Baxi Potterton G.C.No 47 393 22, G.C.No 47 393 23 manual Changing Components, Igniter Fig

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Bracket

Igniter

Igniter Feed

Plug

Electrode

Leads

Fig. 76

Spark

Electrode

Electrode

Leads

Sensing

Electrode

Fig. 77

14.0 Changing Components

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 turn the selector switch fully anticlockwise against the spring pressure to the reset position and hold for 5 seconds to reset the boiler before recommissioning.

See Section 13.1 “Annual Servicing” for removal of case panel, door etc.

14.1Igniter (Fig. 76)

1.Disconnect the igniter feed plug and the electrode leads, noting their positions.

2.Undo the screw securing the bracket to the boiler.

3.Remove the igniter and transfer the bracket to the new component.

4.Reassemble in reverse order.

14.2Spark and Sensing Electrodes (Fig. 77)

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 gasket and replace if necessary. Reassemble in reverse order.

38© Baxi Heating UK Ltd 2011

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Contents Installation & Service Instructions 0086 Installer Notification Guidelines Scheme Members onlyCodes of Practice refer to the most recent version Important Installation, Commissioning, Service & RepairLegislation Preparation Safe Manual HandlingGeneral TechniqueContents Description Contents of PackIntroduction General Layout LayoutPump Protection Frost Protection ModeAppliance Operation Technical Data Promax Combi 24, 28Tap Rail Dimensions and FixingsOrientation 32.5 mm Condensate Drain 65 mmCentral Heating Circuit System DetailsInformation BypassPressure Relief Valve Fig System Filling and Pressurising FigExpansion Vessel Central Heating only Hard Water Areas Domestic Hot Water Circuit FigShowers At Least 1.5 7.2 Clearances Figs Site RequirementsLocation Gas Supply Site RequirementVentilation of Compartments Electrical SupplyCondensate Drain Flue Flue terminal guardHorizontal Flue Systems Each fitting to aid assemblyFlue Options Horizontal Flues120mm Min Vertical FluesTwin & Vertical Flue Systems ApartTelescopic Internal Flue Kit Flue AccessoriesKey Accessory Size Code No Air Duct Connection Flue Duct Connection Boiler Adaptor Twin Flue Duct AdaptorTwin Flue Connection Flue Trim Flue DimensionsFor Roof Terminals Terminal Guard FigMetres Ring Adaptor Plume DisplacementPlume Displacement Kit Fig Example 28/33Determining Permissible Lengths 5121368General Fitting Notes 30mmUsing a suitable bit e.g mm, drill through Elbow to allow the flue to be installed as shown60Ø extension piece. It must be secured using two Extension and outlet. Secure using two of the screwsFlushing InstallationUnpacking & Initial Preparation After considering the site requirementsCondensate Drain see section Fitting The BoilerFitting the Pressure Relief Discharge Pipe Fig Tighten all the connectionsFlue Elbow Fitting The FlueWall Thickness Waste Ensure Elbow is fully Engaged into BoilerEnsure Extension is fully engaged into Boiler Adaptor Inner Flue Support Bracket25mm Extension Cut End Terminal Block Cover Cable Clamp Making The Electrical ConnectionsPreliminary Electrical Checks Commissioning Commissioning the BoilerPressure Case Front Panel Facia Panel Completion Completion Annual Servicing Inspection Servicing13 .1 Annual Servicing Case Front Panel Facia Panel Securing ScrewsViewing Window 10 ±1Burner Sensing Electrode Spark and Sensing Electrodes Fig Changing ComponentsIgniter Fig Injector Fig Fan FigVenturi Fig Gasket Venturi Injector Cover Gas Inlet Pipe Fan CollectorBurner Gasket Extension Piece Burner FigInsulation Fig DHW Temperature Sensor NTC Fig Central Heating Temperature Sensor NTC FigSafety Thermostat Fig Flue/Heat Exchanger Thermostat Sensor FigAutomatic Air Vent Fig Pump Head Only FigPump Complete Fig Pressure Gauge Figs Hall Effect Sensor FigDiverter Valve Motor Unit & Assembly Fig Plate Heat Exchanger FigSelector Switch Fig 14.22 P.C.B. FigExpansion Vessel Fig Throttle Adjustment ScrewGas Valve Fig Flue Adaptor Test Point Plug Analyser Probe Setting the Gas ValveSetting the Gas Valve CO2 check ThrottleIllustrated Wiring Diagram Electrical306 Short Parts ListShort Parts List 302Error Codes Fault FindingInitial Fault Finding Checks Reset position for 5 seconds Error 133 flashingGo to section ‘A’ Turn the selector switch to Pump runsTurn Domestic Hot Water Turn selector switch toError 133 flashing Go to section ‘I’ Open DHW tap fullyFan jammed or faulty winding Replace PCB PCB X3 connector terminals 3Switch terminal Replace waterGas at burner Check wiring Viewing WindowReplace sensor or PCB E28 Replace gas valveReplace sensor Replace safety thermostatReplace PCB Is there 230V at Page Page Condensing Boilers only Service Record Brooks House, Coventry Road, Warwick. CV34 4LL