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The piping for the condensate drain and external trap can
be completed after the unit is in place. See Fig. 23.
CONDENSATE PAN (SIDE VIEW)
STANDARD
SIDE DRAIN
Fig. 22 — 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. 23 — Condensate Drain Pan Piping Details
All units must have an external trap for condensate
drainage. Install a trap at least 4 in. (102 mm) deep and
protect against freeze-up. If drain line is installed down-
stream 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 connection (
Step 13 — Make Electrical Connections
WARNING
Failure to follow this warning could result in personal injury
or death.
Do not use gas piping as an electrical ground. Unit cab-
inet 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
electrical wire connected to unit ground lug in control
compartment, or conduit approved for electrical ground
when installed in accordance with NEC (National Electri-
cal Code); ANSI/NFPA 70, latest edition (in Canada, Ca-
nadian Electrical Code CSA [Canadian Standards Associ-
ation] C22.1), and local electrical codes.
NOTE: Field-supplied wiring shall conform with the limita-
tions 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 not factory
connected. Installer must connect these leads according to
required operation of the convenience outlet. If an always-
energized convenience outlet operation is desired, connect
ALTERNATE
DRAIN
PLUG
BOTTOM DRAIN
(FACTORY-INSTALLED)
3˝ (76 mm)
MIN
SEE NOTE
ROOF
CURB
DRAIN PLUG
3
/
in.).
4
the source leads to the line side of the unit-mounted discon-
nect. (Check with local codes to ensure this method is ac-
ceptable in your area.) If a de-energize via unit disconnect
switch operation of the convenience outlet is desired, con-
nect 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 con-
tactor IFC pressure lugs with unit field power leads.
See CONVENIENCE OUTLETS on page 16 for power
transformer connections.
Field power wires are connected to the unit at line-side
pressure lugs on compressor contactor C and indoor fan
contactor IFC (see wiring diagram label for control box
component arrangement) or at factory-installed option non-
fused disconnect switch or HACR. Maximum wire size is
#2ga AWG (copper only) per pole on contactors and #2ga
AWG (copper only) per pole on optional disconnect or
HACR. See Fig. 24 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 dis-
connect switch. These leads are for factory-run test purposes
only; remove and discard before connecting field power wires
to unit connection points. Make field power connections direct-
ly to line connection pressure lugs only.
Units Without Disconnect or HACR Option
Equip
C
GR Lug
11
23
Disconnect
per
NEC
208/230-1-60
Ground
(GR)
Units With Disconnect or HACR Option
L1
2
4
L2
3 Phase Only
L3
6
Ground
(GR)
Disconnect factory test leads; discard.
Fig. 24 — Power Wiring Connections
UNITS WITH FACTORY-INSTALLED NON-FUSED
DISCONNECT OR HACR — The factory-installed op-
tion non-fused disconnect (NFD) or HACR switch is locat-
ed in a weatherproof enclosure located under the main con-
trol box. The manual switch handle and shaft are shipped in
the disconnect or HACR enclosure. Assemble the shaft and
handle to the switch at this point. Discard the factory test
leads (see Fig. 24).
15
1-ph Belt Drive IFM
Direct Drive IFM
C
IFC
or
Equip
11
13
13
23
TB
GR Lug
Disconnect
per
NEC
L1
L2
L3
Ground
(GR)
208/230-3-60
460-3-60
575-3-60
1
Optional
Disconnect
3
3 Phase Only
Switch
5
Equip GR Lug
Factory
Wiring
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