Handbook OPTIMA S FC BM 202206

25/34 | OPTIMA-S-FC...BM
AC/DC 24 V, contactor step control (CAV)
The VAV controller operates with setpoint in discrete steps generated by different potentials connected to the analog
input (terminal 3) and analog feedback signal (terminal 5).
Contact 2-3 = V
max
3 not connected = V
min
Contact 1-3 = damper CLOSE (control signal mode 2...10V)
Contact 1-3 = V
min
(control signal mode 0...10 V)
The control signal mode can be adjusted in the VAV controller by the handheld configuration tool ZTH-EU.
DC (0) 2 V …10 V
–
T
+
~
U
2 1
3
2
1 3 6
7
5 8
D+
T
U
/
MP
+
–
T
~
Y
-D
Additional functions can be activated by connecting the override inputs z1 and z2.
The priority of these functions is higher than the VAV modulating operation with analog input.
Override control z1
Contact 11-9 = Motor STOP
Contact 11-10 = Damper OPEN
Override control z2Contact 12-13 = Damper CLOSED
Contact 12-14 = V
max
11 and 12 without contact = no priority override through z1 or z2
10
9
14
13
12
11
9
1110 12
13
14
15 16
z1
z2 S1
–
T
+
~
–
T
+
~
Priority rule - Step-Control
1. z1
2. z2
3. a) adaption (autonomous initializing controller function)
4. b) synchronisation (autonomous initializing controller function)
5. Y-Step Control: Close – V
min
- V
max
(through analog input)