Worcester GREENSTAR 24i junior Instruction Manual page 46

F
E
D
46
REPLACEMENT OF PARTS
11
A
B
C
C
F
G
INSTALLATION & SERVICING INSTRUCTIONS FOR WORCESTER GREENSTAR 24 i junior/28 i junior
REPLACEMENT OF PARTS
10. Replacing control
IMPORTANT:
The control is supplied within its plastic
housing. The complete unit must be replaced.
10.1
C
10.1 Remove the 3 screws (C) retaining the
10.2 Using a suitable tool (D), press the button
10.3 Support the control and unclip control
10.2
NOTE:
E
10.3
Do not replace the control unit if a
CO/CO analyser is NOT available.
2
Remove ALL electrical 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.
front facia making sure to support the facia
when removing the last screw.
(E) upwards and slide the control support
bracket (F) to the left.
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.
After re-assembly, check the CO/CO
levels as described in the setting of the
air/gas ratio section.
IMPORTANT: ENSURE CODE PLUG
IS RE-FITTED TO THE NEW
CONTROL. IF THIS IS NOT DONE
THE BOILER WILL INDICATE
ERROR AND WILL NOT FUNCTION.
8 716 115 166b (03/2009)
2