ELECTRICAL CONNECTIONS
1. Check the electrical supply to be sure that it meets the
values specified on the unit nameplate and wiring label.
2. Remove proper low voltage knockout. Remove plastic snap
bushing from instruction packet and insert in low voltage
knockout hole.
3. The complete connection diagram and schematic wiring label
is located on the inside surface of the unit electrical box cover.
Typical Field Wiring is shown in Figures 4 and 5.
4. All field wiring to be in accordance with national electrical
code (NEC) and/or local city codes.
NOTE: Power wiring, disconnect switch, and overcurrent pro-
tection to be supplied by installer. See Physical and
Electrical Data Table for proper sizes. USE COPPER
CONDUCTORS ONLY. Unit must be grounded with a
separate ground conductor wire.
5. Install the proper size weatherproof disconnect switch out-
doors and within sight of the unit.
6. Run power wiring from the disconnect switch to the unit.
7. Install the proper size time-delay fuses or circuit breaker,
and make the power supply connections.
8. Energize the crankcase heater, if applicable, to save time
by preheating the compressor oil while the remaining instal-
lation is completed.
The crankcase heater, when furnished, is energized whenever
the compressor is not running. Check for proper operation by
feeling for heat on the compressor where the heater is installed.
The heater should be energized for at least 8 hours before the
thermostat is set to operate the compressor.
CAUTION: An attempt to start the compressor without at least
8 hours of crankcase heat will damage the com-
pressor.
A warning label with an adhesive back is supplied in the unit
installation instruction packet. This label should be attached to
the field supplied disconnect switch where it will be easily seen.
See below:
TUBING CONNECTIONS
Sweat-connect systems must use field supplied, clean, dehy-
drated refrigeration-grade copper tubing.
Quick-connect systems must use pre-charged refrigerant line
sets (quick-connect couplings) designated for the respective
unit size. Pre-charged lines with excess tubing should be
coiled horizontally in an inconspicuous location to avoid oil
trapping.
IMPORTANT
035-03095A
IF POWER HAS BEEN OFF FOR 8 HOURS OR LONGER,
DISCONNECT SWITCH MUST BE TURNED ON 8 HOURS
BEFORE THERMOSTAT IS SET TO “HEAT”, “COOL” OR
“AUTO”.
24" SERVICE
ACCESS
CLEARANCE
WEATHERPROOF
DISCONNECT SWITCH
NEC CLASS 1
WIRING
TO
BLOWER
MOTOR
RELAY
NEC CLASS 2
WIRING
TO
INDOOR
COIL
SEAL
OPENING(S)
WITH
PERMAGUM OR
EQUIVALENT
THERMOSTAT
Sit unit on
rubber
elevator
grommets to
reduce noise
and allow for
proper
drainage.
Check local weather bureau for snow accumulation.
TO POWER
SUPPLY
NOTE: ALL OUTDOOR WIRING
MUST BE WEATHERPROOF
48" OVERHEAD
CLEARANCE
INSTALL BI-FLOW FILTER
DRIER IN LIQUID LINE
12" REAR
AND SIDES
FIGURE 3 - TYPICAL INSTALLATION
515.26-N5Y
4
Unitary Products Group
