Chapter 1: Overview
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Chapter 1: Overview
Thank you for choosing a unit manufactured by AIRSYS REFRIGERATION ENGINEERING TECHNOLOGY
(BEIJING) CO., LTD.
The AIRSYS line of wall mounted HVAC systems is optimized for energy efficiency. These systems are uniquely
designed for the efficient removal of heat generated by electronics from enclosed shelters. The supply air of the
AIRSYS system is delivered from the bottom of the machine and the exhaust is at the top, the opposite of a
traditional HVAC system. This “bottom throw” is designed to take full advantage of the fact that hotter air rises.
With the exhaust located higher within the shelter, every rotation of the fan removes more heat. The cooler air
supplied at the bottom accelerates this natural process. This is just one of many design features that makes the
AIRSYS HVAC systems among the most energy efficient in the world.
Another feature that promotes energy efficiency is the robustly designed integrated economizer, described as “free
cooling”. This feature combines with the powerful controller to provide 100% cooling capacity of the wall pack unit
(WPU), consuming ~ 1kW or less whenever the outdoor temperature is a few degrees lower than a predetermined
set point. This feature alone can save telecom operators significant utility cost, especially in cool weather climates.
Along with the energy efficiency, these systems are simple to operate, maintain, and service. The AIRSYS design
team is committed to listening and responding to the customer community. As a result, these systems have
continuously evolved with customer-defined features that have improved the overall quality and the user experience.
Usability features include:
A functional step test that facilitates complete operational verification in less than 5 minutes
Simple unobstructed access to all key components for Preventive Maintenance (PM) and servicing
No need to define compressor orientation as the units can be easily serviced with as little as an 8 inch clearance
on either side
A high level of redundancy in the precision lead/lag controller to enhance reliability
Completely selectable alarm relays (NC or NO) to enable the system to adapt to the customer’s requirements
The AIRSYS WPUs are available in cooling capacities from 1.0 ton through 5.0 ton; however, the sensible cooling
capacity of these machines is as much as 40% higher than a traditional machine. An available ordering guide helps
to properly match the capacity of the HVAC system to the heat load in the shelter.
Heating elements can also be included per customer requirements in a range from 1.5 kW through 5.0 kW.
With a suite of best in class components from around the globe, the AIRSYS WPU delivers quality and reliability
while substantially reducing cost of operation.
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