EBARA 4WY Serie Manual De Instalación página 4

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OVERVIEW
This manual gives information about the correct use and installation of the 4" motor WY
series.
Any improper use of the motor may cause damage to the motor and to the plant and
invalidates product warranty.
Instructions and prescriptions refer to the standard installation: for any special arrangement
please contact EPE Technical Department.
WY MOTOR DESCRIPTION
• Stator impregnated with a special epoxy resin and hermetically sealed, in order to guarantee
the best electrical insulation and the most efficient cooling.
• Rotor and bearings lubricated with a solution of water and polypropylenic glycol.
• Removable cable connector.
• AISI 304 outer sleeve.
• AISI 303 splined shaft end.
• Cast iron G20 upper bracket.
• AISI 304 upper bracket cover.
• Motor sealing provided by labyrinth sand slinger and mim ring.
• Pressure balancing diaphragm.
• Valve for cooling liquid refilling.
PRELIMINARY INSPECTION
[√] Visually check the motor integrity, in order to find possibile damages due to transportation.
[√] Check power and voltage according to the application.
[√] Manually check that the shaft can rotate
[√] If the motor remains in stock for more than one year, check the water level: if water
refilling is needed, please contact the Ebara Technical Department.
[√] Check the insulation resistance with a megger before installation: referring to a brand
new motor, the resistance must be over 400 Mohm.
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APPLICATION
The WY motor can be coupled with 4" submersible pump having the flange and joint
dimensions according to NEMA standards.
The motor is designed to be submerged and it is suitable for the following applications:
• water supply from deep wells;
• domestic and agricultural irrigation;
• booster pressurizing.
Pumping explosive liquids or using the motor in hazardous
environments is strictly forbidden!
APPLICATION LIMITS
• Maximum water temperature: 35 °C
• Water pH: 5.8-8.6
• Maximum startings per hour: 30
• Minimum cooling flow rate: 0.08 m/s
• Maximum immersion depth: 150 m
• Voltage tolerance: +6%/-10 %
• Vertical or horizontal use is allowed
• If the motor is combined with a frequency converter, please contact EPE Technical
Department
• Remind that in case of using the motor in aggressive environments, any anomaly or
malfunction are under the responsability of the installator
• If the motor is powered by an electric generating set, we recommend to:
− start the generating set before the motor
− stop the motor before the generating set.
INSTALLATION
• The WY motor has been designed to work only submerged.
• A cable is provided: do not damage the motor while moving it and do not lift the motor
by the cable.
• After mounting the pump, check that the shaft is able to rotate and put some grease on
the joint.
• Choose the lead cable according to the table on the next page.
• Concerning the connection, please follow the instructions supplied with the cable
junction kit.
• Fix the cable to the delivery pipe in order to avoid damages.
Make sure that the motor does not touch the bottom of the well!
Sand may damage the diaphragm, so keep the motor at least
1 m over the bottom of the well!
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