AU12 Installation Manual and Technical Service
31
EN
Use a T20 Torx screwdriver to open the screws numbered "4" on the electrical panel.
NOTE
Make sure the cables are properly fastened to the connections of the electrical panel and none
of the wires lies outside.
Use the cable grommet with clamp 3 for all the cables. Tighten the clamp thread and make sure
that the clamp-grommet connection is watertight.
Install specific cables for the outdoor air installation. Comply with the electricity regulations of
the area where the AU12 unit is being installed.
AU12 aerothermal units require single-phase electrical power supply 1/N/PE 230 V / 50 Hz. They also require a 0-10Vdc signal to
control fan speed. Lastly, they need a digital ON/OFF signal. The table below shows the meaning of each connection:
Description
Description
10V
Constant output signal at 10Vdc
11
No-load
GND
Reference mass
14
No-load
E1
Input signal 0-10 Vdc
Fan speed control
PE
Earth
D1
Input signal 10 Vdc
Fan On/Off
N
Neutral
230Vac /50Hz
A1
No-load
L1
Phase
230Vac /50Hz
A (D+)
No-load
A (D-)
No-load
Table 4.2.
Connections of the electrical panel of the AU12 unit.
NOTE
Do not connect more than 2 AU12 units directly to the electrical panel of the heat pump. The
DO16 connection will not withstand the current and will cause the heat pump to break down.
