Baxi Potterton 33 HE Service Manual

© Baxi Heating UK Ltd 2014Installation & Service InstructionsThese instructions include the Benchmark CommissioningChecklist and should be left wi

104.0 Technical Data© Baxi Heating UK Ltd 20144.1 Promax Combi 24, 28 & 33Flue Terminal Diameter 100mmDimensions Projection 125mmOutercase Dimensi

115.0 Dimensions and Fixings© Baxi Heating UK Ltd 2014DimensionsA 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 20146.1 Information1. The Promax Combi Condensing Combination Boiler is a‘Water Byelaws Scheme - Approved Pr

136.0 System Details© Baxi Heating UK Ltd 20146.5 System Filling and Pressurising (Fig. 4) 1. A filling point connection on the central heating return

146.0 System Details© Baxi Heating UK Ltd 20146.8 Domestic Hot Water Circuit (Fig. 7)1. All DHW circuits, connections, fittings, etc. should be fullyi

157.0 Site Requirements© Baxi Heating UK Ltd 20147.1 Location1. The boiler may be fitted to any suitable wall with the fluepassing through an outside

167.0 Site Requirement© Baxi Heating UK Ltd 20147.3 Ventilation of Compartments1. Where the appliance is installed in a cupboard orcompartment, no air

17© Baxi Heating UK Ltd 20147.0 Site Requirements7.7 Condensate DrainFAILURE TO INSTALL THE CONDENSATEDISCHARGE PIPEWORK CORRECTLY WILL AFFECTTHE RELI

18© Baxi Heating UK Ltd 20127.0 Site Requirements7.7 Condensate Drain (cont.)11. When discharging condensate into a soil stack or waste pipethe effect

19© Baxi Heating UK Ltd 20147.0 Site Requirements7.8 FlueNOTE: Due to the nature of the boiler a plume of watervapour will be discharged from the flue

2© Baxi Heating UK Ltd 2014Natural GasPotterton Promax Combi 24 HE Plus AG.C.No47 393 21Potterton Promax Combi 28 HE Plus AG.C.No47 393 22Potterton Pr

20© Baxi Heating UK Ltd 20148.0 Flue OptionsHorizontalFlues(ii)(i)Plume Displacement Kit 60 /100 Ø 1M Extensions, 45° & 93° bends arealso availabl

21© Baxi Heating UK Ltd 20148.0 Flue OptionsVerticalFlues(ii)(i)The total equivalent length for this example is= 6.5 metres.1m extension135°bend91.5°b

22© Baxi Heating UK Ltd 20148.0 Flue OptionsBK,K1RDCNU,WSLHMEGFPKey Accessory Size Code NoFLUE GROUP AConcentric Flue System 100mm diameterA Horizonta

23© Baxi Heating UK Ltd 20148.0 Flue Options8.4 Twin Flue Duct Adaptor1. The kit allows connection of a twin flue system to theboiler adaptor.8.5 Twin

24© Baxi Heating UK Ltd 20148.0 Flue OptionsFig. 19Fig. 21100mm685mmPush Fit AdaptorAir DuctFlue DuctCut the sameamount off theAir Duct &Flue Duct

259.0 Plume Displacement© Baxi Heating UK Ltd 20149 .1 Plume Displacement Kit (Fig. 23)Kit No 5118638Content of kit1 0.9m 60/100 Concentric Flue1 1m 6

269.0 Plume Displacement© Baxi Heating UK Ltd 2014Concentric 60/100 Flue60Ø ExhaustXYFig. 2620246810121460 Ø Exhaust (metres) XConcentric 60/100 Flue

27© Baxi Heating UK Ltd 20149.0 Plume DisplacementMin. 2 metresFig. 2850mmFlue TrimPosition of ‘Jubilee’ ClipscrewFig. 3330mm30mmFig. 30Fig. 32Fig. 29

289.0 Plume Displacement© Baxi Heating UK Ltd 20149.3 General Fitting Notes (cont.)15. For aesthetic purposes it is permissible to route the60Ø exhaus

2910.0 Installation© Baxi Heating UK Ltd 2014Fig. 42145mmFor Side Flue ExitCentral Heating ReturnFlushing TubeWall PlateFig. 4110.1 Unpacking & In

3Installer Notification Guidelines© Baxi Heating UK Ltd 2014Choose BuildingRegulations NotificationRouteContact your relevant LocalAuthority Building

3010.0 Installation© Baxi Heating UK Ltd 201410.3 Fitting The Boiler1. Lift the boiler using the Lifting Points as shown by theshaded areas (Fig. 43).

3110.0 Installation© Baxi Heating UK Ltd 201410.6 Fitting The FlueHORIZONTAL FLUE1. The standard flue is suitable for lengths between 100mmminimum and

3210.0 Installation© Baxi Heating UK Ltd 2014 10.6 Fitting the Flue (Cont)6. The centralising collar may be in the waste portion of theflue. In this

3310.0 Installation© Baxi Heating UK Ltd 2014Fig. 56Fig. 55Cable ClampFacia PanelTerminal Block Cover10.7 Making The Electrical ConnectionsThe boiler

3411.0 Commissioning© Baxi Heating UK Ltd 201411.1 Commissioning the Boiler1. Reference should be made to BS:EN 12828 & 14336 whencommissioning th

3511.0 Commissioning© Baxi Heating UK Ltd 2014Set Boiler to Maximum Rate(see 11.1.13)Allow the combustion to stabilise. Do not insert probe toavoid ‘f

