Nibe F370 Installer Manual page 24

Connecting external operating voltage for
the control system
NOTE
Only applies to power connection of 3x400V.
NOTE
Mark up any junction boxes with warnings for
external voltage.
If you wish to connect external operating voltage for
the control system to F370 on the immersion heater
circuit board (AA1) the edge connector at AA1:X2 must
be moved toAA1:X9 (as illustrated).
When connecting external operating voltage for the
control system with separate earth-fault breaker, dis-
connect the blue cable from terminal block X7:24 on
the immersion heater circuit board (AA1) and connect
in the enclosed top clamp together with the incoming
operating zero. Connect a blue cable (min 0.75 mm
between the top clamp and X11:N on the immersion
heater circuit board (as illustrated).
Operating voltage (230VAC) is connected to AA1:X11
(as illustrated).
To AA8
AA1-X8
AA1-X2
AA1-X9
AA1-X7
*
* Only with separate earth-fault breaker.
22 Chapter 5 | Electrical connections
N 0 PE L1 1 L2 L3
AA1-X11
L PE N
230V ~ 50Hz operating voltage
1x230V+N+PE
Outside sensor
Install the outdoor temperature sensor (BT1) in the
shade on a wall facing north or north-west, so it is un-
affected by the morning sun for example.
Connect the sensor to terminal block X6:1 and X6:2 on
the input board (AA3). Use a twin core cable of at least
0.5 mm² cable area.
If a conduit is used it must be sealed to prevent con-
densation in the sensor capsule.
2
)
AA1
External
AA3-X6
BT1
F370
1
2
3
4
5
6
7
AA3-X6
8
9
NIBE™ F370