Baxi Potterton 47-393-40 manual Plate Heat Exchanger Fig, Diverter Valve Motor Unit & Assembly Fig

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Plate Heat Exchanger

LH Location Stud

Fig. 94

Rubber Seal

Motor Unit

Multi-pin Plug

Retaining Clip

Valve

Assembly

Fig. 95

Pressure Sensor

14.0Changing Components

14.20Plate Heat Exchanger (Fig. 94)

1.Drain the boiler primary circuit and remove the gas valve as described in section 14.24.

2.While supporting the heat exchanger undo the screws securing it to the brass manifolds.

3.Withdraw the heat exchanger upwards, taking care not to damage any wires or controls.

Seals

4.There are four rubber seals between the manifolds and heat exchanger which may need replacement.

5.Ease the seals out of the manifold. Replace carefully, ensuring that when the seal is inserted into the manifold it is parallel and pushed fully in.

6.When fitting the new heat exchanger note that the left hand location stud is offset towards the centre more than the right hand one.

7.Reassemble in reverse order.

14.21Diverter Valve - Motor Unit & Assembly (Fig. 95)

1.To replace the motor unit, disconnect the multi-pin plug.

2.Pull off the retaining clip and remove the motor unit.

3.The motor unit can now be replaced, or the valve assembly removed.

4.Drain the primary circuit and draw off any hot water once the isolating taps are closed.

5.Undo the nuts on the tap rail under the boiler. Remove the screws securing the valve assembly to the boiler bottom panel and plate heat exchanger.

6.Remove the valve assembly. Examine any seals or washers, replacing if necessary. Transfer the DHW NTC to the new valve and reassemble in reverse order.

48© Baxi Heating UK Ltd 2012

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Contents
Installation & Service Instructions Natural Gas Potterton TitaniumInstaller Notification Guidelines Scheme Members onlyImportant Installation, Commissioning, Service & Repair LegislationCodes of Practice refer to the most recent version Safe Manual Handling GeneralPreparation TechniqueContents Contents of Pack IntroductionDescription Domestic Hot Water Mode Light Display General LayoutLayout Expansion Vessel Automatic Air VentCentral Heating Mode Fig Domestic Hot Water Mode FigFrost Protection Mode Appliance OperationTechnical Data Titanium 24, 28, 33Dimensions and Fixings OrientationTap Rail 32.5 mm Condensate Drain 65 mm 22mm 15mmSystem Details InformationCentral Heating Circuit BypassSystem Filling and Pressurising Fig Expansion Vessel Central Heating onlyPressure Relief Valve Fig Domestic Hot Water Circuit Fig ShowersHard Water Areas Site Requirements LocationAt Least 1.5 7.2 Clearances Figs Site Requirement Ventilation of CompartmentsGas Supply Electrical SupplyCondensate Drain 50mm per 500mm minRun Minimum fallBoiler External runs & those InsulationFlue Each fitting to aid assembly Flue OptionsHorizontal Flue Systems Horizontal FluesVertical Flues Twin & Vertical Flue Systems120mm Min ApartFlue Accessories Key Accessory Size Code NoTelescopic Internal Flue Kit Twin Flue Duct Adaptor Twin Flue ConnectionAir Duct Connection Flue Duct Connection Boiler Adaptor Flue Dimensions For Roof TerminalsFlue Trim Terminal Guard FigPlume Displacement Plume Displacement Kit FigElbow/Plume Outlet Assembly Ring Bracket28/33/40 Determining Permissible LengthsExample Example Flue Lengths OKGeneral Fitting Notes 30mmElbow to allow the flue to be installed as shown 60Ø extension piece. It must be secured using twoUsing a suitable bit e.g mm, drill through Extension and outlet. Secure using two of the screwsInstallation Unpacking & Initial PreparationFlushing After considering the site requirementsFitting the Filling Loop Kit Fitting The Boiler Fitting the Pressure Relief Discharge Pipe FigCondensate Drain see section Fitting The Flue Wall Thickness Flue ElbowEnsure Elbow is fully engaged into Boiler Adaptor Wall Thickness Waste FlueInner Flue Support Bracket 25mm Extension Cut EndEnsure Extension is fully engaged into Boiler Adaptor Making The Electrical Connections Preliminary Electrical ChecksSelector Switch Display CommissioningCommissioning the Boiler Screw Pump Automatic Air VentPressure Setting the Timer Completion CompletionCase Front Panel Facia Panel Servicing 13 .1 Annual ServicingAnnual Servicing Inspection 10 ±1 Burner Sensing ElectrodeViewing Window Changing Components Igniter FigSpark and Sensing Electrodes Fig Fan Fig Venturi FigInjector Fig Gasket Venturi Injector Cover Gas Inlet Pipe Fan Collector Burner Fig Insulation Fig Burner Gasket Extension Piece Central Heating Temperature Sensor NTC Fig Safety Thermostat FigDHW Temperature Sensor NTC Fig Flue/Heat Exchanger Thermostat Sensor FigPump Head Only Fig Pump Complete FigAutomatic Air Vent Fig Pressure Gauge Figs Hall Effect Sensor FigDiverter Valve Motor Unit & Assembly Fig Plate Heat Exchanger FigSelector Switch Fig 14.22 P.C.B. FigThrottle Adjustment Screw Gas Valve FigExpansion Vessel Fig Setting the Gas Valve Setting the Gas Valve CO2 checkFlue Adaptor Test Point Plug Analyser Probe ThrottleIllustrated Wiring Diagram ElectricalShort Parts List Short Parts List306 302Fault Finding Initial Fault Finding ChecksError Codes Error 133 flashing Go to section ‘A’ Turn the selector switch toReset position for 5 seconds Pump runsTurn selector switch to Error 133 flashing Go to section ‘I’Turn Domestic Hot Water Open DHW tap fullyPCB X3 connector terminals 3 Switch terminalFan jammed or faulty winding Replace PCB Replace waterCheck wiring Viewing Window Replace sensor or PCB E28Gas at burner Replace gas valveReplace safety thermostat Replace PCB Is there 230V atReplace sensor Page Page GAS Boiler System Commissioning Checklist Service Record Potterton
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