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Инструкция Baxi Instruction Baxi Platinum plus System installation manual
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Installation and Service Manual Gas Fired Wall Mounted Condensing System Boiler en United Kingdom 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. Platinum+ 32 System
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2 © Baxi Heating UK Ltd 2020 © Baxi Heating UK Ltd 2020 All rights reserved. No part of this publication may be reproduced or transmitted in any form or by any means, or stored in any retrieval system of any nature (including in any database), in each case whether electronic, mechanical, recording or otherwise, without the prior written permission of the copyright owner, except for permitted fair dealing under Copyrights, Designs and Patents Act 1988. Applications for the copyright owner’s permission to reproduce or make other use of any part of this publication should be made, giving details of the proposed use, to the following address: The Company Secretary, Baxi Heating UK Limited, Brooks House, Coventry Road, Warwick. CV34 4LL Full acknowledgement of author and source must be given. WaRNiNG: Any person who does any unauthorised act in relation to a copyright work may be liable to criminal prosecution and civil claims for damages. 0085 ISO 9001 FM 00866 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 reference. Installers are required to carry out installation, commissioning and servicing 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 information. Building Regulations and the Benchmark Commissioning Checklist Building Regulations (England & Wales) require notification of the installation of a heating appliance to the relevant Local Authority Building Control Department. From 1 April 2005 this can be achieved via a Competent Persons Self Certification Scheme as an option to notifying the Local Authority directly. Similar arrangements will follow for Scotland and will apply in Northern Ireland from 1 January 2006. The Health & Safety Executive operates the ‘Gas Safe Register’, a self-certification scheme for gas heating appliances. These arrangements represent a change from the situation whereby compliance with Building Regulations was accepted as being demonstrated by completion of the Benchmark Logbook (which was then left on site with the customer). With the introduction of Self Certification Schemes, the Benchmark Logbook is being withdrawn. However, a similar document in the form of a commissioning checklist and service interval record is incorporated at the back of these instructions. 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 installation and commissioning of central heating systems in the UK and to encourage the regular servicing of all central heating systems to ensure safety and efficiency. Building Regulations require that installations should comply with manufacturer'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 opposite gives guidance for installers on the process necessary to ensure compliance with Building Regulations. Warning 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. Natural Gas Baxi Platinum+ 32 System G.C.No 41 470 95
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3 installer Notification Guidelines © Baxi Heating UK Ltd 2020 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
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4 Legislation © Baxi Heating UK Ltd 2020 Codes of Practice - refer to the most recent version This company declare that no substances harmful to health are contained in the appliance or used during appliance manufacture. The appliance is suitable only for installation in GB and iE and should be installed in accordance with the rules in force, and only used in a suitably ventilated location. In GB, the installation must be carried out by a Gas Safe Registered Installer. It must be carried out in accordance with the relevant requirements of the: • Gas Safety (Installation & Use) Regulations. • The appropriate Building Regulations either The Building Regulations, The Building Regulations (Scotland), Building Regulations (Northern Ireland). • The Water Fittings Regulations or Water Byelaws in Scotland. • The Current I.E.E. Wiring Regulations. Where no specific instructions are given, reference should be made to the relevant British Standard Code of Practice. In IE, the installation must be carried out by a competent Person and installed in accordance with the current edition of I.S. 813 ‘Domestic Gas Installations’, the current Building Regulations and reference should be made to the current ETCI rules for electrical installation. all systems must be thoroughly flushed and treated with inhibitor (see section 6.2). in GB the following Codes of Practice apply: 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 14336 Installation & commissioning of water based heating systems. BS 6798 Installation of gas fired hot water boilers. BS 5440 Part 1 Flues. BS 5440 Part 2 Ventilation. BS 7074 Expansion vessels and ancillary equipment for sealed water systems. BS 7593 Treatment of water in domestic hot water central heating systems. in iE the following Codes of Practice apply: Standard Scope I.S. 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 14336 Installation & commissioning of water based heating systems. BS 7074 Expansion vessels and ancillary equipment for sealed water systems. BS 7593 Treatment of water in domestic hot water central heating systems. iMPORTaNT - installation, Commissioning, Service & Repair This appliance must be installed in accordance with the manufacturer’s instructions and the regulations in force. Read the instructions fully before installing or using the appliance. In GB, this must be carried out by a competent person as stated in the Gas Safety (Installation & Use) Regulations. Definition of competence: A person who works for a Gas Safe registered company and holding current certificates in the relevant ACS modules, is deemed competent. All Gas Safe registered engineers carry an ID card with their licence number and a photograph. You can check your engineer is registered by telephoning 0800 408 5500 or online at www.gassaferegister.co.uk In IE, this must be carried out by a competent person as stated in I.S. 813 “Domestic Gas Installations”. The addition of anything that may interfere with the normal operation of the appliance without express written permission from the manufacturer or his agent could invalidate the appliance warranty. In GB this could also infringe the Gas Safety (Installation and Use) Regulations. Warning - Check the information on the data plate is compatible with local supply conditions. Safety, Performance & Quality This boiler has been assessed by an appropriate Notified Body and shown to meet the requirements of all relevant 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. For GB/IE only.
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5 Safe Manual Handling © Baxi Heating UK Ltd 2020 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 shoulders, arms and hands. Health & Safety is the responsibility of EVERYONE. There is no ‘safe’ limit for one man - 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 unobstructed. 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 possible. Where possible transport the boiler using a sack truck or other suitable trolley. 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 recommended lift points. Remember The circumstances of each installation are different. Always assess the risks associated with handling and lifting according to the individual conditions. If at any time when installing the boiler you feel that you may have injured 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 !!
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6 © Baxi Heating UK Ltd 2020 CONTENTS 1.0 introduction 7 2.0 General Layout 8 3.0 appliance Operation 9 4.0 Technical Data 10 5.0 Dimensions and Fixings 12 6.0 System Details 13 7.0 Site Requirements 15 8.0 Flue Options 20 9.0 installation 22 10.0 Commissioning 27 11.0 Completion 30 12.0 Servicing 31 13.0 Changing Component 33 14.0 Setting the Gas Valve 40 15.0 Electrical 41 16.0 Short Parts List 42 17.0 Fault Finding 43 Benchmark Checklist 48 Section Page
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7 © Baxi Heating UK Ltd 2020 Fig. 1 Control Box Case Front Panel Data Badge Information Label 1.0 introduction 1.1 Description 1. The Baxi Platinum+ System is a fully automatic gas fired wall mounted condensing system boiler. It is room sealed and fan assisted. 2. The boiler is set to give a maximum output of :- 32 kW 34.4 kW Pnc (Condensing) 3. It is designed for use on Natural Gas (G20). The boiler is supplied a magnetic filter which must be installed on the primary system return pipework close to the boiler after the last radiator. 4. The boiler incorporates a circulating pump and expansion vessel. It is suitable for use only on fully pumped sealed systems. 5. The boiler data badge gives details of the model, serial number and Gas Council number and is situated on the inner door panel. It is visible when the case front panel is removed (Fig. 1). 6. The boiler model name and serial number are also shown on the information label on the rear of the lower door panel. This is for user reference. 7. The boiler is intended to be installed in residential / domestic environments on a governed meter supply only. 8. The boiler must be installed with one of the purpose designed flues such as the standard horizontal telescopic flue kit, part no. 7205987-01 . 9. all systems must be thoroughly flushed and treated with inhibitor (see section 6.1). iMPORTaNT: If the boiler is installed at a high point in the system it is strongly recommended that Automatic Air Vent Kit 7200047 - 01 is fitted. 1.2 Contents of Pack The pack contains:- • Boiler • Wall Plate (including taps) • Set of Pipe Connections • Template & ‘Quick Fit’ Guide • Literature Pack • Magnetic System Filter & Service Spanner
