Compact design. Integrate easily into the architechtural design
of residential and light commercial buildings.
Scroll compressors. Provide quiet, reliable opearation over a
wide temperature range, and include phase protection to prevent
reverse rotation (Models MAC/M4AC 20 C/CR and M5AC
30/50/55 C/R use a rotary compressor with phase protection).
Fully equipped for hydronic applications. Factory-packaged
and tested units lower installation costs and promote reliable
start-up and efficient operation.
Brazed plate heat exchanger. Closely arranged AISI 316
stainless steel plates provide highly efficient heat transfer.
Microprocessor control. Factory-integrated to provide
efficient operation, alarm notification and to initiate unit
protective actions.
Partial loading. Models MAC/M4AC 80~150 C/CR and
M5AC 30/50/55 C/R have two separate refrigerant circuits so
units can operate at 0-50-100% of rated capacity for improved
efficiency, especially at low load conditions.
Boiler connection. Allows units to serve as sole heating water
source in cooling only systems, or as a booster heat source in
heat pump systems.
Unit protective devices. Including high and low pressure
switches, discharge temperature sensor, pressure relief valve,
compressor water pump and fan motor overload protection.
Anti-freeze protection. Including a built-in heater in the BPHE
to prevent water from freezing inside, an anti-freeze sensor that
shuts down the compressor if the water temperature becomes
too cold and a water pressure differential switch to verify that
water is flowing in the pipes when the chiller is in operation.
Sequencing control. Models MAC/M4AC 80~150 C/CR and
M5AC 30/50/55 C/R compressors will cut in and out,
depending on their cumulative operating time, to avoid
compressor overload and promote longer compressor life.
Modular installation. Models MAC/M4AC 80~150 C/CR are
available for modular connection in a network of up to 50
chillers using the microprocessor controller. External water
piping connections can be made from the left or right side of
the unit.
Front panel access. Provides easy access to components for
maintenance and service.
Environmentally friendly refrigerant. Models using non-
ozone depleting R-407C and R-410A refrigerants are available
in early support of the Montreal Protocol.
Features and Benefits
High Efficiency, Stainless Steel Brazed
Plate Heat Exchanger
Chiller Control Panel Allows
Customized Control Over Each
Connected Unit
McQuay Chiller Control Panel
Features and Benefits
• Standard with each McQuay chiller.
• Unit-mounted or remotely installed up to
100 meters from the unit.
• Allows user to input unique parameter
settings for customized control.
• Provides current operation status and
alarm display.
• Provides tracing fault record for easy
troubleshooting.
• 8-line grapical LCD display is easy to
read.
• Menu selction and 8-button keypad
allow easy screen navigation and
modification of selected values.
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