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 F1245 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, discon-
nect 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
2
) between the
top clamp and X11:N on the immersion heater circuit
board (as illustrated).
Operating voltage (1x230V+N+PE) is connected to
AA1:X11 (as illustrated).
1 2 3 4 5 6
ON
L1 1 L2 L3PE
PE
0N
NL
[913( RSHUDWLQJ YROWDJH
$$
$$;
$$;
$$;
$$;
$$;
7R $$
* Only with separate earth-fault breaker.
Outside sensor
Install the outside temperature sensor (BT1) in the shade
on a wall facing north or north-west, so it is unaffected
by the morning sun.
Connect the sensor to terminal block X6:1 and X6:2 on
the input card (AA3). Use a 2 core cable of at least 0.5
mm² cable area.
If a conduit is used it must be sealed to prevent condens-
ation in the sensor capsule.
1
2
3
4
5
6
7
8
9
F1245Externt
$$;%7
VHQVRU
)
$$;
Temperature sensor, external flow line
If temperature sensor, external flow line (BT25) needs to
be used, connect it to terminal block X6:5 and X6:6 on
the input card (AA3). Use a 2 core cable of at least 0.5
mm² cable area.
1
2
3
4
5
6
7
8
9
F1245
$$;%7
)
$$;
NIBE™ F1245Chapter 5 | Electrical connections20
To Next Page
Loading...
