SERVICING
25
Mexico Super CF495 - CF4140
-
Installation & Servicing
38 GENERAL
40 PILOT BURNER REPLACEMENT
REPLACEMENT OF PARTS
1.
Refer to Frame 38.
2.
Undo the 2 screws, lift off the front panel and remove the
grille assembly. Refer to Frame 30.
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 4 wing nuts and
withdraw the burner and controls assembly, complete, from
the boiler.
6.
Undo the pilot supply pipe connection and ease clear of the
pilot burner. DO NOT LOSE the pilot injector, which is a
push-fit in the pilot burner housing.
7.
Remove the 2 securing screws and washers, and withdraw
the pilot burner.
8.
Fit the new pilot burner and reassemble in reverse order,
ensuring that:
a.
The injector is in position when refitting the pilot supply.
b.
A gas-tight joint is made.
c.
The spark gap is correct. Refer to Frame 45.
When replacing any component:
1.
Isolate the electricity supply.
2.
Remove the lower front panel and grille
assembly.
3.
Turn off the gas supply at the boiler.
Note.
In order to assist fault finding, the control box PCB is fitted
with 2 indicator lights which represent the following boiler conditions:
Neon
I
3
Mains electricity ON.
Neon SG1
Flashes to indicate ignition operation (stops after
detection.)
For replacement of programmer units refer to the separate
Programmer Kit instructions.
The boiler MUST NOT be operated if the casing is not fitted.
39 SIGHTGLASS REPLACEMENT
1.
Refer to Frame 38.
2.
Unfasten the 2 M5 hexagon nuts and washers.
Remove the assembly from the front plate.
3.
Fit the new sightglass and reassemble, as shown.
4.
Retighten the 2 M5 hexagon nuts to ensure an
airtight seal.
Do NOT overtighten.
SER
VICING
200944-1.p65
3/8/2004, 3:41 PM
25
