Baxi
Інструкція Baxi Instruction Baxi Megaflo System GA Installation and Service Manual
Архівний PDF-документ для ознайомлення.
Інструкція · Українська · Оновлено: 11 серпня 2026 р.
Оригінальний PDF
Завантаження PDF…
Залишити заявку майстру
Потрібна діагностика або допомога з інструкцією? Передайте майстру модель котла та код помилки.
Текст інструкції для пошуку
Сторінка 1
27 10.0 Commissioning © Baxi Heating UK Ltd 2014 10.2 Checking the Combustion - ‘Chimney Sweep’ Function 1. To set the boiler to operate at MAXIMUM and MINIMUM, press & together and hold for at least 6 seconds. ‘On’ will be displayed briefly, followed by ‘304’ then the boiler output expressed as percentage i.e. ‘100’. 2. Press until ‘00’ is displayed, indicating minimum input. 3. To exit the function press & together for 6 seconds. 4. The combustion (CO level and CO/CO2 ration) must be measured and recorded at MAXIMUM DHW input and MINIMUM input. 5. Follow the flow chart on the next page to comply with the requirement to check combustion on commissioning. 6. The system MUST be cold to ensure the boiler is operating under full demand Fig. 36a Plug Analyser Probe Flue Sampling Point
Сторінка 1 PDF
Сторінка 2
28 10.0 Commissioning © Baxi Heating UK Ltd 2014 Set Boiler to Maximum Rate (see 10.2.1) 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 0844 871 1555 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 0844 871 1555 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 0844 871 1555. Set Boiler to Minimum Rate (see 10.2.2) 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 the Combustion - ‘Chimney Sweep’ Function (cont) 1. This procedure is mandatory in GB from April 2014. It is strongly recommended to perform the procedure before that date.
Сторінка 2 PDF
Сторінка 3
29 10.0 Commissioning © Baxi Heating UK Ltd 2014 Fig. 37 Fig. 38 Inlet Gas Pressure Test Point DO NOT check gas pressure here 1. It may be necessary to adjust the boiler gas type if the supply is changed, for example when Natural Gas is provided to a rural area previously reliant on Propane. In these instances a replacement Gas Type Label may be required, which is available on request as a spare part.. 2. Press & and hold for at least 6 seconds. will be displayed, alternating with . 3. Press to select the next parameter . Press . 4. Press or to select the value that corresponds with the required gas type. For Natural Gas:- For Propane:- 5. Press to save the change, then to return to the normal display. R Changing the Gas Type 10.3 Check the Operational (Working) Gas Inlet Pressure & Gas Rate Note: The system MUST be cold to ensure the boiler is operating under full demand. 1. Press & together and hold for at least 6 seconds. ‘On’ will be displayed briefly, followed by ‘304’ then ‘100’ when the boiler is lit, indicating the output is at MAXIMUM (‘Chimney Sweep Function’). 2. With the boiler operating in the maximum rate condition check that the operational (working) gas pressure at the inlet gas pressure test point on the gas cock or valve is in accordance with B.S. 6798 & B.S. 6891. This must be AT LEAST 17mb ! (LPG - 37mb) Measure the Gas Rate 4. With any other appliances & pilot lights turned OFF the gas rate can be measured. It should be:- Natural Gas 12 model 1.27 m3/h 15 model 1.59 m3/h 18 model 1.90 m3/h 24 model 2.54 m3/h 28 model 2.96 m3/h 32 model 3.40 m3/h Propane 12 model 0.93 kg/h 15 model 1.17 kg/h 18 model 1.4 kg/h 24 model 1.86 kg/h 28 model 2.18 kg/h 32 model 2.49 kg/h 5. Press & together and hold for at least 6 seconds to exit the function. 6. Carefully read and complete all sections of the Benchmark Commissioning Checklist at the rear of this publication that are relevant to the boiler and installation. These details will be required in the event of any warranty work. The publication must be handed to the user for safe keeping and each subsequent regular service visit recorded. 7. 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. N.G. Factory Set When reset for L.P.G. Gas Type Label
Сторінка 3 PDF
Сторінка 4
30 © Baxi Heating UK Ltd 2014 Fig. 39 Facia Panel Case Front Panel 11.0 Completion & System Draining 11.1 Completion 1. Replace the case front panel, and secure with the screws previously removed. 2. This publication must be handed to the user for safe keeping and each subsequent regular service visit recorded. 3. Set the central heating and hot water temperatures to the requirements of the user. Instruct the user in the operation of the boiler and system. 4. Instruct the user in the operation of the boiler controls. Hand over the User’s Operating, Installation and Servicing Instructions, giving advice on the necessity of regular servicing. 5. Demonstrate to the user the action required if a gas leak occurs or is suspected. Show them how to turn off the gas supply at the meter control, and advise them not to operate electric light or power switches, and to ventilate the property. 6. Show the user the location of the system control isolation switch, and demonstrate its operation. 