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Siemens
Building Technologies
9
Parameters
The VAV compact controllers can be accessed via the configuration and
maintenance tool ACS931, ACS941, and AST10.
9.1
Parameter description
Parameter
Description
3
Nominal volume flow [m
/h] Nominal air volume flow for ventilating a zone or a room. This value is
determined by size, occupation etc. of a zone or room. VAV boxes are
ordered through an OEM according to this nominal volume flow and min. /
max. volume flow settings.
Minimum / maximum
These values limit the nominal volume flow. Their effect is described in
volume flow [%]
section 5.4.
Elevation above sea level
This value enhances the accuracy of the differential pressure sensor.
[m]
Opening direction
Device-specific parameter, to be set by the OEM. It indicates the opening
direction of air damper (Clockwise (CW) or counterclockwise (CCW)).
This function is intended for VAV boxes with a damper opening range other
Adaptive positioning
than 0°..90°.
If set to "On" (adaptive positioning enabled), the actuator determines the
actual opening angle during start-up. The actual range (e.g. 15°..75°) is
then mapped to the 0..100 % positioning signal.
If set to "Off", 0..100 % is interpreted as 0..90°.
Characteristic value for nominal air volume flow, preset by manufacturer
Vn
(OEM). This parameter is described in section 2.6.
9.2
Device parameters (ACS931 / ACS941 /
AST10)
Designation*
Maximum air volume flow (Vmax)
Minimum air volume flow (Vmin)
Opening direction (DIR)
Adaptive positioning
Nominal air volume flow
Elevation above sea level
Running time
Vn
*in brackets: designation for AST10, if different
VAV compact controller G..B181.1E/3 | VAV modular controller ASV181.1E/3
Setting
Factory setting
20...120 %
100 %
-20...100 %
0 %
r or L
r
(CW or CCW)
(CW)
Off or on
Off
3
3
0 .... 65'535 m
/h
0 m
/h
0...5000 m
500 m
(in 500 m steps)
30 ... 150 s
150 s
1.00 ... 3.16
1.00
Can be set with
ACS931, ACS941, AST10
ACS931, ACS941, AST10
ACS931, ACS941, AST10
ACS931, ACS941
ACS931, ACS941
ACS931, ACS941
ACS931, ACS941
ACS931
CE1P3544en
2016-02-26
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