38
xtra
-
Installation & Servicing
SERVICING
52 GAS VALVE REPLACEMENT
1.
Refer to Frame 42.
2.
Remove the jacket front, inner front and
control fascia panels. (Refer to Frame 45).
3.
Remove the 4 screws securing the controls
fascia support bracket and withdraw.
4.
Disconnect the electrical connections from
the gas valve.
5.
Release the securing clip and disconnect
the pressure sensing tube from the gas
valve.
6.
Whilst providing temporary support for the
inlet gas pipe, remove the 4 screws
securing the inlet flange.
7.
Whilst providing temporary support for the
gas valve, remove the 4 screws securing the
gas valve outlet.
8.
Withdraw the gas valve taking care to retain
the inlet and outlet O rings.
9.
Re-assemble in reverse order. Re-secure
the clip over the pressure sensing tube
using pliers to apply the grip. Replace gas
valve inlet/outlet O rings if showing signs of
wear.
10.
Refer to instruciton sheet with spare gas
valve for correct setting procedure.
11.
Refer to Frame 42 for final safety checks.
53 AIR PRESSURE SWITCH REPLACEMENT
1.
Refer to Frame 42.
2.
Remove the jacket front and inner front panels. (Refer to Frame
45).
3.
Remove the 2 electrical connections from the air pressure switch
(no polarity) which is located at the top rear of the main control
panel.
4.
Release the securing clips and disconnect the pressure sensing
tubes.
5.
The air pressure switch can now be unclipped from its supporting
cradle.
6.
Re-assemble in reverse order. Connect the sensing tube from the
T-piece to P1 and the sensing tube from the gas valve outlet elbow
(F80-F120) or venturi gas valve connections (F160-F280) to P2.
7.
Refer to Frame 42 for final safety checks.
Pressure
sensing
tubes
6
7
F160-F280
5
4
F80-F120
Left and right terminals
(no polarity)
4
7
5
5
SER
VICING
