Changing Components, Igniter Fig | Potthof & Co 24kw, 33kw, 28kw

Electrode

Leads

Fig. 80

Spark

Electrode

Electrode

Leads

Fig. 81

Bracket

Igniter

Igniter Feed

Plug

Sensing

Electrode

14.0 Changing Components

IMPORTANT: When changing components ensure that both the gas and electrical supplies to the boiler are isolated before any work is started. When the component has been changed turn the selector switch fully anticlockwise against the spring pressure to the reset position and hold for 5 seconds to reset the boiler before recommissioning.

See Section 13.2 “Annual Servicing” for removal of case panel, door etc.

14.1Igniter (Fig. 80)

1.Disconnect the igniter feed plug and the electrode leads, noting their positions.

2.Undo the screw securing the bracket to the boiler.

3.Remove the igniter and transfer the bracket to the new component.

4.Reassemble in reverse order.

14.2Spark and Sensing Electrodes (Fig. 81)

1.Disconnect the electrode leads, noting their positions.

2.Remove the retaining screws securing each of the electrodes to the combustion box cover and remove the electrodes.

3.Check the condition of the sealing gasket and replace if necessary. Reassemble in reverse order.

42© Baxi Heating UK Ltd 2012

Image 42

Potthof & Co 24kw, 33kw, 28kw manual Changing Components, Igniter Fig, Spark and Sensing Electrodes Fig

Contents

Installation & Service Instructions Natural Gas Benchmark Scheme Installer Notification Guidelines Scheme Members only Important Installation, Commissioning, Service & Repair LegislationCodes of Practice refer to the most recent version Preparation Safe Manual HandlingGeneral Technique Contents Contents of Pack IntroductionDescription Expansion Vessel Automatic Air Vent General LayoutLayout Circulation Pump Drain Off Point Frost Protection Mode Central Heating Mode FigDomestic Hot Water Mode Fig Appliance Operation Technical Data Gold Combi 24, 28 & 33 HE a Dimensions and Fixings Central Heating Circuit System DetailsInformation Bypass Safety Pressure Relief Valve Fig System Filling and Pressurising FigExpansion Vessel Central Heating only Domestic Hot Water Circuit Fig ShowersHard Water Areas Clearances Figs Site RequirementsLocation At least Gas Supply Site RequirementVentilation of Compartments Electrical Supply Per Metre PerPipe run Minimum Fall Run Minimum Fall 50mm per500mm min Run Minimum fall Below windows or openings on pitched roofs 2000 Plume Displacement KitFlue Likely flue positions requiring a flue terminal guard Flue Options Total equivalent length = +B+C+2x90Bends Total Equivalent Length = +B+C+1x90Bend Flue Accessories Key Accessory Size Code NoTelescopic Flue inc. elbow Twin Flue Duct Adaptor Twin Flue ConnectionAir Duct Connection Flue Duct Connection Boiler Adaptor Flue Trim Flue DimensionsFor Roof Terminals Terminal Guard Fig Plume Displacement Plume Displacement Kit Fig Example 28/33Determining Permissible Lengths Elbow 50mm General Fitting Notes30mm Using a suitable bit e.g mm, drill through Elbow to allow the flue to be installed as shown60Ø extension piece. It must be secured using two Extension and outlet. Secure using two of the screws Flushing InstallationUnpacking & Initial Preparation After considering the site requirements Fitting the Filling Loop Kit Condensate Drain see section Fitting the Safety Pressure Relief Discharge Pipe FigFitting The Boiler Tighten all the connections Ensure Elbow is fully engaged into Boiler Adaptor Fitting The FlueWall Thickness Flue Elbow Wall Thickness Waste Flue Inner Flue Support Bracket 25mm Extension Cut EndEnsure Extension is fully engaged into Boiler Adaptor Making The Electrical Connections Preliminary Electrical ChecksTerminal Block Cover Cable Clamp Commissioning the Boiler Selector Switch DisplayCommissioning Screw Pump Automatic Air Vent Check the Operational Working Gas Inlet Pressure Temperature Control Selector Switch DisplayTemperature Control Gas Pressure Test Point Gas Valve It is necessary to set the boiler to ‘Calibration Mode’ Setting the Timer Completion CompletionCase Front Panel Facia Panel Servicing 13 .1 Annual ServicingAnnual Servicing Inspection Electrode Position 10 ±1 Changing Components Igniter FigSpark and Sensing Electrodes Fig Injector Fig Fan FigVenturi Fig Gasket Venturi Injector Cover Gas Inlet Pipe Fan Collector Burner Fig Insulation FigExtension Piece DHW Temperature Sensor NTC Fig Central Heating Temperature Sensor NTC FigSafety Thermostat Fig Flue/Heat Exchanger Thermostat Sensor Fig Pump Head Only Fig Pump Complete FigAutomatic Air Vent Fig Pressure Gauge Figs Hall Effect Sensor FigPressure Relief Valve Fig Diverter Valve Motor Unit & Assembly Fig Plate Heat Exchanger Fig Selector Switch Fig 14.22 P.C.B. Fig Gas Valve Fig Expansion Vessel Fig Flue Adaptor Test Point Plug Analyser Probe Setting the Gas ValveSetting the Gas Valve CO2 check CO2 should be 8.4% ± Reduce CO2 Illustrated Wiring Diagram Electrical 426 Short Parts ListShort Parts List 315316 311 404419 422 400 415 Fault Finding Initial Fault Finding ChecksError Codes Reset position for 5 seconds Error 133 flashingGo to section ‘A’ Turn the selector switch to Pump runs Open DHW tap fully Error 133 flashing Go to section ‘I’Turn Domestic Hot Water Close DHW tap Fan jammed or faulty winding Replace PCB PCB X3 connector terminals 3Switch terminal Replace water Gas at burner Check wiring Viewing WindowReplace sensor or PCB E28 Replace gas valve Replace safety thermostat Replace PCB Is there 230V atReplace sensor Pages for Notes Pages for Notes GAS Boiler System Commissioning Checklist Service Record Potterton