3 Installing temperature sensors
3.1 Outdoor temperature sensor
The heat pump’s outdoor temperature sensor (B9) is delivered with the heat pump. See
the necessary sensor connections in the unit’s electric diagram.
● In two-unit RE models, connect the sensor to controller A1.0 (master controller, in
the upper unit). If the system includes several heat pumps, connect the sensor to
the whole system’s master controller.
Connecting the sensor
Connect the sensor in terminal K in the heat pump’s Siemens RVS61.843 controller.
● 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
Outdoor installation
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.
3.2 DHW tank sensor
The sensor cable is approximately 4.5 m long. The sensor probe’s diameter is 6 mm
and length 50 mm.
Install the sensor in the domestic hot water tank’s sensor pocket as specified in the
piping diagram.
M8009 2147EN
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Summary of Contents for Lampoassa RE 28-48
Page 1: ...M8009 2147EN 25 October 2021 Installation and operation manual RE 28 48 RE 56 96...
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