NQ Series Controller

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Easy-to-Operate Control Panel Options

Each MQ Series Portable Chiller offers powerful control panel options that are easy to access, view, and operate. 

The optional, more advanced Premium Controller comes with a PLC that features operational and diagnostic screens with a touch screen interface for more precise control and remote monitoring (comes standard on all NQV Series Portable Chillers).  

NQ accuchiller control panel

Standard Controller
Includes 19 operational and diagnostic lights and includes a unique four-plug wiring design for easy replacement of the entire control board in minutes.

nq accuchiller premium controller

Premium Controller
Panasonic PLC with touch screen interface for enhanced diagnostic and operational display capabilities
(standard on the NQV Series)

Standard NQ Series Portable Microprocessor Controller Features

Standard microprocessor control panels have a large, user-friendly interface with 19 operational and diagnostic lights.  

  • Set point and process supply and return temperature displays
  • Unit alarms easily reset on control panel
  • Password protected operational parameters
  • 5-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
  • Temperature readout easily switched from °F to °C
  • Display of compressor and pump running hours helps with scheduling routine maintenance
  • Loss of phase/phase reversal/phase imbalance alarm
  • Pump test button allows for quick and easy pump rotation check from the main control panel
  • 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
  • Autostart signal capability provides outputs from the control board to allow for remote on/off contacts to remotely start and stop the chiller
  • 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

Options

  • Hand-held, remote control operator panel
  • SPI or ModBus RTU communication port

Optional Premium NQ Series Portable PLC Controller Features 

The optional, more advanced Premium controller comes with a PLC that features operational and diagnostic screens with a touch screen interface for precise control and remote monitoring (comes standard on all NQV Series Portable Chillers)

  • Set point and process supply and return of temperature displays
  • Refrigerant suction and discharge temperature displays
  • Electronic expansion valve and hot gas bypass valve position display
  • Compressor and pump running hour displays
  • Temperature readout easily switched from °F to °C
  • 5-minute compressor cycling delay (start-to-start) prevents excessive compressor cycling
  • High and low process fluid temperature deviation alarms, warnings, and safeties 
  • High and low refrigerant pressure alarms
  • Loss of phase/phase reversal/phase imbalance alarm
  • Reservoir low-level alarm
  • Loss of flow alarm
  • Freeze protection alarm
  • Pump and compressor fault alarms
  • Master reset function to restore factory default settings
  • Password protected operational parameters

Options

  • Remote HMI
  • Modbus RTU
  • Refrigerant pressure transducers
  • LonWorks or BACnet communications gateway
  • Process flow display
  • Wireless connection for a CONNEX 4.0 system

Contact us about NQ Series Accuchiller Controller Options. 

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