Regulations (Directives, Laws, Standards) - Vaillant VRA 42 Installationsanleitung

switching off all power sup-
plies (electrical partition with a
contact gap of at least 3 mm,
e.g. fuse or circuit breaker).
▶ Secure against being
switched back on again.
▶ Wait for at least 3 minutes un-
til the capacitors have dis-
charged.
▶ Check that there is no
voltage.
1.4 Qualification
Only qualified electricians may
carry out the electrical installa-
tion.
1.5 Risk of material damage
caused by using an
unsuitable tool
▶ Use the correct tool.
1.6 Safety warning – Power
supply unit
▶ Only use the power supply
unit indoors.
▶ Do not operate the power
supply unit in wet environ-
ments or in the rain.
▶ If the power supply unit has
visible damage or is defect-
ive, you must not operate it.
▶ Keep the power supply unit,
its individual parts and the
packaging material away from
children.
▶ If the power supply cable or
the outer connection cable
on the power supply unit is
0020318510_00 Installation instructions
damaged, it must be replaced
by a qualified electrician.
1.7 Regulations (directives,
laws, standards)
▶ Observe the national regula-
tions, standards, directives,
ordinances and laws.
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