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8 2.0 General Layout © Baxi Heating UK Ltd 2020 2.1 Layout 1. Expansion Vessel 2. Automatic Air Vent 3. Circulation Pump 4. Drain Off Point 5. Pressure Relief Valve 6. Selector Switch 7. Central Heating System Pressure Gauge 8. PCB 9. Control Box 10. Gas Valve 11. Condensate Trap 12. Flame Sensing Electrode 13. Spark Electrode 14. Primary Heat Exchanger 15. Fan Assembly 16. On/Off/Reset Selector Switch 17. Central Heating Temperature Control 18. Calibration Control 19. Venturi 20. Air/Gas Collector 21. Combustion Box Cover & Burner 22. Igniter 23. Burner On Light 24. Central Heating Mode Light 25. Display 26. Air Pressure Switch 1 16 17 18 7 bar 0 1 2 3 4 21 2 3 4 5 6 7 8 9 10 11 12 13 14 15 19 20 22 23 24 25 26
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9 3.0 appliance Operation © Baxi Heating UK Ltd 2020 3.1 Operating Mode (Fig. 2) 1. With a demand for heating or hot water, the pump circulates water through the primary circuit. If the pressure is at least 0.5 bar and the ignition sequence will start. 2. When the flow temperature exceeds the setting temperature, a 3 minute delay occurs before the burner relights automatically (anti-cycling). The pump continues to run during this period. 3. When the demand is satisfied the burner is extinguished and the pump continues to run for a period of 3 minutes (Pump Overrun). iMPORTaNT: When the selector switch is in the ‘0’ (Off) position the electrical supply to the boiler is isolated. The boiler will not operate. 3.2 Frost Protection Mode 1. The frost protection mode is integral to the appliance and functions when the selector switch (see Section 2.1) is in the ON position ( ). If the system temperature falls below 5° C then the boiler will fire on its minimum setting until a flow temperature of 30° C is reached. Further protection can be incorporated by using a system frost thermostat. 3.3 Pump Protection 1. With the selector switch (see Section 2.1) in the ON position ( ) the pump will automatically operate for 1 minute in every 24 hours to prevent sticking. 1 2 4 5 6 7 8 19 18 9 10 12 11 14 13 15 16 17 3 Key 1 Heat Exchanger 2 Burner 3 Ignition Electrode 4 Flame Sensing Electrode 5 Gas Valve 6 Pump 7 Automatic Air Vent 8 Pressure Relief Valve 9 Boiler Drain Point 10 Gas Inlet 11 Boiler Flow 12 Boiler Return 13 Pressure Gauge 14 Automatic By-Pass 15 Water Pressure Sensor 16 Safety Thermostat 17 Temperature Sensor 18 Expansion Vessel 19 Return Temperature Sensor 20 Fan Boiler Primary Circuit Fig. 2 20
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10 © Baxi Heating UK Ltd 2020 0 200 400 600 800 1000 1200 0.5 1 1.5 2 2.5 3 3.5 4 Metre (wg) Flow Rate (l/h) Pump - Available Head 0 5 5.5 4.5 4.0 Technical Data 4.1 Platinum+ 32 System Flue Terminal Diameter 100mm Dimensions Projection 125mm Outercase Dimensions Casing Height - 780mm Overall Height Inc Flue Elbow - 940mm Casing Width - 450mm Casing Depth - 345mm Central Heating Primary Circuit Pressures bar Safety Discharge 3 Max Operating 2.5 Min Operating 0.5 Recommended Operating Range 1-2 Pump Available Head See graph below Expansion Vessel - (Integral with appliance) bar Min Pre-charge Pressure 0.5 litre Max Capacity of CH System 125 For greater system capacities an additional expansion vessel MUST be fitted. Primary Water Content of Boiler (unpressurised) 2.5 Connections copper tails Gas Supply - 22mm Central Heating Flow - 22mm Central Heating Return - 22mm Pressure Relief Discharge - 15mm Temperatures Flow Temp (adjustable) 25°C to 80°C max (± 5°C) NOx Class 6 Clearances Above Casing 200 mm Min Below Casing 150 mm Min* Front 450 mm Min (For Servicing) Front 5 mm Min (In Operation) L.H. Side 5 mm Min R.H. Side 5 mm Min (In Operation) *This is the MINIMUM recommended dimension. A greater clearance will aid installation and maintenance. Heat Output Pn (Non-Condensing) Max Min kW 32.0 9.4 Electrical Supply 230V~ 50Hz (Appliance must be connected to an earthed supply) Power Consumption 125 W Electrical Protection IPX5D internal Fuse Rating F2L appliance Category CAT I 2H inlet Pressure (Natural Gas - G20) mbar 20 injector (Natural Gas - G20) 12mm appliance Type C13 C33 Heat Output Pnc (Condensing) Max Min kW 34.4 10.2 Max Gas Rate (Natural Gas - G20) (After 10 mins) m3/h 3.48 Condensate Drain To accept 21.5mm (3/4 in) plastic waste pipe Heat input Qn Hs (Gross) Max Min kW 36.4 10.8 External Fuse Rating 3A Weights Packaged Boiler Carton 45.5 kg Installation Lift Weight 38.4 kg NOTE: All data in this section are nominal values and subject to normal production tolerances. SaP 2012 annual Efficiency 88.6% This value is used in the UK Government’s Standard Assessment Procedure (SAP) for energy rating of dwellings. The test data from which it has been calculated has been certified by 0085. Product Characteristics Database (SEDBUK)
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11 4.0 Technical Data © Baxi Heating UK Ltd 2020 4.2 Technical Parameters Technical parameters for boiler space heaters Condensing boiler Low-temperature boiler(1) B1 boiler Cogeneration space heater Combination heater Useful heat output at rated heat output and high temperature regime Useful heat output at 30% of rated heat output and low temperature regime(1) Useful efficiency at rated heat output and high temperature regime(2) Useful efficiency at 30% of rated heat output and low temperature regime(1) Full load Part load Standby mode Standby heat loss Ignition burner power consumption Annual energy consumption Sound power level, indoors Emissions of nitrogen oxides (1) Low temperature means for condensing boilers 30°C, for low temperature boilers 37°C and for other heaters 50°C return temperature (at heater inlet). (2) High temperature regime means 60°C return temperature at heater inlet and 80°C feed temperature at heater outlet. See The back cover for contact details. Baxi Platinum+ 32 System Rated heat output Seasonal space heating energy efficiency Auxiliary electricity consumption Other items Yes No No No No 32 32.0 10.6 92 87.8 96.7 0.043 0.0148 0.003 0.040 - 27778 100 54 24 Prated kW P4 kW P1 kW Šs % Š4 % Š1 % elmax kW elmin kW PSB kW Pstby kW Pign kW QHE kWh GJ LWA dB NOX mg/kWh
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12 5.0 Dimensions and Fixings © Baxi Heating UK Ltd 2020 360° Orientation Flue Ø 100mm D C B a E G F at least 1.5° H Heating Return (22mm) Heating Flow (22mm) Pressure Relief Valve (15mm) Gas Inlet (22mm) 130 mm 130 mm 65 mm Condensate Drain 32.5 mm Tap Rail Dimensions a 780mm B 345mm C 450mm D 116mm Ø Min. E 160mm (207mm for 80/125mm flue systems) F 145mm G 106mm H 180mm NOTE: There must be no part of the air duct (white tube) visible outside the property after installation. The flue seal should fit neatly and effect a good seal. For full detail refer to Section 9.6 “Fitting the Flue”.
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13 6.0 System Details © Baxi Heating UK Ltd 2020 6.1 Central Heating Circuit 1. The appliance is suitable for fully pumped SEALED SYSTEMS ONLY. Treatment of Water Circulating Systems • All recirculatory water systems will be subject to corrosion unless an appropriate 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. • BS7593 gives extensive recommendations on system cleansing and water treatment. • All systems must be thoroughly drained and flushed out using an appropriate proprietary flushing agent. • A suitable inhibitor must then be added to the system. • All system additives (flushing agents, cleansers, inhibitors etc.) must comply with the requirements of BS7593. Full instructions are supplied with the products and for further information contact the additive manufacturer directly or consult their website. 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. 6.2 Bypass 1. The boiler is fitted with an automatic integral bypass. 6.3 System Control 1. For optimum operating conditions, the heating system into which the boiler is installed should include a control system. 2. Such a system will comprise of a timer control and separate room or cylinder thermostats as appropriate. 3. The boiler should be controlled so that it operates on demand only. 4. Operation of the system under control of the boiler thermostat & TRV’s only does not produce the best results. iMPORTaNT: a magnetic system filter is included with the boiler pack. To ensure continued protection of the boiler and system it (or alternative suggested filter - see table) must be fitted on the primary return pipework as close as possible to the boiler after the last radiator in accordance with the instructions supplied with it and BS7593. Failure to install the filter supplied (or alternative suggested filter) correctly will affect the boiler warranty. When the boiler is serviced the filter must be inspected and cleaned in accordance with the manufacturers instructions supplied. it is recommended that the filter lid and drain seals are replaced at each service. Micro2 Pro2 XP Notes: Micro2 is the model of filter supplied. An alternative “Adey” brand filter may be more appropriate on larger systems - see table. The number of radiators is nominal and will also depend upon their size, system volume etc. Always fit our supplied or suggested alternative magnetic filter (as appropriate) in line with our testing & BS7953. Y Y N/A N/A 22mm 28mm Valves Maximum no. of Radiators Y Y up to 15 15-20 20-30 Suggested alternative filters for larger systems
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14 6.0 System Details © Baxi Heating UK Ltd 2020 6.4 System Filling and Pressurising 1. 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. 2. The filling method adopted must be in accordance with all relevant water supply regulations and use approved equipment. 3. Your attention is drawn to: for GB: Guidance G24.2 and recommendation R24.2 of the Water Regulations Guide. for IE: the current edition of I.S. 813 “Domestic Gas Installations”. 4. 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 prevention device is permanently connected at the inlet to the circuit and the temporary connection is removed after use. 6.5 Expansion Vessel 1. The appliance expansion vessel is pre-charged to 0.5 bar. Therefore, the minimum cold fill pressure is 0.5 bar. The vessel is suitable for correct operation for system capacities up to 125 litres. For greater system capacities an additional expansion vessel must be fitted. For GB refer to BS 7074 Pt 1. For IE, the current edition of I.S. 813 “Domestic Gas Installations”. 6.6 Safety Pressure Relief Valve (Fig. 4) 1. 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. 2. The pressure relief discharge pipe should be not less than 15mm dia, run continuously downward, and discharge outside the building, preferably 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 (Fig. 4a).. 3. The discharge must not be above a window, entrance or other public access. Consideration must be given to the possibility that boiling water/steam could discharge from the pipe. 4. A remote relief valve kit is available to enable the boiler to be installed in cellars or similar locations below outside ground level (kit no. 5121379). 5. A boiler discharge pump is available, part no. 720648301. This pump will dispose of both condensate and high temperature water from the relief valve. It has a maximum head of 5 metres. Fig. 3 Fig. 4 Stop Valve Double Check Valve Mains Cold Inlet CH Return Temporary Hose Pressure Relief Valve Discharge Pipe Stop Valve Fig. 4a The end of the pipe should terminate facing down and towards the wall
