Baxi Potterton 24 Eco HE manual Diverter Valve Assembly, Flow Regulator Figs

Page 37

12.0CHANGING COMPONENTS

12.21Diverter Valve Assembly (Cont)

CH Pressure Differential Valve (Fig. 71)

1.

Remove the DHW pressure differential valve as

described above.

2.

From the brass diverter manifold undo the nut on

the heating flow pipe. Remove the screw securing the

diverter manifold to the appliance lower bracket.

3.

Disconnect the pressure gauge capillary from the

diverter manifold and remove the two wires from the

microswitch.

4.

Prise off the spring clip securing the by-pass pipe

to the diverter manifold and disconnect the sensing

pipe.

Microswitch &

Bracket

Diaphragm

Heating

Flow Pipe

Fig. 71

Central Heating

Pressure Differential

Valve

Sensing Pipe

By-pass

Pipe

Spring Clip

5.

Ease the diverter manifold out of the plate heat

exchanger manifold. Remove the assembly from the

appliance.

6.

Undo the screw securing the microswitch bracket

to the valve body. The sensor may now be

dismantled to examine the diaphragm.

7.

To examine the diaphragm hold the assembly

securely and carefully remove the four screws. The

diaphragm spring will force the two halves of the

valve apart.

8.

Carefully examine the diaphragm and replace it if

there is any damage.

9.

Reassemble in reverse order.

CH Pressure Microswitch (Fig. 71)

1.Remove the two wires from the pressure microswitch.

2.Undo the screw securing the microswitch bracket to the valve body.

3.Reassemble in reverse order.

Diverter Manifold

Pressure Gauge

Capillary

12.22Flow Regulator (Figs. 71 & 72)

1.Undo the filter cartridge from the inlet/return manifold.

Cartridge

2. Unscrew the venturi and remove the flow regulator.

3. Check the cleanliness of the filter gauze, rinsing thoroughly in clean water as necessary. Fit the new flow regulator and reassemble in reverse order.

Body

Filter Gauze

Fig. 85

Flow

Regulator

Venturi

Inlet / Return Manifold

Fig. 72

Publication No. 5111811

37

Image 37
Contents Performa Contents Scheme Members only Installer Notification GuidelinesLegislation Important Installation, Commissioning, Service & RepairDescription IntroductionOptional Extras Layout General LayoutDomestic Hot Water Mode Fig Central Heating Mode FigAppliance Operation Central Heating Circuit KeyTechnical Data Gas Inlet 68mm Dimensions and Fixings95mm 65mm Left Hand Side 130mm BoilerInformation System DetailsCentral Heating Circuit BypassExpansion Vessel Central Heating only System Filling and PressurisingPressure Relief Valve Fig Showers Domestic Hot Water CircuitHard Water Areas Location Site RequirementsGas Supply Ventilation of CompartmentsElectrical Supply Condensate Drain Likely flue positions requiring Flue terminal guard FlueFlue Trim Flue DimensionsTerminal Guard Fig Maximum permissible flue length is 4 metresFlue Options Horizontal Flues Vertical Twin PipeInitial Preparation InstallationFlushing Preparing The BoilerFitting the Pressure Relief Discharge Pipe Fig Fitting The BoilerFitting The Flue Condensate Drain see sectionVertical Flue Key to Wiring Functional Flow DiagramMaking The Electrical Connections Preliminary Electrical ChecksCommissioning the Boiler CommissioningChecking the Burner Pressure Adjusting the Pressure FigCompletion Completion11 .1 Annual Servicing Servicing the BoilerW. Filters Fig Annual ServicingInlet / Return Manifold Changing Components Pressure Switch FigBurner Fig Heat Exchanger FigElectrodes Fig Injectors FigInsulation Fig Safety Thermostat Fig Temperature Sensor FigGas Valve Fig Pump Complete Figs Pump Head Only FigsAutomatic Air Vent Fig Expansion Vessel Fig Pressure Gauge FigsCondensate Trap Fig 12.18 P.C.B. Fig Selector Switch FigPlate Heat Exchanger Fig Diverter Valve Assembly FigSeals DHW Pressure Differential Valve FigCH Pressure Microswitch Fig Diverter Valve AssemblyFlow Regulator Figs CH Pressure Differential Valve FigFlue Overheat Thermostat Fig Secondary Heat Exchanger FigElectrical Illustrated Wiring DiagramControl PCB Short Parts List Short Parts ListCarry out initial fault finding checks Fault FindingOperation sequence Correct Operation sequence Fault Finding Solutions Sections a to E Fault Finding PCB GAS Boiler Commissioning Checklist Service 3 Date Service 1 DateService 5 Date Service 7 DateGeneral Enquiries GB Service GBTechnical GB Literature Request GB

24 Eco HE specifications

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