Nibe F1145-5 Installer Manual page 26

Load monitor
NOTE
The load monitor has no function in a 1-phase
installation.
When many electrical appliances are connected in the
property at the same time as the electric additional heat
is operating, there is a risk of the property's main fuse
tripping. The heat pump has integrated load monitors
that control the electrical steps for the electrical addition
by redistributing the power between the different phases
or disengaging in event of overload in a phase. Recon-
nection occurs when other current consumption is re-
duced.
Connecting current sensors
A current sensor should be installed on each incoming
phase conductor in to the distribution box to measure
the current. The distribution box is an appropriate install-
ation point.
Connect the current sensors to a multi-core cable in an
enclosure next to the electrical distribution unit. The
multi-core cable between the enclosure and the heat
pump must have a cable area of at least 0.5 mm².
Connect the cable to the input board (AA3) on terminal
X4:1-4 block - where X4:1 is the common terminal block
for the three current sensors.
The size of the property's main fuse is set in menu 5.1.12.
Inkommande el Incoming electricity
PEN L L L
1 2 3
Electrical distribution Elcentral
unit
Heat pump
Värmepump
AA3-X4
NIBE Uplink™
Connect the network connected cable (straight, Cat.5e
UTP) with RJ45-contact (male) to RJ45 contact (female)
on the rear of the heat pump.
26 Chapter 5 | Electrical connections
4
-T3 -T3
3
-T2 2
-T2
1
-T1
-T1
External connection options
F1145 has software controlled inputs and outputs on
the input card (AA3), for connecting the external switch
function or sensor. This means that when an external
switch function or sensor is connected to one of six spe-
cial connections, the correct function must be selected
to the correct connection in the software in F1145.
Caution
If an external switch function or sensor is con-
nected to F1145, the function to use input or
output must be selected in menu 5.4, see page
54.
Selectable inputs on the input board for these functions
are:
AUX1
AUX2
AUX3
AUX4
AUX5
Selectable outputs are AA3:X7.
soft in/outputs 5.4
activate temp lux
AA3-X6
The example above uses the inputs AUX1 (X6:9-10) andAUX2
(X6:11-12) on the input circuit board (AA3).
Caution
Some of the following functions can also be ac-
tivated and scheduled via menu settings.
X6:9-10
X6:11-12
X6:13-14
X6:15-16
X6:17-18
block heating
not used
not used
not used
alarm output
8 9 10111213
AA3-X6
F1145
F1145
Externt
External
A
B
NIBE F1145