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Activity
Check for impurities, damage
6.1
and corrosion
Check tightness between
6.2
exhaust and outdoor air
Check condensate tray for
6.3
impurities, corrosion and
functionality
Check for impurities and
6.4
functionality of siphon trap
6.5 Check hygienic conditions
7
Air duct and noise silencers
Check accessible sections of
7.1
air duct for damage
Check internal air duct surfaces
7.2
at two or three sample points
for impurities and corrosion
Check noise silencer for
7.3
impurities, damage and
corrosion
Check hygienic conditions of air
7.4
duct at sample point
8
Air vents
Check mounted perforated
8.1
metal sheet, wire mesh or
screens (random checks)
Check around air vents with
room air induction and
8.2
extraction air outlets for solid
deposits
Clean structural parts of
8.3
secondary air flow
While checking air filters make sure the following is documented (e.g. in the operational logbook):
Pressure difference
o
Time of operation
o
Appearance (check for cracks in filter material and leaks between the frame and mounting
o
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
o
representative in attendance, with attention paid to apparent deficiencies
Measurement of physical climatic parameters (temperature, humidity, air flow rate) at sample
o
points of the appliance and in the rooms
Inspecting hygienic conditions including specific tapping on filters and heat exchangers
o
Checking the total content of Legionella germs (must be carried out by the hygiene authority)
o
A written report on the inspection results to the user with recommendations and necessary
o
and required corrective measures during a business meeting
The total number of Legionella germs must not exceed 1 CFU/ml.
All inspections must be documented.
Measures to be
taken
Cleaning and repair
Repair
Cleaning and repair
Cleaning and repair
Repair
Determine cause,
clean relevant air duct
sections
Repair
Determine cause,
clean relevant air duct
sections
Clean or replace
Clean
Required interval in calendar
months
1.
3.
6.
12.
x
x
x
x
x
x
x
x
if
need-
ed
x
Hyg.
24.
inspec-
tion
x
x
20
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