SECTION TWO – OPERATION
49-166 Rev D
Dri-Eaz HVE Large Loss
Page | 13
UNDERSTANDING THE SYSTEMS
NOTE: Read and understand this section of the manual entirely before proceeding.
Prior to proceeding into the operations and maintenance sections of this manual it is recommended that
you acquire a basic understanding of how the unit functions.
VACUUM SYSTEM
The flow of vacuum is initiated by the vacuum pump, which draws air through the recovery tank. A
mixture of air and water is drawn into the recovery tank through a vacuum inlet near the front of the
machine. Behind this inlet is a pre-filter box, which contains a strainer basket to stop the majority of
larger debris from entering the recovery tank. The air and water continue to the recovery tank to a
secondary strainer basket. Here in the recovery tank, water and air separate. Water is deposited into
the recovery tank while the air exits through a 100 mesh filtration system, into the vacuum pump. A
relief valve is installed for vacuum pump protection.
The air is discharged from the vacuum pump through a spiral silencer which then exits through the
exhaust pipe on the front of the unit.
A high level shut off sensor is located on the front of the recovery tank and will shut down the unit
before the tank is at full capacity. This protects the vacuum pump from water damage.
Note: Recovery tank high level shut off will not shut the unit off due to high levels of foam.
Do not alter the vacuum speed outside the recommended range shown in this manual. Doing so can
result in severe damage to the unit and voidance of warranty.
Recovery tank level shut-off will not detect high foam levels. Foam entering the vacuum pump can
cause damage to the unit. The use of a quality defoamer is recommended.
A red indicator lamp will illuminate to alert the operator when the tank is full, the unit will shut down
and the waste water needs to be disposed of before the operation can continue.
IN ACCORDANCE WITH EPA, STATE AND LOCAL LAWS, DO NOT DISPOSE OF WASTE WATER INTO
GUTTERS, STORM DRAINS, STREAMS, RESERVOIRS OR ANY NON-COMPLIANT RECEPTACLE.
Always check local laws and regulations regarding “gray” water disposal. The penalties for non-
compliance can be serious.