Instruction Manual

Screw Compressor Central Chiller Chapter 2: Functional Description 12
Electrical Features
• Electronic expansion valve
• 2 remote single circuit condensers with variable speed lead fans and fan cycling (air-
cooled models)
• NEMA 12 electrical enclosure
• Touch-safe branch circuit fusing
• Liquid line solenoid and shut-off valves
• Chilled water flow switches
Controller Features
• Allen Bradley Micrologix 1500 PLC control with PanelView 300 Micro
monochrome/key pad interface
• Digital low temperature freezestat
• 3 year warranty on controller
Standard Features on Remote Condensers
• Direct-drive 3-phase fan motors with ball bearings and internal overload protection
• Electronic variable-speed control of lead fan and fan cycling for constant condenser
head pressure control
• Fans are 30” (76 cm) in diameter and have PVC-coated steel fan guards; 1½ hp (1.12
kW) variable-speed fans are 26” (66 cm) in diameter
• Internal baffles between fan cells
• UL listed in the United States and Canada
• Patented floating tube coil to eliminate tube sheet leaks
• Copper tube condenser coils have corrugated aluminum fins
• Weather-proof control panel with factory-mounted door interrupt switch
• High-efficiency condenser coil, designed for optimum performance
• Aluminum housing provides corrosion protection for outdoor applications