Appendix A: TV-VAVB3-E2 Points/Properties
TruVu™ VAVB3
-E2
CARRIER CORPORATION ©2022
Installation and Start-up Guide
All rights reserved
123
Point Name/Description
Default/Range
Min% Heat airflow when AHU Heating
- Increases the airflow to the zone and overrides
the configured minimum airflow value whenever the air source is in a heating mode. If
set to 0%, no override is active and the
Occupied
or
Unoccupied Min Airflow
value is
used.
This is not a direct percentage of the Max Heat cfm.
To calculate the
Min% Heat airflow when AHU Heating
configuration, when based on
the Heating Max cfm, Occ Min, and the desired heat minimum airflow cfm, use the
formula
Min% Heat airflow when AHU Heating = (Heat Min
–
Occ Min) / (Heat Max
–
Occ Min)
.
Variables:
•
Heat Min
= Desired Heating Minimum cfm when AHU Heating
•
Heat Max
= Heating Maximum cfm
•
Occ Min
= Occupied Minimum cfm
•
Min% Heat airflow when AHU Heating
= configuration value in % to achieve min
airflow in AHU heat mode
NOTE
These formulas do not generate an exact Heat Min cfm value, but will generate a
value that should maintain the desired Heat Minimum Airflow, whenever the AHU is in a
Heating Mode. To disable any increase in airflow during AHU Heating, set the Heat Min
value to 0%.
To calculate the minimum heating cfm when the AHU mode is Heat, use the formula
below to get the resulting Min Heat cfm when in the occupied mode:
Heat Min = [Min% Heat airflow when AHU Heating * (Heat Max - Occ Min)] + Occ Min
D:
R:
0%
0 to 100%
Flow Control
:
Click
Flow Control
to access the microblock popup
Properties
page >
Summary
and
Details
tabs. See the microblock Help for more detailed explanations.
Flow sensor
- The airflow sensor type used by your equipment. Leave as
Integral
–
onboard
.
D:
R:
Integral
–
onboard
Integral
–
onboard
Integral
–
remote
External
Damper Actuator
- The damper type used by the equipment. Leave as
Integral
–
onboard
.
D:
R:
Integral
–
onboard
Integral
–
onboard
Integral
–
remote
External
Flow Measurement Units
–
The flow measurement output. Do not change the
default of
cfm
(liters/second).
D: cfm (liters/second)
Damper Motor Travel Time
–
The actuator's travel time from full closed to full
open. Leave this field at 154 seconds.
D: 154 seconds
Direction Clockwise
–
If
Damper Actuator
is set to
Integral
–
onboard
, set this
field to the damper's position when it rotates clockwise.
D:
R:
Open
Close/Open