2
1. Cleaning options
Self-cleaning effect
Under the usual conditions for the operation of ventilation systems and air conditioning systems, rotary heat
exchangers do not tend to become contaminated. This is due to the laminar airflow in the rotor mass and the
counter-current circuitry.
Air filtration before the rotor is only necessary for viscous, greasy and coarse contamination. As the self-clea-
ning effect occurs only when the rotor is rotating, idle rotors tend to become contaminated.
A cleaning cycle circuit offers a remedy here. The rotor mass is periodically rotated further in order to prevent
one-sided accumulation. This cleaning run cycle, also described as interval mode, is integrated in the rotor
control system (see control system description for the twist switch – latched controller).
Outside air
Extract air
Supply air
Exhaust air
Counterflow Circuit: