS 813 Domestic Gas Installations. The connection to the appliance is a 22 mm copper tail located at the rear of the gas service cock. Ensure that the pipework from the meter to the appliance is of adequate size, and the demands of any other gas appliances in the property are taken into consideration. Do not use pipes of a smaller diameter than the boiler gas connection (22 mm) UNLESS the stated gas rate can be achieved with pipe of lesser diameter and with all other gas appliances operating at maximum rate. 5.2.2 Electrical supply External wiring must be correctly earthed, polarised and in accordance with relevant regulations/rules. In GB this is the current IEE Wiring Regulations. In IE reference should be made to the current edition of ETCI rules. The mains supply is 230 V ~ 50 Hz fused at 3 A. Important The method of connection to the electricity supply must facilitate complete electrical isolation of the appliance. Connection must be via a fused double-pole isolator with a contact separation of at least 3 mm in all poles and servicing the boiler and system controls only. The boiler must be connected to the mains fused 3 A 230 V 50 HZ supply & control system using cable of 3 core 0.75 mm 3183Y multi strand flexible type. Warning Installation, repair and maintenance must only be carried out by a competent person. This document is intended for use by compe tent persons. Installation must be carried out in accordance with the prevailing regula tions, the code of practice and the recommendations in these instructions. Installation must also respect the following points: This instruction manual and any other applicable documentation Building Regulations British Standards Gas Safety Regulations Water Supply Regulations 600 System 2

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5.2.3 Hard water area Important Only water that has NOT been artificially softened must be used when filling or re-pressurising the primary system. If the mains cold water to the property is fitted with an artificial softening/treat ment device the source utilised to fill or re-pressurise the system must be upstream of such a device. 5.2.4 Bypass The boiler has an integral bypass. In some cases an additional bypass may be required depending upon system design. 5.2.5 System control Further external controls (e.g. room thermostat sensors) MUST be fitted to optimise the economical operation of the boiler in accordance with Part L of the Building Regulations. A range of optional controls is available. Full details are contained in the relevant Sales Literature. Any proprietary OpenTherm control MUST allow individual adjustment of CH and DHW temperature. 5.2.6 Treatment of water circulating systems All recirculatory water systems will be subject to corrosion unless an ap- propriate water treatment is applied. This means that the efficiency of the system will deteriorate as corrosion sludge accumulates within the system, risking damage to pump and valves, boiler noise and circulation problems. When fitting new systems flux will be evident within the system, which can lead to damage of system components. BS 7593 is a regulatory requirement within building regulations, Part L. All systems must be thoroughly drained and flushed out using appropriate proprietary flushing agent. A suitable inhibitor must then be added to the system. All system additives (flushing agents, cleansers, inhibitors etc.) must com- ply with the requirements of BS 7593. Full instructions are supplied with the products and for further information contact the additive manufacturer directly or consult their website. 5 Before installation 600 System 2 23 Important Any wiring to the boiler, from either the mains or an external control, MUST be cable of the following specification:- 0.75 mm 3183/4/5Y (depending on installation) multi strand flexible cable conforming to BS 50525-2-11. Cable of the above specification is sufficiently flexible to with- stand normal regular opening and closing of the facia/control box as expected during routine servicing and other maintenance work. Use ONLY cable glands supplied with the boiler, or provided as spares by the manufacturer. Under no circumstances must solid core cable be used as it is not intended for applications where movement may occur. The use of solid core cable could result in situations potentially haz- ardous to health. These points must be considered when initially wiring the boiler to the installation, and if replacing any wiring during the service life of the boiler.

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5.2.7 Showers If a shower control is supplied from the appliance it should be of the ther mostatic or pressure balanced type. Thermostatic type shower valves pro vide the best comfort and guard against water at too high a temperature. Existing controls may not be suitable - refer to the shower valve manufac turer. 5.2.8 Expansion vessel (CH only) The appliance expansion vessel is pre-charged to 1.0 bar. Therefore, the minimum cold fill pressure is 1.0 bar. The vessel is suitable for correct op eration for system capacities up to 100 litres. For greater system capaci ties an additional expansion vessel must be fitted. For GB refer to BS 7074 Pt 1. For IE, the current edition of IS 813 Domes tic Gas Installations. Checking the charge pressure of the vessel - to check the charge accu rately ensure the system is cold. It is also necessary to relieve the pres sure by draining the boiler. Using a suitable gauge check the pressure at the valve on the underside of the vessel. Adjust the pressure as required and repressurise the system. 5.2.9 Safety pressure relief valve 1 2 A Discharge pipe Pressure relief valve & drain The end of the pipe should terminate facing down and towards the wall See BS 6798 for full details. The pressure relief valve is set at 3 bar, therefore all pipework, fittings, etc. should be suitable for pressures in excess of 3 bar and temperature in excess of 100 °C. The pressure relief discharge pipe should be not less than 15 mm diame- ter, run continuously downward, and discharge outside the building, pref- erably over a drain. It should be routed in such a manner that no hazard occurs to occupants or causes damage to wiring or electrical components. If it is anticipated that any part of the pipe may be subject to freezing it should be suitably insulated. The end of the pipe should terminate facing down and towards the wall. The discharge must not be above a window, entrance or other public ac- cess. Consideration must be given to the possibility that boiling water/ steam could discharge from the pipe. Important The relief valve can be used as a drain. A remote relief valve kit is available to enable the boiler to be installed in cellars or similar locations below outside ground level. Fig.10 Discharge pipe 1 A 24 A boiler discharge pump is available which will dispose of both condensate & high temperature water from the relief valve. It has a maximum head of 5 metres. Important Failure to flush and add inhibitor to the system will invalidate the appliance warranty. It is important to check the inhibitor concentration after installation, system modification and at every service in accordance with the inhibitor manufacturer. (Test kits are available from inhibitor stockists.) For information or advice regarding any of the above contact Baxi Customer Support 0344 871 1545. 5 Before installation 600 System 2

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5.3 Flow rate/head at the plate characteristics Fig.11 Graph of flow rate/head at the plate BO-0000226 Tab.16 Description of graph of flow rate/head at the plate Q Flow volume h Dynamic head 85 % Minimum modulation value in heating mode 100% Maximum value in heating mode To prevent flow noise, you must pay attention to the hydraulic design of the heating installation. The system uses a high-head, modulating pump that is suitable for use on any type of one- or two-pipe heating system. The automatic air vent valve built into the pump body enables fast venting of the heating system. Operation of the pump in DHW mode —> 100% fixed. Operation of the pump in heating mode —> modulating by 85% to 100% . 5 Before installation 600 System 2 25

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5 Before installation 26 5.4 Choice of the location 5.4.1 Location of the boiler The boiler may be fitted to any suitable wall with the flue passing through an outside wall or roof and discharging to atmosphere in a position permit ting satisfactory removal of combustion products and providing an ade quate air supply. The boiler should be fitted within the building unless oth erwise protected by a suitable enclosure i.e. garage or outhouse. (The boiler may be fitted inside a cupboard.) Where the boiler is sited in an unheated enclosure and during periods when the heating system is to be unused it is recommended that the per manent live is left on to give BOILER frost protection. NOTE: THIS WILL NOT PROTECT THE SYSTEM ! If the boiler is fitted in a room containing a bath or shower reference must be made to the relevant requirements. In GB this is the current IEE Wiring Regulations and Building Regulations. In IE reference should be made to the current edition of IS 813 Domestic Gas Installations and the current ETCI rules. It is not necessary to protect any surface the boiler is mounted on from heat generated during normal operation unless required by local authority regulations. If the boiler is to be fitted into a building of timber frame construction then reference must be made to the current edition of Institute of Gas Engi neers Publication IGE/UP/7 (Gas Installations in Timber Framed Housing). Fig.12 Bathroom 1 and 2 A B C D D 0.6m A B C D E F 0.6m 2.25m 5.4.2 Bath and shower rooms A B C Zone 0 Zone 1 Zone 2 D E F Window recess Zone 2 Ceiling Outside zones Important The boiler has a protection rating of IPX5D and if installed in a room containing a bath or shower can be within Zone 2 (but not 0 or 1). Bathroom 1 and 2 ( in GB only) shows zone dimensions for a bathtub. For other examples refer to the Current IEE Wiring Regulations). Reference must be made to the relevant requirements. In GB this is the current IEE. Wiring Regulations and Building Regulations. In IE reference should be made to the current edition of IS 813 “Domestic Gas Installations” and the current ETCI rules. 600 System 2

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5 Before installation 27 5.4.3 Ventilation Where the appliance is installed in a cupboard or compartment, no air vents are required. BS 5440: Part 2 refers to room sealed appliances in stalled in compartments. The appliance will run sufficiently cool without ventilation. 5.4.4 Condensate drain It is strongly recommended to discharge internally into the household drainage system. If connecting to a rain water drain, that drain MUST dis charge into a foul drain. 1 2 3 4 5 6 7 8 9 10 11 12 Pipework. Insulation. 50 mm per metre of pipe run — 2.5° minimum run. 450 mm minimum is applicable to properties up to 3 storeys. For multi-storey building installations consult BS 6798. Boiler. Sink. Pipe must terminate above water level but below surrounding sur-face. Cut end at 45°. Holes in the soak-away must face away from the building. 500 mm mimimum. Basement or similar (heated) Condensate pump Unheated Location (e.g. Garage) Tab.17 Examples are shown of the following methods of termination Key Description A Termination to an internal soil and vent pipe. B External termination via internal discharge branch e.g. sink waste — downstream (It is NOT RECOMMENDED to connect upstream of the sink or other waste water receptacle!) C Termination to a drain or gully. D Termination to a purpose made soakaway Further specific re quirements for soakaway design are referred to in BS 6798 E Pumped into an internal discharge branch (e.g. sink waste) down stream of the trap. F Pumped into an external soil and vent pipe. G Termination to a drain or gully with extended external run and trace heating. The "Trace Heating" element must be installed in accordance with the instructions supplied. External runs and those in unheated locations still require insulation. Fig.13 Pipework and method of termination PN-0000389 A B C D 3 3 3 3 4 6 5 5 5 5 7 7 8 9 21.5mm 32mm 2 600 System 2

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5 Before installation 28 Important Failure to install the condensate discharge pipework correctly will affect the reliable operation of the boiler. Careful consideration must be given to the possibility of the pipe- work being subject to freezing conditions and appropriate meas- ures taken to prevent blockage. Correct installation in accordance with this section will considerably minimise the likelihood of block- age and subsequent boiler lock-out. A condensate discharge pump and pipe "Trace Heating" are avail- able as accessories. The condensate discharge pipe MUST NOT RISE at any point along its length. There MUST be a fall of AT LEAST 2.5° (50 mm per metre) along the entire run EXCEPT when employing a suita- ble condensate pump in basement and cellar or similar applica- tions. The boiler condensate trap incorporates a seal of 75 mm, therefore it is unnecessary to install an air break and trap in the discharge pipework. The condensate outlet will accept 21.5 mm (3/4 in) plastic overflow pipe. It is strongly recommended that this discharges internally into the household drainage system. Where this is not possible, discharge into an outside drain is permissible providing every possible precaution is taken to prevent freezing. Ensure the discharge of condensate complies with any national or local regulations in force. BS 6798 & Part H1 of the Building Regulations give further detailed guidance. The discharge pipe should be run in a proprietary drain pipe material e.g. PVC, PVC-U, ABS, PVC-C or PP. Metal pipework is NOT suitable for use in condensate discharge systems. The pipe should be a minimum of 21.5 mm diameter and must be suppor- ted using suitably spaced clips of the correct design to prevent sagging. It is advisable that the full length of condensate pipe is run internally and preferably be less than 3 metres. Internal runs greater than 3 metres or runs in cold areas should use 32 mm waste pipe. External runs MUST be a MINIMUM of 32 mm and fully insulated with ma-terial suitable for external use. If the boiler is fitted in an unheated location the entire condensate dis- charge pipe should be treated as an external run and sized and insulated accordingly. In all cases discharge pipe must be installed to aid disposal of the conden- sate. To reduce the risk of condensate being trapped, as few bends and fittings as possible should be used and any burrs on cut pipe removed. When discharging condensate into a soil stack or waste pipe the effects of existing plumbing must be considered. If soil pipes or waste pipes are sub- jected to internal pressure fluctuations when WC's are flushed or sinks emptied then backpressure may force water out of the boiler trap and cause appliance lockout. A boiler discharge pump is available which will dispose of both condensate & high temperature water from the relief valve. It has a maximum head of 5 metres. Follow the instructions supplied with the pump. Condensate Drain Pipe "Trace Heating" Elements are available in various lengths, 1, 2, 3 & 5 metres. Where the drain is between 3 & 5 metres a 5 metre kit can be used and "doubled back" upon itself. It is possible to fit the element externally on the condensate drain or inter- nally as detailed in the instructions provided. The fitting of a "Trace Heating" Element is NOT a substitute for correct in- stallation of the condensate drain. ALL requirements in this section must still be adhered to. Fig.14 Methods of termination continued PN-0000455 E 3 5 F G 3 3 5 5 7 7 10 11 11 10 12 6 600 System 2

