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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 compression nut on the gas
feed pipe to the injector (see
Figure 67
).
2. Undo the valve securing screw/s and
disengage the gas feed tube out of the
injector.
3. Remove the four venturi housing
securing nuts and lift off the housing.
4. Unscrew the injector securing nut from
inside the venturi housing and remove
the injector.
5. Replace in reverse order ensuring that
the replacement jet size (marked on the
jet) is as given on the data badge.
Ensure that the fibre sealing gasket is
replaced.
Venturi Housing
Injector
Compression nut
Gas Feed from Valve
Venturi Housing
Securing Nuts
Figure 67
4.3.3. Control Valve Replacement (BM and Mertik GV34)
1. Disconnect the pilot feed pipe, the gas
inlet and outlet pipes 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 valve securing screw/s and
withdraw the valve.
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