AAON SB series - Duct Connection; Condensate Drain Piping

33
Table 9 – 35 KAIC Fuse Sizing
Table 10 – 65 KAIC Fuse Sizing
Duct Connection
Remove shipping covers and attach duct to
flanges provided on the unit. The installer is
responsible for sealing ducts to the flanges to
prevent water leaks.
Intake air enters the back of the SB Series
unit, where the air filters are located. Size
ductwork in accordance with the ASHRAE
Handbook. Ductwork must be installed in
accordance with NFPA Standard 90A.
When attaching duct to the unit, use a
flexible/compressible material rated for duct
connections. A three inch flexible connector
for both return and supply duct connections
is recommended.
Condensate Drain Piping
Unit is equipped with one condensate drain
pan connection. A p-trap and drain line must
be installed on at least one section’s drain
connection, with the p-trap not to exceed
15.2 cm (6”) from the drain connection. The
lines must be the same pipe size or larger than
the drain connection, include a p-trap, and
pitch downward toward drain. An air break
must be used with long runs of condensate
lines.
Draw-through cooling coils will have a
negative static pressure in the drain pan area.
This will cause an un-trapped drain to back
up due to air being pulled up through the
condensate drain piping.
Condensate drain trapping and piping must
conform to all applicable governing codes.
Note: The drain pan connection(s) is a 2.5 cm
(1”) MPT fitting.
Figure 14 - Drain Trap
The X dimension on the draw-through trap
must be at least equal to the absolute value of
the negative static pressure in the drain pan
plus one inch. To calculate the static pressure
at the drain pan add the pressure drops of all
components upstream of the drain pan,
including the cooling coil, and add the return
35 KAIC Construction
Component Description
Interrupting
Rating (kA)
Fuse
Class CC,
600V, 0.5A - 30A
200
Fuse
Class J,
600V, 35A - 600A
200
Disconnect
3P, 600V, 15A -
600A
35
65 KAIC Construction
Component Description
Interrupting
Rating (kA)
Fuse
Class CC,
600V, 0.5A - 30A
200
Fuse
Class J,
600V, 35A - 600A
200
Disconnect
3P, 600V,
15A - 600A
65
Unit must not be operated without p-
traps. Failure to install a p-trap may
result in overflow of condensate
water.
CAUTION