Glow-worm 24-38CXI Range - Manual (Page 47)

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14 Replacement of Parts
Diagram 14.22
DRAIN
POINT
RETAINING
CLIP
12774
14.30 Central Heating Filter
Refer to section 12.8.
Fit new 'O' rings.
14.31 Heating Circuit Drain Point
Refer to section 12.9 to drain the boiler heating circuit.
Refer to diagram 14.22.
Remove the retaining clip to remove the drain point.
Fit new 'O' rings.
Replace the drain point, refill, vent and pressurise the boiler.
Check for leaks.
14.32 Inner Casing Panel Seal
For access, refer to section 14.1.
Refer to diagram 12.11.
Remove the inner casing panel.
To replace remove the old seal, thoroughly clean the casing
surfaces. Fit the new seal, it is supplied to the correct length.
Refit the inner casing panel.
NOTE: Ensure the seal is fitted correctly giving an airtight joint.
14.33 Plate-to-Plate Heat Exchanger
For access, refer to section 14.1.
Refer to section 12.9 to drain the boiler heating circuit.
Refer to section 12.10 and drain the boiler hot water circuit.
Refer to diagram 14.23.
Remove the gas supply pipe from the gas service cock and the
gas valve, refer to relevant parts of section 12.3.
Undo the central heating flow pipe connection into the left hand
hydroblock, see diagram 14.23.
Undo the nut connecting flow pipe to heat exchanger, see
diagram 14.15.
Lift it up to remove it from the hydroblock with the washer and
rotate it forward and out of the way.
Using a TORX screwdriver remove the two screws securing the
plate-to-plate heat exchanger to the hydroblock.
Remove the plate-to-plate heat exchanger by lifting it up and
over the top of the left hand hydroblock.
When replacing the plate-to-plate heat exchanger ensure that
the four rubber sealing washers are fitted into the hydroblock.
NOTE: The plate-to-plate heat exchanger only fits one way
round, 'TOP' is marked on the plate.
Refill, vent and pressurise the boiler.
Open the cold-water isolation valve and slowly open a hot water
tap to remove air.
Close the hot water tap and check for any leaks.
Open the heating circuit isolation valves, re-pressurise the
system as necessary.