Recovery System; Functional Overview - Nilfisk-Advance 34 RST EcoFlex Service Manual

Recovery System

Recovery System

Functional Overview

See Figure 1. Dirt and water are lifted off the floor into the recovery tank by airflow created by a three-stage 36V
vacuum motor. The wastewater and air enter the vacuum system at the squeegee tool through small openings
(notches) in the front squeegee blade. The small openings are the entrance points for the water and air and help
speed up the airflow, producing the suction to lift the wastewater off of the floor. The air and wastewater move
through the squeegee hose at high speed until the wastewater reaches the recovery tank. There the air slows down
because of the increased volume (large size) of the tank. With the decreased air speed, the heavier water falls to the
bottom of the recovery tank. The airflow continues through the tank, vacuum fan inlet screen and vacuum motor,
and is exhausted out of the vacuum exhaust hose. No wastewater ever actually moves through the vacuum motor,
just the working air.
The vacuum system uses a float switch to prevent the tank from being overfilled and stops any water from being sucked into the vacuum motor.
FIGURE 1
48 - FORM NO. 56043115 - 34 RST