L.B. White 36X370-N Manual

Inspection
After unpacking your exhaust
fan, carefully inspect for any
damage that may have
occurred during transit.
Inspect for loose, missing or
damaged parts. If there is
physical damage to any parts
of the fan, a freight claim must
be led with the carrier.
Check to assure that all bolts,
screws and set screws are
securely tightened and have
not become loose during
transit. Retighten as required.
Rotate propeller by hand to
assure it turns freely.
www.lbwhite.com
WORLD PROVIDER - INNOVATIVE CLIMATE SOLUTIONS
411 Mason Street, Onalaska, WI 54650 • 800-345-7200 • 608-783-5691 • 608-783-6115 (fax) • www.lbwhite.com
Congratulations!
Your new L.B. White galvanized box fan incorporates the benets
from the most experienced manufacturer of climate control
products using state-of-the-art technology.
We, at L.B. White, thank you for your condence in our products
and welcome any suggestions or comments you may have...call
us, toll-free, at [phone].
Galvanized
Box Fans
Belt Drive
36X370-N
36X550-N
36X550S-N
Owner’s Manual and Instructions
View this manual online at www.lbwhite.com
SEE INSTALLATION
INSTRUCTIONS
INSIDE
48X750-N
48X750S-N

Galvanized Box Fans
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Owner’s Manual • Galvanized Box Fans
2
TABLE OF CONTENTS
Specications ................................................................................................................ 4
Performance.................................................................................................................. 4
Fan Installation .............................................................................................................. 5
Maintenance.................................................................................................................. 5
Troubleshooting Guide .................................................................................................. 5
Service Parts Identication Schematic .......................................................................... 6
Replacement Parts and Service.................................................................................... 8
Warranty ........................................................................................................................ 8

Galvanized Box Fans
Owner’s Manual • Galvanized Box Fans
3
WARNING
■ READ AND FOLLOW ALL INSTRUCTIONS, CAUTIONS, DANGERS AND WARNINGS. FAILURE
TO DO SO COULD RESULT IN PERSONAL INJURY, DEATH OR PROPERTY DAMAGE.
■ MAKE SURE THE ELECTRICAL POWER SOURCE CONFORMS TO THE REQUIREMENT OF
THE FAN(S) AS WELL AS LOCAL CODES.
■ ELECTRICAL CONNECTIONS, INSTALLATION AND MAINTENANCE MUST BE DONE BY
QUALIFIED ELECTRICAL PERSONNEL IN ACCORDANCE WITH ALL APPLICABLE CODES
ANDORDINANCES.
■ UNIT MUST BE ADEQUATELY GROUNDED.
■ TO REDUCE THE RISK OF FIRE OR ELECTRICAL SHOCK, DO NOT EXPOSE THIS FAN TO
WATER.
■ DO NOT TOUCH ELECTRICALLY LIVE COMPONENTS.
■ FREE ROTATION OF THE PROPELLER IS CRITICAL. IT MUST NOT TOUCH ANY PART OF THE
VENTURI, FRAMEWORK OR DRIVE COMPONENTS.
■ ASSURE THAT ALL POWER CORDS DO NOT COME IN CONTACT WITH ANY SHARP EDGES,
HOT SURFACES OR CHEMICALS. IMMEDIATELY REPLACE ANY DAMAGED CORDS.
CAUTION
OSHA REQUIRES OSHA COMPLIANT GUARDS WHEN FAN IS INSTALLED WITHIN 7FT OF THE
FLOOR OR WORKING LEVEL.
DANGER
BEFORE INSTALLING OR SERVICING, ALWAYS LOCK OUT AND TAG POWER SOURCE. DO
NOT RELY ON A SWITCH AS THE ONLY MEANS OF DISCONNECTING POWER. FAILURE TO
DISCONNECT POWER CAN RESULT IN FIRE, ELECTRICAL SHOCK OR SERIOUS INJURY.
MOTOR WILL RESTART WITHOUT WARNING AFTER THERMAL PROTECTOR TRIPS. DO NOT
TOUCH AN OPERATING MOTOR AS IT MAY BE HOT ENOUGH TO CAUSE INJURY. DO NOT
PLACE ANY BODY PARTS OR OBJECTS IN FAN OR DRIVE COMPONENTS WHILE FAN IS
CONNECTED TO A POWER SOURCE.
WARNING
Cancer and reproductive harm.
See www.P65Warnings.ca.gov

