The standard compressors must be on a
minimum of 5 minutes and off for a minimum
of 3 minutes. The cycle rate must be no more
than 7 starts per hour.
The compressor life will be seriously
shortened by reduced lubrication, and the
pumping of excessive amounts of liquid oil
and liquid refrigerant.
Wiring Diagrams
Unit specific wiring diagrams are laminated
and affixed inside the controls compartment
door.
General Maintenance
When the initial startup is made, and on a
periodic schedule during operation, it is
necessary to perform routine service checks
on the performance of the condensing unit.
This includes reading and recording suction
pressures and checking for normal sub-
cooling and superheat.
COMPRESSOR ROTATION
Scroll compressors are directional
and will be damaged by operation in
the wrong direction. Low pressure
switches on compressors have been
disconnected after factory testing.
Rotation must be checked by a
qualified service technician at startup
using suction and discharge pressure
gauges and any wiring alteration must
only
be made at the unit power
connection.
COMPRESSOR CYCLING
3 MINUTE MINIMUM OFF TIME
To
prevent motor overheating
compressors must cycle off for a
minimum of 3 minutes.
5 MINUTE MINIMUM ON TIME
To maintain the proper oil level
compressors must cycle on for a
minimum of 5 minutes.
The cycle rate must not exceed 7
starts per hour.
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