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11. Hygiene checklist
Maintenance
Regularly check that the ventilation unit is functioning correctly.
Replace the air filters in the unit at least once a year.
Wear a suitable dust mask when handling the air filters. Dispose of the air filters
in accordance with local regulations.
Activity
Action
if required
1
month
3
months
6
months
12
months
24
months
Hygiene inspection
X
Outdoor air vents
Check for contamination, damage and
corrosion
Clean and
repair
X
Structural units / unit casing
Check for contamination, damage and
corrosion on the air side
Clean and
repair
X
Check for condensation
Clean
X
Check casing for contamination, damage
and corrosion
Clean and
repair
X
Air vents
Check air vents, integral perforated plates,
wire mesh or strainers for contamination,
damage and corrosion (spot check)
Clean or
replace
X
Spot check filter fleeces
Replace
X
Spot check air vents with indoor air
induction and extract air intakes for
deposits
Clean
X
Air filters
Check for impermissible contamination,
damage (leaks) and odours
Replace affected air filters
(never operate the system without filters)
X
Longest filter replacement interval
X
Air ducts
Check accessible air duct sections for
damage
Repair
X
Check inner air duct surface for
contamination, corrosion and condensation
at two or three representative points
Inspect the duct network at additional
points and decide whether cleaning is
necessary (not only the visible areas)
X
Silencers
Check silencers for contamination, damage
and corrosion
Repair or replace; contact test if required
X
Fan
Check for contamination, damage and
corrosion
Clean and
repair
X
Heat exchanger (including heat recovery)
Visual inspection of air/air plate heat
exchanger for contamination, damage and
corrosion
Visual inspection
X
Clean, remove if necessary (undo spacer and
clean out countercurrent heat exchanger)
X
Heating coil: Check for contamination,
damage, corrosion and tightness
Clean and repair
X
Check condensate pan for contamination,
corrosion, damage and tightness
Clean and repair
X
Check the function of the drain and trap
Clean and repair
X
Hygiene checklist (extract from VDI 6022, sheet 1)
System commissioned: Date __________________________
Repairs
Only qualified personnel may remove faults or repair damage.
Only replace faulty components with original Wolf spare parts.
