Connections
NOTE
To prevent interference, unscreened commu-
nication and/or sensor cables to external con-
nections must not be laid closer than 20 cm
from high voltage cables.
POWER CONNECTION
VVM 225 must be installed with a disconnection option
on the supply cable. Minimum cable area must be sized
according to the fuse rating used. The enclosed cable
(length approx. 2 m) for incoming electricity is connected
to terminal block X1 on the immersion heater board
(AA1). All installations must be carried out in accordance
with current norms and directives. The connection cable
can be found on the reverse of VVM 225.
Connection
3x400V
3x230V
1x230V
TARIFF CONTROL
If the voltage to the immersion heater disappears during
a certain period, there must also be blocking via the AU-
input, see "Connection options- Possible selection for
AU inputs".
TEMPERATURE SENSOR, EXTERNAL FLOW
LINE
If temperature sensor, external flow line (BT25) needs
to be used, connect it to terminal block X6:5 and X6:6
on the input card (AA3). Use a 2 core cable of at least
0.5 mm² cable area.
NIBE VVM 225Chapter 5 | Electrical connections24
To Next Page
Loading...
Need help?
General
