13
Warning
•
Turn off the power and stop the pump & other equipments when repairing or disassembling pump,
otherwise it may cause electric shock.
•
Be careful of big accidents caused by inserting fingers or cloth in rotator.
Caution
•
Wear suitable protective clothing during assembly and disassembly work
•
Work after releasing pressure from discharge piping and remove liquid from Liquid End Part
prior to repair or maintenance of pump.
It is concern that pump is damaged by freezing during winter season. Without regard to stop perioed of
operation, drain the liquids in the piping and pump by operating dry run after opening the drain valve
on the suction piping.
In case of stop pump operation for a long period(more than 1 week), the pump should be run at
atmospheric pressure of discharge side for several minutes before going into normal operation.
… Do not start regular operation before above warming up.(Set the controller to 50%)
It is concern that pump is damaged by freezing during winter season. Without regard to stop perioed of
operation, drain the liquids in the piping and pump by operating dry run after opening the drain valve
on the suction piping.
10-5 Confirmation of discharge amount
If pump has no problem, check the discharge volume under actual running condition with measuring
device such as mass cylinder.
If discharge volume had no fluctuation after repeated measurements, the pump is judged to be running
normally.
When the discharge amount increases/decreases by changing the motor speed, measure the
discharge amount one minute or more after the change.
Note) If you request the test report, we submit the test report which has been performed at normal
temperature and with clean water. The result may vary depending on on-site pipes and
transferred liquid.
10-6 Pulse rate increase
The pulse of the metering pump largely depends on pipes and transferred liquid. (Since the factory test
condition is not same as your on-site condition, the result may be different.)
Besides, if the pump operates after a long stop, its metering performance and pulse rate may change due
to adherence of transferred liquid to the check valve etc., so, always clean the inside of the wet side to
keep it for a long stop duration. The increase of the pulse rate after the warranty may result from life time
of parts, so please refer to “14. Consumable Parts”. For other questions, please contact
us.
11
Maintenance & Inspection
11-1 Inspection before operation
Check the level of liquid tank and, if it is insufficient, supplement the liquid.
Check if the suction & discharge valve are opened.
Check if piping is safe and undamaged.
Check electrical wiring if there are no electrical short & disconnection.