ECOFOREST AU12 Installations-Und Technische Seite 31

Use a T20 Torx screwdriver to open the screws numbered "4" on the electrical panel.

Make sure the cables are properly fastened to the connections of the electrical panel and none
of the wires lies outside.
NOTE

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:
10V
GND
E1
D1
A1
A (D+)
A (D-)

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.
NOTE
Description
Constant output signal at 10Vdc
Reference mass
Input signal 0-10 Vdc
Fan speed control
Input signal 10 Vdc
Fan On/Off
No-load
No-load
No-load
Table 4.2.Connections of the electrical panel of the AU12 unit.
AU12 Installation Manual and Technical Service
11
14
PE
N
L1
31
Description
No-load
No-load
Earth
Neutral
230Vac /50Hz
Phase
230Vac /50Hz