1 INTRODUCTION
1.1 Product Description and Features
The Liebert MC condenser is a low-profile, direct-drive propeller fan-type air-cooled unit suitable for
mounting outdoors. It provides heat rejection for either one or two separate refrigeration circuits, matches
the heat rejection capacity corresponding with the outdoor ambient temperature and with each
corresponding compressor heat rejection requirements. Constructed with an aluminum cabinet,
galvanized steel frame and microchannel coil, the unit is quiet and corrosion resistant. The condenser is
quickly and easily installed, because all internal wiring is completed at the factory with only electrical
connections to be made at the job site. All electrical connections and controls are enclosed in an integral
weatherproof section of the condenser.
Figure 1.1 Two-fan Liebert MC
1.2 Control, Fan Types and Features
1.2.1 Premium Efficiency Control/EC Fan
Premium Efficiency Controls and EC fans are matched to provide superior system energy efficiency. The
premium control board allows CANbus communication with the indoor unit’s Liebert iCOM® control. This
communication feature provides compressor run signals, condenser operating mode changes, condenser
alarm monitoring, simplified system charging procedures and outdoor temperature monitoring. The fans
are controlled by the premium control board using pressure transducer signals from the refrigerant
circuit and factory programming to control the refrigerant head pressure.
Vertiv | Liebert® MC™ Installer/User Guide | 11
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