sauter NRT407, Manual

Page: 27 / 76

NRT407 manual Part III Configuration 27
To avoid Y2 and Y3 opening and closing frequently during switch-over, a saddle point is
implemented. Y2 will output 0…10 V (linear) when the controller output is 0…48 % and Y3
will output 0…10 V (linear) when the controller output is 52…100 %. In the saddle point,
the outputs will always be 100 % for Y2 and 0 % for Y3.
As an addition to the function described above, it is possible to connect a CO
2
sensor to RC-
C3DOC. The output on Y3 will then be affected by either cooling demand or by the CO
2
level rising too high. The output from the CO
2
function is linear between two user-defined
setpoints (see figure below).
The variable for the min. limit of the VAV-damper is the same as for the VAV-damper in the
VAV control applications on Y2. Default is 20 % min. limit.