Baxi Potterton Gold HE A Range Flue/Heat Exchanger Thermostat Sensor Fig, Safety Thermostat Fig

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Electrical

Plug

Fig. 87

Flow Pipe

Flue/Heat Exchanger Thermostat Sensor

Central Heating

Temperature Sensor

14.0Changing Components

14.8Flue/Heat Exchanger Thermostat Sensor (Fig. 87)

1.Ease the retaining tab on the sensor away and disconnect the electrical plug.

2.Turn the sensor 90° anticlockwise to remove - it is a bayonet connection.

3.Reassemble in reverse order.

14.9Water Pressure Sensor (Fig. 89)

1.Drain the primary circuit.

2.Disconnect the two wires from the sensor.

3.Undo the nut on the flow pipe securing and sealing the sensor.

4.Remove the sensor, examine the sealing washer, replacing if necessary.

5.Reassemble in reverse order. The component is not polarised - either wire will fit each terminal.

14.10Central Heating Temperature Sensor (NTC) (Fig. 88)

1.Ease the retaining tab on the sensor away and disconnect the electrical plug.

2.Unscrew the sensor from it’s pocket and reassemble in reverse order. The plug will only fit one way.

14.11Safety Thermostat (Fig. 88)

Fig. 88

Pressure Sensor

Fig. 89

Safety Thermostat

Plate Heat

Exchanger

DHW Temperature

Sensor

1.Pull the plug off the thermostat.

2.Remove the screws securing the thermostat to the mounting plate on the flow pipe.

3.Reassemble in reverse order, ensuring that the plug is pushed fully on.

14.12DHW Temperature Sensor (NTC) (Fig. 89)

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 electrical plug.

3.Unscrew the sensor from the plate heat exchanger manifold. Examine the sealing washer,replacing if necessary.

4.Reassemble in reverse order. The plug will only fit one way.

© Baxi Heating UK Ltd 2008

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Contents Installation & Service Instructions BS-EN ISO 9001 Accredited Company Natural GasScheme Members only Installer Notification GuidelinesLegislation Important Installation, Commissioning, Service & RepairCodes of Practice refer to the most recent version Technique Safe Manual HandlingGeneral PreparationContents Introduction Contents of PackDescription Layout General LayoutAppliance Operation Frost Protection ModePump Protection Gold Combi 24, 28 & 33 HE a Technical Data22mm 15mm Dimensions and FixingsOrientation Flue Ø 100mm Tap Rail 32.5 mm Condensate Drain 65 mmBypass System DetailsInformation Central Heating CircuitExpansion Vessel Central Heating only System Filling and Pressurising FigPressure Relief Valve Fig Showers Domestic Hot Water Circuit FigHard Water Areas Location Site RequirementsClearances Figs Electrical Supply Site RequirementVentilation of Compartments Gas SupplyCondensate Drain Flue terminal guard FlueThis bend is equivalent to 1 metre Flue OptionsHorizontal Flues Horizontal Flue SystemsMetre for each 135 bend This bend is equivalent to 1 metre Vertical Flues Twin PipeTwin & Vertical Flue Systems Metre for each 91.5 bendKey Accessory Size Code No Flue Accessories5111079 Air duct adaptor Flue Duct AdaptorFor Twin Flue Systems fit the adaptors as follows Flue Deflector Fig Flue DimensionsFor Roof Terminals Flue TrimPlume Displacement Kit Fig Plume DisplacementMetres Ring Adaptor Example Additional Accessories Elbow 5121369 Elbow Pair 512137028/33 Determining Permissible LengthsExhaust, securing in the brackets Shown in . Complete the installation of the 60ØGeneral Fitting Notes 30mmPlume Outlet Elbow Unpacking & Initial Preparation InstallationFlushing Hose Fitting Cold Inlet Stop Valve Loop and valves must be connected as shown in the diagram aFitting the Filling Loop Double Check Valve Stop Valve Temporary Filling LoopTighten all the connections Fitting The BoilerFitting the Pressure Relief Discharge Pipe Fig Condensate Drain see sectionEnsure Elbow is fully Engaged into Boiler Fitting The FlueWall Thickness Waste Flue ElbowEnsure Flue is fully Engaged into Flue Elbow Inner Flue Support BracketEnsure Extension is Fully engaged into Boiler Adaptor Cable Clamp Making The Electrical ConnectionsPreliminary Electrical Checks Terminal Block CoverHeat Exchanger Automatic Air Vent Screw Pump Selector Switch DisplayCommissioning Commissioning the BoilerChecking Temperature ControlSetting the Timer Completion CompletionCase Front Panel Facia Panel 13 .1 Annual Servicing ServicingBurner Annual ServicingViewing Window Igniter Fig Changing ComponentsSpark and Sensing Electrodes Fig Gasket Venturi Injector Cover Gas Inlet Pipe Fan Collector Fan FigVenturi Fig Injector FigInsulation Fig Burner FigExtension Piece Flue/Heat Exchanger Thermostat Sensor Fig Central Heating Temperature Sensor NTC FigSafety Thermostat Fig DHW Temperature Sensor NTC FigAutomatic Air Vent Fig Heat Exchanger Automatic Air Vent FigPump Head Only Fig Pump Complete FigHall Effect Sensor Fig Pressure Gauge FigsPlate Heat Exchanger Fig Diverter Valve Motor Unit & Assembly FigsPin Fig Selector Switch Fig14.20 P.C.B. Fig Completely undo the screws securing the control boxExpansion Vessel Fig Gas Valve FigVenturi Inlet Pipe Combustion Check Temperature Control Selector Switch DisplayChecking the CO2 Electrical Illustrated Wiring DiagramShort Parts List Short Parts ListKey Description Manufacturers Initial Fault Finding Checks Fault FindingError Codes Pump runs Error 133 flashingReset position for 5 seconds Display illuminatesOpen DHW tap fully Error 110 flashingDomestic Hot Water Follow operational sequence Turn Domestic Hot WaterIs there 230V at Main terminals L and N Main terminal fuse PCB X3 connector terminals 3Switch terminal Fan jammed or faulty winding Replace PCBEnsure that the Hall Effect Sensor is in position Gas at burnerReplace gas valve Terminals 1Replace PCB Is there 230V at Replace safety thermostatReplace heat exchanger GAS Boiler Commissioning Checklist Service Interval Record UK Comp No 5116282 Iss 7 4/08 Brooks House, Coventry Road, Warwick. CV34 4LL