Greenheck Fan Ventilation Hood LBP User Manual

PN 453283  
®
Series L: Models LB, LBP, LD, and LDP  
Low Silhouette Centrifugal Roof Exhaust Fans  
Installation, Operation and Maintenance Manual  
Please read and save these instructions for future reference. Read carefully before attempting  
to assemble, install, operate or maintain the product described. Protect yourself and others by  
observing all safety information. Failure to comply with instructions could result in personal injury  
and/or property damage!  
Series L Exhaust Fans  
Greenheck’s Series L, low silhouette, models LD, LB,  
LDP, and LBP centrifugal roof exhaust fans provide the  
industry’s best performance and durability for general clean  
air applications. Series L exhaust fans have the broadest  
performance in the industry, up to 1.25 in. wg (311 Pa) and  
37,500 cfm (63,713 m3/hr).  
The severe duty models LDP and LBP are far superior to  
any centrifugal roof exhaust fan currently in the market.  
Specifically designed for applications with extremely high  
structural design load requirements. Designed with structural  
steel supports and ESD-603D louver blades, the severe duty louver enclosure (SDLE) may be used in any  
application which requires a fan to endure high winds with the potential of wind blown debris. Miami-Dade  
notice of acceptance number 03-0422.05.  
General Safety Information  
Only qualified personnel should install this fan.  
Personnel should have a clear understanding of  
these instructions and should be aware of general  
safety precautions. Improper installation can result  
in electric shock, possible injury due to coming in  
contact with moving parts, as well as other potential  
hazards. Other considerations may be required  
if high winds or seismic activity are present. If  
more information is needed, contact a licensed  
professional engineer before moving forward.  
1. Follow all local electrical and safety codes, as  
well as the National Electrical Code (NEC) and  
the National Fire Protection Agency (NFPA),  
where applicable. Follow the Canadian Electric  
Code (CEC) in Canada.  
2. The rotation of the wheel is critical. It must be  
free to rotate without striking or rubbing any  
stationary objects.  
3. Motor must be securely and adequately  
grounded.  
4. Do not spin fan wheel faster than max cataloged  
fan RPM. Adjustments to fan speed significantly  
effects motor load. If the fan RPM is changed,  
the motor current should be checked to make  
sure it is not exceeding the motor nameplate  
amps.  
DANGER  
Always disconnect, lock and tag power source before  
installing or servicing. Failure to disconnect power source  
can result in fire, shock or serious injury.  
CAUTION  
5. Do not allow the power cable to kink or come  
in contact with oil, grease, hot surfaces,  
or chemicals. Replace cord immediately if  
damaged.  
6. Verify that the power source is compatible with  
the equipment.  
When servicing the fan, motor may be hot enough to  
cause pain or injury. Allow motor to cool before servicing.  
CAUTION  
Precaution should be taken in explosive atmospheres.  
7. Never open access doors to a duct while the fan  
is running.  
Series L: Models LB, LBP, LD, and LDP  
 
1
Machined parts coated with rust preventive should  
be restored to good condition promptly if signs of  
rust occur. Immediately remove the original rust  
preventive coating with petroleum solvent and clean  
with lint-free cloths. Polish any remaining rust from  
surface with crocus cloth or fine emery paper and  
oil. Do not destroy the continuity of the surfaces.  
Thoroughly wipe clean with Tectyl 506 (Ashland Inc.)  
®
or the equivalent. For hard to reach internal surfaces  
®
or for occasional use, consider using Tectyl 511M  
Rust Preventive, WD-40® or the equivalent.  
Series L Dimensions  
Damper Roof Weight  
Size Opening Galv.  
