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4 Installation
4.1 Precautions
Before starting work, make sure that the safety instructions in the chapter
on page 3 have been read and understood.
DANGER: Electrical Hazard
Before starting work on the unit, make sure that the unit and the control panel
are isolated from the power supply and cannot be energized. This applies to the
control circuit as well.
DANGER: Inhalation Hazard
Before entering the work area, make sure that the atmosphere contains
sufficient oxygen and no toxic gases.
4.1.1 Hazardous atmospheres
DANGER: Explosion/Fire Hazard
Special rules apply to installations in explosive or flammable atmospheres. Do
not install the product or any auxiliary equipment in an explosive zone unless it
is rated explosion-proof or intrinsically-safe. If the product is rated explosion-
proof or intrinsically-safe, then see the specific explosion-proof information in
the safety chapter before taking any further actions.
Authority regulation
Vent the tank of a sewage station in accordance with local plumbing codes.
4.2 Requirements
Sedimentation prevention
In order to avoid sedimentation when the pumped liquid contains solid particles,
the velocity of the liquid in the discharge line must exceed a certain value.
Choose applicable minimum velocity from the table, and choose proper
dimension of the discharge line accordingly.
Mixture
Minimum velocity, meter per
second (feet per second)
Water + coarse gravel
4 (13)
Water + gravel
3.5 (11)
Water + sand, particle size <0.6 mm
(0.024 in)
2.5 (8.2)
Water + sand, particle size <0.1 mm
(0.004 in)
1.5 (4.9)
4 Installation
12
8120.280 Sandy Inox Installation, Operation, and Maintenance Manual
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