Main Eco Compact Combi 25 Installation And Service Manual Download

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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

Main Eco Compact Combi

25 — 30

Summary of Contents for Eco Compact Combi 25

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

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: ...s 15 3 3 Dimensions and connections clearances 16 3 4 Electrical diagram 17 4 Description of the product 19 4 1 General description 19 4 2 Operating principle 19 4 2 1 Air gas adjustment 19 4 2 2 Comb...

Page 4: ...6 4 2 Connecting outdoor sensor 44 6 4 3 Identifying label 45 6 4 4 Outdoor sensor graph 45 6 4 5 Setting outdoor sensor curve 45 6 5 Filling the installation 46 6 5 1 Flushing the system 46 6 5 2 Fil...

Page 5: ...l 60 9 3 12 Gas valve 60 9 3 13 Pump head only 63 9 3 14 Pump complete 63 10 Troubleshooting 64 10 1 Error codes 64 10 1 1 Initial error fault finding checks 64 10 1 2 Display of error codes 64 10 2 F...

Page 6: ...taller 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 flowc...

Page 7: ...form 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 o...

Page 8: ...ows 3 Trace possible leaks and seal them immediately Warning Do not touch the flue gas pipes Depending on the boiler settings the temperature of the flue gas pipes may exceed 60oC Warning Do not touch...

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

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

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

Page 12: ...91 Gas Installation BS 5546 Installation of hot water supplies for domestic purposes BS EN 12828 Heating systems in buildings 3 Technical specifications 12 Safety Performance Quality This boiler has b...

Page 13: ...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...

Page 14: ...l pre charge pressure bar 1 0 1 0 Maximum capacity of central heating system litres 100 100 Primary water content of boiler unpressurised litres 2 5 2 5 Tab 7 Domestic hot water circuit specifications...

Page 15: ...height width depth mm H 700 W 390 D 285 Tab 11 Connections 25 30 Gas inlet mm 22 22 Heating flow mm 22 22 Heating return mm 22 22 Cold water inlet mm 15 15 Hot water outlet mm 15 15 Pressure relief d...

Page 16: ...ull load elmax kW 0 028 0 038 Part load elmin kW 0 015 0 015 Standby mode PSB kW 0 003 0 003 Other items Standby heat loss Pstby kW 0 040 0 040 Ignition burner power consumption Pign kW 0 0 Annual ene...

Page 17: ...flow 4 Hot water outlet 5 Gas inlet 6 Pressure relief pipe 7 Cold water inlet 8 Heating circuit water return 9 Pump drain point 10 Boiler drain point on flow isolation tap 11 Cable entry points The c...

Page 18: ...M1 M2 b bk bk black br brown b blue g green r red w while g y green yellow Key Description Key Description A Gas valve I Spark ignition electrode B Hall effect sensor J Diverter valve motor C Flue se...

Page 19: ...t All systems must be thoroughly cleansed flushed and treated with inhibitor Note These installation and servicing instructions must be read in con junction with the Flue Accessories and Fitting Guide...

Page 20: ...n the demand is satisfied the burner is extinguished and the pump continues to run for a period of 3 minutes Pump Overrun Key to components 1 Pump with automatic air vent 2 Boiler drain tap 3 Pressure...

Page 21: ...eated enclosure and during periods when the heating system is to be unused it is recommended that the per manent live is left on to give boiler frost protection When the boiler temperature falls below...

Page 22: ...t exchanger 11 Control box 19 Safety thermostat 4 DHW plate heat exchanger not on System Models 12 Condensate trap 20 Water Pressure Switch 5 Pump with automatic air vent 13 Safety pressure relief val...

Page 23: ...re Units for pressure 4 5 Standard delivery 4 5 1 Contents of the carton The boiler is delivered in a carton comprising Wall hung gas boiler Wall bracket for fastening the boiler to the wall Fitting k...

Page 24: ...condensate drain pipe trace heating element 5121379 Multifit remote secondary PRV kit 7665482 Multifit Easy Fill permanent filling link 7715591 Multifit compact pre plumbing jig 720971401 Multifit wa...

Page 25: ...from the meter to the appliance is of adequate size and the demands of any other gas appliances in the property are tak en into consideration Do not use pipes of a smaller diameter than the boil er g...

