Worcester GREENSTAR 12i Instruction Manual page 42

42
INSPECTION AND SERVICE
R
Small
tab
S
P
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.
9
M
N
O
Q
I F TH E JOI NT
INSTALLATION & SERVICING INSTRUCTIONS FOR WORCESTER GREENSTAR 12i/24i System
INSPECTION AND SERVICE
9 Remove burner (M).
Remove top baffle (N).
Remove lower baffle (0).
Remove the two pozi-drive screws (P)
retaining the access cover (Q) on the sump.
Access the heat exchanger flue ways by
inserting the cleaning brush (7 716 192 312)
through the top access hole in the casing (R).
Clean heat exchanger flue ways (S) using the
cleaning brush (7 716 192 312) removing
any debris from the access point in the sump.
Clean around sealing surface on sump and
replace access cover (Q). Using a suitable
container to collect water from syphon
connection at the base of the boiler flush
heat exchanger with water.
Re-assemble ensuring that the lower baffle
(O) and the top baffle (N) are refitted
correctly.
When re-fitting the burner ensure that it fits
centrally within the heat exchanger and
location tabs are situated in location holes.
Ensure seal is replaced with new seal
and is correctly fitted.
Check the syphon unit for blockage before
refitting to boiler.
Reassemble and check combustion as
stated in "SETTING THE AIR/GAS
RATIO"
NOTE: To show the heat exchanger more
clearly it has been shown external to the
appliance
THE BAFFLES (O) AND (N) MUST
B E R E F IT TE D I NTO TH E H E AT
E XCHANG E R AS S HOW N I N 9.
FAILURE TO DO SO MAY RESULT
IN DAMAGE TO THE BOILER
8 716 115 167b (03/2009)