Followup to orig post:

The heatpump is single stage. We will only be using it to heat. No A/C.

Thermostat needs to

1. start open water supply solenoid
2. start compressor
3. start circulation pump moving water through floor tubes

you got me lost brother, and I don't get lost much.

you are going to use the water source heat pump for heating your floor?

what are you going to do with the cold air the water source heatpump produces?

normally you would use a boiler to heat conditioned water for your floor. If you use well water in your floor the radiant floor tubing isn't going to last.

With a Water source heatpump if you heat the water you cool the air.

When you heat the air you cool the water.

maybe I just miss understood your question