Main Combi 24 HE Manuel de service

© Baxi Heating UK Ltd 2013Duo-tec Combi HE A RangeGas Fired Wall Mounted CondensingCombination BoilerInstallation & Servicing Instructions These i

104.0 Technical Data© Baxi Heating UK Ltd 20130200 400 600 800 1000 12000.511.522.533.54Metre (wg)Flow Rate (l/h)Pump - Available Head055.54.54.1 D

115.0 Dimensions and Fixings© Baxi Heating UK Ltd 2013DimensionsA 780mmB 345mmC 450mmD 116mm Ø Min.E 185mm(207mm for 80/125mm flue systems)F 145mmG 13

126.0 System Details© Baxi Heating UK Ltd 20136.1 Information1. The Baxi Duo-tec Combi HE A Condensing CombinationBoiler is a ‘Water Byelaws Scheme -

136.0 System Details© Baxi Heating UK Ltd 20136.5 System Filling and Pressurising1. A filling point connection on the central heating returnpipework m

146.0 System Details© Baxi Heating UK Ltd 2013BoilerOther TapOutletsExpansionVessel*To HotTapsCheckValve*Pressure ReducerValve*Stop TapFig. 76.8 Domes

157.0 Site Requirements© Baxi Heating UK Ltd 20137.1 Location1. The boiler may be fitted to any suitable wall with the fluepassing through an outside

167.0 Site Requirement© Baxi Heating UK Ltd 20137.3 Ventilation of Compartments1. Where the appliance is installed in a cupboard orcompartment, no air

17© Baxi Heating UK Ltd 20137.0 Site Requirements7.7 Condensate DrainFAILURE TO INSTALL THE CONDENSATEDISCHARGE PIPEWORK CORRECTLY WILL AFFECTTHE RELI

18© Baxi Heating UK Ltd 20137.0 Site Requirements7.7 Condensate Drain (cont.)11. When discharging condensate into a soil stack or wastepipe the effect

19© Baxi Heating UK Ltd 20137.0 Site Requirements7.7 Condensate Drain (cont.)12. A boiler discharge pump is available, ‘MULTIFIT’ part no. 720648301.

2© Baxi Heating UK Ltd 2013Natural GasBaxi Duo-tec Combi 24 HE AG.C.No47 075 35Baxi Duo-tec Combi 28 HE AG.C.No47 075 36Baxi Duo-tec Combi 33 HE AG.C.

207.0 Site Requirements© Baxi Heating UK Ltd 20137.8 FlueNOTE: Due to the nature of the boiler a plume of watervapour will be discharged from the flue

218.0 Flue Options© Baxi Heating UK Ltd 20138.1 Horizontal Flue Systems1. The standard flue is suitable only for horizontaltermination applications.2.

228.0 Flue Options© Baxi Heating UK Ltd 2013VerticalFluesVertical Flues(Twin Pipe)XXYY8.2 Twin & Vertical Flue Systems1. Maximum permissible equiv

238.0 Flue Options© Baxi Heating UK Ltd 2013ABK,K1RDCNU,WSLHJMEGFP8.3 Flue AccessoriesA2Key Accessory Size Code NoFLUE GROUP AConcentric Flue System 1

248.0 Flue Options© Baxi Heating UK Ltd 20138.4 Twin Flue Duct Adaptor1. The kit allows connection of a twin flue system to theboiler adaptor.8.5 Twin

258.0 Flue Options© Baxi Heating UK Ltd 20138.6 For Roof Terminals1. In the case of a pitched roof 25 - 50 degrees, position the leadtile to replace/f

269.0 Plume Displacement© Baxi Heating UK Ltd 20139.1 Plume Displacement Kit (Fig. 14b)Kit No 5118638Content of kit1 0.9m 60/100 Concentric Flue1 1m 6

279.0 Plume Displacement© Baxi Heating UK Ltd 2013Concentric 60/100 Flue60Ø ExhaustXYFig. 1720246810121460 Ø Exhaust (metres) XConcentric 60/100 Flue

289.0 Plume Displacement© Baxi Heating UK Ltd 2013Min. 2 metresFig. 1950mmFlue TrimPosition of ‘Jubilee’ ClipscrewFig. 2430mm30mmFig. 21Fig. 23Fig. 20

299.0 Plume Displacement© Baxi Heating UK Ltd 20139.3 General Fitting Notes (cont.)15. For aesthetic purposes it is permissible to route the60Ø exhaus

3Installer Notification Guidelines© Baxi Heating UK Ltd 2013Choose BuildingRegulations NotificationRouteContact your relevant LocalAuthority Building

3010.0 Installation© Baxi Heating UK Ltd 200710.1 Unpacking & Initial PreparationThe gas supply, gas type and pressure must be checked forsuitabil

3110.0 Installation© Baxi Heating UK Ltd 201310.3 Fitting The Boiler1. Remove the sealing caps from the boiler connections.NOTE: A small amount of wat

3210.0 Installation© Baxi Heating UK Ltd 201310.6 Fitting The FlueHORIZONTAL TELESCOPIC FLUE1. There are two telescopic sections, the TerminalAssembly

3310.0 Installation© Baxi Heating UK Ltd 2013 10.6 Fitting the Flue (Cont)8. Adjust the two telescopic sections to dimension ‘Y’ (Fig. 41). Ensure t

3410.0 Installation© Baxi Heating UK Ltd 201310.7 Making The Electrical ConnectionsThe boiler is fitted with a 1.3m length of 3 core cable. Thiscan be

3511.0 Commissioning© Baxi Heating UK Ltd 201311.1 Commissioning the Boiler1. Reference should be made to BS:EN 12828 & 14336 whencommissioning th

