AAON M3-094 - Manual (Page 52)

52
Blow-Through P-Trap Example
Figure 27 - Blow-Through Drain Pan Connection Locations
In this case the supply external static
pressure is 3”. The only components
between the drain pan and the supply-air
ductwork are the discharge opening and the
heating coil. To find the static pressure in
the drain pan, subtract .08” and .15” from
the 3” supply air external static pressure.
This gives a positive pressure in the drain
pan of 2.77”. These values are listed on the
Unit Rating Sheet which can be obtained
from the AAON sales representative.