7
Wire Size based on N.E.C. for 60° type copper con-
ductors.
COPPER WIRE SIZE — AWG
(1% Voltage Drop)
Supply Wire Length-Feet Supply Circuit
200 150 100 50 Ampacity
6 8 10 14 15
4 6 8 12 20
4 6 8 10 25
4 4 6 10 30
3468 35
3468 40
2346 45
2346 50
Minimum Circuit Ampacity — Electrical wiring
to the equipment must be compatible and in
compliance with the minimum circuit ampacity
listed on the outdoor unit data label.
Maximum Fuse/Circuit Breaker Size — Circuit
protection for the outdoor unit must be compatible
with the maximum fuse/circuit breaker size listed
on the outdoor unit data label.
Disconnect Switch — An electrically compatible
disconnect switch must be within line of sight of
the outdoor unit. This switch shall be capable of
electrically de-energizing the outdoor unit.
Optional Equipment — Optional equipment
requiring connection to the power or control
circuits must be wired in strict accordance with
current provisions of the “National Electrical
Code” (ANSI/NFPA 70), with applicable local
codes having jurisdiction, and the installation
instructions provided with the equipment.
Optional Equipment (e.g.: liquid line solenoid
valves, hard start kits, low suction pressure
cutout switch kit, high pressure cutout switch kit,
refrigerant compressor crankcase heater, etc.)
should be installed in strict accordance with the
manufacturer’s installation instructions.
STARTUP AND CHECKOUT
WARNING:
Ensure electrical power to the unit is
off prior to performing the following
steps. Failure to do so may cause
personal injury or death.
Air Filters — Ensure air fi lters are clean and in
place prior to operating the equipment.
Thermostat — Set the room thermostat function
switch to OFF, fan switch to AUTO, and adjust the
temperature setpoint to its highest setting.
Prior to applying electrical power to the outdoor
unit, ensure that the unit has been properly and
securely grounded, and that power supply
connections have been made at both the facility
power interface and outdoor unit.
Outdoor Unit — Ensure the outdoor coil and
top of the unit are free from obstructions and
debris, and all equipment access/control panels
are in place.
Using extreme caution, apply power to the unit
and inspect the wiring for evidence of open,
shorted, and/or improperly wired circuits.
Functional Checkout:
CAUTION:
If equipped with a compressor
crankcase
heater, wait 24 hours prior
to performing a function checkout to
allow for heating of the compressor
crankcase. Failure to comply may
result in damage and could cause
premature failure of the system.
Indoor Blower — Set the thermostat function
switch to COOLING and the fan switch to ON.
Verify that the indoor blower is operating and
that airfl ow is not restricted. Set the fan switch
back to AUTO.
Blower Time Delay Relay (Select Models): A
time delay relay may be provided with the unit and
must be installed in the indoor section. The relay
will keep the indoor blower running an additional
40 seconds for increased cooling effi ciency after
the outdoor unit shuts off. The relay has four
terminals and one mounting hole.
Connect terminal “1” to load side of blower relay.
Connect terminal: “2” to terminal “R” of T’stat.
Connect terminal “3” to common terminal at
blower relay or transformer. Connect terminal
“4” to terminal “G” on T’stat.
Low-Pressure Switch (Select Models) — A
low-pressure switch is factory-installed in select
models only. If provided, this switch is located in
the suction line internal to the outdoor unit. The
switch is designed to protect the compressor
from a loss of charge. Under normal conditions,
the switch is closed. If the suction pressure falls
below 5 psig, then the switch will open and de-
energize the outdoor unit. The switch will close
again once the suction pressure increases above
20 psig. Please note that the switch interrupts
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