38
SERVICING
isar -
Installation and Servicing
59
GAS CONTROL VALVE REPLACEMENT
1. Refer to Frame 50.
2. Remove the casing front & bottom panel.
Refer to Frames 42 & 43.
3. Swing the control box down into the servicing position.
Refer to Frame 44.
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 50.
60
DIVERTER VALVE ACTUATOR REPLACEMENT
1. Refer to Frame 50.
2. Remove the casing front & bottom panel.
Refer to Frames 42 & 43.
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 the new actuator and reassemble in reverse
order.
6. Check operation of the boiler. Refer to Frame 50.
2040
Electrical
lead
Tab
Diverter
valve actuator
58
SPARK GENERATOR REPLACEMENT
1. Refer to Frame 50.
2. Disconnect the leads from the spark generator and
bracket.
3. Remove the M5 screw securing the spark generator
bracket to the flue casting.
4. Remove the 2 M4 screws securing the spark generator to
the bracket.
5. Fit the new spark generator and re-assemble in reverse
order.
6. Check operation of the boiler. Refer to Frame 50.
SER
VICING