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5 Before installation 29 5.4.5 Clearances A flat vertical area is required for the installation of the boiler and it should be capable of bearing the weight of the boiler when full of water. These dimensions include the necessary clearances around the boiler for case removal, spanner access and air movement. Additional clearances may be required for the passage of pipes around local obstructions such as joists running parallel to the front face of the boiler. In the diagram these are MINIMUM recommended dimensions. Greater clearance will aid installation and maintenance. 5.4.6 Flue/chimney location The following guidelines indicate the general requirements for siting bal anced flue terminals. For GB recommendations are given in BS 5440 Pt 1. For IE recommendations are given in the current edition of I.S. 813 Do mestic Gas Installations. Important Due to the nature of the boiler a plume of water vapour will be dis charged from the flue. This should be taken into account when sit ing the flue terminal. Fig.16 Flue outlets R T U J,K J,K A D E C I I I A A S F H H B G F I I L N M PN-0000456 1 1 Flue positions marked require a flue terminal guard. Tab.18 Terminal position with minimum distance Key Description mm Key Description mm A (1) Directly below an opening, air brick open ing window etc. 300 J From a surface or boundary line facing a terminal 600 B (1) Above an opening, air brick, opening win dow etc. 300 K From a terminal facing a terminal (Horizontal flue) 1200 From a terminal facing a terminal (Ver tical flue) 600 Fig.15 Clearances 600 Combi 2

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5 Before installation 30 Key Description mm Key Description mm C (1) Horizontally to an opening, air brick, opening window etc. 300 L From an opening in carport (e.g. door, window) into the dwelling 1200 D (2) Below gutters, soil pipes or drain pipes 25 (75) M Vertically from a terminal on the same wall 1500 E (2) Below eaves 25 (200) N Horizontally from a terminal on the same wall 300 F (2) Below balconies or car port roof 25 (200) R From adjacent wall to flue (vertical on ly) 300 G (2) From a vertical drain pipe or soil pipe 25 (150) S From an adjacent opening window (vertical only) 1000 H (2) From an internal or external corner 25 (300) T Adjacent to windows or openings on pitched and flat roofs 600 I Above ground, roof, or balcony level 300 U Below windows or openings on pitch ed roofs 2000 (1) In addition, the terminal should be no nearer than 150 mm to an opening in the building fabric formed for the purpose of accommodating a built-in element such as a window frame. (2) Only ONE 25 mm clearance is allowed per installation. If one of the dimension D,E,F,G or H is 25 mm then the remainder MUST be as shown in brackets, in accordance with BS 5440–1. Important Under car ports we recommend the use of the plume displace ment kit. The terminal position must ensure the safe and nuisance - free dispersal of combustion products. If the terminal discharges onto a pathway or passageway, check that com bustion products will not cause a nuisance and that the terminal will not obstruct the passageway. If a terminal is less than 2 metres above a balcony, above ground or above a flat roof to which people have access, then a suitable terminal guard must be provided. 1 2 3 A Property boundary line Terminal assembly Top view rear flue 300 mm minimum* *Reduction to the boundary is possible down to 25 mm but the flue deflector must be used. Important The distance from a fanned draught appliance terminal installed parallel to a boundary may not be less than 300 mm in accordance with the diagram opposite. Fig.17 Property boundary PN-0000457 3 1 2 A* 600 System 2

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5 Before installation 31 1 2 3 A Opening window or door Air inlet Plume displacement kit 150 mm minimum Important If fitting a Plume Displacement Flue Kit, the air inlet must be a minimum of 150 mm from any opening windows or doors. Important The Plume Displacement flue gas discharge terminal and air inlet must always terminate in the same pressure zone i.e. on the same facing wall. 5.4.7 Horizontal flue/chimney systems Total equivalent length = A+B+C+2 x 90° bends Important Horizontal flue extensions should always be installed with a fall of at least 1.5° from the terminal to allow condensate to run back to the boiler. Extensions of 250 mm, 500 mm and 1 m are available. All fittings should be fully engaged. The approximate engagement is 40 mm. Apply the lubricant supplied to the seal on each fitting to aid as- sembly. Tab.19 Maximum permissible equivalent flue lengths are:- Horizontal concentric 60/100 Diameter 80/125 Diameter 10 metres 20 metres Any additional "in line" bends in the flue system must be taken into consid eration. Tab.20 Their equivalent lengths are:- Concentric pipes 135° bend 0.5 metres 93° bend 1.0 metres The elbow supplied with the flue kit is not included in any equivalent length calculations. Important Flue length is measured from point (i) to (ii) as shown. See Read this section in conjunction with the Flue Installation Guide supplied with the boiler. This document includes details of vertical flue/chimney systems and plume displacement kits. Fig.18 Plume displacement kit PN-0000458 3 1 2 A Fig.19 Horizontal flues 3 1 2 A 3 C B (i) (ii) 600 System 2 Only to be used for horizontal termination 2 Flue trims 3 This bend is equivalent to 1 metre

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It is preferrable that only the flue terminal protrudes from the wall. However, where circumstances dictate, it is permissible for the air duct (white tube) to be visible outside the property up to a maximum distance of 100 mm (Fig. 18a), providing the flue is adequately supported and conforms to the appropriate sections of B.S.5440:1, the boiler Installation Manual and flue guide. If the flue is greater than 25 mm below a balcony, car port or similar the flue may protrude up to a maximum distance of 500 mm ‘V’ (Fig. 18b). Where the flue will terminate beyond a balcony, car port or similar and the distance between the flue and underside of the balcony, car port or similar is only 25 mm at ‘Z’ it must protrude 100 mm ‘Y’ beyond the outer edge (Fig. 18c). Where the flue exits under a balcony, car port or similar in excess of 500 mm, the distance between the flue and underside of the balcony, car port or similar MUST be 25mm at ‘Z’ and this can be achieved with the use of elbows (Fig. 18d). It is also a requirement that the flue must protrude 100 mm ‘Y’ beyond the outer edge (Fig 18c.) The horizontal 60/100 & 80/125 flue systems, including bends and extensions, are UV stable. If any flue joint is external to the property, seal the joint with silicone sealant suitable for external use, not the tape supplied. The maximum equivalent flue lengths as stated in the appropriate boiler Installation & Service Manual must not be exceeded. The flue must always be installed with a fall of at least 1.5° from the terminal to allow condensate to run back to the boiler. %HIRUHLQVWDOODWLRQ NOTE: For clarity support brackets are not shown in these illustrations. Fig. 18a Fig. 18b 2 600 System 2

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3 NOTE: For clarity support brackets are not shown in these illustrations. Fig. 18c Fig. 18d 600 System 2

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5 Before installation 34 Warning SUPPORT - All flue systems MUST be securely supported at a MINIMUM of once every metre & every change of direction. It is recommended that every straight piece is supported irrespective of length. Additional supports are available as accessories. VOIDS - Consideration must be given to flue systems in voids and the provision of adequate access for subsequent periodic visual inspection. 5.4.8 Flue/chimney trim The flexible flue trims supplied can be fitted on the outer and inner faces of the wall of installation. 5.4.9 Terminal guard When codes of practice dictate the use of terminal guards Multifit accesso ry part no. 720627901 can be used Important This guard is not compatible with Flue Deflector referred to below. There must be a clearance of at least 50 mm between any part of the terminal and the guard. When ordering a terminal guard, quote the appliance name and model number. The flue terminal guard should be positioned centrally over the terminal and fixed as illustrated. 5.4.10 Flue/chimney deflector 1 Flue deflector Push the flue deflector over the terminal end. It may point upwards as shown, or up to 45° either way from vertical. Secure the deflector to the terminal with screws provided. 5.4.11 Flue/chimney accessories See For full details of Flue Accessories (elbows, extensions, clamps etc.) refer to the Flue Installation Guide supplied in the literature pack. Fig.20 Flexible flue trims PN-0000390 Fig.21 Terminal guard PN-0000460 1 Fig.22 Flue deflector PN-0000461 1 600 System 2

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5 Before installation 35 5.4.12 Data plate and boiler service label The data plate is located above the boiler controls. The data plate provides important information about the appliance (see the sample data plate shown in the figure). Also note the LPG conversion label which must be amended when converting to LPG (section 7.4.3). Fig.23 Position of the data plate Fig.24 Typical data plate & LPG conversion label Fig.25 User information label 5.5 Transport The boiler should be transported vertically using a sack truck or similar as indicated on the packaging. Warning Lifting the boiler should be performed by two people. 600 System 2

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5 Before installation 36 5.6 Unpacking & initial preparation 5.6.1 Unpacking Caution RISK ASSESSMENT - Before commencing the installation it is recommended that the "Five Steps to Risk Assessment" docu ment published by the HSE is consulted, and an assessment per formed as described. GAS SUPPLY - The gas supply, gas type and pressure must be checked for suitability before connection. See Handling, page 9 before unpacking or lifting the boiler. To unpack the boiler: 1. Remove the banding. 2. Open the flaps and remove the wall bracket. 3. Slide the sleeve upwards. 4. Remove the upper tray and installation kit. 5. Remove the upper packing piece. Important Care must be taken to avoid damage from any residual water in the boiler. 600 System 2 Fig.26 Unpacking the boiler

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5.7 Connecting diagrams A B C D E Mains cold water Central heating return Stop valve Double check valve (Not supplied) Loop (Not supplied) A filling point connection on the central heating return pipework must be provided to facilitate initial filling and pressurising and also any subsequent water loss replacement/refilling. The filling method adopted must be in accordance with all relevant water supply regulations and use approved equipment. Your attention is drawn to: for GB: Guidance G24.2 and recommendation R24.2 of the Water Regu lations Guide. for IE: the current edition of I.S. 813 Domestic Gas Installations. A Cold mains in B Heat return The sealed primary circuits may be filled or replenished by means of a temporary connection between the circuit and a supply pipe, provided a "Listed" double check valve or some other no less effective backflow pre-vention device is permanently connected at the inlet to the circuit and the temporary connection is removed after use. Fig.28 System filling circuit 5 Before installation 37 5.7.1 Filling information 600 System 2 5.6.2 Initial preparation 1. 2. 3. 4. After considering the site requirements position the fixing template on the wall ensuring it is level both horizontally and vertically. Mark the position of the two most suitable fixing slots for the wall bracket. Mark the position of the centre of the flue hole (rear exit). For side flue exit, mark as shown. If required, mark the position of the gas and water pipes. Remove the template. 5. Cut the hole for the flue (minimum diameter 116 mm). 6. 7. Drill the wall as previously marked to accept the wall plugs supplied. Secure the wall bracket using the fixing screws. Using a spirit level ensure that the bracket is level before finally tightening the screws. Fig.27 Template 150 mm

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6 Installation 6.1 General Installation must be carried out in accordance with the prevailing regula tions, codes of practice and the recommendations in this manual. Danger If the boiler is installed in a compartment do not use it for storage purposes. Do not obstruct any purpose provided ventilation open ings. Caution Where the boiler is sited in an unheated enclosure provision must be made to protect against frost, e.g. frost thermostat, pipe ther mostat. 1. Lift the boiler and hook onto the wall plate. 2. Remove the sealing caps from the connections under the boiler. Warning Some residual water may escape when removing the sealing caps. Take precautions to avoid damage to components ! 3. Remove the taps, elbow and sealing washers from the fitting kit. The taps and elbow accept 15 mm or 22 mm copper pipe as appropriate — see template. 4. Connect the appropriate tap to the heating flow and return pipework, gas supply and mains cold inlet. 5. Connect the elbow to the DHW flow outlet. 6. Using the sealing washers provided connect the taps and elbow to the boiler. 7. Ensure all joints are tight. 6.2 Assembly 6.2.1 Fitting the pressure relief discharge pipe Fig.32 Pressure relief pipe connection Fig.30 Mounting the boiler Fig.31 Connecting the taps 6 Installation 38 600 System 2 1. Remove the discharge pipe elbow (1) from the kit. 2. 3. 4. 5. Determine the routing of the discharge pipe in the vicinity of the boiler. Make up as much of the pipework as is practical, including the discharge pipe elbow supplied. Important Make all soldered joints before connecting to the pressure relief valve. Do not adjust the position of the valve. The discharge pipe must be installed before pressurising the system. The pipework must be at least 15 mm diameter and run continuously downwards to a discharge point outside the building. Push the discharge elbow onto the valve outlet spigot (2) until a 'click' is felt indicating correct location. Complete the discharge pipework and route it to the outside dis- charge point.

