General
• The heat pump must not be connected without the
permission of the electricity supplier and must be
connected under the supervision of a qualified electri-
cian.
• If F2120 is fused with a miniature circuit breaker, it
must have at least motor characteristic ”C”. For MCB
size see "Technical Specifications".
• F2120 does not include an omnipolar circuit breaker
on the incoming power supply. The heat pump’s
supply cable must be connected to a circuit breaker
with at least a 3 mm breaking gap. When the building
is equipped with an earth-fault breaker, the heat pump
should be equipped with a separate one. The earth-
fault breaker should have a nominal tripping current
of no more than 30 mA. Incoming supply must be
400V 3N~ 50Hz via electrical distribution units with
fuses.
For 230V~ 50Hz, the incoming supply must be 230V~
50Hz via distribution box with fuses.
• If an insulation test is to be carried out in the building,
disconnect the heat pump.
• If the control is to be supplied separately from other
components in the heat pump (e.g. for tariff connec-
tion), a separate operating cable must be connected
to terminal block (X5).
• The routing of cables for heavy current and signals
should be made out through the cable glands on the
heat pump's right-hand side, seen from the front.
• The communication cable must be a three core,
screened cable and be connected between F2120
terminal block X22 and the indoor module/control
module.
• Connect the charge pump to the indoor module/control
module. See where the charge pump must be connec-
ted in the installation manual for your indoor mod-
ule/control module.
NOTE
Electrical installation and any servicing must
be carried out under the supervision of a quali-
fied electrician. Disconnect the current with
the circuit breaker before carrying out any ser-
vicing. Electrical installation and wiring must
be carried out in accordance with the national
stipulations in force.
NOTE
Check the connections, main voltage and phase
voltage before starting the machine to prevent
damage to the air/water heat pump’s electron-
ics.
NOTE
The live external control must be taken into
consideration when connecting.
NOTE
If the supply cable is damaged, only NIBE, its
service representative or similar authorised
person may replace it to prevent any danger
and damage.
NIBE F2120Chapter 5 | Electrical connections22
5 Electrical connections
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