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Siemens
VAV compact controller G..B181.1E/3 | VAV modular controller ASV181.1E/3
CE1P3544en
Building Technologies
2016-02-26
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
Nominal volume flow [m
3
/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
volume flow [%]
These values limit the nominal volume flow. Their effect is described in
section
.
Elevation above sea level
[m]
This value enhances the accuracy of the differential pressure sensor.
Opening direction
Device-specific parameter, to be set by the OEM. It indicates the opening
direction of air damper (Clockwise (CW) or counterclockwise (CCW)).
Adaptive positioning
This function is intended for VAV boxes with a damper opening range other
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°.
Vn
Characteristic value for nominal air volume flow, preset by manufacturer
(OEM). This parameter is described in section
.
9.2
Device parameters (ACS931 / ACS941 /
AST10)
Designation*
Setting
Factory setting
Can be set with
Maximum air volume flow (Vmax) 20...120 %
100 %
ACS931, ACS941, AST10
Minimum air volume flow (Vmin)
-20...100 %
0 %
ACS931, ACS941, AST10
Opening direction (DIR)
r or L
(CW or CCW)
r
(CW)
ACS931, ACS941, AST10
Adaptive positioning
Off or on
Off
ACS931, ACS941
Nominal air volume flow
0 …. 65’535 m
3
/h 0
m
3
/h
ACS931, ACS941
Elevation above sea level
0…5000 m
(in 500 m steps)
500 m
ACS931, ACS941
Running time
30 … 150 s
150 s
ACS931, ACS941
Vn
1.00 ... 3.16
1.00
ACS931
*in brackets: designation for AST10, if different