Zamil MAC-240, Installation, Operation & Maintenance Manual

Page: 16 / 67

15
3.3 MAJOR REFRIGERATION COMPONENTS
The model MAC240 is equipped with two Copeland hermetic scroll compressor. The compressors have a rated cooling
capacity of 12 tons each and one compressor is used in each refrigerant circuits. Located in the condensing section and
are accessible through front access door. Compressors are conforming to ARI540 STD.
The compressors are equipped with internal motor protection, factory installed crankcase heaters and rubber vibration
isolators for quiet and efficient operation. Each compressor has lock-out devices to protect it from short cycling when
tripped by safety controls. Each compressor has separate condenser coil with safety controls. The diesel generator-set
drives the compressor integral motor.
3.3.1 Scroll Compressor
Scroll working principal is briefly described as below: