IBC SL Series Installation & Operating Manual page 72

To perform a fuel conversion on an SL 26-260 G3:
Removing the Venturi mixing device
1. Before you disconnect the electrical power, ensure that the gas supply is turned off at
the gas shut-off valve.
2. Change the gas fuel source.
3. Remove the front door cover and the top cover/panel. To view the gas valve
components for the SL 26-260 G3, see
on page 79.
4. Undo the brass coupling nut between the gas valve and the Venturi mixing device.
5. Move the gas valve to the side.
6. Note the orientation and the positions of the Venturi mixing device Hex bolts.
7. Remove the bolts and the Venturi mixing device from the fan.
8. Ensure that the fan O-Ring is not damaged and is seated in the groove.
Installing the new Venturi mixing device
1. Install the new fuel-appropriate Venturi mixing device with the Hex bolts.
2. Check that the gasket is in place between the gas valve and the Venturi mixing device.
3. Connect the gas valve to the Venturi mixing device using the brass coupler nut.
4. Place the conversion labels associated with the new fuel onto the boiler.
5. Turn on the gas supply and connect the electrical power.
6. Check for gas leaks.
7. Tune the gas valve (see
To perform a fuel conversion on an SL 40-399 G3:
Removing the Venturi mixing device
Note
If a downturned elbow is installed on the old venturi, it should not be transferred
to the new venturi.
1. Before you disconnect the electrical power, ensure that the gas supply is turned off at
the gas shut-off valve.
2. Change the gas fuel source.
3. Remove the front door cover and the top cover/panel. To view the gas valve
components for the SL 40-399 G3, see
on page 80.
4. To remove the four bolts of the gas valve-gas valve elbow, use an Allen key.
5. Separate the gas valve from the elbow, and retain the O-ring.
Gas valve and fan components - SL 26-260 G3
Adjusting the gas valve on page
Gas valve and fan components - SL 40-399 G3
68
Section: Boiler operation
69).