Replacement Of Components - Keston 30C Installation And Servicing Instructions

50 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 44.
4. Release the retaining clip and swing the control box down
into its servicing position.
THE BOILER MUST NOT BE OPERATED WITHOUT THE FRONT PANEL FITTED
51 FAN REPLACEMENT
1. Refer to Frame 50.
2. Disconnect the electrical leads from the fan.
3. Undo the gas pipe union connection to the
injector housing.
4. Remove the extended nut retaining the fan
mounting bracket.
5. Lift and remove the fan and venturi assembly.
6. Remove the screw and twist venturi anti-
clockwise to remove 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 'o' ring if evidence of damage or
deterioration is visible.
8. Fit the new fan / venturi assembly ensuring
the retaining tabs are correctly positioned and
the fan outlet sealing gasket is correctly
positioned and free from damage. Refit the
extended nut.
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
Frames 40 & 41.
48
SERVICING
After replacing ANY component check operation of the
boiler, including gas tightness, gas rate and combustion
test.
IMPORTANT.
When work is complete, the front panel 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 80 .
2. In order to replace components in Frames 66-78 it is
necessary to drain the boiler. Refer to Frame 65.
4
8
4
6
3
Retaining Tabs
2
Keston 30C -
Installation and Servicing