Pressure Gauge Figs, Hall Effect Sensor Fig | Potthof & Co 28kw

Gauge Retaining

Bracket

Pressure Gauge

Fig. 94

Fig. 95

Pressure Gauge

Capillary

Hall Effect

Sensor

Hydraulic Inlet

Assembly

Fig. 96

‘O’ ring seal

Grub Screw

Pressure Relief Valve

Fig. 97

Discharge Pipe

14.0Changing Components

14.17Pressure Gauge (Figs. 94 & 95)

1.Drain the boiler primary circuit and undo the nut on the pressure gauge capillary.

2.Undo the screws securing the gauge retaining bracket.

3.Remove the bracket and gauge assembly. Depress the barbs on the side of the gauge and remove the retaining bracket.

4.Examine the sealing washer, replace if necessary.

5.Reassemble in reverse order.

14.18Hall Effect Sensor (Fig. 96)

1.Ease the sensor upwards off the hydraulic inlet manifold assembly.

2.Disconnect the electrical plug from the sensor.

3.Connect the plug to the new sensor. Carefully fit the new sensor to the hydraulic assembly, ensuring it is fully down.

14.19Pressure Relief Valve (Fig. 97)

1.Drain the boiler primary circuit.

2.Disconnect the discharge pipe from the valve. Using a suitable hexagon key undo the grub screw sufficiently to release the valve.

3.Note the orientation of the valve, rotate it and withdraw it from the manifold.

4.Fit the new valve and ‘O’ ring seal and set to the previously noted orientation. Reassemble in reverse order.

© Baxi Heating UK Ltd 2012

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Image 47

Potthof & Co 28kw, 24kw, 33kw manual Pressure Gauge Figs, Hall Effect Sensor Fig, Pressure Relief Valve Fig

Contents

Installation & Service Instructions Benchmark Scheme Natural Gas Scheme Members only Installer Notification Guidelines Codes of Practice refer to the most recent version Important Installation, Commissioning, Service & RepairLegislation Technique Safe Manual HandlingGeneral Preparation Contents Description Contents of PackIntroduction Circulation Pump Drain Off Point General LayoutLayout Expansion Vessel Automatic Air Vent Appliance Operation Central Heating Mode FigDomestic Hot Water Mode Fig Frost Protection Mode Gold Combi 24, 28 & 33 HE a Technical Data Dimensions and Fixings Bypass System DetailsInformation Central Heating Circuit Expansion Vessel Central Heating only Safety Pressure Relief Valve FigSystem Filling and Pressurising Fig Hard Water Areas Domestic Hot Water Circuit FigShowers At least Site RequirementsLocation Clearances Figs Electrical Supply Site RequirementVentilation of Compartments Gas Supply Run PerPipe run Minimum Fall Per Metre 500mm min Minimum Fall50mm per Minimum fall Run Likely flue positions requiring a flue terminal guard Plume Displacement KitFlue Below windows or openings on pitched roofs 2000 Total equivalent length = +B+C+2x90Bends Flue Options Total 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 Terminal Guard Fig Flue DimensionsFor Roof Terminals Flue Trim Plume Displacement Kit Fig Plume Displacement Elbow 28/33Determining Permissible Lengths Example 30mm 50mmGeneral Fitting Notes Extension and outlet. Secure using two of the screws Elbow to allow the flue to be installed as shown60Ø extension piece. It must be secured using two Using a suitable bit e.g mm, drill through After considering the site requirements InstallationUnpacking & Initial Preparation Flushing Fitting the Filling Loop Kit Tighten all the connections Fitting the Safety Pressure Relief Discharge Pipe FigFitting The Boiler Condensate Drain see section Wall Thickness Waste Flue Fitting The FlueWall Thickness Flue Elbow Ensure Elbow is fully engaged into Boiler Adaptor Ensure 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 Screw Pump Automatic Air Vent Selector Switch DisplayCommissioning Commissioning the Boiler It is necessary to set the boiler to ‘Calibration Mode’ Temperature Control Selector Switch DisplayTemperature Control Gas Pressure Test Point Gas Valve Check the Operational Working Gas Inlet Pressure Setting the Timer Case Front Panel Facia Panel CompletionCompletion Annual Servicing Inspection Servicing13 .1 Annual Servicing 10 ±1 Electrode Position Spark and Sensing Electrodes Fig Changing ComponentsIgniter Fig Gasket Venturi Injector Cover Gas Inlet Pipe Fan Collector Fan FigVenturi Fig Injector Fig Extension Piece Burner FigInsulation Fig Flue/Heat Exchanger Thermostat Sensor Fig Central Heating Temperature Sensor NTC FigSafety Thermostat Fig DHW Temperature Sensor NTC Fig Automatic Air Vent Fig Pump Head Only FigPump Complete Fig Pressure Relief Valve Fig Pressure Gauge FigsHall Effect Sensor Fig Plate Heat Exchanger Fig Diverter Valve Motor Unit & Assembly Fig 14.22 P.C.B. Fig Selector Switch Fig Expansion Vessel Fig Gas Valve Fig CO2 should be 8.4% ± Reduce CO2 Setting the Gas ValveSetting the Gas Valve CO2 check Flue Adaptor Test Point Plug Analyser Probe Electrical Illustrated Wiring Diagram 315316 311 404419 422 400 415 Short Parts ListShort Parts List 426 Error Codes Fault FindingInitial Fault Finding Checks Pump runs Error 133 flashingGo to section ‘A’ Turn the selector switch to Reset position for 5 seconds Close DHW tap Error 133 flashing Go to section ‘I’Turn Domestic Hot Water Open DHW tap fully Replace water PCB X3 connector terminals 3Switch terminal Fan jammed or faulty winding Replace PCB Replace gas valve Check wiring Viewing WindowReplace sensor or PCB E28 Gas at burner Replace sensor Replace safety thermostatReplace PCB Is there 230V at Pages for Notes Pages for Notes GAS Boiler System Commissioning Checklist Service Record Potterton