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Worcester WM 12, Installation And Servicing Instructions, Page: 1 / 37

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Worcester WM 12 Installation And Servicing Instructions Download Page 1

WALL MOUNTED

DANESMOOR

WM 12/19

ROOM SEALED BF WALL MOUNTED

OIL-FIRED PRESSURE JET APPLIANCE

INSTALLATION AND

SERVICING INSTRUCTIONS

BOILER OUTPUT

Hot Water and Central Heating

MINIMUM 12 kW

(41,000 Btu/h)

MAXIMUM 19 kW

(65,000 Btu/h)

THESE INSTRUCTIONS APPLY TO UK MODELS ONLY

THESE INSTRUCTIONS ARE TO BE LEFT WITH THE APPLIANCE

Summary of Contents for WM 12

Page 1: ...FIRED PRESSURE JET APPLIANCE INSTALLATION AND SERVICING INSTRUCTIONS BOILER OUTPUT Hot Water and Central Heating MINIMUM 12 kW 41 000 Btu h MAXIMUM 19 kW 65 000 Btu h THESE INSTRUCTIONS APPLY TO UK M...

Page 2: ...all with wall thickness ranging from 102 mm 4 inches to 460 mm 18 inches When installing the appliance on a 102mm 4inch wall the 4inch Standoff Kit must be used The stand off kit reduces the distance...

Page 3: ...5 1 76 2 23 230 11 5 9 21 1 72 000 19 65 000 NOMINAL BOILER RATING AT NORMAL OPERATING TEMPERATURE 12 19 Table 2 Electro Oil Inter B9C Burner See Fig 28 Fuel Nozzle Pump Pressure p s i Fuel Flow Rate...

Page 4: ...at Phial retaining spring Frost thermostat 4 Remote lockout reset button Internal control box Thermostat Knob Wall mounting duct Optional programmer position Cabinet 1 7 5 2 4 3 6 1 Wall mounting brac...

Page 5: ...m locking screw Burner hanging bracket Burner mounting flange Burner O shaped gasket Burner Burner Electrical plug lead Burner retaining screw Flue splash plate seal Telescopic flue Flue gasket Telesc...

Page 6: ...n 130mm 70mm 55mm 315mm 315mm 315mm 102mm 4 inch wall with stand off kit 229mm 9 inch wall 296mm 12 inch wall 460mm 18 inch wall NOTE For cabinets set at the optional 285mm position excluding 102 and...

Page 7: ...the split pin from the thermostat phial pocket located in the front right hand side of the boiler Carefully withdraw the control and automatic high limit thermostats from the pocket noting their posit...

Page 8: ...gut ter or painted eaves then an aluminium or stainless steel shield at least 750mm long should be fitted to protect the surface 5 If a terminal is fitted less than 2 metres above a surface to which...

Page 9: ...al facing the terminal 1200 K Vertically from a terminal on the same wall 1500 L Horizontally from a terminal on the same wall 750 NOTE Flue outlet is shown in fig 6 and7 9 L F F K G A E B C D H J NOT...

Page 10: ...il tank is positioned below the burner An inlet and return loop should be created between the de aerator and oil pump De aerators should be fitted externally to the appliance 8 8 The oil supply pipe d...

Page 11: ...5 Double pipe sub gravity feed system MAXIMUM ALLOWABLE PIPE RUN HEAD metres metres 8 mm inside dia pipe 10 mm inside dia pipe 10 mm O D copper 12 mm O D copper 0 35 100 0 5 30 100 1 0 25 100 1 5 20 8...

Page 12: ...Expansion System The feed and expansion pipes must rise continuously from the appliance and must be of the minimum diameter shown in fig 12 The cistern must be arranged to provide a minimum static he...

Page 13: ...t Domestic hot water cylinder Pressure gauge Safety valve To system filling device see fig 14 Fig 14 System filling and make up Heating return Non return valve Non return valve Test cock Temporary hos...

Page 14: ...tor circuits The domestic hot water and radiator circuits are independently controlled by two motorised valves via a cylinder thermostat and a room thermostat Both thermostats switch the water cir cul...

Page 15: ...w green yellow brown brown brown blue green yellow E N L L N E E N 1 1 2 3 4 5 6 green yellow brown orange brown brown green yellow blue white grey Time clock white connector brown orange violet 7 8 9...

