Vaillant HOME REGULAR 12-A Operating Instructions Manual page 5

– The product itself
– 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
1.3.8 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.
1.3.9 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
0020224339_00 HOME Operating instructions
lead to corrosion on the product
and in the air/flue pipe.
▶ Ensure that the supply of
combustion air is always free
of fluorine, chlorine, sulphur,
dust, etc.
▶ Ensure that no chemical sub-
stances are stored at the in-
stallation site.
1.3.10 Cabinet-type casing
Enclosing the product in cab-
inet-type casing requires
compliance with the applicable
design instructions.
▶ Do not fit the casing on the
product yourself.
▶ If you require cabinet-type
casing for the product, consult
an approved heating special-
ist company.
1.3.11 Risk of material
damage caused by
frost
▶ Ensure that the heating in-
stallation always remains in
operation during freezing con-
ditions and that all rooms are
sufficiently heated.
▶ If you cannot ensure the op-
eration, have a competent
person drain the heating in-
stallation.
Safety 1
5