Units are leak and
pressure tested at 437 psig high side, 250 psig low side, then
evacuated and charged. All Air-Cooled
Series R Chillers are factory tested prior to shipment.
Packaged units ship with a full operating charge of oil andrefrigerant. Unit panels, structural elements and control
boxes are constructed of 12-gauge galvanized steel and mounted
on a welded structural steel base. Unit panels and control boxes
are finished with a baked on powder paint, and the structural
base with an air dry paint. All paint meets the requirement for
outdoor equipment of the U.S. Navy and other federal
government agencies.
Evaporator
The evaporator is a tube-in-shell heat exchanger design with
internally and externally finned copper tubes roller expanded
into the tube sheet. The evaporator is designed, tested and
stamped in accordance with ASME for a refrigerant side working
pressure of 200 psig. The evaporator is designed for a water
side working pressure of 150 psig. Water connections are grooved
pipe.
Each shell includes a vent, a drain and fittings for temperature
control sensors and is insulated with 3/4-inch (140-250)or 1 1/2-inch (275-500) Armaflex II or equal insulation
(K=0.26). Evaporator heaters with thermostat are provided to
help protect the evaporator from freezing at ambient
temperatures down to -20°F.
Condenser and Fans
Air-cooled condenser coils have aluminum fins mechanically
bonded to internally finned seamless copper tubing. The
condenser coil has an integral subcooling circuit. Condensers
are factory proof and leak tested at 506 psig. Direct-drive
vertical discharge condenser fans are dynamically balanced.
Three-phase condenser fan motors with permanently lubricated
ball
bearings and internal thermal overload protection are provided.
Standard units will start and operate between 25 to115°F/-4 to 46°C ambient.
