period two

Components of a VAV System

notes

Direct Digital Control (DDC)

Electronic pressure transducer provides pressure-independent control

Digital controller positions modulation device, controls terminal fan and heat source

Minimum and maximum airflow settings adjusted through communication link

Electric power supply operates modulation device and electronic controller

Figure 47

Similar to electronic control, an electronic pressure transducer enables pressure-independent control of the VAV terminal unit. The digital controller positions the modulation device and operates the fan and the heat source.

Minimum and maximum airflow settings are adjusted through a communication link to the digital controller. A 24-volt power supply is required to power the unit actuator and controls.

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Trane TRG-TRC014-EN manual Components of a VAV System

TRG-TRC014-EN specifications

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