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Section 2 Installation Instructions
Electrical Service
GENERAL
WARNING
All wiring must conform to local, state and national
codes.
VOLTAGE
The maximum allowable voltage variation is ± 10%
of the rated voltage at compressor start-up (when the
electrical load is highest).
WARNING
The ice machine must be grounded in accordance
with national and local electrical codes.
FUSE/CIRCUIT BREAKER
A separate fuse/circuit breaker must be provided for
each ice machine. Circuit breakers must be H.A.C.R.
rated (does not apply in Canada).
MINIMUM CIRCUIT AMPACITY
The minimum circuit ampacity is used to help select
the wire size of the electrical supply. (Minimum
circuit ampacity is not the ice machine’s running amp
load).
The wire size (or gauge) is also dependent upon
location, materials used, length of run, etc., so it must
be determined by a qualified electrician.
P-520 - P-530 - ICE MACHINES
Ice Machine
Voltage/Phase/Cycle
Maximum Fuse/Circuit Breaker Minimum Circuit Amps
P-520 and P-530 115/1/60 20 16
CONDENSING UNIT
Refer to nameplate for correct voltage and
amperage ratings.
Scroll compressors will compress in one direction
of rotation only. Three phase compressor motors are
capable of running in either direction. Interchanging
any two of the three main power leads will reverse
the direction of rotation.
Verifying 3 Phase Direction of Rotation
Complete the entire installation of the ice machines
and condensing unit. Energize one ice machine and
the condensing unit, and monitor the suction and
discharge pressures.
Symptoms of incorrect 3 phase rotation:
1. Noisy compressor operation.
2. Low amp draw
3. Elevated suction pressure.
4. Decreased head pressure
CAUTION
Verify correct compressor rotation on
three phase units.
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