Specifications

7
Accessories
Outdoor sensor
Mounting Location
The outdoor sensor should be mounted on
the most exposed and coldest side of the
building (north or north-east) at a height of
min. 79 in (2 m) above ground.
Exception: If the preferred living area is
situated in a dierent
direction, the outside sensor
should be mounted on the
respective side of the building
accordingly.
When mounting the sensor consider external
heat sources (heated chimneys, warm hot
air from air shafts, installation on black
surfaces, thermal bridges in the wall, etc.)
which could falsify the measuring value.
The cable outlet must always be directed
downwards in order to avoid the
penetration of moisture.
Installation and electrical connection
1– Route the sensor cable to the chosen
mounting location.
2– Loosen lid screws from sensor case
and remove top.
3– Mount sensor base with enclosed
central fastening screw. Use sealing
ring! The cable outlet must be directed
downwards!
4– Insert the sensor cable so that the
cable jacket is fully enclosed by the
sealing lip.
5– Establish the electrical connection. To
this end, preferably use a 2-strand
cable with a minimum cross-section of
1 mm
2
(18 AWG). The connection is made
at the 2 screw terminals inside the
sensor case and may be interchanged.
6– Attach the lid again and screw it
rmly onto the base. Ensure correct t
of sealing ring.
Resistance values of outside sensor
For outside sensor AF 120:
T (°C) R (k
)
- 20
- 15
- 10
- 5
± 0
5
10
15
20
25
30
98.93
76.02
58.88
45.95
36.13
28.60
22.88
18.30
14.77
12.00
9.804
Note:
If other outside sensors are in use, the
respective resistance values, depending
on the temperature, can be found in the
technical documentation of the boiler
manufacturer.
The electrical connection of the respective
sensor in the boiler is described
in the respective installation instructions of
the boiler.
Outdoor sensor AF 120
T (°F)
- 4
- 5
14
23
32
41
50
59
68
77
86