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15 7.0 Site Requirements © Baxi Heating UK Ltd 2020 7.1 Location 1. 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 permitting satisfactory removal of combustion products and providing an adequate air supply. The boiler should be fitted within the building unless otherwise protected by a suitable enclosure i.e. garage or outhouse. (The boiler may be fitted inside a cupboard-see Section 7.3). 2. If the boiler is sited in an unheated enclosure then it is recommended to leave the ON/OFF Selector Switch in the On position. 3. 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 I.E.E. Wiring Regulations and Building Regulations. In IE reference should be made to the current edition of I.S. 813 “Domestic Gas Installations” and the current ETCI rules. 4. 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 Engineers Publication IGE/UP/7 (Gas Installations in Timber Framed Housing). *This is the MINIMUM recommended dimension. Greater clearance will aid installation and maintenance. 7.2 Clearances (Figs. 5 & 6) 1. A flat vertical area is required for the installation of the boiler. 2. 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. 150mm Min* 780mm 450mm 175mm Min (300mm Min if using 80/125mm flueing system) 5mm Min 5mm Min 450mm Min For Servicing Purposes Fig. 5 Fig. 6 In Operation 5mm Min At least 1.5°
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16 7.0 Site Requirements © Baxi Heating UK Ltd 2020 7.3 Ventilation of Compartments 1. Where the appliance is installed in a cupboard or compartment, no air vents are required. 2. BS 5440: Part 2 refers to room sealed appliances installed in compartments. The appliance will run sufficiently cool without ventilation. 7.4 Gas Supply 1. The gas installation should be in accordance with the relevant standards. In GB this is BS 6891. In IE this is the current edition of I.S. 813 “Domestic Gas Installations”. 2. The connection to the appliance is a 22mm copper tail located at the rear of the gas service cock (Fig. 7). 3. 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 (22mm) UNLESS the stated gas rate can be achieved with pipe of lesser diameter and with all other gas appliances operating at maximum rate. 7.5 Electrical Supply 1. External wiring must be correctly earthed, polarised and in accordance with relevant regulations/rules. In GB this is the current I.E.E. Wiring Regulations. In IE reference should be made to the current edition of ETCI rules. 2. The mains supply is 230V ~ 50Hz fused at 3A. NOTE: The method of connection to the electricity supply must facilitate complete electrical isolation of the appliance. Connection may be via a fused double-pole isolator with a contact separation of at least 3mm in all poles and servicing the boiler and system controls only. 3. When the system includes an indirect domestic hot water cylinder it is recommended that a cylinder thermostat is used in conjunction with a 3 port 2 position valve or 2 port zone valve. 7.6 Bath & Shower Rooms 1. If the boiler is fitted in a room containing a bath or shower and NOT FiTTED with any integral receiver, it can be fitted in zone 2, (Figs. A & B shows zone dimensions for a bathtub. For other examples refer to the Current I.E.E. Wiring Regulations) reference must be made to the relevant requirements. In GB this is the current I.E.E. Wiring Regulations and Building Regulations. In IE reference should be made to the current edition of I.S. 813 “Domestic Gas Installations” and the current ETCI rules. Fig. 7 Gas Service Cock Zone 2 Zone 1 Zone 0 Zone 2 Zone 2 Window Recess Window Recess 0.6 m Ceiling Outside Zones Zone 2 Zone 1 Zone 0 2.25 m Window Recess Zone 2 0.6 m Fig. a Fig. B In GB Only In GB Only
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17 7.0 Site Requirements © Baxi Heating UK Ltd 2020 7.7 Condensate Drain 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 PiPEWORK BEiNG SUBJECT TO FREEZiNG CONDiTiONS aND aPPROPRiaTE MEaSURES TaKEN TO PREVENT BLOCKaGE. CORRECT iNSTaLLaTiON iN aCCORDaNCE WiTH THiS SECTiON WiLL CONSiDERaBLY MiNiMiSE THE LiKELiHOOD OF BLOCKaGE aND SUBSEQUENT BOiLER LOCK-OUT. a CONDENSaTE DiSCHaRGE PUMP aND PiPE ‘TRaCE HEaTiNG’ aRE aVaiLaBLE aS aCCESSORiES - see paragraphs 7.7.12 to 7.7.15 for further details. The condensate discharge pipe MUST NOT RiSE at any point along its length. There MUST be a fall of aT LEaST 2.5° (50mm per metre) along the entire run EXCEPT when employing a suitable condensate pump in basement and cellar or similar applications. The boiler condensate trap incorporates a seal of 75mm, therefore it is unnecessary to install an air break and trap in the discharge pipework. 1. The condensate outlet will accept 21.5mm (3/4in) 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. 2. 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. 3. The discharge pipe should be run in a proprietary drain pipe material e.g. PVC, PVC-U, ABS, PVC-C or PP. 4. Metal pipework is NOT suitable for use in condensate discharge systems. 5. The pipe should be a minimum of 21.5mm diameter and must be supported using suitably spaced clips of the correct design to prevent sagging. 6. it is advisable that the full length of condensate pipe is run internally and preferably be less than 3 metres. 7. internal runs greater than 3 metres or runs in cold areas should use 32mm waste pipe. 8. External runs MUST be a MiNiMUM of 32mm and fully insulated with material suitable for external use. 9. If the boiler is fitted in an unheated location the entire condensate discharge pipe should be treated as an external run and sized and insulated accordingly. 10. In all cases discharge pipe must be installed to aid disposal of the condensate. 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. 11. 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 subjected to internal pressure fluctuations when WC's are flushed or sinks emptied then back-pressure may force water out of the boiler trap and cause appliance lockout. 21.5mm 2.5° Minimum fall i) Termination to an internal soil and vent pipe 450mm min* Boiler 2.5° Minimum fall ii) External termination via internal discharge branch e.g sink waste - downstream* Sink Pipe must terminate above water level but below surrounding surface. Cut end at 45° 50mm per metre of pipe run 50mm per metre of pipe run *450mm is applicable to properties up to 3 storeys. For multi-storey building installations consult BS 6798. Examples are shown of the following methods of termination:- i) to an internal soil & vent pipe ii) via an internal discharge branch (e.g. sink waste) downstream of the trap iii) to a drain or gully iv) to a purpose made soakaway v) pumped into an internal discharge branch (e.g. sink waste) downstream of the trap vi) pumped into an external soil & vent pipe vii) to a drain or gully with extended external run & trace heating it is strongly recommended to discharge internally into the household drainage system. if connecting to a rain water drain, that drain MUST discharge into a foul drain. *It is NOT RECOMMENDED to connect upstream of the sink or other waste water receptacle ! 32mm Insulation Boiler 2.5° Minimum fall iii) Termination to a drain or gully 50mm per metre of pipe run Pipe must terminate above water level but below surrounding surface. Cut end at 45° Boiler 500mm min 2.5° Minimum fall iv) Termination to a purpose made soakaway Holes in the soak-away must face away from the building 50mm per metre of pipe run Further specific requirements for soakaway design are referred to in BS 6798.
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18 7.0 Site Requirements © Baxi Heating UK Ltd 2020 7.7 Condensate Drain (cont.) 12. A boiler discharge pump is available, ‘MULTIFIT’ part no. 720648301. This pump 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. 13. Condensate Drain Pipe ‘Trace Heating’ Elements are available in various lengths. ‘MULTIFIT’ part nos.:- 1 metre 720644401 2 metre 720664101 3 metre 720664201 5 metre 720664401* *Where the drain is between 3 & 5 metres a 5 metre kit can be used and “doubled back” upon itself. 14. It is possible to fit the element externally on the condensate drain or internally as detailed in the instructions provided. 15. The fitting of a ‘Trace Heating’ Element is NOT a substitute for correct installation of the condensate drain. ALL requirements in this section must still be adhered to. Boiler vi) pumped into an external soil & vent pipe 2.5° Minimum fall 50mm per metre of pipe run Condensate Pump Unheated Location (e.g. Garage) Basement or similar (heated) Boiler 2.5° Minimum fall 50mm per metre of pipe run Pipe must terminate above water level but below surrounding surface. Cut end at 45° The ‘Trace Heating’ element must be installed in accordance with the instructions supplied. External runs & those in unheated locations still require insulation. vii) to a drain or gully with extended external run & trace heating Boiler v) pumped into an internal discharge branch (e.g. sink waste) downstream of the trap Pipe must terminate above water level but below surrounding surface. Cut end at 45° 2.5° Minimum fall 50mm per metre of pipe run Condensate Pump Sink Basement or similar (heated)
