Technical data

Additional information
101
System components (continued)
Boiler temperature sensor, Part No. 7450 632 and DHW tank temperature sensor, Part No. 7450 633
Electrical connection
See page 38.
Check the sensor
1. Disconnect plug § / % in the
terminal compartment.
2. Measure resistance of sensor at
terminals ”1” and ”2” of the plug
or ”2” and ”3” (if a second DHW
tank temperature sensor is
connected).
Boiler water/
DHW tank
temperature
in °C / °F
Resistance
in Ω
ΩΩ
Ω
40 / 104
50 / 122
60 / 140
578
597
616
3. Compare the value measured with
the actual temperature.
If the value differs significantly,
check installation and, if
necessary, replace sensor.
Technical data
Degree of
protection: IP 32
Ambient
temperature
During operation:
– boiler temperature sensor:
0 to + 130°C
32 to + 266°F
– DHW tank temperature sensor:
0 to + 90°C
32 to + 194°F
During storage and transport:
–20 to + 70°C
- 4 to + 158°F
Extension kit for heating circuit with mixing valve, Part No. 7183 288 Accessory
Comprising supply temperature sensor as contact sensor for measuring the
supply temperature and mixing valve motor, with 4 m / 13 ft long connecting
cable and plug-in plug for connecting the heating circuit pump.
5285 941 v.1.5
400
0
540
560
580
600
620
640
660
680
700
720
740
760
20 40 60 80 100 120 140
Boiler water/DHW tank temperature in °C / °F
Resistance in
Ω
Ω Ω
Ω
32 68 104 140 176 212 248 284