Connections
NOTE
To prevent interference, unscreened communic-
ation and/or sensor cables to external connec-
tions must not be laid closer than 20 cm from
high voltage cables.
Power connection
F470 must be installed via an isolator switch with a
minimum breaking gap of 3mm. Minimum cable area
must be sized according to the fuse rating used. Supplied
cable (length approx. 2 m) for incoming supply electricity
is connected to terminal block X1 on the immersion
heater board (AA1). The connection cable can be found
on the back of F470 (see dimensions diagram below).
Power supply cable
UB1 and UB2
NOTE
F470 is not switchable between 3x230V and
3x400V.
Connection 3x400V
Connection 3x230V
If separate supply to the compressor and immersion
heater is required, see section "Possible selection for AUX
inputs" on page 29.
Tariff control
If the voltage to the immersion heater and/or the com-
pressor disappears for a certain period, there must also
be blocking via the AUX-input at the same time, see
"Possible selection for AUX inputs".
23Chapter 5 | Electrical connectionsNIBE F470
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