fisair HEF7 Series, Installation And Maintenance Manual

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HEF7 series manual 31
16.2.2. Scale formation process
Mains water is not pure as it contains dissolved calcium and magnesium salts (among others) that can be deposited in
the form of scale. These salts can clog and harden the inorganic panel and make its water absorption more difficult,
thus decreasing performance. If this occurs, the panel should be replaced.
16.2.3. Desinfection
The use of chemical disinfectants for daily maintenance of the panels is not recommended as it may reduce their
efficiency and useful life. If chemical products need to be used, because of a long time without operation or any other
reason, an effective method is to immerse the panels in a chlorine-based disinfectant, such as sodium hypochlorite
(bleach) or sodium peroxycarbonate. If chlorine-based disinfectants are used, they should not be mixed with an acid
solution due to the potential formation of toxic chlorine gas.
Remark:
The manufacturer’s safety steps for the disinfectant solution should be followed.
The inorganic high efficiency panel the HEF2 Series cassettes includes agents, such as silver ions, that inhibit the
growth of bacteria and fungi. This works against bacteria and mold, but not as a sterilizing agent.
The same bleach disinfectant solution may be appropriate to disinfect the other components. The number and periods
of application of the disinfection processes must be established by the person responsible for the facility, taking into
account the time of use of the equipment, its location, piping system and water quality, for example.
Therefore, good operating practices, based mainly on an adequate control of the bleed-off system and
watering/emptying, should be followed.
An additional and highly recommended practice would be to treat to the humidifier supply water.