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6 Installation 6. The pipework must be clipped at suitable intervals to support it, com mencing as close to the boiler as possible. 6.2.2 Connecting the condensate drain 1. Remove the blanking cap, and using the straight rubber coupling supplied, connect the condensate drain pipework to the boiler con densate trap outlet pipe. See Ensure the discharge of condensate complies with any national or local regulations in force (see HHIC recommendations). See Condensate drain, page 27. 2. The straight rubber coupling will accept 21.5 mm (3/4 in) plastic over-flow pipe which should generally discharge internally into the house-hold drainage system. If this is not possible, discharge into an out-side drain is acceptable. Important The boiler condensate trap should be primed by pouring approximately 300 ml of water into the flue spigot. Do not allow any water to fall into the air inlet. 6.3 Air supply/flue gas connections 6.3.1 Connecting the flue/chimney HORIZONTAL TELESCOPIC FLUE 720598701 (concentric 60/100) 1 2 3 315 mm to 500 mm Connection assembly Terminal assembly There are two telescopic sections, the terminal assembly and the connec tion assembly, a roll of sealing tape and two self tapping screws. A 93° el bow is also supplied. The two sections can be adjusted to provide a length between 315 mm and 500 mm when measured from the flue elbow (there is 40 mm engagement into the elbow). 1. 2. 3. Locate the flue elbow on the adaptor at the top of the boiler. Set the elbow to the required orientation. Important The flue elbow is angled at 93° to ensure a fall back to the boiler. Measure the distance from the outside wall face to the elbow. This dimension will be known as " X" . If the distance from the flue elbow to the outside face of the wall is less than 250 mm the connection assembly can be discarded and the terminal assembly fitted directly into the elbow. 4. In instances where the dimension " X" is between 250 mm and 315 mm it will be necessary to shorten the terminal assembly by careful cutting to accommodate walls of these thicknesses. Fig.33 Pour 300ml of water into flue spigot PN-0000602 Fig.34 Telescopic flue 3 1 2 Fig.35 Flue dimension X X X 600 System 2 39 When installing internal fit telescopic flue & elbow kits 7778296 & 7778299 refer to the instructions supplied with them.

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5. To dimension " X" add 40 mm. This dimension to be known as "Y" . 1 2 3 4 TOP label Sealing tape Securing screw Peak to be uppermost 6. Adjust the two telescopic sections to dimension "Y" and seal the joint with the tape provided. Ensure that the labels marked "TOP" on the terminal and connection assemblies are uppermost. 7. 8. Using the clearance holes in the connection assembly secure it to the terminal assembly using the screws supplied with the telescopic flue. Remove the flue elbow and insert the flue through the hole in the wall. Fit the flue trims if required, and refit the elbow to the boiler adaptor, ensuring that it is pushed fully in. Secure the elbow with the screws supplied in the boiler fitting kit. 1 2 3 4 5 A B C Flue elbow Boiler adaptor Telescopic flue Flue trim Securing screw Apply the lubricant supplied for ease of assembly (do not use any other type). Ensure flue is fully engaged into elbow. Apply the lubricant supplied for ease of assembly (do not use any other type). Ensure elbow is fully engaged into boiler adaptor. Peak to be uppermost 9. Draw the flue back through the wall and engage it in the elbow. It may be necessary to lubricate to ease assembly of the elbow and flue. 10. Ensure that the terminal is positioned with the slots to the bottom. Secure to the elbow with the screws supplied with the telescopic flue. Important It is essential that the flue terminal is fitted as shown to ensure correct boiler operation and prevent water entering the flue. 11. Make good between the wall and air duct outside the building, ap propriate to the wall construction and fire rating. 12. If necessary fit a terminal guard. Fig.36 Flue dimension Y PN-0000464 Y 1 2 1 3 4 Fig.37 Attaching the flue PN-0000465 1 2 3 4 4 5 A B C 6 Installation 40 600 System 2

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6.4.1 Accessing the electrical connections Fig.38 Accessing the circuit board 6 Installation To access the electrical connection board: Pull the control panel downwards (1). Lift the rear cover (2). Release the catches to remove the cover (3). Important Do not use excessive force as this could break the plastic hooks. See Section 10.3.1 Accessing the boiler components to remove the front cover 1 2 3 The supply cable is connected to the connection PCB using the CB1 connection (Fig. 39). : Earth connection: 6.4.2 Connecting the room thermostat Before connecting the room thermostat (RT) or Open Therm (OT) device, remove the link wire on the terminal board as shown in figure 39. Fig.39 Connecting the room thermostat RT The connections are as follows: L: 230 V (brown wire) N: Neutral (blue cable) 6.4 Electrical connections The electrical safety of the equipment is only ensured when it is correctly connected to an effective earthing system in accordance with the prevailing safety standards for installations. The boiler must be electrically connected to a 230 V single phase + earth mains supply using the three- wire cable provided, respecting the Line-Neutral polarity. Caution This connection must be made using a two-pole switch with contact opening of at least 3 mm. If the power supply cable must be replaced, a harmonised “HAR H05 VV- F” 3x0.75 mm2 cable with a maximum diameter of 8 mm must be used. Warning Check that the total nominal consumption of the accessories connected to the appliance is less than 1 A. If it is higher, a relay must be installed between the accessories and the electronic board. 600 System 2 41

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6 Installation 6.4.3 Service connection (SERVICE) Connect the wireless interface to terminal X10 on the boiler PCB, as shown in the chapter entitled "Electrical diagram". 6.4.4 Connecting on wall outdoor sensor The sensor must be fixed to an external wall surface of the property it is serving. The wall must face north or west. Under no circumstance must it be fixed to a south facing wall in direct sunlight. The sensor must be positioned approximately at half the height of the liv ing space of the property, and a minimum of at least 2.5 metres above ground level. To ensure accurate operation do not position the sensor in the proximity of any heat or cooling source (e.g. a flue terminal). Siting above doors & win dows, adjacent to vents and close to eaves should be avoided. 1. 2. 3. Once the position has been determined, prise the cover off the sen sor and mark through the sensor body the two fixing holes and the larger hole for the wiring. Drill & plug the two fixing holes (plugs and screws are supplied with the sensor). Also drill the hole for the sensor wiring. Insert the sensor wiring through the hole in the wall, leaving suffi cient length outside to allow connection. Seal the hole. Note: 0.5 mm 2 core cable is recommended (the sensor is a low voltage device). This wiring is NOT supplied in the kit. 4. If it is not possible to pass the wiring through the wall directly behind, remove the circular ‘knock-out’ panel in the sensor base to allow connection. 5. Using the screws provided fit the body to the wall. Insert the wires in the two-way terminal block and secure them. Replace the sensor cover. 6. Ensure the electrical supply to the boiler is isolated and remove the front panel. 7. Hinge down the control box and unclip the connection board cover. 8. Pass the wires from the sensor through the cable gland in the bottom of the boiler lower panel, leaving sufficient slack to allow the control box to be hinged fully open. Fig.40 Sensor position N S W E X X North West 1/2 H 2.5m Min H PN-0000626 6.4.6 Identifying label Important The identifying label (7221476-01) supplied with the outdoor sen sor must be signed and affixed on or adjacent to the boiler. The label must be readily accessible without removing the boiler cas ing or any other disassembly. This label is required to enable SAP and energy assessors to identify that a weather compensation de vice is installed and connected . 6.4.5 Connecting the outside sensor (OS) Connect the outdoor sensor on terminal CB6 (T/OUT) of the connection board as shown in Fig. 41. Important Set the type of outside sensor used by implementing setting AP056 (see table paragraph "List of installer settings"). For more information, see The instructions supplied with the sensor. Fig.41 Connecting the outside sensor (OS) Cable gland 42 600 System 2

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6.5 Filling the installation 6.6 Draining the installation Fig.43 Draining the installation 6 Installation 6.5.1 Flushing the system Flush thoroughly and treat the system according to guidance given in BS 7593. 6.5.2 Fill the installation A filling point connection on the central heating return pipework must be provided to facilitate initial filling and pressurising and also any subsequent water loss replacement/refilling. 1. Fill the installation using approved equipment and in accordance with all relevant water supply regulations. Important Your attention is drawn to: for GB: Guidance G24.2 and recommendation R24.2 of the Wa ter Regulations Guide. for IE: the current edition of I.S. 813 "Domestic Gas Installa tions" . 2. The sealed primary circuits may be filled or replenished by means of a temporary connection between the circuit and a supply pipe, provi ded a ‘Listed’ double check valve or some other no less effective backflow prevention device is permanently connected at the inlet to the circuit and the temporary connection is removed after use. 3. Fill or replenish the sealed primary circuits by means of a temporary connection between the circuit and a supply pipe: Permanently connect a ‘Listed’ double check valve or some other no less effective backflow prevention device at the inlet to the cir cuit. Remove the temporary connection after use except if where a per manent connection is used. 6.5.3 Filling the condensate trap 1. Check that the boiler condensate trap has been primed before com missioning the boiler. 'UDLQ 600 System 2 43 1. The boiler can be drained via the pressure relief valve. Check routing is suitable for draining primary system water. 2. Remove the front panel and lower the controls. 3. Slowly open the drain anti-clockwise by hand. Do not use tools. Close the drain by turning clockwise. Do not over tighten. There is also a drain point fitted on the central heating flow isolation cock.

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Commissioning the boiler is done for first time use, after a prolonged shut- down (more than 28 days) or after any event that would require complete re-installation of the boiler. Commissioning of the boiler allows the user to review the various settings and checks to be made to start up the boiler in complete safety. 7.2 Checklist before commissioning Perform the following checks before commissioning the boiler: 1. Check that the gas type supplied matches the data shown on the boiler's data plate. Danger Do not commission the boiler if the gas supplied does not match the gas types approved for the boiler. 2. Check the connection of the earthing cable. 3. Check the gas circuit from the non-return valve to the burner. 4. Check the hydraulic circuit from the boiler's isolation valves to the heating circuit. 5. Check that the hydraulic pressure in the heating installation is between 1.0 and 1.5 bar. 6. Check the power supply connections to the various boiler components. 7. Check the electrical connections on the thermostat and the other external components. 8. Check the ventilation in the room in which the system is installed. 9. Check the flue gas connections. 7.3 Commissioning procedure Proceed as described below to commission the boiler: Open the main gas cock. Open the gas cock on the boiler. Open the front panel as described in the chapter entitled "Accessing the boiler electrical connection board". Check the gas supply pressure at the pressure socket on the gas valve. Check the leak tightness of the gas connections in the boiler upstream of the gas valve. Check the tightness of the gas pipe, including the gas valves. The test pressure must not exceed 60 mbar (6 kPa). Degas the gas supply pipe by unscrewing the pressure socket on the gas valve. Reclose the socket once the pipe has been sufficiently bled. Check that the siphon is full of water as described in the chapter entitled "Filling the siphon". Check that there are no leaks in the hydraulic connections. Check the seal/condition of the flue gas pipes. Use the two-pole switch to supply voltage to the boiler. Important For instructions on igniting the boiler, see the following chapter entitled “Procedure for first start-up”. 7 Commissioning 7.1 General 7 Commissioning 44 600 System 2

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7 Commissioning 7.4 Gas settings 7.4.1 Check the operational (working gas inlet pressure and gas rate) Note If the pressure drops are greater than shown in the diagram oppo-site, a problem with the pipework or connections is indicated. Permissible pressure drop across system pipework ≤ 1 mbar. Carry out chimney sweep. See Activating the chimney sweep function, page 45. Fig.44 Gas meter to valve 1. 2. 3. With the boiler operating in the maximum rate condition check that the operational (working) gas pressure at the inlet gas pressure test point is in accordance with BS 6798 & BS 6891. This must be AT LEAST 18 mb (Natural Gas) or 37 mb (LPG) ! Ensure that this inlet pressure can be obtained with all other gas ap pliances in the property working. The pressure should be measured at the gas test point on the gas inlet (A). Measure the gas rate— With any other appliances & pilot lights turned OFF the gas rate can be measured. It should be:- Tab.23 Natural gas 15 1.64 m3/h 18 1.97 m3/h Fig.45 Gas inlet test point 7.4.2 Combustion parameters The boiler has two dedicated sockets in order to measure the combustion efficiency and cleanliness of the combustion exhaust gases during operation. One socket is connected to the flue gas exhaust circuit (A) which is used to detect the cleanliness of the combustion exhaust gases and the combustion efficiency. The other is connected to the combustion air intake circuit (B) which is used to check for the possible recirculation of the combustion exhaust gases in the case of coaxial pipes. The following parameters can be measured when using the socket connected to the flue gas circuit: temperature of the combustion exhaust gases; concentration of oxygen O2 or alternatively carbon dioxide CO2; concentration of carbon monoxide CO. The temperature of the combustion air must be measured using the socket connected to the air intake circuit (B), inserting the measurement probe approx. 7 cm. In order to analyse the combustion exhaust gases, the chimney sweep function must be activated, as described below. Fig.46 Type of fittings — flue gas measuring point 24 2.61 m3/h 600 System 2 45 1.2 kg/h 1.44 kg/h 1.92 kg/h LPG

