WEG W21 Manual De Instalación página 3

1. INTRODUCTION
The installation, operation and maintenance of the motor must be always performed by personnel qualified for hazardous area motors using
proper tools and methods and following the instructions contained in the documents supplied with the motor.
The instructions presented in this document are valid for WEG motors with the following characteristics:
Three-phase and single-phase induction motors (squirrel cage rotor)
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Three-phase hybrid motors (squirrel cage rotor + permanent magnets)
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These motors can be used in hazardous areas with the following types of protection:
Increased Safety – "Ex eb" or "Ex ec"
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Flameproof enclosure - "Ex db" or "Ex db eb"
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Protection by Enclosure (combustible dust) - "Ex tb" or "Ex tc"
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Details of motor marking may be found on nameplate and product certification, which is part of the motor documentation. For reference, this manual lists the
certificate numbers for each type of protection and their nameplate markings. Furthermore, the applicable Standards may be found in the product certification
and at the "Installation, Operation and Maintenance Manual of Electric Motors for Use in Explosive Atmospheres" - code 50034162. This manual is available in the
website www.weg.net.
The objective of this manual is to provide important information, which must be considered during the shipment, storage, installation, operation and maintenance
of WEG motors. Therefore, we advise to make a careful and detailed study of the instructions contained herein before performing any procedures on the motor.
The noncompliance with the instructions informed in this manual and others mentioned in the website www.weg.net voids the product warranty and may
compromise the type of protection of the motor and still result in serious personal injuries and material damages.
Any component added to the motor by the user, for example, cable glands, thread plug, encoder, etc., must meet the type of protection of
the enclosure, the "equipment protection levels" (EPL) and the degree of protection of the motor, according to the Standards indicated in the
product certification.
Special Conditions for Safe Use
The sign "X" added to the certificate number, informed on the nameplate of the motor, indicates that the equipment demands special
conditions for installation, operation and/or maintenance, being those described in the certificate and the motor documentation.
For reference, the chapter Certificates lists the certificate numbers for each type of protection and their nameplate markings.
The noncompliance with these requirements compromises the safety of the product and of the installation.
The correct classification of the installation area and ambient characteristics is user's responsibility.
Electric motors have energized circuits and exposed rotating parts which may cause injuries to people.
2. SHIPMENT, STORAGE AND HANDLING
Check the motor conditions immediately after receiving. When any damage is noticed, this must be reported in writing to the transportation company, and
immediately communicated to the insurance company and to WEG. In this case, no installation job can be started before the detected problem has been solved.
Check if the nameplate data matches the invoice data, the environmental conditions in which the motor will be installed, the type of protection and EPL of the motor.
If the motor is not immediately installed, it must be stored in a clean and dry room protected against dust, vibrations, gases and corrosive agents, and with relative
humidity not exceeding 60%.
In order to prevent water condensation within the motor during the storage period, it is recommended to keep the space heater ON (when supplied). In order to
prevent oxidation of the bearings and ensure an even distribution of the lubricant, rotate the motor shaft at least once a month (at least five turns), always leaving it in
a different position. For bearings with oil mist lubrication systems, the motor must be stored horizontally, independently from the mounting configuration, with ISO VG
68 oil in the bearing, (the amount is indicated in the motor manual available on the website www.weg.net) and the shaft must be turned weekly. If motors with open
bearings are stored longer than six months, the bearings must be relubricated with the amount of grease indicated on the nameplate before the commissioning
of the motor. If the motors are stored for more than two years, it is recommended to change the bearings, or to remove, wash, inspect and relubricate them
before the motor is started. After this storage period, it is also recommended to change the start capacitors of single-phase motors since they loss their operating
characteristics.
Handle the motor always carefully in order to prevent impacts and damages to the bearings and always install the shaft transportation/
locking device (if supplied) when transporting the motor.
Use only the eyebolts to lift the motor. However these eyebolts are designed for the motor weight only. Thus never use these eyebolts to lift
the motor with additional loads coupled to it. The lifting eyebolts of the terminal box, fan cover, etc., are intended to handle only these parts when
disassembled from the motor. Additional information regarding the maximum allowable angle-of-inclination is indicated in the general manual
available on the website www.weg.net.
Periodically and mainly before the initial star-up, measure the insulation resistance of the motor winding. Check the recommended values and the measuring
procedures in the website.
3. INSTALLATION
During the installation, the motors must be protected against accidental energization.
Check the motor direction of rotation, turning it without load before it is coupled to the load.
Remove the transportation devices and shaft locking device (if supplied) before starting the motor installation.
Motors must be only installed in places compatible with their mounting features and in applications and environments for which they are intended. It must be respected the
type of protection and the EPL of the motor, according to the classification of the area where the motor will be installed.
The motors with feet must be installed on bases duly planned in order to prevent vibrations and assure perfect alignment. The motor shaft must be properly aligned with the
shaft of the driven machine. Incorrect alignment, as well as improper belt tension, will certainly damage the bearings, resulting in excessive vibrations and even causing the
shaft to fail. The admissible shaft radial and axial loads indicated in the general manual of the website must be respected. Use flexible coupling whenever possible.
When motors are fitted with oil lubricated bearings or oil mist lubrication systems, connect the cooling and lubrication tubes (where provided).
For oil lubricated bearings, the oil level must be in the center of the sight glass.
Only remove the corrosion protection grease from the shaft end and flange immediately before the motor installation.
Unless specified otherwise in the purchase order, WEG motors are dynamically balanced with "half key" and without load (uncoupled). The driving elements, such as pulleys,
couplings, etc., must be balanced with "half key" before they are mounted on the shaft of the motors.
The motor must always be positioned so the drain hole is at the lowest position.
"Open/closed" rubber drain plugs are delivered in closed position and must be opened periodically to allow the drainage of the condensed
water. For environments with high water condensation levels and motor with degree of protection IP55, the drain plugs can be mounted in
open position.
ENGLISH
Three-phase permanent magnet motors
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Electric motors for explosive atmospheres | 3