Vaillant flexoTHERM exclusive VWF 117/4 Installation And Maintenance Instructions Manual page 23

8.4.8 Connecting the temperature sensor for
an external domestic hot water cylinder
(optional)
1
2
▶
Connect the cable on the VR 10 temperature sensor
supplied as an accessory to bush (1) on plug (2). Use
a strain relief which does not have a mains voltage line
running through it.
0020213394_01 flexoTHERM exclusive Installation and maintenance instructions
Electrical installation 8
23