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REPLACEMENT OF PARTS - Page 13
h.
Test for gas soundness as follows:-
-
Ensure the water service cock is in the OFF
position. This will ensure water cannot flow and
open the automatic valve.
-
Turn ON the gas, purge and light the pilot, this will
pressurise the burner supply pipe.
-
Test the gas supply to flame safety device and
burner supply pipe above the flame safety device for
gas soundness using leak detection fluid.
i.
Re-assemble remaining parts and ensure the water
service cock is in the ON position.
6.6.
TO DRAIN THE APPLIANCE
a.
Ensure that the gas and water service cocks are turned
OFF.
b.
Open a hot water outlet.
c.
Have a suitable container to hand . Remove the drain
screw from the water service cock and allow the water
to drain.
6.7.
WATER GOVERNOR
a.
Gain general access - see 6.2.
b.
Drain the appliance - see 6.6.
c.
Release the inlet water connection and lower the
pipework to clear the inlet.
d.
Release the union nut and clamping plate then remove
the feed pipe. Replace the 'O' ring.
Pilot
Fig. 23
Gas Service Cock
A
Off
Water Service Cock
Off
B
Fig. 24
Water Inlet
Connection
Fig. 25
Thermocouple
Fixing Screw
Electrode
On
Water Service Cock
Drain Screw
Off
Union Nut
Cla m p ing Plate
Water Governor
C
D
E
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