Low Ambient Operating Procedure For Cooling Systems With High Efficiency Condensers

A multiple refrigerant circuit cooling system includes at least a first refrigerant circuit and a second refrigerant circuit. Each of said first and second refrigerant circuits including a compressor, a condenser, an expansion device and an evaporator connected in refrigerant flow communication. The condensers of the first and second refrigerant circuits each including condenser coils having exterior surfaces and each condenser including at least one fan for drawing ambient air across the exterior surfaces of its respective condenser coil. The exterior surfaces of the condenser coil of the condenser of the first refrigerant circuit being in fluid communication with the fan of the condenser of the second refrigerant circuit to provide reduced airflow across the exterior surfaces of the condenser coils of the first refrigerant circuit at a low ambient temperature.