Nibe S2125, Installer Manual, Page: 24 / 64

General
• Electrical installation and wiring must be carried out in
accordance with national provisions.
• Disconnect S2125 before insulation testing the house
wiring.
• If a miniature circuit breaker is used, this must have at
least triggering characteristic "C". See section "Technical
specifications" for fuse size.
• If the building is equipped with an RCD, S2125 must be
equipped with a separate one.
• The RCD should have a nominal tripping current of no
more than 30 mA.
• S2125 must be installed via an isolator switch. The cable
area has to be dimensioned based on the fuse rating used.
The incoming supply must be 400V 3N~ 50Hz via an
electrical distribution unit with fuses.
For 230V~ 50Hz, the incoming supply must be 230V~ 50Hz
via distribution box with fuses.
• 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.
• Use a screened cable for communication.
• To prevent interference, sensor cables to external connec-
tions must not be laid close to high voltage cables.
• Connect the charge pump to the control module. See
where the charge pump is to be connected in the Installer
Manual for your control module.
NOTE
Electrical installation and any servicing must be
carried out under the supervision of a qualified
electrician. Disconnect the current using the cir-
cuit breaker before carrying out any servicing.
NOTE
Check the connections, main voltage and phase
voltage before the product is started, to prevent
damage to the heat pump electronics.
NOTE
The live external control must be taken into con-
sideration when connecting.
NOTE
If the supply cable is damaged, only NIBE, its ser-
vice representative or similar authorised person
may replace it to prevent any danger and damage.
NOTE
Do not start the system before filling up with wa-
ter. Components in the system could be damaged.
Accessibility, electrical
connection
See section "Removing the side panel and top panel".
NIBE S2125 Chapter 5 | Electrical connections 24
Electrical connections