Centralised Load Control And Load Monitor - Nibe FIGHTER 1120 Installation And Maintenance Instructions Manual

For the Installer
18

Centralised load control and load monitor

Load monitor
FIGHTER 1120 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 using the knob (100), marked fuse on the
load monitor card (2), which is positioned behind the
front cover. The supplied current transformers are
connected to the terminal block's (14) terminals marked
8 to 11. Terminal 11 is the common conductor for the
three current transformers. The current transformers
are fitted in the building's distribution box.
Cable type: unscreened LiYY, screened LiYCY. Cable
cross section, at least 2 x 0.25 for cable lengths up to
50 m.
Current trans-
former L3
Current trans-
former L2
Current trans-
former L1
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), which is positioned
behind the front cover.
When the complete electrical output is to be discon-
nected, a potential free contact function is connected
between 5 and 7 on terminal block (14), tariff A.
When the compressor is to be disconnected, a poten-
tial free contact function is connected between 6 and 7
on terminal block (14), tariff B.
Tariff B
Tariff A
Electrical connection
14
100
2
FIGHTER 1110