INSTALLATION OF UNIT
15
ENGLISH
Electric Heaters
Electric heater kit is installed as an externally mounted kit at the supply air opening.
Crankcase Heater
The crankcase heater is provided to hold the compressor oil reservoir at higher temperature than
the coldest part in the system.
Power must be supplied to crankcase heater for a minimum of 12-hours prior to system start-up.
If power is off for 6-hours or more, crankcase heater must be energized for 12-hours before
operating the system. Otherwise compressor damage may result.
Pump Down Control
If the unit is provided with pumpdown system, then a solenoid type valve is installed in the liquid
line ahead of expansion valve to prevent flow of refrigerant into the evaporator during off cycle.
The controller is wired to solenoid valve which energize in cooling and opening the valve.
Whenever the thermostat temperature is satisfied, the solenoid will close followed compressor
off after pumping the refrigerant from low side of the system until the low pressure switch open
the control circuit.
Summary of Contents for AK-C3608H00
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