Vaillant VR 52, Operating And Installation Instructions, Page: 18 / 32

System and product description
18 Operating and installation instructions 0020249211_03
3
unit is 1% of an hour (i.e. 36 seconds in
1 hour). The product complies with this
directive.
In normal mode, the duty cycle limit is not
normally reached. In individual cases, e.g.
during start-up or the new installation of a
system, increased and radio-intensive pair-
ing processes may mean that this limit is
not reached. If the duty cycle limit is
exceeded, the signal LED lights up red for
one extended period and may indicate that
a function is temporarily missing from the
product. After a short time (max. one
hour), the product’s function is restored.
3.6 CE marking
The CE mark shows that the products
comply with the basic requirements of the