Airflow Duplexvent Flexi DV1100 Manuale di installazione, uso e manutenzione - Pagina 14

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Check noise silencer for impurities,
8.3
damage and corrosion
Check hygienic conditions of air duct at
8.4
sample point
9
Air vents
Check mounted perforated metal
9.1
sheet, wire mesh or screens (random
checks)
Check around air vents with room air
9.3
induction and extraction air outlets for
solid deposits
Clean structural parts of secondary air
9.4
flow
While checking air filters make sure the following is documented (e.g. in the operational logbook):
 Pressure difference
 Time of operation
 Appearance (check for cracks in filter material and leaks between the frame and mounting wall)
If significant contamination or cracks are present the air filter must be replaced!
Hygiene inspections must be carried out regularly every 3 years. As per the requirements of the VDI 6022 standard the
inspection must include the following steps:
 Inspecting the application and rooms it supplies with the company´s doctor and HR representative in attendance, with
attention paid to apparent deficiencies
 Measurement of physical climatic parameters (temperature, humidity, air flow rate) at sample points of the appliance and in
the rooms
 Inspecting hygienic conditions including specific tapping on filters and heat exchangers
 Checking the total content of Legionella germs (must be carried out by the hygiene authority)
 A written report on the inspection results to the user with recommendations and necessary and required corrective measures
during a business meeting
The total number of Legionella germs must not exceed 1 KBE/ml.
All inspections must be documented
9 . C l e a n i n g a n d m a i n t e n a n c e

9.1 General

●
During the maintenance of the appliance follow instructions from the previous chapters, observe the basic rules of safety at work
and proceed in compliance with the working regulations and use suitable means of access to the HVAC equipment (ladders,
mobile stepladders, platforms etc.).
●
Maintenance consists particularly in the visual inspection of the appliance, a regular replacement of air filters and cleaning the
heat recovery exchanger.
●
Observe personal hygiene during the maintenance of the appliance. We recommend using personal protective equipment (face
masks, rubber gloves etc.).
●
We recommend commissioning the maintenance and cleaning of the appliance to a specialist service company.

9.2 Cleaning the cabinet

●
After opening the door of the unit, vacuum clean all impurities, possibly carryout wiping disinfection.
●
Check the condition of the door seal.
●
Check the condensate drain for cleanliness and flooding. A blocked drain might cause serious
problems.

9.3 Air filters, replacing filter cassettes

●
As standard, the appliance contains outdoor (e1/ODA) and extraction air filters (i1/ETA) , which must be kept dry and clean (for
details see 7.1).
●
The filters are designed to capture dust particles and thus protect your health as well as the other parts of the appliance from
contamination; therefore make sure they are control and replaced regularly!
●
Carry out filter replacement operations only provided that you do not suffer from allergies to dust particles. Avoid replacing filters
when persons with such allergies are present.
●
Replacement is carried out depending on the dust load of the external and internal environment and the subsequent
contamination of filters and an increase in air resistance indicated by the differential manostats every 500 to 2000 running hours.
The filter cassettes are replaced when the final permitted difference between filter pressures or the time interval for replacement
have been reached, or if the filters show technical or hygienic functional defects. Earlier replacement or shorter replacement
intervals are desirable if the results of a hygiene inspection show it appropriate.
When replacing the filter cassettes, avoid the contamination of the surroundings, other air-handling parts of the appliance as well
as the rooms being ventilated. In particular make sure that the newly installed filters have not been contaminated by dust from
the old ones!
Repair
Determine cause, clean
relevant air duct sections
Clean or replace
Clean
14
x
x
If
necessary
x
x