Page 26: ...he primary side of the DHW plate heat exchanger as an automatic integral bypass 5 2 5 System control Further external controls e g room thermostat sensors MUST be fitted to optimise the economical ope...

Page 27: ...relieve the pres sure by draining the boiler Using a suitable gauge check the pressure at the valve on the underside of the vessel Adjust the pressure as required and repressurise the system 5 2 9 Saf...

Page 28: ...de a cupboard Where the boiler is sited in an unheated enclosure and during periods when the heating system is to be unused it is recommended that the per manent live is left on to give BOILER frost p...

Page 29: ...rence must be made to the relevant requirements In GB this is the current IEE Wiring Regulations and Building Regulations In IE reference should be made to the current edition of IS 813 Domestic Gas I...

Page 30: ...ermination 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 t...

Page 31: ...lips of the correct design to prevent sagging It is advisable that the full length of condensate pipe is run internally and preferably be less than 3 metres Internal runs greater than 3 metres or runs...

Page 32: ...ions are given in BS 5440 Pt 1 For IE recommendations are given in the current edition of I S 813 Do mestic Gas Installations Important Due to the nature of the boiler a plume of water vapour will be...

Page 33: ...h as a window frame 2 Only ONE 25mm clearance is allowed per installation If one of the dimension D E F G or H is 25mm then the remainder MUST be as shown in brackets in accordance with BS 5440 1 Impo...

Page 34: ...ut the need 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...

Page 35: ...ctor referred to below There must be a clearance of at least 50mm between any part of the ter minal and the guard When ordering a terminal guard quote the appliance name and model number The flue term...

Page 36: ...vertically 2 Mark the position of the two most suitable fixing slots for the wall plate 3 Mark the position of the centre of the flue hole rear exit For side flue exit mark as shown 4 If required mar...

Page 37: ...between the circuit and a supply pipe provided a Listed double check valve or some other no less effective backflow pre vention device is permanently connected at the inlet to the circuit and the temp...

Page 38: ...he boiler s maximum working mains pressure is 8 bar therefore all pipe work connections fittings etc should be suitable for pressures in excess of 8 bar A pressure reducing valve must be fitted for pr...

Page 39: ...ing flow and return pipework gas supply and mains cold inlet 6 Connect the elbow to the DHW flow outlet 7 Using the sealing washers provided connect the taps and elbow to the boiler 8 Ensure all joint...

Page 40: ...315mm to 500mm 2 Connection assembly 3 Terminal assembly There are two telescopic sections the terminal assembly and the connec tion assembly a roll of sealing tape and two self tapping screws A 93 el...

Page 41: ...ase of assembly do not use any other type Ensure flue is fully engaged into elbow B Apply the lubricant supplied for ease of assembly do not use any other type Ensure elbow is fully engaged into boile...

Page 42: ...ols OpenTherm Important When fitting external controls remove the yellow link wire from the Mains Terminal Block M1 Note Consideration must be given to Health and Safety Document 635 The Electricity a...

Page 43: ...ernal controls frost thermostat room thermostat timer must always be taken from terminal 2 at the boiler Live Neutral and Earth to power these controls must be taken from the Fused Spur 10 Reclip the...

Page 44: ...sensor is a low voltage device This wiring is NOT supplied in the kit 4 If it is not possible to pass the wiring through the wall directly behind remove the circular knock out panel in the sensor base...

Page 45: ...he central heating control knob should be turned clockwise to the position which corresponds with the desired curve as shown on the graph 3 Curve 50 is recommended as the most suitable for the normal...

Page 46: ...on of I S 813 Domestic Gas Installa tions 2 The sealed primary circuits may be filled or replenished by means of a temporary connection between the circuit and a supply pipe provi ded a Listed double...

Page 47: ...hen close and disconnect the temporary 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 G...

Page 48: ...ion has completed the display will show the primary flow temperature and both the CH and DHW symbols Important If during the first commissioning process the power to the boiler is interrupted the de a...

Page 49: ...2 Checking combustion chimney sweep mode The case front panel must be fitted when checking combustion Ensure the system is cold and the gas and electric supplies are turned on Important The person ca...

Page 50: ...y indicating maximum output 5 After checking at maximum turn the CH knob fully anticlock wise 0 will appear in the display indicating minimum output Measuring the combustion Turn on the domestic hot w...

