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The conformity declaration is rendered invalid if a fan is modified by e.g. adding a frequency
converter or metrology equipment, and the operator must then declare conformity themselves
after risk analysis.
Fan operating temperature may not fall below the lower melting point of the medium being
pumped.
Fluid drainage in the spiral housing must be continuous. The atmosphere in the interior must not
leak out, e.g. through immersion or use of a siphon.
Earth the fans using the earthing points provided.
