Troubleshooting
©2022 nVent
89217391 Rev. A
111
12.5 Control valve
Control valve with actuator
Control valve for the continuous control of cooling media in primary circuit.
The actuator is activated by a control signal and moves to the position (0 ... 100%)
that is specified by the control signal.
Fig. 43: Actuator, control valve (example)
1
Actuator
2
Control valve
3
Button for locking and unlocking the
transmission
•
Button pressed:
-
The transmission unlocks
-
The motor stops
-
Manual adjustment possible
•
Button released:
-
The transmission locks
-
Normal operation
4
Adjusting screw (hexagon) of the actuator
5
Stroke switch for changing the stroke
direction (to be used only by authorised and
specialised personnel)
6
Pushbutton, indicator LED (green)
•
LED off:
-
No power supply
-
Fault
•
LED on: Operation
•
When the button is pressed, the stroke
adaptation is initiated.
7
Indicator LED (yellow)
•
Off: Normal operation
•
Illuminated: Adaptation process active
NOTE
When the system is used for the first time or when it is switched on, the actuator
performs a stroke adaptation. When the process is complete, the actuator moves
to the position that is specified by the control signal.
12513
3
4
5
6
7
1
X
"X"
2
