AAON M3-094 - Manual (Page 54)

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The ‘Y’ dimension on the blow-through p-
trap should be at least 3.77”, or one inch
plus the calculated static pressure in the
drain pan. The total p-trap height will need
to be 3.77” plus at least .5” and then one
pipe diameter. If the outside diameter of the
p-trap pipe is 1.5” then the total height of the
trap would be 5.77”. A unit with the 6” base
rail would have sufficient height to properly
trap this example unit without additional
accommodations.
Base Drains
Base drains must be either capped or trapped
using the same methods as condensate
drains. If a base drain is to be trapped and
then piped, the trap must be manually filled
before unit operation and periodically
afterwards as the water evaporates.
External Control Panel
Note: The external control panel is heavy.
Installation is a multi-person job.
The optional external control panel may be
shipped loose from the factory. If it is
shipped loose, it is secured for shipping in
the supply fan module.
To install the external control panel use the
following procedure:
1. Remove the external control panel from
the shipping position in the supply fan
module.
2. Install the external control panel by
placing it on the preinstalled mounting
bracket on the exterior of the supply fan
module.
3. While one or two people hold the external
control panel in place on top of the
mounting bracket, another person should
secure it to the wall of the unit with self-
tapping #10 screws through the side angles
and top angles.
4. Push conduit and wiring from inside the
blower cabinet into the external control
panel and connect wiring according to the
provided wiring diagram.
5. Seal the hole in the foam wall by caulking
around the entire perimeter of the conduit on
both the inside and the outside of the unit.
Use an industrial grade silicone sealant or a
duct seal compound.
6. For outdoor units, the top and sides of the
external control panel assembly must be
sealed against the side of the unit. Apply
silicone or polyurethane caulking to the
seam along the top and both sides.
All drains must be trapped
individually before they are
connected to a common line.
CAUTION
All condensate drain connections
must be used. Drain pans are sloped
toward connections.
CAUTION