Worcester GREENSTAR 25Si Instruction Manual page 41

Remove control retaining
screw
40
INSPECTION AND SERVICE
2
E
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 ITS USE.
1
B
A
To Clean the Heat Exchanger
1
2
Cleaning Syphon
3
3
E
INSTALLATION & SERVICING INSTRUCTIONS FOR WORCESTER GREENSTAR 25Si/30Si
IMPORTANT:
IF THE JOINT BETWEEN THE
AIR/GAS MANIFOLD AND THE HEAT
EXCHANGER IS DISTURBED THE
SEALING GASKET MUST BE
REPLACED.
AFTER COMPLETING THE
SERVICE OF THE APPLIANCE, THE
CO/CO 2 MUST BE CHECKED AND
SET TO THE LIMITS SHOWN IN THE
"SETTING THE AIR/GAS RATIO"
There is a special accessory kit available
specifically designed for cleaning the heat
exchanger. If required order 7 716 192 312.
Isolate the power to the appliance and
remove outer case and base panel.
Remove the cover panel (A) by removing
retaining screw (B), or on later appliances
push out from inside the appliance.
Remove clip (C) from gas valve outlet.
Pull gas adjustment assembly (D) or outlet
elbow (E) free from the plastic connection on
the gas valve.
Pull gas adjustment assembly (D) or outlet
elbow (E) forward to clear case.
There is no need to remove the Syphon
Assembly to clean.
To drain debris from the syphon, release the
clips and remove the drainage cap (E) from
the bottom of the syphon.
Catch the debris and condensate from the
syphon into a suitable container.
Re-fit the drainage cap (E) to bottom of the
syphon.
8 716 115 165a (06/2008)