LMC BC User manual
1
PUBLICATION NO: LMCW03A2
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INTRODUCTION SHIPPING AND RECEIVING
Thank you for purchasing an LMC industrial
fan. Your new LMC fan is built to the highest
industry standards. Great care has been taken
to design and manufacture a high quality, low
maintenance product that is economical to use
and maintain.
This manual is intended to assist in the installa-
tion, operation and maintenance of your fan. The
instructions in this manual are general in nature
and apply to a variety of models. Each situa-
tion dictates the need for any special precau-
tions and it is the user's responsibility to ensure
that adequate safety measures are employed in
installation, operation and maintenance. As al-
ways, follow good safety practices around all
equipment.
LMC fans are shipped completely assembled
and ready for immediate installation. Upon ar-
rival inspect all components for damage that
may have occurred during shipping. Check the
bill of lading or packing list to verify the proper
equipment and quantities. Should any discrep-
ancies arise contact the carrier immediately.
All fans should be lifted by the base or the lift-
ing angle on the fan housing (see fig. 7 back
page) using appropriately rated lifting equipment
(i.e. crane , forklift) using nylon slings or
spreader bars to prevent damage to the fan.
Never lift fan by shaft, drives, motor, wheel or
inlet and outlet flanges
INDUSTRIAL
FANS
MODELS: BC/BAF (ALL SIZES)
RBO/RBA (ALL SIZES)
JRW (ALL SIZES)
Introduction.....................................................1
Shipping and Receiving..................................1
Installation.......................................................2
Operation.........................................................2
Pre-start-up checklist.................................2
General Operation......................................2
Maintenance.....................................................3
Troubleshooting...............................................5
Order form........................................................6
CONTENTS
INSTALLATION, OPERATION AND MAINTENANCE MANUAL
Visit our website at www.lmcarter.com
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PUBLICATION NO: LMCW03A2
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INSTALLATION
OPERATION
Pre-start-up Checklist
All safety precautions have been fol-
lowed.
All electrical connections made and
locked off.
All bolt connections are tight. All Set
screws are tight.
All guards in place. All ducting is con-
nected.
All obstructions in fan housing and
drive are removed (i.e. tools, lifting
straps, etc.).
Manually rotate fan wheel to check for
any obstructions, or rubbing.
Check fan rotation by "bump" starting.
Rotation is marked on wheel or can be
determined using figure B.
Check drive alignment and tension.
Correct any problems found. Follow all
safety rules and procedures.
Start fan and bring to full speed. Ob-
serve operation for abnormal noise or
vibration.
After several minutes, one hour and one
week of operation check all bolt con-
nections, anchors, setscrews etc. and
tighten if necessary.
JURXW
VKLP
LMC fans arrive fully assembled and can be
installed immediately. Foundations or structural
supports must be designed to withstand both
static and dynamic loads induced by the fan.
Consult local codes for any other foundation or
structural requirements. All base mounting
holes must be used to ensure proper structural
stability. If mounting pad is uneven shim the
fan to level and then grout the entire frame to
provide support. See figure 1.
Ducting should be attached to the fan with flex
connections and must be independently sup-
ported. Connecting ducting directly to the fan
can damage the fan housing and/or may cause
vibration. Inlet vibration dampers are available
from LMC.
Fan inlets and discharges that are not attached
to ducting must have a guard in place. Optional
inlet guards and fan evases are available from
LMC.
FIGURE 1) Typical anchor detail
Make electrical connections as required by lo-
cal codes and the system into which the fan is
installed. Refer to motor label for wiring dia-
gram.
Prior to shipping, all LMC fan bearings are lu-
bricated with the proper amount of grease. If
the fan is stored for an extended period of time
prior to installation bearings should be inspected
for lubrication.
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PUBLICATION NO: LMCW03A2
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MAINTENANCE
LUBRICATION SCHEDULE (MONTHS)
FIGURE 3) Belt installation
63(('530
SHAFT DIA.
