How regulate heat.

Ball bearing in............... AC mode.

Ball bearing out............. heat mode

The ACC dial does "regulate" heat within either mode, but AC to heat is either on or off.

www.**************.com's kit looks pretty cool and Kent is a good guy that is reliable and provides good instructions. I've bought a couple of parts from him in the past and he is a good guy.

I made up my own manual cutoff valve, (actually the maintenance guys at work did it for me) but I'm only going to put it in when my current servo springs a leak.

JCD