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SECTION 3 - SERVICING
3.14 GAS CONTROL VALVE REPLACEMENT
1.
Refer to Section 3.8.
2.
Unplug the electrical lead connection from the gas
control valve and disconnect the earth wire.
3.
Remove the outlet gas valve clip and slide the pipe
upwards.
4.
Undo the gas inlet pipe union at the inlet to the gas
control valve.
5.
Undo the single screw fixing the gas valve to the
mounting bracket and withdraw the valve forwards.
To gain access, temporarily move the seal.
6.
Fit the new gas control valve, ensuring that
the ‘o’ ring and sealing washer are in place.
Replace screw and re-connect gas and electrical
connections.
Ensure sealing washer is fully
located.
7.
Ensure all gas valve connections are gas tight with
a gas soundness check up to the gas control valve.
8.
Check operation of the boiler.
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3.15 DIVTERTER VALVE ACTUATOR REPLACEMENT
Refer to Section 3.8.
To remove the motor:
1. Remove the condensate trap/siphon. Refer to
Section 3.16.
2. Place a flat bladed screwdriver in the actuator
slot provided and ease out the actuator.
3. Before replacing the diverter valve actuator
proceed as follows:
a. Ensure that the switched live to the boiler is
off and that all DHW taps are shut and that
pre-heat is switched off.
b. Press and hold the “PREHEAT”
and
“RESTART”
buttons together for more than
5s, the last 3 faults will then be shown in
sequence before “SL” is shown
c. Press “PREHEAT”, “SH” will be shown
d. Press “PREHEAT”, “UF” will be shown
e. Press “PREHEAT”, “DU” will be shown
f. Press “RESTART” and the diverter valve will
move to the mid-position
4. Fit the new motor ensuring the arm is correctly
engaged in the metal fork and re-assemble in
reverse order ensuring the condensate trap/
siphon is refilled with water.
5. Check the operation of the boiler.
Note.
All spares will be delivered in mid-position
therefore ignore point 3 and proceed to point 4.
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