Marking
Function
Position,
ECO
Position,
CUBE
Default
Upon
delivery
Default
Upon
delivery
F1
Compressor’s motor
protection circuit breaker
ON
ON
ON
ON
F2
Electric immersion heater fuse
N/A
OFF
ON
ON
F3
Control fuse (automation
system fuse)
ON
ON
ON
ON
F4
Fuse shared by the unit’s pumps
ON
ON
ON
ON
2.3 Outdoor temperature sensor (CUBE, ECO)
The outdoor temperature sensor (TE0) is supplied already connected to its sensor
cable (TE0–W1). Install the sensor during the heat pump’s installation.
Extend the cable if necessary.
● Use a regular insulated copper twin cable for connecting the cable and extending
the cable.
● Select the cross-sectional area of the wires by consulting the table below.
● Join or splice the cable ends in a way that causes no additional electrical resistance
in the wires. Protect the joint against moisture and oxidation.
Cable length (m)
40
60
80
120
Wire cross-sectional area (mm
2
)
0.50
0.75
1.0
1.5
Install the sensor outside the building with the sensor cable gland pointing downwards.
● Place the sensor in a position where the prevailing outdoor temperature can be
measured as accurately as possible.
● Make sure that the sensor is not exposed to solar radiation or heat from the
building.
Even though the sensor housing is protected against dust and water spray (IP65,
provided that the cable gland is pointed downwards), it is advisable to install the unit in
a location that is covered from rain. A good place for the sensor would be, for example,
under the eaves in a shady spot on the north wall of the building.
The type of the outdoor sensor is NTC 10 kΩ. The sensor’s β value is 3,435 K. Any
corresponding 10 kΩ NTC sensor can be used as an alternative. The sensor’s β value
can be changed from the unit’s automation settings.
2.4 In-line heater (CUBE, ECO)
CUBE heat pumps are equipped with an in-line heater in the condenser line (label:
EB203). In ECO models, the in-line heater is optional.
M8006 2123EN
13 (54)