7. Advise the user that they may observe a plume of vapour from the flue terminal, and that it is part of the normal operation of the boiler. 11.2 System Draining 1. If at any time after installation it is necessary to drain the central heating system (e.g. after replacing a radiator) the De-Aeration Function should be activated. 2. On refilling the system ensure that there is no heating or hot water demand, but that there is power to the boiler. 3. Press & together and hold for at least 6 seconds. The ‘De-Aeration’ Function will be activated. 4. The boiler pump will run for up to 10 minutes. This will purge air from the system. The display will show . 5. Once De-Aeration is complete set the external controls as required by the user. The button can be pressed so that the display shows the following information:- 1 press - ‘00’ alternates with Sub-Code (only when fault on boiler) or ‘000’ 2 presses - ‘01’ alternates with CH Flow Temperature 3 presses - ‘02’ alternates with Outside Temperature (where Sensor fitted) 4 presses - ‘03’ alternates with DHW Temperature 5 presses - ‘04’ alternates with DHW Temperature 6 presses - ‘05’ alternates with System Water Pressure 7 presses - ‘06’ alternates with CH Return Temperature 8 presses - ‘07’ alternates with Flue Temperature 9 presses - ‘08’ alternates with Heat Exchanger Temperature To change the information displayed see the table below:-
Сторінка 4 PDF
Сторінка 5
31 12.0 Servicing © Baxi Heating UK Ltd 2014 12.1 Annual Servicing 1. For reasons of safety and economy, it is recommended that the boiler is serviced annually. Servicing must be performed by a competent person in accordance with 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 (check air inlet sample). • 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 10.2.1 to 10.2.7 and the gas rate as described in 10.2.8. • 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 14.1.1 to 14.1.6. 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 13.23) & 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. Remove the screws securing the case front panel. Lift the panel slightly to disengage it from the studs on top of the case (Fig. 40) and hinge down the Control Box. 4. Disconnect the condensate drain pipe and unscrew the sump from the bottom of the condensate trap assembly (Fig. 41). Remove any deposits from the sump and trap. Clean as necessary and replace the sump. Fig. 40 Case Front Panel Case Front Panel Securing Screws Fig. 41 Condensate Trap Control Box removed for clarity Gasket Sump Flue Sampling Point Air Sampling Point
Сторінка 5 PDF
Сторінка 6
32 12.0 Servicing © Baxi Heating UK Ltd 2014 12.2 Annual Servicing Inspection (Cont) 5. Remove the clip securing the gas feed pipe to the air/gas venturi. Disconnect the pipe. Do not break the joint between the pipe and gas valve unless necessary. 6. Disconnect the electrode leads, noting their position, and the fan electrical plugs (Fig. 43). 7. Undo the four nuts retaining the combustion box cover to the heat exchanger. 8. Carefully draw the fan, collector and cover assembly forward (Figs. 43). 9. Clean any debris from the heat exchanger and check that the gaps between the tubes are clear. 10. Inspect the burner, electrodes position and insulation, cleaning or replacing if necessary. Clean any dirt or dust from the air box. 11. Carefully examine all seals, insulation & gaskets, replacing as necessary. Look for any evidence of leaks or corrosion, and if found determine & rectify the cause. 12. Reassemble in reverse order, ensuring the front case panel is securely fitted. 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. Control Box removed for clarity Fig. 43 Fan, Collector and Cover Assembly Electrode Leads Electrode Position Fig. 42 Gas Feed Pipe Securing Clip 5 ±1 4 ±0.5 10 ±1 Spark Ignition Electrode Flame Sensing Electrode
Сторінка 6 PDF
Сторінка 7
33 13.0 Changing Components © Baxi Heating UK Ltd 2014 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 recommission the boiler as described in Section 10.0. Always examine any seals or gaskets, replacing where necessary. The Case Front Panel MUST seal effectively against the air box side panels. See Section 12.1 “Annual Servicing” for removal of case panel, door etc. 13.1 Spark Ignition and Flame Sensing Electrodes (Fig. 44) 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. 4. After changing the Flame Sensing Electrode check the combustion - see Section 14.1. 5. When satisfactory combustion readings are not obtained ensure the electrode position is correct and perform the combustion check again. 13.2 Fan (Fig. 45) 1. Remove the clip securing the gas feed pipe to the air/gas venturi. Disconnect the pipe. 2. Undo the screws securing the air/gas collector to the cover (32) or extension piece (12 - 28) and disconnect the fan electrical plugs. 3. Remove the collector and fan assembly, being careful to retain the gasket. 4. Undo the screws securing the fan to the collector. Retain the gasket. 