Replacement Of Components - IDEAL icos system HE15 Installation And Servicing

back

55 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 42.
After replacing ANY component check operation of the
boiler including gas soundness, gas rate and combustion
test.
THE BOILER MUST NOT BE OPERATED WITHOUT THE SEALING PANEL FITTED
56 DRY FIRE THERMISTOR REPLACEMENT
1. Refer to Frame 55.
2. Remove the boiler front and sealing panels. Refer to
Frames 47 & 48.
3. Drain down the boiler. Refer to Frame 73.
4. Unplug the electrical lead.
5. Unscrew the thermistor.
6. Fit the new thermistor using the sealing washer provided.
7. Reassemble in the reverse order.
8. Check the operation of the boiler. Refer to Frame 55.
57 FAN REPLACEMENT
1. Refer to Frame 55.
2. Remove the boiler front and sealing panels. Refer to
Frames 47 & 48.
3. Disconnect the electrical leads from the fan.
4. Undo the gas pipe union connection to the injector
housing.
5. Remove the screw retaining the fan mounting
bracket.
6. Remove the fan and venturi assembly. Refer to
Frame 50.
7. Unscrew the 3 screws and remove the venturi
assembly, noting the orientation of the venturi in
relation to the fan body.
8. Transfer the venturi assembly to the new fan,
replacing the gasket if evidence of damage or
deterioration is visible.
9. Fit the new fan / venturi assembly.
10. Reassemble the boiler in reverse order, taking care
not to overtighten the screw on the fan mounting
bracket.
11. Check the operation of the boiler. Refer to Frame 55.
42
SERVICING
IMPORTANT.
When work is complete, the sealing 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 73.
2. In order to replace components in Frames 65-71 it is
necessary to drain the boiler. Refer to Frame 68.
3
5
ispfu9797
Orifice plate
Gasket
7
Ecl 2373
icos system -
Installation and Servicing
4