General Safety Information For The Competent Person - Vaillant VR 91f Operating And Installation Instructions

– installing and fitting the
product in accordance with
the product and system
approval
– compliance with all inspection
and maintenance conditions
listed in the instructions.
Intended use also covers in-
stallation in accordance with the
IP class.
Any other use that is not spe-
cified in these instructions, or
use beyond that specified in this
document shall be considered
improper use. Any direct com-
mercial or industrial use is also
deemed to be improper.
Caution.
Improper use of any kind is
prohibited.
1.5 General safety
information for the
competent person
1.5.1 Risk caused
by inadequate
qualifications
The following work must only
be carried out by competent
persons who are sufficiently
qualified to do so:
– Set-up
– Disassembly
– Installation
– Start-up
– Maintenance
0020253110_01 Operating and installation instructions
– Repair
– Decommissioning
▶ Observe all instructions that
are included with the product.
▶ Proceed in accordance with
the current state of techno-
logy.
▶ Observe all applicable dir-
ectives, standards, laws and
other regulations.
1.5.2 Requirements for lines
▶ Use standard commercial
lines for the wiring.
– Minimum cross-section:
≥ 0.75 mm²
– Maximum line length:
≤ 125 m
Safety 1
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