DataSheet OPTIM201910 en GB

Variable Air Volume Controllers | 13 / 24
EC-Basic – CO
2
+ Temperature Room Controller
For VAV air ow control based on two physical values, temperature and CO
2
concentration simultaneously.
Functions
The room controller can set the air ow volume on the VAV controller by the 0 V ... 10 V signal. The leading values for
the control are the temperature (cooling mode or heating mode) and the concentration of CO
2
in the air. Both values
are measured inside the room controller, no additional transmitters shall be connected. The temperature and the CO
2
level are measured and evaluated simultaneously. The one with the currently larger control difference is chosen as
the actual control value for the VAV setpoint. The CO
2
control has no set-point or range to adjust. The temperature
setpoint can be adjusted manually by a dial on the room controller. The cooling or the heating mode can be pre-
adjusted by jumper switches.
Room temperature T
r
(°C)
RC temperature control
demand value (%)
100
Min Max
Room air CO
2
value Q (ppm)
RC CO
2
control
demand value (%)
100
Min Max
Y = Max (Y1, Y2) VAV flow demand value
Y1
Y2
Comparator,
max. value selection
Cooling
Heating