Vaillant MultiMatic 700/2, Product Training

Page: 93 / 112

multiMATIC 700/2
Notes
10/2015 89 Training 0020228700_00
5.1.4 Installing and connecting the VR 71 module
The VR 71 accessory may be required depending on the design of the heating installa-
tion. It is installed close to the components in the installation using the fastening mate-
rial provided.
5.1.4.1 Terminal assignment for the VR 71 module
VR 71 printed circuit board
On contacts "S12" and "S13", "I" stands for Input and "O" for Output.
On outputs "R7/8", "R9/10" and "R11/12", "1" stands for Open and "2" for
Closed.
Since the VR 71 is used as a source of power for the eBUS, it is necessary to
ensure that the polarity for the eBUS connection between the heat generator
and VR 71 is correct ("+" at "+" and "-" at "-").