
S
E
R
VICI
NG
& S
PA
R
E
S
INSTALLATION & SERVICING INSTRUCTIONS
6-720-611-730b (12.05)
37
REPLACEMENT PARTS
REPLACEMENT PARTS
Fan Assembly:
Undo lower pipe union on gas pipe (E).
Remove fan lead and earth connector.
The earth connector has a positive clip fixing.
Remove fixing screws attaching fan (A) to the
burner cover (B).
Remove fan (A) with gas pipe (E) and mixer
unit (D).
Twist mixer unit (D) with gas pipe (E) to
separate from fan (A).
Flap Valve:
Undo lower pipe union on gas pipe (E).
Remove pipe (E) by pushing upwards and to
the rear.
Twist mixer unit (D) with gas pipe (E) to
separate from fan (A).
Remove flap valve (F) from within fan intake
(A) and replace.
NOTE: Ensure the flap valve is fitted correctly
with rubber flap upwards.
Condensate pump:
Disconnect both inline electrical connectors
(H) to the condensate pump (G).
Remove 2 retaining screws (L).
Remove 6mm flexible tube (J) from pump.
Remove large flexible pipe (K) from condensate
tank. Take care as there may be condensate
remaining in the pipe.
Carefully remove the condensate pump (G)
from the boiler and pour any excess condensate
into a suitable container for safe disposal.
Circulating pump:
Unscrew the pump union nut (N), remove clip
(P) at pump outlet.
Carefully remove the pump (M) and disconnect
the electric leads.
Alternatively:
Release the 4 Allen screws (Q) to remove and
replace the pump head (R).
Diverter valve:
Turn off service cocks.
Remove condensate pump (G).
Unplug connector from 3-way valve motor (S).
Remove clip (T) from diverter valve (V),
disconnect central heating pipe (U) at isolation
valve.
Remove clip (W) from diverter valve and undo
pump union nut (N).
Remove diverter valve (S, V) from boiler.
Remove clips retaining the two brass plugs in
the body of the diverter valve (V). Replace plugs
and clips into new valve.
After refitting:
Refill and re-pressurise the system.
See 'Filling the System' and 'Water Treatment'
under the Commissioning section.
Diverter valve motor:
Unplug connector from 3-way valve motor (S).
Pull out retaining clip (X).
Remove motor (S).
E
C
D
B
A
H
J
L
K
G
N
P
M
R
Q
N
S
V
X
T
W
U
F