User Manual

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Siemens Building Technologies 74 319 0396 0 c AST10 B5851 22.11.2011
Vn
Vmin
Vmax
TYP
DIR
Vn
Vmin
Vmax
TYP
DIR
GLB/GDB/ASV181.1E's
internal memory
Section 1
(Set Values)
Set by AST10,
ACS931 or
ACS941
Section 2
(Reference Values)
Set by ACS931
Values
copied
By pressing the “Factory settings”
button, the reference values from
section 2 are copied to the section 1
(“Set Values”) and become active for
operation.
The copy procedure takes around 15
seconds.
Calculation chart differential pressure (dP) to factor Vn
dPnom [Pa] Factor Vn dPnom [Pa] Factor Vn
300 1.00 160 1.37
290
1.02
150 1.41
280 1.04 140 1.46
270 1.05 130 1.52
260 1.07 120 1.58
250 1.10 110 1.65
240 1.12 100 1.73
230 1.11 90 1.83
220 1.17 80 1.94
210 1.20 70 2.07
200 1.22 60 2.24
190 1.26 50 2.45
180 1.29 46 2.55
170 1.33
Example: Differential pressure dP is 180 Pa at the nominal air volume flow Vn.
Vn has to be set to 1.29 (to get a 10 V output signal at Vn).
en