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CONDENSATE PAN (SIDE VIEW)
STANDARD
SIDE DRAIN
Fig. 20 — Condensate Drain Pan (Side View)
MINIMUM PITCH
1˝ (25 mm) PER
BASE RAIL
10´ (3 m) OF LINE
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. 21 — Condensate Drain Pan 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
per 3 m) of run. Do not use a pipe size smaller than the unit con-
nection (
3
/
-in.).
4
Step 11 — Make Electrical Connections
WARNING
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: 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 power
source leads to the convenience outlet's transformer primary are
ALTERNATE
DRAIN
PLUG
BOTTOM DRAIN
(FACTORY-INSTALLED)
3˝ (76 mm)
MIN
SEE NOTE
ROOF
CURB
DRAIN PLUG
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. See Convenience Outlets on page 16 for power transformer
connections.
The field power wires are connected to the unit at line-side pres-
sure lugs on compressor contactor C and indoor fan contactor IFC
(see wiring diagram label for control box component arrange-
ment) or at factory-installed option non-fused disconnect switch.
Maximum wire size is #2ga AWG (copper only). See Fig. 22 and
23 and unit label diagram for field power wiring connections.
NOTE: Unit may be equipped with short test leads (pigtails) on
the field line connection points on contactor C or optional discon-
nect switch. These leads are for factory-run test purposes only; re-
move and discard before connecting field power wires to unit con-
nection points. Make field power connections directly to line con-
nection pressure lugs only.
FIRE HAZARD
Failure to follow this warning could result in personal injury,
death, or property damage.
Do not connect aluminum wire between disconnect switch and
unit. Use only copper wire.
Connect field power supply conductors to LINE side terminals
when the switch enclosure cover is removed to attach the handle.
ELECTRIC
DISCONNECT
SWITCH
Fig. 22 — Disconnect Switch and Unit
UNITS WITHOUT FACTORY-INSTALLED DISCONNECT
When installing units, provide a disconnect switch per NEC (Na-
tional Electrical Code) of adequate size. Disconnect sizing data
is provided on the unit informative plate. Locate on unit cabinet
or within sight of the unit per national or local codes. Do not
cover unit informative plate if mounting the disconnect on the
unit cabinet.
UNITS WITH FACTORY-INSTALLED DISCONNECT
The factory-installed optional disconnect switch is located in a
weatherproof enclosure located under the main control box. The
manual switch handle is accessible through an opening in the ac-
cess panel. Discard the factory test leads (see Fig. 23).
15
WARNING
COPPER
WIRE ONLY
ALUMINUM
WIRE
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