McQuay ACZ 045A, Installation, Operation And Maintenance Manual

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54 IOMM ACZ/AGZ-1
The chiller must have the manual reset system alarm conditions cleared before normal operation can
resume. If the alarm which occurred is an auto-clearing alarm, once the condition has corrected, the
chiller will resume normal operation provided the anti-cycle timers have cleared and sufficient load
exists.
System Alarm Conditions
The “System Alarm Conditions” are those alarms which are common to both refrigeration circuits and
require all compressors to be temporarily shut off or locked out, whichever applies.
System alarm conditions are:
•
Loss of Water Flow
•
Phase Voltage Monitor PVM (Optional)
•
Ground Fault Protection GFP (Optional)
The Alarm Light on the control panel will illuminate if either the PVM or GFP has a fault occurrence.
Loss of water flow is indicated on the optional Zone Terminal.
The chiller must have the manual reset system alarm conditions cleared before normal operation can
resume. If the alarm which occurred is an auto-clearing alarm, once the condition has corrected, the
chiller will resume normal operation provided the anti-cycle timers have cleared and sufficient load
exists.
ZONE TERMINAL (optional)
The Zone Terminal (ZT) is a hand-held or unit mounted device that monitors and adjusts your
McQuay Global Scroll Chiller information.
A standard telephone-style jack directly connects the ZT to the McQuay Global UNT controller.
Features
•
Portability
•
Simultaneous monitoring of three different settings or values
•
Easy operation with only seven buttons
•
Flashing numbers to show which items are ZT adjustable
•
Flashing symbols to notify you of alarm conditions
Capabilities
With the ZT, you can:
•
Quickly identify a chiller alarm and its location
•
Monitor and adjust up to 18 different settings