12.~4
,,
...
•············••·
.••
I
~
"-.
I \
I \
I
~
\
/ I
I
I
\ I
I
~
I
\
\
\
••
'•
..
REPLACEMENT
OF
PARTS
'
~''
If~:
. .
..
..
\
\
I
/
/
,I
I
I
I
I
I
I
REPLACEMENT
OF
PARTS
IMPORTANT: AFTER REASSEMBLY
THE
COMBUSTION
MUST
BE
CHECKED
USING
THE
PROCE-
DURE IN THE SECTION "SETTING
THE
GAS AIR RATIO".
MEASURE-
MENT
AND
SETTING
(IF
NECES-
SARY) OF
THE
GAS RATIO
MUST
NOT BE ATTEMPTED
UNLESS
THE
PERSON
IS
EQUIPPED
WITH
A
COMBUSTION
ANALYSER
CON-
FORMING
TO
BS 7927 AND IS COM-
PETENT IN ITS USE.
12.
Fan assembly
~
Remove electrical
connector
from fan.
~
Remove
condensate
trap
(see page 42).
12.1
~
Undo
the union connection (A).
~
Remove
wire
clip
(B) from air/gas
adjustment
assembly (C) then pull gas
pipe
down.
12.2
~
Unscrew
two
screws
(D).
12.3
~
Remove fan from boiler.
12.4
~
Remove three
screws
retaining the
air/gas adjustment
assembly (E).
~
Reassemble with
new
fan assuring that
seals are correctly fitted.
13.
Electrode assembly
~
Disconnect
spark
electrodes
and flame
sensor connection.
~
Remove
two
screws
(F).
~
Remove spark/flame
electrode
assem·
bly
(G) from heat exchanger.
INSTALLATION & SERVICING INSTRUCTIONS
FOR
WORCESTER BOSCH GREENSTAR
25CDI/30CDI/37CDI/42
co;
~ORCESTER
6 720
613
700a
(2006/11)
Bosch
Group
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