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A
E
18.1
H
INSTALLATION & SERVICING INSTRUCTIONS FOR WORCESTER GREENSTAR 25Si/30Si
8 716 107 337b (11/05)
15.1
16
D
F
18.2
REPLACEMENT OF PARTS
15.2
15. Fan
15.1 Remove 3 screws (A) retaining mixing
B
15.2 Remove 2 screws (B) retaining the fan to
15.3 Remove screw (C) retaining plate and
16. Electrode assembly
15.3
C
17. Burner
18. Heat Exchanger
17
18.1 Remove clip from plastic elbow on the flow
18.2 Remove plastic nut from the bottom of
18.3 Rotate lever to release return pipe.
G
18.4 Undo flue connection from sump.
I M P ORTANT:
BETWEEN THE AIR/GAS MANIFOLD
AN D TH E H EAT E XCHANG E R I S
DISTURBED THE SEALING GASKET
MUST BE REPLACED.
18.3
chamber.
the air/gas manifold.
remove.
Re-assemble with new fan ensuring seals
are correctly fitted.
Disconnect spark electrodes and flame
sensor connection.
Remove clamping plate (D).
Remove spark/flame electrode assembly (E)
from heat exchanger.
Remove seal (F) from the top of the heat
exchanger.
Remove burner (G).
Replace new burner in correct position.
Ensure that burner tab fits correctly into hole.
Ensure that the seal is replaced with a new one.
Isolate flow and return valves then drain the
boiler.
Remove siphon.
pipe and pull flow pipe away from heat
exchanger.
the boiler.
Pull heat exchanger assembly up to clear.
Reassemble and check combustion as
stated in the gas conversion section.
I F
TH E
18.4
REPLACEMENT OF PARTS
JOI NT
46
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