AIC TEXAS 230, Руководство по установке и обслуживанию

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I-70
H-093630_EN • 00
M
aintenance
Removing and Installing the Fan, Venturi
and Gas Valve Assembly (TEXAS 230)
Conditions:
Tools and material:
î
Wrench, hex head, size 4
î
Wrench, socket head 10
î
Torque wrench, 6 Nm
î
Protective gloves
î
Face mask
î
Loctite thread sealant 577 and 5972
Removal Procedure:
1. Disconnect all connectors and ground wires
from the electrodes, as required, the fan (
1
)
and the gas valve (
5
).
2. Disconnect the compensation hose (
10
) from
the gas valve (
5
) and the air inlet (
7
).
3. Check the hose condition and that it is not
obstructed. Clean as required, or replace
with a new one.
4. Wearing protective gloves and a face mask,
remove insulation from the burner plate (un-
less done previously). Retain for reinstallation
5. Release four screws to release the air inlet
(
7
) flange from the venturi (
3
) flange. Retain
screws for reinstallation. Replace O-Ring (
4
)
as required.
When removing an O-ring, check its
general condition. Discard and replace
the O-ring if it is cracked or torn.
6. Release the screws and washers from the
gas pipe flange (
8
). Retain hardware and
O-ring (
6
), as required, for reinstallation.
The gas valve (
5
) does not need to
be removed from the fan/ventu-
ri assembly (
1
), and the assembly
can be removed as a whole. How-
ever, it is heavy and cumbersome.
Either ask for help to remove the
fan/venturi and gas valve assem-
bly, or remove the gas valve (
5
)
first, as required.
7. Remove the gas valve (
5
), as required, by
releasing four screws and O-ring. Retain
screws and washers for reinstallation. Re-
place O-ring as required.
8. Release four nuts securing the fan/venturi (/
gas valve) assembly (
1
) to the burner plate (
9
).
OFF
i
9. Remove fan assembly (
1
) and fan gasket (
2
)
and retain with hardware for reinstallation.
Discard fan gasket (
2
).
10. Remove the electrodes, as required, refer to
“Removing and Installing the Ignition and
Ionisation Electrodes” on page I-66.
11. Remove the burner, as required, refer to “Re-
moving and Installing the Burner” on page
I-72.
12. Remove the burner plate, as required. Re-
fer to “Removing and Installing the Burner
Plate” on page I-74.
13. Clean the combustion chamber, as required,
refer to “Checking and Cleaning the Com-
bustion Chamber” on page I-76.
Installation Procedure
1. Install fan/venturi (/gas valve) assembly (
1
)
on the burner plate (
9
) with new gasket (
2
).
2. Coat the burner plate (
9
) studs with Loctite
5972 and install retained nuts. Torque in a
crosswise pattern, at 6 Nm.
3. If removed previously, Install gas valve (
5
)
with O-ring and four retained screws and
washers on venturi (
3
). Coat the screws with
Loctite 577 and torque in a crosswise pattern
at 6 Nm.
4. Install O-ring (
4
) on the flange of venturi (
3
) and
connect fan/venturi (/gas valve) assembly (
1
)
to the air inlet flange (
7
).
5. Install with four retained screws, coated with
Loctite 577. Torque at 6 Nm in a crosswise
pattern.
6. Install O-ring (
6
) on gas valve (
5
) and connect
the gas pipe flanged end (
8
) to the gas valve (
5
).
7. Coat the screws with Loctite 577 and torque
in a crosswise pattern at 6 Nm.
8. Connect the compensation hose (
10
) to the
gas valve (
5
) and the air inlet (
7
).
9. Wearing protective gloves and a face mask,
install insulation on the burner plate, unless
the electrodes still require installation.
10. Reconnect all connectors to the electrodes, as
required, gas valve (
5
) and fan (
1
).
Follow-on task(s):
1. Close all panels, refer to “Opening and Clos-
ing the Front Door and Access Panels” on
page I-29.
2. Restart the appliance, as required, refer to
“Restarting after Maintenance” on page
I-62.