Emerson TCDVTM Manuel D’Utilisation

The Liebert VFD Control Condenser, Model TCDV, is an air cooled direct-drive refrigeration con-

denser designed to reject the heat from a precision air conditioning unit to the outdoor air. The con-

denser uses a Variable Frequency Drive (VFD) to control fan speed, which provides positive 

refrigerant head pressure control for outdoor ambients as low as -20°F (-28.9°C).

The VFD Control Condenser is applied to precision air conditioning units with dual refrigeration cir-

cuits, including units with digital scroll compressors.

• Variable Frequency Drive (VFD)—Programmed at the factory to integrate fluctuating head pres-

sure signals created by compressor unloading, including digital scroll compressors, and varying 

condenser capacity created by lower ambient temperatures.

• The VFD adjusts fan speed to provide stable fan speeds and condensing temperatures.
• Provides protection for motor overload and incoming power supply phase loss, undervoltage 

and overvoltage.

• Built-in EMC filter—Electromagnetic emission levels comply with EN61800-3 (Second Envi-

ronment - Light Industrial Applications).

• Inverter duty motor with permanently lubricated ceramic ball bearings for reliability
• Transducers on each circuit sense refrigerant pressures, providing input to the VFD
• Standard TVSS—Transient Voltage Surge Suppression increases condenser reliability by build-

ing in a layer of electrical protection against electrical failure caused by transient voltage surges 

from unconditioned power sources and atmospheric discharges.

• Standard Locking disconnect
• Contacts for monitoring VFD and TVSS alarm conditions
• Available in 2-, 3- or 4-fan, dual-circuit condenser models