SystemAir MUB Multibox - Page 34

EC-Vent
Demand control for up to 5 external sensors, 2 fans, damp-
ers, heaters and coolers.
The EC vent system has 2 units. The control board (CB) and
the room unit (RU). Connect the fan to the control board and
remove the internal potentiometer.
EC-Vent
IN/RPM
PWM
IN/10V
OUT/PWN
GND
TACH
optional
+10V
0...10V/PWM
GND
Room Unit (RU)
Br + 24VDC
Y +0-10V
Gr-
Bl (GND)
R+ 24VDC
Y +0-10V
W -
CB
A
B
GND
24V
REF
T1
I2
I1
24V
C
B
A
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