Installation
General safety notes
CAUTION!
Danger of injury from sharp edges, sharp cor-
ners and thin sheet metal parts!
Sharp edges, sharp corners and thin sheet metal
parts may cause cuts or grazes.
–
Be careful when carrying out any work.
–
Wear protective gloves, safety shoes and a
hard hat.
Personnel:
HVAC technician
NOTICE!
Contamination or damage will impair the
function of the damper.
Protect the damper from contamination and
damage.
Please note:
Installation should be vertical and without tor-
sion
Installation only into horizontal ducts, with the
blades horizontal
Installation in vertical ducts only with the
damper opening against gravity (extract air
ducts)
Note the airflow direction
Duct connection on one side or on both sides
(with UL only on one side)
Dampers that are not screw-fixed to the wall or
ceiling slab require suspensions.
The function of the damper must be checked
before installation.
General installation information
Fig. 2: Installation types
①
Ducts on both sides (only with KUL, ARK-1)
②
Without duct (air transfer)
③
Duct on one side (air outlet)
④
Duct on one side (air inlet)
The non-return dampers are installed away from
walls (in ducts), or adjacent to or on the face of
walls and ceiling slabs.
Installation on the discharge side of a fan (only
UL, KUL)
Fig. 3: Upstream section
Turbulence on the discharge side of a fan may
damage the blades of the non-return damper. A
straight upstream section >B+H is hence required
on the discharge side of a fan.
Installation
Non-return dampers Types UL, KUL, WG-KUL, ARK, ARK-1
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