Specifications

8.21 Change of
pilot gas
filter
Remove
pilot gas
line from the
pilot gas
filter by
disconnecting
the union
nut
(G6).
Unscrew
the
pilot gas
filter from the
gas
section.
Reassemble
in reverse order, using suitable
sealing compound sparingly.
Check connections
for
gas
soundness.
8.22 Change
of automatic
valve
stuffing box
Disconnect the differential valve as under
8.6.
Control lines remain connected. Unscrew the
stuffing
box
(G7),
taking care not to bend the
oin. Reasemble
in reverse
order. usino
new
wasner.
Check connections
for
gas
soundness.
8.23 Change of switch
box
lsolate
the appliance from
the electrical
mains.
Mark
the
pilot
lines,
disconnect
the tubing nuts
and
remove
oilot
lines.
Pull the thermocouple
out of the
pilot
burner
assembly
and unscrew
the retaining union
nut
(82)
from the switch
box.
Remove the 2 retaining screws
(Bl)
and
pull
out
the switch box.
Note
the colour codes
of
the
wiring and
pull
the AMP
plugs
from the micro
switches.
Reassemble in reverse order.
Check
-
earth continuity
-
polarity
-
resistance to
earth
according
to INSTRUCTIONS FOR BRITISH
GAS MULTIMETER.
Check connections for
gas
soundness.
40
v