Installation - WEG W22 Premium E3 Manual De Instalación, Operación Y Mantenimiento

6. INSTALLATION

The installation of electric motors in hazardous areas must be always performed by qualified personnel
with knowledge on relevant standards and safety rules.
Check some aspects before proceeding with the installation:
1. Insulation resistance: must be within the acceptable limits. See item 5.4.
2. Bearings:
a. Rolling bearings: oxidized bearings must be replaced. If no oxidation is detected, lubricate the bearings as
described in Item 8.2. If the motor is stored for a period of over two years, the bearings must be replaced
before starting the motor.
b. Sleeve bearing: if sleeve bearing motors are stored longer than the recommended oil change interval, the
oil must be changed before machine starting. Don't forget to remove the dehumidifiers when you drain the
oil from the motor and to fill it again with new oil before starting the machine. For more details, see item
8.2.
3. Operating conditions of the start capacitors: If single-phase motors are stored for a period of over two years,
it is recommended to change the start capacitors before motor starting since they lose their operating
characteristics.
4. Terminal box:
a. the inside of the terminal box must be clean and dry.
b. the contacts must be correctly connected and corrosion free. See 6.9 and 6.10.
c. the cable entries must be correctly sealed and the terminal box cover properly mounted in order to ensure
the degree of protection indicated on the motor nameplate.
5. Cooling: the cooling fins, air inlet and outlet openings must be clean and unobstructed. The distance
between the air inlet openings and the wall should not be shorter than ¼ (one quarter) of the diameter of the
air inlet. Ensure sufficient space to perform the cleaning services. See item 7.
6. Coupling: remove the shaft locking device (where fitted) and the corrosion protection grease from the shaft
end and flange just before installing the motor. See item 6.4.
7. Drain hole: the motor must always be positioned so the drain hole is at the lowest position (If there is any
indication arrow on the drain, the drain must be so installed that the arrow points downwards).
Motors supplied with rubber drain plugs leave the factory in the closed position and must be opened
periodically to allow the exit of 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 (see Figure 6.1).
For motors with degree of protection IP56, IP65 or IP66, the drain plugs must remain at closed position (see
Figure 6.1), being opened only during the motor maintenance procedures.
The drain system of motors with Oil Mist lubrication system must be connected to a specific collection
system (see Figure 6.12).
Figure 6.1 – Detail of the rubber drain plug mounted in closed and open position.
Closed position Open position
Manual of Electric Motors
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