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Settings and operating mode
Parameterization
The OEM generally provides the basic configuration to VAV compact controllers, especially
the parameter Vn and the opening direction. The setting of all other parameters depends on
the actual application and can be obtained from the ventilation planner or similar.
The following parameters must be checked or set prior to commissioning:
Parameter
Operating
mode
Opening
direction
Adaptive
positioning
Vmax
Vmin
Vnom
Vn
Altitude
Please refer to technical basics A6V10631862 for more explanation.
2)
Value used for displaying / not used for volume flow control loop
Variable air volume (VAV) control
The operating point is determined by the setpoint value and the Vmin / Vmax settings.
Vmin [%]
Constant air volume (CAV) control
A constant air volume flow can be achieved by sending a constant setpoint value.
Position control
The VAV compact controllers can be operated as damper actuators, i.e. using the 0..100%
setpoint as position damper setpoint, by setting the operating mode parameter to "POS".
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Siemens
Building Technologies
Range
Description
VAV (flow ctrl.) /
Interpretation of setpoint
POS (position ctrl.)
VAV = setpoint commands volume flow [%]
POS = setpoint commands damper position [%]
CW (R) / CCW (L)
Opening direction of air damper
Off / On
Adaption of actual opening range to position feedback
Off = No adaption / mapping 0°..90°
On = Pos. adaption / mapping e.g. 0°..60°
20...120%
Maximum air volume flow
-20...100%
Minimum air volume flow
3
0...60'000 m
/h
Nominal air volume flow
1...3.16
Characteristic value for the air volume flow; set by the
manufacturer (OEM)
0...5000m
Altitude level correction factor for differential pressure
in 500m steps
sensor (select n*500m value closest to real altitude)
Vmax [%]
3
0..100 %
0..100 %
2)
1 Setpoint range
2 Actual value range
3 Controlled area
Factory setting
VAV
CW (R)
Off
100 %
0 %
3
100 m
/h
1
500 meters
A6V10631832_en--_b
2016-01-29
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