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12.3
REPLACEMENT OF PARTS
12. Replacing control
The control is supplied within its plastic
housing. The complete unit must be replaced.
Remove ALLelectrical connections from
the control PCB including where cables run
through restraints. These can be unclipped
from the plastic moulding noting their
position.
Remove the code plug (B). The code plug
should be left attached to the frame of the
boiler by its plastic safety thread.
12.1
Remove the 3 screws (C) retaining the
front facia making sure to support the facia
when removing the last screw.
12.2
Using a suitable tool (D), press the button
(E) upwards and slide the control support
bracket (F) to the left.
12.3
Support the control and unclip control
support cable (G) from the boiler frame.
Remove the support cable and fit to the
new control.
Remove appropriate cable restraints from
the new control box.
Fit control to the boiler.
Re-connect support cable to the boiler and
all electrical connections to the new control.
IMPORTANT: ENSURE CODE PLUG
IS RE-FITTED TO THE NEW
CONTROL. IF THIS IS NOT DONE
THE BOILER WLL INDICATE
ERROR AND WILL NOT FUNCTION.
REPLACEMENT OF PARTS
INSTALLATION & SERVICING INSTRUCTIONS FOR WORCESTER GREENSTAR 12i System/24i System
8 716 107 375b (07/05)
44
SERVICING
& SPARES
12
A
12.1
C
C
C
12.2
F
E
F
D
E
G
B