Vaillant VED Operating And Installation Instructions page 13

Risk of death from electric shock from live lines and
connections!
During all work on the open unit, particularly on electri-
cal lines and connections, there is a risk of death from
electric shock.
> When working on the open unit, interrupt the power
supply. The unit must be de-energised.
> Check that the unit is de-energised.
> Ensure that the power cannot be restored inadvert-
ently to the unit while you are working on it.
Risk of death from electric shock from live lines and
connections!
The drinking water used must demonstrate resistance
greater than or equal to 900 ohm at 15 °C. Otherwise,
the unit must not be used.
> Before installing the unit, ask your water company to
inform you about the water resistance and conductivity.
Risk of being scalded by hot water!
The outlet temperatures at the draw-off points can be
up to 60 °C.
> Inform the operator that there is a risk of scalding
due to high outlet temperatures, especially when the
VED is set to stage II.
> Recommend to the operator that, in normal operating
mode, the output selector is set to level I to avoid
scalding.
Material damage inside the unit caused by poor
quality water
A VED electric instantaneous water heater must only be
used to heat up drinking water. This potable water must
meet the specific German or Austrian legal requirements
for quality. Otherwise, it is not possible to rule out the
risk of corrosion inside the unit.
Material damage due to improper use and/or
unsuitable tools
Improper use and/or the use of unsuitable tools may
result in material damage (e.g. water leaks).
> Always use a suitable open-end spanner to tighten or
undo threaded connections.
> Do not use pipe wrenches, extensions, etc.
Installation instructions for VED electric instantaneous water heater 0020149586_00
Risk of frost.
If a VED electric instantaneous water heater is placed
out of operation for a relatively long period of time in an
unheated room in cold weather, the water in the unit and
pipes may freeze.
> Install the VED electric instantaneous water heater in
a permanently frost-free room.
> Store the VED electric instantaneous water heater in
a permanently frost-free area.
Material damage to the appliance caused by changes
No changes must be made to the VED.
> Do not make any changes to the unit yourself.
> Inform the operator that they must not make any
changes to the unit or to the electricity lines or water
pipes.
In the event of a fault
> Read the "Detecting and rectifying faults" section to
find out what you must do in the case of fault.
> Inform the operator that they must not attempt to
repair the unit under any circumstances.
> Inform the operator that they must not remove the
unit cladding.
Safety 2
5