Volumetric flow controller VAQS
®
08/23 - 4
Construction subject to change.
No return possible!
09.05.2019
Version:
Field of application
When installing volumetric flow controllers, for example in roof
central units, in extreme cases, condensation can build up in the
measuring pipes of the volumetric flow controller as a result of
the large temperature differences between the air flowing
through the volumetric flow controller and the surrounding air.
This condensation can affect the measuring element. In these
cases, care must be taken that the casing of the volumetric flow
controller and the measuring pipes are insulated, thus avoiding
condensation.
Installation
Installation information
To avoid unnecessary controller errors, the min. distances ac-
cording to the following table / drawings must be observed. For
combinations of several connection pieces or pieces with fire
dampers or silencers, the larger minimum distances must be
observed.
All volumetric flow controllers can be assembled with horizontal
or vertical damper axis.
Installation information for VAQS
®
Distance to a bent connection spigot
Distance to other connection pieces
(e.g. branching piece, reducing piece, T-junction, etc.)
Distance to a fire damper
Distance to a silencer
- for supply and return air systems
- for constant or variable volumetric flows
- Positive control V
min
, V
max
, "OPEN" or "CLOSED"
- Suitable for constant and variable volumetric flow or duct
pressure control
- differential pressure range from 20 to 1000 Pa
- for duct velocities of 1 - 12 m/s
- for ambient temperatures of 0 - 50°C
Distance to:
VAQS
®
Connection piece with bend
1 x diagonal
other connection pieces: (e.g. T-junction,
branching piece, reduction piece, etc.)
2 x diagonal
Fire damper:
2 x diagonal
Silencers:
2 x diagonal
min.
1 x diagonal
at least 2 times the diagonal
at least 2 times the diagonal
at least 2 times the diagonal
