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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. 13 — Economizer Filter Installation
Step 9 — Units with Hinged Panels Only
If the unit does not have hinged panels, skip this step and continue
at Step 10 below.
Relocate latch shipped inside the compressor compartment behind
the hinged compressor door to location shown in Fig. 14 after unit
installation.
COMPRESSOR DOOR
Fig. 14 — Compressor Door Latch Location
Step 10 — Install External Condensate Trap
and Line
The unit has one
/
-in. condensate drain connection on the end of
3
4
the condensate pan and an alternate connection on the bottom. See
Fig. 15. 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. 15 — Condensate Drain Pan (Side View)
OUTSIDE
AIR
HOOD
FILTER
FILTER
CLIP
OUTDOOR COIL
LATCH
ALTERNATE
DRAIN
PLUG
BOTTOM DRAIN
(FACTORY-INSTALLED)
To use the alternate bottom drain connection, remove the red drain
plug from the bottom connection (use a
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. 16.
NOTE: If the alternate bottom drain is not used check the drain
plug for tightness prior to setting the unit on the roof curb.
MINIMUM PITCH
1˝ (25 mm) PER
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. 16 — Condensate Drain Piping Details
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 connection
(
/
-in.).
3
4
Step 11 — Make Electrical Connections
ELECTRIC SHOCK HAZARD
Failure to follow this warning could result in personal injury or
death.
Unit cabinet must have an uninterrupted, unbroken electrical
ground to minimize the possibility of personal injury if an
electrical fault should occur. This ground may consist of elec-
trical wire connected to unit ground lug in control compart-
ment, or conduit approved for electrical ground when installed
in accordance with NEC; ANSI/NFPA 70, latest edition (in
Canada, Canadian Electrical Code CSA [Canadian Standards
Association] C22.1), and local electrical codes.
NOTE: Check all factory and field electrical connections for tight-
ness. Field-supplied wiring shall conform with the limitations of
minimum 63°F (33°C) rise.
FIELD POWER SUPPLY
If equipped with optional Powered Convenience Outlet: The pow-
er source leads to the convenience outlet's transformer primary are
not factory connected. Installer must connect these leads accord-
ing to required operation of the convenience outlet. If an always-
energized convenience outlet operation is desired, connect the
source leads to the line side of the unit-mounted disconnect.
(Check with local codes to ensure this method is acceptable in
your area.) If a de-energize via unit disconnect switch operation of
the convenience outlet is desired, connect the source leads to the
load side of the unit disconnect. On a unit without a unit-mounted
disconnect, connect the source leads to compressor contactor C
and indoor fan contactor IFC pressure lugs with unit field power
leads.
Refer to Fig. 17 for power transformer connections and the discus-
sion on connecting the convenience outlet on page14.
12
/
-in. square socket drive
1
2
BASE RAIL
3˝ (76 mm)
MIN
OPEN
VENT
DRAIN PLUG
WARNING
SEE NOTE
ROOF
CURB
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