Sterling A0554831 Refrigerator User Manual


 
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