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7 Commissioning Fig.47 Examples of combustion checks Caution To analyse the products of combustion, ensure adequate heat exchange in the system in heating mode or in domestic water mode (by opening one or more domestic hot water cocks) to avoid the boiler shutting down as a result of overheating. For correct boiler operation, the CO2 (O2) content in the combustion gases must be within the tolerance range in section 7.4.4. Activating the chimney sweep function 1. Press the two F1 + F2 keys until the function activates. When the letter L appears on the display (followed by the flow temperature) the boiler is working at minimum power. Fig.48 Minimum power 2. Turn the knob one notch to the right. When the letter h appears on the display (followed by the flow temperature) the boiler is working at maximum power in HEATING MODE. Fig.49 Maximum power in heating mode 3. Turn the knob another notch to the right. When the letter H appears on the display (followed by the flow temperature) the boiler is working at maximum power in DOMESTIC WATER MODE. Important This function is carried out in heating mode. During this function, for LOW TEMPERATURE systems (such as underfloor heating), the flow temperature is limited by setting CP000 (maximum flow temperature). To activate the domestic water mode, configure the setting to GP082=1 Once finished, return the setting to GP082=0 To finish and exit the function press the F1 key. Caution Remember to return the setting to GP082=0 once the chimney sweep function is no longer in use. Fig.50 Maximum power in domestic water mode Warning Ensure that both flue test point plugs are in place after checking combustion. F1 F1 F1 F2 F3 F4 F1 F1 F1 F2 F3 F4 F1 F1 F1 F2 F3 F4 46 600 System 2

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600 System 2 47 7 Commissioning 7.4.3 LPG conversion procedure

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Fig.52 Combustion procedure Set Boiler to Maximum Rate Allow the combustion to stabilise. Do not insert probe to avoid ‘flooding’ the analyser. Perform Flue Integrity Combustion Check Insert the analyser probe into the air inlet test point, allowing the reading to stabilise. Is O2 ≥ 20.6% and CO2 < 0.2% ? Verify Flue Integrity Indication that products of combustion & inlet air are mixing - further investigation is required. Check all flue components are correctly assembled, fixed & supported. Check the flue & terminal are unobstructed. Is O2 ≥ 20.6% and CO2 < 0.2% ? No TURN APPLIANCE OFF ! Call 0344 871 1545 for advice. The appliance MUST NOT be commissioned until all problems are identified and resolved. Check CO & Combustion Ratio at Maximum Rate Whilst the boiler is still operating at maximum insert the analyser probe into the flue gas test point, allowing the reading to stabilise. Is CO < 350ppm and CO/CO2 ratio < 0.004 ? Verify Integrity of Seals Check all burner seals, internal flue seals, door & case seals. Replace any seals that appear unsound. Is CO < 350ppm and CO/CO2 ratio < 0.004 ? TURN APPLIANCE OFF ! Call 0344 871 1545 for advice. The appliance MUST NOT be commissioned until all problems are identified and resolved. If commissioning cannot be fully completed the appliance must be disconnected from the gas supply in accordance with the GSIUR. Note: Check & record the CO & combustion ratio at both maximum & minimum rates before calling 0344 871 1545. Yes No No Yes Yes Set Boiler to Minimum Rate Allow the combustion to stabilise. Do not insert probe to avoid ‘flooding’ the analyser. Check CO & Combustion Ratio at Minimum Rate Whilst the boiler is operating at minimum insert the analyser probe into the flue gas test point, allowing the reading to stabilise. Yes No Is CO < 350ppm and CO/CO2 ratio < 0.004 ? No Yes BOILER OPERATING SATISFACTORILY. NO FURTHER ACTION REQUIRED Ensure test points are capped, the boiler case front panel is correctly fitted & secured and all other commissioning procedures completed. Complete the ‘Benchmark’ Checklist, recording the CO & combustion ratio readings as required. PN-0000466 7 Commissioning 600 System 2 48

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7.4.4 Service settings 7 Commissioning Important This appliance is suitable for G20 gas containing up to 20% hydrogen (H2). Due to variations in the percentage of H2, the percentage of O2 may vary over time. (For example: 20% of H2 in the gas may lead to a 1.5% increase of O2 in the flue gases). Under these circumstances it is recommended to NOT adjust the gas control valve. * When using mixes that are up to 20% hydrogen H2), for calibrating the gas valve only refer to the value of O2%. 49 600 System 2

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7 Commissioning &2 PLQLPXP 1 to 8.6 Adjust the Offset setting screw located on the gas valve. Turn the screw clockwise to increase the content of CO2 and anti-clockwise to decrease it. Important Remove the Torx driver to stabilise the CO2 value if adjustment is required. * Values for G20 gas type only. For G20+20%H2 calibration of the gas valve refer to O2%. 7.4.5 Adjusting the gas valve V K Gas flow rate setting screw - 4 mm Allen key OFFSET setting screw - Torx 40 (T40) Calibration of the MAXIMUM heat input Check that the CO2 measured in the exhaust pipe, with the boiler operating at maximum heat input, is as indicated in the table entitled "Service settings". If incorrect: Put the boiler into chimney sweep high mode "H". Let the CO2 value stabilise. Fig.51 Gas valve Remove the boiler door to take measurements or make adjustments. &2 PD[LPXP 8.8 to 9.4 Important Remove the Allen key to stabilise the CO2 value if adjustment is required. Adjust the setting screw (V) located on the gas valve. Turn the screw clockwise to increase the content of CO2 and anti-clockwise to decrease it. * Values for G20 gas type only. For G20+20%H2 calibration of the gas valve refer to O2%. Calibration of the REDUCED heat input Check that the measurement in the exhaust pipe, with the boiler operating at minimum heat input, is as indicated in the table entitled "Service settings". If incorrect: Remove the Offset setting screw plug (K) using the Torx driver. The Offset setting screw is accessible after removing the Offset setting screw plug (K). Put the boiler into chimney sweep low mode. Let the CO2 value stabilise. 50 600 System 2

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7.5 Final instructions 7.5.1 Handover 1. Carefully read and complete all sections of the Benchmark Commis sioning Checklist at the rear of this publication that are relevant to the boiler and installation. These details will be required in the event of any warranty work. Important The warranty will be invalidated if the Benchmark section is in complete. 2. The publication must be handed to the user for safe keeping and each subsequent regular service visit recorded. 3. Hand over the User Quick Start Guide & Installation and Servicing Manual, giving advice on the necessity of regular servicing. 4. For IE, it is necessary to complete a "Declaration of Conformity" to indicate compliance with I.S. 813. An example of this is given in I.S. 813 "Domestic Gas Installations" . This is in addition to the Bench mark Commissioning Checklist. 5. Set the central heating and hot water temperatures to the require ments of the user. Instruct the user in the operation of the boiler and system. 6. Instruct the user in the operation of the boiler controls. 7. Demonstrate to the user the action required if a gas leak occurs or is suspected. Show them how to turn off the gas supply at the meter control, and advise them not to operate electric light or power switched, and to ventilate the property. 8. Show the user the location of the system control isolation switch, and demonstrate its operation. 9. Advise the user that they may observe a plume of vapour from the flue terminal, and that it is part of the normal operation of the boiler. Fig.53 People PN-0000333 7 Commissioning 600 System 2 51

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F1 F1 F1 F2 F3 F4 F1 F1 F1 F2 F3 F4 8 Operation 8.1 Use of the control panel 8.1.1 Browsing the menus 1. To activate the control unit, press any button. 2. To access the settings available from the menu, press the F3 key. Tab.26 Available menu options Information menu User menu Installer menu Error menu Counter menu 3. Turn the knob to select the menu or to scroll through the settings. 4. Press the F4 key to confirm selection of the required menu. 5. Turn the knob to scroll through the list of settings. Press the F4 key to confirm selection of the setting. 6. Turn the knob to modify the setting. Press the F4 key to confirm the setting has been changed. 7. Press the F1 key to return to the home screen. Important The display shows the home screen if no keys are pressed for two minutes. If this happens, the procedure needs to be repeated. Fig.54 Accessing the menu Fig.55 Scrolling through the menus and/or settings 8.1.2 Running the automatic detection function After removing or replacing a PCB accessory board (not main PCB), an auto-detect must be carried out. 1. Select the installer menu and type in the password to enter 2. Turn the knob until AD is displayed 3. Press the F4 button and -AD- appears on the display 4. Press the F4 knob again to activate the function 8.1.3 Information menu display . 1. Navigate to the Information menu 2. Press the F4 key to open the menu. 3. Turn the knob to scroll through the values. 4. Press the F1 key several times to go back to the home screen. Fig.56 Scrolling through the values Counter menu display 1. Navigate to the Counter menu. 2. Press the F4 key to open the menu. 3. Turn the knob to scroll through the values. 4. Press the F1 key several times to go back to the home screen. Fig.57 Scrolling through the values 8 Operation F1 F1 F1 F2 F3 F4 F1 F1 F1 F2 F3 F4 52 600 System 2

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8 Operation 8.2 Start-up 8.2.1 Procedure for first start-up The following information appears on the display when the boiler is electrically powered: 1. The message "INIT"" appears, indicating that the "Initialisation" phase is active (a few seconds); 2. The software version "Vxx.xx." appears (two seconds); 3. The software version for boiler settings "Pxx.xx." appears (two seconds); 4. The boiler and heating installation venting phase has started. During operation, the display shows in alternate mode "– – – – – – – –", the word “DEAIR” and the pressure value for the heating circuit. This phase lasts 6 minutes and 20 seconds, at the end the boiler is ready for operation; 5. The symbol and the "x.x" installation water pressure value appear. In the event of a power outage the procedure will be repeated from the beginning. To activate a heating request, the room thermostat must be set to a temperature above the current temperature (or open a domestic water tap.) 8.2.2 Changing the heating flow temperature 1. Use the knob to adjust the flow temperature in heating mode. Turn the knob anti-clockwise to reduce the temperature value. Turn the knob clockwise to increase the temperature value. Important With an outside sensor connected it is possible to lower the setpoint value. 2. Press the F4 key to confirm the value or wait a few seconds until the value is automatically saved. Important The flow temperature is matched automatically when using a: Weather-dependent regulator. OpenTherm regulator. Fig.58 Scrolling through the menus and/or settings F1 F1 F1 F2 F3 F4 600 System 2 53

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8 Operation 8.3 Shutdown 8.4 Degassing function The purpose of this function is to degas the heating installation. After installing the boiler, the function activates immediately when the boiler is first started up. The function automatically activates each time the boiler power supply is turned off and then on again. To start the function manually: 8.3.1 Switching off the heating and domestic hot water (DHW) Heating mode can also be disabled by turning the until the word OFF appears on the display. Important When heating mode is re-enabled check, by turning the knob, that the comfort temperature is that requested. Important Heating is disabled but the frost protection function remains activated. Domestic hot water mode can also be disabled by turning the knob anti-clockwise until the word OFF appears on the display. To switch the boiler off completely, switch off the power supply to the appliance and close the gas cock. Important In this condition, the boiler and the heating installation are not protected against frost. knob anti-clockwise Access the installer menu and enter the password. Turn the knob until “DEAIR” is displayed. Press the F4 knob and -AIR- appears on the display Press the F4 knob again to activate the function. 8.5 Frost protection It is a good idea to prevent the heating installation from draining completely, as changing the water can result in unnecessary and damaging limescale deposits from forming inside the boiler and heating elements. If the thermal installation is not intended to be used during the winter months and there is a risk of frost, we recommend mixing suitable antifreeze solutions designed for a specific purpose (e.g. propylene glycol, which contains limescale and corrosion inhibitors) into the water in the installation. The boiler's electronic control system is equipped with an "antifreeze" function for the heating system. This function activates the boiler pump when the heating system flow temperature falls below 7 °C. If the water temperature reaches 4 °C, the burner is switched on, bringing the system water to a temperature of 10 °C. When this value is reached the burner switches off and the pump continues to operate for another 3 minutes. Important The frost protection function will not work if there is no power being supplied to the boiler or if the gas supply cock is closed. 54 600 System 2

