Technical data

Installation
28
Connection of the return temperature sensor
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
5285 941 v.1.5
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