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Product description
Volume flow control
Fig. 2: Example
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VAV terminal unit, e.g. TVR
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Damper blade
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Actuator
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Electronic controller TROX UNIVERSAL
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Differential pressure sensor (internal)
The electronic controller is used in combination with
an air terminal unit to control variable supply or
extract air volumetric flow rates or for for room or
duct pressure control.
The controller includes a diaphragm pressure trans-
ducer that transforms the differential pressure
(effective pressure) into an electric signal. The con-
troller compares the actual value with the setpoint
value and alters the control signal of the actuator if
there is a difference between the two values.
Volume flow rate monitoring
The controller monitors the volume flow rate. If the
actual value deviates by more than 4% (can be con-
figured) from the setpoint value, a signal is emitted:
The red LEDs (on opposite sides of the con-
troller casing) blink continuously.
The alarm relay of the controller drops out
(wire break-proof).
If necessary, external alarm signal
signaling of setpoint deviation
Pressure monitoring
The target pressure is monitored by the controller, if
the actual value deviates from the configured pres-
sure deviation, the following signal is emitted:
The red LEDs (on opposite sides of the con-
troller casing) blink continuously.
The alarm relay of the controller drops out
(wire break-proof).
If necessary, external alarm signal
signaling of setpoint deviation
Shut-off monitoring
The controller monitors the damper blade position;
if a volume flow is detected although the damper
blade is in shut-off mode (override control), an
alarm is emitted:
The red LEDs (on opposite sides of the con-
troller casing) blink continuously.
The alarm relay of the controller drops out
(wire break-proof).
If necessary, external alarm signal
signaling of setpoint deviation
Product description
Control components for VAV terminal units TROX UNIVERSAL
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