Modular Screw Air to Water Chiller – LSB Series

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air to water chiller

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· Evaporator
The evaporator is direct expansion, shell-and-tube type with water flowing in the baffled shell side and refrigerant flowing through the tubes. The evaporator has a carbon steel fin and seamless high efficiency copper tubes roller expanded into a carbon steel tube sheet.

Refrigerant heads are carbon steel with multi-pass baffles to provide oil return and are removable to permit access to the tubes from either end. For water removal, 10mm vent and drain plugs are provided on the top and bottom of the shell. An ambient air thermostat controls the heater cable. The fitted and glued in place insulation has a K factor of 0.28. The refrigerant side maximum operating pressure is 2068 kPa. The water side operating pressure is 1048 kPa. Each evaporator is designed, constructed, inspected, and stamped according to the requirements of the ASME Boiler and Pressure Vessel Code.
· Condenser
Condenser coils have internally enhanced seamless copper tubes arranged in a staggered row pattern. The coils are mechanically expanded into louver aluminum fins with full fin collars. Golden Fin is available for corrosive atmospheres, fitted with a protective wire mesh guard. Condenser fans are composed of corrosion resistant aluminum hub and glass-fiber reinforced polypropylene composite blades molded into a low noise airfoil section. They are designed for maximum efficiency and are statically and dynamically balanced for vibration-free operation. They are directly driven by independent motors, and positioned for vertical air discharge. The fan guards are constructed of heavy-gauge, rust-resistant, coated steel. The fan motors are totally enclosed air-over, squirrel-cage type, current protected. They feature ball bearings that are double-sealed and permanently lubricated.
· Microprocessor Controller
The chiller’s Unit Control Module is an innovative, modular microprocessor control design. It coordinates the actions of the chiller in an efficient manner and provides stand-alone operation of the unit. A Human Interface Panel is a standard component of the Chiller. Access to all unit controls is via the Human Interface Panel.
· Compressor
Suction gas cooled semi-hermetic compact twin screw compressors with high efficiency profile. Compressors are provided with high efficiency suction strainer, oil trainer crank case heater and built in safety pressure relief valve. Moreover, they come with intelligent electronics including motor temperature monitoring, phase sequence monitoring, manual reset lockout and discharge temperature protection by PTC`s sensors. Optimized oil management ensures minimum refrigerant dilution in oil.