Page 16: ...reset thermostat brown blue green yellow E N L L N E E N 1 1 2 3 4 5 6 Time clock white connector 7 8 9 10 Control thermostat Power on indicator Lock out indicator C 1 Drawn viewed from the front of t...

Page 17: ...rmostat Lockout reset switch brown 1 2 3 4 5 6 1 2 3 brown E N N 1 10 E JUNCTION BOX SEE FIG 19 HONEYWELL 10 WAY JUNCTION BOX HONEYWELL PART No 42002116 001 Wall mounting duct Control box earth rivet...

Page 18: ...E E N 1 1 2 3 4 5 6 7 8 9 10 C 1 Boiler frost thermostat Lockout reset switch brown 1 2 3 4 5 6 1 2 3 orange E N 1 N 6 4 10 7 E JUNCTION BOX SEE FIG 19 HONEYWELL 10 WAY JUNCTION BOX HONEYWELL PART No...

Page 19: ...mount ed programmer do not wire in this time con troller Wire as shown in Fig 18 T6160B Room stat green yellow blue 2 1 3 L641A Cylinder stat orange grey 1 2 C white V4073A Mid position zone valve 1 N...

Page 20: ...thermostat brown blue green yellow E N L L N E E N 1 1 2 3 4 5 6 Time clock white connector 7 8 9 10 Control thermostat Power on indicator Lock out indicator C 1 Drawn viewed from the front of the fa...

Page 21: ...reset thermostat brown blue green yellow E N L L N E E N 1 1 2 3 4 5 6 Time clock white connector 7 8 9 10 Control thermostat Power on indicator Lock out indicator C 1 Drawn viewed from the front of t...

Page 22: ...time con troller Wire as shown in Fig 21 T6160B Room stat green yellow blue 2 1 3 L641A Cylinder stat orange grey 1 C V4043H Hot water zone valve 1 N E 4 5 6 7 8 9 10 L N HTG HW Optional frost thermo...

Page 23: ...l box and wall mounting duct See fig 25 13 Remove the internal control box by undoing the two screws holding the facia to the internal control box and pivot the facia down 14 There is an earth loom th...

Page 24: ...to pre vent oil or combustion gases entering the wall cavity in the event of a leakage 11 Slide the internal control box back into position ensuring the wall mounting duct earth lead is connected back...

Page 25: ...n the wall mounting duct to the external duct 2 No 6 locking screws 3 Completely seal the joint on all four sides between the wall mounting duct and the external duct with the sealant provided 4 Exter...

Page 26: ...en the main oil supply valve at the tank and check for any leaks 4 Remove the flexible oil line from the inlet of the oil pump and place in a suitable container Open the isolating valve between the oi...

Page 27: ...equence is theninitiated Repeattheprocedureuntilaflameisestablished Note Persistent lockout when running indicates a fault and a Service Engineer should be consulted 12 12 Run the boiler for approxima...

Page 28: ...alve are clear of any debris Discard the check valve if the holes cannot be cleared or if the unit is defective and replace with a new one e Reassemble in reverse order 7 It is strongly recommended th...

Page 29: ...the inlet to the oil pump goes to the inlet on the connection block and the flexible oil line on the return of the oil pump goes to the return on the connection block 2 With the sponge O shaped gasket...

Page 30: ...cal shut off valve Fig 29 Service switch positions Service Off Run Note Always set the switch to run after servicing Fig 30 Hanging of burner during commissioning service Fire valve clips Burner hangi...

Page 31: ...nsformer Danfoss EBI 052F0030 excludes cable 1 8 716 156 696 0 Mechanical shut off valve 1 8 716 156 658 0 Flexible oil line kit Worcester 1 8 716 157 033 0 Main harness service switch assembly Worces...

Page 32: ...ats Programmer open circuit Check by linking 7 and 9 on the connector Faulty control box Replace if necessary Combustion settings incorrect Set up as in installation instructions Faulty nozzle Replace...

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Page 36: ...All goods sold are subject to our official Conditions of Sale a copy of which may be obtained on application PUBLICATION 8 716 114 741a 11 07 Bosch Group Worcester Bosch Group Cotswold Way Warndon Wo...

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