Ariston NIMBUS PLUS M NET Manual page 75

Electrical connections between internal and external unit
Before any work on the system, shut off the power at the breaker.
EH1 EH1 ST1 ST1
B T
NOTE
It is strongly recommended to verify the presence of a surge protection device (SPD) on main power line and of circuit breakers
connected to the external and internal unit's control box
* See table of electrical connections
WARNING
After carrying out the connections between the indoor and outdoor unit, put back both panels of the respective units.
L N
ANODE
+24V
1 ph
T
ON
OFF
XXA
30mA
N N N
BUS IN
TA 1 TA 2 SE TNK BUF
B T AUX 1
3 ph
*
T
ON
OFF
XXA XXA XXA
30mA
N N N
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