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19 7.0 Site Requirements © Baxi Heating UK Ltd 2020 7.8 Flue NOTE: Due to the nature of the boiler a plume of water vapour will be discharged from the flue. This should be taken into account when siting the flue terminal. 1. The following guidelines indicate the general requirements for siting balanced 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 “Domestic Gas Installations”. 2. If the terminal discharges onto a pathway or passageway, check that combustion products will not cause a nuisance and that the terminal will not obstruct the passageway. 3. 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. iMPORTaNT: • Under car ports we recommend the use of the plume displacement kit. • The terminal position must ensure the safe and nuisance - free dispersal of combustion products. *4. Reduction to the boundary is possible down to 25mm but flue deflector part no. 5111068 must be used. N I I G F M I A A F H J,K D E H Likely flue positions requiring a flue terminal guard C R A I J,K I L S B T U Fig. 9 Fig. 8 300 min Terminal Assembly Top View Rear Flue Property Boundary Line NOTE: The distance from a fanned draught appliance terminal installed parallel to a boundary may not be less than 300mm in accordance with the diagram below Opening Window or Door 150mm MIN. iMPORTaNT: If fitting a Plume Displacement Flue Kit, the air inlet must be a minimum of 150mm from any opening windows or doors. Plume Displacement Kit Air Inlet Fig. 10 Terminal Position with Minimum Distance (Fig. 9) (mm) A1 Directly below an opening, air brick, opening windows, etc. 300 B1 Above an opening, air brick, opening window etc. 300 C1 Horizontally to an opening, air brick, opening window etc. 300 D2 Below gutters, soil pipes or drain pipes. 25 (75) E2 Below eaves. 25 (200) F2 Below balconies or car port roof. 25 (200) G2 From a vertical drain pipe or soil pipe. 25 (150) H2 From an internal or external corner. 25 (300) I Above ground, roof or balcony level. 300 J From a surface or boundary line facing a terminal. 600 K From a terminal facing a terminal (Horizontal flue). 1200 From a terminal facing a terminal (Vertical flue). 600 L From an opening in carport (e.g. door, window) into the dwelling. 1200 M Vertically from a terminal on the same wall. 1500 N Horizontally from a terminal on the same wall. 300 R From adjacent wall to flue (vertical only). 300 S From an adjacent opening window (vertical only). 1000 T Adjacent to windows or openings on pitched and flat roofs 600 U Below windows or openings on pitched 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 25mm clearance is allowed per installation. If one of the dimensions D, E, F, G or H is 25mm then the remainder MUST be as B.S.5440-1. *
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20 © Baxi Heating UK Ltd 2020 8.0 Flue Options 8.1 Horizontal Flue Systems 1. The standard flue is suitable only for horizontal termination applications. 2. All fittings should be fully engaged. The approximate engagement is 40mm. Apply the lubricant supplied to the seal on each fitting to aid assembly. 3. Maximum permissible equivalent flue lengths are:- (60/100) (80/125) Horizontal Concentric 10 metres 20 metres 4. Any additional “in line” bends in the flue system must be taken into consideration. Their equivalent lengths are:- Concentric Pipes: 135° bend 0.5 metres 93° bend 1.0 metres 5. The elbow supplied with the standard horizontal telescopic flue kit is not included in any equivalent length calculations. NOTE: Flue length is measured from point X to Y as shown. iMPORTaNT SUPPORT - all flue systems MUST be securely supported a MiNiMUM of once every metre. 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. 6. Read this section in conjunction with the Flue Installation Guide supplied with the boiler. Horizontal Flues Y X Plume Displacement Kit 60 /100 dia 1M Extensions 45° & 93° elbows are also available. NOTE: Horizontal flue pipes should always be installed with a fall of at least 1.5° from the terminal to allow condensate to run back to the boiler. Y X This bend is equivalent to 1 metre Total equivalent length = a+B+C+2 x 90°Bends B A C This bend is equivalent to 1 metre
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21 © Baxi Heating UK Ltd 2020 8.0 Flue Options Fig. 11 Fig. 12 315mm 500mm Flue Deflector 8.2 Flue Lengths The standard horizontal telescopic flue kit allows for lengths between 315mm and 500mm from elbow to terminal without the need for cutting (Fig. 11). Extensions of 250mm, 500mm & 1m are available. The maximum permissible equivalent flue length is: 10 metres (60/100 system - vertical & horizontal) 20 metres (80/125 system - vertical & horizontal) 15 metres (80/80 twin pipe) 8.3 Flue Trim 1. The flexible flue trims supplied can be fitted on the outer and inner faces of the wall of installation. 8.4 Terminal Guard (Fig. 12) 1. When codes of practice dictate the use of terminal guards ‘Multifit’ accessory part no. 720627901 can be used (Note: This is not compatible with Flue Deflector referred to below). 2. There must be a clearance of at least 50mm between any part of the terminal and the guard. 3. When ordering a terminal guard, quote the appliance name and model number. 4. The flue terminal guard should be positioned centrally over the terminal and fixed as illustrated. 8.5 Flue Deflector 1. 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. 8.6 Flue accessories (Fig. 12a) 1. For full details of Flue Accessories (elbows, extensions, clamps etc.) refer to the Flue Installation Guide supplied in the literature pack. Guidance Notes Flue Accessories Fitting Guide en United Kingdom Please leave these instructions with the Installation and Service Manual Ø 60/100 Flue Systems Ø 80/125 Flue Systems Ø 80/80 Twin Pipe Systems Plume Displacement Kit (Ø 60/100 Flue Systems) READ THESE INSTRUCTIONS IN CONJUNCTION WITH THE BOILER INSTALLATION MANUAL BEFORE FITTING THE FLUE IMPORTANT NOTE: This document will assist in the correct installation of the various flue & chimney systems described within. However, it is the responsibility of the installer/Gas Safe registered commissioning engineer to ensure that the flue & chimney system is fitted safely and in compliance with the relevant standards and practices in force in the country of installation. These Guidance Notes cover the following boiler models: Baxi EcoBlue Combi & System ErP Duo-tec Combi ErP Platinum Combi ErP Megaflo System ErP Potterton Promax Combi & System ErP Gold Combi & System ErP Titanium Combi ErP Promax Ultra Combi ErP Main Eco Elite Combi & System ErP Multifit Fig. 12a Ensure that no part of the white outer chimney duct is visible
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22 © Baxi Heating UK Ltd 2020 1.0 introduction 9.0 installation 9.1 Unpacking & initial Preparation The gas supply, gas type and pressure must be checked for suitability before connection (see Section 7.4). NOTE: a small amount of water may drain from the boiler in the upright position. 1. See section ‘Safe Manual Handling’ before unpacking or lifting the boiler. RiSK aSSESSMENT Before commencing the installation it is recommended that the ‘Five Steps to Risk Assessment’ document published by the HSE is consulted, and an assessment performed as described. 2. Follow the procedure on the carton to unpack the boiler or see Fig. 13. 3. If pre-plumbing (Fig. 14) - the wall jig and fitting kit can be removed without removing the carton sleeve. Simply slide banding to the edge and open the perforated flap, lift out the jig, fitting kit and instructions. If the boiler is to be installed at a later date, close the flap and reposition the banding straps, the boiler can now be stored safely away. 4. After considering the site requirements (see Section 7.0) position the fixing template on the wall ensuring it is level both horizontally and vertically. 5. Mark the position of the two most suitable fixing slots for the wall plate and boiler lower fixing holes. It is preferable to use the vertical fixing slots. 6. Mark the position of the centre of the flue hole (rear exit). For side flue exit, mark as shown (Fig. 15). 7. If required, mark the position of the gas and water pipes. Remove the template. 8. Cut the hole for the flue (minimum diameter 116mm). 9. Drill the wall as previously marked to accept the wall plugs supplied. Secure the wall plate using the fixing screws. 10. Using a spirit level ensure that the plate is level before finally tightening the screws. 11. Connect the gas and water pipes to the valves on the wall plate using the copper tails supplied. Ensure that the sealing washers are fitted between the connections. 9.2 Flushing 1. Flush thoroughly and treat the system in accordance with BS 7593 (see System Details, Section 6.1). 9.3 Location of Magnetic Filter 1. For maximum effectiveness the magnetic filter supplied in the boiler pack (or alternative suggested filter - see table on p.13) must be fitted on the return pipework as close to the appliance as possible after the last radiator. 2. Consideration should be given to access for servicing the filter as it must be cleaned annually. Fig. 16 145mm For Side Flue Exit Wall Plate Fig. 15 Fig. 13 Fig. 14 SNAP OFF LIFT HERE BOTH SIDES To remove only the wall jig slide banding to the edge and open flaps. Slide the wall jig out of carton then close the flaps. Slide banding back on. Pre-plumbing
