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Chillers control system

For customers that demand more from their chiller / cooling system controller.

Reduce your hotels or buildings operating costs with the greenstar’s chiller controls!

With the growing concern about energy consumption, Greenstar has made it a priority to partner with manufacturers who share our goals in providing the most environmentally responsible and resource-efficient products including air handlers and also high-efficiency chillers, boilers and air-side systems.

Greenstar has extensive application experience in chiller control systems. We can retrofit almost any chiller.

Easy-to-Operate Control Panel

Each control system comes with a large, user-friendly operator interface that provides a wide array of operational and diagnostic information. No more cryptic codes or confusing instruction manuals. The control panel is easy to access, view and operate.


Standard Controller Features

  • Set point and process supply and return temperature displays
  • Unit alarms easily reset on control panel
  • Password protected operational parameters
  • 1 minute compressor cycling delay (start-to-start) prevents excessive compressor cycling
  • RTD temperature sensors and full PID temperature control loops provide accurate and consistent temperatures for +/- 1°F accuracy
  • Start-to-start anti-cycle timer prevents short-cycling of compressor while minimizing unnecessary off periods
  • Display of compressor and pump running hours helps with scheduling routine maintenance
  • Master reset function to restore factory default settings
  • Adjustable deviation alarm timer delay to prevent nuisance alarms during start-up
  • Temperature deviation warnings provide an adjustable deviation set point to indicate abnormal operation of chiller or process equipment without shutting down the chiller
  • Temperature deviation alarms provide critical condition shut down of the chiller to protect against equipment damage
  • Return water temperature display for quick monitoring from the control panel
  • Reservoir low level alarm and cut-off safety shuts down if there is not enough water
  • High and low supply temperature deviation warnings and alarms
  • Tank critical low level alarm
  • Loss of flow alarm
  • Freezestat alarm
  • Pump motor overload alarm
  • Refrigeration high pressure and low pressure alarms
  • Supply and return temperature sensor fault alarms
  • Freezestat sensor fault alarm

The greenstar Chiller controller can be configured to control:

  • Two Chillers
  • Centrifugal Chiller
  • Reciprocating Chiller
  • Scroll Chiller
  • Absorption Chiller
  • Chilled Water Pumps
  • Condenser Water Pumps
  • Cooling Tower Pumps