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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. 24 — Condensate Drain Pan Piping Details
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 per 3 m) of run. Do not use a pipe size smaller
than the unit connection (
/
3
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 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 electrical wire
connected to unit ground lug in control compartment, or con-
duit approved for electrical ground when installed in accor-
dance with NEC (National Electrical Code); ANSI/NFPA 70,
latest edition (in Canada, Canadian Electrical Code CSA
[Canadian Standards Association] C22.1), and local electri-
cal 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 pri-
mary are not factory connected. Installer must connect these
leads according to required operation of the convenience out-
let. If an always-energized convenience outlet operation is de-
sired, 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, con-
nect the source leads to compressor contactor C and indoor fan
contactor IFC pressure lugs with unit field power leads. See
Convenience Outlets on page 18 for power transformer
connections.
The field power wires are connected to the unit at line-side
pressure lugs on compressor contactor C and indoor fan con-
tactor IFC (see wiring diagram label for control box compo-
nent arrangement) or at factory-installed option non-fused dis-
connect switch. Maximum wire size is #2ga AWG (copper on-
ly) per pole on contactors and #2ga AWG (copper only) per
pole on optional disconnect. See Fig. 25 and unit label diagram
for field power wiring connections.
3˝ (76 mm)
MIN
SEE NOTE
ROOF
CURB
DRAIN PLUG
in.).
4
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;
remove and discard before connecting field power wires to unit
connection points. Make field power connections directly to
line connection pressure lugs only.
Failure to follow this caution could result in fire, intermittent
operation, or unsatisfactory performance.
Do not connect aluminum wire between disconnect switch
and air conditioning unit. Use only copper wire. See Fig. 26.
Units Without Non-Fused Disconnect Option
TB
11
12
Disconnect
per
NEC
208/230-1-60
Units With Non-Fused Disconnect Option
2
L1
4
L2
6
L3
Disconnect factory test leads; discard.
Fig. 25 — Power Wiring Connections
ELECTRIC
DISCONNECT
SWITCH
Fig. 26 — Disconnect Switch and Unit
UNITS
WITH
FACTORY-INSTALLED
DISCONNECT
The factory-installed option non-fused disconnect (NFD)
switch is located in a weatherproof enclosure located under the
main control box. The manual switch handle and shaft are
shipped in the disconnect enclosure. Assemble the shaft and
handle to the switch at this point. Discard the factory test leads
(see Fig. 25).
16
CAUTION
TB
11
12
13
Disconnect
per
NEC
L1
L2
L3
208/230-3-60
460-3-60
1
Optional
3
Disconnect
Switch
5
COPPER
WIRE ONLY
ALUMINUM
WIRE
NON-FUSED
Factory
Wiring
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