3611.0 Commissioning© Baxi Heating UK Ltd 2013 11.2 Check the Operational (Working) Gas Inlet Pressure1. Ensure that all controls are calling for he

3712.0 Completion© Baxi Heating UK Ltd 201312.1 Completion 1. Instruct the user in the operation of the boiler andsystem, explaining the operational s

3813.0 Servicing© Baxi Heating UK Ltd 2013Case Front PanelFig. 62Facia Panel SecuringScrewsFig. 63Inner DoorPanelFig. 64CondensateTrapSump13 .1 Annual

3913.0 Servicing© Baxi Heating UK Ltd 201313.2 Annual Servicing - Inspection (Cont)6. Undo the nut on the gas inlet pipe to the venturi (Fig. 65)and p

4Legislation© Baxi Heating UK Ltd 2013Codes of Practice - refer to the most recent versionIMPORTANT - Installation, Commissioning, Service & Repai

4014.0 Changing Components© Baxi Heating UK Ltd 2013IMPORTANT: When changing components ensure thatboth the gas and electrical supplies to the boiler

4114.0 Changing Components© Baxi Heating UK Ltd 201314.3 Fan (Fig. 71)1. Undo the nut on the gas inlet pipe to the venturi (Fig. 49)and pull the sensi

4214.0 Changing Components© Baxi Heating UK Ltd 2013Fig. 74CoverBurnerGasketExtension Piece(Not on 33 & 40 models)CollectorVenturiHeatExchangerRea

4314.0 Changing Components© Baxi Heating UK Ltd 201314.8 Flue/Heat Exchanger Thermostat Sensor (Fig. 76)1. Ease the retaining tab on the sensor away a

4414.0 Changing Components© Baxi Heating UK Ltd 201314.13 Pump - Head Only (Fig. 79)1. Drain the primary circuit and remove the socket headscrews secu

4514.0 Changing Components© Baxi Heating UK Ltd 201314.16 Pressure Gauge (Figs. 82 & 83) 1. Drain the primary circuit and undo the nut on the

4614.0 Changing Components© Baxi Heating UK Ltd 201314.19 Plate Heat Exchanger (Fig. 86)1. Drain the primary circuit and remove the gas valve asdescri

4714.0 Changing Components© Baxi Heating UK Ltd 201314.21 P.C.B. (Fig. 90)1. Note the settings of the temperature control knobs,rotate them fully anti

4814.0 Changing Components© Baxi Heating UK Ltd 201314.23 Gas Valve (Fig. 91)IMPORTANT: After replacing the valve the CO2must bechecked and adjusted a

4915.0 Setting the Gas Valve© Baxi Heating UK Ltd 2013Selector SwitchDisplaybar01234Central Heating Temperature ControlDomestic Hot Water Temperature

5Safe Manual Handling© Baxi Heating UK Ltd 2013GeneralThe following advice should be adhered to, from when first handling the boiler to the final stag

5016.0 Electrical© Baxi Heating UK Ltd 2013- brown- black- blue- whitebrbkbw- green- green / yellow- redgg/yr Control PCBX2 X3X9X5011212 3344556789X11

5117.0 Short Parts List© Baxi Heating UK Ltd 2013Short Parts ListKey G.C. Description ManufacturersNo.No. Part No.311 Fan 5121447426 Motor 3 way Valve

5218.0 Fault Finding© Baxi Heating UK Ltd 2013NOTE: When instructed to turn theselector to the reset position turn theselector switch fully anticlockw

5318.0 Fault Finding© Baxi Heating UK Ltd 2013Refer to Section 16.0 “Illustrated Wiring Diagram” for position of terminals and componentsCentral Heati

5418.0 Fault Finding© Baxi Heating UK Ltd 2013Turn selector switch to The display illuminatesError 20, 28 or 50 flashingError 119 flashingB

5518.0 Fault Finding© Baxi Heating UK Ltd 2013Fault Finding Solutions SectionsIs there 230V at:Is there 230V at:Main terminals L and N Check electrica

5618.0 Fault Finding© Baxi Heating UK Ltd 2013Temperature sensors faulty.Cold resistance approximately10kê @ 25° C (DHW and CH sensors)20kê @ 25° C

57© Baxi Heating UK Ltd 201318.0 Fault FindingCheck and correct if necessary1. The mechanical set of the gas valve(CO2 values - see instruction)2. Fla

GAS BOILER SYSTEM COMMISSIONING CHECKLISTThis Commissioning Checklist is to be completed in full by the competent person who commissioned the boiler a

Service RecordIt is recommended that your heating system is serviced regularly and that the appropriate Service Interval Record is completed.Service P

6© Baxi Heating UK Ltd 2013CONTENTS1.0 Introduction 72.0 General Layout 83.0 Appliance Operation 94.0 Technical Data 105.0 Dimensions and Fixings 116.

© Baxi Heating UK Ltd 2013UK Comp No5122323 - Iss 15 - 6/13BAXI A Trading Division of Baxi Heating UK Ltd (3879156)Brooks House, Coventry Road, Warwic

71.0 Introduction© Baxi Heating UK Ltd 20131.1 Description1. The Baxi Duo-tec Combi HE A is a fully automatic gas firedwall mounted condensing combina

82.0 General Layout© Baxi Heating UK Ltd 20132.1 Layout1. Expansion Vessel2. Automatic Air Vent3. DHW Plate Heat Exchanger4. Circulation Pump5. Drain

93.0 Appliance Operation© Baxi Heating UK Ltd 20133.1 Central Heating Mode (Fig. 2)1. With a demand for heating, the pump circulates waterthrough the