Baxi Combi 200 Installation And Service Manual Download

Page: 1 / 84

These instructions include the Benchmark Commissioning Checklist and should be left with the

user for safe keeping.They must be read in conjunction with the Flue Installation Guide.

United Kingdom

Installation and Service Manual

High Efficiency Wall Hung Condensing Gas Boiler

Baxi Combi

224 — 228 — 424 — 428

428 LPG

Summary of Contents for Combi 200

Page 1: ...ecklist and should be left with the user for safe keeping They must be read in conjunction with the Flue Installation Guide United Kingdom en Installation and Service Manual High Efficiency Wall Hung...

Page 2: ...sing the product and keep it in a safe place for later reference In order to ensure continued safe and efficient operation we recommend that the product is serviced regularly Our service and customer...

Page 3: ...sions and connections clearances 17 3 4 Electrical diagram 19 4 Description of the product 21 4 1 General description 21 4 2 Operating principle 21 4 2 1 Air gas adjustment 21 4 2 2 Combustion 21 4 2...

Page 4: ...4 Connecting setting outdoor weather sensor 44 6 5 Filling the installation 45 6 5 1 Flushing the system 45 6 5 2 Fill the installation 45 7 Commissioning 46 7 1 General 46 7 2 Checklist before commi...

Page 5: ...HW flow regulator and filter 63 10 4 8 Diverter valve motor 64 10 4 9 Diverter valve cartridge 64 10 4 10 Pressure relief valve 64 11 Troubleshooting 65 11 1 Error codes 65 11 2 Fault finding temporar...

Page 6: ...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 opposi...

Page 7: ...elevant 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...

Page 8: ...ace possible leaks and seal them immediately Warning Do not touch the flue gas pipes Depending on the boiler settings the temperature of the flue gas pipes may exceed 60oC Warning Do not touch the rad...

Page 9: ...any way 1 4 Specific safety instructions 1 4 1 Handling General The following advice should be adhered to from when first handling the boiler to the final stages of installation and also during mainte...

Page 10: ...ng cases Failure to abide by the instructions on installing the appliance Failure to abide by the instructions on using the appliance Faulty or insufficient maintenance of the appliance 1 5 2 Installe...

Page 11: ...y to prevent problems and to guarantee correct operation of the appliance Danger Risk of dangerous situations that may result in serious personal injury Danger of electric shock Risk of electric shock...

Page 12: ...ply pressure mbar I2H G20 20 3 1 4 Standards Codes of Practice refer to the most recent version Tab 3 In GB the following Codes of Practice apply Standard Scope BS 6891 Gas Installation BS 5546 Instal...

Page 13: ...nces Important LPG information can be found in Technical information LPG page 75 Tab 5 General Baxi Combi 224 228 424 428 Gas Council Numbers 47 077 21 47 077 22 47 077 23 47 077 24 Nominal heat input...

Page 14: ...pecific flow rate D l min 11 5 13 4 11 5 13 4 Domestic hot water temperature range adjustment 5 C C 35 60 35 60 35 60 35 60 Production of domestic water with T 30 C l min 11 4 13 3 11 4 13 3 Productio...

Page 15: ...bi 224 228 424 428 Gas inlet mm 22 22 22 22 Heating flow mm 22 22 22 22 Heating return mm 22 22 22 22 Cold water inlet mm 15 15 15 15 Hot water outlet mm 15 15 15 15 Pressure relief discharge mm 15 15...

Page 16: ...oad elmin kW 0 011 0 011 0 011 0 011 Standby mode PSB kW 0 003 0 003 0 003 0 003 Other items Standby heat loss Pstby kW 0 069 0 069 0 069 0 069 Ignition burner power consumption Pign kW 0 000 0 000 0...

Page 17: ...Mains cold water inlet 8 Heating circuit water return A Clearances below 200mm minimum 250mm recommended B Clearances in front 450mm minimum 1000mm recommended The clearances shown in the diagram are...

Page 18: ...tical Flue Centre Line 22 Heating Return 22mm Heating Flow 22mm Hot Water Outlet 15mm Combi Only Not System Cold Water Inlet 15mm Combi Only Not System Side Clearance 5 Side Clearance 5 Clearance belo...

