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8. Hygiene
8.1 Ensuring hygiene (VDI 6022)
The regulations require that only inert materi-
als must be used and biocides should only be
used as a last option.
A metal filter made of mesh wire is used as a
aerosol separator.
The aerosol separators can - if necessary -
be easily cleaned and reused. Addition of a
biocide is not required.
All components must be easily accessable in
order to allow for cleaning as required by VDI
6022.
8.2 Automatic flushing
According to VDI 6022, flushing of the sys-
tem is required regularly within a 48 h time
frame if no demand calls for the system ope-
ration. To meet this requirement, the HPS
control initiates automatic flushing every 24
hours in order to prevent microbial contami-
nation in standing water.
In this situation, a momentary increase of
humidity in the air conditioning system may
happen. Thus, in order to warrant the drying
of the air condition system after flushing, the
regular operation must be ensured.
8.3 Air feed for the nozzle
system
The air flow must be laminar, i.e. in case of a
fan installed upstream of the spray system, a
minimum distance of 1.0 m must be obeyed
or other measures must be taken.
Air purity
A pre-filter according to ISO ePM1 50%
(Class F7) is to be placed upstream of the
nozzle system.
Air velocity
0.9...2.8
m/s (ideal conditions)
If the air velocity is outside this range please
contact HygroMatik.
Pressure drop
Pressure drop is approx. 80 Pa (with an air
velocity of 2.0 m/s in a setting of one Vortex
module wall and two dry aerosol separators).
Please note
