Hepworth Heating Ltd.,Nottingham Road, Belper, Derbyshire. DE56 1JTGeneral/Sales enquiries:Tel: (01773) 824141 Fax: (01773) 820569One Contact Local S
10221765BCASING BRACKETS FITTINGDiagram 4.14 Installation0888FRONTCASINGBRACKETNo.8 SCREW (8)CAPTIVENUTUPPER CASINGBRACKETCAPTIVENUTDISTRIBUTOR TUBED
11221765B4 InstallationDiagram 4.5SECURING THETHERMOSTAT PHIAL1870THERMOSTATCAPILLARYLOCATIONWASHERPHIALPOCKETRETAININGSPLIT PINDiagram 4.4WATER CONN
12221765B 4 Installation5 Casing Location / FittingDiagram 4.7PIPEWORK CASINGCLEARANCES57 MAX.(2 1/4 in.)'A'VIEW ON ARROW 'A'57
13221765BSIDE VENT GRILLEDiagram 5.1SIDE VENT GRILLE(If required, will fit toleft or right side casing)PLASTIC PEGSIDE CASING(R.H. SHOWN)08855 Casing
14221765B6 Electrical WiringMAINS INLETCONNECTORDiagram 6.10878NLCABLECLAMPCOVERSLOTSLUGSE6.1 Control Box Cable Connection.WARNING. This boiler must
15221765B7 CommissioningPlease ensure the “Benchmark” logbook is completed and leftwith the user.7.1 PreliminariesWith the pump removed the whole of
16221765B7 CommissioningPILOT FLAME DIMENSIONDiagram 7.2PLINTH / DOOR FITTINGDiagram 7.3FLAMEDIMENSIONSPARK GAPDIMENSION0937Pilot shieldomittedfor cl
17221765B8 ServicingACCESS TO FLUEWAY Diagram 8.30908FLUEWAYCLEANINGDOORSELF-TAPPINGSCREW (4)Before commencing any servicing, turn off the gas supply
18221765B8 Servicing9 Replacement Parts6039Diagram 8.4REMOVAL OF BURNERCOMBUSTION CHAMBERCOVERSUPPLYPIPEMAINBURNER (2)INJECTOR (2)GRAPHITECOATED NUT
19221765B 9 Replacement of PartsPILOT ASSEMBLYDiagram 9.20935PILOTINJECTORPILOTTUBEPILOTBURNERASSEMBLYPILOTSHIELDSPARKELECTRODESECURING SCREW (2)A
2221765BImportant InformationIntroduction 3Lighting the Boiler 4General Data 1 5Water Systems 2 7Flue and Ventilation 3 8Installation 4 9Casing Locati
20221765B9 Replacement of PartsDisconnect the lead at the spark electrode, see diagram 9.2.When reconnecting lead make sure that the clear end
21221765B10 Fault Finding - ElectricalDiagram 10.2ELECTRICAL FAULT FINDING1526STARTIsolate electricity supply at the external isolator. Remove the m
22221765BClosed Circuit Voltage (millivolts)DIAGNOSIS GRAPH FOR THERMOCOUPLE CIRCUITOpen Circuit Voltage (millivolts)024681012141618202291113151719212
23221765BPILOT WILL NOT LIGHTSTART HERECheck gas line-open all cocks,rectify any blockages, purge out any air. Does pilot light?Apply match to pilot b
24221765B 11 Spare PartsBecause of our constant endeavour for improvement, details may vary slightly from those shown in these instructions.When ord
3221765BInstructions for UseGeneral InformationPlease read these instructions and follow them carefully for thesafe and economical use of your boiler.
4221765BInstructions for UsePush in slightly and turn gas control knob “A” clockwise until is against its setting point.Turn thermostat control knob “
5221765BGeneral DataABCDE✝FG H J K L M N Pmm 474 214 558 294 359 533 3 300 445 121 156 664 398 398in. 1811/1681/222 111/2141/8211/8113/4171/243/461/82
6221765BBOILER CASING HEIGHT(S)Diagram 1.2MAX.900 (351/2 in.)MID. 890 (35in.)MIN. 860 (34in.)MAX.867 (341/8 in.)MID. 857 (333/4 in.)MIN. 827 (321/2 in
7221765BFRONT CLEARANCEDiagram 1.50906700 (271/2 in.)BOILERWALL ORFIXTURE1 General Data2 Water SystemsDiagram 2.1086927metreMax.PUMPTo HeatingCircuitI
8221765B2 Water Systems3 Flue and VentilationPRESSURE LOSS OF BOILERDiagram 2.313701.00.80.60.40.20302010001020 3040 50FLOW RATE (LITRES/MINUTE)WAT
9221765BUnder Car Port etc.H,IJDFKAAFGEAGGB,CB,CFFKKKCLLGG3 Flue and Ventilation1112A DIRECTLY BELOW AN OPENABLE mmWINDOW, AIR VENT, OR ANYOTHER VE
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