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LEFT
HOOD
SIDE
19 1/16"
B
(483mm)
HOOD DIVIDER
Fig. 18 — Economizer Hood Construction
3.
Remove the shipping tape holding the economizer baro-
metric relief damper in place (economizer only).
4.
Insert the hood divider between the hood sides. See
Fig. 18 and 19. Secure hood divider with 2 screws on each
hood side. The hood divider is also used as the bottom fil-
ter rack for the aluminum filter.
5.
Open the filter clips which are located underneath the
hood top. Insert the aluminum filter into the bottom filter
rack (hood divider). Push the filter into position past the
open filter clips. Close the filter clips to lock the filter into
place. See Fig. 19.
6.
Caulk the ends of the joint between the unit top panel and
the hood top.
7.
Replace the filter access panel.
DIVIDER
CLEANABLE
ALUMINUM
FILTER
BAROMETRIC
RELIEF
Fig. 19 — Economizer Filter Installation
Step 9 — Units with Hinged Panels Only
Relocate latch shipped inside the compressor compartment be-
hind the hinged compressor door to location shown in Fig. 20
after unit installation.
If the unit does not have hinged panels, skip this step and con-
tinue at Step 10.
TOP
PANEL
INDOOR COIL
ACCESS PANEL
SCREW
33 3/8"
(848mm)
OUTSIDE
AIR
HOOD
FILTER
FILTER
CLIP
Fig. 20 — Compressor Door Latch Location
Step 10 — Install External Condensate Trap and
Line
The unit has one
3
/
-in. condensate drain connection on the end
4
of the condensate pan and an alternate connection on the bot-
tom. See Fig. 21. Unit airflow configuration does not deter-
mine which drain connection to use. Either drain connection
can be used with vertical or horizontal applications.
To use the alternate bottom drain connection, remove the red
drain plug from the bottom connection (use a
et drive extension) and install it in the side drain connection.
The piping for the condensate drain and external trap can be
completed after the unit is in place. See Fig. 22.
CONDENSATE PAN (SIDE VIEW)
STANDARD
SIDE DRAIN
Fig. 21 — Condensate Drain Pan (Side View)
MINIMUM PITCH
1˝ (25 mm) PER
BASE RAIL
10´ (3 m) OF LINE
TO ROOF
DRAIN
NOTE: Trap should be deep enough to offset maximum unit static
difference. A 4-in. (102 mm) trap is recommended.
Fig. 22 — Condensate Drain Piping Details
NOTE: All units must have an external trap for condensate drain-
age. Install 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
/
-in.).
4
16
1
/
-in. square sock-
2
ALTERNATE
DRAIN
PLUG
BOTTOM DRAIN
(FACTORY-INSTALLED)
3˝ (76 mm)
MIN
OPEN
VENT
DRAIN PLUG
SEE NOTE
ROOF
CURB
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Troubleshooting
