[westernhvac]

Hello everybody.
I am looking at a Lennox HarmonyIII 4 zone board. I have determined that I can definitely run a Hybrid system off of this board and it currently has a two stage AC installed. I want to run a two stage heat pump, but in reading through the install instructions it seems to mention two stage ac's but only single speed heat pumps. Any of you Lennox guys know if I can run a two stage heatpump on this board with a gas furnace?

[flashheatingand]

I don't see a whole bunch of fellas replying so here goes it. Is there a way to make it work? yeah, but my guess is that they are designed to for single stage h/p. so energize the y & y2. It's easy to say when you don't have the real job at hand. Heck, you probably already have it figured out anyhow. What's the answer?

[westernhvac]

Thanks Flash. I didn't really figure it out, but I did decide on a course of action. Too much risk on the two stage, went with a single stage. The system is using propane as their furnace fuel anyway and their existing ac is only a couple of years old.

I'm just glad alot of people didn't answer and call me an idiot