Size  
A
B
C
D
E
F
Model LB  
22  
39  
28 171 17 31  
12  
(305)  
16  
141  
(368)  
181  
(470)  
201  
(521)  
201  
(521)  
261  
(673)  
321  
(826)  
381  
(978)  
441  
(1130)  
501  
(1283)  
561  
(1435)  
56  
(25)  
81  
(37)  
135  
(61)  
145  
(66)  
188  
10  
14  
18  
21  
24  
30  
36  
42  
48  
54  
(559) (991) (711) (438) (432) (85)  
26  
(660) (991) (889) (445) (457) (102) (406)  
30  
(762) (991) (1016) (445) (533) (114) (457)  
30  
(762) (1295) (1092) (584) (584) (152) (457)  
34  
39  
35 171 18  
4
39  
40 171 21 41  
18  
B
51  
43  
23  
23  
6
18  
C
D
51 451 201 231 63  
24  
(864) (1295) (1156) (521) (597) (171) (610)  
50 291 2658 81  
(1016) (1600) (1270) (749) (676) (216) (762)  
27 3258 93  
(1168) (1600) (1524) (686) (829) (248) (914)  
75 7058 331 3738 111  
(1321) (1905) (1794) (851) (949) (292) (1067)  
87 7038 41 411 1158  
(1473) (2210) (1788) (1041) (1054) (295) (1219)  
87 791 38 4538 121  
(1626) (2210) (2019) (965) (1153) (318) (1372)  
(85)  
E
40  
46  
52  
58  
64  
63  
63  
30  
36  
42  
48  
54  
249  
(113)  
338  
(153)  
396  
(180)  
430  
(195)  
596  
(270)  
1.75  
60  
(44)  
F
A
A
Damper Roof Weight  
Size Opening Alum.  
Size  
A
B
C
D
E
F
Model LBP  
22 381 28  
14  
17 3258  
12  
141  
(368)  
181  
(470)  
201  
(521)  
201  
(521)  
261  
(673)  
321  
(826)  
381  
(978)  
441  
(1130)  
501  
(1283)  
561  
(1435)  
99  
(45)  
10  
14  
18  
21  
24  
30  
36  
42  
48  
54  
(559) (978) (711) (356) (432) (829) (305)  
26  
40  
32  
16  
17  
26  
16  
116  
(53)  
(660) (1016) (813) (406) (432) (660) (406)  
30  
46  
36  
19 241 30  
18  
179  
(81)  
(762) (1168) (914) (483) (622) (762) (457)  
B
30  
46  
36  
19 241 30  
18  
191  
(86)  
C
D
(762) (1168) (914) (483) (622) (762) (457)  
34 491 40  
20 231 34  
24  
239  
(108)  
318  
(144)  
444  
(201)  
530  
(240)  
579  
(263)  
780  
(354)  
(864) (1257) (1016) (508) (597) (864) (610)  
E
40  
58  
46  
23 261 40  
30  
(1016) (1473) (1168) (584) (673) (1016) (762)  
63 513 26 3438 46  
(1168) (1600) (1314) (660) (873) (1168) (914)  
1.75  
46  
52 701 58  
36  
42  
(44)  
A
F
29 381 52  
(1321) (1791) (1473) (737) (972) (1321) (1067)  
32 4038 58  
(1473) (1943) (1626) (813) (1026) (1473) (1219)  
35 4358 64  
(1626) (2121) (1778) (889) (1108) (1626) (1372)  
58 761 64  
64 831 70  
48  
54  
Damper Roof Weight  
Size Opening Galv.  
Size  
A
B
C
D
E
F
Model LD  
60- 17  
22  
27 131 13  
2
8
(203)  
101  
(267)  
37  
(17)  
C
B
D
75 (432) (559) (686) (343) (330) (51)  
80- 19 28 27 131 16  
95 (483) (711) (686) (343) (406) (102) (254)  
4
10  
121  
(318)  
45  
(20)  
E
1.75  
(44)  
F
100- 22  
30  
27 131 18  
4
12  
141  
(368)  
57  
(26)  
A
A
120 (559) (762) (686) (343) (457) (102) (305)  
Damper Roof Weight  
Size Opening Alum.  
