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CAUTION
1. Operational precautions
Operation
Prohibit
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Caution
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Caution
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● Never run pump dry or shut off a suction valve during operation. Otherwise
the pump fails in a short period.
● Check the rotational direction of the pump. Clockwise seen from the motor
end is a correct direction. Operation in a reverse direction may cause
pump damage.
● Stop the pump immediately when it is running under cavitation. Do not
continue to run the pump when air is sucked from a suction line.
● Stop the pump immediately when the magnet coupling is disconnected.
Magnetic force reduces if the pump keeps on running for more than one
minute in this condition.
● Keep liquid temperature change within 80˚C at any time during operation or stop.
● Start the pump with a discharge valve fully closed in order to avoid water
hammer.
● Closed-discharge operation should be within one minute. If the pump runs
with a discharge valve closed for a long time, the liquid temperature inside
the pump rises and damages the pump.
● If power is interrupted while the pump is running, switch off the pump
immediately and close a discharge valve.
● Take extra care for a discharge pressure not to exceed the pump limit. See
page 15,
"Maximum operating pressure"
.
● The surface temperature of the pump or pipe rises high along with liquid
temperature in or right after operation. Take preventive measures.
Model
Liquid temperatuer Surface temperature (at ambent 40°C)
MX-F250/-F251/-F400/-F401/-F402/-F403
80°C
80°C
● Noise level
Model
MX-F250/-F400
MX-F251/-F401
MX-F402/-F403
Noise level
70dB
75dB
80dB
In case the pump noise affects human health or communication to secure
a safety, provide a noise reduction cover. Be careful not to reduce cooling
effect by a motor fan.
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