Baxi Potterton 47-393-42, 47-393-40, 47-393-39, 47-393-41 manual Fan Fig, Venturi Fig, Injector Fig

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Fig. 79

Burner

Gasket

Venturi

Injector

Cover

Gas Inlet Pipe

Gas Inlet

Fan

Venturi

Injector

Collector

Fig. 78

Fig. 80

When fitting the venturi ensure that the arrow is pointing forward

14.0Changing Components

14.3Fan (Fig. 79)

1.Undo the nut on the gas inlet pipe to the venturi (Fig. 79) and pull the sensing pipe off the fan.

2.Disconnect the electrode leads, noting their position and disconnect the fan electrical plugs.

3.Undo the screws securing the collector to the cover (33 models) or extension piece (24 & 28 models).

4.Remove the collector and fan assembly, being careful to retain the injector in the venturi.

5.Undo the screws securing the fan to the venturi and fit the new fan, replacing the seal if necessary.

6.Examine the burner gasket and replace if necessary.

7.Reassemble in reverse order, ensuring that the injector is in place and the sensing pipe is connected to the fan.

14.4Venturi (Fig. 78)

1.Remove the collector and fan assembly as described in section 14.3.

2.Extract the injector from the venturi.

3.Undo the screws securing the fan to the venturi and the venturi to the collector.

Important: When fitting the new venturi, ensure the arrows on it’s base point into the collector (Fig. 84).

4.Examine the seals and burner gasket, replace if necessary.

5.Reassemble in reverse order, ensuring that the injector is in place.

14.5Injector (Fig. 78)

1.Remove the collector and fan assembly as described in section 14.3.

2.Extract and replace the injector and reassemble in reverse order.

© Baxi Heating UK Ltd 2012

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Contents
Installation & Service Instructions Potterton Titanium Natural GasScheme Members only Installer Notification GuidelinesLegislation Important Installation, Commissioning, Service & RepairCodes of Practice refer to the most recent version Technique Safe Manual HandlingGeneral PreparationContents Introduction Contents of PackDescription Expansion Vessel Automatic Air Vent Domestic Hot Water Mode Light DisplayGeneral Layout LayoutAppliance Operation Central Heating Mode FigDomestic Hot Water Mode Fig Frost Protection ModeTitanium 24, 28, 33 Technical Data22mm 15mm Dimensions and FixingsOrientation Tap Rail 32.5 mm Condensate Drain 65 mmBypass System DetailsInformation Central Heating CircuitExpansion Vessel Central Heating only System Filling and Pressurising FigPressure Relief Valve Fig Showers Domestic Hot Water Circuit FigHard Water Areas Location Site RequirementsAt Least 1.5 7.2 Clearances Figs Electrical Supply Site RequirementVentilation of Compartments Gas SupplyCondensate Drain 500mm min 50mm perInsulation RunMinimum fall Boiler External runs & thoseFlue Horizontal Flues Each fitting to aid assemblyFlue Options Horizontal Flue SystemsApart Vertical FluesTwin & Vertical Flue Systems 120mm MinKey Accessory Size Code No Flue AccessoriesTelescopic Internal Flue Kit Twin Flue Connection Twin Flue Duct AdaptorAir Duct Connection Flue Duct Connection Boiler Adaptor Terminal Guard Fig Flue DimensionsFor Roof Terminals Flue TrimRing Bracket Plume DisplacementPlume Displacement Kit Fig Elbow/Plume Outlet AssemblyExample Flue Lengths OK 28/33/40Determining Permissible Lengths Example30mm General Fitting NotesExtension 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 throughAfter considering the site requirements InstallationUnpacking & Initial Preparation FlushingFitting the Filling Loop Kit Fitting the Pressure Relief Discharge Pipe Fig Fitting The BoilerCondensate Drain see section Wall Thickness Waste Flue Fitting The FlueWall Thickness Flue Elbow Ensure Elbow is fully engaged into Boiler Adaptor25mm Extension Cut End Inner Flue Support BracketEnsure Extension is fully engaged into Boiler Adaptor Preliminary Electrical Checks Making The Electrical ConnectionsScrew Pump Automatic Air Vent Selector Switch DisplayCommissioning Commissioning the BoilerPressure Setting the Timer Completion Completion Case Front Panel Facia Panel 13 .1 Annual Servicing ServicingAnnual Servicing Inspection Burner Sensing Electrode 10 ±1Viewing Window Igniter Fig Changing ComponentsSpark and Sensing Electrodes Fig Gasket Venturi Injector Cover Gas Inlet Pipe Fan Collector Fan FigVenturi Fig Injector FigInsulation Fig Burner FigBurner Gasket Extension Piece Flue/Heat Exchanger Thermostat Sensor Fig Central Heating Temperature Sensor NTC FigSafety Thermostat Fig DHW Temperature Sensor NTC FigPump Complete Fig Pump Head Only FigAutomatic Air Vent Fig Hall Effect Sensor Fig Pressure Gauge FigsPlate Heat Exchanger Fig Diverter Valve Motor Unit & Assembly Fig14.22 P.C.B. Fig Selector Switch FigGas Valve Fig Throttle Adjustment ScrewExpansion Vessel Fig Throttle Setting the Gas ValveSetting the Gas Valve CO2 check Flue Adaptor Test Point Plug Analyser ProbeElectrical Illustrated Wiring Diagram302 Short Parts ListShort Parts List 306Initial Fault Finding Checks Fault FindingError Codes Pump runs Error 133 flashingGo to section ‘A’ Turn the selector switch to Reset position for 5 secondsOpen DHW tap fully Turn selector switch toError 133 flashing Go to section ‘I’ Turn Domestic Hot WaterReplace water PCB X3 connector terminals 3Switch terminal Fan jammed or faulty winding Replace PCBReplace gas valve Check wiring Viewing WindowReplace sensor or PCB E28 Gas at burnerReplace PCB Is there 230V at Replace safety thermostatReplace sensor Page Page GAS Boiler System Commissioning Checklist Service Record Potterton
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