3
UK
To avoid malfunction a minimum
distance between the air flow moni-
tor and bends, valves or such like
must be observed.
min.
5 x D
min.
3 x D
D
3 Electrical connection
The unit must only be connected by an electrician.
The national and international regulations for the installation of electrical
equipment must be observed.
Voltage supply for units up to 60 V to EN50178, SELV, PELV.
Insert a miniature fuse according to the technical data sheet, if specified.
► Disconnect power.
► Connect the unit according to the indications on the type label.
4 Adjustment
setting potentiometer
sensitivity
LEDs
1
► Apply the operating voltage.
► Switch on the flow (preset value) and keep it constant.
→ Both LEDs (red and green) light; after approx. 60s one LED goes off.
2
If the red LED lights:
► turn the pot slowly clock-
wise until the red LED
goes off and the green
LED comes on.
If the green LED lights:
► turn the pot slowly anticlockwise until the green
LED goes off and the red LED comes on.
► Turn the pot again slowly clockwise until the green
LED comes on.
3
If fluctuations as a result of the operating conditions are to be compensated for:
► turn the pot further clockwise after the green LED has lit.
After application of the supply voltage both LEDs light for about 60 s, the output relay is
energised (power-on delay time). The unit then is ready for operation.