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23 © Baxi Heating UK Ltd 2020 9.0 installation 9.4 Fitting The Boiler (Fig. 17) 1. Lift the boiler using the Lifting Points as shown by the shaded areas (Fig. 17). The boiler should be lifted by TWO PEOPLE. Engage the slots at the top rear of the boiler on the wall plate (Fig. 17) (see Safe Manual Handling page 5). 2. Ease the boiler forwards and remove the sealing caps from the boiler connections. NOTE: A small amount of water may drain from the boiler once the caps are removed. 3. insert the sealing washers between the valves and pipes on the wall plate and the boiler connections. 4. Tighten all the connections. 9.5 Fitting the Safety Pressure Relief Discharge Pipe (Fig. 18) 1. Remove the discharge pipe from the kit. 2. 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 supplied. 3. The pipework must be at least 15mm diameter and run continuously downwards to a discharge point outside the building. See section 6.7 for further details. 4. Utilising one of the sealing washers, connect the discharge pipe to the adaptor and tighten the nut. 5. Complete the discharge pipework and route it to the outside discharge point. iMPORTaNT: Make all soldered joints before connecting to the pressure relief valve. 9.6 Condensate Drain (see section 7.7) 1. Connect the condensate drain to the trap outlet pipe. Ensure the discharge of condensate complies with any national or local regulations in force (see British Gas “Guidance Notes for the Installation of Domestic Gas Condensing Boilers”. 2. The connection will accept 21.5mm (3/4in) plastic overflow pipe which should generally discharge internally into the household drainage system. If this is not possible, discharge into an outside drain is acceptable. 3. The boiler condensate trap should be primed by pouring approximately 300ml of water into the flue spigot. Do not allow any water to fall into the air inlet. Fig. 18 Pressure Relief Valve Discharge Pipe Fig. 17 Sealing Washers Remove Sealing Caps from under the Boiler after lifting into position Lift Here Both Sides Bottom Polystyrene When the Boiler Mounting Bracket on the Boiler is in position on the Retaining Lugs, the bottom polystyrene may be discarded allowing the boiler to swing into position Prime Trap by pouring 300ml of water into flue spigot
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24 © Baxi Heating UK Ltd 2020 9.0 installation Fig. 19 Fig. 21 315mm 500mm Terminal Assembly Connection Assembly 9.7 Fitting The Flue HORIZONTAL TELESCOPIC FLUE 1. There are two telescopic sections, the Terminal Assembly and the Connection Assembly, a roll of sealing tape and two self tapping screws. A 93° elbow is also supplied. 2. The two sections can be adjusted to provide a length between 315mm and 500mm (Fig. 19) when measured from the flue elbow (there is 50mm engagement into the elbow). 3. Locate the flue elbow on the adaptor at the top of the boiler. Set the elbow to the required orientation (Fig. 20). NOTE: The flue elbow is angled at 93 degrees to ensure a fall back to the boiler. 4. Measure the distance from the outside wall face to the elbow. This dimension will be known as ‘X’ (Fig. 20). 5. If the distance from the flue elbow to the outside face of the wall (‘X’ in Fig. 20) is less than 250mm the Connection Assembly can be discarded and the Terminal Assembly fitted directly into the elbow. 6. In instances where the dimension ‘X’ (Fig. 20) is between 250mm and 315mm it will be necessary to shorten the Terminal Assembly by careful cutting to accommodate walls of these thicknesses. 7. To dimension ‘X’ add 40mm. This dimension to be known as ‘Y’. 8. Adjust the two telescopic sections to dimension ‘Y’ and seal the joint with the tape provided (Fig. 22). Ensure that the labels marked ‘TOP’ on the Terminal and Connection Assemblies are uppermost. 9. Using the clearance holes in the Connection Assembly secure it to the Terminal Assembly using the screws supplied (Fig. 23). Wall Thickness (X) Wall Thickness (X) Fig. 23 ‘Peak’ to be uppermost Dimension ‘Y’ Securing Screw Sealing Tape ‘TOP’ Label ‘TOP’ Label Fig. 20 Fig. 22
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25 © Baxi Heating UK Ltd 2020 9.0 installation Slots at bottom Fig. 26 Flue Elbow Adaptor Apply Lubricant for ease of assembly. Ensure Elbow is fully engaged into Boiler Adaptor Apply the lubricant supplied for ease of assembly (do not use any other type). Ensure Flue is fully engaged into Elbow Elbow to adaptor securing screws Flue to elbow securing screws Trims 9.7 Fitting the Flue (Cont) 10. Remove the flue elbow and insert the flue through the hole in the wall. 11. Refit the elbow to the boiler adaptor, ensuring that it is pushed fully in (Fig. 24). 12. Two flue trims are supplied, one for internal use, the other for outside. The internal trim is packaged and identified as such - it should not be used externally. 13. It is recommended that if the internal trim is being used it is first fitted over the elbow to allow access to the securing screws and then manoeuvred into place against the wall. 14. 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 (Fig. 25). 15. Ensure that the terminal is positioned with the slots to the bottom (Fig. 26). Secure the flue to the elbow with the screws supplied (Fig. 25). 16. Secure the elbow flue to the boiler adaptor with the screws supplied in the boiler fittings pack (Fig. 25). iMPORTaNT: It is essential that the flue terminal is fitted as shown to ensure correct boiler operation and prevent water entering the flue. 17. Make good between the wall and air duct outside the building, appropriate to the wall construction and fire rating. 18. If necessary fit a terminal guard (see Section 8.4). Fig. 24 Fig. 25
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26 © Baxi Heating UK Ltd 2020 9.0 installation 9.8 Making The Electrical Connections The boiler must be connected to the mains fused 3A 230V 50HZ supply & control system using cable of 3 core 0.75mm 3183Y multi strand flexible type (see IMPORTANT note opposite). NOTE: Both the Live and Neutral connections are fused. To connect an external control proceed as follows:- 1. Slacken the facia panel securing screws and lift the outercase panel so that its securing tabs are clear of the facia. Remove the panel. 2. Completely undo the screws securing the facia panel and hinge it down (Fig. 27). 3. Undo the terminal block cover securing screw and remove the cover (Fig. 27). 4. Slacken the unused cable clamp on the LH side of the boiler chassis (Fig. 28). Insert the external control wiring through the clamp and route it to the terminal block. 5. Refer to the instructions supplied with the control. iMPORTaNT: The external control MUST be suitable for 230V switching and fused 3A maximum. 6. Remove the link between terminals 1 & 2. The switched output from the external control must be connected to terminal 2 (Fig. 29). 7. Ensure that the external control input cable(s) have sufficient slack to allow the control box to drop down. Tighten the cable clamp on the boiler chassis. 8. Replace the terminal block cover, routing the external control input cable(s) through the second cut-out. 9.9 Preliminary Electrical Checks 1. Prior to commissioning the boiler preliminary electrical system checks should be carried out. 2. These should be performed using a suitable meter, and include checks for Earth Continuity, Resistance to Earth, Short Circuit and Polarity. Always fit fast blow 2A fuse Fused supply 3A 230V ~ 50Hz Neutral (blue) Earth (green/yellow) Live (brown) 1 2 230V br b g/y bk bk Fig. 28 Fig. 29 Fig. 27 Terminal Block Fuses Cable Clamp Terminal Block Cover Facia Panel iMPORTaNT • Any wiring to the boiler, from either the mains or an external control, MUST be cable of the following specification:- 0.75mm 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 withstand 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 hazardous 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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27 © Baxi Heating UK Ltd 2020 10.0 Commissioning Pump Automatic Air Vent Pressure Gauge Screw bar 0 1 2 3 4 Fig. 30 Selector Switch Central Heating Temperature Control Calibration Control bar 0 1 2 3 4 Pump Fig. 32 Fig. 31 Display 10.1 Commissioning the Boiler 1. Reference should be made to BS:EN 12828 & 14336 when commissioning the boiler. 2. At the time of commissioning, complete all relevant sections of the Benchmark Checklist at the rear of this publications. 3. Ensure that the filling loop is connected and open, then open the heating flow and return valves on the boiler. 4. Open the screw on the automatic air vent on the pump body (Fig. 30). iMPORTaNT: If the boiler is installed at a high point in the system it is strongly recommended that Automatic Air Vent Kit 720004701 is fitted. Ensure that this vent is open. 5. The system must be flushed in accordance with BS 7593 (see Section 6.2) and the flushing agent manufacturers instructions. 6. Pressurise the system to 1.5 bar (Fig. 31) then close and disconnect the filling loop. 7. Turn the gas supply on and purge the system according to in GB BS 6891 and in IE I.S. 813 “Domestic Gas Installations”. 8. Test for gas tightness. 9. Hinge the facia panel upwards and refit the case front panel. Tighten the securing screws. 10. Having checked: • That the boiler has been installed in accordance with these instructions. • The integrity of the flue system and the flue seals. • The integrity of the boiler combustion circuit and the relevant seals. Proceed to put the boiler into operation as follows: 11. The Combustion Check procedure as shown by the chart in 10.2 is mandatory. The method of setting the boiler to operate at maximum and minimum rates to comply with the procedure is described below. 12. Ensure that all external controls are calling for heat. The actual current boiler temperature is shown on the display. 13. Turn both control knobs fully anticlockwise, then quickly turn the right hand knob 1/4 clockwise twice and back fully anticlockwise (Fig. 32). 14. The display will now alternate between ‘SF’ and the current boiler temperature and both green LEDs will flash. 15. To set to maximum rate. Turn the left hand knob fully clockwise. As the knob is turned the display will change, indicating the fan speed. 16. The display will show ‘00’, indicating maximum rate, then revert to ‘P ‘ alternating with the current boiler temperature. 17. To set to minimum rate. Turn the left hand knob fully anti-clockwise. As the knob is turned the display will change, indicating the fan speed. When the display reads ‘ 0’ the boiler runs at minimum rate. 18. This function is maintained for 20 minutes unless the maximum CH temperature is exceeded. The function can be disabled at any time by turning the right hand knob.
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28 © Baxi Heating UK Ltd 2020 10.0 Commissioning Set Boiler to Maximum Rate (see 11.1.11) 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% ? 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. Set Boiler to Minimum Rate (see 11.1.17) Allow the combustion to stabilise. Do not insert probe to avoid ‘flooding’ the analyser. Yes No No Yes No Yes 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. 10.2 Checking Combustion 1. Follow the flow chart opposite.
