Recovery System; Functional Overview - Nilfisk-Advance Convertamatic 24 Service Manual

RECOVERY SYSTEM

FUNCTIONAL OVERVIEW

Vacuum / Recovery System General
Dirt and water are lifted off the fl oor into the recovery tank by airfl ow, created by a 3-Stage 24V vacuum motor. The wastewater and air enter the vacuum system
at the squeegee tool, through small openings (notches) located in the front squeegee blade. The small openings are the entrance points for the water and air, and
help speed up the airfl ow producing the suction to lift the wastewater off of the fl oor. The air and wastewater move through the squeegee hose at high speed until it
reaches the recovery tank. There the air slows down because of the increased volume (large size) of tank. With the decreased air speed the heavier water falls to
the bottom of the recovery tank. Then at the same time the airfl ow continues through the tank, vacuum fan inlet screen, vacuum motor and is exhausted out of the
vacuum exhaust acoustic foam. No wastewater ever actually moves through the vacuum motor, just the working air.
The vacuum system uses a fl oat switch to prevent the tank from being overfi lled and stops any water from being sucked into the vacuum motor.
FIGURE 1
revised 5/07
28 - FORM NO. 56043098 - Convertamatic 24, 26, 28, 32 / BA 625, 725, 825
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