Replacement Of Components; Dry Fire Replacement; Fan Replacement - IDEAL istor HE260 Installation And Servicing

63 REPLACEMENT OF COMPONENTS

GENERAL
When replacing ANY component in the boiler module.
1. Isolate the electricity supply from both the boiler and the
immersion heater. N.B: The immersion heater should be
supplied from a separate suitably rated electrical supply
fused at 13 amps.
2. Turn off the gas supply.
3. Remove the boiler front panels. Refer to Frame 53.
4. It may be necessary to remove the DHW expansion vessel.
Refer to Frame 55.
THE BOILER MUST NOT BE OPERATED IF THE SEALING PANEL IS NOT FITTED

64 DRY FIRE REPLACEMENT

1. Refer to Frames 53 & 54.
2. Remove the boiler front and sealing panels. Refer to
Frame 56.
3. Drain down the boiler. Refer to Frame 85.
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 49.

65 FAN REPLACEMENT

1. Refer to Frame 53 & 54.
2. Remove the boiler sealing panel. Refer to Frame 56.
3. Disconnect the electrical leads from the fan.
4. Undo the gas pipe union connection to the injector housing.
5. Remove the retaining screw and pull off the mounting bracket.
6. Remove the fan and venturi assembly.
7. Remove the 3 retaining 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. Re-assemble the boiler in reverse order taking
care not to overtighten the single retaining screw
on the fan mounting bracket.
11. Check the operation of the boiler. Refer to Frame 49.
istor system store -
Installation and Servicing
SERVICING
After replacing ANY component check operation of the boiler
including gas tightness, gas rate and combustion test.
IMPORTANT.
When work is complete, if the sealing panel has been
removed, it 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 96.
2. In order to replace most of the components in Frames 64
to 95 it is necessary to drain the boiler or cylinder. Refer
to Frames 85 & 86.
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