Gas Control Valve Standard Range; Gas Control Valve Hiflo Range - andrews 24/39 Installation And Service Manual

6.5

Gas control valve Standard Range

Fig. 29
6.6

Gas control valve HIflo Range

Issue 2 14/07/16
7. Remove the burner and pilot injectors and clean with
acetone. CLEAN ORIFICES WITH
8. Re-assemble in reverse order but note:
i) The flueways and combustion chamber must be cleaned
first.
ii) Use an approved jointing compound when re-fitting burner
injectors.
9. Light heater in accordance with lighting instructions. All gas
joints must be checked using leak detection fluid. Turn off
and seal any leakages. DO NOT EXAMINE WITH A NAKED
FLAME.
10. Re-light the heater and set the thermostat to the user's
requirements.
The gas control valve should be checked and serviced by a
qualified person, fully conversant with this item.
To remove gas control, first drain appliance, disconnect gas pipe
union and turn control anti clockwise, taking care not to damage
threads, knobs or the valve itself.
The gas control valve should be cleaned and checked. Remove
any debris from the valve inlet filter using a soft brush or by
blowing with low pressure air.
After servicing, check:-
1. Soundness of any gas joints broken or disturbed and seal
any leaks.
2. Burner pressure/gas rate at maximum thermostat setting.
3. Operation of heater is correct. Reset controls to user's
requirements.
Servicing 6
47