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F1 F1 F1 F2 F3 F4 9 Settings 9 Settings 9.1 Accessing the settings To display/change the list of SERVICE settings, proceed as follows: press the F3 key, the symbol on the menu bar starts to flash; turn the knob until you reach the symbol to access user settings, symbol to access installer settings, then knob to enter code 0012 turn until you reach the press the F4 key to confirm; if accessing the installer menu, use the and confirm by pressing the F4 key turn the knob until you reach the desired setting, then press the F4 key to confirm; knob; modify the value of the setting using the press F4 to confirm; press F1 to exit. Danger FOR LOW TEMPERATURE HEATING INSTALLATIONS MODIFY SETTING CP000 ACCORDING TO THE MAXIMUM FLOW TEMPERATURE. Important The factory settings for certain settings may differ based on the market the product is destined for. Fig.60 Step 2 F1 F1 F1 F2 F3 F4 9.2 List of parameters Tab.27 Table of parameters Name Description Factory value Minimum Maximum Level AP073 Average external temperature [°C] when switching from summer/winter mode (with outside sensor) 22 10 30 User AP079 Building insulation level (with outside sensor) 0: Poorly insulated building 15: Well insulated building 3 0 15 Installer CP000 Max. settable heating setpoint temperature [°C] 80 25 80 Installer CP020 Zone function 1: Enabled 0: Disabled 1 – – Installer CP210 Comfort mode heating curve offset (with outside sen sor) 15 15 90 Installer CP230 Heating curve slope (with outside sensor) 1.5 0 4 Installer CP470 Number of days required for the screed drying pro gram 0 0 30 Installer CP480 Screed drying starting temperature [°C] 20 20 50 Installer CP490 Screed drying stop temperature [°C] 20 20 50 Installer CP780 Zone control strategy selection 0: Automatic 1: Room Temp. based 2: Outdoor Temp. based 3: Outdoor & room based 0 – – Installer 600 System 2 55

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9 Settings Danger For low temperature heating installations, modify the CP000 parameter according to the maximum flow temperature. The factory settings for certain settings may differ based on the market the product is destined for. 9.2.1 Resetting factory settings 9.3 Setting the parameters Connect the outside sensor to terminal CB6 and connect the "On/Off" type room thermostat or the "Open Therm" type room unit to terminal CB7 of the connection board after having removed the jumper. Important If the heat curve is set via an OpenTherm room unit, do not set the heat curve with these parameters. The procedure for accessing the settings is the same as that described in the previous paragraph. To set the curve, change the following settings: CP000: Heating flow maximum temperature set point. CP210: comfort mode climatic curve offset from 15 to 90 (with external probe). Do not change the slope of the curve. CP230: setting of the slope of the climatic curve from 0.0 to 4.0. To reset the factory settings, modify the CN1 and CN2 settings with the data on the boiler data plate. 9.3.1 Setting the heating curve Fig.61 Outside sensor connection Fig.62 Heating curve graph Tout: temperature detected by the outside sensor (° C) SP_CH: Heating flow temperature setpoint (°C) 56 600 System 2

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F1 F1 F1 F2 F3 F4 9.4 Reading out measured values Proceed as described below to access the info menu: Press the F3 key; The symbol flashes on the display; Press the F4 key to access the INFO menu; Turn the knob to view the settings; Press the F1 key to exit. Tab.29 Read-only parameter list (not editable) Setting (read only) Description Value AM001 DHW (Domestic Hot Water) mode enabled (0: Disabled, 1: Enabled) 0/1 AM010 Pump speed (0 ÷ 100%) % AM011 Service required (0: Disabled, 1: Enabled) 0/1 AM012 Status of appliance List of statuses AM014 Sub Status of appliance List of sub-sta tuses AM015 Pump operation (0: Disabled, 1: Enabled) 0/1 Fig.63 INFO menu access 9 Settings 600 System 2 57

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9 Settings Setting (read only) Description Value AM016 Flow temperature °C AM018 Return temperature °C AM019 Actual water pressure in central heating system bar AM024 Current output of the boiler 0/100% AM027 Outside temperature °C AM036 Flue gas temperature °C AM037 Status of the 3-way valve (0: Heating, 1: DHW) 0/1 AM040 Outgoing DHW temperature check °C AM091 Season mode (0: winter, 3: summer) 0/3 AM101 Internal set point °C BM000 DHW temperature °C CM030 Current room temperature for zone °C CM120 Current operating mode in the zone (0: Disabled, 1: Enabled) 0/1 CM190 Zone ambient set point °C CM210 Outside temperature in the zone °C CM280 Zone calculated set point °C DM001 Temperature of the DHW tank °C DM002 Outgoing DHW flow speed l/min DM005 Solar system DHW temperature °C DM009 Primary operating mode (0: Programming, 1: Manual, 2: Antifreeze/Holiday) 0/1/2 DM019 DHW mode active (1: Comfort, 2: Low, 3: Holiday, 4: Antifreeze 1/2/3/4 DM029 DHW temperature set point °C GM001 Actual fan RPM rpm GM002 Actual fan RPM setpoint rpm GM003 Flame detected (0: Not detected, 1: Detected) 0/1 GM004 Gas valve (0: Open, 1: Closed, 2: Off) 0/1/2 GM007 Start-up (0: Off, 1: On) 0/1 GM008 Actual flame current measured μA GM012 Contact release signal X16 (0: No; 1: Yes) 0/1 GM013 Boiler shutdown signal input (0: Open, 1: Closed) 0/1 GM044 Reason for shutdown checked (0: None) 1. Heating Stoppage 2. DHW Stoppage 3. Awaiting burner ignition 4. Heating flow temperature above maximum value 5. Heating flow temperature above the starting value 6. Heat exchanger temperature above the starting value 7. Average heating flow temperature value above the starting value 8. Heating flow temperature above the setpoint value 9. Temperature difference between flow and return too great 10. Heating flow temperature above the shutdown value 11. Heat request before the minimum wait time between two consecutive requests 12. Shutdown caused by flame value being too low 13. Solar temperature above the shutdown value 0/13 9.4.1 Statuses and sub-statuses The STATUS is the operating phase of the boiler at the moment of display. To view the status, select the parameter AM012. The SUB-STATUS is the instantaneous operation the boiler is performing at the moment of display. To view the sub-status, select the parameter AM014. 58 600 System 2

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9 Settings Tab.30 List of statuses STATUS Standby 0 Heat request 1 Burner ignition 2 Operation in heating mode 3 Operation in domestic water mode 4 Burner off 5 Pump post circulation 6 Burner shutdown to reach the temperature setpoint 8 Temporary fault 9 Permanent fault (fault to be reset manually) 10 Chimney sweep function at minimum output 11 Chimney sweep function at maximum output in heating mode 12 Chimney sweep function at maximum output in domestic water mode 13 Manual heat request 15 Frost protection function active 16 Venting function active 17 Boiler reset in progress 19 Tab.31 List of sub-statuses SUB-STATUS Standby 0 Wait time until next ignition in heating mode 1 Pre-ventilation 13 Burner ignition signal sent to safety core 15 Burner pre-ignition 17 Burner ignition 18 Flame check 19 Fan operation during ignition attempts 20 Operation at set temperature setpoint 30 Operation at limited temperature setpoint 31 Operation at required output 32 Level 1 gradient detected 33 Level 2 gradient detected 34 Level 3 gradient detected 35 Flame protection active 36 Stabilisation time 37 Boiler start at minimum output 38 Operation in heating mode has been interrupted by a domestic hot water request. Restart from power output in which it was interrupted. 39 Post ventilation 41 Fan off 44 Output reduction due to high flue gas temperature 45 Pump post circulation 60 600 System 2 59

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F1 F1 F1 F2 F3 F4 9 Settings 9.5 Reading counters Proceed as described below to access the counter menu: Press the F3 key; The symbol flashes on the display; Turn the knob until the symbol appears, then press the F4 key to confirm; Turn the knob until you reach the required counter, then press the F4 knob until you key to confirm; To access the meters at the installer level, turn the reach the SVC symbol then press the F4 key to confirm; Use the knob to enter code 0012 and confirm by pressing the F4 key Turn the knob until you reach the required counter, then press the F4 key to confirm; press F1 to exit. Tab.32 List of counters (read only) Meters Level Description AC001 User Number of boiler power supply hours AC016 Installer Filling counter, counts the amount of filling cycles AC002 Installer Number of boiler operating hours after last maintenance operation AC003 Installer Number of boiler power supply hours after last maintenance operation AC004 Installer Failed start-up attempts after last maintenance operation AC005 User Indicative energy consumption [kW/h] in heating mode AC006 User Indicative energy consumption [kW/h] in domestic hot water (DHW) mode AC026 Installer Number of pump operating hours AC027 Installer Number of pump start-ups CLR Installer Resetting of all meters (to be confirmed by pressing the F4 key) NOTE: This parameter is only displayed if AP010 ≠ 0 DC001 Installer Total energy consumption used by domestic hot water (DHW) DC002 Installer Number of domestic hot water cycles (three-way valve switching) DC003 Installer Number of hours in domestic hot water mode (three-way valve switching) DC004 Installer Number of burner start-ups for domestic hot water mode DC005 Installer Number of burner start-up hours for domestic hot water mode GC007 User Failed start-up attempts PC001 Installer Indicative electrical energy consumption [kW/h] in heating mode PC002 Installer Number of burner start-ups for heating and domestic hot water mode PC003 Installer Number of burner start-up hours for heating and domestic hot water mode PC004 Installer Burner flame leaks Fig.64 Accessing the counter menu 60 600 System 2

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10 Maintenance 10.1 General 10 Maintenance Warning When changing components ensure that both the gas and electri cal supplies to the boiler are isolated before any work is started. When the component has been changed recommission the boiler. Always examine any seals or gaskets, replacing where necessary. The case front panel MUST seal effectively against the boiler side panels. Warning After servicing or performing any maintenance on the boiler en sure that Both flue test point plugs are in place The front cover is correctly fitted The front cover securing screws are fully tightened For reasons of safety and economy, it is recommended that the boiler is serviced annually. Servicing must be performed by a competent person in accordance with BS 7967-4. After servicing, complete the relevant Service Interval Record section of the Benchmark Commissioning Checklist at the rear of this publication. Important During routine servicing, and after any maintenance or change of part of the combustion circuit, the following must be checked:- The integrity of the complete flue system and the flue seals by checking air inlet sample to eliminate the possibility of recirculation. O2 ≥ 20.6% & CO2< 0.2% The integrity of the boiler combustion circuit and relevant seals. The operational gas inlet pressure and the gas rate. The combustion performance as described in "Check the Combustion Performance" below. Competence to carry out checking combustion performance BS 6798 "Specification for Installation & Maintenance of Gas Fired Boilers not exceeding 70 kWh" advises that:- The person carrying out a combustion measurement should have been assessed as competent in the use of a flue gas analyser and the inter pretation of the results. The flue gas analyser used should be one meeting the requirements of BS 7927 or BS-EN50379-3 and be calibrated in accordance with the an alyser manufacturers’ requirements. Competence can be demonstrated by satisfactory completion of the CPA1 ACS assessment, which covers the use of electronic portable combustion gas analysers in accordance with BS 7967, Parts 1 to 4. Check the Combustion Performance (CO/CO2 ratio) Set the boiler to operate at maximum rate. See Checking combustion - chimney sweep mode, page 45 for details. 61 600 System 2

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10 Maintenance Remove the plug from the combustion test point, insert the analyser probe and obtain the CO/CO2 ratio. This must be less than 0.004. If the combus tion reading (CO/CO2 ratio) is greater than this, and the integrity of the complete flue system and combustion circuit seals has been verified, and the inlet gas pressure and gas rate are satisfactory either:- Perform the "Standard Inspection and Maintenance" . Perform "Setting the Gas Valve" . Replace and set the gas valve. 1 2 Combustion test point Incoming air for combustion test point Warning Ensure that both flue test point plugs are in place after checking combustion. Fig.65 Flue adaptor test points PN-0000363 1 2 10.2 Maintenance message The purpose of this function is to warn the user that the boiler requires maintenance. flashes, When the letters SVC appear on the screen and the symbol the boiler requires maintenance. Contact your installer. The boiler is delivered with this function disabled. Proceed as follows to enable notifications on the display: 1. Go to the settings menu; 2. Enable setting AP010. 3. Apply the AP011 setting by entering the number of hours the boiler has been in operation (from the moment the boiler was first supplied with electric power irrespective of the number of times the burner has been switched on and off). 4. Enter the number of burner start-up hours using the AP009 parameter. 10.2.1 Service notification When the boiler needs to be serviced, a request message appears on the display. Use the automatic assistance notification for preventative maintenance to reduce interruptions to a minimum. Important Maintenance must be carried out within two months of notification. Important If the modulating thermostat is connected to the boiler, this thermostat can also display the message SERVICE. Consult the thermostat manual. Important Reset SERVICE notification after maintenance is complete. Fig.66 Accessing the maintenance message F1 F1 F1 F2 F3 F4 F1 F1 F1 F2 F3 F4 Fig.67 Resetting the displayed message 10.2.2 Resetting the displayed maintenance message Reset the displayed maintenance message once the stated maintenance service has been carried out, as described below: 1. Press the F1 key. 2. Turn the knob until the code 0012 is displayed. 3. Press the F4 key to confirm and reset the maintenance message. Important The maintenance message is only active if parameter AP010 ≠ 0. 62 600 System 2

