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Introduction
General Description
McQuay Air-Cooled Global Water Chillers are complete, self-contained automatic
refrigerating units. Every unit is completely assembled, factory wired, charged, and
tested.
sections, two tandem or triple scroll compressors, brazed-plate or replaceable tube,
dual circuit shell-and-tube evaporator, and complete refrigerant piping. Liquid line
components include manual liquid line shutoff valves, sight-glass/moisture indicators,
solenoid valves, and thermal expansion valves. Other features include compressor
crankcase heaters, an evaporator heater for chilled water freeze protection, limited
pumpdown during "on" or "off" periods, automatic compressor lead-lag to alternate the
compressor starting sequence, and sequenced starting of compressors.
The electrical control center includes all equipment protection and operating controls
necessary for dependable automatic operation. Condenser fan motors are protected in
all three phases and started by their own three-pole contactors.
Inspection
Check all items carefully against the bill of lading. Inspect all units for damage upon
arrival. Report shipping damage and file a claim with the carrier. Check the unit
nameplate before unloading, making certain it agrees with the power supply available.
McQuay is not responsible for physical damage after the unit leaves the factory.
Note: Unit shipping and operating weights are available in the Physical Data
tables beginning on page 28.
IOMM AGZ-5
Each unit consists of twin air-cooled condensers with integral subcooler
A G Z - XXX B S
Air-Cooled
Global
Scroll Compressor
AGZ 026B through 130B
Nomenclature
Application
S= Standard Cooling
M= Remote Evaporator
Design Vintage
Model Size
(Nominal Tons)
3
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