Baxi Potterton Gold HE A Range manual Plate Heat Exchanger Fig

Page 46

Plate Heat Exchanger

LH Location Stud

Fig. 98

Rubber Seal

Motor Unit

Multi-pin Plug

Retaining Clip

Valve

Assembly

Fig. 99

Pressure Sensor

Bypass Pipe

Spring Clip

Fig. 100

Securing Screw

14.0Changing Components

14.18Plate Heat Exchanger (Fig. 98)

1.Drain the boiler primary circuit and remove the gas valve as described in section 13.22.

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.

14.19Diverter Valve - Motor Unit & Assembly (Figs. 99 & 100)

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.Remove the spring clip retaining the bypass pipe to the rear of the assembly and under the flow pipe nut at the left hand side.

6.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.

7.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.

46© Baxi Heating UK Ltd 2008

Image 46

Contents Installation & Service Instructions Natural Gas BS-EN ISO 9001 Accredited CompanyInstaller Notification Guidelines Scheme Members onlyLegislation Important Installation, Commissioning, Service & RepairCodes of Practice refer to the most recent version Preparation Safe Manual HandlingGeneral TechniqueContents Introduction Contents of PackDescription General Layout LayoutAppliance Operation Frost Protection ModePump Protection Technical Data Gold Combi 24, 28 & 33 HE aFlue Ø 100mm Tap Rail 32.5 mm Condensate Drain 65 mm Dimensions and FixingsOrientation 22mm 15mmCentral Heating Circuit System DetailsInformation BypassExpansion Vessel Central Heating only System Filling and Pressurising FigPressure Relief Valve Fig Showers Domestic Hot Water Circuit FigHard Water Areas Location Site RequirementsClearances Figs Gas Supply Site RequirementVentilation of Compartments Electrical SupplyCondensate Drain Flue Flue terminal guardHorizontal Flue Systems Flue OptionsHorizontal Flues This bend is equivalent to 1 metreMetre for each 91.5 bend Vertical Flues Twin PipeTwin & Vertical Flue Systems Metre for each 135 bend This bend is equivalent to 1 metreKey Accessory Size Code No Flue Accessories5111079 Air duct adaptor Flue Duct AdaptorFor Twin Flue Systems fit the adaptors as follows Flue Trim Flue DimensionsFor Roof Terminals Flue Deflector FigPlume Displacement Kit Fig Plume DisplacementMetres Ring Adaptor Determining Permissible Lengths Additional Accessories Elbow 5121369 Elbow Pair 512137028/33 Example30mm Shown in . Complete the installation of the 60ØGeneral Fitting Notes Exhaust, securing in the bracketsPlume Outlet Elbow Unpacking & Initial Preparation InstallationFlushing Double Check Valve Stop Valve Temporary Filling Loop Loop and valves must be connected as shown in the diagram aFitting the Filling Loop Hose Fitting Cold Inlet Stop ValveCondensate 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 Flue is fully Engaged into Flue Elbow Inner Flue Support BracketEnsure Extension is Fully engaged into Boiler Adaptor Terminal Block Cover Making The Electrical ConnectionsPreliminary Electrical Checks Cable ClampCommissioning the Boiler Selector Switch DisplayCommissioning Heat Exchanger Automatic Air Vent Screw PumpTemperature Control CheckingSetting the Timer Completion CompletionCase Front Panel Facia Panel Servicing 13 .1 Annual ServicingBurner Annual ServicingViewing Window Igniter Fig Changing ComponentsSpark and Sensing Electrodes Fig Injector Fig Fan FigVenturi Fig Gasket Venturi Injector Cover Gas Inlet Pipe Fan CollectorInsulation Fig Burner FigExtension Piece DHW Temperature Sensor NTC Fig Central Heating Temperature Sensor NTC FigSafety Thermostat Fig Flue/Heat Exchanger Thermostat Sensor FigPump Complete Fig Heat Exchanger Automatic Air Vent FigPump Head Only Fig Automatic Air Vent FigPressure Gauge Figs Hall Effect Sensor FigDiverter Valve Motor Unit & Assembly Figs Plate Heat Exchanger FigCompletely undo the screws securing the control box Selector Switch Fig14.20 P.C.B. Fig Pin FigExpansion Vessel Fig Gas Valve FigVenturi Inlet Pipe Combustion Check Temperature Control Selector Switch DisplayChecking the CO2 Illustrated Wiring Diagram ElectricalShort Parts List Short Parts ListKey Description Manufacturers Initial Fault Finding Checks Fault FindingError Codes Display illuminates Error 133 flashingReset position for 5 seconds Pump runsTurn Domestic Hot Water Error 110 flashingDomestic Hot Water Follow operational sequence Open DHW tap fullyFan jammed or faulty winding Replace PCB PCB X3 connector terminals 3Switch terminal Is there 230V at Main terminals L and N Main terminal fuseTerminals 1 Gas at burnerReplace gas valve Ensure that the Hall Effect Sensor is in positionReplace PCB Is there 230V at Replace safety thermostatReplace heat exchanger GAS Boiler Commissioning Checklist Service Interval Record Brooks House, Coventry Road, Warwick. CV34 4LL UK Comp No 5116282 Iss 7 4/08