Vaillant HOME SYSTEM 12 -A Operating Instructions Manual page 5

▶ In order to operate the
product, ensure that the con-
densate siphon is always full.
1.3.6 Risk of death due to
explosive and flammable
materials
▶ Do not use or store explosive
or flammable materials (e.g.
petrol, paper, paint) in the in-
stallation room of the product.
1.3.7 Risk of death due to lack
of safety devices
A lack of safety devices (e.g.
expansion relief valve, expan-
sion vessel) can lead to poten-
tially fatal scalding and other
injuries, e.g. due to explosions.
▶ Ask a competent person
to explain how the safety
devices work and where they
are located.
1.3.8 Risk of death due
to changes to the
product or the product
environment
▶ Never remove, bridge or
block the safety devices.
▶ Do not alter the safety
devices in any way.
▶ Do not damage or remove
any seals on components.
▶ Do not make any changes:
– The product itself
0020224356_00 HOME Operating instructions
– to the gas, air, water and
electricity supplies
– to the entire flue gas install-
ation
– to the entire condensate
drain system
– to the expansion relief valve
– to the drain lines
– to constructional condi-
tions that may affect the
operational reliability of the
product
1.3.9 Risk of injury and
material damage due to
maintenance and repairs
carried out incorrectly or
not carried out at all
▶ Never attempt to carry out
maintenance work or repairs
on your product yourself.
▶ Faults and damage should
be immediately rectified by a
competent person.
▶ Adhere to the maintenance
intervals specified.
1.3.10 Risk of corrosion
damage due to
unsuitable combustion
and room air
Sprays, solvents, chlorinated
cleaning agents, paint, adhes-
ives, ammonia compounds,
dust or similar substances may
lead to corrosion on the product
and in the air/flue pipe.
Safety 1
5