Installation
52
Connection of the Return Temperature Sensor
Strap-on temperature sensor and immersion temperature sensor
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
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 338 v1.6
17A or 17B
17A or 17B
30 40 50 60 7070 80 90
540
560
580
600
620
640
660
680
700
720
20 100
68 86 104 122 140 158 176 194 212
Return temperature in °C / °F
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