Replacing The Gas Valve - IBC SL Series Installation & Operating Manual

Commercial condensing boiler
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3. Remove the cabinet door, and then remove the top cover/lid.
A ladder or step may be required to have a clear vertical view of the work area. Do not
attempt to reach from the front without a clear view, as damage to wires or screws may
occur.
4. Unplug both electrical wires from the gas valve.
5. Remove the 4 bolts
the gas valve out of the way.
6. Examine the gas valve gasket and replace if necessary.
7. Disconnect the electrical wires from the fan.
8. Remove the nuts that attach the fan to the heat exchanger lid.
9. Remove the fan and Venturi mixing device assembly.
10. To separate the Venturi mixing device from the fan, remove the screws and washers.
You should note the position of the Venturi mixing device on the fan before removing it.
11. Examine the fan gasket and replace if necessary.
Installing the new fan
1. Attach the Venturi mixing device to the new fan, ensuring that the fan gasket is well
seated in the groove.
2. Install the new fan and Venturi assembly onto the heat exchanger lid, tightening the four
nuts by hand plus an extra ½ turn. Ensure that the fan gasket is in place (between the
heat exchanger lid and the fan).
3. Reattach the electrical wires to the fan.
4. Ensure that the gas valve gasket is in place before you reattach the gas valve to the fan
and Venturi assembly.
5. Attach the gas valve wires.
6. Open the gas supply, and check for gas leaks.
7. Tune the gas valve.

7.3.2 Replacing the gas valve

Replacing the gas valve on an SL 26-260 G3
For reference, see
Figure 41
that attach the gas valve to the Venturi mixing device, and move
.
82
Section: Service and maintenance

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This manual is also suitable for:

Sl 26-260 g3Sl 40-399 g3

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