12
CHAPTER 7
INSTALLER
FUNCTION
7.0
Function description QT150 HT (Humidity Timer Model)
Exceeding the humidity threshold or ventilation on demand by switching the switch
leads to activation of the fan.
In case of defective humidity sensor both the automatic mode and the demand
ventilation won’t work. This ensures that failure is detected.
1. Terminal assignment
- Terminal N / L
Terminal N and L have to be connected to the 230V operating voltage.
Thus the humidity control is already fully functional.
- Terminal 1
Terminal 1 activates stage 1.
- Terminal 2
Terminal 2 activates stage 2.
- Both terminals
The last specification conducts
Speed for the stage 1 and stage 2 can be adjusted via the corresponding
potentiometer (P1 for stage 1, P2 for stage 2) continuously between 20% and 100%
of maximum speed (original manufacturer's settings stage 1 – approx.70% and stage
2 – approx.100%). The adjustment applies to both the demand ventilation as well as
for the humidity control. To ensure sufficient dehumidification, speed is in automatic
mode but always at least 50% for stage 1 and at least 80% for stage 2 even at small
potentiometer.
Any changes of the DIP switch or potentiometer settings must be carried out
only by authorized and qualified electricians. The device must be
disconnected (all-pole) from power supply. A change of the DIP switch is
allowed only after switching off mains supply.
All timer settings may vary slightly due to component tolerances and ambient
air temperatures.
2. Potentiometer settings
If a higher value is desired starting from the factory default, the potentiometer must
be turned clockwise or higher. Conversely, the potentiometer is rotated counter
clockwise for a lower value. The figure below indicates the factory setting of the
potentiometer.
DANGER
Humidity
Turn-on threshold
Terminal 1 /
Stage 1
Terminal 2 /
Stage 2
Fig. 13
