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Indoor
Coil
Access
Panel
Fig. 15 — Indoor Coil Access Panel Relocation
Screw
Left
Hood
Side
Hood Divider
Fig. 16 — Economizer Hood Construction
Divider
Cleanable
Aluminum
Filter
Barometric
Relief
Fig. 17 — Economizer Filter Installation
Top
Panel
Rain Deflectors
Top
Panel
Caulk
Here
Indoor
Coil
Access
Panel
Top
Panel
Indoor Coil
Access Panel
Outside
Air
Hood
Filter
Filter
Clip
Step 10 — Install External Condensate
Trap and Line
The unit has one 3/4 in. condensate drain connection on the end of
the condensate pan and an alternate connection on the bottom.
(See Fig. 18.) Unit airflow configuration does not determine
which drain connection to use. Either drain connection can be
used with vertical or horizontal applications.
Condensate Pan (Side View)
Standard
Side Drain
Fig. 18 — Condensate Drain Pan (Side View)
To use the alternate bottom drain connection, remove the red
drain plug from the bottom connection (use a 1/2 in. square
socket drive extension) and install it in the side drain connection.
The piping for the condensate drain and external trap can be com-
pleted after the unit is in place. See Fig. 19.
All units must have an external trap for condensate drainage. In-
stall a trap at least 4 in. (102 mm) deep and protect against
freeze-up. If drain line is installed downstream from the external
trap, pitch the line away from the unit at 1 in. per 10 ft (25 mm in
3 m) of run. Do not use a pipe size smaller than the unit connec-
tion (3/4 in.).
Minimum Pitch
1 in. (25mm) Per
10 ft (3m) Of Line
Base Rail
Open
Vent
To Roof
Drain
NOTE: Trap should be deep enough to offset maximum unit static
difference. A 4 in. (102 mm) trap is recommended.
Fig. 19 — Condensate Drain Piping Details
18
Alternate
Drain
Plug
Bottom Drain
(Factory-installed)
3 in. (76 mm)
Min.
Drain Plug
See Note
Roof
Curb
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