2-40 HP Portable Chillers
Chapter 2: Functional Description
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Electrical Features
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Fully accessible NEMA 12-style electrical control enclosure
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Single-point power and ground connection
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Non-fused disconnect switch, lockable
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Branch circuit fusing
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208-230/3/60 and 460/3/60 volt (consult factory for other voltages)
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208-230/1/60 volt on 2 and 3 1/2 hp models
Refrigeration Features
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R-22 refrigerant
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Hot gas bypass capacity control
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High discharge temperature cutout on 2 hp to 30 hp models
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High and low refrigerant pressure cutout switches
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Fan cycling switch (5 hp to 30 hp air-cooled models only)
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High pressure spring actuated relief valve
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Multiple refrigeration access ports
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Compressor service valves
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Hot gas bypass and liquid line shut-off ball valves on 5 hp to 40 hp models
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Filter-dryer
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Sight glass
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Balanced port thermal expansion valve
Controller Features
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Off-the-shelf microprocessor-based PID auto-tuning controller with To Process and
Set Point LED readout
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Microprocessor temperature switch with LCD display for process water freeze
protection compressor cutout, and high process water temperature pump cutout
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Electronic time delay for proof of water flow/pressure (models w/pump only)
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Off-delay water flow timer to prevent short cycling (models w/pump only)
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Low refrigerant pressure switch, override timer for low ambient start-up on remote air-
cooled and air-cooled chillers with the variable-speed fan option.
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Graphic control panel with indicating and warning status lights
Other Features
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One year labor warranty and one year compressor warranty
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Two year parts warranty
