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2-40 HP Portable Chillers Chapter 2: Functional Description 11 of 70
Electrical Features
• Fully accessible NEMA 12-style electrical control enclosure
• Single-point power and ground connection
• Non-fused disconnect switch, lockable
• Branch circuit fusing
• 208-230/3/60 and 460/3/60 volt (consult factory for other voltages)
• 208-230/1/60 volt on 2 and 3 1/2 hp models
Refrigeration Features
• R-22 refrigerant
• Hot gas bypass capacity control
• High discharge temperature cutout on 2 hp to 10 hp models
• High and low refrigerant pressure cutout switches
• Fan cycling switch (5 hp to 30 hp air-cooled models only)
• High pressure spring actuated relief valve
• Multiple refrigeration access ports
• Hot gas bypass and liquid line shut-off ball valves on 5 hp to 40 hp models
• Filter-dryer
• Sight glass
• Balanced port thermal expansion valve
Controller Features
• Off-the-shelf microprocessor-based PID auto-tuning controller with To Process and
Set Point LED readout
• Microprocessor temperature switch with LCD display for process water freeze
protection compressor cutout, and high process water temperature pump cutout
• Electronic time delay for proof of water flow/pressure (models w/pump only)
• Off-delay water flow timer to prevent short cycling (models w/pump only)
• 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.
• Graphic control panel with indicating and warning status lights
Other Features
• One year labor warranty and one year compressor warranty
• Two year parts warranty
• Three year limited controller warranty