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F1 F1 F1 F2 F3 F4 10.2.3 Resetting the upcoming maintenance message Reset an upcoming maintenance message once the intermediate maintenance service has been carried out. 1. Navigate to the Counter menu. 2. Press the F4 key to open the menu. 3. Turn the knob until the code SVC is displayed. 4. Press the F4 key to access the maintenance message. 5. Turn the knob until the code 0012 is displayed. 6. Press the F4 key to confirm.. 7. Turn the knob until the code CLR is displayed. 8. Press the F4 key for around 3 seconds, to confirm and reset the maintenance message. The display shows DONE. The maintenance message is reset. 9. Press the F1 key several times to return to the main screen. Fig.68 Resetting the upcoming message 10 Maintenance 10.3 Standard inspection and maintenance operations 10.3.1 Annual Servicing Warning Ensure that the boiler is cool. Ensure that both the gas and electri cal supplies to the boiler are isolated. Caution Always examine any seals or gaskets, replacing where necessary. Where a seal or gasket is supplied with a spare part it should be used, irrespective of the condition of the original. Use only original spare parts that are intended for use with this type of boiler. Important When performing any inspection or maintenance, personal protec tive equipment must be used where appropriate. 1. Ensure that both the gas and electrical supplies to the boiler are iso lated and that the boiler is cool. 2. Remove the case front panel and hinge down the control panel. 3. Carefully examine all seals and gaskets, replacing if necessary. Look for any evidence of leaks or corrosion and if found determine and rectify the cause. 4. Complete the relevant Service Interval Record section of the Bench mark Commissioning Checklist at the rear of this publication and then hand it back to the user. 10.3.2 Checking the water pressure In order for the boiler to operate correctly, the pressure of the water in the heating circuit, shown on the display, must be between 1.0 and 1.5 bar. If necessary, restore the water pressure as described in the chapter entitled "Filling the installation". 10.3.3 Checking the expansion vessel Check the expansion vessel and replace it if necessary. Check its pre-charge every year and restore the pressure to 1 bar if necessary. 600 System 2 63

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10 Maintenance 10.3.4 Checking the flue gas discharge and the air supply Heat the water in the boiler to a temperature of approx. 70 °C. Unscrew the plug of the flue gas measurement point (exhaust system adaptor). Measure the content of O2/CO2 in the flue gas using the measuring equipment. Compare this with the control value. 10.3.5 Checking the combustion Measure the O2/CO2 contents and the temperature of the flue gases at the flue gas measuring point. To do this, proceed as follows: The front panel must be removed to extract the siphon (A). Proceed as described below: Remove the screw (2); Remove the clip (1); Unfasten the pipe from the heat exchanger (4); Remove the siphon (3) and clean it; Replace, if necessary, all the gaskets present; Fill the siphon with water. Assembly is the reverse of the above steps. Ensure trap breather pipe is clipped as shown to the drip tray tube. Fig.69 Dismantling the siphon Verify the distances between the electrode and the burner and between 10.3.8 Electrode distances Fig.70 Electrode distance 1 8.0 ± 4.5 0.5 ± Check the entire line of flue gas pipes, in particular the tightness of the flue gas evacuation and combustion air intake connections. 10.3.7 Cleaning the siphon Check that the boiler pump venting valve is working. In the event of a leak replace the valve. 64 600 System 2 10.3.6 Checking the automatic air vent

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10 Maintenance 10.3.9 Checking the burner and cleaning the heat exchanger Proceed as described below for cleaning: 1. Isolate the unit from the power supply (disconnect the boiler from the main power supply). 2. Cut off the gas supply to the boiler. 3. Close the hydraulic cocks. 4. Remove the front panel. 5. Remove the entire air-gas unit, unscrew the screw (A) and the clip (B) located between the fan and the gas valve. 6. Remove the silencer (C). 7. Unscrew the 4 M6 locknuts (D) on the burner door. 8. Check the condition of the detection/ignition electrode. Replace the electrode if necessary. 9. Check the condition of the burner, the gasket and the insulation panel. Fig.71 Removing the air-gas system Warning Dust released from the front insulation panel and the rear insulation panel can harm your health. Clean the heat exchanger with only a soft brush and water. Avoid contact with the rear and front plate Do not use steel brushes or compressed air. Danger In the case of maintenance/disassembly of the boiler combustion circuit installed on a collective flue in positive pressure, take the necessary precautions to prevent the fumes from other boilers installed on the collective flue from entering the room where the boiler is installed. 13. 14. The burner does not require any maintenance, it is self-cleaning. Check that there are no cracks and/or other damage on the surface of the dismantled burner. If the burner is damaged, replace it. Replace the burner flange gasket. Check the front insulation panel for cracks, damage, moisture, ageing and deformation. Replace the insulation panel if in doubt. To clean the upper part of the heat exchanger (combustion chamber), use a vacuum cleaner and a brush with plastic bristles. Thoroughly clean with the vacuum cleaner again without the end piece (brush). Make sure (using a mirror, for example) that there is no visible dust residue. Vacuum up any residue. It is forbidden to clean the combustion chamber with any unauthorised chemical products and, in particular, ammonia, hydrochloric acid, sodium hydroxide (caustic soda) etc. Generously wet the surfaces to be cleaned using a manual sprayer containing a solution of water and vinegar. Do not use it on excessively hot surfaces (max. 40 °C). Wait approx. 7-8 minutes then brush the surface without rinsing it. Repeat the process. Wait another 8 minutes and then brush again. If the result is not satisfactory, repeat the operation. Rinse with water. The water will flow out of the heat exchanger through the condensate drain siphon. Wait another 20 minutes and use a powerful water jet to wash away the dirt particles. Do not aim the water jet directly at the insulating surface on the rear of the heat exchanger. To re-assemble, perform the above actions in reverse order. Caution The maximum tightening torque of the four M6 nuts (D) fastening the flange is 5.5 Nm. 10. 11. 12. 15. 16. 17. 18. 19. 20. 600 System 2 65

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10 Maintenance 10.4.1 Detection/ignition electrode replacement Replace the detection//ignition electrode in the following cases: 1. Ionisation current <4 μA. To do this, activate the "chimney sweep function" (chapter "Combustion settings") and set the boiler to the minimum power. The ionisation value is visible with setting GM008 (chapter "Reading out measured values"). 2. Electrode worn. 3. Distances out of range (chapter “Electrode distance”). To remove the electrode: Disconnect the power supply to the boiler. Cut off the gas supply to the boiler. Remove the front panel on the boiler (case) and remove the electrode pin and the earthing cable. Unscrew the 2 screws on the ignition electrode and remove it. Fit the new electrode with the gasket. To re-assemble, perform the above actions in reverse order. 10.4 Specific maintenance operations Fig.73 Remove detection/spark ignition electrode 10.4.2 Flow and return sensors There is one sensor on the flow (red wires) and one sensor on the return (blue wires). 1. After noting the position of each sensor, prise the sensor clip off the pipe and disconnect the plug. 2. Connect the plug to the new sensor and ease the clip onto the pipe in its original position. Fig.74 Remove flow and return sensors 10.4.3 Pressure Sensor 1. Drain the primary circuit and undo the nut on the pressure gauge ca pillary. 2. Ease the two retaining tabs holding the pressure gauge bracket away and remove the bracket. 3. Remove the gauge assembly. 4. Examine the sealing washer on the pressure gauge capillary, re place if necessary. 5. Reassemble in reverse order with the new pressure gauge. Fig.77 Remove pressure sensor 66 600 System 2

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10 Maintenance Fig.79 Remove safety pressure relief valve 1. Drain the primary circuit. 2. Disconnect the discharge pipe from the valve and remove the seal ing grommet. 3. Using a suitable hexagon key undo the grub screw sufficiently to re lease the valve. 4. Note the orientation of the valve, rotate it and withdraw it from the manifold. 5. Fit the new valve and ‘O’ ring seal and set to the previously noted orientation. Tighten the grub screw. 6. Reconnect the discharge pipe ensuring the sealing grommet is in place to maintain the integrity of the case seal. 10.4.4 Safety pressure relief valve 600 System 2 67

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F1 F1 F1 F2 F3 F4 Before replacing the expansion vessel, proceed as detailed below: 1. Disconnect the power supply to the boiler. 2. Close the gas cock. 3. Close the main domestic water tap. 4. Close the heating system return and flow cocks. 5. Open the boiler drain cock. 10 Maintenance The expansion vessel is inside the boiler on the side, to the right. After replacing the main board, power up the boiler electrically. Parameters CN1 and CN2 will automatically appear on the display. Modify the parameters with the data shown on the serial number plate: Turn knob to modify the parameters; Press the F4 key to store the set value. Parameters CN1 and CN2 can also be accessed from the main menu to carry out the replacement. Press the two external buttons on the control panel simultaneously for about 40 seconds. Caution Please note that resetting the CN1 and CN2 settings with data on the data plate deletes any previous setting. If changing the gas, for example, remember to set the correct calibration for the gas valve. 10.4.5 Pump - replacement Fig.82 Modifying the parameters Warning Take precautions to protect other components from water damage when removing the pump and auto air vent. 1. Hinge the control box down. 2. Close the flow and return isolation taps and drain the boiler primary circuit. 3. Disconnect the electrical plugs from the pump motor. 4. Prise off the securing clip that is holding the pump return pipe in po sition. Pull away the pipe. 5. Pull out the securing clip that is holding the pump body to the hy draulic inlet assembly. 6. Prise off the securing clip and disconnect the braided hose from the pump body, taking care as water may still be in the hose. 7. Remove the screws securing the pump to the boiler bottom panel. 8. The pump should now be able to be remove. 9. Pull out the securing clip and remove the automatic air vent, trans fering it to the new pump body. 10. Examine all ‘O’ ring seals, replace if necessary and reassemble in 10.4.6 Replacing the expansion vessel Fig.81 Remove pump 10.4.7 Replacing the PCB reverse order. 68 600 System 2

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600 System 2 69 10.4.8 Setting an uncalibrated gas valve 10 Maintenance

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11 Troubleshooting 70 600 System 2 The codes on the display indicate two types of fault: temporary and permanent. The first item shown on the display is a letter followed by a two-digit number. The letter indicates the type of fault: temporary (H) or permanent (E). The number indicates the group in which the fault that has occurred is classified according to its impact on safe and reliable operation. The second item shown flashes alternately with the first and consists of a two-digit number that indicates the type of fault which has occurred (see the following fault tables). TEMPORARY FAULT (A/H.x.x.) A temporary fault is shown on the display by the letter “A” or “H” followed by a number (group). A temporary fault is a type of fault that does not cause a permanent stoppage of the boiler. It has the following characteristics: A: The appliance continues to operate. It disappears as soon as the cause has been resolved. H: Disappears when the error condition is removed, in some cases even after 10 minutes. PERMANENT FAULT (E.x.x) A permanent fault is shown on the display by the letter "E" followed by a number (group). Press the RESET button for one second. If faults are shown frequently, contact our authorised technical assistance centre. E: Stoppage, reset required.. 11.2 Error codes Tab.33 List of temporary (volatile) faults BOILER DISPLAY DESCRIPTION OF TEMPORARY FAULTS CAUSE Check / Solution Group code Specific code A.00 .34 Outdoor temperature sensor expected but not de tected OUTDOOR SENSOR NOT DETECTED Connect the outdoor sensor Outdoor sensor is not connected correctly A.02 .06 Low water pressure A.02 .18 OBD error CONFIGURATION ERROR Re-enter the CN1 and CN2 values, check the infor mation shown on the data plate A.02 .36 Functional device disconnected SCB BOARD NOT DETECTED Check the connection and the connectors Faulty SCB, replace the board A.02 .37 Passive functional device disconnected SCB BOARD NOT DETECTED Check the connection and the connectors Faulty SCB, replace the board A.02 .45 Connection error SCB BOARD NOT DETECTED Carry out the auto-detect function A.02 .46 Device priority error SCB BOARD NOT DETECTED Carry out the auto-detect function A.02 .48 Unit function configuration error SCB BOARD NOT DETECTED Carry out the auto-detect function A.02 .49 Failed node initialisation SCB BOARD NOT DETECTED Carry out the auto-detect function A.02 .54 Open Therm bus power supply error Replace the CU-GH board A.02 .55 Incorrect or missing serial number Replace the CU-GH board 11 Troubleshooting 11.1 Temporary and permanent faults Check the system pressure and restore it Check the pressure of the expansion vessel Check for any sys tem / boiler leaks

