Instructions / Assembly

Instruction Leaflet
2800
Page 1
2515675-001
Rev. D
September 2012 1/20 through 5 HP Ratings General Purpose and
New Information NEMA 42, 48, 56 and 140 Frame Sizes Specialty Motors
Your Century Motor
A Century motor is a quality product. Proper
installation and maintenance will assure long
life, safe operation and
dependable service.
Warning: Failure to follow Instructions
and Safe Electrical Procedures Could
Result in Serious Injury.
Inspect Before Installation
1. Examine motor thoroughly to be sure it was
not damaged in shipment.
2. Check the motor shaft which should rotate
freely when turned by hand.
3. Check nameplate rating. Voltage and
frequency must match the power source.
Motor hp, speed and rotation must be
suitable for the intended use.
4. If wet, damp or removed from a damp
location, allow motor to dry before
installing.
Safety Precautions to Avoid
Personal Injury
1. Disconnect power source before working on
or near a motor or its connected load.
2. Remove shaft key before energizing or
bench testing a motor with keyway and key.
3. Install all wiring, fusing and grounding in
accordance with National Electrical Code
and local requirements.
4. Wire size from service box to power supply
outlet for motor should never be smaller than
#14 AWG.
5. Keep all parts of body and loose clothing
clear of belts, pulleys and other exposed
moving parts at all times.
6. Cover or guard all moving parts that could
be hazardous.
7. Be careful when touching a motor that could
be at or above its normal operating
temperature. The external motor surface
could be hot enough to be painful or to cause
injury.
8. Do not insert any object into motor at any
time.
9. Do not operate motor near flammable or
explosive material unless UL listed for
hazardous locations.
10. Do not use a motor with an automatic-reset
thermal protector where automatic restarting
of the motor could be hazardous.
Thermal Protection
Use a “Thermally Protected” motor wherever
required by safety regulations or an
Underwriters’ Laboratories Standard, or where
severe overloading, jamming or other abnormal
operating conditions may occur.
1. Use a motor with a manual reset protector
for applications such as compressors
conveyers, farm equipment, power tools, etc.
where automatic restarting could be
hazardous.
2. A motor with a manual reset protector will
have a red button which will pop out when
the protector operates. After about a five-
minute cool-down period, the protector can
be reset by depressing the red button.
3. Frequent operation of the thermal protector
is an indication of an abnormal condition
that should be corrected to avoid premature
motor failure.
Location
1. Open motors are intended for use where the
environment is relatively clean, dry and
noncorrosive.
2. Totally Enclosed motors are intended for use
in dirty, damp or oily locations.
3. Explosion-Proof motors are required for use
in hazardous locations and specifically
where the atmosphere or motor environment
may be explosive.
4. Ambient temperature around the motor
should not exceed nameplate rating.
5. If installation is outdoors, protect motor with
a cover but install cover so that it does not
restrict airflow around motor.
6. Do not operate motor in a confined non-
ventilated area.
Installation
1. Recheck motor nameplate to be sure that
motor type and motor hp, voltage and speed
rating are suitable for the intended use.
2. The words “Air Over” on the nameplate
indicate that the motor is suitable for use
only on a direct-drive fan or blower where
the motor is mounted in the air stream. Other
usage of such a motor could cause
overheating and premature failure.
3. Check direction of rotation before
connecting the motor to the load by
clamping motor securely and them
momentarily applying power to the motor
terminals and observing shaft movement.
4. Fasten motor securely to a rigid base,
mounting pad or other means for mounting
the motor using the largest bolts that will fit
through the mounting holes.
5. Use only the capacitor rating specified for
the motor when one is required.
6. Direct-Drive Applications:
a. Locate fan, blower or other direct-
connected load for proper running
clearance and then fasten securely
b. Align shafts accurately when a coupling
is used and then fasten coupling securely
to both the motor shaft and the driven
shaft.
c. Clean all mating surfaces if motor to be
face mounted. The assembly should turn
freely when parts are properly seated and
aligned.
7. Belt-Drive Applications:
a. Use pulley size that will produce the
desired machine speed without
overloading the motor.
b. Mount motor pulley as close as possible
to bearing housing to minimize bearing
loading, but allow sufficient clearance for
rotor end play.
c. Align pulleys carefully, then fasten
securely.
d. Mount a sleeve-bearing motor so that the
direction of belt pull is opposite the oil
well holes- (or bearing window) to avoid
premature bearing failure.
e. Tighten belt only enough to prevent
slippage. A properly adjusted belt will
deflect about ½ inch when light finger
pressure is applied midway between the
pulleys.
Electrical Connections
1. Disconnect power source and tag or lock
open before starting.
2. Refer to connection diagram on nameplate or
on inside of terminal cover to determine
proper connections for the voltage source
and to obtain the desired speed and direction
of rotation. (Rotation of a three-phase motor
can be reversed by interchanging any two
line leads.)
3. Use a separate branch circuit with adequate
capacity for each motor to keep voltage drop
to a minimum and to avoid reduced
performance and possible overheating of the
motor.
4. Grounding:
a. Connect motor frame to the electrical
service ground in accordance with local r
National Electrical Code requirements.
b. Use the green lead or the green screw in
the conduit box area, depending on which
is provided, for the grounding
connection.
c. Use a size 16AWG or larger wire for
grounding.
Regal Beloit America, Inc.
531 North Fourth Street
Tipp City, OH 45371
2515675
-
001
Uncontrolled Copy