Trane Tracer UC400 Installation, Operation And Maintenance Manual page 66

S S e e t t t t i i n n g g s s f f o o r r C C O O - - B B a a s s e e d d D D e e m m a a n n d d C C o o n n t t r r o o l l l l e e d d V V e e n n t t i i l l a a t t i i o o n n
2 2
the damper), this is less accurate than setting the OA damper position setpoints based on
measured outdoor airflow.
E E x x a a m m p p l l e e : : For the unit ventilator serving this example K-12 classroom, the fan airflow when
operating at maximum speed is 1200 cfm, and the fan airflow at minimum speed is 720 cfm. As
calculated in Steps 1 and 2, the design outdoor airflow rate (V
minimum outdoor airflow rate (V
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Design Minimum OA Damper Position at Maximum Fan Speed = 470 cfm / 1200 cfm = 40%
DCV Minimum OA Damper Position at Maximum Fan Speed = 120 cfm / 1200 cfm = 10%
Design Minimum OA Damper Position at Minimum Fan Speed = 470 cfm / 720 cfm = 65%
DCV Minimum OA Damper Position at Minimum Fan Speed = 120 cfm / 720 cfm = 15%
) is 120 cfm.
ot-DCVmin
) is 470 cfm and the DCV
ot-Design
BAS-SVX48H-EN