Connection Of The Return Temperature Sensor - Viessmann VITOTRONIC 100 GC1 Installation And Service Instructions Manual

Installation

Connection of the Return Temperature Sensor

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
Return temperature in
52
17A or 17B
17A or 17B
50 60 70 70 80
122 140 158 176
°C / °F
90 100
194 212
For measuring the boiler return
and return temperature.
Electrical connection
The sensor is inserted in socket
"17A" or "17B" on the boiler
control.
Check the sensor
1. Disconnect plug aJA or aJB
in the terminal compartment of
the boiler control.
2. Measure resistance of sensor at
terminals "1" and "2" of the plug.
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 + 70°C
-4 to + 158°F