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 30 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

•Compressor service valves

•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

2-40 HP Portable Chillers

Chapter 2: Functional Description

11 of 78