Terminals for 0.5 to 2.5 mm² cables, rigid and flexible,
AWG 22–10
Control constant volume flow rate V
min
Fig. 14: Constant volume flow rate Vmin
After applying the supply voltage 24 V, the controller
throttles the volume flow rate to the value set on the V
min
potentiometer. A setpoint signal is not required. The cur-
rent actual value volume flow rate can be tapped at the
terminal (U).
Variable volume flow control V
min
... V
max
Fig. 15: Variable volume flow control
If the volume flow rate is to be specified by a higher-
level controller (e. g. for room temperature, air quality or
a DDC outstation), its 0–10 V DC output must be con-
nected by at least 2 wires (terminals 1 and 3) to the ter-
minals for the control signal (w) of the Easy controller in
accordance with the connection diagram. With a
common 24 V supply voltage, it should be noted that
terminal 1 on the Easy controller is also the ground for
the control signal.
Switching the volume flow rate V
min
/V
max
Fig. 16: Switching the volume flow rate V
min
/V
max
If the volume flow rate between two constant values can
be switched (i. e., day/night switching), it is possible to
switch over between the volume flow rate setpoint
values specified by the V
min
and V
max
potentiometers
using an on-site volt-free switch contact.
Switch S1 open
- V
min
Switch S1 closed - V
max
Parallel connection
Fig. 17: Parallel connection
If several Easy controllers are to be switched simultane-
ously with a switch contact between V
min
and V
max
, the
switch S1 must be designed as a changeover switch,
and the contact for V
min
operation must be connected to
the ground (terminal 1)
Wiring
Connection diagrams
Control component Easy for VAV terminal units
19
