Bosch Appliances 24i junior Moving boiler control to service position, Gas valve, Gas adjuster

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5.1

A

7

D

8.1

E

F

REPLACEMENT OF PARTS

5.2

The following components require the control to be moved in to the service position:

Gas valve Siphon PCB fuse Transformer

5. Moving boiler control to service position

 

5.1

Remove screw (A) securing control.

 

5.2

Gently pull forward.

6.1

6. Gas valve

 

Isolate gas supply at boiler gas cock.

 

6.1

Remove wire clip from gas valve outlet then

 

 

pull gas adjustment assembly free from

 

 

plastic connector and pull forward clear of

 

 

case.

 

6.2

Undo bottom gas connection to gas valve.

 

6.3

Undo two securing screws (C) on the

 

 

underside of casing.

 

 

Pull valve up and forward out of boiler.

 

 

Disconnect electrical connections.

 

 

Replace valve with new seals and check for

 

 

gas soundness.

 

Note: The valve will require setting; follow

 

procedure “Setting the gas/air ratio” in the gas

 

conversion section.

6.2

7. Gas adjuster

 

 

 

Isolate gas supply at boiler gas cock.

 

 

Repeat step 6.1 above.

 

 

Twist retaining clip (D) to release then

 

 

remove clip and tube.

 

 

Refit new adjuster and secure with clip.

 

8. Siphon

 

8.1

Undo plastic nut (E) on the siphon outlet.

 

 

Drop condensate tube away from siphon.

 

8.2

Remove hose (F).

6.3

8.3

Remove siphon.

 

SERVICING & SPARES

 

 

C

8.2 8.3

42

INSTALLATION & SERVICING INSTRUCTIONS FOR WORCESTER GREENSTAR 24 i junior/28 i junior 8 716 107 336b (11/05)

REPLACEMENT OF PARTS

Image 43
Contents Liquid Petroleum GAS Appliance is for USE withNatural GAS or L.P.G. Cat II 2H3P Type C13 & C33 Natural GASInstallation & Servicing Instructions Contact Information Installation & Servicing InstructionsContents Installation Regulations Safety PrecautionsStandard Package SpecificationsGeneral Information General InformationTechnical Data Technical DataCompression Trap / Syphon Layout & ComponentsLayout & Components GAS Inlet Connection 22mmLayout & Components Open all drain cocks and drain Cleaning Primary SystemsCleaning Primary Systems Cleaning the Primary SystemMains Supply Mains SupplyWater Systems & Pipework Water Systems & PipeworkCondensate Pipework Condensate PipeworkPressure Relief Pipework Pressure Relief PipeworkBoiler Location & Clearances Ventilation Free Compartments Installation ClearancesServicing Clearances Vented Compartment Boiler Location ClearancesBathrooms Boiler LocationHeating System 22mm compression fittings Plumbing ManifoldPlumbing Manifold ConnectionsFrom a terminal facing the terminal 1200mm Flue Terminal PositionsFlue Terminal Positions Drwg Terminal Position DistanceFlue Options Flue OptionsUnpacking Wall Frame Unpacking Wall Frame Ancillary ItemsAncillary Items Important Handling InstructionsWall Mounting Plate Flue Opening Wall Mounting Template Flue OpeningUnpacking the Appliance Unpacking the ApplianceBoiler Connections Boiler ConnectionsGAS and Water Connections 250mm min Turret Clamp Flue Flue InstallationFlue Installation 189mm 93mm Edge of case 200mmAddition of Flue Bends Additional Notes and Reminders Assembling the FlueFitting the Flue Fitting the ElbowCondensate Connection Condensate ConnectionCondensate Connection Electrics ElectricsPosition of Wired Components Position of Wired ComponentsChecks PRE-COMMISSIONINGPRE-COMMISSIONING Checks Filling the System Filling the SystemStarting the Appliance Switching the appliance on/offStarting the Appliance Water Treatment KEYWater Treatment Commissioning CommissioningReplace Outer Casing Installing Bottom PanelFinishing Commissioning Finishing CommissioningInspection and Service Inspection and ServiceInspection Primary Heat Exchanger Component AccessAdjusting boiler control to Service position Removing outer caseAgain Setting Boiler to MaximumBoiler will stay in this mode for To maximumTo Clean the Heat Exchanger Inspection and Service Small Tab Overheat thermostat Replacement of PartsReplacement of Parts Primary sensorSiphon Moving boiler control to service positionGas adjuster Gas valvePCB fuse Access to boiler control componentsTransformer / PCB Replacing control 12.112.2 12.314.4 13.2 13.314.2 15.3 15.1 15.218.4 18.1 18.2 18.3 22.1 22.2 19.120.1 21.1 21.226.1 26.2 23.1 23.224.1 25.127.2 28.1 28.227.1 Hydraulic BlockPlastic protection device 29.129.2 30.132.3 31.131.2 32.1 32.233.4 33.31112 1415 1718 2021 2324 Short Parts ListG. Conversion G. ConversionCode plugs Code plugFault Finding Fault FindingCentral Heating Function Ignition SequenceCentral Heating Function Preheat and DHW Function Preheat and DHW FunctionProtection Function Protection FunctionGAS Boiler Commissioning Checklist Service Interval Record Bonded Washer 3/4 Excellence Comes AS Standard
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28i junior, 24i junior specifications

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