20
Required interval in calendar
months
Activity
Measures to be
taken
1.
3. 6. 12.
24.
Hyg.
inspec-
tion
6.1
Check for impurities, damage
and corrosion
Cleaning and repair
x
6.2
Check tightness between
exhaust and outdoor air
Repair
x
6.3
Check condensate tray for
impurities, corrosion and
functionality
Cleaning and repair
x
6.4
Check for impurities and
functionality of siphon trap
Cleaning and repair
x
6.5 Check hygienic conditions
x
7
Air duct and noise silencers
7.1
Check accessible sections of
air duct for damage
Repair
x
7.2
Check internal air duct surfaces
at two or three sample points
for impurities and corrosion
Determine cause,
clean relevant air duct
sections
x
7.3
Check noise silencer for
impurities, damage and
corrosion
Repair
x
7.4
Check hygienic conditions of air
duct at sample point
Determine cause,
clean relevant air duct
sections
x
8
Air vents
8.1
Check mounted perforated
metal sheet, wire mesh or
screens (random checks)
Clean or replace
x
8.2
Check around air vents with
room air induction and
extraction air outlets for solid
deposits
Clean
if
need-
ed
8.3
Clean structural parts of
secondary air flow
x
While checking air filters make sure the following is documented (e.g. in the operational logbook):
o
Pressure difference
o
Time of operation
o
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:
o
Inspecting the application and rooms it supplies with the company´s doctor and HR
representative in attendance, with attention paid to apparent deficiencies
o
Measurement of physical climatic parameters (temperature, humidity, air flow rate) at sample
points of the appliance and in the rooms
o
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
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.
