11
3. Allow the cooling system to operate for several minutes
and then set the temperature selector above room
temperature. Verify the fan and compressor cycle off
with the thermostat.
NOTE:
The blower should also
stop unless fan mode is set to ON.
System Heating - Heat Pump Mode
1. Set the thermostat’s system mode to HEAT and the
fan mode to AUTO. Gradually raise the thermostat
temperature setpoint above room temperature and
verify the compressor, outdoor fan, and indoor blower
energize.
2. Feel the air being circulated by the indoor blower and
verify it is warmer than ambient temperature. Listen for
any unusual noises. If unusual sounds occur, determine
the source of the noise and correct as necessary
System Heating - Electric Heat Mode (If
Equipped-Optional)
1. Set the thermostat's system mode to EMER. HEAT and
the fan mode to AUTO. Gradually raise the thermostat
temperature setpoint above room temperature and
verify the compressor and outdoor fan remain off, but
that the blower and heaters are energized.
2. Feel the air being circulated by the indoor blower and
verify that it is warmer than ambient temperature.
Listen for any unusual noises. If unusual sounds
occur, determine the source of the noise and correct
as necessary.
REFRIGERANT CHARGING
WARNING:
Single Packaged Heat Pumps are shipped fully
charged with R-410A refrigerant and ready
for installation. When a system is installed
according to these instructions, no refrigerant
charging is required. If repairs make it necessary
for evacuation and charging, it should only be
done by qualified, trained personnel thoroughly
familiar with this equipment. Some local codes
require licensed installation/service personnel
to service this type of equipment. Under no
circumstances should the owner attempt to
install and/or service this equipment. Failure to
comply with this warning could result in property
damage, personal injury, or death.
The system refrigerant charge can be checked and
adjusted through the service ports provided at 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.
START UP & ADJUSTMENTS
Pre-Start Check List
√
Verify the unit is level and allows condensate to drain.
√
Verify the outdoor coil and top of the unit are free from
obstructions and debris, and all equipment access/
control panels are in place.
√
Verify that the duct work is sealed to prevent air leakage.
√
Verify that the line voltage power leads are securely
connected and the unit is properly grounded.
√
Verify that the low voltage wires are securely connected
to the correct leads on the low voltage terminal strip.
√
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 system mode should be set to OFF and the
thermostat fan mode should be set to AUTO.
Start-Up Procedure
Close all electrical disconnects to energize the system.
CAUTION:
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 mode on OFF, and set the
fan mode to ON. Blower should run continuously. Check
the air delivery at the supply registers and adjust register
openings for balanced air distribution. Examine ductwork
for leaks or obstruction if insufficient air is detected. Set
the thermostat fan mode to AUTO. The blower should
stop running.
Short Cycle Protection
1. 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.
2. Immediately lower the set point temperature of the
thermostat to its original setting and verify that the
indoor blower is energized.
3. After approximately 5 minutes, verify the compressor
and fan energize and the temperature of the discharge
air is cooler than the room temperature.
System Cooling
1. Set the thermostat’s system mode to COOL and the
fan mode to AUTO. Gradually lower the thermostat
temperature setpoint below room temperature and
verify the outdoor unit and indoor blower energize.
2. Feel the air being circulated by the indoor blower and
verify that it is cooler than ambient temperature. Listen for
any unusual noises. If unusual sounds occur, determine
the source of the noise and correct as necessary.
