General
All electrical equipment, except the outdoor sensors,
room sensors and the current sensors are ready connec-
ted at the factory.
• Disconnect the heat pump before insulation testing
the house wiring.
• If the building is equipped with an earth-fault breaker,
F1155 should be equipped with a separate one.
• If a miniature circuit breaker is used this should have
at least motor characteristic “C”. See page 69 for fuse
size.
• Electrical wiring diagrams for the heat pump, see
separate installation handbook for electrical wiring
diagrams.
• Communication and sensor cables to external connec-
tions must not be laid close to high current cables.
• The minimum area of communication and sensor
cables to external connections must be 0.5 mm² up
to 50 m, for example EKKX or LiYY or equivalent.
• When cable routing in F1155, cable grommets (e.g.
UB1-UB3, marked in image) must be used. In
UB1-UB3 the cables are inserted through the heat
pump from the back to the front.
NOTE
The switch (SF1) must not be moved to "" or
" " until the boiler has been filled with water.
Components in the product could be damaged.
NOTE
Electrical installation and service must be car-
ried out under the supervision of a qualified
electrician. Cut the current with the circuit
breaker before carrying out any servicing.
Electrical installation and wiring must be carried
out in accordance with the stipulations in force.
NOTE
Check the connections, main voltage and phase
voltage before the machine is started, to pre-
vent damage to the heat pump electronics.
MINIATURE CIRCUIT-BREAKER
The heat pump operating circuit and some of its internal
components are internally fused by a miniature circuit
breaker (FC1).
TEMPERATURE LIMITER
The temperature limiter (FQ10) cuts the power to the
electric additional heat if the temperature exceeds 89°C
and is reset manually.
Resetting
The temperature limiter (FQ10) is accessed behind the
front cover. Reset the temperature limiter by pressing
the button (FQ10-SF2) using a small screwdriver.
TEMPERATURE LIMITER, COMPRESSOR
The temperature limiter (FQ11) cuts the power supply
to the soft-start, if the temperature rises above 88°C,
and it is reset manually.
Resetting
The temperature limiter (FQ11) can be accessed behind
the front cover. Reset the temperature limiter by
pressing the button (FQ11-SF2) using a small screw-
driver.
NIBE F1155Chapter 5 | Electrical connections20
5 Electrical connections
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