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29 © Baxi Heating UK Ltd 2020 10.0 Commissioning Selector Switch Display bar 0 1 2 3 4 Central Heating Temperature Control Calibration Control Fig. 35 Fig. 36 Fig. 37 Fig. 38 Fig. 39 Central Heating Temperature Control Calibration Control Fig. 33 x 2 10.3 Check the Operational (Working) Gas inlet Pressure 1. Ensure that all controls are calling for heat, and the selector switch is in the central heating and hot water position ( ). The current boiler temperature is shown on the display. 2. To check the gas rate it is necessary to set the boiler to ‘Calibration Mode’. 3. Turn both temperature control knobs fully anticlockwise, then quickly turn the Calibration Control knob 1/4 clockwise twice and back fully anticlockwise (Fig. 33). 4. The display will now alternate between ‘SF’ and the current boiler temperature and both green LEDs will flash (Figs. 35 & 36). 5. Turn CH temperature control knob fully clockwise. As the knob is turned the display will change from ‘0’ to ‘00’ (Fig. 39) indicating maximum rate, then revert to ‘P’ alternating with the current boiler temperature (Figs 38 & 39). 6. With the boiler operating in the maximum rate condition check that the operational (working) gas pressure at the inlet gas pressure test point (Fig. 34) is in accordance with B.S. 6798 & B.S. 6891. 7. Ensure that this inlet pressure can be obtained with all other gas appliances in the property working. Measure the Gas Rate 8. With any other appliances & pilot lights turned OFF the gas rate can be measured. It should be:- 3.48 m3/h 9. The ‘Calibration Function’ is active for 20 minutes unless the maximum CH temperature is exceeded. 10. The function can be disabled at any time by turning the Calibration Control knob. 11. Carefully read and complete all sections of the Benchmark Commissioning Checklist at the rear of this publication that are relevant to the appliance and installation. These details will be required in the event of any warranty work. The publication must be handed to the user for safe keeping and each subsequent regular service visit recorded. 12. 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 Benchmark Commissioning Checklist. Gas Valve Gas Pressure Test Point Fig. 34
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30 © Baxi Heating UK Ltd 2020 11.0 Completion 11.1 Completion 1. Instruct the user in the operation of the boiler and system including external controls, explaining the operational sequence. 2. Set the central heating and hot water temperature control knobs to the requirements of the user. 3. Carefully read and complete all sections of the Benchmark Commissioning Checklist at the rear of this publication that are relevant to the appliance and installation. These details will be required in the event of any warranty work. The publication must be handed to the user for safe keeping and each subsequent regular service visit recorded. 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 Benchmark Commissioning Checklist. 5. Hand over the Users Operating, Installation and Servicing Instructions giving advice on the necessity of regular servicing which must include the filter. Fig. 40 Facia Panel Case Front Panel 10.0 Commissioning 10.3 Check the Operational (Working) Gas inlet Pressure (cont.) 13. Working Gas Pressures If the pressure drops are greater than shown in Fig. 39a a problem with the pipework or connections is indicated. Permissible pressure drop across system pipework ≤1 mbar. EV1 EV2 P. OUT 1 2 3 4 VENT RQ ADJ. Gas Cock Gas Valve Gas Meter 19-23 mbar 17-21 mbar Fig. 39a
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31 © Baxi Heating UK Ltd 2020 Case Front Panel Fig. 41 Facia Panel Securing Screws Fig. 42 Inner Door Panel Condensate Trap Sump 12.0 Servicing 12 .1 annual Servicing 1. For reasons of safety and economy, it is recommended that the boiler and filter are serviced annually. Servicing must be performed by a competent person in accordance with B.S. 7967-4. 2. 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. • The integrity of the boiler combustion circuit and relevant seals as described in Section 12.2. • The operational gas inlet pressure as described in Section 10.3.1 to 10.3.7 and the gas rate as described in 10.3.8. • The combustion performance as described in ‘Check the Combustion Performance’ (12.1.4 to 12.1.6 below). 3. Competence to carry out Checking Combustion Performance B.S. 6798 ‘Specification for Installation & Maintenance of Gas Fired Boilers not exceeding 70kW’ 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 interpretation of the results. • The flue gas analyser used should be one meeting the requirements of BS7927 or BS-EN50379-3 and be calibrated in accordance with the analyser 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) 4. Set the boiler to operate at maximum rate as described in Section 15.1.1 to 15.1.6. 5. Remove the plug from the flue sampling point, insert the analyser probe and obtain the CO/CO2 ratio. This must be less than 0.004. 6. If the combustion 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 ‘Annual Servicing - Inspection’ (Section 12.2) & re-check • Adjust the gas valve (Section 14.0) & re-check • Replace the gas valve (Section 13.24) & re-check 12.2 annual Servicing - inspection 1. Ensure that the boiler is cool. 2. Ensure that both the gas and electrical supplies to the boiler are isolated. 3. Slacken the screws securing the facia panel. Lift the outercase panel so that its securing tabs are clear of the facia. Remove the panel, allowing the facia to hinge down (Fig. 41). 4. Remove the screws securing the inner door panel. Lift the panel slightly to disengage it from the studs on top of the case (Fig. 42). 5. Unscrew the sump from the bottom of the condensate trap assembly (Fig. 43) and remove any deposits from the sump and trap. Clean as necessary and replace the sump Fig. 43 iMPORTaNT: The magnetic filter fitted on the primary pipework must be serviced annually in accordance with the instructions supplied with it. Only dismantle the filter when the system is cool and the pressure has been relieved. Care should be taken as there will be some loss of system water when performing the filter service.
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32 © Baxi Heating UK Ltd 2020 12.0 Servicing Fig. 44 Fig. 45 Gas Inlet Pipe Venturi Injector Fan, Collector and Cover Assembly Electrode Leads 12.2 annual Servicing - inspection (Cont) 6. Undo the nut on the gas inlet pipe to the venturi (Fig. 45) and pull the sensing pipe off the fan. 7. Disconnect the electrode leads, noting their position, and the fan electrical plugs (Fig. 44). 8. Undo the four nuts retaining the combustion box cover to the heat exchanger. Disconnect the sensing pipe and wires from the air pressure switch. 9. Carefully draw the fan, collector, air pressure switch and cover assembly forward, being careful to retain the injector in the venturi (Figs. 44 & 45). 10. Clean any debris from the heat exchanger and check that the gaps between the tubes are clear. 11. Inspect the burner, electrodes position and insulation, cleaning or replacing if necessary. Clean any dirt or dust from the air box. 12. Reassemble in reverse order. NOTE: The sensing pipe must be reconnected to the fan, not the venturi. 13. Complete the relevant Service Interval Record section of the Benchmark Commissioning Checklist at the rear of this publication and then hand it back to the user. 7.5 ±1 4 ±0.5 10 ±1 Spark Ignition Electrode Sensing Electrode Electrode Position Viewing Window Burner
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33 © Baxi Heating UK Ltd 2020 13.0 Changing Components iMPORTaNT: When changing components ensure that both the gas and electrical supplies to the boiler are isolated before any work is started. When the component has been changed turn the selector switch fully anticlockwise against the spring pressure to the reset position and hold for 5 seconds to reset the boiler before recommissioning. See Section 12.2 “Annual Servicing” for removal of case panel, door etc. 13.1 igniter (Fig. 46) 1. Disconnect the igniter feed plug and the electrode leads, noting their positions. 2. Undo the screw securing the bracket to the boiler. 3. Remove the igniter and transfer the bracket to the new component. 4. Reassemble in reverse order. 13.2 Spark and Sensing Electrodes (Fig. 47) 1. Disconnect the electrode leads, noting their positions. 2. Remove the retaining screws securing each of the electrodes to the combustion box cover and remove the electrodes. 3. Check the condition of the sealing gaskets and replace if necessary. Reassemble in reverse order. 13.3 air Pressure Switch (Fig. 47a) 1. Undo the screw securing bracket to the side panel. Remove the screws holding the Air Pressure Switch to the bracket. 2. Ease the sensing pipe off the P1 spigot on the switch and disconnect the two wires. 3. Reassemble in reverse order. Igniter Igniter Feed Plug Electrode Leads Bracket Fig. 47 Spark Electrode Sensing Electrode Electrode Leads Fig. 47a Fig. 46 Bracket Air Pressure Switch Sensing Pipe 3 1 2 Connect to terminals 1 & 2 (3 not used)
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34 © Baxi Heating UK Ltd 2020 13.0 Changing Components 13.4 Fan (Fig. 48) 1. Undo the nut on the gas inlet pipe to the venturi (Fig. 48) and pull the sensing pipe off the fan. 2. Disconnect the electrode leads, noting their position and disconnect the fan electrical plugs. Disconnect the sensing pipe and wires from the air pressure switch (not 32 models). 3. Undo the screws securing the collector to the extension piece. 4. Remove the collector and fan assembly, being careful to retain the injector in the venturi. 5. Undo the screws securing the fan to the venturi and fit the new fan, replacing the seal if necessary. 6. Examine the burner gasket and replace if necessary. 7. Reassemble in reverse order, ensuring that the injector is in place and the sensing pipe is connected to the fan. 13.5 Venturi (Fig. 49) 1. Remove the collector and fan assembly as described in section 13.4. 2. Extract the injector from the venturi. 3. Undo the screws securing the fan to the venturi and the venturi to the collector. iMPORTaNT: When fitting the new venturi, ensure the arrows on it’s base point into the collector (Fig. 50). 4. Examine the seals and burner gasket, replace if necessary. 5. Reassemble in reverse order, ensuring that the injector is in place. 13.6 injector (Fig. 48) 1. Remove the collector and fan assembly as described in section 13.4. 2. Extract and replace the injector and reassemble in reverse order. Cover Gas Inlet Fan Venturi Injector Collector When fitting the venturi ensure that the arrow is pointing forward Fig. 48 Fig. 49 Gas Inlet Pipe Venturi Injector Fig. 50
