I've got a 4 ton Trane xl16i 2 stage system with zone dampers so we are able to have 2 zones, upper and lower. I have a variable speed Trane AH and thermostat by honeywell.
My AH keeps the same speed if 1 or both zones are calling for air, thus resulting in a jet engine sound if only 1 zone is calling for air, but sounding fine when both zones are calling for air. Shouldn't the A/H speed change based on whether 1 or both zones are calling for air?
the tech also told me to always leave the fan in the "on" rather than "auto" positions...does this make sense with 2 zones? wouldn't that by default cause both zones to get cooled air if 1 zone is calling?
Lastly, a friend has the same unit (but only 1 zone) and his tech told him he must use the trane t-stat to work properly. I noticed that trane has a t-stat for 2 stage cooling...would that make a diff?
Thanks in advance