A.O. Smith Innovo 12-160, Installation, Service & Maintenance Manual

Page: 50 / 92

The mains power and optional electrical connections have to be connected to the terminal
block of the controller, refer to Structure of the water heater (see section 7.1).
Fig. Terminal block
1 2
3
1. Tulles
2. Pull relieves
3. Connections
8.8.2 Mains power
Note
The water heater is supplied without a power cable and isolator.
Use a power cable with cores of at least 3 x 0,75 mm
2
and a double-pole isolator with a
contact gap of at least 3 mm.
Connect the water heater to the mains power supply:
Pull the power cable through the tulles.
Connect the mains neutral core to N, the mains live core to L and the mains earth
core to
A
.
Install the power cable in the pull relief under the electrical section.
Connect the power cable to the double pole isolator.
8.8.3 Optional electrical connections
Optionally, it is possible to:
Connect an isolating transformer (see section 8.8.3.1).
Connect an external ON mode switch (see section 3.2.1.3).
Connect an additional error signal to the water heater.
8.8.3.1 Isolating transformer
For more information about an isolating transformer, or to order an isolating transformer,
please contact A.O. Smith.
8.8.3.2 External ON mode switch
Install an external ON mode switch:
Pull the cables through the tulles.
Connect the cables to X3 and X4.
Install the cables in a pull relief under the electrical section.
Set the appropriate settings in the interface.
n
1.
2.
3.
4.
•
•
•
1.
2.
3.
4.
50 Installation, Maintenance and Service part