- 15 -
Operation
1. Before operation
Read through this section before use.
CAUTION
● Do not keep a discharge or a suction line little open
or closed in operation.
● Do not open/narrow a discharge or a suction line
sharply, otherwise the magnetic coupling*
1
may be
disconnected*
2
(In this case turn off power.).
● If foreign matters enter the pump, turn off power
and remove them, otherwise failure or malfunction
may result.
● Do not run pump dry. If the pump runs without a liq
-
uid, the pump is damaged by friction heat.
Word & Terms:
*1 A pair of drive and driven magnets
*2 A state that a driven magnet (combination of impeller and magnet capsule units) does not
rotate in sync with the drive magnet.
■ Preparations for operation
1. Check that the pump is under a flooded suction system and a liquid
in a supply tank is at an appropriate level.
2. Check the connection between the pump and piping.
3. Check the pump is securely anchored.
2. Operation
•
Do not run the pump in closed-discharge operation. Always keep
the rated minimum flow rate (a tenth of the max flow rate).
•
The pump should never be operated for a lengthy period (1 minute
or more) with a discharge valve closed. Operation below the mini-
mum flow can reduce lubricant and cooling effects on sliding parts.
This could lead to failure.
•
Do not send any medium other than fluid.
•
Be sure to secure connections on a suction line for the prevention
of entrained air. The presence of air in a suction line may prevent
liquid delivery.
•
Do not turn ON and OFF power in a short time. Before resuming
operation, wait 30 minutes to turn on power after a motor has com-
pletely stopped rotating. Otherwise, motor may fail.
