
S
E
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VICI
NG
& S
PA
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INSTALLATION & SERVICING INSTRUCTIONS
35
INSPECTION AND SERVICE
6-720-611-730b (12.05)
INSPECTION AND SERVICE
Burner:
Check that the boiler is completely isolated from
the gas supply.
1 Remove the clips (A) and unscrew the two
bolts (B).
Unscrew and remove the two hexagon screws
(C) securing the fan.
Slacken fully the rear securing bolt (D).
Remove the burner cover plate (E).
2 Remove the burner (F) and clean the
components.
Do not use a wire brush.
Re-assemble burner in reverse order using a
new seal (G).
Adjust gas/air ratio. See 'Setting the gas/air
ratio'.
MAX PRESSURE:
When the heating system water is at maximum
temperature, 2.65 bar must not be exceeded. If
this pressure is exceeded then an extra expansion
vessel must be fitted into the system return as
close as possible to the appliance.
If the system does not retain the pressure, the
expansion vessel and the heating system should
be checked for leaks.
ELECTRICAL WIRING:
Check the electrical wiring for physical damage
and replace any damaged wires.
A
B
C
D
F
G
B
D
E