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 elec-
trician.
■
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 build-
ing 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/con-
trol module. See where the charge pump must be
connected in the installation manual for your indoor
module/control module.
NOTE
Electrical installation and service must be car-
ried out under the supervision of a qualified
electrician. Electrical installation and wiring
must be carried out in accordance with the
stipulations in force.
NOTE
The live external control must be taken into
consideration when connecting.
AA2 FC1
X24
F5 F4 X7 F2 F1
S2
S1
X23
X22
X21
X28 X27 F3 X2 X1 X5
X9
S3
23Chapter 5 | Electrical connectionsNIBE™ F2120
5 Electrical connections
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