From Carrier Corp., Evergreen chiller has capacities from 200 to 1,500 tons and uses nonozone depleting, chlorine-free refrigerant. When measured against the Air Conditioning and Refrigeration Institute's conditions for full-load use, operating efficiencies approach 0.50 kW/ton. Optional refrigerant isolation valves allow refrigerant to be stored in the heat exchanger, providing a built-in containment vessel and allowing the unit to be serviced without removing the refrigerant charge.
July/August 2000, RS# 226