7
Checking the domestic ventilation system
Danger
The simultaneous operation of
open flue combustion equipment
(e.g. an open fireplace) and the
Vitovent in a space with combus-
tion air interconnection results in
dangerous negative pressure
inside the room. The negative
pressure can result in a return of
flue gases into the room.
■
Never
operate the Vitovent
simultaneously with
open
flue
combustion equipment (e.g.
open fireplace).
■ Only operate solid fuel com-
bustion equipment in
bal-
anced
flue mode with its own
outdoor air and exhaust air
duct.
■ Keep doors to boiler rooms
where the combustion air sup-
ply is not interconnected with
the living space airtight and
shut.
Information regarding the operation
of the Vitovent in conjunction with
open flue combustion equipment
■ Always install an interlock system on
site. In the case of negative pressure
inside the room, the interlock system
(e.g. air pressure switch "P4" made by
Erich Huber, www.luftdruck-
waechter.de) must switch off the
Vitovent.
■ The relevant flue gas inspector must
give his approval [check local regula-
tions].
■ The frost stat circuit must be disabled
and frost protection must be safeguar-
ded by an electric preheater bank
(accessory) or by means of a geother-
mal heat exchanger (on site).
!
Please note
The simultaneous operation of
extractor hoods or tumble dryers
and the Vitovent in interconnec-
ted rooms results in negative
pressure inside the room.
■
Never
link extractor hoods and
tumble dryers into the Vitovent
duct system.
■ Set up extractor hoods in the
kitchen either to recirculate air
or to expel the air to the out-
side.
Recommendation: Recirculat-
ing extractors offer a better
energy balance.
Commissioning, inspection, maintenance
Further details regarding the individual steps
5608 999 GB
