Xylem L6C User Manual
Page 11
English
en
11
1.
Overview
This manual gives important information concerning the installation, use and maintenance of the motors. The contents of this manual refer to the
standard product, as presented in the sales documentation. Any special versions will be supplied with supplementary instruction sheets. Please
refer to the sales contract for the features of variants and special versions. Always specify the exact type of motor and code when requesting
our Sales and Service Department for technical information or spare parts. For any instructions, situations and events not covered in this
manual or in the sales documentation, please contact the nearest Technical Assistance Centre.
Read this manual carefully before installing and using the product.
Improper use may cause personal injury and/or damage to property, and invalidate the warranty.
2.
Product Description
The L6C range comprises a number of 6” submersible motors with cased stator and rotor immersed in a bath of demineralised water and anti-
freeze lubricating liquid, designed to be coupled to 6” and 8” submersible pumps with NEMA-compliant flange and coupling sizes. They can also
be coupled to 10" submersible pumps after checking the dimensions of the flange and of the pump coupling.
All the metal parts in contact with the water are either made from stainless steel or cast iron.
Each motor includes a cable with removable connector and a Kingsbury pivoted-shoe thrust bearing.
3.
Applications
Information for installers and users
All the motors in the L6C range can be used to drive submersible pumps in the conditions established in EN 60034-1 (IEC 60034-1) and at the
supply voltage / frequency specified on the rating plate.
The shaft extension and flange size of these motors comply with NEMA MG1:1987.
The power of the pumps coupled to these motors must be less than or equal to that of the motors.
3.1
Working Limits
3.1.1
Liquids in which the motor can operate
This motor can be used in cold water.
Do not use this motor with corrosive or explosive liquids, or particularly dirty or hard water (impurities may deposit on
the outer casing).
3.1.2
Water temperature
Minimum water temperature is + 0°C.
Maximum water temperature is + 35°C as long as the flowrate of the water around the motor does not fall below 0.3
m/s.
For temperatures above + 35°C, motor output must be reduced to ensure correct cooling.
For further information, please contact our Sales and Service Department.
3.1.3
Cooling the motor
To ensure the motor is correctly cooled, make sure the flowrate of the water around the outer casing is at least 0.3
m/s when positioning the motor in wells or tanks. At water speeds lower than 0.3 m/s, mount a cooling jacket.
For further information, please contact our Sales and Service Department.
3.1.4
Installation Position
All the motors in the range can be installed vertically.
All the motors in the range can be installed horizontally as long as the axial thrust of the pump never falls below 250 N while it is working.
For special requirements, please contact our Sales and Service Department.
3.1.5
Depth of immersion
The maximum depth of immersion for all motors is 250 m.
3.1.6
Power supply requirements
Make sure the supply voltage and frequency match those indicated on the rating plate of the motor.
For further information, please contact our Sales and Service Department.
The motors can generally work at the following supply voltage tolerances:
f
UN
f
UN
Hz
~
V
%
Hz
~
V
%
50
3
400
-10%, +5%
60
3
380
-10%, +5%
50
3
400/690
-10%, +5%
60
3
380/660
-10%, +5%
3.1.7
Number of starts per hour
The maximum number of starts per hour allowed is 20 for direct start with a maximum time of 3 seconds at full starting current.
3.1.8
Compatible pumps
Make sure the motor is compatible with the pump. Incompatible combinations may cause problems.
In particular, before coupling the motor to the pump check that:
−
the power of the pump to couple to the motor is less than or equal to that of the motor.
−
the supply voltage and frequency match those indicated on the rating plate of the motor
−
the motor and pump shafts turn freely
For further information, please contact our Sales and Service Department.
WARNING
WARNING
WARNING
WARNING
WARNING