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• Verify that the low voltage wires are securely
connected to the correct leads on the low
voltage terminal strip.
•
Verify that all exterior panels are replaced
and securely fastened.
•
Verify that the outdoor fan turns freely.
•
Verify that the power supply branch circuit
overcurrent protection is sized properly.
•
Verify that the thermostat is wired correctly.
The thermostat function switch should be
set to “Off’ and the thermostat fan switch
should be set to “Auto.”
Start-Up Procedure
Close all electrical disconnects to energize the
system.
WARNING:
If the unit is equipped with a crankcase
heater, allow 24 hours prior to
continuing the start up procedures
to allow for heating of the refrigerant
compressor crankcase. Failure to
comply may result in damage and
could cause premature failure of
the system. This warning should be
followed at initial start up and any
time the power has been removed for
12 hours or longer.
Air Circulation —
Leave the thermostat system
switch set to “Off” and set the thermostat fan
switch to “On.” The blower motor should run
continuously. Check for air delivery at the
register(s). Ensure that there are no obstructions
at the registers or in the duct work. Set thermostat
fan switch to “Auto.”
Short Cycle Protection —
With the system
operating in cooling mode, note the temperature
setting of the thermostat and gradually raise the
set-point temperature until the unit de-energizes.
Immediately lower the set point temperature of
the thermostat to its original setting and verify
that the indoor blower is energized. Verify that
after approximately 5 minutes the compressor
and fan energize and that the temperature
of the discharge air is cooler than the room
temperature. This is available only for the single
phase models.
System Cooling
1. Set the thermostat system switch to “Cool”
and the thermostat fan switch to “Auto”.
Gradually lower the thermostat temperature
switch below room temperature and
observe that the blower, compressor, and
fan energize. Check that air cooler than
room temperature is being discharged
at the register. Listen for any unusual
noises.
2. After allowing the unit to run for several
minutes, set the temperature selector
above room temperature.
- The fan and compressor cycles off with
the thermostat.
- The blower should also stop unless fan
switch is set to “ON” position.
System Heating —
If the unit has been equipped
with optional electric heater kits, set the system
thermostat switch to HEAT and set the thermostat
fan switch to AUTO. Verify that the compressor
and outdoor fan are not energized but that the
blower and heaters are. Check for warm air at
the supply registers.
UNIT MAINTENANCE
WARNING:
To avoid risk of electrical shock,
personal injury, or death, disconnect
all electrical power to the unit before
performing any maintenance or
service. The unit may have more than
one electrical supply.
Refrigerant Charging —
Packaged heat
pumps are fully charged at the factory . The
system refrigerant charge can be checked and
adjusted through the service ports provided
in the front panel. Use only gauge lines which
have a “Schrader” depression device present
to actuate the valve. Draw a vacuum on gauge
lines to remove air before attaching them to the
service ports on the unit. Refrigerant charging
must be done by qualifi ed personnel familiar with
safe and environmentally responsible refrigerant
handling procedures.