5. Undo the screws securing the venturi to the fan (noting its position) and transfer to the new fan, replacing the seal if necessary. 6. Examine the gasket(s) and replace if necessary. 7. Reassemble in reverse order and perform the Calibration Function - see Section 14.2. 13.3 Air/Gas Venturi (Figs. 45 & 46) 1. Remove the clip securing the gas feed pipe to the venturi. 2. Undo the screws securing the collector to the cover (32) or extension piece (12 - 28) and disconnect the fan electrical plugs. 3. Remove the collector and fan assembly, being careful to retain the gasket. 4. Undo the screws securing the venturi to the fan (noting its position) and fit the new venturi, replacing the seal if necessary. 5. Examine the gasket and replace if necessary. 6. After changing the venturi check the combustion - see Section 14.1. Fig. 44 Electrode Leads Spark Ignition Electrode Flame Sensing Electrode Cover Fan Air/Gas Collector Fig. 45 Air/Gas Venturi Gasket Gas Feed Pipe Control Box removed for clarity Venturi Gasket Fan Fig. 46
Сторінка 7 PDF
Сторінка 8
34 13.0 Changing Components © Baxi Heating UK Ltd 2014 13.4 Burner (Fig. 47) 1. Remove the clip securing the gas feed pipe to the air/gas venturi and disconnect the fan electrical plugs. 2. Undo the screws securing the air/gas collector to the cover (32 ) or extension piece (12 - 28). Remove this extension piece from the cover (on 12 - 28 models). 3. Withdraw the burner from the cover and replace with the new one. 4. Examine the gasket(s), replacing if necessary. 5. After changing the burner check the combustion - see Section 14.1. 13.5 Insulation (Fig. 48) 1. Remove the clip securing the gas feed pipe to the air/gas venturi and disconnect the fan electrical plugs. 2. Remove the electrodes as described in section 13.1. 3. Undo the nuts holding the cover to the heat exchanger. Draw the air/gas collector, fan and cover assembly away. 4. Remove the cover insulation piece. 5. Fit the new insulation carefully over the burner and align it with the slots for the electrodes. 6. 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. 7. Do not remove the shrink-wrapped coating from the replacement rear insulation. Keep the insulation vertical and press firmly into position. 8. Examine the cover seal and replace if necessary. Reassemble in reverse order. Fig. 47 Heat Exchanger Rear Insulation Cover Insulation Seal Air/Gas Collector Electrode Leads Fig. 48 Control Box removed for clarity Cover Burner Gasket Extension Piece (12 - 28 models) Air/Gas Collector Gasket Spark Ignition Electrode Flame Sensing Electrode
Сторінка 8 PDF
Сторінка 9
35 13.0 Changing Components © Baxi Heating UK Ltd 2014 13.6 Flue Sensor (Fig. 49) 1. For ease of access on 12 - 28 models remove the Expansion Vessel as described in Section 13.17. 2. Ease the retaining tab on the sensor away and disconnect the electrical plug. 3. Turn the sensor 90° anticlockwise to remove - it is a bayonet connection. 4. Reassemble in reverse order. 13.7 Heating Flow & Return Sensors (Fig. 50) 1. There is one sensor on the flow (red wires) and one sensor on the return (blue wires). Note: For access to the return sensor on 12 - 28 models first remove the fan and air/gas collector (see 13.2). 2. After noting the position prise the sensor clip off the pipe and disconnect the plug. 3. Connect the plug to the new sensor and ease the clip onto the pipe as close to the heat exchanger as possible. 13.8 Safety Thermostat (Fig. 51) 1. Pull the plug off the safety 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. 13.9 Hydraulic Pressure Sensor (Fig. 52) 1. Close the flow and return isolation taps and drain the primary circuit. Remove the fan and heat exchanger flow pipe. 2. Remove the plug from the sensor and pull the retaining clip forwards. The clip is captive and does not need to be fully removed. 3. Reassemble in reverse order. Flue Sensor Electrical Plug Fig. 49 Heating Flow Sensor Fig. 50 Control Box removed for clarity Fig. 51 Safety Thermostat Securing Clip (captive) Fig. 52 Hydraulic Pressure Sensor Plug
Сторінка 9 PDF
Сторінка 10
36 13.0 Changing Components © Baxi Heating UK Ltd 2014 Socket Headed Screw Pump Head Pump Body Automatic Air Vent Fig. 53 Fig. 54 Electrical Supply Plug Pump Flow Pipe 13.10 Pump - Head Only (Fig. 53) 1. Disconnect the electrical supply plug from the pump. 2. Close the flow and return isolation taps and drain the boiler primary circuit. Remove the socket head screws securing the pump head to the body and draw the head away. 3. Reassemble in reverse order. 13.11 Pump - Complete (Fig. 54) 1. Disconnect the electrical supply plug from the pump. 2. Close the flow and return isolation taps and drain the boiler primary circuit. For ease of access remove the heating pressure gauge (13.14). 3. Undo the three screws securing the body to the inlet assembly and pump flow pipe. Draw the complete pump forwards. 4. Pull off the securing clip and remove the automatic air vent. Transfer them to the new pump body. 5. Examine the ‘O’ ring seals, replacing if necessary and reassemble in reverse order. 13.12 Automatic Air Vent (Fig. 54) 1. For access on 12 - 28 models see Section 13.17 to remove the expansion vessel. Close the flow and return isolation taps and drain the primary circuit. 2. The automatic air vent is a bayonet fitting. Remove by twisting anticlockwise. 3. Fit the new automatic air vent, ensuring the ‘O’ ring is fitted and the cap is open . Reassemble in reverse order. Control Box removed for clarity
