Gas Pressure Adjustment; Replacement Of Parts - IDEAL Henrad WH LX 30 FF Installation And Servicing Manual

53 GAS PRESSURE ADJUSTMENT

PILOT
The pilot is factory set to maximum and no further
adjustment is possible. If, after removing and checking the
injector (as detailed in Frame 58) and ensuring that there is
an inlet pressure of 20 mbar available, the pilot does not
light then contact Caradon Plumbing Limited.
Relight in accordance with 'Initial Lighting', Frame 43.
54 GENERAL
When replacing any component:
1. Isolate the electricity supply.
2. Turn OFF the gas supply.
3. Remove the boiler casing. Refer to Frame 48.
IMPORTANT. When work is complete the casing must
be correctly refitted, ensuring that a good seal is made.
55 SIGHTGLASS REPLACEMENT
1. Refer to Frame 54.
2. Unfasten the 2 nuts and washers holding the sightglass
assembly to the casing front panel.
3. When fixing the new assembly ensure that the parts are in
the correct order. The frame must have the return edge at
the bottom.
4. Retighten the 2 nuts to ensure an airtight seal. Do NOT
overtighten.
6. Replace the boiler casing. Refer to Frame 52.
Note. Standard model illustrated. For the deluxe model (LX) slide
the glass fascia out before removing the sightglass assembly.
Refit the glass fascia after refitting the new sightglass assembly.
56 OVERHEAT THERMOSTAT REPLACEMENT
Refer to Frames 37, 54 & 70.
1. Remove the control box fixing screw.
28
SERVICING

REPLACEMENT OF PARTS

2. Pull the box forward and
downward to disengage.
3. To remove the overheat
thermostat pull off the
electrical connections at
the thermostat. Remove
the backnut retaining the
thermostat to the bracket.
Remove the thermostat
from the heat exchanger
pocket.
4. Re-assemble in reverse
order.
MAIN BURNER
After any servicing, reference should be made to Table 2
which quotes details of the rated output with the related
burner setting pressure and the heat input. Any required
adjustments should be made by using the pressure
adjustment screw.
Refer to 'initial Lighting', Frame 43.
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 I3. Mains electricity ON.
Neon SG1. Flashes to indicate ignition operation (stops after
detection).
The boiler MUST NOT be operated if the casing is not fitted.
Henrad WH LX -
FF, FF
Installation