Innovative technology and inspired teamwork bring you the best choice in air cooled chillers

Daikin and McQuay have teamed their resources and their technologies to provide the most innovative air cooled chiller available.

• Most efficient full load and part load operation
• Quietest sound levels published
• Largest capacity air cooled screw chiller - 550 tons
• Remote evaporator option for application flexibility
• RapidRestore® option  with Fast Loading allows a Pathfinder Chiller to restart a compressor after a temporary power loss and restore full cooling faster than any other air cooled chiller. New - Watch the video demonstration of this capability in real time on the Video tab.  

Sets the Standard for Energy Savings

Pathfinder Chiller reduces annual energy costs at an award winning family clinic in Minneapolis that is the prototype for all future clinics of the Hennepin County Medical System. Read more> 

Three levels of efficiency -
Standard, High and Premium

Optional variable frequency drives provide even more impressive cost savings at part load.

Quietest air-cooled screw chiller

The Pathfinder has sound pressure levels as low as 66 dBA, with no attenuation. We’re so confident of our sound levels that we publish them. No one else does.

Compact size for replacement projects

The length of our 300-ton unit is 9.7 feet less than another manufacturer’s 300-ton air-cooled screw chiller. And the Pathfinder™ Chiller still provides the same efficiency!

D-Net® Performance Services for Enhanced Support

This web-based service provides a direct electronic link to your Pathfinder Chiller, allowing McQuay Service to provide enhanced support, quicker response and lower service costs.

Making your building a greener place
for working, learning and enjoying...

The Pathfinder Chiller leads the industry in energy efficiency, quiet operation and responsible refrigerant management. If you want to pursue Leadership in Energy and Environmental Design (LEED®) green building certification, the performance of the Pathfinder Chiller can contribute to the following LEED points.

• EA Credit 1, Optimize Energy Efficiency: 1 to 19 possible points
• EA Credit 4, Enhanced Refrigerant Management: 2 points

1] Compressor Controls
Uses precise control logic for excellent operating efficiencies at both full and part load.

2] Optimized Condenser
Maximum heat transfer surface area resulting in a small unit footprint.

3] Evaporators
Direct expansion, pure counter-flow for impressive heat exchanger effectiveness.

4] Economizer
Optimizes refrigerant flow for maximum performance on High and Premium efficiency models, both without optional variable frequency drive.

5] Patented One-piece Molded Fan Blade
Moves large quantities of air at exceptionally quiet levels. Composite material developed and tested for 10 years to resist UV light damage and corrosion.

6] Unique Single-rotor Screw Compressor 
Designed specifically to operate more quietly than dual screw compressors.

7] Easy Access
Key components conveniently located on the periphery of the unit: compressors, filter-driers, manual liquid-line shutoff valves.

8] Serviceability
Enough headroom for a service person to stand up comfortably inside the unit.

9] Multiple Compressors with Independent Circuits
For efficient part load operation and unit redundancy.

10] Precise, Proactive Controls
Adjust to changing operating conditions, keeping the unit safely online while delivering optimum efficiency. Unit controller is easy for operators to learn and use.

11] Wye-delta or Solid State Starters
Both starter options available with solid state starters offering smooth, stepless acceleration and deceleration to reduce electrical and mechanical stress, resulting in longer compressor and motor life.

12] Power Factor Correction Capacitor
As a factory-installed option, power factor correction capacitors achieve a full load power factor of 0.95 for potentially lower utility bills due to the reduction or elimination of utility penalties for low power factor systems.

13] Expanded Electrical Voltages
Ideal for new construction or retrofit projects; available at 60 Hz (208/230/380/460/575V).

14] Open Choices™ Feature
For easy integration with your choice of building control system using BACnet®, LonTalk® or Modbus® protocols.

15] Variable Frequency Drive (VFD)
Available as an option, offering industry-leading part load efficiency and reduced in-rush current.

16]RapidRestore® and Fast Loading
With this option a Pathfinder Chiller can start a compressor as fast as 30 seconds after a temporary power loss.  Fast Loading can restore full load cooling capacity in less than five minutes.

17] Remote Evaporator Option
Remote evaporator models offer increased flexibility by allowing the evaporator to be installed indoors, thereby avoiding the use of glycol in the chiller and minimizing the risk of freezing the evaporator loop.