©2009McQuay
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General Specification
Compressor
McQuay Mini Chillers are equipped with highly efficient, reliable and silence scroll compressors for
MAC060/090/120D4
Air-Cooler Condenser
The air-cooled condenser coil consists of staggered rows of 3/8’’ OD seamless copper tube,
mechanically expanded into die formed aluminum fins to ensure optimum heat exchange capability.
Condenser Fan Motor
To achieve the high air change requirement, the unit is equipped with high airflow propeller fan. The fan
is directly driven by weather proof motor to ensure reliable continuos operation.
Evaporator
The heat exchanger is made of stainless steel plates closely arranged and brazed together to ensure
high heat exchange efficiency. The complete heat exchanger is insulated with thermal closed cell nitric
rubber foam to give optimum thermal insulation.
Refrigerant Circuit
The refrigerant circuit is brazed and vacuumized in factory before accurately charged with R407C to
ensure optimum operating requirement, to ensure flawless continuous operation.
Additional Safety Protection
The units are equipped with intelligently designed safety control to ensure continuous safe operation.
Pressure switch and sensor is provided to prevent the compressor damage, resulting from both
abnormal high discharge pressure and low pressure due to insufficient gas.
The standard electronic controller provides accurate water temperature control in the circuit by closely
monitoring and reacting to the input from the water entering temperature, water leaving temperature and
ambient air temperature.
Pressure difference switch is provided in the unit to protect against lack of water flow.
During abnormal condition, the electronic controller will turn the unit off and the then display the faulty of
operation. (Refer to Troubleshooting sheet)
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