Nibe VVM 500 - Optional Connections

Optional connections
LOAD MONITOR
Integrated load monitor
VVM 500 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 specified 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. VVM 500 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
NOTE
If the installed air/water heat pump is frequency
controlled, it will be limited when all power
stages are disconnected.
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
VVM 500 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.
LPEN
1
L
2
L
3
AA3-X4 AA3-X4
Electrical
distribution unit
VVM500
Incoming electricity
-T1 -T2 -T3
1 2 3 4
If the installed heat pump is frequency controlled, it will
be limited when all power stages are disengaged.
NIBE UPLINK
Connect the network connected cable (straight, Cat.5e
UTP) with RJ45-contact (male) to RJ45 contact (female)
on the rear of the indoor unit.
EXTERNAL CONNECTION OPTIONS (AUX)
VVM 500 has software-controlled AUX inputs and out-
puts for connecting the external switch function (contact
has to be potential-free) or sensor.
Go into menu 5.4 "soft in/outputs" on the display to se-
lect to which AUX connection each function connects.
block heating
activate temp lux
not used
not used
not used
alarm output
soft in/outputs 5.4
For certain functions, accessories may be required.
NIBE VVM 500Chapter 5 | Electrical connections28