I have a CT-80 on a five ton Carrier Infinity. When the system is trying to recover, it only brings the temp down to the two degree difference before switching to low speed. During high load times low speed cannot recover to the temp setting so it continues to run forever. Also it should have a "max run" setting for low speed for just this thing. The Carrier Infinity control thermostat does all of these things but I am on an energy program pilot with my energy provider so they installed this stat. Can I either get the stage setting less than two degrees, or does this have the fast/efficient recovery options of the CT-30?
Here is the example of my scenario:
Daytime set back: 84 degrees
Recovery temp: 78.5 degrees
Stage two runs until about 80 degrees, then switches to low speed.
Low speed cannot recover due to high heat load (central Texas), so the unit runs constantly at 80 degrees. If it were able to cool down to the set temp on high speed the low speed would probably maintain the set temp (which it did with the carrier control)