Manuals / Baxi Potterton / Household Appliance / Boiler

Baxi Potterton 30 HE Domestic Hot Water Follow operational sequence, Pump runs, Neons flashing

Models: 30 HE

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Page 49

Domestic Hot Water - Follow operational sequence

16.0Fault Finding

Turn selector to neon illuminated

YES

Turn thermostat to max.

Open DHW tap fully. DHW

flow switch operated

YES

Primary water is diverted from CH system to DHW heat exchanger and flow microswitch operated neon illuminated

YES

Pump runs

YES

Primary flow switch operated

YES

Fan runs at max speed

YES

NO

NO

NO

NO

NO

NO

	Go to section ‘A’


	Is mains water			YES
	filter and differential			YES


	assembly clean?

	YES
	YES

	DHW flow rate more than
	2.5l/min.
				NO

	Continuity across DHW flow
	microswitch terminals and
	PCB - A5 connector			YES
	terminals 5 & 6
	terminals 5 & 6


	neon flashing
	Go to section ‘B’


	neon flashing
	Go to section ‘C’
				YES

	neon flashing
	neon flashing

			NO
			NO

		neons flashing
	Go to section ‘D’

Replace diaphragm

YES

DHW flow valve diaphragm

damaged

NO

DHW flow valve rod

obstructed

Replace DHW flow

microswitch

Replace PCB

Turn selector to reset

position. If regular resetting is

required or appliance still

does not operate

investigation is necessary

Go to sections ‘J’ & ‘M’

Air pressure switch proved

YES

Spark at ignition electrodes

for up to 10 seconds

YES

Burner on neon

illuminated

YES

Burner extinguishes

after 10 seconds

NO

Burner output modulates to maintain temperature set at thermostat

YES

Close DHW tap

YES

DHW flow valve

senses no flow.

Primary water diverted to CH system. DHW flow switch released off

YES

Burner goes out

NO

NO

NO

YES

NO

NO

NO

neon flashing

Go to section ‘E’

YES neon flashing

NO

Replace PCB

Go to section ‘F’

neon flashing

Go to sections ‘I’ & ‘L’

Reduce the DHW flow rate. If burner does not modulate clean DHW temperature sensor and DHW heat exchanger. If modulation does not occur go to section ‘G’

Diverter valve spindle

assembly faulty

YES

Fan stops

Turn the selector to the reset position. If the light does not extinguish go to section H &

K

Pump stops	YES
	Operation sequence correct

© Baxi Heating UK Ltd 2007

49

Image 49

Baxi Potterton 30 HE manual Domestic Hot Water Follow operational sequence, Turn selector to neon illuminated, Pump runs

Contents

Installation & Service Instructions Contents Scheme Members only Installer Notification GuidelinesLegislation Important Installation, Commissioning, Service & RepairCodes of Practice, most recent version should be used General Safe Manual HandlingPreparation TechniqueDescription IntroductionOptional Extras Case Front Panel Control Box Data BadgeLayout General Layout1211 30 31 32 Domestic Hot Water Mode Fig Central Heating Mode FigFrost Protection Mode Appliance OperationPerforma 30 HE Technical DataDimensions and Fixings Information System DetailsCentral Heating Circuit BypassPressure Relief Valve Fig System Filling and PressurisingShowers Domestic Hot Water Circuit FigHard Water Areas Location Site RequirementsClearances Figs Gas Supply Ventilation of CompartmentsElectrical Supply Condensate Drain External termination via internalFlue Plume Displacement KitBuilt-in element such as a window frame. See BS 5440 Pt Or DoorHorizontal Flues Flue OptionsHorizontal Flue Systems This bend is equivalent to 1 metreTwin & Vertical Flue Systems Vertical Flues Twin PipeMetre for each 91.5 elbow Metre for each 45 elbow 1m extension 45bend 25m 91.5bendKey Accessory Size Flue Accessories5111079 Air duct adaptor Flue Duct AdaptorFor Twin Flue Systems fit the adaptors as follows For Roof Terminals Flue DimensionsFlue Trim Terminal Guard FigPlume Displacement Kit b Plume DisplacementElbow/Plume Outlet Assembly Ring Bracket Metres 60Ø Exhaust Flue Pipe 60Ø SupportDetermining Permissible Lengths General Fitting Notes 30mmMin metres Flue Trim Spigot ScrewPlume Outlet Elbow Initial Preparation InstallationFlushing Preparing The BoilerCondensate Drain see section Fitting The BoilerPressure Relief Valve Discharge Pipe Wall Plate Remove the sealing caps from the boiler connectionsWall Thickness Flue Elbow Adaptor Fitting The FlueVertical Flue WasteY Flue Inner Flue Support Bracket Flue ElbowPreliminary Electrical Checks Making The Electrical ConnectionsCommissioning the Boiler Commissioning the BoilerPressure Test Point Sealing Screw Checking the Burner PressureCompletion CompletionCase Front Panel Facia Panel 13 .1 Annual Servicing Servicing the BoilerAnnual Servicing Changing Components Pressure Switch FigFan Figs Heat Exchanger Fig 14.0 Changing ComponentsBurner Fig Electrodes Fig Injectors FigInsulation Fig Reassemble in reverse orderSafety Thermostat Fig Central Heating Temperature Sensor FigDHW Temperature Sensor Fig Gas Valve FigPump Complete Fig Pump Head Only FigAutomatic Air Vent Fig Expansion Vessel Fig Pressure Gauge FigsCondensate Trap Fig 14.19 P.C.B. Fig Selector Switch FigPlate Heat Exchanger Fig Flow Regulator Figs Diverter Valve AssemblyFlue Overheat Thermostat Fig Secondary Heat Exchanger FigControl PCB Illustrated Wiring DiagramFault Finding Diverter valve spindle Assembly faulty Microswitch terminalsDomestic Hot Water Follow operational sequence Turn selector to neon illuminatedReplace pump PCB A4 connector terminals 3 Replace PCB Check wiring PCB A4 connector Replace selector Terminals 4PCB A2 connector, is Across terminals 5 Replace microswitchTurn selector switch PCB A1 connector has 230V ACTo ‘Reset’ position Gas at burnerON/OFF/RESET selector when turned to ‘Reset’ position Short Parts List Short Parts List131 154GAS Boiler Commissioning Checklist Service Interval Record Potterton