82
Sensor
Capturing ele-
ment
■ Outside temperature sensor (F0)
■ Buffer temperature sensor (F4)
■ Upper cylinder temperature sensor (F6)
■ Lower cylinder temperature sensor (F7)
■ Flow temperature sensor, heating circuit with mixer M2/HC2
(F12)
■ System flow temperature sensor (F13)
■ Flow temperature sensor, cooling circuit (heating circuit without
mixer A1/HC1 or separate cooling circuit SKK) (F14)
■ Room temperature sensor for separate cooling circuit (F16)
■ Boiler water temperature sensor, external heat source (F20)
■ Buffer temperature sensor, cooling (F26)
■ Room temperature sensors
NTC 10 kΩ
■ Flow temperature sensor, secondary circuit (F8)
■ Secondary circuit return temperature sensor (X25.11/X25.12)
■ Air inlet temperature sensor (X25.1/X25.2)
■ Air outlet temperature sensor (X25.3/X25.4)
■ Sensors in the refrigerant circuit
Pt500A
Viessmann NTC 10 kΩ (blue marking)
Outside temperature sensor
100
10
-20 -10 0 10 20 30
Temperature in °C
6
8
20
40
60
80
200
Resistance in k
Ω
Further sensors
10
1
10 30 50 70 90 110
Temperature in °C
0.4
0.6
0.8
2
4
6
8
20
Resistance in k
Ω
Troubleshooting
Repairs
(cont.)
5516 436 GB
