31
SERVICING
Mexico Super 4100 FF & 4125 FF -
Installation
2. Main Burner Pressure
After servicing, reference should be made to Table 1,
which quotes details of the output with the related
burner pressure and heat input. Any required
adjustments should be made using the pressure
adjustment screw. Refer to Frame 53 - Initial Lighting.
Refit the lower front panel and secure with the 2 fixing
screws.
REPLACEMENT OF PARTS
63 GENERAL
When replacing any component:
1. Isolate the electricity supply.
2. Turn OFF the gas supply.
3. Remove the lower front panel and grille assembly.
Note.
In order to assist fault finding, the control box printed
circuit board 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).
1. Unfasten the 2 M5 hexagon nuts and washers.
Remove the assembly from the front plate.
2. Fit the new sightglass and re-assemble, as
shown.
3. Retighten the 2 M5 hexagon nuts to ensure an
airtight seal.
Do NOT overtighten.
61 RE-ASSEMBLY
62 GAS PRESSURE ADJUSTMENT
1. Pilot Pressure
Pilot adjustment is factory set to maximum and no
adjustment is possible.
64 SIGHTGLASS REPLACEMENT
Re-assemble the boiler in the following order:
1. Refit the flue baffles.
2. Inspect the collector hood rope gasket and replace, if
necessary, ensuring that the self adhesive rope is fitted
centrally on to the lip of the collector hood / fan assembly.
The boiler efficiency will be adversely affected if incorrectly
fitted. Refit the collector hood cover with the 4 screws.
Tighten the screws. Ensure that the sealing gasket is
compressed. Refit the pressure pipe.
3. Refit the positive pressure tubes on the top of the fan
housing. Reconnect the electrical leads.
4. Refit the burner assembly.
5. Reconnect the gas supply and the electrical wiring.
Refer to Frames 39 & 48.
7. Check for gas soundness. Check the gas service
cock and pressure test point.
8. Refit the boiler casing (Refer to Frame 51).
9. Refit the lower front panel and secure with the 2
fixing screws.
The boiler MUST NOT be operated if the casing is not fitted.
SER
VICING