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1. Before installation
Always observe the following points.
■
Precautions for starting/stopping the pump
(In case the pump is in flooded suction system.)
Follow the procedures below when starting/stopping the pump for the prevention of water hammer.
Take extra care when a discharge line is long.
When starting the pump
First, prime the pump. Then turn on power to start operation with a discharge valve fully closed.
And then gradually open the valve and adjust a flow rate to a specified point.
When stopping the pump
Gradually close a discharge valve. Turn off power and stop the pump after the valve is fully closed.
NOTE: Do not close a discharge valve sharply. Otherwise an excessive pressure may damage the
pump, when using a solenoid valve, set it to close slowly.
■ Do not install or store the pump in the following places where...
• Ambient temperature exceeds 40 ºC or falls below 0 ºC.
• Ambient humidity exceeds 85%RH or falls below 35%RH.
• Under a corrosive/explosive atmosphere (Except explosion-proof type).
• The pump is exposed to rain or liquid (Except outdoor-use type).
• The pump is subject to vibration or dust.
CAUTION
●
Do not run pump dry
Do not run pump dry (operation without priming water or with a suction valve
closed). Otherwise, internal parts are excessively worn by friction heat and
fatal pump damage results.
* If the pump runs dry by mistake, turn off power and leave it for more than
one hour to cool it down. Quick cooling can give rise to cracks on parts.
* An Iwaki dry run protector, the DR, is recommended for the prevention of
dry running.
●
Do not bring the pump close to a flammable substance
Keep the pump away from a flammable substance for the prevention of fire.
●
Do not remodel the pump
A remodelled pump will not be warranted. Also, we are not responsible for
personal injury or property damage due to any modification.
Prohibit
Prohibit
Prohibit
Installation