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4
Specifications
Dimension (in.) Rough-in Opening
Model Prop Dia. A B C D Height Width Ship Wt Ship. Dims.
36X370-N 36” 40 1/8 14 18 3/8 40 3/4 40 3/4 110 44x22x47
36X550-N 36” 40 1/8 14 18 3/8 40 3/4 40 3/4 115 44x22x47
36X550S-N 36” 40 1/8 17 21 3/8 40 3/4 40 3/4 130 44x25x47
36X750-N 48” 52 1/8 17 22 3/8 52 7/8 52 7/8 128 56x26x58
36X750S-N 48” 52 1/8 20 25 3/8 52 7/8 52 7/8 150 56x29x58
Performance
CFM CFM/Watt
Model HP F.L. A . Volt. Ph Hz
Motor
RPM
0.00”
SP
0.05”
SP
0.10”
SP
0.15”
SP
0.00”
SP
0.05”
SP
0.10”
SP
0.15”
SP
Db
0.00”
SP
36X370-N 1/2 4.8/2.4 115/230 160 1725 10,850 9,990 9,020 7,200 18.4 16.5 14.6 11.4 73
36X550-N 3/4 7.2/3.6 115/230 160 1725 11,598 10,757 10,052 9,277 19.3 17 15.3 13.7 74
36X550S-N 3/4 7. 2/ 3.6 115/230 160 1725 11,010 10,219 9,549 8,813 18.6 16.4 15.6 13.1 74.8
36X750-N 19.0/4.5 115/230 160 1725 19,608 18,228 16,773 15,347 21.6 19.5 17.3 15.4 77.9
36X750S-N 19.0/4.5 115/230 160 1725 19,210 17, 49 9 16,185 14,825 20.9 18.8 16.5 14.7 78.2

Galvanized Box Fans
Owner’s Manual • Galvanized Box Fans
5
For framing dimensions, refer to rough-in opening height and width shown in the specications above.
Position the fan for desired airow. Air will discharge on the side of the fan facing the propeller.
Assure the fan is fastened securely in the opening to avoid excess “rattling” or vibration using proper fasteners.
Fasteners not included.
Refer to motor nameplate for wiring diagram.
Fan Installation
CAUTION
BEFORE OPERATING YOUR NEW FAN, CHECK BLADE FOR PROPER TORQUE, CHECK ALL
FASTENERS FOR TIGHTNESS AND ASSURE SCREENS AND/OR SHUTTERS ARE SECURELY
IN PLACE.
Periodic maintenance schedules should be set to assure reliability and performance of the fan. This maintenance
should included inspection of all
fasteners, propeller torque and proper cleaning of the complete fan assembly.
Check for excessive vibration while fan is running.
Periodically inspect and tighten all set screws and hardware.
Assure all mounting hardware, chains, etc. are properly secured.
Motors feature permanently sealed ball bearings and require no further lubrication.
The fan propeller should be periodically cleaned to assure proper balance and performance.
Grease pillow block bearings seasonally. Use caution not to apply too much grease as it may damage the seals.
Periodically check for proper belt alignment.
Maintenance
Troubleshooting Guide
Symptom Possible Cause(s) Corrective Action
Fan will not start 1. Tripped circuit breaker
2. Defective motor
3. Incorrectly wired
4. Electricity turned off
1. Reset circuit breaker
2. Repair or replace
3. Shut off power, check for proper connections
4. Contact local power company
Excessive noise or vibration 1. Blade is hitting housing
2. Blade is bent
3. Fan not securely anchored
4. Bad/noisy bearings
1. Free blade of obstruction
2. Replace blade
3. Secure properly
4. Replace motor
Insufcient airow 1. Incorrect voltage applied
2. Defective motor
3. Propeller is damaged
4. Blocked Airow
5. Not enough intake air
6. Fan is dirty
1. Wire properly
2. Replace motor
3. Replace propeller
4. Remove obstructions
5. Add additional air intake openings
6. Clean fan guards/screens, motor and propeller
Motor overheats or trips out 1. Over/under line voltage
2. Defective motor
3. Fan is dirty.
4. Not enough intake air
1. Contact local power company
2. Replace motor
3. Clean fan guards/screens, motor and propeller
4. Add additional air intake openings

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Galvanized Box Fan Models
Service Parts Identification Schematic
Note: Aluminum discharge shutter not shown.