Сторінка 10 PDF
Сторінка 11
37 13.0 Changing Components © Baxi Heating UK Ltd 2014 13.13 Safety Pressure Relief Valve (Fig. 55) 1. Close the flow and return isolation taps and drain the primary circuit. 2. For access remove the screws securing the condensate trap, and pull off the pipe from the heat exchanger. Ease the trap to one side. 3. Disconnect the discharge pipe from the pressure relief valve and remove the sealing grommet. 4. Pull off the clip retaining the valve and withdraw it from the outlet assembly. 5. Fit the new valve and ‘O’ ring seal and reconnect the discharge pipe. Ensure the grommet is correctly refitted to maintain the integrity of the case seal. Refit the condensate trap. 13.14 Heating Pressure Gauge (Figs. 56 & 57) 1. Close the flow and return isolation taps and drain the primary circuit. 2. Remove the gauge from the boiler lower panel. 3. Remove the clip securing the pressure gauge capillary. 4. Fit the new gauge, ensuring that the capillary is routed to prevent any sharp bends. Reassemble in reverse order and ensure the gauge is firmly in position to maintain the integrity of the case seal. Fig. 57 Heating Pressure Gauge Capillary Clip Clip ‘O’ Ring Seal Pressure Relief Valve Discharge Pipe Control Box removed for clarity Fig. 55 Fig. 56 Heating Pressure Gauge
Сторінка 11 PDF
Сторінка 12
38 13.0 Changing Components © Baxi Heating UK Ltd 2014 13.15 P.C.B. & R.D.S. (Removable Data Stick) (Fig. 58) NOTE: Both P.C.B. and R.D.S. are available as spare parts. The P.C.B. is suitable for any boiler model. An R.D.S. specific to the boiler model output & gas type will be required if the R.D.S. from the original P.C.B. is not being transferred. It is recommended that P.C.B. and R.D.S. are replaced together. 1. Ensure that the power to the boiler is isolated and wait 10 seconds. 2. Remove the screws securing the control box cover and release the cover retaining barbs from their slots. 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. IMPORTANT: If only the P.C.B. is being replaced transfer the R.D.S. from the original board to the new one. Where both P.C.B. and R.D.S. are being replaced ensure the new R.D.S. is on new the board. 5. Reassemble in reverse order. Ensure that the ignition lead is connected correctly. 6. P.C.B. ONLY changed - Check the Combustion - see Section 14.1. 7. P.C.B. & R.D.S. changed - enable the Calibration Function as described in Section 14.2, then Check the Combustion - see Section 14.1. Fig. 58 X23 X37 X36 X22 X20 X24 X10 X11 X12 X13 X1 X2 X3 Note the correct orientation of the R.D.S. Position with the chamfer as shown. R.D.S.
Сторінка 12 PDF
Сторінка 13
39 13.0 Changing Components © Baxi Heating UK Ltd 2014 13.16 Gas Valve (Fig. 59) IMPORTANT: After replacing the valve the CO2 must be checked and adjusted as detailed in Section 14.0 Combustion & Calibration. Only change the valve if a suitable calibrated combustion analyser is available, operated by a competent - see section 12.1. 1. Turn the gas cock off and undo the nut under the boiler. Retain the washer. 2. Remove the electrical plug from the valve. 3. Undo the nut on the gas feed pipe and ease the pipe aside. It is recommended that the injector washer is changed as well. 4. Remove the screws securing the gas valve to the boiler bottom panel. 5. Reassemble in reverse order, ensuring the injector washer is in place, and perform the Calibration Function & Combustion Check - see Sections 14.1 & 14.2. NOTE: Check for gas tightness after replacing gas valve. 13.17 Expansion Vessel (Fig. 60) 1. Close the flow and return isolation taps and drain the primary circuit. 2. Prise off the securing clip and disconnect the braided hose from the vessel. 3 . Whilst supporting the vessel undo the locknut and manoeuvre the vessel out of the boiler. 4. Reassemble in reverse order. Gas Valve Gas Cock Fig. 59 Electrical Plug Expansion Vessel Lock Nut Fig. 60 Washer Injector Washer Gas Feed Pipe NOTE: The Injector Washer MUST be fitted as shown between the Valve & Pipe. DO NOT fit the Injector Washer between the Gas Cock & Valve
Сторінка 13 PDF
Сторінка 14
