Vaillant VR 920 Safety & Instruction Manual page 4

1 Safety
1.2 Risk caused by
inadequate qualifications
Applicability: Not for Russia
The following work must only
be carried out by competent
persons who are sufficiently
qualified to do so:
Applicability: Russia
The following work must only be
carried out by competent per-
sons who have been authorised
by Vaillant Group Russia and
who are sufficiently qualified to
do so:
– Set-up
– Dismantling
– Installation
– Start-up
– Inspection and maintenance
– Repair
– Decommissioning
▶ Proceed in accordance with
current technology.
1.3 Risk of death from electric
shock
There is a risk of death from
electric shock if you touch live
components.
Before commencing work on
the product:
▶ Unplug the mains plug.
▶ Or disconnect the product
from the power supply by
switching off all power sup-
2
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
until 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 Observing the safety
information
Applicability: Russia
OR Ukraine
▶ Observe the safety informa-
tion in the section "Country-
specific information".
1.7 Safety information –
Power supply unit
▶ Only use the power supply
unit indoors.
▶ Do not operate the power
supply unit in wet rooms or
in the rain.
Safety instructions 0020253127_02