Centralised Load Control And Load Monitor - Nibe FIGHTER 1250 Installation And Maintenance Instructions Manual

B
Electrical connections

Centralised load control and load monitor

Load monitor
When many power consumers are connected in the prop-
erty at the same time as the electric addition is operating,
there is a risk of the property's main fuse tripping. The heat
pump is equipped with an integrated load monitor that
controls the electrical steps on the electrical addition.
When the phase current is at a level where there is a risk
of the main fuses tripping, the load monitor fi rst trips any
electrical additions. If this is not suffi cient, the compres-
sor is limited to 60 Hz i.e. half the maximum output (The
value can be adjusted in menu 9.12.4). This is indicated by
a fl ashing compressor symbol in the display. Reconnection
occurs when other current consumption is reduced.
A current transformer should be installed on each incom-
ing phase conductor in to the distribution box to measure
the current. The distribution box is an appropriate installa-
tion point.
Connect the current transformers to a multi-core cable in
an enclosure next to the distribution box. Use a multi-core
cable of at least 0.50 mm 2
pump.
In the heat pump the cable is connected to the load moni-
tor card, (2) on terminal X1:8 – X1:11. X1:11 is the com-
mon terminal for the three current transformers.
The size of the property's main fuse is set using the knob
(100) on the load monitor card, (2). The setting can be read
in menu 8.3.4.
Incoming electricity
PEN L L L
1 2 3
Centralised load/ Tariff
In those cases centralised load control or tariff control is
used this can be connected to the terminal X1 on the load
monitor card (2), which is positioned behind the front
cover.
Tariff A, electrical addition disconnected. Connect a poten-
tial free contact function to terminals X1:5 and X1:7.
Tariff B, compressor disconnected. Connect a potential free
contact function to terminals X1:6 and X1:7.
Tariff A and tariff B can be combined.
A closed contact results in the electrical output being dis-
connected.
26
, from the enclosure to the heat
To heat pump
X1
100
NIBE FIGHTER 1250
LEK
2