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11 Troubleshooting 600 System 2 71 BOILER DISPLAY DESCRIPTION OF TEMPORARY FAULTS CAUSE Check / Solution Group code Specific code A.02 .76 Internal memory reserved for full customisation of settings. No further changes can be made CONFIGURATION ERROR Re-enter the values CN1 and CN2 Replace the CU-GH board H.00 .42 Pressure sensor open/faulty RESET PROCEDURE IN PROGRESS No action required H.01 .00 Temporary communication failure between gas valve and boiler PCB. MAIN PCB ERROR Configure CN1/CN2 Replace the main PCB H.01 .05 Maximum temperature difference value between flow and return reached. INSUFFICIENT CIRCULATION Check the boiler/installation circulation Activate a manual venting cycle Check the installation pressure OTHER CAUSES Check the cleanliness of the exchanger Check the operation of the temperature sensors Check the connection of the temperature sensors H.01 .08 Flow temperature increase in heating mode too quick. Temporary stoppage of 10 minutes. INSUFFICIENT CIRCULATION Check the boiler/installation circulation Activate a manual venting cycle Check the installation pressure OTHER CAUSES Check the cleanliness of the exchanger Check the operation of the temperature sensors Check the temperature sensor connection H.01 .14 Maximum flow temperature value reached. INSUFFICIENT CIRCULATION Check the boiler/installation circulation Activate a manual venting cycle H.01 .18 No water circulation (temporary). INSUFFICIENT CIRCULATION Check the installation pressure Activate a manual venting cycle Check the operation of the pump Check the boiler/installation circulation TEMPERATURE SENSOR ERROR Check the operation of the temperature sensors Check the temperature sensor connection H.01 .21 Flow temperature increase in domestic water mode too quick. Temporary stoppage of 10 mi nutes. INSUFFICIENT CIRCULATION Check the installation pressure Activate a manual venting cycle Check the operation of the pump Check the boiler/installation circulation TEMPERATURE SENSOR ERROR Check the operation of the temperature sensors Check the connection of the temperature sensors H.02 .00 Reset in progress H.02 .02 Waiting for configuration settings to be entered (CN1,CN2). CN1/CN2 CONFIGURATION MISSING Configure CN1/CN2 H.02 .03 Configuration settings (CN1,CN2) not entered correctly. Check configuration CN1/CN2 Configure CN1/CN2 correctly H.02 .04 PCB settings cannot be read. MAIN PCB ERROR Configure CN1/CN2 Replace the main PCB H.02 .05 Setting memory not compatible with the boiler PCB type - H.02 .07 Low pressure in heating circuit (permanently) Check the system pressure and restore it Check the pressure of the expansion vessel Check for any sys tem / boiler leaks

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11 Troubleshooting 72 600 System 2 BOILER DISPLAY DESCRIPTION OF TEMPORARY FAULTS CAUSE Check / Solution Group code Specific code H.02 .09 Partial stoppage of the boiler SIGNAL INDICATING BLOCKING INPUT ACTIVE OR FROST PROTECTION ACTIVE External cause: remove the cause Parameter configuration error: check parameters Faulty wiring connection: check wiring H.02 .10 Complete stoppage of the boiler BLOCKING INPUT SIGNAL (WITHOUT FROST PROTECTION) External cause: remove the cause Parameter configuration error: check parameters Faulty wiring connection: check wiring H.02 .12 Opening of the control unit input signal contact from the external device - H.02 .38 No water hardness Not possible H.02 .70 External unit heat recovery test failed SCB-09 board error H.03 .00 No identification data for boiler safety device. MAIN PCB ERROR Replace the main PCB H.03 .01 Communication failure in comfort circuit (internal fault in boiler PCB). MAIN PCB ERROR Replace the main PCB H.03 .02 Temporary flame loss ELECTRODE PROBLEM Check the electrode connection and wiring Check the condition of the electrode GAS SUPPLY Check the gas supply pressure Check the gas valve calibration FLUE GAS PIPES Check the pipes and the terminal H.03 .05 Power supply voltage too low Check the mains voltage H.03 .17 Periodic safety check in progress - H.03 .54 Temporary flame loss Shutdown due to the power supply voltage being too low ELECTRODE PROBLEM Check the electrode electrical connections Check the condition of the electrode GAS SUPPLY Check the gas inlet pressure Check the gas valve calibration FLUE GAS EXHAUST PIPE Check the air intake and flue gas exhaust terminal Check the power supply voltage Tab.34 List of permanent faults (boiler stoppage, reset required) SHOWN ON BOILER DISPLAY DESCRIPTION OF PERMANENT FAULTS THAT REQUIRE RESETTING CAUSE Check / Solution Group code Specific code E.00 .04 Return temperature sensor disconnected SENSOR/CONNECTION PROBLEM Check the operation of the temperature sensor Check the connection of the sensor/PCB E.00 .05 Return temperature sensor short circuited SENSOR/CONNECTION PROBLEM Check the operation of the sensor Check the sensor/PCB connection E.00 .06 Return sensor expected but not detected - E.00 .07 The difference in return temperature is too great - E.00 .16 DHW tank temperature sensor not connected SENSOR OPEN Check the operation of the sensor Check the sensor/PCB connection E.00 .17 DHW tank temperature sensor short-circuited SENSOR CLOSED Check the operation of the sensor Check the sensor/PCB connection

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11 Troubleshooting 600 System 2 73 SHOWN ON BOILER DISPLAY DESCRIPTION OF PERMANENT FAULTS THAT REQUIRE RESETTING CAUSE Check / Solution Group code Specific code E.00 .20 The flue gas temperature sensor has short- circuited or measured a temperature below the range - E.00 .21 The flue gas temperature sensor has short- circuited or measured a temperature above the range - E.01 .04 Flame loss detected five times in 24 hours (with burner on) GAS SUPPLY Check the gas supply pressure Check the gas valve calibration Check the air intake and flue gas exhaust terminal Check the power supply voltage E.01 .12 Temperature measured by return sensor greater than flow temperature SENSOR/CONNECTION PROBLEM Check that the sensors are positioned the correct way round Check that the flow sensor is in the cor rect position Check the return temperature in the boiler Check the operation of the sensors E.01 .17 No water circulation (permanent) INSUFFICIENT CIRCULATION Check the installation pressure Activate a manual venting cycle Check the operation of the pump Check the boiler/installation circulation SENSOR ERROR Check the operation of the temperature sensors Check the connection of the temperature sensors E.01 .20 Maximum flue gas temperature reached EXCHANGER ON FLUE GAS SIDE BLOCKED Check the cleanliness of the exchanger E.02 .13 Stoppage input for the device external environ ment control unit - E.02 .15 External PCB communication timeout - E.02 .17 Permanent communication failure between gas valve and boiler PCB MAIN PCB ERROR Check for any electromagnetic interference Replace the main PCB E.02 .35 Critical safety device disconnected COMMUNICATION FAULT Carry out the auto-detect function E.02 .47 Connection to external device unsuccessful ELECTRICAL CONNECTION ERROR Possible cancellation, carry out the auto-detect func tion or re-enter the CN code E.04 .00 Level 5 safety settings incorrect BOILER PCB FAULT Replace the PCB E.04 .01 Flow temperature sensor short circuited SENSOR/CONNECTION PROBLEM Check the sensor/PCB connection Check the operation of the sensor E.04 .02 Flow temperature sensor disconnected SENSOR/CONNECTION PROBLEM Check the sensor/PCB connection Check the operation of the sensor E.04 .03 Maximum flow temperature exceeded INSUFFICIENT CIRCULATION Check the boiler/installation circulation Activate a manual venting cycle Check the operation of the sensors E.04 .07 Difference between the temperature values de tected by flow sensors 1 and 2 -

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74 600 System 2 11 Troubleshooting SHOWN ON BOILER DISPLAY DESCRIPTION OF PERMANENT FAULTS THAT REQUIRE RESETTING CAUSE Check / Solution Group code Specific code E.04 .08 Maximum safe temperature value reached INSUFFICIENT CIRCULATION Check the pressure in the installation Switch on the manual degassing function Check that the pump is working Check the circulation in the boiler/installation OTHER POSSIBLE CAUSES Check the safety thermostat connection Check that the safety thermostat is working correctly E.04 .09 Difference between the temperature values de tected by flue gas sensors 1 and 2 - E.04 .10 Burner failed to ignite after 4 attempts GAS SUPPLY Check the gas supply pressure Check the gas valve electrical connection Check the gas valve calibration Check the operation of the gas valve ELECTRODE PROBLEM Check the electrode electrical connections Check the electrode condition OTHER CAUSES Check the operation of the fan Check the condition of the flue gas exhaust (block ages) E.04 .11 VPS gas valve test failed - E.04 .12 Ignition failure for monitoring parasitic flame Check the ground circuit Check the power supply voltage E.04 .13 Fan blade blocked FAN/PCB PROBLEM Check the PCB-fan connection Replace the air-gas unit E.04 .14 The temperature difference between the set point and the burner varies more than 60 s compared to the GVC configuration - E.04 .15 Flue gas exhaust pipe blocked - E.04 .17 Fault in gas valve control circuit MAIN PCB ERROR Replace the main PCB E.04 .18 The flow temperature measured is lower than the minimum temperature defined by the GVC setting - E.04 .19 Mass flow rate sensor communication error - E.04 .20 Mass flow rate sensor maximum deviation - E.04 .21 Difference detected between the burner 1 and 2 temperature sensors Not possible E.04 .23 Gas valve check valve internal stoppage - E.04 .24 Gas family not detected during the automatic de tection function Not possible E.04 .54 Fault in gas valve control circuit Check the wiring on the gas valve Replace the gas valve or PCB Important When connecting a Room Unit/Control Unit to the boiler, the code “254” is always shown in the event of a fault.. Read the fault code shown on the boiler display.

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Warning Only qualified professionals are authorised to work on the boiler and the heating system. Proceed as follows to disassemble the boiler: 1. Switch off the boiler. 2. Disconnect the power supply to the boiler. 3. Close the gas valve to the boiler. 4. Close the inlet cock for domestic cold water in the boiler. 5. Tap domestic water by opening a cock to relieve pressure from the domestic water circuit. 6. Drain the heating installation. Warning If the boiler was in operation, wait for the water contained in the heating installation to cool down. 7. Remove the pipe connecting the boiler to the chimney and close the connection with a plug. 8. Unscrew the hydraulic and gas connections in the lower part of the boiler. Warning Moving the boiler is a job for two people. 12.2 Recommissioning Warning Only qualified professionals are authorised to work on the boiler and the heating system. Should you need to recommission the boiler, follow the instructions for disassembly in the reverse order. 12 Decommissioning 12.1 Disassembly 12 Decommissioning 13 Disposal 13 Disposal 13.1 Disposal and recycling The appliance is composed of multiple components made from various different materials, such as steel, copper, plastic, fibreglass, aluminium, rubber, etc.. These materials may be highly pollutant. This means that the boiler must be disposed of correctly by contacting staff at the nominated disposal facility or by taking it to a centre that is authorised to dispose of bulky waste (domestic appliances). Warning Removal and disposal of the boiler must be carried out by a qualified installer in accordance with local and national regulations. Fig.83 Recycling MW-3000179-03 Fig.84 Cutting the power supply

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www.centralheating.co.uk www.hhic.co.uk Benchmark Commissioning & Warranty Validation Service Record It is a requirement that the boiler is installed and commissioned to the manufacturers’ instructions and the data fields on the commissioning checklist completed in full. To instigate the boiler warranty the boiler needs to be registered with the manufacturer within one month of the installation. The warranty rests with the end-user (consumer), and they should be made aware it is ultimately their responsibility to register with the manufacturer, within the allotted time period. It is essential that the boiler is serviced in line with the manufacturers’ recommendations, at least annually. This must be carried out by a competent Gas Safe registered engineer. The service details should be recorded on the Benchmark Service and Interim Boiler Work Record and left with the householder. Failure to comply with the manufacturers’ servicing instructions and requirements will invalidate the warranty. This Commissioning Checklist is to be completed in full by the competent person who commissioned the boiler as a means of demonstrating compliance with the appropriate Building Regulations and then handed to the customer to keep for future reference. Failure to install and commission according to the manufacturers’ instructions and complete this Benchmark Commissioning Checklist will invalidate the warranty. This does not affect the customer’s statutory rights. © Heating and Hotwater Industry Council (HHIC)

