Electrical System - Quincy QSI-90 Instruction Manual

Electrical System

Electrical system diagrams are shown in
the parts manual sent with the compressor.
The appropriate diagram is also included
in the control panel on all Quincy QSI
compressors.
NOTICE!
D u e t o c o n t i n u o u s
improvements and updates, it is
suggested that the wiring diagram
included in the control panel be used
when servicing the electrical control.
Standard QSI drive motors are open, drip
proof (ODP), 3600 RPM motors with a
maximum ambient temperature rating of
104°F (40°C).
QSI series compressors utilize 460V
incoming power through a full voltage
(across the line) starter. A dual output
transformer in the control panel reduces
the voltage to 120 VAC for the various
controls on the unit. These controls
include the PLC, HMI, high air temperature
safety switch and solenoid. Other
incoming line voltages and a wye-delta
starter are available as options. The
compressor is provided with a NEMA 4
enclosure.
High voltage could cause death or
serious injury. Disconnect all power
supplies before opening or servicing
the electrical enclosure.
p r o d u c t
High Air Temperature Switch
A high air temperature (HAT) switch
is standard on QSI units. The HAT is
located on the air/fl uid reservoir and
protects the unit by sensing unusually high
temperatures and shutting the unit down.
The HAT is set to trip at approximately
235°F and is nonadjustable.
Never remove, bypass or tamper with
the HAT switch. Failure to provide this
safety feature could cause death or
serious injury and property damage. If
the compressor is shutting down due to
high temperature, contact a qualified
service technician immediately.
Section II - Description
DANGER!
WARNING!
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