Nibe SMO S40 - 5 Electrical Connections; General

General
• Disconnect SMO S40 before insulation testing the
house wiring.
• When the building is equipped with an earth-fault
breaker the heat pump should be equipped with a
separate one.
• SMO S40 must be installed via an isolator switch. The
cable area has to be dimensioned based on the fuse
rating used.
• Use a screened cable for communication with the heat
pump.
• To prevent interference, sensor cables to external
connections must not be laid close to high voltage
cables.
• The minimum area of communication and sensor
cables to external connections must be 0.5 mm² up
to 50 m, for example EKKX, LiYY or equivalent.
• When cable routing in SMO S40, the cable grommets
(UB1 and UB2) must be used.
• For an electrical wiring diagram for the control module,
see section "Technical Specifications"
UB1 UB2
NOTE
Do not start the system before filling up with
water. Components in the system could be
damaged.
NOTE
Electrical installation and any servicing must
be carried out under the supervision of a quali-
fied electrician. Disconnect the current using
the circuit breaker before carrying out any ser-
vicing.
Electrical installation and wiring must be carried out in
accordance with the stipulations in force.
ACCESSIBILITY, ELECTRICAL CONNECTION
Removing the cover
Loosen the screws slightly. Lift the bottom edge of the
front cover of the control module and unhook the cover
on the upper edge.
SMO S40
2x
Removing the covers
The cover is opened using a screwdriver.
NIBE SMO S40Chapter 5 | Electrical connections18
5 Electrical connections