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Installation Instructions VRC 430 0020042468_024
2.3 Intended use
The VRC 430 weather compensator is a state-of-the-art
appliance constructed in accordance with recognised
safety regulations.
However, damage and property may occur if the unit is
used improperly or for a purpose other than the intend-
ed purpose.
The VRC 430 controller is designed for use as a weather
compensator and timer-based controller with or without
hot water generation/ circulation pump in conjunction
with a Vaillant heating unit with eBUS interface.
Operation with the following accessories is permitted:
Circulation pump for hot water generation in conjunc-
tion with a multi-functional module 2 of 7
Conventional domestic hot water cylinder
Vaillant layer hot water storage tank actoSTOR
Second heating circuit using the Vaillant Mixer
Module VR 61
Solar unit using the Vaillant Solar Module VR 68
VR 81 remote control device
Any other or extended use is considered to be use other
than intended. The manufacturer or supplier is not liable
for any resulting damage. The owner alone bears any
risk.
Intended use also includes observing the operating and
installation instructions and all other applicable docu-
ments.
3 Safety instructions and regulations
The controller must be installed by a suitably qualified
expert technician, who is responsible for observing ex-
isting standards and regulations. We accept no liability
for any damage caused by failure to observe these in-
structions.
3.1 Safety information
e
Danger!
Live connections!
There is a danger to life from electrocution
when working on the electronics box of the boil-
er.
Switch off the power supply to the electronics
box of the heating unit and secure against re-
connection before carrying out any work.
Only open the electronics box if the heating
unit is disconnected from the power source.
3.2 Regulations
During the electrical installation, observe the VDE and
EVU regulations.
Use standard commercial cables for wiring.
Minimum cross-section for sensor and Bus lines:
0.75 mm
2
Do not exceed the following maximum wire lengths:
Sensor lines 50 m
eBUS lines 300 m
If sensor and eBUS lines run parallel with 230 V cables
for more than 10 m, they must be laid separately.
Do not use free terminals of the appliances as support
terminals for other wiring.
The controller may only be installed in dry rooms.
All wiring must be in accordance with Building Regula-
tions Part P and BS 7671 (IEE Wiring Regulations), and
must be carried out by a suitably qualified person.
2 Description of the appliance
3 Safety instructions and regulations
24


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