Armstrong HE Series User manual

Installation
and operating
instructions
AC Induction motors
File No: 48.80
Date: july 30, 2013
Supersedes: new
Date: new

contents
Receiving inspection and handling 4
Installation/mounting 4
Location 5
Electrical connections 5
Start up 5
Lubrication of ball or roller bearings 5
Frequency or relubrication 6
Type of grease 6
Procedure for relubrication 6
Inverter duty application 6
Storage 6

installation &
operating instructions ac induction motors
4
This instruction manual has been prepared for personnel
authorized to install, operate and maintain Armstrong three
phase ac induction motors safely and correctly.
receiving inspection and handling
1Immediately check the motor for external damage that may
have occurred during shipment and if any is found, inform
the nearest Armstrong representative immediately.
2Check the nameplate data, specially the voltage and
winding connection.
3Turn the shaft and ensure it turns freely.
warning
The motor should be lifted by the lifting eyebolts or
lugs. Those are provided for lifting the motor only
and must not be used for lifting other equipment that
may be attached to the motor. All eyebolts must be
fully tightened. When lifting the motor be careful not
to damage other parts such as shaft extension, fan
cover, fan, windings, etc.
the following safety precautions
must be observed.
1Rotating parts of motor and high voltage connections can
cause serious (even fatal) injury if improperly installed,
operated or maintained. Responsible personnel should be
familiar with nema mg2 (safety standards for construction
and guide selection, installation and use of electric motors
and generators), the National Electrical Code (nec) and all
local safety regulations.
2When servicing, all power sources to the motor and
accessory devices should be de-energized, disconnected
and lock-o and all rotating parts should be inactive.
3Lifting devices, when supplied, are intended for lifting the
motor only. When other components are fixed to the motor,
dual lifting devices must be used.
4Suitable protection must be used when working near
machinery with high noise levels.
5Safety means and protection must not be by-passed or
rendered inoperative.
6The electric motor frame must be grounded in
accordance with National Electrical Code and the local
applicable regulations.
7A suitable enclosure should be provided to prevent access to
the motor by unauthorized personnel.
8Extra caution should be observed around motors that are
automatically controlled or have automatic reset relays; the
motor could restart unexpectedly and cause serious injuries.
9When belts are used to drive the equipment, belt guard
should be used to prevent injuries that could be caused by
belts breaking.
10 Shaft must be free to turn before motor is started.
installation/mounting
The motor foundation must be suciently rigid as to minimize
vibration and maintain alignment between the motor and the
driven equipment. Motors are dynamically balanced at the
factory to nema standards for vibration. However, vibration at
the motor and the driven equipment can occur if the base they
are mounted on is not rigid enough. To minimize vibration,
a strong and rigid base must be provided for the motor and
driven equipment.
Only trained personnel should perform installation of
the motor.
Direct Drive application
Direct connected motors may be coupled to the load through
flexible or rigid coupling. Coupling halves should not be
installed by hammering, unless the shaft can be backed up
to prevent damages to the bearings. Accurate mechanical
alignment is essential for successful operation. Align shafts
accurately. If reverse rotation can cause damage to the driven
equipment, check rotation before connecting the motor to the
load (see start up).
V-belt Drive application
1Mount motor sheave close to the bearing housing.
2Allow sucient clearance for rotor endplay.
3The sheave diameter should not be less than nema
recommended values (see nema mg-1-14.42).
4Align sheaves carefully. Tighten belt only enough to
prevent slippage.
Condensation Drain Holes
On Armstrong cast iron tefc motors, condensation drain holes
are located at each end of the stator housing where the feet are
located, and on the face of output flanged motors (tc, jm, jp).
The drain hole plugs inserted at the factory must be removed
to prevent condensation water build up. On horizontal foot