Page 19: ...l R L BUS Bk R W Gn Gn Wk Bk Br R 16 F1 F1 1 6A L N L CH L DW N GV W8 1 W8 2 W8 4 W8 3 ST HS WPS DS RS FS X6 A X9 1 X14 A X4 A W8 X5 A X1 A X3 A X2 A A JP1 G Y G Y SERVICE X7 X6 F2 0 5A X14 OS X13 J X...

Page 20: ...A Boiler PCB and control panel connection electrical connection board X13 A Not used X14 A Connection L BUS Tab 17 Electrical connections to be made to the boiler B X1 B Electrical power supply 230 V...

Page 21: ...er The mixture is ignited by the spark electrode 4 2 2 Combustion The burner heats the heating water circulating in the heat exchanger When the temperature of the combustion gas is lower than the dew...

Page 22: ...r 22 Silencer 23 Trap quick connection with gaskets 24 Heating circuit water flow sensor 25 Overheat safety thermostat 26 Heating circuit water return sensor behind the silencer 27 Heat exchanger 28 F...

Page 23: ...i single channel wired programmable room thermostat 7212444 Baxi single channel wired timer 720971601 Baxi room thermostat 720330001 Baxi wired weather sensor 720648301 Multifit condensate PRV combine...

Page 24: ...eter 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...

Page 25: ...ler is fitted with an automatic integral bypass 5 2 5 System control Further external controls e g room thermostat sensors MUST be fitted to optimise the economical operation of the boiler in accordan...

Page 26: ...el is suitable for correct operation for system capacities up to 120 litres For greater system capacities an additional expansion vessel must be fitted For GB refer to BS 7074 Pt 1 For IE the current...

Page 27: ...which will dispose of both condensate high temperature water from the relief valve It has a maximum head of 5 metres 5 3 Choice of the location 5 3 1 Location of the boiler The boiler may be fitted to...

Page 28: ...as exhaust type II2HM3B P IT example Gas category used depends on the country of destination C1 C2 Factory parameters s n Serial number The service label is at the base of the cover of the terminal bl...

Page 29: ...dimensions for a bathtub For other examples refer to the Current IEE Wiring Regulations Reference must be made to the relevant requirements In GB this is the current IEE Wiring Regulations and Buildin...

Page 30: ...Key Description A Termination to an internal soil and vent pipe B External termination via internal discharge branch e g sink waste downstream It is NOT RECOMMENDED to connect upstream of the sink or...

Page 31: ...minimum of 21 5mm diameter and must be supported using suitably spaced clips of the correct design to prevent sagging It is advisable that the full length of condensate pipe is run internally and pre...

Page 32: ...the boiler A Clearance below 200mm minimum 250mm recommended B Clearance in front 450mm minimum 1000mm recommended 5 3 7 Flue chimney location The following guidelines indicate the general requiremen...

Page 33: ...1 In addition the terminal should be no nearer than 150mm 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 cleara...

Page 34: ...ed for cutting Extensions of 250mm 500mm and 1m are available All fittings should be fully engaged The approximate engagement is 40mm Apply the lubricant supplied to the seal on each fitting to aid as...

Page 35: ...01 can be used Important This guard is not compatible with Flue Deflector referred to below There must be a clearance of at least 50mm between any part of the terminal and the guard When ordering a te...

Page 36: ...ty before connection See Handling page 9 before unpacking or lifting the boiler Follow the procedure on the carton or see the diagrams below to unpack the boiler Lift the boiler to a vertical position...

Page 37: ...water pipes Remove the template 5 Cut the hole for the flue minimum diameter 116mm 6 Drill the wall as previously marked to accept suitable wall plugs Secure the wall bracket using appropriate fixing...

Page 38: ...ent water loss replacement refilling A Filling loop B Flow and return taps A filling loop is supplied with the 424 and 428 models The filling method adopted must be in accordance with all relevant wat...

Page 39: ...pply incorporates a non return backflow prevention device or any other device that includes one it is possible for a build up of pressure to occur This may result in damage to the boiler and other app...

Page 40: ...e elbow must be connected to the DHW flow pipe Using the sealing washers provided connect the taps and elbow to the boiler Ensure all joints are tight 6 2 Assembly 6 2 1 Fitting the pressure relief di...

