40
7.1.5 Removal of combustion
chamber cover (fig. 59).
•
Remove front casing as in Section
7.1.3,
•
Slacken the 2 case retaining screws
(2).
•
Undo the 5 captive inner casing
screws (3).
•
Remove screw (4).
•
Lift combustion chamber cover (5)
off boiler.
•
Check condition of case seal, and
if necessary replace before refitting.
•
Reassemble in reverse order, en-
suring that the cover case is correct-
ly fitted and a good seal obtained.
7.1.6 Lower front control panel
(fig. 60)
•
Remove front casing as in Section
7.1.3,
•
Undo screw (1) and lower control
box forward from top.
7.2 Replacement of fan
•
Isolate the boiler from the electrical
supply.
•
Remove front casing as in Section
7.1.3, and remove combustion
chamber cover as in Section 7.1.5.
•
Disconnect the 2 plug-in fan
connections (1, fig. 7.3).
•
Remove the 2 fan securing bolts
(7, fig. 61).
•
Remove fan inlet restrictor
(3, fig. 61) and fit to new fan.
•
Remove fan.
•
Replace fan mounting gasket
(1, fig. 62) with new gasket sup-
plied with fan.
•
Reassemble in reverse order,
making sure that the 2 fan securing
bolts are fully tightened.
•
Re-fit combustion chamber and front
casing.
•
Carry out electrical checks
(see Section 5.1).
fig. 60
GW 452/0
fig. 61 (Natural Gas)
GW 422/0
fig. 61a (Propane)
GW 1284/0
fig. 59
GW 423/0
