30 - EN
5.7 Maintenance of the condensation drain
Inspect the condensation drain at least once every 4 years.
1
Example siphon
2
Example siphon
3
Disconnect the condensation drain. Perform the next checks on the
condensation drain siphon:
■ Check whether the drain is still
open by adding water to the siphon;
■ Visually inspect the condensation
drain for contamination;
■ Check if the seal of the
condensation drain is air tight. Air
must not pass through or by the
siphon.
Resolve any observed problems.
5.8 Maintenance of the air ducts
Inspect the air ducts at least once every 4 years.
1
Example valve Example grille
2
Example air duct
3
Remove the valves and/or grilles.
Zehnder recommends noting
down the setting and location
before removal.
Perform the next checks on the air
ducts:
■ Pollution (dirt and grease);
■ Air leakage (loose joints);
■ Resistance (bends, dents and
blocked valves);
■ Valves and/or grilles.
Resolve any observed problems.
With nominal use the exhaust duct must be cleaned every 4 years and the supply duct every 8 years.
1
Example brush
2
Example vacuum cleaner
Loosen the dirt. Remove the dirt with a vacuum cleaner
or filter box.
Do not use the unit to remove
the dirt from the air ducts. The
dirt can damage the unit or
furniture in the dwelling.
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