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8.5 TO REMOVE/REPLACE THE BURNER
(FIG.57)
8.5.1
Remove front casing (sect. 8.1.4).
8.5.2
Unscrew and Gently Remove combustion
chamber cover assembly with gas valve,
fan ,burner and electrodes from combustion
chamber.as in sect. 7.2.2
8.5.3
Remove the four screws that secure the gas
manifold and carefully pull out the burner.
IMPORTANT:
THE BURNER WILL REQUIRE
A NEW GASKET WHEN REFITTED.
8.5.4
Replace in reverse order
8.6
TO REMOVE/REPLACE THE HEAT
EXCHANGER
8.6.1
Remove front casing (sect 8.1.4).
8.6.2
Unscrew and Gently Remove combustion
chamber cover assembly with gas valve,
fan ,burner and electrodes from combustion
chamber as in sect. 7.2.2.
8.6.3
Drain the boiler CH circuit and
drain the DHW circuit .
8.6.4
Remove the clip securing the condense
pipe out of the bottom of the heat
exchanger and pull for to remove the pipe
8.6.5
Remove the clips securing the flow and
return pipes at the heat exchanger.
8.6.6
Unscrews the two nuts that fix the pipes at
diverter valve and pump and move away
from the heat exchanger.
8.6.7
Loosen the three heat exchanger securing
screws and clamps remove the heat
exchanger.
CAUTION :
There will be water in the heat
exchanger
8.6.8
Carefully ease heat exchanger out.
Replace in reverse order, always use a new
oring seals.
8.7
TO REMOVE/REPLACE THE IGNITION
CONTROL BOX .
8.7.1
Remove front casing (sect 8.1.4).
8.7.2
Remove ignition and sensing leads and
electrical connections.
8.7.3
Remove the two fixing screws that fasten
the ignition control box at the depression
chamber.
8.7.4
Replace in reverse order.
Ensure correct wire position.
Fig.57
