Chiller Control

Chiller Control


  • Up to five (6) discrete liquid level float switches (LLCO, LLA, OP1, OP2, HLA, and HLS).


  • Analog continuous liquid level sensor with programmable setpoints for HLS, HLA, OP, LLA, and LLCO levels and their individual deadbands.
  • Up to two (2) liquid feed solenoid valves.
  • Operation of liquid feed solenoid valves based on liquid level.
  • Back Pressure Regulator (BPR) support to control product temperature. BPR may be either a dual-pressure or continuously regulating valve using auto tuning PID control.
  • Temperature monitoring and safety control of liquid


  • Customized to the specific requirements of the customer.
  • Shutdown of compressors based on high level shutdown (HLS).
  • Optional pump control to maintain a liquid flow rate or liquid pressure.
  • Flow rate monitoring by either flow switch or GPM flow meter.
  • Support for closing liquid feed valves when no compressors are running.
  • Support for shutdown when no compressors are available or on other user defined conditions.

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