Technical data

138
Components – Vitotronic 100, GC1
Components from the parts list (continued)
Strap-on temperature sensor and immersion temperature sensor
For measuring the boiler 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
temperature
in °C / °F
Resistance
in Ω
ΩΩ
Ω
30 / 86
40 / 104
60 / 140
569
592
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
5351 340 v1.4
17A or 17B
17A or 17B
30 40 50 60 7070 80 90
540
560
580
600
620
640
660
680
700
720
7
4
0
20 100
R
e
s
i
s
t
a
n
c
e
i
n
68 86 104 122 140 158 176 194 212
Return temperature in °C / °F