Thermia Atria Optimum, Installation Manual

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6.3.4 Connection 230 V, other alternatives
See country specific electrical instructions.
6.4 Position and connect outdoor sensors
Recommended location -->
Unsuitable location -->
The outdoor sensor is connected by a two core cable. A maximum cable length of 50 m applies for a cross section of 0.75 mm
2
. For
greater lengths a cross section of 1.5 mm
2
is used, up to a maximum of 120 m.
305
306
50
N
For high buildings, the sensor should be positioned between the second and third storeys. Its location must
not be completely protected from the wind but not in a direct draft. The outdoor sensor should not be placed
on reflective panel walls.
N
The sensor must be positioned at least 1 m from openings in the walls that emit hot air.
N
If the sensor cable is connected through a pipe, the pipe must be sealed so that the sensor is not affected by
outgoing air.
1. Position the outdoor sensor on the north or north west side of the house.
2. Connect the sensor to the heat pump’s control system.
6.5 Connect outdoor unit
Connect the outdoor unit for Atria Optimum and Atria Duo Optimum
Caution
The power cable may only be connected to the terminal block intended for this purpose. No other terminal
blocks may be used!
Installation Guide Domestic heat pumps
VMGFP202 Thermia Värmepumpar
42