FIGURE 2) Fan wheel types
Motor H.P.
<10
15 to 40
50 to 150
extreme
9 mo.
3 mo.
63(&,),(')25&(
:521*
:521*
&255(&7
(48$/
(48$/
63(&,),('
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normal
3 years
yearly
5 years
1 1/2 years
6 mo.
15 mo.
dusty
2 1/2 years.
DO NOTE OVER LUBRICATE.
The following instructions and guidelines are
general in nature and should be adjusted to the
particular application. Whenever a problem
arises in any equipment, corrective measures
must be taken to ensure continued safe and re-
liable performance.
1) Motor
The motor should be kept dry, clean and prop-
erly lubricated to ensure optimal performance
and longevity. Dust can cause motors to over-
heat that can lead to failure. As conditions dic-
tate clean the motor periodically, following all
safety procedures. Motors also need to be lu-
bricated. Follow motor manufactures recom-
mended lubrication schedule. A typical lubri-
cation schedule is shown in fig.4.
FIGURE 4) Motor lubrication schedule
2)Bearings
Instructions covered in this section are
general and are intended to serve as a guide
for normal bearing maintenance. The bearing
manufacture's lubrication recommendation
and schedule should be followed. Excessive
lubricant will cause bearings to overheat.
Bearings should be kept clean and well lubri-
cated. Frequency of lubrication will be deter-
mined by the severity of environmental condi-
tions and applied loads. Figure 5 is a typical
lubrication schedule for bearings operating un-
der normal conditions.
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PUBLICATION NO: LMCW03A2
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3) Sheaves & Belts
Fans with v-belt drives need periodic belt main-
tenance. Belts should be inspected for wear,
frayed edges and proper tension. Sheaves must
be inspected for wear, alignment and other me-
chanical damage. Sheaves that are worn need
to be replaced.
Whenever replacing belts and/or sheaves always
use new parts. Use new set screws, bushings etc.
On multiple belt applications always replace the
entire set of belts with a matched set.
To replace belts the following procedure should
be followed. First lock out and tag fan motor to
prevent accidental start. Remove belt guard by
loosening the six retaining bolts. Loosen but
do not remove motor mount bolts. Adjust mo-
tor to loosen belts using motor base adjustment
bolt. On large motors a properly blocked bottle
jack can assist in moving the motor as the ad-
justment bolt is turned. Care should be taken to
prevent damage to the motor and/or injury. Belts
should be loosened so that they can be taken off
by sliding over the sheave rather than shifting
the belts from groove to groove.
If sheaves are to be removed loosen the setscrew
in bushing. Loosen and remove the three bush-
ing retaining bolts. Use all three retaining bolts
to extract the bushing by screwing them into the
threaded holes on the bushing. The bolts should
be tightened evenly to prevent damage to sheave,
shaft or bushing.
Clean and inspect all parts for wear and/or dam-
age. When installing sheave and bushing make
sure all mating surfaces including threads are
clean, dry and oil free. Place the motor sheave
as far onto the shaft as clearance allows. This
will minimize the overhung load on the shaft
and increase bearing life. Locate the driven
sheave using a straight edge as shown in fig.3.
Incementally tighten the three bushing bolts tak-
ing care not to warp the sheave. On large diam-
eter sheaves it is highly recommended that a dial
indicator be used to prevent excessive runout
due to a misaligned bushing. Belt and bearing life
will be shortened if sheaves are not properly aligned.
Torque all setscrews and bolts to manufacturer's
specified values. If torque specifications are not
available from component manufature consult fig-
ure 6.
Place all belts onto sheaves and tighten making sure
that sheaves remain in the same plane. Rotate
sheaves manually to help seat the belts while tight-
ening. Check belt tension by using a tension tester
or "fish" scale. Press on center of each belt and
check deflection for the specified force. See fig. 3.