40 © Baxi Heating UK Ltd 2014 Fig. 61 Plug Analyser Probe 14.0 Combustion & Calibration 14.1 Checking the Combustion 1. Combustion should be:- Natural Gas 9.0% CO2 ± 0.7 Propane 10.5% CO2 ± 1.0 at all 3 fan speeds:- ‘100’ (Maximum), the Ignition Phase speed and ‘00’(Minimum). 2. Press & together and hold for at least 6 seconds. ‘On’ will be displayed briefly, followed by ‘304’ then the boiler CH output expressed as percentage i.e. ‘100’. 3. Insert the analyser probe and once stabilised note the CO2 reading. 4. Press to select the Ignition Phase Speed. A value will be displayed, e.g. ‘33’. Note the CO2 reading. 5. Press again to select the Minimum Output. ‘00’ will be displayed. Note the CO2 reading. 6. If the CO2 is not within the tolerances referred to above at any of the speeds, follow the procedure in Section 14.3 opposite to calibrate the boiler. 7. To exit the function press & together for 6 seconds. 14.2 Calibration Function IMPORTANT: Do not commence the Calibration Function whilst the burner is lit ! The Case Front Panel MUST be fitted. Note: To obtain an accurate measurement on smaller capacity systems it may be necessary to open one or more hot taps in order to maintain the boiler at full rate. 1. The function is activated by pressing buttons and together for 6 seconds then quickly pressing button while ‘On’ is displayed. The Ignition Phase fan speed code will then be displayed. Calibration will take approximately 5 minutes. 2. If ‘304’ is displayed, then the Calibration Function has not been activated correctly. Isolate and reinstate all power sources to the boiler and repeat the above. 3. The boiler will automatically calibrate at ‘100’, the Ignition Phase speed then ‘00’. These represent the percentage of MAXIMUM fan speed (i.e. ‘00’ is MINIMUM fan speed). Once the boiler has stabilised and self-calibrated at each fan speed the and symbols will be displayed before the next speed is automatically set. 4. When self-calibration is complete the boiler will run at MINIMUM fan speed (‘00’displayed). The following symbols will also be displayed flashing together at regular intervals. 5. To exit the function press . ‘ESC’ will be displayed and the calibration function completed. R R IMPORTANT: DO NOT insert the Analyser Probe into the Test Point immediately. This will prevent saturation of the analyser. During the Calibration Function the combustion ratio may increase for a short time while the boiler performance is optimised. 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. 14.3 Adjusting the CO2 1. Press & together and hold for at least 6 seconds. ‘On’ will be displayed briefly, followed by ‘304’ then the boiler CH output expressed as percentage i.e. ‘100’. 2. Press to select the adjustment function. ‘0’ will alternate with ‘304’. Using the & buttons adjust ‘0’ between ‘-3’ & ‘3’. 3. Decreasing the value lowers the CO2, and selecting a higher value will increase CO2. 4. Once the correct CO2 reading is achieved press to return to the fan speed selection. 5. Using or to select the next fan speed. ‘00’ indicates MINIMUM speed, the other speed (Ignition Phase) will be indicated by, for example ‘33’ (this varies depending on boiler model). 6. Repeat step 2. above to adjust the CO2.at Ignition Phase and Minimum fan speeds. Press & together and hold for at least 6 seconds to exit the function. Flue Sampling Point
Сторінка 14 PDF
Сторінка 15
41 15.0 Electrical © Baxi Heating UK Ltd 2014 15.1 Illustrated Wiring Diagram X23 X37 X36 X22 X20 X24 X10 X11 X12 X13 X1 X2 Flue Sensor Heating Return Sensor Heating Flow Sensor Spark Ignition Electrode Gas Valve Fan Safety Thermostat Hydraulic Pressure Switch Pump X3 b b r r r bk g b g br w b g br bk b b br br b b br b b bk g/y b br bk gr g/y g/y g/y g/y g/y Flame Sensing Electrode b w bk bk br b M2 Low Voltage External Control Connection Terminal Strip Key To Wiring Colours b - Blue bk - Black br - Brown w - White gr - Grey r - Red g - Green g/y - Green/Yellow y - Yellow
Сторінка 15 PDF
Сторінка 16
42 16.0 Short Parts List © Baxi Heating UK Ltd 2014 Short Parts List Key Description Manufacturers No. No. Part No. A Fan 720768101 B Burner (12/15/18/24/28) 720767901 Burner (32) C Spark Ignition Electrode 720767301 D Flame Sensing Electrode 720767101 E Gas Valve 720752301 F Safety Thermostat 720765301 G Pump 720777401 H Heating Flow/ Return Sensor 720747101 J Pump Air Vent 720777601 K Hydraulic Pressure Sensor 720778001 L Heating Pressure Gauge 720776601 R Flue Sensor 720851401 N PCB only 720878102 O R.D.S. - 12 720845601 R.D.S. - 15 720845901 R.D.S. - 18 720846201 R.D.S. - 24 720846501 R.D.S. - 28 720846801 R.D.S. - 32 720847101 R.D.S. - 12 LPG 720847401 R.D.S. - 15 LPG 720847701 R.D.S. - 18 LPG 720848001 R.D.S. - 24 LPG 720848301 R.D.S. - 28 LPG 720848601 R.D.S. - 32 LPG 720848901 P Air/Gas Venturi 12 720820701 Air/Gas Venturi 15 720750301 Air/Gas Venturi 18 720750501 Air/Gas Venturi 24 720750701 Air/Gas Venturi 28 720785401 Air/Gas Venturi 32 720785601 Q Injector Washer - 12 (Ø 3.0) 720821101 Injector Washer - 15 (Ø 3.3) 720821301 Injector Washer - 18 (Ø 3.6) 720821501 Injector Washer - 24 (Ø 4.6) 720775801 Injector Washer - 28 (Ø 4.9) 720776001 Injector Washer - 32 (Ø 5.8) 720786601 A B C D F G J H L M E K N P O Q
Сторінка 16 PDF
Сторінка 17
