Vaillant VR 81, Supplement Manual

Page: 18 / 28

6 Information on installation and operation
7 Safety instructions and regulations
Installation instructions
6 Information on installation and
operation
The installation, electrical connection, settings at the
appliance and initial commissioning may only be carried
out by a recognised expert technician.
6.1 Intended use
The VR 81 remote control unit is a state-of-the-art device
which has been constructed in accordance with the
standard safety regulations.
However, in the event of improper use or use not as
intended, impairment of the equipment and other items
can arise.
A mixed or unmixed heating circuit can be controlled
remotely by the VRC 430 controller in conjunction with a
Vaillant boiler and eBUS interface using the VR 81 remote
control unit.
Communication with the controller is achieved via a
2-lead bus line (eBUS). Only one VR 81 remote control unit
can be used.
Any other use or use that goes beyond this defined scope
is considered not to be use as intended. The manufacturer
or supplier is not liable for any resulting damage. The
owner alone bears any risk.
Intended use also includes observance of the Operating
and Installation Manual as well as all other applicable
documents.
7 Safety instructions and regulations
The VR 81 remote controlled unit must be installed by a
recognised expert technician company that is also
responsible for ensuring that existing standards and
regulations are observed.
We accept no liability for any damage caused by failure to
observe these instructions.
Use commercially available cables for the wiring.
- Minimum cross-sections of lines: 0.75 mm
2
The following maximum cable lengths must not be
exceeded:
- Bus lines: 300 m
230 V connection lines and bus lines that are more than
10 m in length must be routed separately.
The VR 81 remote control unit may only be installed in dry
rooms.
Free terminals at the appliances must not be used as
support terminals for additional wiring.
Installation instructions VR 81 0020044392_00 14