Knowledge Center


Absolute pressure

Gauge pressure + atmospheric pressure. (Sometimes referred to with “a” on end – e.g. Bara, Psia.)


A storage tank that receives liquid refrigerant from the evaporator and prevents it from flowing back into the compressor.


Building Energy Management System is a computer-based control system installed in buildings that controls and monitors the building’s mechanical and electrical equipment such as ventilation, lighting, power systems, fire systems, and security systems. Designed to enhance system performance, drive down operational costs and aid decision making. Also see ACIS™.

Direct Expansion Systems (DX)

This is a system using a refrigerant that passes through an expansion device prior to entering the evaporator. The system is used to extract heat in the evaporator and reject the waste heat through the condenser. This type of system is generally used in chillers, refrigerant-based air conditioning systems and refrigeration equipment.

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