Originally Posted by
Jerry Peck
Brent,
To keep air from moving into, or out of, the AHU.
What happens in the middle of January, when the trap has dried out? I think Jim L. has mentioned priming it with mineral earl (oil)..?
Originally Posted by
Jerry Peck
If the AHU is a blow through style, it will blow air out through those condensate lines unless there is a trap sufficiently deep enough to resist the static pressure.
Likewise for AHU which as suck through, except that they will suck air in (instead of blowing air out).
I think its also known as the positive and negative pressure side(s).