25
Mexico Slimline RS 3/40 & 3/50 -
Installation
34 GENERAL
1.
Disconnect the ignition lead from the piezo
unit body.
2.
Remove the retaining nut securing the
body to the bracket and withdraw the unit,
as shown.
3.
Fit the new unit and reassemble in reverse
order.
36 PIEZO UNIT REPLACEMENT
REPLACEMENT OF PARTS
SER
VICING
When replacing any component:
1.
Isolate the electricity supply.
2.
Turn off the gas supply at the boiler.
3.
Remove the lower front panel.
For replacement of programmer units
refer to the separate Programmer Kit
Instructions.
35 SIGHTGLASS REPLACEMENT
1.
Unfasten the 2 wing nuts and washers. Remove the assembly from the
front plate.
2.
Fit the new sightglass
and re-assemble in the
correct order (i.e. gasket,
glass, gasket and
frame), as shown.
3.
Retighten the 2 wing
nuts to ensure an airtight
seal.
Do NOT
overtighten.
SERVICING
37 PILOT BURNER REPLACEMENT
1.
Lift off lower front panel and remove the grille
assembly - refer to Frames 28 & 29. Undo the gas
cock union. Remove the burner assembly.
2.
Remove the ignition electrode. Refer to Frame 42.
3.
Unscrew the thermocouple nut and pull the
thermocouple clear.
4.
Undo the pilot supply pipe nut 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.
7.
Refit the thermocouple and electrode,
reassembling in reverse order.