Free Cooling System

a Free Cooling Chiller System engineered, designed and manufactured by Delta T Systems
  • A Free Cooling System is also known as a Dry Cooler or Fluid Cooler
  • Temperature ranges from -10 to 180°F (-12°C to 82°C)
  • Usually, a minimum difference of 10°F (5°C) between ambient air and process temperature is sufficient
  • Small footprint with lift off panels for easy access
  • State of the art controls
    • Flexible remote communication options
    • Extensive digital data collection
    • Adaptive control to reduce downtime
  • Cooling Capacity from 1 to 60 tons
  • High-performance cooling solution using ambient air to cool the process fluid
  • Environmentally friendly and cost effective alternative to traditional refrigeration chillers
  • Suitable for all cooling applications such as plastic injection molding, food, chemical, data centers, and many more
  • Detailed comparison is here: How Free Coolers Work

Green Technology

A Free Cooling System is an eco-friendly, energy saving green technology

Mechanical Features

  • Variable speed EC fan motors
  • Microchannel heat exchangers for more surface area in a smaller package
  • Heat exchanger air filters

Water Features

  • Temperature ranges from -10 to 180°F (-12°C to 82°C)
  • Tight temperature control to within 0.5°F

Sensor Features

  • Fluid in and out pressure and temperature sensors
  • Tank level sensor
  • To Process Pressure Sensor

Cabinet Features

  • Fits through a standard 36 inch doorway (needs to be 34-1/2 inches or less to meet this due to door stops)
  • Small footprint
  • Can fit in standard shipping container – tallest unit is 85 inches
  • Full access on all sides
  • Round coil allows for locating unit up against a wall

Electrical Features

  • NEMA 4/12 electrical panel
  • Disconnect switch
  • 24 V controls
  • Finger safe electrical components
  • State of the art controls
    • Flexible remote communication options
    • Extensive digital data collection
    • Adaptive control to reduce downtime

 Control Features

  • Proprietary Control Platform from the leader in the HVAC and refrigeration industry
    • Integrated upgraded Ethernet interfaces offer a wide range of open protocols (Web server, Modbus/TCP, BACNet, FTP, DHCP, DNS, NTP) (optional)
    • Standard RS485 interface offers a wide range protocols, including Modbus RTU and BACnet MSTP
    • Cloud services (optional)
  • 4 Inch Touch Screen Display
  • Data Logging
    • Logs temperature and pressure data continually for historical reference
    • Captures data at the time of an alarm event
  • Remote Monitoring (optional)

Bonus Features

  • Dewpoint sensing and setpoint tracking
  • 50 Hz applications without a cooling capacity derate
  • Remote start/stop
  • Remote setpoint
  • Alarm output
  • 0-10V Temperature retransmit
  • Automatic water bypass
  • Flow indication
  • Tank level indication
  • Low and high level indication


  • Remote display
  • Outdoor construction
  • Overhead piping kit
  • Mounting feet in lieu of casters
  • Auto water make-up
  • Anti drain back kit
  • 50 micron side stream filter (factory installed)
  • 50 micron full flow filter (factory installed)
  • Alarm horn
  • Alarm strobe
  • Remote alarm contacts
  • Remote access to control
  • UL 508a
  • Electric heater for maintaining fluid above ambient temperatures
  • Pump VFD to maintain a certain flowrate or delivery pressure
  • ElectroFin® coated coils for harsh environments