Dantherm HCV4 User Manual page 15

Preventive maintenance,
Cleaning Keep the unit clean to ensure reliable operation and proper hygiene.
If the unit is dirty (for example around the filter openings), it must be cleaned using a
thoroughly wrung-out cloth dipped in lukewarm water and, if necessary, detergent.
Important: Chemical solvents must not be used!
Guarantee condi- The factory guarantee is only valid with documented preventive maintenance. Mainte-
tions nance must have been carried out at intervals of a minimum of six months. The docu-
mentation must be in the form of a written log/journal.
Consult the "Preventive maintenance" section in the installation and service guide to see
what type of preventive service must be performed.
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continued