Page 41: ...the distance from the flue elbow to the outside face of the wall is less than 250mm the connection assembly can be discarded and the terminal assembly fitted directly into the elbow 4 In instances whe...

Page 42: ...s supplied with the telescopic flue Important It is essential that the flue terminal is fitted as shown to ensure correct boiler operation and prevent water entering the flue 11 Make good between the...

Page 43: ...OFF Maximum output heating ON Boiler output 50 heating 3 J3 DO NOT ADJUST See Electrical diagram page 19 for more information 6 4 3 Connecting a room thermostat The terminals can be accessed by remov...

Page 44: ...ense App The boiler display will not show the slope but will still be active 5 Normally the display will show the current temperature of the water in the boiler As the knob is turned the display will...

Page 45: ...awn to for GB Guidance G24 2 and recommendation R24 2 of the Water Regulations Guide for IE The current edition of IS 813 Domestic Gas Installations 3 The sealed primary circuits may be filled or repl...

Page 46: ...rary filling loop except where a permanent loop is fitted Test for gas tightness turn the gas supply on and purge according to GB BS 6891 and in IE I S 813 Domestic Gas Installations 7 2 Checklist bef...

Page 47: ...xample after a system drain down must be done manually To start the process manually press the RESET button for approximately 5 seconds and release The display will show dAf briefly and then t 17 to i...

Page 48: ...e If the appliance cannot be operated on central heating for more than 10 minutes without reaching maximum temperature refer to Combustion check on small heating systems page 74 The case front panel m...

Page 49: ...he display shows a P with 1 bar alongside it alternating with the current water temperature D 5 Check the CO and CO2 levels at the Minimum rate and record the result in the Benchmark log at the back o...

Page 50: ...ue 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 pro...

Page 51: ...er Guide 4 Hand over the User Guide and Installation and Servicing Instructions giving advice on the necessity of regular servicing 5 For IE it is necessary to complete a Declaration of Conformity to...

Page 52: ...mains power supply at the fused spur unit Isolate the gas supply at the boiler valve Protect the boiler from frost Important The boiler is not protected against frost once it has been shut down 8 4 F...

Page 53: ...on Status Sub status C Heating water temperature C The symbol flashes C Domestic hot water temperature C The symbol flashes If no domestic hot water sensor connected display C Outside temperature C Th...

Page 54: ...rformance below Competence to carry out checking combustion performance BS 6798 Specification for Installation Maintenance of Gas Fired Boilers not exceeding 70kWh advises that The person carrying out...

Page 55: ...aning kit available as an accessory 5 Check the pressure of the heating system 6 Check the pressure of the expansion vessel 7 Check that the fan is working correctly 8 Check that the intake and exhaus...

Page 56: ...Check that there are no cracks and or other damage on the surface of the burner If the burner is damaged replace it 13 Reassemble in reverse order 10 3 Specific maintenance instructions Warning When c...

Page 57: ...ck wires 1 Remove the air gas unit See Air gas unit page 58 to remove 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 ea...

Page 58: ...ews holding the combustion chamber burner door assembly to the air gas unit and disengage the tab on the cover from the air gas unit 8 Fit new combustion chamber burner door assembly to the air gas un...

Page 59: ...m rate adjustment screw B to alter the CO2 Turn anti clockwise B1 to increase the CO2 or clockwise B2 to reduce the CO2 Important Do not turn the adjustment screw more than 1 8 of a turn at a time All...

Page 60: ...te trap by lifting clear and pulling forward 7 Disconnect the flow and return overheat thermistor 8 Disengage the wires from the securing clip and move to one side 9 Hinge down the air gas cover and d...

Page 61: ...be cleared or replaced and the vessel re charged to 1 bar 5 If the hose is clear support the vessel undo the locknut and manoeuvre the vessel out of the boiler 6 Reassemble in reverse order and rechar...

Page 62: ...cuit and draw off any residual DHW 3 Hinge the control box downwards 4 Remove the air gas unit See Air gas unit page 58 paragraph 1 to 6 to remove 5 Undo the screws securing the plate heat exchanger t...

Page 63: ...sor ensuring it is correctly oriented and fully engaged over the manifold 10 4 7 DHW flow regulator and filter Important It is recommended to isolate the cold water mains stop cock to the dwelling 1 C...

