Nibe F1145 Series Installation Manual page 27

LOAD MONITOR
Integrated load monitor
F1145 is equipped with a simple form of integrated load
monitor, which limits the power steps for the electric
additional heat by calculating whether future power
steps can be connected to the relevant phase without
exceeding the specified main fuse. If the current would
exceed the specified main fuse, the power step is not
permitted. The size of the property's main fuse is spe-
cified in menu 5.1.12.
Load monitor with current sensor
When many power-consuming products are connected
in the property at the same time as the electric additional
heat is operating, there is a risk that the property's main
fuse will trip. F1145 is equipped with a load monitor
that, with the help of a current sensor, controls the
power steps for the electric additional heat by redistrib-
uting the power between the different phases or disen-
gages the electric additional heat if there is an overload
in a phase. Reconnection occurs when the other current
consumption drops.
Caution
Activate phase detection in menu 5.1.12 for
full functionality, if current sensors are installed.
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 directly adjacent to the electrical distribution
unit. The multi-core cable between the enclosure and
F1145 must have a cable area of at least 0.5 mm².
Connect the cable to the input board (AA3) on terminal
block X4:1-4 where X4:1 is the common terminal block
for the three current sensors.
Incoming electricity
PEN L L L
1 2 3
Electrical distribution
unit
Heat pump
AA3-X4
NIBE F1145
4
-T3 -T3
3
2
-T2
-T2
1
-T1
-T1
CONNECTING EXTERNAL ENERGY METER
NOTE
Connection of external energy meter requires
version 35 or later on input board (AA3) as well
as "display version" 7113 or later.
One or two energy meters (BE6, BE7) are connected to
terminal block X22 and/or X23 on input board (AA3).
AA3-X22/23
Activate the energy meter(s) in menu 5.2.4 and then set
the desired value (energy per pulse) in menu 5.3.21.
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.
EXTERNAL CONNECTION OPTIONS
F1145 has software-controlled AUX inputs and outputs
on the input board (AA3), for connecting the external
switch function or sensor. This means that when an
external switch function (the switch must be potential-
free) or sensor is connected to one of six special con-
nections, this function must be selected for the correct
connection in menu 5.4.
soft in/outputs 5.4
activate temp lux
For certain functions, accessories may be required.
Chapter 5 | Electrical connections
1 2 3
AA3-X22/23
F1145
ProduktNamn
External Externt
block heating
not used
not used
not used
alarm output
27