Operating instructions

Section 2
Installation & Operation
Installation & Operation 2-1MN400
Overview Installation should conform to the National Electrical Code as well as local codes and practices. When
other devices are coupled to the motor shaft, be sure to install protective devices to prevent future
accidents. Some protective devices include, coupling, belt guard, chain guard, shaft covers etc. These
protect against accidental contact with moving parts. Machinery that is accessible to personnel should
provide further protection in the form of guard rails, screening, warning signs etc.
Location
It is important that motors be installed in locations that are compatible with motor enclosure and ambient
conditions. Improper selection of the motor enclosure and ambient conditions can lead to reduced
operating life of the motor.
Proper ventilation for the motor must be provided. Obstructed airflow can lead to reduction of motor life.
1. Open Drip−Proof/WPI motors are intended for use indoors where atmosphere is relatively clean, dry,
well ventilated and non−corrosive.
2. Totally Enclosed and WPII motors may be installed where dirt, moisture or dust are present and in
outdoor locations.
Severe Duty, IEEE 841 and Washdown Duty enclosed motors are designed for installations with high
corrosion or excessive moisture conditions. These motors should not be placed into an environment
where there is the presence of flammable or combustible vapors, dust or any combustible material, unless
specifically designed for this type of service.
Hazardous Locations are those where there is a risk of ignition or explosion due to the presence of
combustible gases, vapors, dust, fibers, or flyings. Facilities requiring special equipment for hazardous
locations are typically classified in accordance with local requirements. In the US market, guidance is
provided by the National Electric Code.
Caution: Do not lift the motor and its driven load by the motor lifting hardware. The motor lifting hardware
is adequate for lifting only the motor. Disconnect the load (gears, pumps, compressors, or other
driven equipment) from the motor shaft before lifting the motor.
Mounting
The motor must be securely installed to a rigid foundation or mounting surface to minimize vibration and
maintain alignment between the motor and shaft load. Failure to provide a proper mounting surface may
cause vibration, misalignment and bearing damage.
Foundation caps and sole plates are designed to act as spacers for the equipment they support. If these
devices are used, be sure that they are evenly supported by the foundation or mounting surface.
After installation is complete and accurate alignment of the motor and load is accomplished, the base
should be grouted to the foundation to maintain this alignment.
The standard motor base is designed for horizontal or vertical mounting. Adjustable or sliding rails are
designed for horizontal mounting only. Consult your Baldor distributor or authorized Baldor Service Center
for further information.
Alignment
Accurate alignment of the motor with the driven equipment is extremely important. The pulley, sprocket,
or gear used in the drive should be located on the shaft as close to the shaft shoulder as possible.
It is recommended to heat the pulley, sprocket, or gear before installing on the motor shaft.
Forcibly driving a unit on the motor shaft will damage the bearings.
1. Direct Coupling
For direct drive, use flexible couplings if possible. Consult the drive or equipment manufacturer for
more information. Mechanical vibration and roughness during operation may indicate poor alignment.
Use dial indicators to check alignment. The space between coupling hubs should be maintained as
recommended by the coupling manufacturer.
2. End-Play Adjustment
The axial position of the motor frame with respect to its load is also extremely important. The motor
bearings are not designed for excessive external axial thrust loads. Improper adjustment will cause
failure.
3. Pulley Ratio
The pulley ratio should not exceed 8:1.
Caution: Do not over tension belts. Excess tension may damage the motor or driven equipment.
4. Belt Drive
Align sheaves carefully to minimize belt wear and axial bearing loads (see End-Play Adjustment). Belt
tension should be sufficient to prevent belt slippage at rated speed and load. However, belt slippage
may occur during starting.
5. Sleeve bearing motors are only suitable for coupled loads.