AU12 Installation Manual and Technical Service
32
EN
4.2.
Electrical connections for aerothermal brine (Diagrams A and B)
If the brine system is purely aerothermal and only uses AU12 units (See Diagrams A and B in Figure 3.1), the following electrical
connections should be made:
Figure 4.2.
Electrical connections for aerothermal brine (Diagrams A and B).
4.3.
Electrical connections for hybrid geothermal-aerothermal brine (Diagram C)
If the brine system is hybrid geothermal-aerothermal (See Diagram C in la Figure 3.1), the following electrical connections should be
made:
Figure 4.3.
Electrical connections for hybrid geothermal-aerothermal brine (Diagram C).
Note:
In installations where it is desired to avoid the consumption of the ventilator, when stopped by 0Vdc signal, the power supply
can be interrupted with the signal DO16, Lon. Should there be other elements connected to the same terminal, such as 3-way
valves, a relay must be installed to avoid conflicts due to voltage returns.
Lin
N
PE
Loff
Lon
1
0
V
G
N
D
E1
D
1
A
1
A
(D
+)
B
(D
-)
1
1
1
4
P
E
N
L1
Vout
24Vac
GND
A
O
3
Sgn
Com
A
I1
2
NTC
Lin
N
PE
Loff
Lon
D
O
1
7
AU12
ecoGEO B/C
L
N
PE
D
O
6
D
O
1
6
230 V / 1/N/PE~
1
0
V
Lin
N
PE
Loff
Lon
D
O
1
6
G
N
D
E1
D
1
A
1
A
(D
+)
B
(D
-)
1
1
1
4
P
E
N
L1
Vout
24Vac
GND
A
O
3
Sgn
Com
A
I1
2
NTC
AU12
ecoGEO B/C
L
N
PE
D
O
6
