User`s manual

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c ) P r e - f i l t e r s (e x p a n d e d m e t a l m e s h )
1 Disconnect the hot air unit from power supply by switching off the upstream circuit breaker.
2 Open the door.
3 Slide out the filter, wash it with warm water (max. 60-70°C) with detergent and let it dry (can be cl eaned in a
dishwasher). Slide back in Slide out the filter, wash it with warm water (max. 60-70°C) with detergent and let it dry
(can be cleaned in a dishwasher). Slide back in.
4 Close the door. Re-connect the hot air unit to power supply by switching on the circuit breaker.
Cl eaning the hea t recover y excha nger
Provided that proper maintenance and filter cassette replacement are carried out, the heat recovery exchanger does
not have to be cleaned very often. Clean only when heat-exchange surfaces have been stained. Cleaning should be
done approximately once every 4-5 years of operation.
Cleaning the heat recovery exchanger of DUPLEXVENT RA3 hot air units
1 Disconnect the hot air unit from power supply by switching off the upstream circuit breaker.
2 Open the door.
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