Technical data

81
Installation – Vitocontrol-S, VD2/CT3/CM2
Sensor connection (continued)
DHW tank temperature sensor
The sensor measures the domestic hot
water tank temperature.
Heating systems with domestic hot
water heating (single-boiler systems
only)
1. Install the DHW tank temperature
sensor.
See installation instructions
for domestic hot water tank
Please note:
When installing the sensor in DHW
tanks of other makes, make sure
that the sensor is pressed against
the sensor well of the DHW tank by
means of a suitable device.
2. Ensure that the maximum
permissible domestic hot water
temperature is not exceeded. If
necessary, install a suitable safety
device for this purpose.
Check the sensor
1. Disconnect plug % in the terminal
compartment of the boiler control.
2. Measure resistance of sensor at
terminals ”1” and ”2” of the plug.
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 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 + 90°C
32 to + 194°F
During storage and transport:
-20 to + 170°C
- 4 to + 158°F
Electrical connection
The sensors are ready to plug in. Insert
the DHW temperature sensor in socket
”5” of the boiler control.
Heating systems without domestic hot
water heating
Do not connect the DHW tank
temperature sensor.
5351 340 v1.4
5
Resistance in
0 20 40 60 80 100
540
560
580
600
620
640
660
680
700
720
DHW tank temperature in °C / °F
32 68 104 140 176 212