Contact: AIRSYS North America Phone: (855) 874-5380 Page 13 of 112
Email: ASNSupport@air-sys.com Web: http://airsysnorthamerica.com Rev 1.15
Ease of Control and Configuration
The controller is controlled through the Programmable Graphical Display (PGD) interface. The PGD and
button actions are explained in more detail starting on Page 45. Using the PGD interface, the user can:
• Check the status of the HVAC system, such as sensor readings and operating mode
• Change factory setpoints
• Place the system temporarily into
comfort mode
• Review alarms and alarm history
Labeling on the outside of the controller box provides a convenient guide on how to access the most
common functions. The same functions can be accessed remotely via an IP communication interface built
into the controller. The units are also pre-wired to allow for a PGD to connect directly to the unit, allowing
for testing and configuration directly from the unit.
Synchronized Cooling
When mechanical cooling is required to maintain the site temperature, all available units will run at low
speed as opposed to one unit taking the full load. This increases overall system efficiency and reduces
wear and tear on the compressor. If one of the units is taken offline, the others will adjust their speeds
accordingly to maintain the site temperature.
Standalone Mode
The system can operate in fully functional Standalone Mode when communication is lost between HVAC
and controller. This includes including free cooling, mechanical cooling, dehumidification, and heating.
This eliminates the controller as a potential single point of failure for the HVAC system.
Heat Load Matching
The variable capacity units can adjust the compressor run speed to exactly match the heat load as
opposed to cycling on and off to maintain a setpoint. Since most of the component stress occurs during
startup and shutdown, heat load matching increases overall system reliability and efficiency.
Turbo Boost
In situations such as extreme outdoor temperature, the heat load of the building may exceed the nominal
cooling capacity of the system. In those cases, Turbo Boost can automatically overdrive the units to
provide up to 125% of the rated capacity at the cost of some efficiency.
Quiet Mode
Quiet mode reduces noise by 10-14 dBA by limiting the maximum speed that the compressor can run at.
In doing so, the maximum cooling capacity will be reduced by ~15% and Turbo Boost will be disabled.
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