Potthof & Co 28kw, 24kw Fitting The Boiler, Fitting the Safety Pressure Relief Discharge Pipe Fig

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Suggested Lifting Points shown as shaded area

Pressure Relief Valve

Fig. 45

Remove Sealing Caps from under the Boiler after lifting into position

Fig. 47

Wall Plate

Sealing

Washers

Fig. 46

10.0Installation

10.4Fitting The Boiler

1.Lift the boiler using the Lifting Points as shown by the shaded areas (Fig. 45). The boiler should be lifted by TWO PEOPLE. Engage the slots at the top rear of the boiler on the wall plate (Fig. 46) (see Safe Manual Handling page 5).

2.Ease the boiler forwards and remove the sealing caps from the boiler connections.

NOTE: A small amount of water may drain from the boiler once the caps are removed.

3.Insert the sealing washers between the valves and pipes on the wall plate and the boiler connections. THE RUBBER WASHERS MUST BE USED ON THE GAS CONNECTION.

4.Tighten all the connections.

10.5Fitting the Safety Pressure Relief Discharge Pipe (Fig. 47)

1.Remove the discharge pipe from the kit.

2.Determine the routing of the discharge pipe in the vicinity of the boiler. Make up as much of the pipework as is practical, including the discharge pipe supplied.

3.The pipework must be at least 15mm diameter and run continuously downwards to a discharge point outside the building. See section 6.7 for further details.

4.Utilising one of the sealing washers, connect the discharge pipe to the adaptor and tighten the nut.

5.Complete the discharge pipework and route it to the outside discharge point.

IMPORTANT: Make all soldered joints before connecting to the pressure relief valve.

10.6Condensate Drain (see section 7.7)

1.Connect the condensate drain to the trap outlet pipe.

Discharge Pipe

Ensure the discharge of condensate complies with any national or local regulations in force (see British Gas “Guidance Notes for the Installation of Domestic Gas Condensing Boilers”.

2.The connection will accept 21.5mm (3/4in) plastic overflow pipe which should generally discharge internally into the household drainage system. If this is not possible, discharge into an outside drain is acceptable.

32© Baxi Heating UK Ltd 2012

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Contents Installation & Service Instructions Natural Gas Benchmark SchemeInstaller Notification Guidelines Scheme Members onlyCodes of Practice refer to the most recent version Important Installation, Commissioning, Service & RepairLegislation Safe Manual Handling GeneralPreparation TechniqueContents Description Contents of PackIntroduction General Layout LayoutExpansion Vessel Automatic Air Vent Circulation Pump Drain Off PointCentral Heating Mode Fig Domestic Hot Water Mode FigFrost Protection Mode Appliance OperationTechnical Data Gold Combi 24, 28 & 33 HE aDimensions and Fixings System Details InformationCentral Heating Circuit BypassExpansion Vessel Central Heating only Safety Pressure Relief Valve FigSystem Filling and Pressurising Fig Hard Water Areas Domestic Hot Water Circuit FigShowers Site Requirements LocationClearances Figs At leastSite Requirement Ventilation of CompartmentsGas Supply Electrical SupplyPer Pipe run Minimum FallPer Metre Run500mm min Minimum Fall50mm per Run Minimum fallPlume Displacement Kit FlueBelow windows or openings on pitched roofs 2000 Likely flue positions requiring a flue terminal guardFlue Options Total equivalent length = +B+C+2x90BendsTotal Equivalent Length = +B+C+1x90Bend Telescopic Flue inc. elbow Flue AccessoriesKey Accessory Size Code No Air Duct Connection Flue Duct Connection Boiler Adaptor Twin Flue Duct AdaptorTwin Flue Connection Flue Dimensions For Roof TerminalsFlue Trim Terminal Guard FigPlume Displacement Plume Displacement Kit Fig28/33 Determining Permissible LengthsExample Elbow30mm 50mmGeneral Fitting Notes Elbow 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 Safety Pressure Relief Discharge Pipe Fig Fitting The BoilerCondensate Drain see section Tighten all the connectionsFitting The Flue Wall Thickness Flue ElbowEnsure Elbow is fully engaged into Boiler Adaptor Wall Thickness Waste FlueEnsure Extension is fully engaged into Boiler Adaptor Inner Flue Support Bracket25mm Extension Cut End Terminal Block Cover Cable Clamp Making The Electrical ConnectionsPreliminary Electrical Checks Selector Switch Display CommissioningCommissioning the Boiler Screw Pump Automatic Air VentTemperature Control Selector Switch Display Temperature Control Gas Pressure Test Point Gas ValveCheck the Operational Working Gas Inlet Pressure It is necessary to set the boiler to ‘Calibration Mode’Setting the Timer Case Front Panel Facia Panel CompletionCompletion Annual Servicing Inspection Servicing13 .1 Annual Servicing Electrode Position 10 ±1Spark and Sensing Electrodes Fig Changing ComponentsIgniter Fig Fan Fig Venturi FigInjector Fig Gasket Venturi Injector Cover Gas Inlet Pipe Fan CollectorExtension Piece Burner FigInsulation Fig Central Heating Temperature Sensor NTC Fig Safety Thermostat FigDHW Temperature Sensor NTC Fig Flue/Heat Exchanger Thermostat Sensor FigAutomatic Air Vent Fig Pump Head Only FigPump Complete Fig Pressure Relief Valve Fig Pressure Gauge FigsHall Effect Sensor Fig Diverter Valve Motor Unit & Assembly Fig Plate Heat Exchanger FigSelector Switch Fig 14.22 P.C.B. FigGas Valve Fig Expansion Vessel FigSetting the Gas Valve Setting the Gas Valve CO2 checkFlue Adaptor Test Point Plug Analyser Probe CO2 should be 8.4% ± Reduce CO2Illustrated Wiring Diagram ElectricalShort Parts List Short Parts List426 315316 311 404419 422 400 415Error Codes Fault FindingInitial Fault Finding Checks Error 133 flashing Go to section ‘A’ Turn the selector switch toReset position for 5 seconds Pump runsError 133 flashing Go to section ‘I’ Turn Domestic Hot WaterOpen DHW tap fully Close DHW tapPCB 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 sensor Replace safety thermostatReplace PCB Is there 230V at Pages for Notes Pages for Notes GAS Boiler System Commissioning Checklist Service Record Potterton