Nibe VVM 300 - Centralised Load Control;Tariff; Load Monitor

22 NIBE VVM 300
Installation
Electrical connections
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
centre front cover.
Tariff A: To limit the electrical output to half of what is set
with max electrical output knob (101), connect a potential
free contact between 5 and 7 on the terminal block (14).
Tariff B: When the complete electrical output is to be dis-
connected, a potential free contact is connected between
6 and 7 on terminal block (14).
Tariff C: When the complete electrical output together
with the heat pump is to be disconnected, a potential free
contact is connected between 12 and 13 on terminal block
(14).
A closed contact results in the electrical output being dis-
connected.
Load monitor
VVM 300 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 out-
put 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 centre
front cover (set value displayed in menu 8.3.1).
The supplied current transformers are fitted on the in-
coming phases in the building's junction box. One of the
conductors on each of the three current transformers are
connected together and connected to terminal 11 on the
terminal block. The other conductors on respective current
transformers are connected to the terminals labelled 8, 9
and 10.
Cable type: unscreened LiYY, screened LiYCY. Cable cross
section, at least 4 x 0.25 for cable lengths up to 50 m.
To VVM 300
Incoming electricity
Effektvakt 100
230 Vac
L N
1234 67
8
10 12 13 14
FIGHTER
Huvudsäkring
3 st strömkännare
30.1 30.2
A
B
C
44
4
L1
L2
L3
Effektvakt 100
230 Vac
L N
1234 67
8
10 12 13 14
FIGHTER
Huvudsäkring
3 st strömkännare
30.1 30.2
A
B
C
44
4
L1
L2
L3
LEK
A
r
t.n
r
.
611??
?
2
1
bar
3
0 4
Gammalt
14
100
LEK
2
1 3
04
Gammalt
LPEN
1
L
2
L
3
Electrical distribution
unit