SERVICING
29
Mexico Slimline CF440 -
Installation & Servicing
MEX 2296
5
7
6
5
8
Front
plate
Manifold
44 MAIN BURNER INJECTOR REPLACEMENT
45 GAS VALVE REPLACEMENT
MEX 2276
8
6
7
Gas valve
Manifold
Gas inlet
pipe
'O' ring
'O' ring
1.
Refer to Frame 35.
2.
Remove the 2 screws, lift off
the lower front panel then
remove the grille assembly.
Refer to Frame 29.
3.
Disconnect the electrical leads
from the gas valve.
4.
Disconnect the ignition lead
from the PCB.
5.
Undo the gas cock union.
Remove the 2 wing nuts and
withdraw the burner and
controls assembly, complete,
from the boiler.
6.
Undo the pilot supply
connection.
7.
Undo the manifold securing
nuts and remove the manifold
from the front plate.
8.
Unscrew the burner injector
from the manifold.
9.
Fit the new injector, using an
approved jointing compound,
and reassemble in reverse
order.
1.
Refer to Frame 35.
2.
Remove the 2 screws, lift off the lower front
panel then remove the grille assembly.
Refer to Frame 29.
3.
Disconnect the electrical leads from the
gas valve.
4.
Disconnect the ignition lead from the PCB.
5.
Undo the gas cock union. Remove the 2
wing nuts and withdraw the burner and
controls assembly, complete, from the
boiler.
6.
Undo the pilot at the gas valve.
7.
Unfasten the 4 screws securing the gas
inlet pipe to the LH side of the gas valve.
8.
Unfasten the 4 screws securing the gas
manifold. The 2 sealing 'O' rings should be
discarded and new 'O' rings fitted.
9.
Fit the new gas valve, ensuring that:
a.
The valve is fitted the correct way round -
an arrow engraved on the valve
indicates the direction of flow.
b.
The sealing 'O' rings supplied with the
valve are correctly fitted at the inlet and
outlet flanges.
SER
VICING
200946-1.p65
3/9/2004, 3:40 PM
29
