IMM AGS-2 3
Introduction
General Description
McQuay GeneSys
air-cooled water chillers are complete, self-contained automatic
refrigerating units that include the latest in engineered components arranged to provide a
compact and efficient unit. Each unit is completely assembled, factory wired, evacuated,
charged, tested and comes complete and ready for installation. Each unit consists of two
air-cooled condenser sections with integral subcooler sections, two semi-hermetic, single-
screw compressors with solid-state starters, a two-circuit shell-and-tube direct expansion
evaporator, and complete refrigerant piping. Each compressor has an independent
refrigeration circuit. Liquid line components included are manual liquid line shutoff valves,
charging ports, filter-driers, sight-glass/moisture indicators, solenoid valves and electronic
expansion valves. A discharge shutoff valve is included and a compressor suction shutoff
valve is optional. Other features include compressor heaters, evaporator heaters for freeze
protection, automatic one-time pumpdown of each refrigerant circuit upon circuit
shutdown, and an advanced fully integrated microprocessor control system.
AGS units are divided between standard efficiency (model numbers ending in “0”) and high
efficiency units (ending in “5”). The high efficiency units have certain larger components.
The units are optionally available with the evaporator shipped separately for remote
mounting indoors.
A high ambient option is required for operation in ambient temperatures above 115°F
(46°C), or 105°F (41°C) on units equipped with optional fan VFDs.
Information on the operation of the unit MicroTech II controller is in the OM AGS manual.
Nomenclature
A G S - XXX C S
Inspection
When the equipment is received, carefully check all items against the bill of lading to check
for a complete shipment. Check all units for damage upon arrival. All shipping damage
must be reported to the carrier and a claim must be filed with the carrier. Check the unit’s
serial plate before unloading the unit to be sure that it agrees with the power supply
available. Physical damage to unit after acceptance is not the responsibility of McQuay
International.
Note: Unit shipping and operating weights are shown in the Physical Data Tables on page
26 for packaged units and page 60 for remote evaporator models.
Air-Cooled
Global
Rotary Screw Compressor
Design Vintage
Nominal Tons
“0” Last Digit=Std. Efficiency
“5” Last Digit=High Efficiency
S=Standard Ambient, Packaged Unit
M=Standard Ambient, Remote Evaporator
H=Packaged with High Ambient Option
B=Remote with High Ambient Option.
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