START UP
DESCRIPTION OF STANDARD
EQUIPMENT
Solid State Electronic Heat Pump Control
Provides efficient 30, 60 or
High / Low Pressure Switch
Provides refrigerant circuit high pressure and loss of charge protection. Includes lockout circuit built into heat pump control that is resettable from room thermostat.
Five Minute Compressor Time Delay
Provides short cycle protection for the compressor which extends compressor life. Built into the electronic heat pump control as standard.
Dual Sensor Condensate Overflow
Senses and provides system shut down if draining issue causes water level to rise in either drain pan.
Low Ambient Control
The low ambient control permits cooling operation down to 0°F outdoor ambient.
IMPORTANT INSTALLER NOTE
For improved
PHASE MONITOR
All units with three phase scroll compressors are equipped with a 3 phase line monitor to prevent compressor damage due to phase reversal.
The phase monitor in this unit is equipped with two LEDs. If the Y signal is present at the phase monitor and phases are correct the green LED will light and the compressor contactor is allowed to energize.
If phases are reversed, the red fault LED will be lit and compressor operation is inhibited.
If a fault condition occurs, reverse two of the supply leads to the unit. Do not reverse any of the unit factory wires as damage may occur.
THREE PHASE SCROLL COMPRESSOR START UP INFORMATION
Scroll compressors, like several other types of compressors, will only compress in one rotational direction. Direction of rotation is not an issue with single phase compressors since they will always start and run in the proper direction.
However, three phase compressors will rotate in either direction depending upon phasing of the power. Since there is a
Verification of proper rotation must be made at the time the equipment is put into service. If improper rotation is corrected at this time there will be no negative impact on the durability of the compressor. However, reverse operation for even one hour may have a negative impact on the bearing due to oil pump out.
All three phase scroll compressors used in the
SERVICE HINTS
1.Caution user to maintain clean air filters at all times. Also, not to needlessly close off supply air registers. This may reduce airflow through the system, which shortens equipment service life as well as increasing operating costs and noise levels.
2.Switching to heating cycle at 75°F or higher outside temperature may cause a nuisance trip of the remote reset high pressure switch. Turn thermostat off, then on to reset the high pressure switch.
3.The heat pump wall thermostats perform multiple functions. Be sure that all function switches are correctly set for the desired operating mode before trying to diagnose any reported service problems.
4.Check all power fuses or circuit breakers to be sure they are the correct rating.
5.Periodic cleaning of the outdoor coils to permit full and unrestricted airflow circulation is essential.
6.Annual maintenance is required to make sure that all of the systems are functioning properly.
a.Check to make sure that the drains are not obstructed in any way.
b.Remove any debris in the condenser section of the unit.
c.Inspect and wash outdoor coils as necessary.
7.All motors are sealed and require no oiling.
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