Vaillant ecoTEC plus VUI Series Installation And Maintenance Instructions Manual page 5

▶ Do not use naked flames (e.g. lighters,
matches).
▶ Do not smoke.
▶ Do not use any electrical switches, mains
plugs, doorbells, telephones or other com-
munication systems in the building.
▶ Close the emergency control valve or the
main isolator.
▶ If possible, close the gas stopcock on the
product.
▶ Warn other occupants in the building by
yelling or banging on doors or walls.
▶ Leave the building immediately and ensure
that others do not enter the building.
▶ Alert the police and fire brigade, and in-
form the emergency service department of
the gas supply company as soon as you
are outside the building.
1.3.2 Flue gas
Flue gases may cause poisoning, while hot
flue gases may also cause burns. Flue gases
must therefore never be allowed to escape
uncontrollably.
What to do if you smell flue gas in the prop-
erty:
▶ Open all accessible doors and windows
fully to provide ventilation.
▶ Switch off the product.
▶ Check the flue gas routes in the product
and the flue gas diversions.
To prevent flue gas exit:
▶ Only operate the product if the air/flue pipe
has been completely installed.
▶ With the exception of short periods for
testing purposes, only operate the product
when the front casing is installed and
closed.
▶ In order to operate the product, ensure that
the condensate siphon is always full.
– Water seal level for units with condens-
ate siphon (third-party accessory):
≥ 200 mm
To ensure that the seals are not damaged:
▶ Instead of grease, use only water or com-
mercially available soft soap to aid installa-
tion.
0020308121_04 Installation and maintenance instructions
1.3.3 Air supply
Unsuitable or insufficient combustion and
room air may lead to material damage, but
also to life-threatening situations.
▶ Use the data plate, to check the unit types
(air/flue gas) for which the product is ap-
proved:
– Unit type B = open-flued combustion
air supply
– Unit type C = room-sealed combustion
air supply
▶ If the product has the approval for unit type
B and you want to operate the product as
open-flued, ensure that the air supply to
the product's installation room is perman-
ently unobstructed and sufficient in accord-
ance with the relevant ventilation require-
ments. This also applies, in particular, for
cupboard installations.
To prevent corrosion on the product and in
the flue system:
▶ Ensure that the combustion air supply is
free from sprays, solvents, chlorinated
cleaning agents, paint, adhesives, am-
monia compounds, dust or similar sub-
stances.
▶ Ensure that no chemical substances are
stored at the installation site.
▶ If you are installing the product in
hairdressing salons, painter's or joiner's
workshops, cleaning businesses or similar
locations, choose a separate installation
room in which the room air is technically
free of chemical substances.
1.3.4 Air/flue pipe
The heat generators are system-certified
together with the original air/flue pipes.
▶ Only use original air/flue pipes from the
manufacturer.
1.3.5 Electricity
The power supply terminals L and N remain
live.
To prevent electric shocks, proceed as fol-
lows before working on the product:
▶ Disconnect the product from the power
supply by switching off all power supplies
at all poles (electrical partition with a con-
tact gap of at least 3 mm, e.g. fuse or cir-
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