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Description


Features
  • Frequency of defrost is one to six cycles per day. A minimum of four hours between successive defrost cycles.
  • Adjustable back-up defrost termination from four-110 minutes in two minute increments.
  • Control works with an external temperature or pressure sensor.
  • Choice of three contact arrangements for electric heat, compressor shutdown or hot gas defrost.
  • Positive switch action slider bar.
  • Switch ratings per pole: 40 amp, 2 hp, 690 VA pilot duty, 120-240 volts AC.
  • Heavy steel enclosure. Gray finish. Knockouts at bottom, back and sides. Hasp and staple for padlock. Available on bracket for sub-panel mounting.
  • Operating voltage: 120 or 208-240 volt, 60 Hz (50 Hz - see chart below).
  • Heavy duty, synchronous industrial type motor.

    First transfer after refrigeration cycle: (A633-20)
  • 2-4 remains closed (compressor).
  • 1-3 opens (fan).
  • 3-N remains open (heaters).

    Second transfer:
  • (3-6 minutes after the first)
  • 2-4 opens (compressor).
  • 1-3 remains open (fan).
  • 3-N closes (heaters)
  • Control supplied with 4 dial pins. Extra pins, part number X-3596.
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Specs
Contacts 1-3:
Open
Contacts 2-4:
Closed
Contacts 3-N:
None
Voltage:
120v
Defrost Cycles:
6
Features:
Time Initiated Pressure or Temperature Terminated
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