For correct deflection contact the drive provider if
not LMC or LMC.
After belts are properly installed replace guard and
tighten bolts. New belts will require retightening
after about 1 week of operation. Check all bolt and
set screws at the same time.
4) Wheel and Shaft
Inspect fan wheel for wear and build up of dirt or
debris. Build up on fan wheels will cause an imbal-
ance that can lead to catastrophic failure. Check set
screws and retighten if necessary. Check for signs
of fatigue and/or corrosion. Special skills and equip-
ment are required to balance fan wheels therefore
this procedure should be left to a skilled profes-
sional.
Inspect fan shaft for trueness and signs of fatigue.
If the shaft is suspect it should be replaced with a
new LMC approved shaft.
5) Fan Housing & Base
The safety, reliability and performance of the fan
relies on the structural integrity of the fan housing
and base. Periodically inspect welds, bolt connec-
tions and anchors for fatigue and/or corrosion.
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PUBLICATION NO: LMCW03A2
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TYPE SIZE IN-LBS SIZE IN-LBS
H 1/4-20 90 NONE
JA 10-24 60 NONE
SH 1/4-20 108 1/4-20 87
SDS 1/4-20 108 1/4-20 87
SD 1/4-20 108 1/4-20 87
SK 5/16-18 180 1/4-20 87
SF 3/8-16 360 3/8-16 290
E 1/2-13 720 3/8-16 290
F 9/16-12 900 3/8-16 290
J 5/8-11 1620 1/2-13 620
M 3/4-10 2700 1/2-13 620
N 7/8-9 3600 5/8-11 1325
P 1-8 5400 5/8-11 1325
W 1 1/8-7 7200 3/4-10 2400
S 1 1/4-7 9000 1-8 7200
BOLT SIZE GRADE 2 GRADE 5 GRADE 8
1/4-20 4 6 9
5/16-18 813 19
3/8-16 14 23 33
7/16-14 23 39 56
1/2-13 35 58 88
9/19-12 52 87 128
5/8-11 75 120 179
3/4-10 124 206 304
7/8-9 169 313 492
1-8 260 493 706
Bolt Torques (Ft-Lbs)
Plated and cleaned bolts. Do NOT lubricate.
SIZE TORQUE UNITS
1/4 66 in-lbs
3/8 19 ft-lbs
1/2 42 ft-lbs
3/4 150 ft-lbs
Figure 6) Drive component torque specifications.
QD Bushing Torques (in-Lbs)
Cap Screw Set screw
TROUBLESHOOTING
Air Flow
a) System static pressure not at design level. Fan
may over speed drawing more horsepower.
b) Fan not operating at design speed
c) Wheel rotation reversed.
d) Ducting closed or plugged.
Vibration
a) Wheel misaligned, damaged or loose. Dirt build
up present.
b) Shaft bent or loose in bearings.
c) Bearings worn or failed.
d) Sheaves misaligned or belts worn
e) Anchor bolts loose, bearing bolts loose.
Noise
a) Worn or loose belts.
b) Bearings worn or lack lubrication.
c) Fan operating in unstable performance region.
Fan Wheel Set Screw Torques
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PUBLICATION NO: LMCW03A2
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PARTS ORDER FORM
MAIL TO: LMC Riverbank
Parts Dept.
5300 Claus Road
Riverbank, CA 95367
CUSTOMER NAME:
SHIPPING ADDRESS BILLING ADDRESS:
BELTS
BEARINGS
FAN WHEEL W/ INLET CONE
BELT GUARD
MOTOR
SHAFT
DRIVE SHEAVE
DRIVEN SHEAVE
DESCRIPTION QTY DESCRIPTION QTY
MODEL NO._______________________ SERIAL NO.______________________
PHOTOCOPY THIS FORM
OR FAX TO: (209)-869-0258
FIGURE 7) Fan assembly
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This manual suits for next models
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