32
SERVICING
Mexico Super 4100 FF & 4125 FF -
Installation
65 PILOT BURNER REPLACEMENT
1. Remove the 2 screws and lift off the lower front
panel then remove the grille assembly. Refer to
Frame 57.
Undo the gas cock union. Remove the 4 wing nuts
and withdraw the burner and controls assembly,
complete, from the boiler.
2. Disconnect the ignition lead from the PCB.
3. Prise the retaining clip out of the groove in the
electrode, using a small screwdriver, and withdraw
the electrode. Refer to Frame 69.
4. 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.
5. Remove the 2 securing screws and washers, and
withdraw the pilot burner.
6. Fit the new pilot burner and re-assemble 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 69.
1. Remove the 2 screws and lift
off the lower front panel.
Refer to Frame 57.
2. Pull off the thermostat knob.
3. Remove the 2 screws and
pull down the control panel
tabs clear of the top panel.
4. Remove the thermostat phial
from the pocket. Refer to
Frame 57.
5. Remove the bottom screw
and remove the cover.
6. Remove the top screw and
ease the control box off the
control panel.
7. Remove the 2 screws to
release the thermostat
bracket.
8. Disconnect the electrical
leads.
9. Unscrew the thermostat nut to
withdraw the thermostat.
10. Fit the new thermostat and re-
assemble in reverse order.
66 CONTROL THERMOSTAT REPLACEMENT
SER
VICING
