Baxi Potterton Gold HE A Range manual Appliance Operation, Frost Protection Mode, Pump Protection

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Central Heating Circuit

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1

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34

 

3.0

Appliance Operation

 

 

 

 

 

 

 

 

3.1

Central Heating Mode (Fig. 2)

1. With a demand for heating, the pump circulates water

through the primary circuit.

2. Once main burner ignites the fan speed controls the gas

rate to maintain the heating temperature measured by the

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temperature sensor.

3. When the flow temperature exceeds the setting

temperature, a 3 minute delay occurs before the burner

relights automatically (anti-cycling). The pump continues to

run during this period.

4. When the demand is satisfied the burner is extinguished

and the pump continues to run for a period of 3 minutes

(Pump Overrun).

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3.2

Domestic Hot Water Mode (Fig. 3)

1. Priority is given to the domestic hot water supply. A

 

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13

 

 

12

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Fig. 2

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Key

 

 

 

 

 

 

 

 

 

1

Primary Heat Exchanger

 

 

15 Domestic Hot Water Outlet

2

Burner

 

 

 

 

16

Heating Flow

 

 

3

Ignition Electrodes

 

 

 

 

 

 

17

Pressure Gauge

 

 

4

Flame Sensing Electrode

 

 

 

 

 

 

18

Water Pressure Sensor

 

 

5

Gas Valve

 

 

 

 

 

 

19 Automatic By-Pass

 

 

6

Pump

 

 

 

 

 

 

20

Fan

 

 

7

Automatic Air Vent

 

 

 

 

 

 

21

Diverter Valve Assembly

 

 

8

Plate Heat Exchanger

 

 

 

 

 

 

22

Diverter Valve Motor

 

 

9

Flow Sensor with Filter & Regulator

 

 

 

 

23 Domestic Hot Water Flow Temperature Sensor

10

Pressure Relief Valve

 

 

 

 

24

Safety Thermostat

 

 

11

Boiler Drain Point

 

 

 

 

 

 

25 Central Heating Temperature Sensor

12

Heating Return

 

 

 

 

26

Expansion Vessel

 

 

13 Cold Water Inlet On/Off Valve and Filter

 

 

27 Heat Exchanger Air Vent

 

 

14

Gas Inlet

 

 

 

 

 

 

 

 

 

 

 

 

 

demand at a tap or shower will override any central heating

requirement.

2. The flow of water will operate the Hall Effect Sensor

which requests the 3 way valve to change position. This will

allow the pump to circulate the primary water through the

DHW plate heat exchanger.

3. The burner will light automatically and the temperature of

the domestic hot water is controlled by the temperature

sensor.

4. When the domestic hot water demand ceases the burner

will extinguish and the diverter valve will remain in the

domestic hot water mode, unless there is a demand for

central heating.

Domestic Hot Water Circuit

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IMPORTANT: When the selector switch is in the ‘0’ (Off) position the electrical supply to the boiler is isolated. The boiler will not operate and the integral timer will require resetting once the selector switch is set to either Position (i) or Position (ii).

3.3

Frost Protection Mode

1. The frost protection mode is integral to the appliance and

functions only with the selector switch (see Section 2.1) in

the domestic hot water and central heating position. If the

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system temperature falls below 5° C then the boiler will fire

on its minimum setting until a flow temperature of 30° C is

reached.

 

3.4

Pump Protection

1.With the selector switch (see Section 2.1) in either the central heating or central heating and domestic hot water position, the pump will automatically operate for 1 minute in every 24 hours to prevent sticking.

