Titus Alpha BAC-8007/BAC-8207 Dual Duct - Manual (Page 25)

Setting up dual-duct controllers
Setting the VAV terminal unit parameters
25
Setting the VAV
terminal unit
parameters
Terminal unit parameters set basic operating parameters and enable options
such as reheat and series or parallel fan operation.
Reheat Enables and sets the type of reheat. Choose from the available types of
reheat from the following list.
None —Reheat is not enabled.
Staged —Not available on dual-duct models)
Modulating —The reheat output varies from 0-10 volts.
Floating —Not available on dual-duct models.
Time proportional —Not available on dual-duct models.
Reheat equipment is connected to the controller as described in the topic
Connecting outputs on page 16 .
Dual-duct mixing minimum airflow Sets the minimum airflow which may be
different than the minimum cooling or heating airflow.
Damper direction to close Defines which direction the damper will turn to
decrease airflow.
CCW —The actuator turns counterclockwise to close the damper.
CW —The actuator turns clockwise to close the damper.
Primary duct K-factor A property of the specific VAV unit and airflow sensor to
which the primary controller is attached. This constant is supplied by the VAV
unit manufacturer.
Secondary duct K-factor A property of the specific VAV unit and airflow sensor
to which the secondary controller is attached. This constant is supplied by the
VAV unit manufacturer
Fan operation Sets the type of VAV fan in the VAV terminal unit.
None —No fan is connected to the controller.
Series —The VAV unit includes a series fan. The fan runs during a fresh air
purge, when the space is occupied or in standby.
Parallel
—The VAV unit includes a parallel fan. The fan runs when there is a
call for heat during a fresh air purge, when the space is occupied or in
standby.
Table 3-3 Unit parameters
Object Description Name Default
MSV3 Reheat Type REHEAT None
AV17 Dual Minimum DUAL MINIMUM 200 CFM
AV18 Primary K factor PR K FACT 904
BV10 Clockwise Close CLOCKWISE CLOSE CCW
MSV2 Fantype Configuration FAN CONFIG None