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7
ELECTRICAL CONNECTION
1.
The 3 phase wiring connections are made at the Upper Terminals of the
Electrical Box
(FIG 8)
.
2.
The Scroll Compressor features a microprocessor in the control unit
Control Panel Display which will detect incorrect phasing and will display
“ALARM1:” “PHASE REVERSE” and an audible alarm will sound.
3.
If these conditions occur, it is an indication that the 3 Phase connections
have been done incorrectly. To correct, shut off power at main breaker
disconnect switch and revise the connection sequence of the three phase
upper terminals of the Electrical Box
(FIG 11)
.
4.
Press the SET Button to cancel alarm and reset the Error message in
the LCD Display window.
FIG. 8
The 3 phase wiring connections MUST be done in the proper
sequence or the motor could possibly run in reverse which
could cause severe and permanent damage to the Scroll.
✓
3 PHASE REQUIREMENTS
• 208-240V, 60Hz, 22-amp, 3 phase voltage and amperage requirements. All wiring must be done by a licensed electrician, in accordance with
National Electric Code and state and local requirements. For best performance, the Compressor must be installed on a dedicated circuit, with
circuit breaker or fuse protection. Each time the Compressor motor starts, it will momentarily draw several times its full load amperage.
It is important to consider this start-up surge when specifying circuit breakers or fuses. If fuses are used, time-delay type must be installed.
• The voltage variation between the rated input voltage requirements and that of the actual input voltage supply must not /- 10%.
If greater variation exists, a step-up or step down transformer must be installed.
• The voltage variation between legs of the 3-phase supply must be within 5%. If greater variation exists, a voltage regulator or rectifier must
be used.
• The power supply wiring must be adequately sized to prevent dangerous overheating and low voltage at the Compressor during startup and
running. Low voltage will cause difficult starting, overheating, and excessive tripping of circuit breakers. The wire gauge must be increased for
longer wire runs to accommodate the increased resistance inherent in longer runs. Refer to the National Electric Code to determine the proper
wire gauge for your wire run length. Low voltage can also be caused by low supply voltage from the power company, or from other equipment
running on the same line.
• For safety reasons, install a main breaker disconnect switch in the line from the electrical panel to the Compressor within momentary reach
of the Compressor. When the switch is off, all power to the Compressor is disconnected. When the switch is on, the compressor will start and
stop automatically as it will be controlled by the pressure switch.
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