Page 51: ...nternal 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 unt...

Page 52: ...over the User s Operating Installation and Servicing Instruc tions giving advice on the necessity of regular servicing 4 For IE it is necessary to complete a Declaration of Conformity to indicate com...

Page 53: ...ure performs a series of tests after which the installa tion is purged this takes approximately five minutes 8 3 Frost protection Where possible draining the system should be avoided If the system is...

Page 54: ...ed The integrity of the complete flue system and the flue seals by checking air inlet sample to eliminate the possibility of recirculation O2 20 6 CO2 0 2 The integrity of the boiler combustion circui...

Page 55: ...ate 1 Ensure that both the gas and electrical supplies to the boiler are iso lated and that the boiler is cool 2 Remove the case front panel and hinge down the control panel See Specific maintenance i...

Page 56: ...he gas electrical supplies 2 Remove the front panel 3 Remove the silencer 4 Disconnect the spark electrode lead and earth wire from the detec tion spark electrode 5 Remove the clip securing the gas fe...

Page 57: ...disengage the panel Hinge down the control panel 9 3 1 Detection spark ignition electrode 1 Disconnect the electrode lead and earthing cable 2 Using a T15 Torx key remove the retaining screws securin...

Page 58: ...3 5 DHW temperature sensor NTC 1 Turn off the mains cold water supply tap and draw off the residual domestic hot water 2 Ease the retaining tab on the sensor away and disconnect the elec trical plug 3...

Page 59: ...ng seal 3 Sealing grommet 4 Discharge pipe 5 Grub screw 1 Drain the primary circuit 2 Disconnect the discharge pipe from the valve and remove the seal ing grommet 3 Using a suitable hexagon key undo t...

Page 60: ...disconnect the braided hose from the vessel and hydraulic inlet assembly taking care as water may still be in the vessel 5 Ensure that the braided hose is free of restriction as a boiler with a blocke...

Page 61: ...r neath the boiler 3 Undo the nut on the gas valve outlet Ease the pipe aside Important The gas nozzle injector is inserted in the gas valve outlet 4 Remove the screws securing the gas valve to the bo...

Page 62: ...6 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 suit...

Page 63: ...ain the boiler primary circuit 3 Disconnect the electrical plugs from the pump motor 4 Prise off the securing clip that is holding the pump return pipe in po sition Pull away the pipe 5 Pull out the s...

Page 64: ...of two situations If between 15 and 30 seconds of the burner lighting the primary water temperature has not changed by 1 C If within 10 minutes of the burner lighting the primary water tem perature ac...

Page 65: ...r 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...

Page 66: ...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 aft...

Page 67: ...inutes check 230V at PCB X13 connector between blue brown see Wiring Diagram NO Replace PCB YES 230V between PCB X13 connector blue and PCB X11 connector black see Wiring Diagram NO Replace PCB YES 23...

Page 68: ...e CO2 values see instruction 2 Flame sensing electrode and lead connections 3 Flame sensing electrode position 1 2 G Replace flame sensing electrode or PCB Replace PCB YES Replace safety thermostat YE...

Page 69: ...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 10k 25 C CH sensors resistance r...

Page 70: ...ioning procedure 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 moun...

Page 71: ...12 Disposal 12 1 Disposal and recycling Caution Removal and disposal of the boiler must be carried out by a quali fied person in accordance with local and national regulations 12 Disposal 71...

Page 72: ...rn sensor 7207471 D NTC flue sensor 7207892 E Diverter valve motor 7216534 F Auto air vent 7207776 G Burner door assembly 7686323 H Insulation rear 7661741 J Insulation front 7661745 K Pump assembly 7...

Page 73: ...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 i t r e m m a r g o r p Boiler Heating zone valves t o N d e t t i F required Hot...

Page 74: ...register No 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...

Page 75: ...any name Telephone No Gas safe register No Record At max rate CO ppm AND CO At min rate Where Possible CO ppm AND CO Comments Signature SERVICE 09 Date Engineer name Company name Telephone No Gas safe...

Page 76: ...76...

Page 77: ...14 Appendix 77...

Page 78: ...14 Appendix 78...

Page 79: ...nological information contained in these technical instructions as well as any drawings and technical de scriptions supplied remain our property and shall not be multiplied without our prior consent i...

Page 80: ...d 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 in...

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