Nilfisk-Advance CMAX 28/34ST Service Manual

Contents

Nilfisk-Advance CMAX 28/34ST Service Manual Manual pdf 34 page image

FORM NO. 56043071 CMAX ™ 28/34ST / I-MAX™ 28/32C, BA 750/850ST, BA 750C - 33RECOVERY SYSTEMDrain HoseSqueegeeVacuum ExhaustHoseVacuum MotorCover GasketRecoveryTank CoverRecovery TankSqueegee HoseFloat Cage & BallFloat DuctFUNCTIONAL OVERVIEWVacuum / Recovery System GeneralDirt and water are lifted off the floor into the recovery tank by airflow, created by a 3-Stage 24V or 36V vacuum motor. The wastewater and airenter the vacuum system at the squeegee tool, through small openings (notches) located in the front squeegee blade. The small openings arethe 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 andwastewater move through the squeegee hose at high speed until it reaches the recovery tank. There the air slows down because of the increasedvolume (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 theairflow continues through the tank, shutoff float, vacuum motor and is exhausted out of the vacuum exhaust hose. No wastewater ever actuallymoves through the vacuum motor, just clean air.The vacuum system uses a shutoff float to prevent the tank from being overfilled and stops any water from being sucked into the vacuum motor.FIGURE 1Note: Figure 1 shows the vacuum recovery components of the CMAX™ 28ST, BA 750ST and BA 850ST. Similar components are found on theCMAX ™ 34ST, I-MAX™ 28C, I-MAX™ 32C and BA 750C.