42
SERVICING
Esprit - Installation and Servicing
Gasket
Orifice plate
esp8861
4
2
6
3
52
REPLACEMENT OF COMPONENTS
GENERAL
When replacing ANY component
1. Isolate the electricity supply.
2. Turn off the gas supply.
3. Remove the boiler front panel. Refer to Frame 45.
After replacing ANY component check operation of the boiler,
including gas tightness, gas rate and combustion test.
1. Refer to Frame 52.
2. Drain down the boiler. Refer to Frame 72.
3. Unplug the electrical lead.
4. Unscrew the thermistor.
5. Fit the new thermistor using the sealing washer
provided.
6. Reassemble in the reverse order.
7. Check the operation of the boiler. Refer to Frame 52 .
53
DRY FIRE THERMISTOR REPLACEMENT
54
FAN REPLACEMENT
1. Refer to Frame 52.
2. Disconnect the electrical leads from the fan.
3. Undo the gas pipe union connection to the injector housing.
4. Remove the screw retaining the fan mounting bracket.
5. Remove the fan and venturi assembly. Refer to Frame 47.
6. Unscrew the 3 screws and remove the venturi
assembly, noting the orientation of the venturi in
relation to the fan body.
7. Transfer the venturi assembly to the new fan,
replacing the gasket if evidence of damage or
deterioration is visible.
8. Fit the new fan / venturi assembly.
9. Reassemble the boiler in reverse order, taking care
not to overtighten the screw on the fan mounting
bracket.
10. Check the operation of the boiler. Refer to Frame 52.
IMPORTANT.
When work is complete, the front panel, if removed, must be
correctly refitted - ensuring that a good seal is made.
Notes.
1. In order to assist fault finding, the control panel has an
LED diagnostic display. The key to boiler fault conditions
is shown in Frame 84.
2. In order to replace some components it is necessary to
drain the boiler. Refer to Frame 72.
THE BOILER MUST NOT BE OPERATED WITHOUT THE FRONT PANEL FITTED
nm8766
SERVICING
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