Outdoor Temperature Sensor - Viessmann VITOTRONIC 300 GW2 Installation And Service Instructions Manual

System components
Outdoor temperature sensor, Part No. 7820 148

Outdoor temperature sensor

600
580
560
540
520
500
480
460
440
420
400
-40 -30 -20 -10
-40 -22 -4
Outdoor temperature in ºC / ºF
(continued)
0 10 20 30
14 32 50 68 86
Additional information
Connection
Check sensor
1. Remove plug !.
2. Check the sensor resistance at
terminals 1 and 2 of the plug.
Outdoor Resistance
temperature in in 
ºC / ºF
–10 / 14 480
0 / 32 500
20 / 68 546
3. Disconnect cores from the sensor,
if actual values deviate severely from
the curve, repeat the sensor
measurement and compare with
the actual temperature.
4. Depending on the result, replace
cable or outdoor temperature
sensor.
5. Scan actual temperature.
Specification
Protection: IP 43
Permissible ambient temperature
during operation, storage and
transport:
–40 to +70ºC
–40 to 158ºF
99