Page 64: ...auge clip and ease the pressure gauge away from its housing Important It is recommended to completely remove the pressure gauge to ease the access to the diverter cartridge Push the plastic retaining...

Page 65: ...ss The boiler will run in de aeration for approximately 5 minutes before restarting See Fault finding permanent faults page 66 for a list of permanent faults and their possible solutions 11 2 Fault fi...

Page 66: ...nnection Sensor fault Check wiring Check sensors are operating correctly Check that the sensor has been correctly fitted Replace the sensor if necessary H 03 01 Communication error with the HMI PCB HM...

Page 67: ...he water pressure Check the wiring Check the circulation direction pump valves Check the cleanliness of the heat exchanger Check that the sensors are oper ating correctly Check that the sensor has bee...

Page 68: ...e sensor short circuited Sensor not or badly connected Bad connection Sensor fault Check the wiring Check the sensors are operating correctly Check the sensor has been cor rectly fitted Replace the se...

Page 69: ...that the gas valve is fully opened Check the supply pressure Replace the ionization ignition electrode Check the earthing Check the wiring on the ioniza tion ignition electrode E 04 12 False flame sig...

Page 70: ...erating temperature in the domestic water system The symbol followed by the temperature in C will flash 5 Press this button for one second again to view the power level from 0 to 100 The symbol and th...

Page 71: ...k U19 Fan operation with active request U20 Operation at set temperature setpoint U30 Operation at limited temperature setpoint U31 Operation at maximum output available U32 Level 1 gradient detected...

Page 72: ...ocedure Disconnect the gas electric supplies and isolate them Drain the primary circuit and disconnect the filling device Dismantle the chimney system and remove the boiler from the wall mounting fram...

Page 73: ...unit 24kW Natural Gas only Air Gas unit 28kW Natural Gas only 7661938 7661952 347 HMI control 7662052 408 Burner assembly 7662070 29 Insulation rear 7661741 30 Insulation front 7661745 72 Pump assembl...

Page 74: ...Baxi Customer Support 0344 871 1545 If incorrect when changing gas valve adjust re check as described in Section 10 Measure record combustion If incorrect at commissioning call Baxi Customer Support...

Page 75: ...30 C Central Heating Maximum Rate Pnc kW 26 1 Nominal heat output 50 30 C Central Heating Minimum Rate Pnc kW 5 2 Tab 34 Characteristics of combustion Baxi Combi 428 LPG LPG gas rate G31 Qmax kg h 2...

Page 76: ...LPG Tab 36 LPG gas category type and supply pressure Gas category Gas Type Supply pressure mbar CAT II 2H 3P G31 37 14 2 4 Setting the gas valve LPG 1 Disconnect the electrode lead and earthing cable...

Page 77: ...ot turn the adjustment screw more than 1 8 of a turn at a time Allow the analyser reading to settle before any further adjustment Set the boiler to Minimum rate and check the CO2 The CO2 at MINIMUM ra...

Page 78: ...t r e m m a r g o r p le room thermostat Load weather m u m i t p O n o i t a s n e p m o c start control Time and temperature control to hot water Cylinder thermostat and n o i t a n i b m o C r e m...

Page 79: ...o Record At max rate CO ppm AND CO At min rate Where Possible CO ppm AND CO Comments Signature SERVICE 02 Date Engineer name Company name Telephone No Gas safe register No Record At max rate CO ppm AN...

Page 80: ...rate Where Possible CO ppm AND CO Comments Signature SERVICE 08 Date Engineer name Company name Telephone No Gas safe register No Record At max rate CO ppm AND CO At min rate Where Possible CO ppm AND...

Page 81: ...14 Appendix 7696317 1 21032018 81...

Page 82: ...14 Appendix 82 7696317 1 21032018...

Page 83: ...hnological information contained in these technical instructions as well as any drawings and technical descriptions supplied remain our property and shall not be multiplied without our prior consent i...

Page 84: ...ions 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...

Search results

Summary of Contents for Combi 200

Reviews:

Related manuals for Combi 200

Brands by name

Popular brands

Baxi Combi 200, Installation And Service Manual

Search results

Summary of Contents for Combi 200

Reviews:

Related manuals for Combi 200

Brands by name

Popular brands