Replacing The Boiler Temperature Sensor - Viessmann Vitocrossal 200 CM2 186 Service Instruction

Commissioning, Inspection and Maintenance

Replacing the Boiler Temperature Sensor

3A and 3B boiler temperature sensor description
3A sensor (NTC 10k ) terminals 1 & 2

3B sensor (NTC 20k ) terminals 3 & 4

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Vitocrossal 200 CM2 186 to 311 Service
Note: The boiler water temperature sensor is located at
the boiler supply connection.
1. Remove spring clip (set aside).
2. Insert 6 in. (150 mm) temperature sensor.
3. Observe the inserted depth.
4. Secure sensor lead with spring clip.
5. Insert the 3A and 3B plug to the burner electrical
connector.