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4.3. Replacing Parts
For any spare parts that are required, please contact either your supplier or the manufacturer
directly. You will need the model name i.e. model number, the gas type, the type of control
and serial number.
Only approved parts should be used.
4.3.1. Pilot Assembly Replacement
NOTE:
If any part of the pilot assembly becomes faulty then the whole pilot
assembly will need changing.
1. Remove the HT lead from the end of the
electrode.
2. Cut the cable tie wrap.
3. Using
M9
spanner
undo
the
thermocouple connection from behind
the control valve
4. Using M10 spanner undo the pilot feed
pipe nut at the pilot assembly.
5. Remove the pilot lint guard and undo the
pilot assembly securing screws and
withdraw the pilot assembly.
6. Refit in reverse order ensuring that the
lint guard is fitted.
4.3.2. Injector Replacement
1. Undo the two compression nuts on the
gas feed pipe to the injector elbow/s and
remove the pipe.
2. Loosen the M5 grub screw/s securing
the injector elbow/s into the venturi boss
and withdraw the injector elbow/s.
3. Replace in reverse order ensuring that
the replacement jet size (marked on the
jet) is as given on the data badge.
4.3.3. Control Valve Replacement (BM or Mertik GV34)
1. Disconnect the pilot feed pipe, the main
gas feed pipe and the thermocouple
connection from the back of the valve.
2. Pull out the HT lead connection from
under the electrode and cut the cable tie
wrap.
3. Remove the two valve securing screw/s
and withdraw the valve.
4. Refit the new valve in reverse order
ensuring that the valve spacers (on
Mertik valve) are in place.
5. Roll up the excess length of HT lead and
secure it to the rolled up thermocouple
cable with a new tie wrap.
