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SERVICING
isar + programmer -
Installation and Servicing
61 GAS CONTROL VALVE REPLACEMENT
1.
Refer to Frame 52.
2.
Remove the casing front & bottom panel.
Refer to Frames 44 & 45.
3.
Swing the control box down into the servicing
position. Refer to Frame 46.
4.
Unplug the electrical lead from the gas control
valve and disconnect the earth wire.
5.
Remove the sensing tube from the gas control
valve.
6.
Undo the gas inlet pipe union at the gas
service cock.
7.
Undo the union nut on the outlet of the gas
control valve.
8.
Slacken the screw securing the valve
mounting bracket and withdraw the valve,
complete with bracket and inlet pipe.
9.
Transfer the mounting bracket and gas inlet
pipe to the new gas control valve.
10.
Fit the new gas control valve, ensuring that
any seals showing damage or deterioration
are replaced. Reassemble in reverse order.
11.
Ensure the sensing tube is correctly replaced
and not kinked or blocked in any way.
12.
Check operation of the boiler. Refer to Frame
52.
62 DIVERTER VALVE ACTUATOR REPLACEMENT
1.
Refer to Frame 52.
2.
Remove the casing front & bottom
panel.
Refer to Frames 44 & 45.
3.
Squeeze the tab and unplug the
electrical lead from the valve
actuator.
4.
Rotate the actuator anticlockwise
and pull forward to remove.
5.
Fit new actuator and reassemble in
reverse order.
6.
Check operation of the boiler. Refer
to Frame 52.
2040
Electrical
lead
Tab
Diverter
valve actuator
SER
VICING
202851-1new.pmd
17/11/2006, 07:41
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