EN / 10-2015 / 1000683
© STULZ GmbH, Hamburg
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74
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Maintenance
STULZUltraSonic-SystemforDirectRoomHumidificationBNB-
11.2. Checklist for hygiene checks in line with VDI 6022
Checklist for hygiene checks in line with VDI 6022
Job to be performed
Necessary measures
Inspection interval*
Plant operator
1x
week
3
months
6
months
Visualinspectionasfollows:
Whenrequired:
X
• Check mist outlets for deposits
Clean
X
• Check transducer for deposits
Inspect, replace if necessary
X
• Check drain/drainage valve
Clean and service
X
• Check air filter
Clean and service
X
• Check integrated BNB
water tray for impurities,
damage, microbial
growth and corrosion
Rinse and dry tray, disinfect, check quality of
supplied water
X
Indicative measurement of colony count
DipslidetestasperVDI6022Page1<10
2
CFU/ml
X
Specialist engineer
1)
Determination of total colony count of
Legionella, Pseudomonas aeruginosa
Qualified sampling
1)
as per VDI 6022 Page1
Colonycount<150CFU/ml
Legionella<100CFU/100ml
Pseudomonasaeruginosa<100CFU/100ml
X
1)
QualifiedsamplingwithinthemeaningoftheDirectivereferstosamplingforthepurposeofriskassessmentatthesystemboundarytotheroom.Itmustentail
expert microbial sampling in accordance with Objective G or DIN EN ISO 19458. If further sampling points
arerequired(e.g.afterreverseosmosis).Ifmicrobialsamplingtoassessthewater-bearingsystemmustbeperformedinaccordancewithObjectiveB
as per DIN EN ISO 19458. A sampling tap will be required for this purpose.
CAUTION
Separate logbook.
All tests and measurements must be documented in a separate logbook.
Note
CAUTION
Shortened inspection intervals.
Ifthespecifiedrecommendedvaluesareexceeded,theinspectionintervalsdescribedheremustbe
halved until the results of inspections are no longer critical and remain so over the long term.
Note
CAUTION
Adjustment of inspection intervals.
If the recommended values are met over a period of at least one year, the inspection intervals can
then gradually be adapted.
Note
CAUTION
Measuring sensor and control unit.
Ultrasonichumidifiersdistributedaroundtheroommustgenerallybeequippedwithacontrolunit.
Note
CAUTION
VDI 6022.
Also see "4.10. Use in conformity with VDI 6022" on page 24.
Note