There is not a simple software way of doing this, but there is a way. Wire the output of the variable through a relay before it goes to the fan. (L1 goes to one VAR terminal, the second VAR terminal goes to the relay, and then the second relay ...
Some equipment may still operate at a very low value at 0 percent. Use the disconnect relay to fully cut off the power to the equipment and ensure that 0 percent means fully off. See Connect Equipment in the user manual for more information.
If for some reason you want to prevent the alarm relay on the AFX from setting off a separate alarm it is wired to when the relay goes off, you would make the change shown below:
Problem Relay not operating load Possible Cause Possible Solution Incorrect wiring Correct the wiring. Switch-on setting for stage incorrect Adjust the setting. Relay set to cool for a heater Relay set to heat for a fan No power to load Switch on the ...