I have a Luxaire HL8B048F1 heat pump with electric backup heat. My house is set up for two zones and my zone controller is a Robertshaw 2701-006. I have two Honeywell Visionpro 8000 thermostats.
My auxiliary heat is coming on too soon, sometimes at 4 deg c. I tried installing an outdoor temp sensor and hooking it to my main zone thermostat, but I can only display outside temperature and I am not able to lock out my aux. heat.
In the introduction of the manual to the zone controller says: "Slimzone is compatible with both single stage heating and cooling units and single compressor heat pumps with auxiliary heat".
Is this zone controller compatible with my two stage heat pump? Or is it only allowing the first stage to engage?