Compact design.
Simple selectable settings:
Defrost interval (from 2 to 48 hours).
Defrost duration (from 1 to 63 minutes).
50 or 60 Hz operation.
Two defrost types:
Timed interval.
Compressor run time.
Three types of defrost termination:
Temperature (requires external thermostat).
Pressure (requires external pressure switch).
Time duration only.