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the current provisions of the National Electrical
Code (ANSI/NFPA 70) and with applicable local
codes having jurisdiction.
Thermostat Connections — Thermostat con-
nections should be made in accordance with the
instructions supplied with the thermostat, and
with the instructions supplied with the indoor
equipment.
Electrical Power Wiring — Electrical power
wiring shall comply with the current provisions
of the National Electrical Code (ANSI/NFPA 70)
and with applicable local codes having jurisdic-
tion. Use of rain tight conduit is recommended.
Electrical conductors shall have minimum circuit
ampacity in compliance with the outdoor unit rat-
ing label. The facility shall employ electrical circuit
protection at a current rating no greater than that
indicated on the outdoor unit rating 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 hav-
ing jurisdiction, and the installation instructions
provided with the equipment. Optional Equip-
ment (e.g.: liquid line solenoid valves, hard start
kits, low suction pressure cutout switch kit, high
pressure cutout switch kit, refrigerant compres-
sor crankcase heater, etc.) should be installed
in strict accordance with the manufacturer's
installation instructions.
8. 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 filters are clean and in
place prior to operating the equipment.
Thermostat — Set the room thermostat function
switch to OFF, fan switch to AUTO, and move
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 con-
nections 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 airflow is not restricted. Set the fan switch
back to AUTO.
Positive Temperature Coefficient Resistor
(PTCR) — (select models) A PTCR is factory
installed and located on the control panel of the
outdoor unit. The PTCR is a soft start device for
use with reciprocating compressors. If a hard
start kit is needed on this model the soft start
(PTCR) must be removed first.
Low-Pressure Switch — 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.
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