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Section II - Description
14 Quincy Compressor
®
- QSD™
Safety Sensors
Four (4) high air temperature RTD’s are standard on
QSD
™
units. These protect the unit by sensing unusually
high temperatures and shutting the unit down.
Power$ync II
™
monitors the following areas for high air
temperature conditions:
• Stage One Discharge • Stage Two Discharge
• Stage Two Inlet • Package Discharge
Shutdowns for the Power$ync II
™
RTD’s is 435°F on
discharge locations, and 150°F on Stage 2 inlet and
165°F on package discharge.
In Back-up Mode, two HAT switches monitor stage one
and stage two discharge temperature. These switches are
nonadjustable and set to trip at approximately 470°F.
NOTE
The back-up control circuit has two (2) HAT
switches. There are no indicator lights for these
HAT shutdowns. These HAT switches can also
cause a shutdown in Power$ync II
™
Mode as a
back-up to the RTD’s.
Never remove, bypass or tamper with any safety
HAT switch or sensor. Failure to provide this
safety feature could cause death, serious injury
and property damage. If the compressor is
shutting down due to high discharge temperature,
contact a qualified service technician
immediately.
Indicators
Main Power on Light
Indicates when power from the main disconnect switch
has been turned on and there is live power at the
compressor starter and control panel. This light will
remain on as long as there is power to the unit, regardless
of the position of the control selector switch.
Always check power supply disconnect. The
power on light may be inoperable.
High Discharge Air Temperature Lights
Indicates when the unit has sensed an unusually high
discharge temperature.
NOTE
There is no indication of high temperature
shutdown on the control panel in Back-up Mode.
Motor Overload Fault
Indicates excessive amp draw of drive motor.
NOTE
There is no indication of motor overload
shutdown on the control panel in Back-up Mode.
There is a mechanical indicator on the overload
relay.
!
WARNING
!
CAUTION