The OEM generally provides the basic configuration to VAV Compact Controllers, esp. the parameters Vn and Vnom. The basic configuration is independent of the system environment where the VAV Compact Controllers are to be used.
For parameter setting, configuration and maintenance tools as described in section 5.2 are available. The following parameters must be checked or set prior to commissioning and be documented in the plant documentation. Please refer to section 9.3 for more explanation.
|Operating mode||VAV (flow ctrl.) / POS (position ctrl.)||
Interpretation of setpoint
VAV = Setpoint controls volume flow [%]
|Opening direction||CW (R) /
|Opening direction of air damper||CW (R)|
|Adaptive positioning||Off / On||
Adaption of actual opening range to position feedback 1)
Off = mapping 0°...90° 🡪 0..100 %
|Vmax||20…120%||Maximum air volume flow||100 %|
|Vmin||-20…100%||Minimum air volume flow||0 %|
|Vnom||0…60‘000 m3/h||Nominal air volume flow 2)||100 m3/h|
|Vn||1.00…3.16||Characteristic value for the air volume flow; set by the manufacturer (OEM)||1.00|
in 500m steps
|Altitude level correction factor for differential pressure sensor (select n*500m value closest to real altitude)||500 meters|
1) Adaptation must not be activated while a device jam is present
2) Value used for displaying / not used for volume flow control loop
Variable air volume control (VAV)
VAV Compact Controllers operate in VAV mode when connected to the specified power supply. The setpoint signal determines the operating range ….
2 Actual value
3 Control range
Constant air volume control (CAV)
The VAV Compact Controllers can be operated in CAV mode by setting the supervisory controller to send a constant setpoint.
VAV Compact Controllers can also be operated as damper actuators, i.e. the 0...100% setpoint is interpreted as position setpoint.