Hepworth Heating Ltd.,Nottingham Road, Belper, Derbyshire. DE56 1JTGeneral/Sales enquiries:Tel: (01773) 824141 Fax: (01773) 820569One Contact Local S
10221788B3 Water Systems3.5 Domestic Hot Water SystemGeneral. The domestic hot water service must be in accordancewith the current issue of BS5546, r
11221788B4 Flue and Appliance Preparation4.1 UnpackingOpen the carton containing the boiler, remove the end fittingwhich contains, wall mounting brack
12221788B4 Flue and Appliance PreparationDiagram 4.3Diagram 4.43797**CLCL168122122112112FIXINGPOINTSFIXINGPOINTSFLUEHOLECLEARANCEHOLE (2)42035119119**
13221788B5 Boiler Installation5.1 Mounting the BoilerRemove the boiler from the carton tray.If necessary, for a gravity domestic hot water system cut
14221788B5 Boiler InstallationDiagram 5.4TABLE 4.SHORT FLUE 100-280 CUTTING LENGTHS100-150150-200200-280WALLTHICKNESSAIR DUCTFLUE DUCT0 130 130 020 19
15221788B5 Boiler InstallationDiagram 5.4ADiagram 5.53803AIRDUCTSYELLOWSEALINGTAPEFLUE HOODASSEMBLYSEMI-TRANSPARENTSEALING TAPE3804FLUEDUCTFLUE DUCT/F
16221788B5 Boiler InstallationDiagram 5.78040SECURINGSCREWDiagram 5.8Diagram 5.9MULTI-FUNCTIONALCONTROL CABLEEARTHTERMINALCONTROLTHERMOSTATTHERMOSTATC
17221788B6 CommissioningDiagram 6.180462 to 4mm12 to 14mmFA ELECTRICALCONTROL BOXB THERMOSTATCONTROL KNOBC GAS SERVICECOCK (SHOWN INOFF POSITION)D MUL
18221788B6 CommissioningDiagram 6.33811ENSURECASE ENGAGEMENTCASECONTROLSCOVER6.3 TestingTo check the operation of the flame failure device, turn the g
19221788B8 ServicingNotes: To ensure the continued efficient and safe operation ofthe boiler it is recommended that it is checked and serviced asnece
2221788BImportant InformationIntroduction 3Lighting the Boiler 4General Data 1 5Flue & Ventilation 2 7Water Systems 3 9Flue and Appliance Preparat
20221788B8 Servicing8.3 Cleaning Heat ExchangerPlace a sheet of paper in the base of the combustion chamber.Remove the baffles from the heat exchanger
21221788BNONONONONONONONONOYESYESYESYESYESYESYESYESYESCheck gas line - open all cocks,rectify any blockages, purge out any air. Does pilot light?Apply
22221788B9 Fault FindingDiagram 9.2Diagram 9.2ATHERMOCOUPLE FAULT FINDING4634Is the connection between thethermocouple and the multi-functionalcontrol
23221788B9 Fault FindingELECTRICAL FAULT FINDINGDiagram 9.39007Isolate the supply. Gain access to the controlbox, check all connections etc.Restore s
24221788B9 Fault FindingFUNCTIONAL FLOWDiagram 9.4Diagram 10.180503817PHIAL POCKETGLANDSEALCONTROL KNOBSECURINGSCREW (2)SPLITPINCONTROLTHERMOSTATMULTI
25221788B10 Replacement of PartsNote: To ease the removal of the piezo unit it is advisable totemporarily remove the boiler thermostat from the contro
26221788B10 Replacement of PartsDiagram 10.4Diagram 10.53821SOLENOIDCOVERMULTI-FUNCTIONALCONTROLSOLENOIDRETAININGCLIPSOLENOIDBRACKETELECTRICALCONNECTI
27221788B11 Spare PartsDiagram 11.11 429549 Multi-functional control 312 9262 208040 Joint ring 334 5923 203099 Injector - 30BF 313 3894 202432 Thermo
28221788BBecause of our constant endeavour for improvement, details may vary slightly from those shown in these instructions.
3221788BInstructions for UseIntroductionPlease read these instructions and follow them carefully for thesafe and economical use of your boiler.The Ult
4221788BInstructions for UseDiagram 2A PIEZO UNIT BUTTONB THERMOSTAT CONTROL KNOBC GAS SERVICE COCK(shown in off position)D CONTROL BUTTON (GAS)E VIEW
5221788B1 General DataImportant NoticeThis boiler is for use only on G20 gas.All dimensions are given in millimetres (except as noted).This boiler can
6221788B1 General Data1.5 Gas SupplyThe gas installation shall be in accordance with the currentissue of BS6891.The supply from the governed meter mus
7221788B1 General Data1.12 Boiler ClearancesRefer to diagram 1.2.This boiler must be positioned so that at least the minimumoperational and servicing
8221788B2 Flue and Ventilation2.5 Boilers in a CompartmentWhere the installation of the boiler will be in an unusual position,special requirements are
9221788B3 Water SystemsThe installation of the boiler must comply with the requirementsof the current issue of BS6798.3.1 Frost ProtectionIf the posit
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