Operation and current Maintenance instructions - laminar flow unit AKCmed

Operation and current Maintenance instructions

Basic information:

· HEPA filters H14 with gel sealing

· Integrated lighting

· Double laminizer fabric

· Replacement of filters without necessity to remove completely the laminizer

· Conformity with DIN standard 1946-4:2008-12

Maintenance of the equipment

① Filters - are to be replaced after the pressure loss is equal to the double of the initial pressure loss (which is to be always measured after new filters are fixed) or not later than the terminal pressure loss determined by the manufacturer is reached. Repeated validations of filters are recommended to be carried out in regular intervals (approx.1 year), apart from possible mechanic damage of the filtration medium, captured microorganisms may also intrude into the clean room subsequently.

Replacement or revalidation of filters can be done after simple opening of laminizers (fixed by quick-closing mechanism). After the clogged filters are removed, seating faces of frames are to be checked and residues of stuck or gel sealing must be clear away. The new filters should be treated carefully in order to prevent any damage of the gel in the filter frame channel.

② Cleaning and disinfection of the Laminar field inside parts – having the laminizer been opened, the main pressure chambers are accessible and their surfaces may be treated with common detergents and disinfectants. Varnished surface is adequately resistant to even aggressive substances. Disinfectant may not be sprayed directly onto electric equipment. Their chemical aggressiveness may cause corrosion with subsequent short circuit.

③ Fluorescent lighting. Review and replacement of fluorescent tubes are done after opening of the both laminizers. Powerful tubes T5 are very reliable and they have long service life. The maximum decrease of light output is 5% for the service live period. Individual tubes which do not emit light may be defective. In case the both tubes of one light fitting do not emit light, the electronic ballast may be defected.

④ Laminizers double execution of the laminizer fabric ensures stable and firm tightening by means of quick-closing mechanism. The laminizer fabric has sufficient tensile strength but is not resistant to damage of surface fibres by a sharp thing. All handling has to be carried out carefully and with clean hands only. Cleaning of the laminizer fabric is not necessary since the sterile passing air is already fully filtered and no contamination takes place. However the surface of the laminizer fabric is resistant to all common detergents and disinfectants as well. Anyway the inside surface of the fabric cannot be treated and the space between individual fibres may not be cleaned efficiently either. The water getting dry after cleaning may form a scale which clogs a part of laminizer fabric. In case the laminar fabric is accidentally and strongly contaminated (e.g. by spouting blood) the cloth has to be replaced by sticking a new one (picture).