Baxi Potterton G.C.No 47 393 22 Making The Electrical Connections, Preliminary Electrical Checks

Page 32

Terminal Block Cover

Fig. 55

Fig. 56	Cable Clamp	Facia Panel

Fused Spur

L N

Room ‘Stat

N

		bk	1
230V		bk	2
		g/y
	N	b
	N
	L	br
	L
Fig. 57
	Frost	Thermostat
Fused Spur
L N
Room ‘Stat	230V
N	230V
N
			bk	1
	230V		bk	2
			bk	2
External Clock			g/y
		N	b
		N
		L	br
		L

NOTE: The 230V switched signal for external controls (Frost Stat - Room Stat - Timer) must always be taken from terminal 2 at the boiler. Live, Neutral and Earth to power these controls must be taken from the Fused Spur.

10.0Installation

10.7Making The Electrical Connections

The boiler is fitted with a 1.3m length of 3 core cable. This can be connected to the fused 3A 230V 50HZ supply.

NOTE: Both the Live and Neutral connections are fused.

To connect an external control proceed as follows:-

1.Slacken the facia panel securing screws and lift the outercase panel so that its securing tabs are clear of the facia. Remove the panel.

2.Completely undo the screws securing the facia panel and hinge it down (Fig. 55).

3.Undo the terminal block cover securing screw and remove the cover (Fig. 55).

4.Slacken the unused cable clamp on the LH side of the boiler chassis (Fig. 56). Insert the external control wiring through the clamp and route it to the terminal block.

5.Refer to the instructions supplied with the control.

IMPORTANT: The room thermostat MUST be suitable for 230V switching.

NOTE: An external frost thermostat cannot be used with the optional integral timer.

6.Remove the link between terminals 1 & 2. The 230V supply at terminal 2 must be connected to the thermostat. The switched output from the thermostat must be connected to terminal 1 (Fig. 57). If the room thermostat being used incorporates an anticipator it MUST be wired as shown in Fig. 57.

7.Ensure that the external control input cable(s) have sufficient slack to allow the control box to drop down. Tighten the cable clamp on the boiler chassis.

8.Replace the terminal block cover, routing the external control input cable(s) through the second cut-out.

10.8Preliminary Electrical Checks

1.Prior to commissioning the boiler preliminary electrical system checks should be carried out.

2.These should be performed using a suitable meter, and include checks for Earth Continuity,

Resistance to Earth, Short Circuit and Polarity.

32© Baxi Heating UK Ltd 2011

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Contents Installation & Service Instructions 0086 Installer 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 LayoutPump Protection Frost Protection ModeAppliance Operation Technical Data Promax Combi 24, 28Dimensions and Fixings OrientationTap Rail 32.5 mm Condensate Drain 65 mmSystem Details InformationCentral Heating Circuit BypassPressure Relief Valve Fig System Filling and Pressurising FigExpansion Vessel Central Heating only Hard Water Areas Domestic Hot Water Circuit FigShowers At Least 1.5 7.2 Clearances Figs Site RequirementsLocation Site Requirement Ventilation of CompartmentsGas Supply Electrical SupplyCondensate Drain Flue Flue terminal guardEach fitting to aid assembly Flue OptionsHorizontal Flue Systems Horizontal FluesVertical Flues Twin & Vertical Flue Systems120mm Min ApartTelescopic Internal Flue Kit 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 FigMetres Ring Adaptor Plume DisplacementPlume Displacement Kit Fig 28/33 Determining Permissible LengthsExample 5121368General Fitting Notes 30mmElbow 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 requirements Fitting The Boiler Fitting the Pressure Relief Discharge Pipe Fig Condensate Drain see section Tighten all the connectionsFitting The Flue Wall Thickness WasteFlue Elbow Ensure Elbow is fully Engaged into BoilerEnsure 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 Commissioning Commissioning the BoilerPressure Case Front Panel Facia Panel CompletionCompletion Servicing 13 .1 Annual ServicingAnnual Servicing Inspection Case Front Panel Facia Panel Securing ScrewsViewing Window 10 ±1Burner Sensing Electrode Spark and Sensing Electrodes Fig Changing ComponentsIgniter Fig Fan Fig Venturi FigInjector Fig Gasket Venturi Injector Cover Gas Inlet Pipe Fan CollectorBurner Gasket Extension 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 Gauge Figs Hall Effect Sensor FigDiverter Valve Motor Unit & Assembly Fig Plate Heat Exchanger FigSelector Switch Fig 14.22 P.C.B. FigExpansion Vessel Fig Throttle Adjustment ScrewGas Valve Fig Setting the Gas Valve Setting the Gas Valve CO2 checkFlue Adaptor Test Point Plug Analyser Probe ThrottleIllustrated Wiring Diagram ElectricalShort Parts List Short Parts List306 302Error Codes Fault FindingInitial Fault Finding Checks Error 133 flashing Go to section ‘A’ Turn the selector switch toReset position for 5 seconds Pump runsTurn selector switch to Error 133 flashing Go to section ‘I’Turn Domestic Hot Water Open DHW tap fullyPCB 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 Page Page Condensing Boilers only Service Record Brooks House, Coventry Road, Warwick. CV34 4LL