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35 © Baxi Heating UK Ltd 2020 13.0 Changing Components 13.7 Burner (Fig. 51) 1. Undo the screws securing the collector to the venturi and extension piece. Allow the air pressure switch to rest on the air box lower panel. Remove the extension piece from the cover (not 28/32 model). 2. Withdraw the burner from the cover and replace with the new one. 3. Examine the gasket, replacing if necessary. 4. Reassemble in reverse order. 13.8 insulation (Fig. 52) 1. Remove the electrode leads, noting their positions. Also remove the electrodes as described in section 13.2. 2. Undo the screws securing the collector to the venturi and the nuts holding the cover to the heat exchanger. Allow the air pressure switch to rest on the air box lower panel (not 32 models). Draw the collector and cover assembly away. 3. Remove the cover insulation piece. 4. Fit the new insulation carefully over the burner and align it with the slots for the electrodes. 5. If the rear insulation requires replacement remove it and all debris from the heat exchanger. Also it may be necessary to separately remove the spring clip from the pin in the centre of the heat exchanger and the ‘L’ shaped clips embedded in the insulation. 6. DO NOT remove the shrink-wrapped coating from the replacement rear insulation. Keep the insulation vertical and press firmly into position. 7. Examine the cover seal and replace if necessary. Fig. 51 Cover Burner Gasket Extension Piece (Not on 28 model) Collector Venturi Heat Exchanger Rear Insulation Cover Insulation Seal Collector Spark Electrode Sensing Electrode Electrode Leads Venturi Fig. 52
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36 © Baxi Heating UK Ltd 2020 13.0 Changing Components 13.9 Flue/Heat Exchanger Thermostat Sensor (Fig. 53) 1. Ease the retaining tab on the sensor away and disconnect the electrical plug. 2. Turn the sensor 90° anticlockwise to remove - it is a bayonet connection. 3. Reassemble in reverse order. 13.10 Water Pressure Sensor (Fig. 55) 1. Drain the primary circuit. 2. Disconnect the two wires from the sensor. 3. Undo the nut on the flow pipe securing and sealing the sensor. 4. Remove the sensor, examine the sealing washer, replacing if necessary. 5. Reassemble in reverse order. The component is not polarised - either wire will fit each terminal. 13.11 Central Heating Temperature Sensor (NTC) (Fig. 54) 1. Ease the retaining tab on the sensor away and disconnect the electrical plug. 2. Unscrew the sensor from it’s pocket and reassemble in reverse order. The plug will only fit one way. 13.12 Safety Thermostat (Fig. 54) 1. Pull the plug off the thermostat. 2. Remove the screws securing the thermostat to the mounting plate on the flow pipe. 3. Reassemble in reverse order, ensuring that the plug is pushed fully on. 13.13 Return Heating Temperature Sensor (Fig. 56) 1. Ease the retaining tab on the sensor away and disconnect the electrical plug. 2. Prise the sensor retaining clip off the pipe and remove the sensor from the clip. 3. Reassemble in reverse order. Central Heating Temperature Sensor Safety Thermostat Flow Pipe Fig. 54 Flue/Heat Exchanger Thermostat Sensor Electrical Plug Fig. 53 Fig. 56 Return Heating Temperature Sensor Fig. 55 Pressure Sensor
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37 © Baxi Heating UK Ltd 2020 13.0 Changing Components 13.14 Pump - Complete (Fig. 58) 1. Drain the boiler primary circuit and disconnect the electrical plugs from the pump motor. 2. Undo the two screws securing the body to the pipe and manifold and draw the pump forwards. 3. Unscrew the automatic air vent from the pump body. 4. Examine the ‘O’ ring seals on the return pipe and manifold, replacing if necessary. 5. Fit the air vent to the pump body and reassemble in reverse order. 13.15 automatic air Vent (Fig. 58) 1. Drain the primary circuit and unscrew the automatic air vent from the pump body. 2. Examine the ‘O’ ring seal, replacing if necessary, and fit it to the new automatic air vent. 3. Reassemble in reverse order. Automatic Air Vent Fig. 58
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38 © Baxi Heating UK Ltd 2020 13.0 Changing Components 13.16 Pressure Gauge (Figs. 59 & 60) 1. Drain the primary circuit and undo the nut on the pressure gauge capillary. 2. Undo the screws securing the gauge retaining bracket. 3. Remove the bracket and gauge assembly. Depress the barbs on the side of the gauge and remove the retaining bracket. 4. Examine the sealing washer, replace if necessary. 5. Reassemble in reverse order. 13.17 Pressure Relief Valve (Fig. 61) 1. Drain the primary circuit. 2. Disconnect the discharge pipe from the valve. Using a suitable hexagon key undo the grub screw sufficiently to release the valve. 3. Note the orientation of the valve, rotate it and withdraw it from the manifold. 4. Fit the new valve and ‘O’ ring seal and set to the previously noted orientation. Reassemble in reverse order. 13.18 P.C.B. (Fig. 62) 1. Note the settings of the temperature control knobs, rotate them fully anticlockwise and carefully pull them off the drive pins. 2. Completely undo the screws securing the control box cover and release the cover retaining barbs from their slots. Disengage the rear of the cover from the control box hinge pin (Fig. 62). 3. Note the position of all plugs and wires on the P.C.B. and disconnect them. 4. Undo the securing screws and remove the P.C.B. Transfer the control knob drive pins to the new P.C.B. and turn them fully anticlockwise. 5. Reassemble in reverse order, ensuring that the temperature controllers are reset to their previous positions. 13.19 Selector Switch (Fig. 63) 1. Note the setting of the selector switch knob and carefully pull it off the facia. 2. Completely undo the screws securing the control box cover and release the cover retaining barbs from their slots. Disengage the rear of the cover from the control box hinge pin (Fig. 62). 3. Note the position of the electrical connections and the orientation of the switch. Remove the electrical connections. 4. Remove the screws securing the switch to the facia panel. 5. Fit the new switch, ensuring that it is correctly positioned and reassemble in reverse order. Pressure Gauge Gauge Retaining Bracket Fig. 60 Fig. 59 Fig. 61 Pressure Gauge Capillary ‘O’ Ring Seal Discharge Pipe Grub Screw Control Box Cover P.C.B. Selector Switch Facia Selector Switch Knob Temperature Control Knobs Fig. 62 Fig. 63 Drive Pins Pump P.C.B.
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39 © Baxi Heating UK Ltd 2020 13.0 Changing Components 13.20 Gas Valve (Fig. 64) iMPORTaNT: after replacing the valve the CO2 must be checked and adjusted as detailed in Section 14.0 Setting the Gas Valve. Only change the valve if a suitable calibrated combustion analyser is available, operated by a competent person - see section 12.1. 1. Turn the gas cock off and undo the nut on the gas feed elbow under the boiler. 2. Remove the screws securing the inlet pipe flange to the boiler bottom panel. 3. Pull off the earth lead and sensing pipe. 4. Undo the nut on the venturi inlet pipe and slacken the nut on the venturi. Ease the pipe aside and remove the gas valve. 5. Remove the outlet adaptor and inlet pipe and transfer them to the new valve. Examine the ‘O’ ring seals, replace if necessary. 6. Reassemble in reverse order. NOTE: To assist the boiler to light prior to final setting, use a suitable hexagon key to wind out the Throttle Adjustment Screw until it is flush with the valve body, then turn the screw 4 full turns clockwise (Fig. 65). If the boiler will not light, or the correct CO2 cannot be achieved contact the Baxi Customer Support 0344 871 1545. 13.21 Expansion Vessel (Fig. 66) 1. Drain the primary circuit and undo the nut on the vessel connection pipe. 2. Undo and remove the locknut securing the vessel spigot to the boiler air box. 3. Remove the bracket and vessel from the boiler. 4. Locate the retaining bracket on the upper flange of the vessel and fit to the boiler. 5. Reassemble in reverse order. Fig. 64 Expansion Vessel Boiler Chassis Lock Nut Fig. 66 Retaining Bracket Fig. 65 Throttle Adjustment Screw Gas Valve Gas Feed Elbow Earth Lead Sensing Pipe Venturi Inlet Pipe Power Lead
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40 © Baxi Heating UK Ltd 2020 14.0 Setting the Gas Valve Selector Switch Display bar 0 1 2 3 4 Central Heating Temperature Control Calibration Control Fig. 68 Fig. 69 Fig. 70 Fig. 71 Fig. 72 Central Heating Temperature Control Calibration Control Fig. 67 x 2 Fig. 73 Flue Adaptor Test Point Plug Analyser Probe 14.1 Setting the Gas Valve (CO2 check) iMPORTaNT: The CO2 must be only be checked and adjusted to set the valve if a suitable calibrated combustion analyser is available, operated by a competent person - see Section 14.1 1. The combustion (CO2) may be checked after running the boiler for several minutes. To do this it is necessary to set the boiler to ‘Calibration Mode’. 2. Ensure that all external controls are calling for heat. The actual current boiler temperature is shown on the display. 3. Turn both control knobs fully anticlockwise, then quickly turn the right hand knob 1/4 clockwise twice and back fully anticlockwise (Fig. 67). 4. The display will now alternate between ‘SF’ and the current boiler temperature and both green LEDs will flash (Figs. 68 & 69). 5. Turn the left hand knob fully clockwise. As the knob is turned the display will change, indicating the fan speed. 6. The display will show ‘00’, indicating maximum rate, then revert to ‘P ‘ alternating with the current boiler temperature (Figs. 70, 71 & 72). 7. Remove the plug from the flue sampling test point. Insert the analyser probe and allow sufficient time for the reading to settle (Fig. 73). The CO2 should be 8.7% ± 0.2 8. It is possible to alter the CO2 by adjustment of the gas valve. Remove the plastic cover from the Throttle Adjustment Screw. At maximum rate the Throttle Adjustment Screw should be turned, using a suitable hexagon key, until the correct reading is obtained (Fig. 74). Turning clockwise will reduce the CO2. Anticlockwise will increase th e CO2. 9. The CO2 must then be checked at minimum rate. Turn the left hand knob fully anti-clockwise. As the knob is turned the display will change, indicating the fan speed. When the display reads ‘ 0’ the boiler runs at minimum rate. The CO2 should be 8.4% ± 0.2 10. With the boiler on minimum, the Offset Adjustment Screw must be altered, using a suitable hexagon key, after removing the cap (Fig. 74). Turning anti-clockwise will reduce the CO2. Clockwise will increase th e CO2. 11. The ‘Calibration Function’ is maintained for 20 minutes unless the maximum CH temperature is exceeded. The function can be disabled at any time by turning the right hand knob. 12. Check the Combustion Performance (CO/CO2 ratio). This must be less than 0.004. Throttle Adjustment Screw (cover removed) Offset Adjustment Screw (cap fitted) Gas Valve Fig. 74 If the CO2 is reset at minimum rate it must be rechecked at maximum rate again and adjusted if required. If the CO2 is reset at maximum rate it must be rechecked at minimum rate and adjusted if required. Do not turn the adjustment screws more than 1/8 of a turn at a time. Allow the analyser reading to settle before any further adjustment Reduce CO2 at min. rate increase CO2 at min. rate Reduce CO2 at max. rate increase CO2 at max. rate
