MAINTENANCE INSTRUCTIONS
44
Gas valve
(see fig. 1)
•
Disconnect the joints and remove the gas pipe
connecting the gas valve to the venturi.
•
Disconnect the gas valve ring – nut at the bottom of
the room – sealed chamber back side.
•
Remove the flanged elbow coupling of the existing
valve and fit it to the new valve; also fit a new cork
washer.
•
Replace the gas valve and re-assemble the
components following the above procedure in
reverse order.
•
Replace all the gas seals.
•
Fully tighten the gas connections.
•
Switch on the electricity, water and gas supplies
and carry out gas soundness test.
Electric fan
(see fig. 2)
•
Remove and dismantle the entire burner unit (see
6.6.1 “Cleaning the burner unit”).
•
Use an 8 mm spanner to unscrew the four nuts
securing the electric fan to the gas manifold and
then remove the electric fan, noting the positions of
the washer and diaphragm.
•
Remove the air intake duct, unscrew the two fixing
screws from the venturi and remove the electric fan,
paying particular attention not to damage the cork
gasket.
•
Replace the electric fan and re-assemble the
components following the above procedure in
reverse order.
•
Switch on the electricity, water and gas supplies
and check the soundness of the joint by measuring
the CO
2
levels;
gas valve
Fig. 1
venturi
electric fan
Fig. 2
