OMM TGZ-1 TGZ 040A through TGZ 190A 15
Field Wiring, Power
The TGZ units are supplied standard with compressor contactors and power terminal block, designed for multi-
point power supply to the unit, no compressor circuit breakers. Available options are:
• Single-point connection to power block with compressor circuit breakers
• Single-point connection to disconnect switch with compressor circuit breakers
• High short circuit current rating with single-point disconnect switch
• Multi-point connection to disconnect switch, no compressor circuit breakers
A factory installed control circuit transformer is standard. Optionally, a field-installed control power source
can be wired to the unit.
Wiring and conduit selections must comply with the National Electrical Code and/or local requirements.
An open fuse indicates a short, ground, or overload. Before replacing a fuse or restarting a compressor,
the trouble must be found and corrected. Tables in the Electrical Data section (page 4) give specific
information on recommended wire sizes.
Unit power inlet wiring must enter the control box through the right side. A 7/8-inch pilot knockout is provided.
Refer to the unit dimension drawings for the location of power and control connections.
!
CAUTION
To avoid equipment damage, use only copper conductors in main terminal block.
Control Power
A factory mounted control transformer is provided to supply the correct control circuit voltage.
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