L.B. White 24D370 User manual

Inspection
After unpacking your exhaust
fan, carefully inspect for any
damage that may have oc-
curred during transit. Inspect
for loose, missing or damaged
parts. If there is physical dam-
age 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
Direct Drive
24D370,
36D370-N,
36D370T-N,
Owner’s Manual and Instructions
View this manual online at www.lbwhite.com
SEE INSTALLATION
INSTRUCTIONS
INSIDE
36D370S-N,
48D750-N,
48D750T-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 .................................................................................................. 6
Service Parts Identication Schematic .......................................................................... 7
Replacement Parts and Service.................................................................................... 8
Warranty ........................................................................................................................ 8

Galvanized Box Fans
Owner’s Manual • Galvanized Box Fans
3
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
■ 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 AND
ORDINANCES.
■ 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 OR FRAMEWORK.
■ 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.
WARNING
Cancer and reproductive harm.
See www.P65Warnings.ca.gov

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Owner’s Manual • Galvanized Box Fans
4
Specifications
Dimension (in.) Rough-in Opening
Model Prop Dia. A B C D Height Width Ship Wt Ship. Dims.
24D370 24” 29 1/4 14 1/2 -3/8 30 30 88 33x18x35
36D370-N 36” 40 1/8 14 -3/8 40 3/4 40 3/4 118 44x18x47
36D370S-N 36” 40 1/8 14 16 3/8 40 3/4 40 3/4 138 48x18x47
36D370T-N 36” 40 1/8 14 -3/8 40 3/4 40 3/4 118 44x18x47
48D750-N 48” 52 1/8 17 -3/8 52 7/8 52 7/8 165 56x20x58
48D750T-N 48” 52 1/8 17 -20 52 7/8 52 7/8 168 56x20x58
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
24D370 1/2 5.6/2.8 115/230 160 110 0 5,618 5,192 4,845 4,505 11.3 10.2 9.3 8.4 73.5
36D370-N 1/2 5.2/2.6 115/230 160 825 11,077 10,217 9,381 8,557 21.1 18.6 16.4 14.5 76.0
36D370S-N 1/2 5.2/2.6 115/230 160 825 10,525 9,698 8,910 8,130 20.6 18.2 15.9 14.0 77.0
36D370T-N 1/2 2.2/1.1 230/460 360 825 11,150 10,280 9,450 9,625 21.0 18.6 16.3 14.4 76.0
48D750-N 111.0/5.5 115/230 160 850 18,926 17,4 81 15,973 14,256 19.9 17.8 15.8 13.7 80.0
48D750T-N 14.6/2.3 230/460 360 850 19,001 17,507 16,097 14,625 21.6 19.0 16.9 14.9 80.0

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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.
Maintenance

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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 connec-
tions
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

Galvanized Box Fans
Owner’s Manual • Galvanized Box Fans
7
Galvanized Box Fan Models
Service Parts Identification Schematic
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 connec-
tions
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
Note: Aluminum discharge shutter not shown.
Item Description 24D370 36D370-N 36D370S-N 36D370T-N 48D750-N 48D750-N
1Intake & Discharge screen 24SCREEN-N 36SCREEN-N 36SCREEN-N 36SCREEN-N 48SCREEN-N 48SCREEN-N
2Self tapping screw S002 S002 S002 S002 S002 S002
3 Clip for screen CLIP-SC CLIP-SC CLIP-SC CLIP-SC CLIP-SC CLIP-SC
4Motor B370-6E B370-8E B370-8E B370-8TE A750-8VE A750-8TVE
5Upright frame piece N/A N/A N/A N/A N/A N/A
6Side panel piece N/A N/A N/A N/A N/A N/A
7Locking nut, 5/16-18 N004 N004 N004 N004 N004 N004
8Hex head bolt, 5/16-18X1” B011 B011 B011 B011 B011 B011
9Venturi panel N/A N/A N/A N/A N/A N/A
10 Carriage bolt, 5/16-18X3/4” B014 B014 B014 B014 B014 B014
11 Locking nut, 10-32 N002 N002 N002 N002 N/A N/A
12 Propeller 9001566 9001481 9001481 9001481 9001567 9001567
13 Motor mounting plate N/A N/A N/A N/A N/A N/A
-Alum discharge shutter N/A N/A SA36DX N/A N/A N/A

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
150-133455 REV.A