Potthof & Co 33kw, 24kw, 28kw manual Check the Operational Working Gas Inlet Pressure

Page 37

x 2

Central Heating

 

Domestic Hot Water

 

 

 

Temperature Control

Fig. 66

Temperature Control

 

 

 

Selector Switch

Display

 

 

 

 

 

 

 

 

 

 

 

 

2

1

12

 

 

 

 

 

 

3

 

11

 

 

 

 

 

 

4

 

 

10

Reset

 

 

 

2

5

 

 

9

 

 

 

 

PM

 

 

 

 

 

 

 

3

 

 

8

 

 

 

 

7

 

 

7

 

 

 

 

 

8

 

 

AM

 

 

 

0

4

9

 

0

5

 

 

 

 

bar

10

 

 

4

 

 

 

 

 

11

1

3

 

 

 

 

 

 

12

2

 

 

Central Heating

Domestic Hot Water

 

 

 

 

Temperature Control

Temperature Control

 

 

 

 

Gas Pressure

Test Point

Fig. 66a

Gas Valve

Fig. 67

Fig. 68

 

Fig. 69

Fig. 70

Fig. 71

 

11.0Commissioning

11.2Check the Operational (Working) Gas Inlet Pressure

1.Ensure that all controls are calling for heat, and the selector

switch is in the central heating and hot water position (). The current boiler temperature is shown on the display.

2.It is necessary to set the boiler to ‘Calibration Mode’.

3.Turn both temperature control knobs fully anticlockwise, then quickly turn the DHW temperature knob 1/4 clockwise twice and back fully anticlockwise (Fig. 66).

4.The display will now alternate between ‘SF’ and the current boiler temperature and both green LEDs will flash (Figs. 67 & 68).

5.Turn CH temperature control knob fully clockwise. As the knob is turned the display will change from ‘0’ to ‘00’ (Fig. 69) indicating maximum rate, then revert to ‘P’ alternating with the current boiler temperature (Figs 70 & 71).

6.With the boiler operating in the maximum rate condition check that the operational (working) gas pressure at the inlet gas pressure test point (Fig. 66a) is in accordance with B.S.

6798 & B.S. 6891.

7.Ensure that this inlet pressure can be obtained with all other gas appliances in the property working.

Measure the Gas Rate

8.With any other appliances & pilot lights turned OFF the gas rate can be measured. It should be between:-

24 model

2.6m3/h

28 model

3.1m3/h

33 model

3.6 m3/h

9.The ‘Calibration Function’ is active for 20 minutes unless the maximum CH temperature is exceeded.

10.The function can be disabled at any time by turning the DHW temperature knob.

11.Carefully read and complete all sections of the Benchmark Commissioning Checklist at the rear of this publication that are relevant to the boiler and installation. These details will be required in the event of any warranty work. The publication must be handed to the user for safe keeping and each subsequent regular service visit recorded.

12.For IE, it is necessary to complete a “Declaration of Conformity” to indicate compliance with I.S. 813. An example of this is given in I.S. 813 “Domestic Gas Installations”. This is in addition to the Benchmark Commissioning Checklist.

© Baxi Heating UK Ltd 2012

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Contents Installation & Service Instructions Benchmark Scheme Natural GasScheme Members only Installer Notification GuidelinesLegislation Important Installation, Commissioning, Service & RepairCodes of Practice refer to the most recent version General Safe Manual HandlingPreparation TechniqueContents Introduction Contents of PackDescription Layout General LayoutExpansion Vessel Automatic Air Vent Circulation Pump Drain Off PointDomestic Hot Water Mode Fig Central Heating Mode FigFrost Protection Mode Appliance OperationGold Combi 24, 28 & 33 HE a Technical DataDimensions and Fixings Information System DetailsCentral Heating Circuit BypassSystem Filling and Pressurising Fig Safety Pressure Relief Valve FigExpansion Vessel Central Heating only Showers Domestic Hot Water Circuit FigHard Water Areas Location Site RequirementsClearances Figs At leastVentilation of Compartments Site RequirementGas Supply Electrical SupplyPipe run Minimum Fall PerPer Metre Run50mm per Minimum Fall500mm min Minimum fall RunFlue Plume Displacement KitBelow windows or openings on pitched roofs 2000 Likely flue positions requiring a flue terminal guardTotal equivalent length = +B+C+2x90Bends Flue OptionsTotal Equivalent Length = +B+C+1x90Bend Key Accessory Size Code No Flue AccessoriesTelescopic Flue inc. elbow Twin Flue Connection Twin Flue Duct AdaptorAir Duct Connection Flue Duct Connection Boiler Adaptor For Roof Terminals Flue DimensionsFlue Trim Terminal Guard FigPlume Displacement Kit Fig Plume DisplacementDetermining Permissible Lengths 28/33Example ElbowGeneral Fitting Notes 50mm30mm 60Ø extension piece. It must be secured using two Elbow to allow the flue to be installed as shownUsing a suitable bit e.g mm, drill through Extension and outlet. Secure using two of the screwsUnpacking & Initial Preparation InstallationFlushing After considering the site requirementsFitting the Filling Loop Kit Fitting The Boiler Fitting the Safety Pressure Relief Discharge Pipe FigCondensate Drain see section Tighten all the connectionsWall Thickness Flue Elbow Fitting The FlueEnsure 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 Preliminary Electrical Checks Making The Electrical ConnectionsTerminal Block Cover Cable Clamp Commissioning Selector Switch DisplayCommissioning the Boiler Screw Pump Automatic Air VentTemperature Control Gas Pressure Test Point Gas Valve Temperature Control Selector Switch DisplayCheck the Operational Working Gas Inlet Pressure It is necessary to set the boiler to ‘Calibration Mode’Setting the Timer Completion CompletionCase Front Panel Facia Panel 13 .1 Annual Servicing ServicingAnnual Servicing Inspection 10 ±1 Electrode PositionIgniter Fig Changing ComponentsSpark and Sensing Electrodes Fig Venturi Fig Fan FigInjector Fig Gasket Venturi Injector Cover Gas Inlet Pipe Fan CollectorInsulation Fig Burner FigExtension Piece Safety Thermostat Fig Central Heating Temperature Sensor NTC FigDHW Temperature Sensor NTC Fig Flue/Heat Exchanger Thermostat Sensor FigPump Complete Fig Pump Head Only FigAutomatic Air Vent Fig Hall Effect Sensor Fig Pressure Gauge FigsPressure Relief Valve Fig Plate Heat Exchanger Fig Diverter Valve Motor Unit & Assembly Fig14.22 P.C.B. Fig Selector Switch FigExpansion Vessel Fig Gas Valve FigSetting the Gas Valve CO2 check Setting the Gas ValveFlue Adaptor Test Point Plug Analyser Probe CO2 should be 8.4% ± Reduce CO2Electrical Illustrated Wiring DiagramShort Parts List Short Parts List426 315316 311 404419 422 400 415Initial Fault Finding Checks Fault FindingError Codes Go to section ‘A’ Turn the selector switch to Error 133 flashingReset position for 5 seconds Pump runsTurn Domestic Hot Water Error 133 flashing Go to section ‘I’Open DHW tap fully Close DHW tapSwitch terminal PCB X3 connector terminals 3Fan jammed or faulty winding Replace PCB Replace waterReplace sensor or PCB E28 Check wiring Viewing WindowGas at burner Replace gas valveReplace PCB Is there 230V at Replace safety thermostatReplace sensor Pages for Notes Pages for Notes GAS Boiler System Commissioning Checklist Service Record Potterton
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