Basic Documentation

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Siemens Universal controllers RMU710B, RMU720B, RMU730B CE1P3150en
Building Technologies Aggregates 03.10.2011
10.5.4 Fixed damper setting
When the plant is off, the signal is always DC 0 V. If the mixed air damper is not
controlled by a controller, "Positioning signal min" is issued at the damper output at
switched-on plant and after startup circuit time expiration:
Y
[%]
100
0
t
Plant
startup
Plant
shutdown
Positioning signal min
3140D30en
If recirculated air operation is active (see section 10.1 "Fan (basic types A and P)"),
the out
side air damper is closed (DC 0 V).
The output signal for the mixed air dampers may not be used for outside air
dampers without recirculated air damper control, as the outside air dampers can be
closed, even if the fans are running.
10.5.5 Mixed air temperature control
Connecting mixed air temperature to the air damper block activates the mixed air
temperature controller. The mixed air temperature is controlled to a settable
setpoint with the help of air dampers.
AO
°C
.X...
.Y...
AI
M
M
M
12
y1 y2
Y
a
x
a
TMil
T
w
Y
Q
0 %
100 %
Damper
3150S43en
MECH
CC.........
Main menu > Commissioning > Extra configuration > Aggregates > Mixed air damper >
Operating line Adjustable values / remarks
Mixed air temperature ---, N.X1, N.X2, ...
Main menu > Commissioning > Settings > .... or
Main menu > Settings > Aggregates > Mixed air damper >
Operating line Range Factory setting
Mixed air temperature setpoint -50°C … 250 °C 12°C
P-band Xp 0.0 ... 500 K 10 K
Integral action time Tn 00.00...59.55 m:s 02.00 m:s
Function diagram
Configuration
Setting values