Installation & Operation Manual - Model AVC6000
Contents of this Manual are Subject to Change Without Notification
Page 35
6.5.4.2.5
Configure Alarms
Because there can be up to 4-levels of user-defined control set points based on the DI states,
each available alarm must be configured to coincide with a corresponding control setpoint
based on the DI states. The AVC has the following alarms and parameters available.
6.5.4.2.5.1
Face Velocity Alarms
(programmable Alarm delays are available)
-
Low Face Velocity Alarm
: Indicates when the measured face velocity is less than the low
velocity alarm threshold.
-
High Face Velocity Alarm
: Indicates when the measured face velocity is greater than the
high velocity alarm threshold.
-
Face Velocity Set Point Deviation Alarm:
Indicates when the measured face velocity
deviates from set point by more than the programmed value (% set point).
6.5.4.2.5.2 Volume Alarms
(programmable Alarm delays are available)
-
Low Volume Alarm
: Indicates when the measured airflow volume is less than the low
volume alarm threshold.
-
High Volume Alarm:
Indicates when the measured airflow volume is greater than the high
volume alarm threshold.
-
Volume Deviation Alarm:
Indicates when the measured airflow volume deviates from set
point by more than the programmed value (% set point)
6.5.4.2.5.3 Sash % Open Alarm
(programmable Alarm delays are available)
Indicates when the sash open area is greater than the programmed sash high % alarm threshold
6.5.4.2.5.4 Sash Sensor Fault Alarm
Provides an alarm if the vertical or horizontal sash sensor exceeds their normal range of
operation which occurs if a wire breaks or a sensor is damaged.
6.5.4.2.5.5 Actuator Fault Alarm
(programmable Alarm delays are available)
Indicates when the actuator feedback signal deviates from the control input signal by more
than the programmed value. The value can be programmed anywhere between 5% and 100%.
6.5.4.2.5.6 Face Velocity High Alarm Override
Enabling this feature will temporarily suspend all high face velocity, minimum volume, and CFM
alarms from occurring when the controller is actively controlling to the minimum airflow
volume limit. All other alarms will remain active during this time. When the sash is raised to
the point where the minimum volume limit is exceeded, the high face velocity alarm
functionality will return to normal.
Note: Reason for Using the Volume Limits
VAV fume hood control applications utilize volume limits to conserve energy and
maintain safe operating conditions. The max volume limit conserves energy by limiting
Select