Size  
A
B
C
D
E
F
Model LDP  
60- 17  
75 (432  
23  
(584)  
111 131  
(292) (343)  
8
(203)  
101  
(267)  
49  
(22)  
C
B
D
80- 19  
95 (483)  
25  
(635)  
121 161  
(318) (419)  
10  
(254)  
121  
(318)  
63  
(29)  
E
1.75  
(44)  
100- 22  
120 (559)  
28  
(711)  
14 181  
(356) (470)  
12  
(305)  
141  
(368)  
82  
(37)  
A
A
All dimensions given in inches (millimeters). Weights given in pounds (kilograms).  
Series L: Models LB, LBP, LD, and LDP  
 
3
®
Removing From Storage  
Pre-Starting Belt Tension Checks  
6. Always loosen tension enough to install belt  
without stretching, see Figure 3.  
As fans are removed from storage to be installed  
in their final location, they should be protected  
and maintained in a similar fashion until the fan  
equipment goes into operation.  
BELTS  
Pre-Startup Checks  
1. Check all fasteners for tightness. The wheel  
should rotate freely and be aligned as shown in  
Figure 1.  
Do not force belt(s). Forcing the  
belt(s) will break the cords and  
cause belt failure  
Figure 3  
WhEEL OVERLAP AND GAP DIMENSIONS  
7. If adjustments are made, it is very important  
to check the pulleys for proper alignment.  
Misaligned pulleys lead to excessive belt wear  
vibration, noise and power loss, see Figure 4.  
Model  
G - Overlap in. (mm)  
h - Gap in. (mm)  
LD/LDP 60-095  
LD/LDP 100-120  
LB/LBP 10-14  
LB/LBP 18-24  
LB/LBP 30-54  
332 (2)  
1
4  
(6)  
1
4
(6)  
3
8  
(10)  
(13)  
1
2  
G
H
Figure 4  
Figure 1  
8. Belt tension can be adjusted by loosening four  
fasteners (marked “R” in Figure 5) on the drive  
frame. This allows the motor plate to slide on the  
drive frame angles for proper positioning.  
2. Wheel position is preset and the unit is test  
run at the factory. Movement may occur during  
shipment, and realignment may be necessary.  
3. Centering can be accomplished by loosening  
the bolts holding the drive frame to the shock  
mounts and repositioning the drive frame.  
4. Wheel and inlet cone overlap can be adjusted  
by loosening the setscrews in the wheel and  
moving the wheel to the desired position.  
5. Check wheel rotation by momentarily energizing  
the unit. Rotation should be clockwise as shown  
in Figure 2 and correspond to the rotation decal  
on the unit. Rotation is determined when the unit  
is viewed from the motor or shaft pulley side.  
FASTENERS  
*Identical fasteners on  
opposing side must  
also be loosened.  
R
Figure 5  
9. Belt tension should be adjusted to allow 164 in.  
(0.397 mm) of deflection per inch of belt span.  
For example, a 15 in. (381 mm) belt span should  
have 1564 in. (0.234 mm) (or about 14 in. (6 mm))  
of deflection with moderate thumb pressure at  
mid-point between pulleys, see Figure 6.  
WhEEL ROTATION  
All Series L fans have  
clockwise (CW) wheel  
rotation when viewed  
from top of fan.  
WARNING  
Figure 2  
l
e
The fan has been checked for mechanical noises at  
the factory prior to shipment. If mechanical noise  
should develop, suggested corrective actions are  
offered in the Troubleshooting section.  
c
s
kw  
WARNING  
Correct direction of wheel rotation is critical.  
Reversed rotation will result in poor air  
performance, motor overloading and possible  
motor burnout.  
WARNING  
Over tightening will cause excessive bearing wear  
and noise. Too little tension will cause slippage at  
startup and uneven wear.  
