Installation; Install The Pump; Sedimentation Prevention; Discharge Line Requirements - Xylem Flygt 2250 Installation, Operation And Maintenance Manual

Installation

Installation

Install the pump

WARNING:
• Electrical shock hazard. Check that the cable and cable entry have not been damaged
during transport before installing the pump.
• Make sure that the unit cannot roll or fall over and injure people or damage property.
• Do not install CSA-approved products in locations that are classified as hazardous in the
national electric code, ANSI/NFPA 70-2005.
• Do not install the starter equipment in an explosive zone unless it is explosion-proof
rated.
NOTICE:
• Never force piping to make a connection with a pump.
These requirements apply:
• Use the pump dimensional drawing in order to ensure proper installation.
• Provide a suitable barrier around the work area, for example, a guard rail.
• Check the explosion risk before you weld or use electric hand tools.
• Remove all debris from the inlet piping system before you install the pump.
• Always check the impeller rotation before lowering the pump into the pumped liquid.

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
Water + coarse gravel
Water + gravel
Water + sand, particle size <0.6 mm (0.024 in)
Water + sand, particle size <0.1 mm (0.004 in)
For more permanent installations with a heavily contaminated pumped liquid, a settling
pump-sump is recommended.
Figure 2: Settling pump-sump

Discharge line requirements

The discharge line can be run vertically or horizontally, but must be without sharp bends.
12
Minimum velocity, meter per second (feet per second)
4 (13)
3.5 (11)
2.5 (8.2)
1.5 (4.9)
Flygt 2250 Installation, Operation, and Maintenance Manual