3.3
Dimensions
CHAPTER 4
FUNCTION
4.0
Function description
All of the following information and instructions are intended for use by authorized
electricians. All times may vary slightly due to component tolerances and ambient
temperatures.
QuietAir QT150 VS can be continuously operated by e.g. connecting an external 3-
Amp Stepless Speed Controller (accessory) or 0-10 V set point generator.
1. Speed setting
The adjustment of the speed can be limited internally via internal potentiometer
settings. In delivery condition, the full scope of the control range becomes available.
2. Scaling
Scaling can be set through the internal potentiometer, i.e. it will set the assignment
set point input (0-10 V) for speed control (20-100%).
No change must in principle be carried out in default activation with an external
potentiometer. Change can be made e.g. when connecting a sensor sense, when a
smaller control range is to be used.
3. Relay output
When the fan is running regardless of the speed an operational message is
displayed. The relay output is, for example, for connecting an external flap.
