Air connection
The diffuser has a spigot to connect it to the
ducting. Variants with a double lip seal allow for a
sufficiently tight connection; additional sealing is not
required.
Commissioning, maintenance and cleaning
Initial commissioning
Before you start commissioning:
Check that the air terminal devices are cor-
rectly seated.
Remove protective films, if any.
Ensure that all air terminal devices are clean
and free from residues and foreign matter.
Check that electrical connections (if any) have
been correctly made.
Ensure that the device has been correctly fixed
and connected to the ducting.
For commissioning see also VDI 6022, part 1 – 'Hy-
giene requirements for ventilation and air-condi-
tioning systems and units'.
Volume flow rate balancing
When several diffusers are connected to just one
volume flow controller, it may be necessary to bal-
ance the volume flow rates.
Slot diffusers with plenum box and damper blade
(variant -M): The damper blade can be adjusted
even after the diffuser face has been installed.
VSD15, VSD35, VSD50, VSD35-Varyset
Fig. 10: Setting the damper blade, e.g. with a
screwdriver
Move the air control element near the spigot in such
a way that it is possible to insert a screw driver.
VSD50-1-LT
Fig. 11: Setting the damper blade, e.g. with a
screwdriver
Commissioning, maintenance and cleaning
Air terminal devices Slot diffusers, Type VSD...
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