Baxi Potterton 47-393-40, 47-393-39 manual 13 .1 Annual Servicing, Annual Servicing Inspection

Page 40

13.0 Servicing

Case Front Panel

Fig. 69

Facia Panel Securing

Screws

13 .1 Annual Servicing

1.For reasons of safety and economy, it is recommended that the boiler is serviced annually. Servicing must be performed by a competent person in accordance with B.S. 7967-4.

2.After servicing, complete the relevant Service Interval Record section of the Benchmark Commissioning Checklist at the rear of this publication.

IMPORTANT: During routine servicing, and after any maintenance or change of part of the combustion circuit, the following must be checked:-

•The integrity of the complete flue system and the flue seals.

•The integrity of the boiler combustion circuit and relevant seals as described in Section 13.2.

•The operational gas inlet pressure as described in Section 11.2.1 to 11.2.7 and the gas rate as described in 11.2.8.

•The combustion performance as described in ‘Check the Combustion Performance’ (13.1.4 to 13.1.6 below).

3.Competence to carry out Checking Combustion Performance

B.S. 6798 ‘Specification for Installation & Maintenance of Gas Fired Boilers not exceeding 70kW’ advises that:-

•The person carrying out a combustion measurement should have been assessed as competent in the use of a flue gas analyser and the interpretation of the results.

•The flue gas analyser used should be one meeting the requirements of BS7927 or BS-EN50379-3 and be calibrated in accordance with the analyser manufacturers’ requirements.

•Competence can be demonstrated by satisfactory completion of the CPA1 ACS assessment, which covers the use of electronic portable combustion gas analysers in accordance with BS 7967, Parts 1 to 4.

Check the Combustion Performance (CO/CO2 ratio)

4.Set the boiler to operate at maximum rate as described in Section 15.1.1 to 15.1.6.

5.Remove the plug from the flue sampling point, insert the analyser probe and obtain the CO/CO2 ratio. This must be less than 0.004.

6.If the combustion reading (CO/CO2 ratio) is greater than this, and the integrity of the complete flue system and combustion circuit seals has been verified, and the inlet gas pressure and gas rate are satisfactory either:

• Perform the ‘Annual Servicing - Inspection’ (Section 13.2) & re-check

• Adjust the gas valve (Section 15.0) & re-check

• Replace the gas valve (Section 14.24) & re-check

Inner Door

 

13.2

Annual Servicing - Inspection

Fig. 70

 

 

Panel

1. Ensure that the boiler is cool.

 

 

 

2. Ensure that both the gas and electrical supplies to the

 

 

boiler are isolated.

 

 

3. Slacken the screws securing the facia panel. Lift the outercase

 

 

panel so that its securing tabs are clear of the facia. Remove the

 

 

panel, allowing the facia to hinge down (Fig. 69).

 

 

4. Remove the screws securing the inner door panel. Lift the

 

 

panel slightly to disengage it from the studs on top of the case

 

 

(Fig. 70).

 

 

 

Sump

 

 

 

5. Unscrew the sump from the bottom of the condensate trap

 

 

assembly (Fig. 71) and remove any deposits from the sump and

 

 

trap. Clean as necessary and replace the sump.

 

 

Fig. 71

 

40© Baxi Heating UK Ltd 2012

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Contents
Installation & Service Instructions Natural Gas Potterton TitaniumInstaller Notification Guidelines Scheme Members onlyLegislation Important Installation, Commissioning, Service & RepairCodes of Practice refer to the most recent version Safe Manual Handling GeneralPreparation TechniqueContents Introduction Contents of PackDescription 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 BypassExpansion Vessel Central Heating only System Filling and Pressurising FigPressure Relief Valve Fig Showers Domestic Hot Water Circuit FigHard Water Areas Location Site RequirementsAt 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 ApartKey Accessory Size Code No Flue AccessoriesTelescopic Internal Flue Kit Twin Flue Connection Twin Flue Duct AdaptorAir 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 Pressure Relief Discharge Pipe Fig Fitting The BoilerCondensate Drain see section Fitting The Flue Wall Thickness Flue ElbowEnsure Elbow is fully engaged into Boiler Adaptor Wall Thickness Waste Flue25mm Extension Cut End Inner Flue Support BracketEnsure Extension is fully engaged into Boiler Adaptor Making The Electrical Connections Preliminary Electrical Checks Selector Switch Display Commissioning Commissioning the Boiler Screw Pump Automatic Air VentPressure Setting the Timer Completion CompletionCase Front Panel Facia Panel 13 .1 Annual Servicing ServicingAnnual Servicing Inspection Burner Sensing Electrode 10 ±1Viewing Window Igniter Fig Changing ComponentsSpark and Sensing Electrodes Fig Fan Fig Venturi FigInjector Fig Gasket Venturi Injector Cover Gas Inlet Pipe Fan CollectorInsulation Fig Burner FigBurner Gasket Extension Piece Central Heating Temperature Sensor NTC Fig Safety Thermostat FigDHW Temperature Sensor NTC Fig Flue/Heat Exchanger Thermostat Sensor FigPump Complete Fig Pump Head Only 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. FigGas Valve Fig Throttle Adjustment ScrewExpansion 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 302Initial Fault Finding Checks Fault FindingError 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 PCB Is there 230V at Replace safety thermostatReplace sensor Page Page GAS Boiler System Commissioning Checklist Service Record Potterton
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