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41 © Baxi Heating UK Ltd 2020 15.0 Electrical Central Heating NTC Sensor Flue Sensor r r b w Ignition Electrode w g or w b b Air Pressure Switch 2 1 Control PCB X2 X3 X501 1 2 1 2 3 3 4 4 5 5 6 7 8 9 X1 1 2 Gas Valve Overheat Stat X401 bk bk b br bk g b br g/y b br b br br b b br b br r bk r bk Spark Generator 9 10 8 7 6 5 4 3 2 1 N L 1 4 2 5 3 1 2 a b Link bk b g/y br Mains Input Cable X9 Return Heating Temperature Sensor X400 g g b b Water Pressure Switch 9 8 7 6 5 4 3 2 1 Fan b b br br Pump g/y br b X700 1 2 br b P1 C1 b - brown - black - blue - white br bk b w - green - green / yellow - red g g/y r 15.1 illustrated Wiring Diagram
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42 © Baxi Heating UK Ltd 2020 16.0 Short Parts List Short Parts List Key G.C. Description Manufacturers No. No. Part No. 302 Flue Thermostat 5114747 306 Burner 7682285 311 Fan 5121447 315 Igniter Electrode 720222801 316 Sensing Electrode 720222901 415 Pump 7713520 419 Water Pressure Switch 5114748 420 Overheat Thermostat 248079 421 NTC Sensor 5114725 422 Gas Valve 720301001 434 NTC Sensor (Return) 5114726 503 PCB 7692731 504 Pressure Gauge 5118385 326 Air Pressure Switch 7648326 306 315 316 311 422 419 415 302 421 420 503 504 434 326
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43 © Baxi Heating UK Ltd 2020 17.0 Fault Finding NOTE: When instructed to turn the selector to the reset position turn the selector switch fully anticlockwise against the spring pressure to the reset position and hold for 5 seconds to reset the boiler. 17.1 initial Fault Finding Checks 1. Check that gas, water and electrical supplies are available at the boiler. 2. Electrical supply = 230V ~ 50 Hz. 3. CH water system pressurised to 0.5 bar minimum when the boiler is cold. 4. The preferred minimum gas pressure is 20 mbar. 5. Carry out electrical system checks, i.e. Earth Continuity, Resistance to Earth, Short Circuit and Polarity with a suitable meter. NOTE: These checks must be repeated after any servicing or fault finding. 6. Ensure all external controls are calling for heat and check all external and internal fuses. Before any servicing or replacement of parts, ensure the gas and electrical supplies are isolated. 17.2 Error Codes 1. If a fault occurs on the boiler an error code may be shown by the facia display. 2. The codes are either two or three digit, preceded by the letter 'E'. For example, code E133 will be displayed by 'E1' alternating with '33'. E20 is shown as 'E' then '20' E20 indicates faulty components. E28 includes possible faulty components or blockage. E110 shows overheat of the primary water and E130 overheat of the flue system. E119 is displayed when the primary water pressure is less than 0.5 bar. E133 indicates that the gas supply has been interrupted, ignition has failed or the flame has not been detected. E125 is displayed in either of two situations:- i) If within 15 seconds of the burner lighting the boiler temperature has not changed by 1°. ii) If within 10 minutes of the burner lighting the boiler temperature twice exceeds the selected temperature by 30°. In these instances poor primary circulation is indicated. 3. By turning the selector switch to the 'Reset' position for a minimum of 5 seconds when E110, E130 & E133 are displayed it is possible to relight the boiler. 4. If this does not have any effect, or the codes are displayed regularly further investigation is required. Central Heating NTC Fault Flue NTC Fault, Air Pressure Switch Fault, Blocked Flue, Blocked Condensate or Wiring Fault Safety Thermostat Operated Water Pressure Switch Not Operated Circulation Fault (Primary Circuit) Flue NTC Operated Interruption Of Gas Supply or Flame Failure Fan or Fan Wiring Fault Pre-Circulation Fault E20 E28 E110 E119 E125 E130 E133 E160 E193 Table Of Error Codes To check the Air Pressure Switch is operating correctly:- During normal operation or standby briefly apply light suction to the negative pressure spigot (P2). Error Code “E28” should display whilst suction is applied, and then disappear when the switch is remade (removal of suction). Testing air Pressure Switch P2 - Negative Pressure 3 1 2 Connect to terminals 1 & 2 (3 not used)
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44 © Baxi Heating UK Ltd 2020 17.0 Fault Finding Refer to Section 15.0 “Illustrated Wiring Diagram” for position of terminals and components Central Heating - Follow operational sequence Turn selector switch to The display illuminates Error 20, 28 or 50 flashing Error 119 flashing Burner lights Error 110 flashing Error 130 flashing Error 133 flashing Turn Central Heating thermostat to Maximum. Pump runs Fan runs Spark at ignition electrodes for up to 5 seconds and for 3 attempts 3-way valve is open to Central Heating circuit Go to section ‘A’ Go to section ‘E’ Ensure all controls and integral clock are calling for heat Go to section ‘K’ Go to section ‘B’ Error 160 flashing Go to section ‘D’ Error 28 flashing Go to section ‘E’ Error 133 flashing Burner does not stay alight after 5 seconds Error 133 flashing Go to section ‘I’ Operation sequence successful If the error 110 is still flashing. Go to section ‘J’ Fan runs at correct speed YES YES NO NO NO YES YES YES YES YES YES YES YES NO YES YES YES YES NO NO NO NO NO Burner output modulates to maintain the temperature set Burner goes out Go to section ‘C’ Ensure controls are set to demand and verify the contacts are closed Error 160 flashing Go to section ‘L’ Error 28 flashing Go to section ‘E’ YES Go to section ‘H’ Turn the selector switch to reset Go to section ‘F’ Error 130 flashing Go to section ‘M’ Error 28 flashing Go to section ‘E’ YES Check the Central Heating NTC sensor Go to section ‘E’ Fan stops after 10 seconds Pump continues to run for approximately 3 minutes (room thermostat open) NO NO YES NO YES YES Turn the selector switch to reset position for 5 seconds NO Error E125 or E193 flashing Ensure that primary circulation is OK & that there is no blockage YES Pump runs continuously NO Check wiring from X700 to pump is OK & connected YES
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45 © Baxi Heating UK Ltd 2020 17.0 Fault Finding Fault Finding Solutions Sections Is there 230V at: Main terminals L and N Check electrical supply 1. NO Main terminal fuse Replace fuse Replace PCB Display illuminated 2. NO PCB - X1 connector terminals 1,2 Check wiring 3. NO NO a CH system pressure less than 0.5 bar Re-pressurise system 1. YES Check the tap of the automatic air vent is opened Open the automatic air vent 2. NO C 1. NO YES Fan connections correct at fan. PCB - X2 connector, is 230V AC across terminals 5 & 7 Fan jammed or faulty winding Replace PCB Replace fan YES D NO Replace water pressure switch Check connection water pressure switch terminal COM - NO and PCB connector X400 terminals 3,4 YES Is there 230V at: C1 Connection Pump Wiring NO YES B Check incoming wiring P1 Connection on Pump NO Replace Harness YES Replace Pump
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46 © Baxi Heating UK Ltd 2020 17.0 Fault Finding Gas at burner Ensure gas is on and purged Replace PCB Replace gas valve PCB - X3 connector is 230V AC across terminals 1 & 2 YES NO NO F Replace PCB G Check and correct if necessary 1. Ignition electrode and lead 2. Electrode connection 3. Spark gap and position YES NO Replace igniter YES Check and correct the connection of the tube between the venturi and gas valve 1. 2. Voltage at PCB - X2 connector is at least 100V DC across terminals 2 & 5 (Note: from multimeter connect ‘common’ to 2 & ‘volt’ to 5) Check wiring 7.5 ±1 4 ±0.5 10 ±1 Spark Ignition Electrode Sensing Electrode Electrode Position Viewing Window Burner Temperature sensors faulty. Cold resistance approximately 10kΩ @ 25° C (DHW and CH sensors) 20kΩ @ 25° C (Flue sensor) (resistance reduces with increase in temp.) NO E Replace sensor NO Replace switch Flue blocked or damaged YES Unblock or repair flue Condensate trap or pipework blocked YES Unblock Air Pressure Switch faulty. Check for continuity across terminals 1 & 2
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47 © Baxi Heating UK Ltd 2020 17.0 Fault Finding Check and correct if necessary 1. The mechanical set of the gas valve (CO2 values - see instruction) 2. Flame sensing electrode and lead connections 3. Flame sensing electrode position Flame current should be more than 0.5 µ A Replace PCB Replace PCB YES YES Replace flame sensing electrode NO Check supply pressure at the gas valve: Minimum 17mbar i Replace safety thermostat YES NO Overheat thermostat operated or faulty, i.e. continuity across thermostat terminals Allow to cool. Continuity across thermostat terminals more than 1.5 ohm J K Fan connections correct at fan. PCB - X401 connector terminals 5,6,7 & 8 1. YES Replace fan Temperature sensors faulty. Cold resistance approximately 10kΩ @ 25° C (CH sensor) 20kΩ @ 25° C (Flue sensor) (resistance reduces with increase in temp.) NO Replace sensor YES If pump is running the heat exchanger could be obstructed Replace heat exchanger 1. 2. 1. 2. 1. H
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48 © Baxi Heating UK Ltd 2020 © Heating and Hotwater Industry Council (HHIC) 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.
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49 © Baxi Heating UK Ltd 2020 © 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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50 © 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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51 © 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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7753842-01 (2/20) 0085 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.
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