43 17.0 Fault Finding © Baxi Heating UK Ltd 2014 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. The preferred minimum gas pressure is 20mb (NG) 37mb (LPG). 4. 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. 5. 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 a flashing number, either two or three digit, preceded by the symbol :- followed by 20, 28, 40, or 160 indicates possible faulty components. followed by 55 (after replacing R.D.S.) indicates calibration required (Section 14.2). 110 indicates overheat of the primary system water. 117 is displayed when the primary water pressure is greater than 2.7 bar. 118 is displayed when the primary water pressure is less than 0.5 bar. 133, 134 and 135 indicate that the gas supply has been interrupted, ignition has failed or the flame has not been detected. 128 is displayed if there has been a flame failure during normal operation. 125 is displayed in either of two situations:- i) If between 15 and 30 seconds of the burner lighting the boiler temperature has not changed by 1°C. ii) If within 10 minutes of the burner lighting the boiler actual temperature twice exceeds the selected temperature by 30°. In these instances poor primary circulation is indicated. 3. By pressing the 'Reset' button for 1 to 3 seconds when 110, 125, 133, 134, 135, 09, 15, 128 & 384 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. Gas Valve Connection Cable Gas Valve Fault Central Heating NTC Fault Flue NTC Fault Central Heating Return NTC Fault Calibration Required Pre-circulation Fault Safety Thermostat Operated Primary System Water Pressure Too High Primary System Water Pressure Too Low Circulation Fault (Primary) Flame Failure Flue NTC Operated Interruption Of Gas Supply or Flame Failure Elapsed Time - Gas Valve Open Without Gas Interruption Of Gas Supply (Internal Error) Flow/Return Sensor Temperature Test Fan or Fan Wiring Fault Circulation Fault (Dry Fire) False Flame 09 15 20 28 40 55 109 110 117 118 125 128 130 133 134 135 154 160 270 384 Table Of Error Codes ‘Service Due’ Message 1. After 11 months operation the ‘Service Due’ message will be shown on the boiler display. (If the installation has been subject to prolonged electrical isolation or power cuts this period may be longer than 11 months) 2. Once the service has been completed satisfactorily the ‘Service Due’ message can be reset or de-activated. To Reset 3. Press & for 6 seconds. Using scroll through until ‘22’ is displayed. Press . 4. Press to scroll to ‘15’. Confirm with then press to return the display to normal. To De-activate 5. Press & for 6 seconds. Using scroll through until ‘22’ is displayed. Press . 8. Press until ‘22’ is displayed again. Press . Using scroll through to ‘50’. Press . 9. Press until ‘25’ is displayed. Confirm with then press to return the display to normal. The button can be pressed so that the display shows the following information:- 1 press - ‘00’ alternates with Sub-Code (only when fault on boiler) or ‘000’ 2 presses - ‘01’ alternates with CH Temperature 3 presses - ‘02’ alternates with Outside Temperature (where Sensor fitted) 4 presses - ‘03’ alternates with DHW Temperature 5 presses - ‘04’ alternates with DHW Temperature 6 presses - ‘05’ alternates with System Water Pressure 7 presses - ‘06’ alternates with Return Temperature 8 presses - ‘04’ alternates with Flue Temperature 9 presses - ‘05’ alternates with Heat Exchanger Temperature R R
Сторінка 17 PDF
Сторінка 18
44 17.0 Fault Finding © Baxi Heating UK Ltd 2014 Refer to “Illustrated Wiring Diagram” for position of terminals and components Central Heating - Follow operational sequence Turn on mains power The display illuminates 20, 28, or 40 flashing 117 or 118 flashing 09, 15, 110, 125, 133, 134, 135 or 384 flashing Set Central Heating temperature to Maximum. symbol flashing, pump runs Go to section ‘A’ Go to section ‘D’ Ensure all controls and programmers are calling for heat Go to section ‘B’ If 110 is still flashing go to section ‘H’ YES YES NO NO NO YES YES YES NO YES YES YES NO NO NO Go to section ‘I’ Ensure controls are set to demand and verify the contacts are closed NO Press the reset button for 1 to 3 seconds NO Fan runs after up to 3 minutes 160 flashing Go to section ‘C’ NO If 09, 15, 110 or 384 is flashing or re-occurs regularly, check all PCB connections. If this has no effect replace the PCB. Fan runs at correct speed 160 flashing Go to section ‘C’ Spark at ignition electrodes up to 5 seconds & for 3 attempts Go to section ‘F’. Press the reset button for 1 to 3 seconds YES Burner lights Go to section ‘E’ Burner goes out after 5 seconds 133 flashing Go to section ‘G’ YES YES NO 109 flashing 125 flashing after 1 min Go to section ‘J’ YES YES 110 flashing NO Go to section ‘H’ YES NO Burner modulates to maintain set temperature Check Heating flow sensor. Go to section ‘D’ NO 130 flashing NO Go to section ‘K ’ YES Burner goes out NO Fan stops after 10 seconds YES Boiler operation correct YES 133 flashing
Сторінка 18 PDF
Сторінка 19
