Hepworth Heating Ltd.,Nottingham Road, Belper, Derbyshire. DE56 1JTGeneral/Sales enquiries:Tel: (01773) 824141 Fax: (01773) 820569One Contact Local S
10221764BCASING BRACKETS FITTINGDiagram 4.14 Installation0888FRONTCASINGBRACKETNo.8 SCREW (8)CAPTIVENUTUPPER CASINGBRACKETCAPTIVENUTDISTRIBUTOR TUBED
11221764B4 InstallationDiagram 4.5SECURING THETHERMOSTAT PHIAL1870THERMOSTATCAPILLARYLOCATIONWASHERPHIALPOCKETRETAININGSPLIT PINDiagram 4.4WATER CONN
12221764B 4 Installation5 Casing Location / FittingDiagram 4.7PIPEWORK CASINGCLEARANCES57 MAX.(2 1/4 in.)'A'VIEW ON ARROW 'A'57
13221764BSIDE VENT GRILLEDiagram 5.1SIDE VENT GRILLE(If required, will fit toleft or right side casing)PLASTIC PEGSIDE CASING(R.H. SHOWN)08855 Casing
14221764BAPAPPPCBCBCBCB230(9)25(1)230(9)230(9)6 Electrical WiringMAINS INLETCONNECTORDiagram 6.10878NLCABLECLAMPCOVERSLOTSLUGSE6.1 Control Box Cable
15221764B7 CommissioningDiagram 7.1BOILER COMPONENTSLJJHMK(Shownclosed)E9017BCAFNGSETTINGPOINTSETTINGPOINTK(Shownopen)= OFF= PILOT/IGNITION= MAIN BUR
16221764B7 CommissioningPILOT FLAME DIMENSIONDiagram 7.2PLINTH / DOOR FITTINGDiagram 7.3FLAMEDIMENSIONSPARK GAPDIMENSION0937Pilot shieldomittedfor cl
17221764B8 ServicingACCESS TO FLUEWAY Diagram 8.30908FLUEWAYCLEANINGDOORSELF-TAPPINGSCREW (4)ACCESS FOR SERVICINGDiagram 8.29018GRAPHITECOATED NUTTIE
18221764B8 Servicing9 Replacement Parts6039Diagram 8.4REMOVAL OF BURNERCOMBUSTION CHAMBERCOVERSUPPLYPIPEMAINBURNER (2)INJECTOR (2)GRAPHITECOATED NUT
19221764B 9 Replacement of Parts9013Diagram 9.1REMOVAL OF GAS VALVEPILOT ASSEMBLYDiagram 9.20935PILOTINJECTORPILOTTUBEPILOTBURNERASSEMBLYPILOTSHIE
2221764BImportant InformationIntroduction 3Lighting the Boiler 4General Data 1 5Water Systems 2 7Flue and Ventilation 3 8Installation 4 9Casing Locati
20221764B9 Replacement of PartsDisconnect the lead at the spark electrode, see diagram 9.2.When reconnecting lead make sure that the clear end is f
21221764B10 Fault Finding - ElectricalDiagram 10.2ELECTRICAL FAULT FINDING1526STARTIsolate electricity supply at the external isolator. Remove the m
22221764BClosed Circuit Voltage (millivolts)DIAGNOSIS GRAPH FOR THERMOCOUPLE CIRCUITOpen Circuit Voltage (millivolts)024681012141618202291113151719212
23221764BPILOT WILL NOT LIGHTSTART HERECheck gas line-open all cocks,rectify any blockages, purge out any air. Does pilot light?Apply match to pilot b
24221764B 11 Spare PartsBecause of our constant endeavour for improvement, details may vary slightly from those shown in these instructions.When ord
3221764BInstructions for UseGeneral InformationPlease read these instructions and follow them carefully for thesafe and economical use of your boiler.
4221764BInstructions for UsePush in slightly and turn gas control knob “A” clockwise until is against its setting point.Turn thermostat control knob “
5221764BGeneral 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
6221764BBOILER 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
7221764BFRONT CLEARANCEDiagram 1.50906700 (271/2 in.)BOILERWALL ORFIXTURE1 General Data2 Water SystemsDiagram 2.1086927metreMax.PUMPTo HeatingCircuitI
8221764B2 Water Systems3 Flue and VentilationPRESSURE LOSS OF BOILERDiagram 2.313701.00.80.60.40.20302010001020 3040 50FLOW RATE (LITRES/MINUTE)WAT
9221764BUnder Car Port etc.H,IJDFKAAFGEAGGB,CB,CFFKKKCLLGG3 Flue and Ventilation1112A DIRECTLY BELOW AN OPENABLE mmWINDOW, AIR VENT, OR ANYOTHER VE
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