Checking The 15A And 15B Flue Gas Sensor; Checking The 3A And 3B Boiler Temperature Sensor - Viessmann Vitocrossal 200 CM2 400 Service Instructions Manual

Vitocrossal 200, CM2 400, 500, 620 and 620 TX Service
Steps – Commissioning, Inspection and Maintenance
Temperature
3A sensor (NTC 10k )

Temperature
3B sensor (NTC 20k )

Temperature
Commissioning, Inspection, Maintenance
(continued)

Checking the 15A and 15B flue gas sensor

Viessmann NTC 10 kΩ (blue identification)
Note: The sensor is located on the flue gas collector and
the connecting plug is located at the burner control
unit.
Note: For sensor replacement see page 45.

Checking the 3A and 3B boiler temperature sensor

Note: The sensor is located on the boiler supply
connection and the connecting plug is located
at the burner control unit.
Note: For sensor replacement see page 45.
25