UNIPRODO UNI WS 5000PLUS Bedienungsanleitung Seite 37

3. You should hear air flow in the drain hose. It indicates air is being drained from
the purification filter.
CAUTION! Regeneration cycles are shown on the display along with the time
remaining in the cycle.
2.5.2. Backwash the softening filter (takes approximately 2 minutes):
Press the button again so that the control valve is in the position
1.
corresponding to the softening filter backwash.
2. Slowly, unscrew the same valve to the end.
2.5.3. Drawing salt solution from the brine tank and bed formation rinse (slow
rinse) (takes about 10 minutes):
This step is not necessary during first use.
Press the button so that the control valve is in the position for collecting
1.
the salt solution.
2. The salt solution in the brine tank is absorbed by the softening filter to
regenerate the ion exchange resin.