Galvanized Box Fans
Owner’s Manual • Galvanized Box Fans
7
Item Description 36X370-N 36X550-N 48X750-N 36X550S-N 48X750-N
1Intake & Discharge screen 36SCREEN-N 36SCREEN-N 48SCREEN-N 36SCREEN-N 48SCREEN-N
2Motor A370-4CE A550-4CE A750-4CE A550-4CE A750-4CE
3 Motor mounting plate N/A N/A N/A N/A N/A
4Side housing panels N/A N/A N/A N/A N/A
5Large drive pulley AL94 AL94 AL94 AL94 AL94
6V belt, cogged AX51 A X51 AX61 AX51 AX61
7Venturi panel N/A N/A N/A N/A N/A
8Horizontal frame piece N/A N/A N/A N/A N/A
9Propeller 9001565 9001565 9001489 9001565 9001489
10 Horizontal frame bracket, small N/A N/A N/A N/A N/A
11 Horizontal frame bracket, large N/A N/A N/A N/A N/A
12 Motor pulley AK3958 AK3958 AK3258 AK3958 AK3258
13 Tensioner bracket(optional) N/A N/A N/A N/A N/A
14 Belt tensioner(optional) BTI BTI BTI BTI BTI
15 Bearing UCP205 -16 UCP205-16 UCP205-16 UCP205-16 UCP205 -16
16 Fan shaft, 1” FS7.5 FS7.5 FS7.5 FS7. 5 FS7.5
17 Self tapping screw S002 S002 S002 S002 S002
18 Clip for holding screen CLIP-SC CLIP-SC CLIP-SC CLIP-SC CLIP-SC
19 Locking nut, 5/16-18 N004 N004 N004 N004 N004
20 Carriage bolt, 5/16-18X3/4” B014 B014 B014 B014 B014
21 Hex head bolt, 5/16-18X1” B011 B011 B011 B011 B011
22 Hex head bolt, 3/8-16X3/4” B019 B019 B019 B019 B019
23 Hex head bolt, 3/8-16X1 1/4” B006 B006 B006 B006 B006
24 Keyway, 1/4”X1/4” N/A N/A N/A N/A N/A
25 Locking nut, 3/8-16 N003 N003 N003 N003 N003
26 Hex head bolt, 5/16-18X1 3/4” B015 B015 B015 B015 B015
-Alum Discharge Shutter N/A N/A N/A SA36X-N SA48X-N

Replacement Parts and Service
Contact your local L.B. White dealer for replacement parts and service or call the L.B. White Co., Inc. at [phone]
for assistance. Be sure that you have your heater model number and conguration number when calling.
WARRANTY
L.B. White Company, LLC warrants that it’s manufactured products are free from defects in material and workmanship,
when properly installed, operated, and maintained in accordance with the Installation and Maintenance Instructions,
safety guides and labels contained with each unit. If, within 12 months from the date of purchase by the end user, any
component is found to be defective, L.B. White Company, LLC will at its option, repair or replace the defective part, with a
new part, F.O.B., Onalaska, Wisconsin or Franklin, Georgia. A copy of the bill of sale will be required to establish warranty
qualication. If not available, the warranty period will be 12 months from date of shipment from L B. White.
The warranty set forth above is the exclusive warranty provided by L.B. White, and all other warranties, including any
implied warranties or merchantability or tness for a particular purpose, are expressly disclaimed. In the event any implied
warranty is not hereby effectively disclaimed due to operation of law, such implied warranty is limited in duration to the
duration of the applicable warranty stated above. The remedies set forth above are the sole and exclusive remedies
available hereunder. L.B. White will not be liable for any incidental or consequential damages directly or indirectly related
to the sale, handling or use of the equipment, and in any event L.B. White’s liability in connection with the equipment,
including for claims based on negligence or strict liability, is limited to the purchase price.
Some states do not allow limitations on how long an implied warranty lasts, so the above limitation may not apply to you.
Some states do not allow the exclusion or limitation of incidental or consequential damages, so the above limitation or
exclusion may not apply to you. This warranty gives you specic legal rights, and you may also have other rights which
vary from state to state.
WORLD PROVIDER - INNOVATIVE
CLIMATE SOLUTIONS
411 Mason Street, Onalaska, WI 54650
800-345-7200 • 608-783-5691
608-783-6115 (fax)
www.lbwhite.com
150-133456 REV.A