VAV Controllers LVC-LowVelocity - TROX

Flow characteristics · Wiring examples
Characteristics of the control signal (example)
Characteristics of the actual value signal
V min unit V Nom V min unit V Nom
Value to be set =
V
V Nom
× 100 %
Control signal w in V
Actual value signal U in V
Volume flow rate in % of V Nom
Volume flow rate in % of V Nom
Variable flow rate control
Room temperature
controller
The supply voltage and the remote room temperature
controller must be connected as shown in the circuit
diagram on the left.
TROX Compact
Constant flow rate control
As soon as the 24 V supply voltage is applied, the controller
runs the set Vmin value as a constant flow rate.
TROX Compact
Changeover V min / V max
S1
TROX Compact
Override controls OPEN / CLOSED
S2
S3
Diode 1N 4007
TROX Compact
Switch S1 enables a changeover between the two constant
flow rates Vmin and V max .
Switch S1 open : Vmin
Switch S1 closed : V max
When multiple LVC-LowVelocity units are connected in
parallel, switch S1 must be used as changeover switch and
the contact for Vmin operation must be connected to the
ground (terminal 1).
The override controls for OPEN and CLOSED (see left)
can be achieved using external switches (potential-free
contacts); this applies to AC voltage only.
Switch S2 closed: Damper blade CLOSED
Switch S3 closed: Damper blade OPEN
All override controls can be combined both with each other
and with the different circuit options. All connections and
wiring done by the customer must comply with the generally
accepted standards of good practice and any specific local
standards.
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