Applications Guide Tracer Graphical Programming - Trane

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Chapter 7 Constant-volume AHU example
Exhaust fan control
Writing the mixed air control program
To control discharge air temperature, the mixed air control program in
your constant-volume air-handling unit must control the mixed air
damper and the outdoor air damper. In the VAV air-handling programs,
control of the mixed air and the discharge air reside in the same program.
However, due to the potential increase in complexity of discharge air control
in the constant-volume air handler, the mixed air control resides in a
separate program. Functionally, mixed air control remains identical to
the VAV air handler.
Create a new program and set its properties as shown in Figure 137 on
page 159.
158 CNT-APG001-EN