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© Heating and Hotwater Industry Council (HHIC) www.centralheating.co.uk GAS BOILER SYSTEM COMMISSIONING CHECKLIST & WARRANTY VALIDATION RECORD Address: Boiler make and model: Boiler serial number: Commissioned by (PRINT NAME): Gas Safe registration number: Company name: Telephone number: Company email: Company address: Commissioning date: Heating and hot water system complies with the appropriate Building Regulations? Yes Boiler Plus requirements (tick the appropriate box(s)) Boiler Plus option chosen for combination boiler in ENGLAND Weather compensation Smart thermostat with automisation and optimisation Load compensation Flue Gas Heat Recovery Time and temperature control to hot water Cylinder thermostat and programmer/timer Combination boiler Zone valves pre-existing Fitted Not required Thermostatic radiator valves pre-existing Fitted Not required Automatic bypass to system pre-existing Fitted Not required pre-existing Fitted Not required Water quality instructions Yes What system cleaner was used? Brand: Product: What inhibitor was used? Brand: Product: pre-existing Fitted Not required CENTRAL HEATING MODE measure and record (as appropriate) Gas rate (for combination boilers complete DHW mode gas rate) m3/hr or ft3/hr Central heating output left at factory settings? Yes No If no, what is the maximum central heating output selected? kW Dynamic gas inlet pressure mbar °C Central heating return temperature °C System correctly balanced/rebalanced? Yes COMBINATION BOILERS ONLY Is the installation in a hard water area (above 200ppm)? Yes No Water scale reducer/softener pre-existing Fitted Not required Brand: Product: Yes No If yes- DHW expansion vessel pre-existing Fitted Not required Pressure reducing valve pre-existing Fitted Not required DOMESTIC HOT WATER MODE Measure and record Gas rate m3/hr or ft3/hr Dynamic gas inlet pressure at maximum rate mbar Cold water inlet temperature °C Hot water has been checked at all outlets Yes Temperature °C CONDENSATE DISPOSAL The condensate drain has been installed in accordance with the manufacturers’ instructions and/or BS5546/BS6798 Yes Point of termination Internal External (only where internal termination impractical) Method of disposal Gravity Pumped ALL INSTALLATIONS Record the following At max rate: CO ppm CO2 % CO/CO2 Ratio At min rate (where possible) CO ppm CO2 % CO/CO2 Ratio instructions, and readings are correct? Yes The operation of the boiler and system controls have been demonstrated to and understood by the customer Yes The manufacturers’ literature, including Benchmark Checklist and Service Record, has been explained and left with the customer Yes Commissioning Engineer’s signature Customer’s signature Time, temperature control and boiler interlock provided for central heating and hot water Yes

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© Heating and Hotwater Industry Council (HHIC) www.centralheating.co.uk SERVICE & INTERIM BOILER WORK RECORD It is recommended that your boiler and heating system are regularly serviced and maintained, in line with manufacturers’ instructions, and that the appropriate service / interim work record is completed. Service provider When completing a service record (as below), please ensure you have carried out the service as described in the manufacturers’ instructions. Always use the SERVICE/INTERIM WORK ON BOILER delete as appropriate Date: Engineer name: Company name: Telephone No: Gas Safe registration No: Max rate CO ppm CO² % CO/CO² Min rate CO ppm CO² % CO/CO² undertaken in accordance with manufacturers’ instructions, and readings are correct?” yes Gas rate: m3/h OR ft3/h delete as appropriate Yes No System inhibitor concentration has been checked and appropriate action taken, in accordance with BS 7593 and boiler manufacturers’ instructions. * yes n/a Comments: Signature: instructions and BS 7593. It is only acceptable to not have undertaken this if the service engineers attendance visit was in between annual services to attend a non-water facing component. instructions and BS 7593. It is only acceptable to not have undertaken this if the service engineers attendance visit was in between annual services to attend a non-water facing component. instructions and BS 7593. It is only acceptable to not have undertaken this if the service engineers attendance visit was in between annual services to attend a non-water facing component. instructions and BS 7593. It is only acceptable to not have undertaken this if the service engineers attendance visit was in between annual services to attend a non-water facing component. instructions and BS 7593. It is only acceptable to not have undertaken this if the service engineers attendance visit was in between annual services to attend a non-water facing component. instructions and BS 7593. It is only acceptable to not have undertaken this if the service engineers attendance visit was in between annual services to attend a non-water facing component. SERVICE/INTERIM WORK ON BOILER delete as appropriate Date: Engineer name: Company name: Telephone No: Gas Safe registration No: Max rate CO ppm CO² % CO/CO² Min rate CO ppm CO² % CO/CO² undertaken in accordance with manufacturers’ instructions, and readings are correct?” yes Gas rate: m3/h OR ft3/h delete as appropriate Yes No System inhibitor concentration has been checked and appropriate action taken, in accordance with BS 7593 and boiler manufacturers’ instructions. * yes n/a Comments: Signature: SERVICE/INTERIM WORK ON BOILER delete as appropriate Date: Engineer name: Company name: Telephone No: Gas Safe registration No: Max rate CO ppm CO² % CO/CO² Min rate CO ppm CO² % CO/CO² undertaken in accordance with manufacturers’ instructions, and readings are correct?” yes Gas rate: m3/h OR ft3/h delete as appropriate Yes No System inhibitor concentration has been checked and appropriate action taken, in accordance with BS 7593 and boiler manufacturers’ instructions. * yes n/a Comments: Signature: SERVICE/INTERIM WORK ON BOILER delete as appropriate Date: Engineer name: Company name: Telephone No: Gas Safe registration No: Max rate CO ppm CO² % CO/CO² Min rate CO ppm CO² % CO/CO² undertaken in accordance with manufacturers’ instructions, and readings are correct?” yes Gas rate: m3/h OR ft3/h delete as appropriate Yes No System inhibitor concentration has been checked and appropriate action taken, in accordance with BS 7593 and boiler manufacturers’ instructions. * yes n/a Comments: Signature: SERVICE/INTERIM WORK ON BOILER delete as appropriate Date: Engineer name: Company name: Telephone No: Gas Safe registration No: Max rate CO ppm CO² % CO/CO² Min rate CO ppm CO² % CO/CO² undertaken in accordance with manufacturers’ instructions, and readings are correct?” yes Gas rate: m3/h OR ft3/h delete as appropriate Yes No System inhibitor concentration has been checked and appropriate action taken, in accordance with BS 7593 and boiler manufacturers’ instructions. * yes n/a Comments: Signature: SERVICE/INTERIM WORK ON BOILER delete as appropriate Date: Engineer name: Company name: Telephone No: Gas Safe registration No: Max rate CO ppm CO² % CO/CO² Min rate CO ppm CO² % CO/CO² undertaken in accordance with manufacturers’ instructions, and readings are correct?” yes Gas rate: m3/h OR ft3/h delete as appropriate Yes No System inhibitor concentration has been checked and appropriate action taken, in accordance with BS 7593 and boiler manufacturers’ instructions. * yes n/a Comments: Signature:

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600 System 2 79 © Heating and Hotwater Industry Council (HHIC) www.centralheating.co.uk SERVICE & INTERIM BOILER WORK RECORD It is recommended that your boiler and heating system are regularly serviced and maintained, in line with manufacturers’ instructions, and that the appropriate service / interim work record is completed. Service provider When completing a service record (as below), please ensure you have carried out the service as described in the manufacturers’ instructions. Always use the SERVICE/INTERIM WORK ON BOILER delete as appropriate Date: Engineer name: Company name: Telephone No: Gas Safe registration No: Max rate CO ppm CO² % CO/CO² Min rate CO ppm CO² % CO/CO² undertaken in accordance with manufacturers’ instructions, and readings are correct?” yes Gas rate: m3/h OR ft3/h delete as appropriate Yes No System inhibitor concentration has been checked and appropriate action taken, in accordance with BS 7593 and boiler manufacturers’ instructions. * yes n/a Comments: Signature: instructions and BS 7593. It is only acceptable to not have undertaken this if the service engineers attendance visit was in between annual services to attend a non-water facing component. instructions and BS 7593. It is only acceptable to not have undertaken this if the service engineers attendance visit was in between annual services to attend a non-water facing component. instructions and BS 7593. It is only acceptable to not have undertaken this if the service engineers attendance visit was in between annual services to attend a non-water facing component. instructions and BS 7593. It is only acceptable to not have undertaken this if the service engineers attendance visit was in between annual services to attend a non-water facing component. instructions and BS 7593. It is only acceptable to not have undertaken this if the service engineers attendance visit was in between annual services to attend a non-water facing component. instructions and BS 7593. It is only acceptable to not have undertaken this if the service engineers attendance visit was in between annual services to attend a non-water facing component. SERVICE/INTERIM WORK ON BOILER delete as appropriate Date: Engineer name: Company name: Telephone No: Gas Safe registration No: Max rate CO ppm CO² % CO/CO² Min rate CO ppm CO² % CO/CO² undertaken in accordance with manufacturers’ instructions, and readings are correct?” yes Gas rate: m3/h OR ft3/h delete as appropriate Yes No System inhibitor concentration has been checked and appropriate action taken, in accordance with BS 7593 and boiler manufacturers’ instructions. * yes n/a Comments: Signature: SERVICE/INTERIM WORK ON BOILER delete as appropriate Date: Engineer name: Company name: Telephone No: Gas Safe registration No: Max rate CO ppm CO² % CO/CO² Min rate CO ppm CO² % CO/CO² undertaken in accordance with manufacturers’ instructions, and readings are correct?” yes Gas rate: m3/h OR ft3/h delete as appropriate Yes No System inhibitor concentration has been checked and appropriate action taken, in accordance with BS 7593 and boiler manufacturers’ instructions. * yes n/a Comments: Signature: SERVICE/INTERIM WORK ON BOILER delete as appropriate Date: Engineer name: Company name: Telephone No: Gas Safe registration No: Max rate CO ppm CO² % CO/CO² Min rate CO ppm CO² % CO/CO² undertaken in accordance with manufacturers’ instructions, and readings are correct?” yes Gas rate: m3/h OR ft3/h delete as appropriate Yes No System inhibitor concentration has been checked and appropriate action taken, in accordance with BS 7593 and boiler manufacturers’ instructions. * yes n/a Comments: Signature: SERVICE/INTERIM WORK ON BOILER delete as appropriate Date: Engineer name: Company name: Telephone No: Gas Safe registration No: Max rate CO ppm CO² % CO/CO² Min rate CO ppm CO² % CO/CO² undertaken in accordance with manufacturers’ instructions, and readings are correct?” yes Gas rate: m3/h OR ft3/h delete as appropriate Yes No System inhibitor concentration has been checked and appropriate action taken, in accordance with BS 7593 and boiler manufacturers’ instructions. * yes n/a Comments: Signature: SERVICE/INTERIM WORK ON BOILER delete as appropriate Date: Engineer name: Company name: Telephone No: Gas Safe registration No: Max rate CO ppm CO² % CO/CO² Min rate CO ppm CO² % CO/CO² undertaken in accordance with manufacturers’ instructions, and readings are correct?” yes Gas rate: m3/h OR ft3/h delete as appropriate Yes No System inhibitor concentration has been checked and appropriate action taken, in accordance with BS 7593 and boiler manufacturers’ instructions. * yes n/a Comments: Signature:

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80 600 System 2 14 Appendix 14.1 Product fiche - System boilers

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14 Appendix 600 System 2 81 14.2 Package fiche - boilers

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82 600 System 2 14 Appendix

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© Copyright All technical and technological information contained in these technical instructions, as well as any drawings and technical descriptions supplied, remain our property and shall not be multiplied without our prior consent in writing. Subject to alterations.

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Baxi Customer Support 0344 871 1545 Opening hours Monday - Friday, 8.00am-6.00pm Weekends and Bank Holidays, 8.30am-2.00pm Please note calls may be recorded for training and monitoring purposes baxi.co.uk Register now to activate your warranty: www.baxi.co.uk/registration For the warranty to be maintained, please make sure... Benchmark checklist is completed Warranty is registered within 30 days The boiler has an annual service 1 2 3 For full terms and conditions, visit www.baxi.co.uk/terms. Failure to adhere to terms and conditions will void your manufacturer’s warranty. Baxi Brooks House, Coventry Road, Warwick, CV34 4LL Please ensure the boiler is installed in accordance with these installation instructions and that you adhere to the Building Regulations. e&oe All descriptions and illustrations provided in this document have been carefully prepared but we reserve the right to make changes and improvements in our products which may affect the accuracy of the information contained in this leaflet. All goods are sold subject to our standard Conditions of Sale which are available on request. 7801992 - 03 (4/23)

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