Page 459 - 3K_e-Catalogue 2018
P. 459
UNIDIRECTIONAL FILTER CEILINGS
8.2 MAINTENANCE ON THE AIR FILTERS OF THE AMBIENT AIR RECIRCULATION SYSTEM
WARNING!
THE FILTERS ARE NON-REGENERABLE. THE FILTERS USED MUST BE DISPOSED OF AS
SPECIAL WASTE IN ACCORDANCE WITH LOCAL REGULATIONS.
Given the crucial importance of the filters, you must be careful that they have been placed
in special packaging and have not been subject to any type of impact or damage.
It is advisable to replace with original pieces only. Filters that do not conform to the
original filters may not be compatible with the unit performance and cause operating
problems.
WARNING!
The instructions below are solely indicative.
Always refer to the local regulations or to the relevant Authorities with regards
maintenance in the hospital facility in order to define the correct maintenance schedule
of absolute filters.
The air filters of the ambient air recirculation system are non-regenerable and must be replaced. An adhesive label
must be affixed on the spare filters with the replacement date so as to always have a rough idea of the remaining life of the filter itself.
The degree of clogging of the filters can be detected by the pressure drop of the filter bench. For this purpose a differential
pressure sensor with an adjustable threshold can be installed.
Detect the correct differential pressure value by positioning the positive pressure intake upstream of the filters (inside the
plenum) and the negative pressure intake in the ambient.
Filters clogging level
Filter type Value [Pa]
Airfilters of the ambient air 300
recirculation system
In any case it is advisable to replace all filters every twenty-four months (2 years).
Replace the filters as follows:
1) Access the plenum of the air recirculation system.
2) Open the tabs of the filter supports.
3) Gently pull the filter until it is removed from the support.
4) Place the new filters inside the support by joining them to the seal.
5) Place the adjustable tabs of the supports in order to keep the filter in place
30 TECHNICAL MANUAL
