Originally Posted by
reciprocal
We have Aaon MAU where I'm working now. Since it's an MAU there is no outside air damper. It's alwaysa pulling 100% outside air. I can understand your frustration with the dampers working in reverse. Let me guess normally...1st stage cooling is 100% outside air then 2ndi stage is compressor removing the heat from 100% return air. In reverse your killing efficiency.
The wiring does leave much to be desired. And why bother with a heat lockout relay when you can just, use a normally closed OAT.