fan delay on make timer to help start up for ac generator

That would be great. But, I don't think it is what the OP is suggesting.

I don't have a wiring diagram for the unit. He either needs to match the voltage to the thermostat voltage and interupt that, or match the votage and amperage of the wire he is suggesting to interrupt.

When I installed something similar, I did it on the (remote) thermostat wire. I really don't know what is available considering his themostat is built into the distribution box on the unit.