Nibe SMO 10, Installation And Maintenance Instructions Manual, Page: 21 / 60

Electrical connection 19
SMO 10
Centralised load control/Tariff
In those cases centralised load control or tariff control is
used this can be connected to the terminal block (14)
on the load monitor card (2).
When parts of the electrical output (how much is deter-
mined by the max output) are to be disconnected, a
potential free contact function is connected between 5
and 7 on terminal block (14).
When the complete electrical output is to be discon-
nected, a potential free contact function is connected
between 6 and 7 on terminal block (14).
A made contact results in the electrical output being
disconnected.
Load monitor
SMO 10 is equipped with an internal load monitor.
When the load monitor senses an overcurrent on one
of the phases, the immersion heater will step down the
output until it can be connected again.
The control system must be set for the installation’s
main fuse so that the load monitor can work correctly.
This is done with the knob (100), marked “fuse” on the
load monitor card (2). The supplied current sensor is
connected to the positions marked “57” up to “60” on
terminal (11) . Position “60” is the common conductor
for the three current sensors, see section Electrical
connections - Connection of sensors and external
units.
Cable type: unscreened LiYY, screened LiYCY. Cable
cross section, at least 4 x 0.25 for cable lengths up to
50 m.
Centralised load control and load monitor
14
100
2
57
58
59
60
F
as1
F
as3
F
as2