45 17.0 Fault Finding © Baxi Heating UK Ltd 2014 Fault Finding Solutions Sections Is there 230V at: Main terminals L and N Check electrical supply 1. NO Main terminal fuse Replace fuse Display illuminated 2. NO PCB - X10 connector Main terminals L and N Check wiring 3. NO NO A B C NO Fan connections correct at fan & PCB X11 and X23 connectors - see Wiring Diagram. Make connections Fan jammed or faulty wiring Connection OK at X41 Display or Main PCB fault 230V at PCB - X13 connector (between blue & brown - see Wiring Diagram) NO Replace PCB YES 230V at pump YES Replace pump NO Check wiring 230V at PCB - X11 connector (between blue & brown - see Wiring Diagram) YES NO Replace PCB Replace fan or wire YES YES Temperature sensor faulty. Check correct location and wiring. NO D Replace sensor Cold resistance approximately 10kΩ @ 25° C (Flow & Return sensors) (resistance reduces with increase in temp.) YES Gas at burner Ensure gas is on and purged Replace PCB Replace gas valve Check wiring and PCB - X36 connector see Wiring Diagram YES NO NO E
Сторінка 19 PDF
Сторінка 20
46 17.0 Fault Finding © Baxi Heating UK Ltd 2014 Replace PCB Check and correct if necessary 1. Ignition electrode and lead 2. Electrode connection 3. Spark gap and position Check wiring - see Diagram YES NO F 5 ±1 4 ±0.5 10 ±1 Spark Ignition Electrode Flame Sensing Electrode Electrode Position Viewing Window Burner Check and correct if necessary 1. The set of the gas valve (CO2 values - see instruction) 2. Flame sensing electrode and lead connections 3. Flame sensing electrode position 1. 2. Check supply pressure at the gas valve:- Natural Gas - Minimum 17 mbar Propane - Minimum 37 mbar G Replace flame sensing electrode or PCB Replace PCB YES Replace safety thermostat YES NO Safety thermostat operated or faulty Check for and correct any system faults H Allow to cool. Continuity across thermostat terminals more than 1.5 ohm NO Check Flow & Return Sensors - see section ‘D’ NO Is 110 still flashing ? YES I 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. Replace hydraulic pressure sensor YES Restore system pressure YES NO CH system pressure less than 0.5 bar or greater than 2.7 bar Check wiring and PCB - X22 connector for approx. 5V DC between green & black - see Wiring Diagram Replace PCB NO J Replace sensor NO System fault - correct NO YES Ensure that the boiler and system are fully vented Check flow temperature sensor connections and position. Cold resistance approximately 10kΩ @ 25° C (CH sensors) (resistance reduces with increase in temp.) YES Go to section ‘B’ K
Сторінка 20 PDF
Сторінка 21
18.0 32 kW Model Supplement © Baxi Heating UK Ltd 2014 Outercase Dimensions Casing Height - 763mm Overall Height Inc Flue Elbow - 923mm Casing Width - 450mm Casing Depth - 355mm Expansion Vessel - (For Central Heating only. Integral with appliance) bar Min Pre-charge Pressure 0.5 32 model litre Max Capacity of CH System 155 Primary Water Content of Boiler (unpressurised) 2.8 Injector 32 model mm 5.8 Heat Input CH (Net) Max Min 32 model kW 32 4.6 Heat Output CH (Non-Condensing) Max Min 32 model kW 32 4.6 Appliance Category CAT II 2H 3P Heat Output CH (Condensing) Max Min 32 model kW 33.8 5 Power Consumption 32model W 132 Inlet Pressure (Natural Gas - G20) mbar 20 Max Gas Rate (Natural Gas - G20) (After 10 mins) 32 model m3/h 3.40 Inlet Pressure (Propane - G31) mbar 37 NATURAL GAS ONLY ! PROPANE ONLY ! Max Gas Rate (Propane - G31) (After 10 mins) 32 model kg/h 2.49 Weights (32 model) Packaged Boiler Carton 42.5kg Installation Lift Weight 37.5kg 150mm* Min 763mm 450mm 175 mm Min (300mm Min if using 80/125mm flueing system) 5mm Min Fig. 8 5mm Min Appliance Type C13 C33 C43 C53 5mm Min 450mm Min For Servicing Purposes In Operation At least 1.5° 355mm (345mm with flap removed) * This is MINIMUM recommended dimension. Greater clearance will aid installation and maintenance 47
Сторінка 21 PDF
Сторінка 22
48 18.0 32 kW Model Supplement © Baxi Heating UK Ltd 2014 360° Orientation Flue Ø 100mm D C B A E G F At least 1.5° H J Boiler Side Boiler Side Heating Flow (22mm) Gas Inlet (22mm) Heating Return (22mm) Pressure Relief Valve (15mm) Condensate Drain 130mm 130mm 95 mm 45 mm 192 mm 50 mm Tap Rail Dimensions A 763mm B 355*mm *This can be reduced to 345mm by removing the boiler control access flap C 450mm D 116mm Ø Min. E 160mm (207mm for 80/125mm flue systems) F 150mm G 106mm H 170mm J 280mm 150mm For Side Flue Exit
Сторінка 22 PDF
Сторінка 23
49 18.0 32 kW Model Supplement © Baxi Heating UK Ltd 2014 1 NOTE: The main difference between Megaflo 32 kW and other models in the range is the position of the expansion vessel. The method of changing this component is described below. 13.21 Expansion Vessel (Fig. 66) 1. Close the flow and return isolation taps and drain the primary circuit. 2. Undo the nut on the pipe connection at the bottom of the vessel, and slacken the nut on the hydraulic inlet assembly. 3. Remove the screws securing the support bracket, and withdraw the bracket. 4. Whilst supporting the vessel undo and remove the locknut securing the vessel spigot to the boiler top panel. 5. Manoeuvre the vessel out of the boiler. 6. Reassemble in reverse order.
