6.6.3 Notes on cleaning
Cleaning the steam cylinder, lime collector tank, steam cylinder insert
• Whereverpossible,chipoffthelimecoatingthathasformed.
• Washpartswithlukewarmsoapsudsandthenrinseoffwell.
Note: If the components are heavily scaled, place them in 8-percent formic acid until the scale has
dissolved. Then treat components as previously described.
Cleaning the heating elements
• Immersecoverwithheatingelementsttedto2cmbelowtherimofthecoverinacontainerwith
8-percentformicacid.Allowtheacidtotakeeffectuntilthescalecoatinghasdissolved.
Note: The heating elements do not have to be entirely free from scale.
• Thenrinseheatingelementsthoroughlywithfreshwater.
Warning! Ensure that the electrical connections remain dry.
Warning!Onnoaccountremovescalecoatingontheheatingelementswithtools(screwdriver,
scraper,etc.)orbystriking.Thiscoulddamagetheheatingelements.
Cleaning the interior of the unit
Wipedowncomponentsinsidetheunitwithadampcloth(cleanwater).Severelyscaledcomponents,
e.g.theinletfunnelandtheblow-offpump,shouldbecleanedusingcommerciallyavailablecleaning
and descaling agents.
Warning! Ensure that the electrical connections and electronic components remain dry.
Notes on cleaning agents
Diluteformicacidisobtainablefromanychemist’sshopordrugstore.
Warning! Formicacidisindeedharmlesstotheskin,butitattacksthemucousmembranes.
Protecttheeyesandrespiratorytractsthereforefromcontactwiththeacidanditsvapor(wear
gogglesandworkinawellventilatedroomoroutside).
Theuseofdisinfectantsisonlypermittediftheyleavenotoxicresidues.Thecomponentsmust
berinsedthoroughlywithwateraftercleaninginallcases.
Caution! Do not use any solvents, aromatized or halogenized hydrocarbons, or other ag-
gressive substances for cleaning purposes.
The information and instructions regarding cleaning agents are to be unconditionally observed
and implemented. In particular: Information relating to the protection of personnel, environmental
conservation and restrictions regarding usage.
In all cases, local regulations relating to environmental protection must be implemented.
6.6.4 To reset the maintenance indication
Whenmaintenanceworkhasbeencompleted,themaintenance displaycanberesetasfollows:
• With the unit switched off,depressandholdthedrainswitch.
• Switchonthesteam-airhumidierwiththeunitswitch.
• Continuetodepresstheblow-offpushbuttonuntilthesystemtesthasnished(approx.10sec-
onds).