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Fig. 3

© Baxi Heating UK Ltd 2008

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Contents Installation & Service Instructions BS-EN ISO 9001 Accredited Company Natural GasScheme Members only Installer Notification GuidelinesImportant Installation, Commissioning, Service & Repair LegislationCodes of Practice refer to the most recent version General Safe Manual HandlingPreparation TechniqueContents Contents of Pack IntroductionDescription Layout General LayoutFrost Protection Mode Appliance OperationPump Protection Gold Combi 24, 28 & 33 HE a Technical DataOrientation Dimensions and FixingsFlue Ø 100mm Tap Rail 32.5 mm Condensate Drain 65 mm 22mm 15mmInformation System DetailsCentral Heating Circuit BypassSystem Filling and Pressurising Fig Expansion Vessel Central Heating onlyPressure Relief Valve Fig Domestic Hot Water Circuit Fig ShowersHard Water Areas Site Requirements LocationClearances Figs Ventilation of Compartments Site RequirementGas Supply Electrical SupplyCondensate Drain Flue terminal guard FlueHorizontal Flues Flue OptionsHorizontal Flue Systems This bend is equivalent to 1 metreTwin & Vertical Flue Systems Vertical Flues Twin PipeMetre for each 91.5 bend Metre for each 135 bend This bend is equivalent to 1 metreFlue Accessories Key Accessory Size Code No5111079 Flue Duct Adaptor Air duct adaptorFor Twin Flue Systems fit the adaptors as follows For Roof Terminals Flue DimensionsFlue Trim Flue Deflector FigPlume Displacement Plume Displacement Kit FigMetres Ring Adaptor 28/33 Additional Accessories Elbow 5121369 Elbow Pair 5121370Determining Permissible Lengths ExampleGeneral Fitting Notes Shown in . Complete the installation of the 60Ø30mm Exhaust, securing in the bracketsPlume Outlet Elbow Installation Unpacking & Initial PreparationFlushing Fitting the Filling Loop Loop and valves must be connected as shown in the diagram aDouble Check Valve Stop Valve Temporary Filling Loop Hose Fitting Cold Inlet Stop ValveFitting the Pressure Relief Discharge Pipe Fig Fitting The BoilerCondensate Drain see section Tighten all the connectionsWall Thickness Waste Fitting The FlueFlue Elbow Ensure Elbow is fully Engaged into BoilerInner Flue Support Bracket Ensure Flue is fully Engaged into Flue ElbowEnsure Extension is Fully engaged into Boiler Adaptor Preliminary Electrical Checks Making The Electrical ConnectionsTerminal Block Cover Cable ClampCommissioning Selector Switch DisplayCommissioning the Boiler Heat Exchanger Automatic Air Vent Screw PumpChecking Temperature ControlSetting the Timer Completion CompletionCase Front Panel Facia Panel 13 .1 Annual Servicing ServicingAnnual Servicing BurnerViewing Window Changing Components Igniter FigSpark and Sensing Electrodes Fig Venturi Fig Fan FigInjector Fig Gasket Venturi Injector Cover Gas Inlet Pipe Fan CollectorBurner Fig Insulation FigExtension Piece Safety Thermostat Fig Central Heating Temperature Sensor NTC FigDHW Temperature Sensor NTC Fig Flue/Heat Exchanger Thermostat Sensor FigPump Head Only Fig Heat Exchanger Automatic Air Vent FigPump Complete Fig Automatic Air Vent FigHall Effect Sensor Fig Pressure Gauge FigsPlate Heat Exchanger Fig Diverter Valve Motor Unit & Assembly Figs14.20 P.C.B. Fig Selector Switch FigCompletely undo the screws securing the control box Pin FigGas Valve Fig Expansion Vessel FigVenturi Inlet Pipe Temperature Control Selector Switch Display Combustion CheckChecking the CO2 Electrical Illustrated Wiring DiagramShort Parts List Short Parts ListKey Description Manufacturers Fault Finding Initial Fault Finding ChecksError Codes Reset position for 5 seconds Error 133 flashingDisplay illuminates Pump runsDomestic Hot Water Follow operational sequence Error 110 flashingTurn Domestic Hot Water Open DHW tap fullySwitch terminal PCB X3 connector terminals 3Fan jammed or faulty winding Replace PCB Is there 230V at Main terminals L and N Main terminal fuseReplace gas valve Gas at burnerTerminals 1 Ensure that the Hall Effect Sensor is in positionReplace safety thermostat Replace PCB Is there 230V atReplace heat exchanger GAS Boiler Commissioning Checklist Service Interval Record UK Comp No 5116282 Iss 7 4/08 Brooks House, Coventry Road, Warwick. CV34 4LL
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