Worcester Greenstar Ri User Manual page 44

C
43
REPLACEMENT OF PARTS
13.1
D
12.1
A
12.2
B
12.3
13.4
F
13.2
E
INSTALLATION & SERVICING INSTRUCTIONS FOR WORCESTER BOSCH GREENSTAR Ri
REPLACEMENT OF PARTS
The following components require
the air / gas manifold and fan
assembly to be removed:
Pressure switch
Fan
Electrode assembly
Burner
Heat exchanger
I M P ORTANT: I F TH E
BETWEEN THE AIR/GAS MANIFOLD
AN D TH E H EAT E XCHANG E R I S
DISTURBED THE SEALING GASKET
MUST BE REPLACED.
12. Air / gas manifold and fan
assembly
Remove electrical connector from fan.
Remove wire clip from gas valve outlet then
pull gas adjustment assembly free from plastic
connector and pull clear of case. See 6.1.
12.1 Undo and remove securing nut (A) from the
top of the heat exchanger.
12.2 Remove stainless steel viewing mirror (B).
12.3 Rotate fan and air/gas manifold assembly
(shaded) around the top of the heat
exchanger until the lug on the air/gas
manifold is visible.
Lift up assembly and remove from boiler.
13. Pressure switch
13.1 Remove electrical connections (C).
13.2 Slacken top retaining screw and remove
bottom screw. (D).
13.3 Remove tube (E).
13.4 Remove 2 screws (F) retaining pressure
switch to bracket.
Refit new pressure switch to bracket.
I M PORTANT: E N S U R E TU B E I S
REFITTED TO PRESSURE SWITCH
13.3
8 716 109 699a (05/05)
JOI NT