Baxi Potterton Gold HE A Range manual Domestic Hot Water Circuit Fig, Showers, Hard Water Areas

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Other Tap

Outlets

Expansion Boiler

Vessel

Check

Valve

Pressure Reducer

ValveTo Hot

Taps

Stop Tap

Fig. 7

6.0System Details

6.8Domestic Hot Water Circuit (Fig. 7)

1.All DHW circuits, connections, fittings, etc. should be fully in accordance with relevant standards and water supply regulations.

2.Your attention is drawn to:

for GB: Guidance G17 to G24 and recommendation R17 to R24 of the Water Regulations Guide.

for IE: the current edition of I.S. 813 “Domestic Gas Installations”.

3.A single check valve must be fitted as shown in Fig. 7 to prevent backflow to the supply pipe and to ensure the efficient operation of the expansion vessel which is required to accommodate the thermal expansion of the water.

4.When the domestic water system includes any device which prevents water expanding back towards the supply (check valve, loose jumpered stopcock, water meter, water treatment device) then an expansion vessel must be fitted (eg. Zilmet 160ml, R1/2 15bar).

5.If the hot water expansion is not provided for, then high pressures can develop which may result in damage to fittings and devices on the system.

6.The boiler’s maximum working mains pressure is 8 bar, therefore all pipework, connections, fittings, etc. should be suitable for pressures in excess of 8 bar. A pressure reducing valve must be fitted for pressures in excess of 8 bar. The manufacturer of any outlet fittings, such as a shower valve, may require a lower maximum pressure. The pressure reduction must take account of all fittings connected to the DHW system.

6.9Showers

1.If a shower control is supplied from the appliance it should be of the thermostatic or pressure balanced type. Thermostatic type shower valves provide the best comfort and guard against water at too high a temperature. Existing controls may not be suitable - refer to the shower valve manufacturer.

6.10Hard Water Areas

1.If the area of the installation is recognised as a HARD WATER AREA then a suitable device should be fitted to treat the mains water supply to the boiler. Contact your Water Distribution Company for advice on suitable devices.

14© Baxi Heating UK Ltd 2008

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Contents Installation & Service Instructions Natural Gas BS-EN ISO 9001 Accredited CompanyInstaller Notification Guidelines Scheme Members onlyCodes of Practice refer to the most recent version Important Installation, Commissioning, Service & RepairLegislation Preparation Safe Manual HandlingGeneral TechniqueContents Description Contents of PackIntroduction General Layout LayoutPump Protection Frost Protection ModeAppliance Operation Technical Data Gold Combi 24, 28 & 33 HE aFlue Ø 100mm Tap Rail 32.5 mm Condensate Drain 65 mm Dimensions and FixingsOrientation 22mm 15mmCentral Heating Circuit System DetailsInformation BypassPressure Relief Valve Fig System Filling and Pressurising FigExpansion Vessel Central Heating only Hard Water Areas Domestic Hot Water Circuit FigShowers Clearances Figs Site RequirementsLocation Gas Supply Site RequirementVentilation of Compartments Electrical SupplyCondensate Drain Flue Flue terminal guardHorizontal Flue Systems Flue OptionsHorizontal Flues This bend is equivalent to 1 metreMetre for each 91.5 bend Vertical Flues Twin PipeTwin & Vertical Flue Systems Metre for each 135 bend This bend is equivalent to 1 metre5111079 Flue AccessoriesKey Accessory Size Code No For Twin Flue Systems fit the adaptors as follows Flue Duct AdaptorAir duct adaptor Flue Trim Flue DimensionsFor Roof Terminals Flue Deflector FigMetres Ring Adaptor Plume DisplacementPlume Displacement Kit Fig Determining Permissible Lengths Additional Accessories Elbow 5121369 Elbow Pair 512137028/33 Example30mm Shown in . Complete the installation of the 60ØGeneral Fitting Notes Exhaust, securing in the bracketsPlume Outlet Elbow Flushing InstallationUnpacking & Initial Preparation Double Check Valve Stop Valve Temporary Filling Loop Loop and valves must be connected as shown in the diagram aFitting the Filling Loop Hose Fitting Cold Inlet Stop ValveCondensate Drain see section Fitting The BoilerFitting the Pressure Relief Discharge Pipe Fig Tighten all the connectionsFlue Elbow Fitting The FlueWall Thickness Waste Ensure Elbow is fully Engaged into BoilerEnsure Extension is Fully engaged into Boiler Adaptor Inner Flue Support BracketEnsure Flue is fully Engaged into Flue Elbow Terminal Block Cover Making The Electrical ConnectionsPreliminary Electrical Checks Cable ClampCommissioning the Boiler Selector Switch DisplayCommissioning Heat Exchanger Automatic Air Vent Screw PumpTemperature Control CheckingSetting the Timer Case Front Panel Facia Panel CompletionCompletion Servicing 13 .1 Annual ServicingViewing Window Annual ServicingBurner Spark and Sensing Electrodes Fig Changing ComponentsIgniter Fig Injector Fig Fan FigVenturi Fig Gasket Venturi Injector Cover Gas Inlet Pipe Fan CollectorExtension Piece Burner FigInsulation Fig DHW Temperature Sensor NTC Fig Central Heating Temperature Sensor NTC FigSafety Thermostat Fig Flue/Heat Exchanger Thermostat Sensor FigPump Complete Fig Heat Exchanger Automatic Air Vent FigPump Head Only Fig Automatic Air Vent FigPressure Gauge Figs Hall Effect Sensor FigDiverter Valve Motor Unit & Assembly Figs Plate Heat Exchanger FigCompletely undo the screws securing the control box Selector Switch Fig14.20 P.C.B. Fig Pin FigVenturi Inlet Pipe Gas Valve FigExpansion Vessel Fig Checking the CO2 Temperature Control Selector Switch DisplayCombustion Check Illustrated Wiring Diagram ElectricalKey Description Manufacturers Short Parts ListShort Parts List Error Codes Fault FindingInitial Fault Finding Checks Display illuminates Error 133 flashingReset position for 5 seconds Pump runsTurn Domestic Hot Water Error 110 flashingDomestic Hot Water Follow operational sequence Open DHW tap fullyFan jammed or faulty winding Replace PCB PCB X3 connector terminals 3Switch terminal Is there 230V at Main terminals L and N Main terminal fuseTerminals 1 Gas at burnerReplace gas valve Ensure that the Hall Effect Sensor is in positionReplace heat exchanger Replace safety thermostatReplace PCB Is there 230V at GAS Boiler Commissioning Checklist Service Interval Record Brooks House, Coventry Road, Warwick. CV34 4LL UK Comp No 5116282 Iss 7 4/08