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Remove control retaining
screw
E
2
D
INSTALLATION & SERVICING INSTRUCTIONS FOR WORCESTER GREENSTAR 25Si/30Si
8 716 107 337b (11/05)
B
3.1
F
C
INSPECTION AND SERVICE
COMBUSTION TESTING MUST BE CARRIED
OUT BY A COM PETE NT PE R SON. IT M UST
NOT BE ATTEMPTED UNLESS THE PERSON
CARRYING OUT THE COMBUSTION CHECK
I S E Q U I P P E D W I T H A C O M B U S T I O N
ANALYSER CONFORMING TO BS 7927 AND
IS COMPETENT IN IT'S USE.
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.
1
To Clean the Heat Exchanger
1
With outer case and base panel removed and
A
the power isolated from the appliance,
remove the cover panel (A) by removing the
retaining screw (B).
2
Remove clip (C) from gas valve outlet.
Pull gas adjustment assembly (D) free from
the plastic connection on the gas valve.
Pull gas adjustment assembly (D) forward to
clear case.
Removing Siphon
3.1 Undo plastic nut (E) on the siphon outlet.
Drop condensate tube away from siphon.
3.2 Remove hose (F).
3.3 Remove siphon
Siphon
The siphon body is transparent so contents
can be examined for any blockage.
If necessary flush with clean water.
3.2
I F
TH E
JOI NT
3.3
INSPECTION AND SERVICE
38
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