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6 . H y g i e n i c i n s t r u c t i o n s f o r c o m p l i a n c e w i t h V D I
6 0 2 2
6.1.
General instructions
Basic hygiene-related requirements are outlined in the Chapter 4.2.
The appliance has been manufactured in a hygienic design that complies with all requirements of
the VDI 6022 standard for the hygiene o HVAC device. In order to meet those requirements during
operation it is essential to ensure for the appliance to be operated, maintained, inspected and
cleaned by sufficiently qualified personnel in accordance with instructions contained in the
operation and maintenance manual. It is also essential to ensure for the remaining components of
the HVAC system (HVAC distribution systems, distribution elements, ancillary devices, noise
silencers etc.) to meet all hygienic requirements of the VDI 6022 standard and be operated in
compliance with those requirements.
If long-term high relative humidity (short-term more than 90 % or more than 80 % for three
consecutive days) is likely to occur with the subsequent moistening of filters (e.g. in areas with
frequent fogs, frequent and long rains, flying snow etc.), suitable measures must be taken to
prevent microbiologic growth. Recommended measures include more frequent hygienic checks as
per VDI 6022 or shorter filter replacement intervals. Another option is the preheating of air using
an appropriate control devices, or the appliance must be put out of operation for the period when
filters are at the risk of moistening (if the type of operation allows this).
Air duct including accessories with autonomous regulation of operation is to be connected on the
fresh air supply. Such duct will, in compliance with the regulation VDI 6022, provide for
appropriate treatment of supplied fresh air to prevent air filter from getting wet. In case the duct is
not connected or if it does not include such accessory, the appliance is to be put out of operation
as long as the risk of air filters to get wet persists (thick fog, snowing).
Operators must be familiar with the tasks and functions as well as the individual components of
the appliance.
The appliance must be regularly inspected, cleaned and maintained by sufficiently qualified
personnel (see the following chapter).
Regardless of their qualifications, personnel must undergo hygiene training (see the following
chapter).
The user must be able at any given time to provide evidence as to the qualifications of operators.
If sufficient number of qualified operational and service staff are not available, those activities must
be commissioned to a specialist company that will be responsible for the proper operation of the
appliance.
The user has an obligation to carry out regular hygiene inspections of the appliance every 3 years
(see following chapters).
The appliance must not be operated without air filters. The filter grade of supply fresh air must be
at least ISO ePM1 50% (F7). The filter grade of exhaust air must be at least ISO ePM10 50%
(M5).
If the appliance has been out of operation for a longer period of time, it must be cleaned
thoroughly before recommissioning; if stricter hygienic requirements apply, wiping disinfection
must be carried out.
After disinfecting make sure that no toxicologically suspicious or odour-active substances enter
supply air!
The user has an obligation to appropriately record the appliance's operation (e.g. in the
operational logbook).
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