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34
8.8.5
Unscrew and Gently Remove combustion
chamber cover assembly with gas
valve, fan ,burner and electrodes from
combustion chamber.as in sect. 7.2.2
8.8.6
Remove the three screws, which fix the
gas valve and venturi plate at the fan
8.8.7
Remove the gas valve
8.8.8
Replace in reverse order.
8.8.9 IMPORTANT :
When gas control valve
will be re -fitting,
check combustion CO
2
and
adjusted if necessary
see section 6.10
8.8
TO REMOVE/REPLACE GAS CONTROL
VALVE AND OR VENTURI PLATE .
(Fig.58).
8.8.1
Remove front casing (sect 8.1.4).
8.8.2
Drop down the control panel into the
service position.
8.8.3
Unplug plastic plug from the DC fan
supply and
u
nscrew the gas valve from
gas pipe inlet
8.8.4
Remove the electrical plug from the gas
control valve.
Check the position of the gas valve on the
fan
Fig.58
8.9
TO REMOVE/REPLACE COMBUSTION
CHAMBER FRONT INSULATION
(Fig.60).
8.9.1
Remove front casing (sect 8.1.4).
8.9.2
Remove fan,gas valve and burner
assembly as in sect.7.2.2.
8.9.3
Remove burner and spark/sensing
electrodes and replace in reverse order
NOTE: THE BURNER WILL REQUIRE
A NEW GASKET.
8.10
TO REMOVE/REPLACE COMBUSTION
CHAMBER REAR INSULATION .
8.10.1
Remove front casing (sect 8.1.4).
8.10.2
Remove fan,gas valve and burner
assembly as in sect.7.2.2.
8.11 TO REMOVE/REPLACE VIEWING
GLASS. (Fig.61).
8.11.1
For access ref. sect. 8.9 (fig60).
8.11.2
Remove the two screw that securing view
glass bracket
8.11.3
Remove view glass .
8.11.4
Remove gasket .
8.11.5
Replace in reverse order.
8.10.3
Remove securing screw and washer
in the center of the insulation and
withdraw insulation.
8.10.4
Reassemble in reverse order.