IWAKI PUMPS MXM Series, Instruction Manual

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CAUTION
● Never run pump dry or shut off a suction valve during operation. Otherwise,
the pump fails in a short period. Especially for the FF types, the bearing and
spindle can be damaged in a quite-short time of about one minute.
● Check the rotational direction of the pump. Clockwise seen from the motor
end is a correct direction. Operation in the reverse direction may cause
pump damage.
● Stop the pump within one minute if cavitation occurs. Do not continue opera-
tion with entrained air. Especially for the FF types, the bearing and spindle
can be damaged in a quite-short time of about one minute.
● Stop the pump immediately when the magnet coupling is disconnected. The magnetic
force reduces if the pump keeps on running for one minute or longer in this condition.
● Keep liquid temperature change within 80 ˚ C through operation and stopping.
Retighten the drain cap when the surrounding or liquid temperature signifi-
cantly changes. The maximum number of ON-OFF operation should be with-
in six times an hour. Frequent ON-OFF operation can reduce the pump life.
● Start the pump with a closed discharge valve 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 it damages the pump.
● If power is interrupted when the pump is running, switch off and close a dis-
charge valve.
● Take extra care so that the discharge pressure does not exceed the pump
limit. See page 7 for the maximum operating pressure.
● Risk of burning. Pump and pipe surface temperature rise high along with
liquid temperature. Do not touch the pump or pipe surface directly in or right
after operation.
Model Liquid temperatuer Possible highest surface temperature (at ambent 40°C)
MXM220/221
90°C 65°C
100°C 75°C
MXM441/442
90°C 65°C
100°C 75°C
MXM542/543/545
90°C 70°C
100°C 80°C
● The noise level is shown below. In case the pump noise affects human
health or communication to secure a safety, provide a noise reduction cover.
Model Noise level
MXM220/221
80dB MXM441/442
MXM542/543/545
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Operation
Prohibit
Caution
Caution
1. Before operation