salmson SIL Serie Instalacion Y Puesta En Servicio página 57

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• In the case of high water temperatures and system pressures, allow
the pump to cool down before all work.
• Always wear protective clothing, protective gloves and protective
goggles when working.
Depending on the different operating conditions and the degree
of installation's automation, the pump can be switched on and off
in different ways. Observe the following:
Stop procedure:
• Prevent return flow to the pump.
• Do not work too long with an insufficient volume flow.
Start procedure:
• Be sure that the pump is completely filled up.
• Do not work too long with an insufficient volume flow.
• Larger pumps require a minimum flow rate amount to operate
properly.
• Operating against a closed shut-off device can lead to overheating
in the centrifugal chamber and to damage of the shaft seal.
• Ensure a continual flow to the pump with a sufficiently large NPSH.
• Prevent insufficient counter pressure leading to a motor overload.
NOTE:
To prevent significant increases in motor temperature and excessive
load on the pump, coupling, motor, gaskets and bearings, no more
than 10 switch-on procedures should be performed per hour.
Double pump operation:
NOTE:
To ensure the operational standby of the standby pump, the standby
pump must be operated every 24 h at least once a week.
Salmson 11/2017