AIC COILMASTER 100, Installation And Maintenance Manual For The Installer And The User

Page: 64 / 94

I-64
G-084383_EN • 03
M
aintenance
Removing and Installing the Fan and Air-
Gas Mixer Assembly
Conditions:
Tools and material:
î
Wrench, hex head, size 5
î
Wrench, flat
î
Torque wrench
î
Protective gloves
Removal Procedure:
The picture illustrates the CM 100-
120 appliance, but the removal
principle is identical for models
CM 60, 70 and 80.
1. Disconnect all connectors and ground wires
from the electrodes, as required, the fan and
the gas valve (
3
).
2. Wearing protective gloves, remove rock wool
insulation from the upper plate (unless done
previously). Retain for reinstallation
3. Release the hose clamps and disconnect the
compensation hose (
7
) from the gas valve
(
3
) and the flue box (
8
). Retain hardware for
reinstallation.
4. Check the hose (
7
) condition and that it is
not obstructed. Clean as required, or replace
with a new one.
5. Disconnect the air inlet duct (
1
) from the air-
gas mixer.
6. Release gas pipe connection (
2
) from the gas
valve (
3
).
7. Release the screws and washers (
4
) securing
the fan assembly (
5
) to the burner door.
8. Remove the assembly (
5
) formed by the fan,
the air-gas mixer and gas valve. Retain for
reinstallation.
9. Remove the fan gasket (
6
) and retain, as re-
quired, for reinstallation.
When removing the gasket, check
its general condition. Discard and
replace the gasket if it is cracked or
torn.
OFF
i
i
10. Remove the electrodes, as required, refer to
“Removing and Installing the Ignition and
Ionisation Electrodes” on page I-63 .
11. Remove the burner, as required, refer to
“Removing and Installing the Burner -
CM 100 - 120” on page I-68 .
12. Clean the combustion chamber, as required,
refer to “Checking and Cleaning the Com -
bustion Chamber” on page I-70.
Installation Procedure
1. Install the fan assembly (
5
) with a new gas-
ket (
6
) (if required) on the burner door, using
three retained screws and washers (
4
).
2. Torque the screws (
4
) at 4 Nm.
3. Connect the gas pipe (
2
) to the gas valve (
3
)
4. Connect the air inlet duct (
1
) to the air-gas
mixer.
5. Connect the compensation hose (
7
) to the
gas valve (
3
) and the flue box (
8
). Tighten
both extremities using retained clamps.
After installing the compensation
hose, make sure that the clamps
are correctly tightened at both
ends. An accidental disconnection
during boiler operation can cause
injuries.
6. Wearing protective gloves, install insulation
on the upper plate, unless the electrodes still
require installation.
7. Reconnect all connectors to the electrodes,
gas valve (
3
) and fan.
Follow-on task(s):
1. Close all panels, refer to “Removing and In -
stalling the Access Panels” on page I-31.
2. Restart the boiler, as required, refer to “Re -
starting after Maintenance” on page I-60 .