Maintenance; Daily Inspection; Regular Inspection - EBARA DML Instruction Manual

7

Maintenance

Warning
Caution
If inspection of pressure, discharge rate, voltage, current, etc. finds any difference from those of normal
state, the phenomenon is a sign of accident. Therefore, it is important to give quick action to the matter
referring to 8 "Troubleshooting". To do this, keep daily operational record. Preparation of a standby
pump is recommended to respond to an accident.
Note

1. Daily inspection

1) Check current and ammeter fluctuation every day. If ammeter fluctuation is significant even it is
within the limit of pump rating, the pump may have caught foreign matter.
2) If the discharge rate showed a sudden decrease, foreign matter may have clogged the suction
opening.

2. Regular inspection

1) Once a month
Measure the insulation resistance. If the insulation resistance is 1MΩ or more, there occurs no
problem on operating the pump. If, however, a sudden drop appeared in the insulation resistance
even if the value is at or above 1MΩ, the phenomenon is abnormal, and repair of the pump is
required.
2) Once every six months
Replace oil in the mechanical seal chamber at every six months. If
water enters the oil to give significant cloudiness, replace the
mechanical seal. As illustrated in Fig. 7 oiling shall be done at a
specified quantity while the oiling plug faces upright and the pump is
positioned horizontally. After the oiling, fully tighten the plug with a
seal washer.
Disassembling, repairing, and modifying the pump shall be done only by a repair
technician.
There is a possibility of electric shock, ignition, or injury caused by abnormal
functioning, break, etc.
Do not attach parts other than EBARA's standard parts, and do not modify
EBARA's standard products. Use of other than the standard parts may result in
electric shock, ignition, or injury caused by abnormal functioning or break, or may
fail to perform normal functioning.
Before entering inspection and repair, cut OFF a power source at a main
disconnect device which is equipped with an operating handle which is lockable in
OFF position. There is a possibility of electric shock and of injury caused by
sudden start of the pump in automatic operation mode.
To stop operation for a certain period, cut OFF the power switch.
Deterioration of insulation may cause electric shock, electric leak, and fire.
If the insulation resistance decreases to 1MΩ or less, cut immediately OFF the
power switch, and request the inspection and repair of the pump to the supplier or
EBARA There is a possibility of motor burn-out, electric shock, and fire.
If there occurred abnormality such as failing in starting, immediately cut OFF the
power switch to prevent accident, and request the inspection and repair to the
supplier or EBARA Mal-operation or wrong work may induce accident.
Consumable parts shall be regularly replaced. If the deteriorated or worn parts
are used, they may lead to serious failures of water leak, seizing, and break of
pump parts. For regular inspection, parts replacement, and related works, request
the matter to the supplier or EBARA
The table of standard pump performance is available from EBARA
EBARA
- 12 -
Fully tighten the
plug after oiling at a
specified quantity.
Fig. 7
Corporation