Potthof & Co 33kw, 24kw, 28kw manual Fitting the Filling Loop Kit

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Note: Full instructions are provided in the Filling Loop Kit pack.

	10.0 Installation


10.3		Fitting the Filling Loop Kit
1. The filling loop kit supplied with the boiler can be
connected to the taps on the wall plate at this point.
(Either one of two types of loop kit will be supplied -
both function in the same way, differing only in detail).
2. The filling loop is to be connected between the mains
cold water inlet and central heating return isolation taps.
3. The loop and valves must be connected as described
in the instructions supplied with it.
4. Note the orientation of the flow direction arrows on
the stop valve and double check/stop valves.

Blanking Caps

Hose and

Fitting

Cold Inlet

Fig. 44a

CH Return

Pressure

Gauge

Blanking

Plugs

5. Remove the blanking caps from the mains cold water

inlet and central heating return isolation taps (Fig. 44a).

Connect the valves to the taps, ensuring that the fibre

washers supplied are used on these joints.

6. Connect the temporary loop, ensuring that the seals

are fitted.

To fill, test and flush if required (Fig. 44b)

7. Take the blanking plugs from the kit, and using washers
supplied with the boiler, connect them to the central
heating flow and return taps, and the cold inlet tap. The
system can now be filled by opening the cold inlet supply
and stop valves.
8. If desired a suitable gauge can be connected to one of
the taps so that the system may be accurately
pressurised.
9. All joints, fittings and system components can now be
examined for soundness at operating pressure.
10.	The system can be flushed by turning off the central
heating tap and connecting a suitable fitting to the loose
nut. From the fitting a hose pipe can be run to the
nearest convenient drain. When the tap is reopened the
system will flush.
11.	Remove the blanking plug(s), pressure gauge and
flushing equipment from the appliance if used.
12.	Continue with the installation and commissioning.
13.	The filling loop must be disconnected and completely
removed after the system is pressurised.
14.	Depending upon the type of kit supplied either hand

Fig. 44b

tighten the two previously removed blanking caps to the

stop valve and double check valve, or use the caps

supplied in the kit.

© Baxi Heating UK Ltd 2012

31

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Contents Installation & Service Instructions Benchmark Scheme 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 Circulation Pump Drain Off Point General LayoutLayout Expansion Vessel Automatic Air VentAppliance Operation Central Heating Mode FigDomestic Hot Water Mode Fig Frost Protection ModeGold Combi 24, 28 & 33 HE a Technical DataDimensions and Fixings Bypass System DetailsInformation Central Heating CircuitSystem Filling and Pressurising Fig Safety Pressure Relief Valve FigExpansion Vessel Central Heating only Showers Domestic Hot Water Circuit FigHard Water Areas At least Site RequirementsLocation Clearances FigsElectrical Supply Site RequirementVentilation of Compartments Gas SupplyRun PerPipe run Minimum Fall Per Metre50mm per Minimum Fall500mm min Minimum fall RunLikely flue positions requiring a flue terminal guard Plume Displacement KitFlue Below windows or openings on pitched roofs 2000Total equivalent length = +B+C+2x90Bends Flue OptionsTotal Equivalent Length = +B+C+1x90Bend Key Accessory Size Code No Flue AccessoriesTelescopic Flue inc. elbow Twin Flue Connection Twin Flue Duct AdaptorAir Duct Connection Flue Duct Connection Boiler Adaptor Terminal Guard Fig Flue DimensionsFor Roof Terminals Flue TrimPlume Displacement Kit Fig Plume DisplacementElbow 28/33Determining Permissible Lengths ExampleGeneral Fitting Notes 50mm30mm Extension 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 Tighten all the connections Fitting the Safety Pressure Relief Discharge Pipe FigFitting The Boiler Condensate Drain see sectionWall 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 ConnectionsTerminal Block Cover Cable Clamp Screw Pump Automatic Air Vent Selector Switch DisplayCommissioning Commissioning the BoilerIt is necessary to set the boiler to ‘Calibration Mode’ Temperature Control Selector Switch DisplayTemperature Control Gas Pressure Test Point Gas Valve Check the Operational Working Gas Inlet PressureSetting the Timer Completion CompletionCase Front Panel Facia Panel 13 .1 Annual Servicing ServicingAnnual Servicing Inspection 10 ±1 Electrode PositionIgniter Fig Changing ComponentsSpark and Sensing Electrodes Fig Gasket Venturi Injector Cover Gas Inlet Pipe Fan Collector Fan FigVenturi Fig Injector FigInsulation Fig Burner FigExtension 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 FigsPressure Relief Valve Fig Plate Heat Exchanger Fig Diverter Valve Motor Unit & Assembly Fig14.22 P.C.B. Fig Selector Switch FigExpansion Vessel Fig Gas Valve FigCO2 should be 8.4% ± Reduce CO2 Setting the Gas ValveSetting the Gas Valve CO2 check Flue Adaptor Test Point Plug Analyser ProbeElectrical Illustrated Wiring Diagram315316 311 404419 422 400 415 Short Parts ListShort Parts List 426Initial Fault Finding Checks Fault FindingError Codes Pump runs Error 133 flashingGo to section ‘A’ Turn the selector switch to Reset position for 5 secondsClose DHW tap Error 133 flashing Go to section ‘I’Turn Domestic Hot Water Open DHW tap fullyReplace 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 Pages for Notes Pages for Notes GAS Boiler System Commissioning Checklist Service Record Potterton