4
Series L: Models LB, LBP, LD, and LDP  
 
®
WARNING  
Always disconnect, lock and tag power source before  
servicing. Failure to disconnect power source can  
result in fire, shock or serious injury.  
WARNING  
Belt Span  
64  
Deflection=  
Belt Span  
Uneven cleaning of the wheel will produce an out of  
balance condition that will cause vibration in the fan.  
WARNING  
This unit should be made non-functional when  
cleaning the wheel or housing (fuses removed,  
disconnect locked off).  
Figure 6  
Belt/Bearing Maintenance  
1. Belts tend to stretch after a period of time. They  
should be checked periodically for wear and  
tightness. When replacing belts, use the same  
type as supplied with the unit.  
10. The adjustable motor pulley is factory set for  
the RPM specified. Speed can be increased by  
closing or decreased by opening the adjustable  
motor sheave.  
2. Matched belts should always be used on units  
with multi-groove pulleys.  
11. Two groove variable pitch pulleys must be  
adjusted an equal number of turns open or  
closed.  
12. Any increase in speed represents a substantial  
increase in the horsepower required by a unit.  
13. Motor amperage should always be checked to  
avoid serious damage to the motor when speed  
is varied.  
3. For belt replacement, loosen the tensioning  
device far enough to allow removal of the belt  
by hand. Do not force belts on or off. This may  
cause cords to break, leading to premature belt  
failure.  
4. Once installed, adjust belts as shown in “Pre-  
Starting Checks.”  
5. Shaft bearings can be classified in two groups:  
relubricating and non-relubricating. All bearings  
are factory lubricated and require no further  
lubrication under normal use (between -20ºF  
and 180ºF (-29° to 82°C) in a relatively clean  
environment).  
6. Units installed in hot, humid or dirty locations  
should be equipped with special bearings.  
These bearings will require frequent lubrication.  
Caution should be employed to prevent  
overpacking or contamination.  
7. Grease fittings should be wiped clean. The  
unit should be in operation while lubricating.  
Extreme care should be used around moving  
parts.  
8. Grease should be pumped in very slowly until a  
slight bead forms around the seal. A high-grade  
lithium base grease is recommended.  
9. Direct drive units require little maintenance  
except for cleaning, wheel alignment, and oiling  
according to motor label instructions.  
IMPORTANT  
Adjust (tighten) belt tension after the first  
24-48 hours of operation.  
Maintenance  
Motor maintenance is generally limited to cleaning  
and lubrication (where applicable). Cleaning should  
be limited to exterior surfaces only. Removing dust  
buildup on motor housing ensures proper motor  
cooling.  
Greasing of motors is only intended when fittings  
are provided. Many fractional hp motors are  
permanently lubricated and should not be lubricated  
further. Motors supplied with grease fittings should  
be greased in accordance with manufacturers’  
recommendations. Where motor temperatures do not  
exceed 104ºF (40ºC), the grease should be replaced  
after 2000 hours of running time as a general rule.  
Wheels require very little attention when moving  
clean air. Occasionally, oil and dust may accumulate  
causing imbalance. When this occurs, the wheel and  
housing should be cleaned to ensure smooth and  
safe operation.  
All fasteners should be checked for tightness each  
time maintenance checks are performed prior to  
restarting unit.  
A proper maintenance program will help these units  
deliver years of dependable service.  
Series L: Models LB, LBP, LD, and LDP  
 
5
®
Parts List  
NOTE: Each fan bears a manufacturer’s nameplate with model number and serial number embossed. This information  
will assist the local Greenheck representative and the factory in providing service and replacement parts. Before taking  
any corrective action, make certain unit is not capable of operation during repairs.  
CAUTION: A fan manufactured with an explosion-resistant motor does not certify the entire unit to be explosion proof.  
Refer to UL Listing Mark for the fans approved usage.  