installation &
operating instructions
ac induction motors
5
mounted f1 or f2 installations, remove plugs located at each
end of stator. In vertical output shaft down flange mounted
installations, remove plugs located on face of output flange.
Foot mounted motor
Motor should be installed on a rigid foundation to prevent
excessive vibration and should be fastened securely to a base
with maximum size bolts.
Flanged motor
All registers are accurately machined to match with the driven
equipment. Matching surfaces should be free from dirt or burrs
and solidly engaged. The complete assembly should turn freely
without stressing shaft and bearings from misalignment
and thrust.
location
1Drip-proof motors are intended for use where atmosphere is
relatively clean, dry and non-corrosive. Keep windings clean
with a soft brush, cloth or vacuum.
2Totally-enclosed motors may be installed where dirt,
moisture and corrosion are present.
note
in all cases, no surrounding structure should obstruct normal
flow of ventilating air through or over motor.
warning
Do not install general purpose motors where hazard-
ous, inflammable or combustible vapors or dust are
present, due to the possibility of explosions or fire
and damage to property or injury to personnel.
electrical connections
1Connect motor to correct power supply according
to nameplate.
2Motor and control wiring, overload protection and ground-
ing should be done in accordance with the National Electric
Code and local regulations.
3Identify motor auxiliary device such as space heater or
temperature sensors. These should have their own isolated
circuits insulated separate from the motor power cables.
start up
warning
The insulation resistance of the motor winding should
be checked before energizing the motor.
1It is recommended that the motor be initially started uncou-
pled from load. Check direction of rotation. If rotation must
be changed, allow the motor to come to a complete stop,
and interchange any two leads on a three phase motor. Fan
on fan-cooled motors that have directional rotation name-
plates must be reversed on the mounting shaft if the rotation
is changed.
2Connect load - The motor should start quickly and run
smoothly, if not, shut o the power at once. Recheck the
assembly including all connections before restarting.
3If excessive vibration is noted, check for loose mounting
bolts, a motor support structure that is too flexible or trans-
mitted vibration from adjacent machinery. Periodic vibration
checks should be made as foundation settles.
4Operate under load condition for a short period of time.
Check operating current against nameplate.
lubrication of ball or roller bearings
Grease lubricated bearings as supplied, are adequate for a long
period of operation without re-lubrication. A good maintenance
schedule for re-greasing will vary depending on motor size,
speed, duty and environment.

installation &
operating instructions ac induction motors
6
frequency or relubrication
The following table suggests re-lubrication intervals for motor
on normal steady running, light duty indoor load in relatively
clean atmosphere at 40°c (104°f) ambient temperature or less.
enclosure insulation frames 143-215 frames 254+
tefc fnot greasable 6months
Frame sizes 143 through 215, inclusive have permanently
lubricated sealed bearings.
note
Frequency shown above should be reduced by:
½- For motors above 1800 rpm
½ - For heavy-duty, dusty locations.
L - For severe-duty, high vibration and shock
type of grease
Use Polyrex em Polyurea grease or equivalent unless special
grease is specified on the nameplate.
procedure for relubrication
When re-greasing, stop the motor, remove outlet plug and add
amount of grease per reference table below, with hand level
gun only. Discontinue at once if grease appears at outlet plug.
This may occur before specified amount is used.
Run for about ten minutes before replacing outlet plug.
Volume reference table
shaft diameter
(at face of bearing)
grease amount
(ounce)
0.8in to 1.2in 1.5g to 2.8g (0.05 to 0.1)
1.4in to 1.8in 3.1g to 5.7g (0.11 to 0.2)
2.0in to 2.2in 12.3g to 17g (0.43 to 0.6)
2.4in to 3.3in 32.8g to 45g (1.16 to 1.6)
caution
Over-greasing is a major cause of bearing and motor
failure. Make sure that dirt and contaminants are not
introduced when adding grease.
inverter duty application
Please refer your application to Armstrong or its nearest
distributor for instruction.
storage
If the motor is not packaged for long-term storage and is not
to be put into service immediately, certain precautions should
be taken to protect it. If at all possible, place the motor under
cover in a clean and dry location.
During storage, the winding should be protected from exces-
sive moisture absorption by some safe and reliable method
of heating. Space heaters, if supplied, may be used for this
purpose. The temperature of the winding should be always
maintained a few degrees above the temperature of the
surrounding air.
birmingham
buffalo
toronto
manchester
bangalore
shanghai armstrongfluidtechnology.com
[phone]
[phone]
[phone]
[phone]
[phone]
[phone]
armstrong fluid technology
established 1934