Сторінка 23 PDF
Сторінка 24
*All installations in England and Wales must be to Local Authority Building Control (LABC) either directly or through a Competent Persons Scheme. A Building Regulations Compliance will then be issued to the customer. www.centralheating.co.uk © Heating and Hotwater Industry Council (HHIC) 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 manufacturer’s instructions and complete this Benchmark Commissioning Checklist will invalidate the warranty. This does not affect the customer’s statutory rights. GAS BOILER SYSTEM COMMISSIONING CHECKLIST Customer name: Telephone number: Address: Boiler make and model: Boiler serial number: Commissioned by (PRINT NAME): Gas Safe register number: Company name: Telephone number: Company address: Commissioning date: CONTROLS (tick the appropriate boxes) Time and temperature control to heating Room thermostat and programmer/timer Programmable room thermostat Load/weather compensation Optimum start control Time and temperature control to hot water Cylinder thermostat and programmer/timer Combination Boiler Heating zone valves Fitted Not required Hot water zone valves Fitted Not required Thermostatic radiator valves Fitted Not required Automatic bypass to system Fitted Not required Boiler interlock Provided ALL SYSTEMS ’s instructions Yes What system cleaner was used? What inhibitor was used? Quantity litres Yes No CENTRAL HEATING MODE measure and record: Gas rate m³/hr OR ft³/hr Burner operating pressure (if applicable) mbar OR Gas inlet pressure mbar °C Central heating return temperature °C COMBINATION BOILERS ONLY Is the installation in a hard water area (above 200ppm)? Yes No Yes No DOMESTIC HOT WATER MODE Measure and Record: Gas rate m³/hr OR ft³/hr Burner operating pressure (at maximum rate) mbar OR Gas inlet pressure at maximum rate mbar Cold water inlet temperature °C Hot water has been checked at all outlets Yes Temperature °C I/min CONDENSING BOILERS ONLY The condensate drain has been installed in accordance with the manufacturer’s instructions and/or BS5546/BS6798 Yes ALL INSTALLATIONS Record the following: At max. rate: CO ppm AND CO/CO² Ratio At min. rate: (where possible) CO ppm AND CO/CO² Ratio The heating and hot water system complies with the appropriate Building Regulations Yes The boiler and associated products have been installed and commissioned in accordance with the manufacturer’s instructions Yes The operation of the boiler and system controls have been demonstrated to and understood by the customer Yes The manufacturer’s literature, including Benchmark Checklist and Service Record, has been explained and left with the customer Yes Commissioning Engineer’s Signature Customer’s Signature www.centralheating.co.uk 50
Сторінка 24 PDF
Сторінка 25
www.centralheating.co.uk It is recommended that your heating system is serviced regularly and that the appropriate Service Interval Record is completed. Service Provider Before completing the appropriate Service Record below, please ensure you have carried out the service as described in the manufacturer’s instructions. SERVICE RECORD SERVICE 01 Date: Engineer name: Company name: Telephone No: Gas safe register No: Record: At max. rate: CO ppm AND CO² % At min. rate: (Where Possible) CO ppm AND CO² % Comments: Signature SERVICE 02 Date: Engineer name: Company name: Telephone No: Gas safe register No: Record: At max. rate: CO ppm AND CO² % At min. rate: (Where Possible) CO ppm AND CO² % Comments: Signature SERVICE 03 Date: Engineer name: Company name: Telephone No: Gas safe register No: Record: At max. rate: CO ppm AND CO² % At min. rate: (Where Possible) CO ppm AND CO² % Comments: Signature SERVICE 04 Date: Engineer name: Company name: Telephone No: Gas safe register No: Record: At max. rate: CO ppm AND CO² % At min. rate: (Where Possible) CO ppm AND CO² % Comments: Signature SERVICE 05 Date: Engineer name: Company name: Telephone No: Gas safe register No: Record: At max. rate: CO ppm AND CO² % At min. rate: (Where Possible) CO ppm AND CO² % Comments: Signature SERVICE 06 Date: Engineer name: Company name: Telephone No: Gas safe register No: Record: At max. rate: CO ppm AND CO² % At min. rate: (Where Possible) CO ppm AND CO² % Comments: Signature SERVICE 07 Date: Engineer name: Company name: Telephone No: Gas safe register No: Record: At max. rate: CO ppm AND CO² % At min. rate: (Where Possible) CO ppm AND CO² % Comments: Signature SERVICE 08 Date: Engineer name: Company name: Telephone No: Gas safe register No: Record: At max. rate: CO ppm AND CO² % At min. rate: (Where Possible) CO ppm AND CO² % Comments: Signature SERVICE 09 Date: Engineer name: Company name: Telephone No: Gas safe register No: Record: At max. rate: CO ppm AND CO² % At min. rate: (Where Possible) CO ppm AND CO² % Comments: Signature SERVICE 10 Date: Engineer name: Company name: Telephone No: Gas safe register No: Record: At max. rate: CO ppm AND CO² % At min. rate: (Where Possible) CO ppm AND CO² % Comments: Signature *All installations in England and Wales must be to Local Authority Building Control (LABC) either directly or through a Competent Persons Scheme. A Building Regulations Compliance will then be issued to the customer. © Heating and Hotwater Industry Council (HHIC) 51
Сторінка 25 PDF
Сторінка 26
© Baxi Heating UK Ltd 2014 BAXI A Trading Division of Baxi Heating UK Ltd (3879156) Brooks House, Coventry Road, Warwick. CV34 4LL After Sales Service 0844 871 1525 Technical Enquiries 0844 871 1555 Website www.baxi.co.uk e&oe All descriptions and illustrations provided in this leaflet 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. Comp No. 7206338-09 (1 /14)
Сторінка 26 PDF