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)
50 291 265⁄8 81
(1016) (1600) (1270) (749) (676) (216) (762)
27 325⁄8 93
(1168) (1600) (1524) (686) (829) (248) (914)
75 705⁄8 331 373⁄8 111
(1321) (1905) (1794) (851) (949) (292) (1067)
87 703⁄8 41 411 115⁄8
(1473) (2210) (1788) (1041) (1054) (295) (1219)
87 791 38 453⁄8 121
(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
17 325⁄8
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 26 343⁄8 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)
32 403⁄8 58
(1473) (1943) (1626) (813) (1026) (1473) (1219)
35 435⁄8 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
–
3⁄32 (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 1⁄64 in.
(0.397 mm) of deflection per inch of belt span.
For example, a 15 in. (381 mm) belt span should
have 15⁄64 in. (0.234 mm) (or about 1⁄4 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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