41
icos
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Installation & Servicing
SERVICING
65 HEAT EXCHANGER REPLACEMENT
Note.
If the installation allows the boiler to be removed from
the wall, the replacement will be more easily conducted if this
is done. This will necessitate disconnection of all services to
the boiler. If this is possible, remove the boiler after step 10.
Refer also to Frame 10, 'Boiler Assembly - Exploded View'.
1.
Refer to Frame 52.
2.
Remove front, bottom and sealing panels. Refer to
Frames 45 & 46 and remove painted side panels.
3.
Remove the control box and place to one side. Refer to
Frame 61.
4.
Attach a length of hose to the drain nipple on the bottom of
the heat exchanger and drain down the boiler.
15.
Remove the pipe cover plate off the boiler top panel.
16.
Pull the flow pipe off the heat exchanger and remove from
the casing.
17.
Remove the two screws retaining the flue manifold
bracket, (screws located on the top panel of the boiler
and the LH side of the flue manifold bracket inside the
boiler). Slide out the flue manifold bracket, then slide out
the plastic flue manifold assembly from the keyhole slots
on the back panel, and remove from the joint at the back
of the sump.
5.
Remove the fan assembly and place to one side. Refer to
Frame 54.
6.
Remove the ignition and detection electrodes. Refer to
Frames 56 & 57.
7.
Remove the spark generator. Refer to Frame 58.
8.
Remove the burner and place to one side. Refer to Frame
55.
9.
Release the flue from the turret.
10.
Remove the turret from the boiler. Refer to Frame 15.
11.
Release the silicon tubing from the sample point.
12.
Release the electrical connections to the dry fire thermistor.
Refer to Frame 64.
13.
Release the electrical connections to the control thermistor
and overheat thermostat. Refer to Frames 53 and 63.
14.
Remove the retaining clip off the flow pipe connection and
cut or disconnect flow and return pipework from the system.
continued .................................
17
17
15
SER
VICING
4
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