Viessmann Vitotronic 100 GC1 Installation And Service Instructions Manual page 62

Installation – Vitotronic 300-K, MW1S
Sensor connection
(continued)
Strap-on temperature sensor and immersion temperature sensor
740
720
700
680
660
640
620
600
580
560
540
20 30 40
68 86 104
Supply temperature/return temperature in °C / °F
62
2
50 60 70 80 90
122 140 158 176 194 212
100
For measuring the supply temperature.
Electrical connection
Connect in accordance with the
overview on page 58 and 59 and
the control panel wiring diagram.
Remove the plug from the sensor
cable.
Check the sensor
1. Disconnect the sensor from
terminals.
2. Measure resistance of sensor at
terminal "2" of the plug.
Flow/return Resistance
temperature in Ω Ω Ω Ω
in °C / °F
30 / 86 569
40 / 104 592
60 / 140 643
3. Compare the value measured with
the current temperature. If the
value differs significantly, check
installation and, if necessary,
replace sensor.
Technical data
Degree of protection: IP 32
Ambient temperature
during operation:
0 to + 100 °C
32 to + 212 °F
during storage and transport:
–20 to + 170 °C
- 4 to + 158 °F