Xylem Flygt 2125, Инструкция по установке, эксплуатации и обслуживанию

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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 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)
For more permanent installations with a heavily contaminated pumped liquid, a settling
pump-sump is recommended.
WS001380B
Figure 4: Settling pump-sump
Discharge line requirements
The discharge line can be run vertically or horizontally, but must be without sharp bends.
Installation
Flygt 2125 Installation, Operation, and Maintenance Manual 15