Flue Gas Temperature Sensor - Viessmann Vitotronic 300 Installation And Service Instructions Manual

Additional information
System components (VD2/VD2A/CT3 only)
Flue gas temperature sensor, Part No. 7450 630
1020
980
940
900
860
820
780
740
700
660
620
580
540
500
120 160 200 240 280
0 40 80
104 176 248 360 392 464 536
32
Flue gas temperature in °C / °F
104
See page 48 for CM2 flue gas
temperature switch.
(continued)
The sensor measures the flue gas
temperature and monitors the
selected limit value.
Electrical connection
The sensor is inserted in socket
"15" on the boiler control.
Check flue gas temperature sensor
1. Disconnect plug aG in the
terminal compartment of the
boiler control.
2. Measure resistance of sensor at
terminals "1" and "2" of the plug.
Flue gas
temperature
in °C / °F
180 / 176
160 / 320
200 / 392
3. Compare the value measured
with the actual temperature. If
the value differs significantly,
check installation and, if
necessary, replace sensor.
Technical data
Degree of
protection:
Ambient temperature
during operation:
–20 to + 600°C
32 to + 1112°F
during storage and transport:
–20 to + 70°C
–4 to + 158°F
Accessory
Resistance
in Ω Ω Ω Ω
650
800
880
IP 60