IBC SL Series Installation & Operating Manual page 85

Replacing the fan on the SL 26-260 G3
For reference, see Figure 41
Removing the fan
1. Turn off the electric power and gas supply to the boiler.
2. Ensure the boiler cools down to the surrounding temperature. Do not drain the boiler unless
freezing conditions are expected during this procedure.
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 connectors or screws
may occur.
4. Disconnect the electrical wires from the fan.
5. Remove the electrical wire from the gas valve.
6. Undo the coupler nut
7. Remove the four nuts that attach the fan to the heat exchanger lid.
8. Carefully remove the fan and Venturi mixing device assembly, and then the fan gasket.
9. Separate the fan from the Venturi mixing device by removing the three screws.
Installing the new fan
1. Attach the Venturi mixing device to the new fan with the screws and washers, ensuring that
the new fan O-Ring is well seated in the groove of the fan.
2. Install the new fan and fan gasket onto the heat exchanger lid, and secure with the four nuts.
3. Secure the gas valve to the Venturi mixing device with the coupler nut
gasket is in place.
4. Reattach the electrical wires to the gas valve and fan.
5. Open the gas supply, and check for gas leaks.
6. Tune the gas valve.
Replacing the fan on the SL 40-399 G3
For reference, see Figure 42
Removing the fan
1. Turn off the electric power and gas supply to the boiler.
2. Ensure the boiler cools down to the surrounding temperature. Do not drain the boiler unless
freezing conditions are expected during this procedure.
.
, and retain the gasket.
.
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7.3.1 Replacing the fan
, ensuring that the