3611.0 Commissioning© Baxi Heating UK Ltd 2014 11.3 Check the Operational (Working) Gas Inlet Pressure1. Ensure that all controls are calling for he

3712.0 Completion© Baxi Heating UK Ltd 201412.1 Completion 1. Instruct the user in the operation of the boiler andsystem explaining the operational se

3813.0 Servicing© Baxi Heating UK Ltd 2014Case Front PanelFig. 69Facia Panel SecuringScrewsFig. 70Inner DoorPanelFig. 71Sump13 .1 Annual Servicing1. F

3913.0 Servicing© Baxi Heating UK Ltd 201413.2 Annual Servicing - Inspection (Cont)6. Undo the nut on the gas inlet pipe to the venturi (Fig. 73)and p

4Legislation© Baxi Heating UK Ltd 2014Codes of Practice - refer to the most recent versionIMPORTANT - Installation, Commissioning, Service & Repai

4014.0 Changing Components© Baxi Heating UK Ltd 2014IMPORTANT: When changing components ensure thatboth the gas and electrical supplies to the boiler

4114.0 Changing Components© Baxi Heating UK Ltd 2014CoverGas InletFanVenturiInjectorCollectorBurnerGasketWhen fitting the venturiensure that the arrow

4214.0 Changing Components© Baxi Heating UK Ltd 2014Fig. 81CoverBurnerGasketExtension Piece(On 28 models only)CollectorVenturiHeatExchangerRearInsulat

4314.0 Changing Components© Baxi Heating UK Ltd 2014Central HeatingTemperature SensorSafety ThermostatFlow PipeFig. 84DHW TemperatureSensorFig. 85Pla

4414.0 Changing Components© Baxi Heating UK Ltd 201414.14 Pump - Head Only (Fig. 87)1. Drain the boiler primary circuit and remove the sockethead scre

4514.0 Changing Components© Baxi Heating UK Ltd 201414.17 Pressure Gauge (Figs. 90 & 91) 1. Drain the boiler primary circuit and undo the nut

4614.0 Changing Components© Baxi Heating UK Ltd 201414.20 Plate Heat Exchanger (Fig. 94)1. Drain the boiler primary circuit and remove the gas valveas

4714.0 Changing Components© Baxi Heating UK Ltd 201414.22 P.C.B. (Fig. 98)1. Note the settings of the temperature control knobs,rotate them fully anti

4814.0 Changing Components© Baxi Heating UK Ltd 201414.24 Gas Valve (Fig. 99)IMPORTANT: After replacing the valve the CO2must bechecked and adjusted a

4915.0 Setting the Gas Valve© Baxi Heating UK Ltd 2014Selector SwitchDisplayResetbar01234Central Heating Temperature ControlDomestic Hot Water Tempera

5Safe Manual Handling© Baxi Heating UK Ltd 2014GeneralThe following advice should be adhered to, from when first handling the boiler to the final stag

5016.0 Electrical© Baxi Heating UK Ltd 201416.1 Illustrated Wiring Diagram- brown- black- blue- whitebrbkbw- green- green / yellow- redgg/yr Control P

5117.0 Short Parts List© Baxi Heating UK Ltd 2014Short Parts ListKey G.C. Description ManufacturersNo.No. Part No.311 Fan 5121447426 Motor 3 way Valve

5218.0 Fault Finding© Baxi Heating UK Ltd 2014NOTE: When instructed to turn theselector to the reset position turn theselector switch fully anticlockw

5318.0 Fault Finding© Baxi Heating UK Ltd 2014Refer to Section 16.0 “Illustrated Wiring Diagram” for position of terminals and componentsCentral Heati

5418.0 Fault Finding© Baxi Heating UK Ltd 2014Turn selector switch to The display illuminatesError 20, 28 or 50 flashingError 119 flashingB

5518.0 Fault Finding© Baxi Heating UK Ltd 2014Fault 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 2014E20 or E50 - Temperature sensors faulty.Cold resistance approximately10k @ 25° C (DHW and CH sensors)2

57© Baxi Heating UK Ltd 201418.0 Fault FindingCheck and correct if necessary1. The mechanical set of the gas valve(CO2 values - see instruction)2. Fla

*All installations in England and Wales must be to Local Authority Building Control (LABC) either directly or through aCompetent Persons Scheme. A Bui

www.centralheating.co.ukIt is recommended that your heating system is serviced regularly and that the appropriate Service Interval Record is completed

6© Baxi Heating UK Ltd 2014CONTENTS1.0 Introduction 72.0 General Layout 83.0 Appliance Operation 94.0 Technical Data 105.0 Dimensions and Fixings 116.

© Baxi Heating UK Ltd 2014UK Comp No5114444 - Iss 20 (10/14)All descriptions and illustrations provided in this leaflet have been carefully preparedbu

71.0 Introduction© Baxi Heating UK Ltd 20141.1 Description1. The Potterton Promax Combi HE Plus A is a fully automaticgas fired wall mounted condensin

82.0 General Layout© Baxi Heating UK Ltd 20142.1 Layout1. Expansion Vessel2. Automatic Air Vent3. DHW Plate Heat Exchanger / Automatic Bypass4. Circul

93.0 Appliance Operation© Baxi Heating UK Ltd 20143.1 Central Heating Mode (Fig. 2)1. With a demand for heating, the pump circulates waterthrough the