52
SERVICING
icos system - Installation and Servicing
77
BOILER SEALING PANEL SEAL REPLACEMENT
1. Refer to Frames 55.
2. Remove the boiler front and sealing panels.
Refer to Frames 47 & 48.
3. Remove the old seal from the casing and
thoroughly clean the casing surfaces.
4. Fit the new adhesive seals, noting that they
are supplied to the correct length for the
relevant sides.
5. Reassemble in reverse order.
Note. Ensure that the boiler sealing panel is
correctly seated, compressing the seal
to make an airtight joint.
6. Check operation of the boiler. Refer to
Frame 55.
76
EXPANSION VESSEL REPLACEMENT
1. Refer to Frame 55.
2. Drain the boiler. Refer to Frame 73.
3. Unscrew all the gas and water connection unions on the
boiler side of the valves.
4. Remove the screw from the turret clamp and remove the
turret.
5. Lift the complete boiler from the wall mounting frame and
place on a flat surface, face down, to expose the expansion
vessel.
6. Unscrew the union nut on the vessel water connection
pipe.
7. Unscrew the 2 screws from the securing clamp and
remove.
8. Remove the expansion vessel.
9. Fit the new expansion vessel.
10. Reassemble in reverse order.
11. Refill the boiler. Refer to Frame 35.
12. Check operation of the boiler. Refer to Frame 55.
Note.
If preferred and for convenience, a new expansion vessel
may be installed else where in the heating system,
providing it ensures equivalent system protection.
SERVICING
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