14.22 P.C.B. Fig, Selector Switch Fig | Potthof & Co 33kw, 24kw

Control Box Cover

Fig. 101

P.C.B.

Selector

Switch

Facia

Selector Switch Knob

Fig. 102

14.0Changing Components

14.22P.C.B. (Fig. 102)

1. Note the settings of the temperature control knobs, rotate them fully anticlockwise and carefully pull them off the drive pins.

2. Completely undo the screws securing the control box cover and release the cover retaining barbs from their slots. Disengage the rear of the cover from the control box hinge pin (Fig. 101).

3. Note the position of all plugs and wires on the P.C.B. and disconnect them.

	4.	Undo the securing screws and remove the P.C.B. Transfer
	the control knob drive pins to the new P.C.B. and turn them
	fully anticlockwise.
	5.	Reassemble in reverse order, ensuring that the
	temperature controllers are reset to their previous positions.
	14.23 Selector Switch (Fig. 102)
	1.	Note the setting of the selector switch knob and carefully
	pull it off the facia.
Drive Pins	2. Completely undo the screws securing the control box
	cover and release the cover retaining barbs from their slots.
	Disengage the rear of the cover from the control box hinge
	pin (Fig. 101).
	3.	Note the position of the electrical connections and the
	orientation of the switch. Remove the electrical connections.
	4.	Remove the screws securing the switch to the facia panel.
	5.	Fit the new switch, ensuring that it is correctly positioned
	and reassemble in reverse order.
Temperature Control	Knobs

© Baxi Heating UK Ltd 2012

49

Image 49

Potthof & Co 33kw, 24kw, 28kw manual 14.22 P.C.B. Fig, Selector Switch Fig

Contents

Installation & Service Instructions Benchmark Scheme Natural Gas Scheme Members only Installer Notification Guidelines Legislation Important Installation, Commissioning, Service & RepairCodes of Practice refer to the most recent version General Safe Manual HandlingPreparation Technique Contents Introduction Contents of PackDescription Layout General LayoutExpansion Vessel Automatic Air Vent Circulation Pump Drain Off Point Domestic Hot Water Mode Fig Central Heating Mode FigFrost Protection Mode Appliance Operation Gold Combi 24, 28 & 33 HE a Technical Data Dimensions and Fixings Information System DetailsCentral Heating Circuit Bypass System 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 least Ventilation of Compartments Site RequirementGas Supply Electrical Supply Pipe run Minimum Fall PerPer Metre Run 50mm per Minimum Fall500mm min Minimum fall Run Flue Plume Displacement KitBelow windows or openings on pitched roofs 2000 Likely flue positions requiring a flue terminal guard Total equivalent length = +B+C+2x90Bends Flue Options Total 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 Fig Plume Displacement Kit Fig Plume Displacement Determining Permissible Lengths 28/33Example Elbow General 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 screws Unpacking & Initial Preparation InstallationFlushing After considering the site requirements Fitting the Filling Loop Kit Fitting The Boiler Fitting the Safety Pressure Relief Discharge Pipe FigCondensate Drain see section Tighten all the connections Wall Thickness Flue Elbow Fitting The FlueEnsure Elbow is fully engaged into Boiler Adaptor Wall Thickness Waste Flue 25mm 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 Vent Temperature 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 Position Igniter Fig Changing ComponentsSpark and Sensing Electrodes Fig Venturi Fig Fan FigInjector Fig Gasket Venturi Injector Cover Gas Inlet Pipe Fan Collector Insulation Fig Burner FigExtension Piece Safety Thermostat Fig Central Heating Temperature Sensor NTC FigDHW Temperature Sensor NTC Fig Flue/Heat Exchanger Thermostat Sensor Fig Pump 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 Fig 14.22 P.C.B. Fig Selector Switch Fig Expansion Vessel Fig Gas Valve Fig Setting the Gas Valve CO2 check Setting the Gas ValveFlue Adaptor Test Point Plug Analyser Probe CO2 should be 8.4% ± Reduce CO2 Electrical Illustrated Wiring Diagram Short Parts List Short Parts List426 315316 311 404419 422 400 415 Initial Fault Finding Checks Fault FindingError Codes Go to section ‘A’ Turn the selector switch to Error 133 flashingReset position for 5 seconds Pump runs Turn Domestic Hot Water Error 133 flashing Go to section ‘I’Open DHW tap fully Close DHW tap Switch terminal PCB X3 connector terminals 3Fan jammed or faulty winding Replace PCB Replace water Replace sensor or PCB E28 Check wiring Viewing WindowGas at burner Replace gas valve Replace PCB Is there 230V at Replace safety thermostatReplace sensor Pages for Notes Pages for Notes GAS Boiler System Commissioning Checklist Service Record Potterton