FABRA hOOD STYLE  
FAN ShAFT  
DRIVE  
ASSEMBLY  
VIBRATION  
ISOLATORS  
BIRDSCREEN  
hINGED  
ACCESS  
WINDBAND  
CURB CAP  
MOTOR  
DRIVE  
FRAME  
WhEEL  
hOOD COVER  
BIRDSCREEN  
MOTOR  
FAN  
ShAFT  
DRIVE  
ASSEMBLY  
DRIVE  
FRAME  
LOUVERED  
PENThOUSE  
WhEEL  
6
Series L: Models LB, LBP, LD, and LDP  
 
®
Troubleshooting  
WARNING: Before taking any corrective action, make certain unit is not capable of operation during repairs.  
PROBLEM  
CAUSE  
CORRECTIVE ACTION  
Check system for proper operation of backdraft or  
control dampers; remove obstructions in ductwork, etc.  
System resistance too high  
Unit running backwards  
Fan speed too low  
See Pre-Starting Checks.  
Increase fan speed.  
Reduced Airflow  
Excessive dirt buildup on  
wheel  
Clean wheel.  
Improper wheel alignment  
Bad Bearings  
Center wheel on inlets.  
Replace.  
Belts too tight or too loose  
Refer to Figure 4 and adjust tension.  
Wheel improperly aligned and  
rubbing  
Center wheel on inlets. See Figure 1.  
Excessive Noise  
or Vibration  
Loose drive or motor pulleys  
Align and tighten. See Pre-Start-up Checks.  
Remove objects, check for damage or unbalance.  
Foreign objects in wheel or  
housing  
Unbalance of wheel caused  
by excessive dirt and grease  
buildup  
Remove buildup.  
Maintenance Documentation  
Job Information  
Job Name:___________________________________ Service Organization: _________________________________  
Address: ____________________________________ Address:_____________________________________________  
City: ________________________________________ City:_________________________________________________  
State: _______________ Zip:__________________ State: _______________ Zip:__________________________  
Phone: ______________________________________ Phone: ______________________________________________  
Contact Person:______________________________ Work Done By: _______________________________________  
Nameplate Information  
Field Start-Up Documentation  
Model: ______________________________________  
Volts: ________ hertz:________ Phase:______ Actual Voltage: _______ hertz:______ Phase:_________  
Amps:_______________ Mark: ________________ Actual Amperage: ____________________________________  
Supply hp:___________ Exhaust hp: __________ Blower Rotation: _____________________________________  
Serial Number:_______________________________ Air Volume: Design cfm: _____________________________  
Model Voltage:_______________________________  
Actual cfm:______________________________  
Motor Amperage: ____________________________ Level of fan (L or h): __________________________________  
Fan RPM: ___________________________________ Fan RPM Range (min.) ___________ (max.) _____________  
Series L: Models LB, LBP, LD, and LDP  
 
7
®
Maintenance Log  
Date  
Time  
Notes  
Warranty  
Greenheck warrants this equipment to be free from defects in material and workmanship for a period of one year  
from the purchase date. Any units or parts which prove defective during the warranty period will be replaced at  
our option when returned to our factory, transportation prepaid. Motors are warranted by the motor manufacturer  
for a period of one year. Should motors furnished by Greenheck prove defective during this period, they should  
be returned to the nearest authorized motor service station. Greenheck will not be responsible for any removal or  
installation costs.  
As a result of our commitment to continuous improvement, Greenheck reserves the right to change specifications  
without notice.  
AMCA Publication 410-96, Safety Practices for Users and  
Greenheck Catalog Series L provides additional  
Installers of Industrial and Commercial Fans, provides  
information describing the equipment, fan performance,  
additional safety information. This publication can be obtained  
available accessories, and specification data.  
®
Phone: (715) 359-6171 • Fax: (715) 355-2399 • E-mail: [email protected]Website: www.greenheck.com  
8
453283 • LB/LBP/LD/LDP Series L IOM • Rev. 2, June 2008  
Copyright 2008 © Greenheck Fan Corp.  
 

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