Bosch Worcester GREENSTAR CDi Series Instruction Manual page 46

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REPLACEMENT OF PARTS
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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;
~ O R C E S T E R
6 720 613 700a (2006/11)
Bosch Group