Worcester OIL HEATSLAVE 20/25

Fit a new control board in the reverse order.
14. Operating Switch
Check that the electricity supply has been turned off.
Remove the appliance front, top panel and the control box top
cover.
Remove the two screws holding the facia to the underside of
the electrical control box and the two screws holding the facia
to the side panels. Remove the MAINS ON and LOCKOUT
indicator light connectors from terminals
X9 and X11 on the
control board.
Remove the spade connectors from the domestic hot water
central heating control thermostat and operating switch noting
their positions. See Fig 18.
Depress the operating switch locking tabs behind the facia and
remove the operating switch and replace in reverse order.
15. Programmer (where fitted)
Check that the electricity supply has been turned off.
Remove the appliance front, top panel and the control box top cover.
Remove the two screws holding the facia to the underside of the
electrical control box and the two screws holding the facia to the
side panels. Remove the MAINS ON and LOCKOUT indicator light
connectors from terminals
X9 and X11 on the control board.
Remove the spade connectors from the domestic hot water
and central heating control thermostat noting their positions.
See Fig 18.
Unplug the programmer from the control board and carefully
remove the facia from the cabinet assembly.
Remove the four pozi-drive screws holding the programmer to
the housing and withdraw the programmer.
Fit a replacement programmer in the reverse order having first
set the switch on the rear of the unit to P. as described in the
fitting instructions.
Use only the specified programmer. Do not attempt to fit any
other model or make.
16. Baffles
For replacement of boiler baffles see Section 18.6.
37
20. Short Parts List
Part Manufacturers Reference Qty WHS Part No.
Burner for 12/14 Bentone B9A 1 8 716 104 431 0
B9A Combustion Head PL 6/7/21.5/10-E x 78mm 1 8 716 157 041 0
Burner for 15/19 Bentone B9B 1 8 716 142 705 0
B9B combustion Head PL 6/7/21.5/10 x 78mm 1 8 716 156 697 0
Burner for 20/25 Bentone B11C 1 8 716 104 432 0
B11C Combustion Head PL 10/4/24/10 x 78mm 1 8 716 142 784 0
Burner for 26/32 Bentone Sterling 40 1 8 716 142 700 0
Sterling 40 Combustion Head PL 6/7/21.5/10 x 78mm 1 8 716 156 697 0
Burner control 1. Control Box Satronic TF 832.3 1 8 716 156 648 0
B9 and B11 Photocell Satronic MZ770 1 8 716 142 735 0
Sterling 40 Photocell Satronic MZ770 1 8 716 156 692 0
Control Box Base Satronic S01 S701 1 8 716 142 782 0
Ignition Electrode 1 8 716 142 752 0
Motor B9 AEG or Simel 70 W 1 8 716 156 597 0
Motor B11 AEG (FHP) 90W 1 8 716 142 732 0
Motor Sterling 40 AEG (FHP) 90W 1 8 716 156 645 0
Oil Pump B9 Danfoss BFP41L3 1 8 716 142 743 0
Oil Pump (B11 and Sterling 40) Danfoss BFP11L3 1 8 716 142 736 0
Transformer 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 WHS 1 8 716 156 663 0
Burner 'O' Shaped Gasket WHS 1 8 716 140 902 0
Control Thermostat Siebe K36-P2312 1 8 716 142 309 0
Automatic Reset High Limit Thermostat Siebe LO7-P1022 1 8 716 142 311 0
Manual Reset High Limit Thermostat Siebe LM7-P5075 1 8 716 142 310 0