Centrifugal Sidewall Exhaust Fans CW/CWB 457691CWCWB Iom
User Manual: Centrifugal Sidewall Exhaust Fans CW/CWB
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®
Document 457691
Model CW Direct Drive
Model CWB Belt Drive
Centrifugal Sidewall Exhaust
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!
Centrifugal Sidewall Exhaust 1
®
Model CW Direct Drive
Model CW is a direct drive centrifugal
sidewall exhaust fan. These fans are
specifically designed for wall mounted
applications. Performance capabilities range
up to 6,400cfm (10,874m3/hr) and up to
3in.wg (747Pa) of static pressure. The
maximum continuous operating temperature
for fan sizes 098-200 is 400°F (204°C) and for fan
sizes 060-095 is 130°F (54°C). CW fans are available
in 20 sizes with nominal wheel diameter ranging
from 9 to 20 inches (229mm to 508mm) (060-200
unit sizes). Each fan shall bear a permanently affixed
manufacturer’s engraved metal nameplate containing
the model number and individual serial number.
Model CWB Belt Drive
Model CWB is a belt drive centrifugal
sidewall exhaust fan. These fans are
specifically designed for wall mounted
applications. Performance capabilities range
up to 12,500 cfm (21,200 m3/hr) and up to
2.75in.wg (685Pa) of static pressure. The
maximum continuous operating temperature
is 400°F (204°C). CWB fans are available in nineteen
sizes with nominal wheel diameter ranging from 10
to 30 inches (254 to 762 mm) (099-300unitsizes).
Each fan shall bear a permanently affixed
manufacturer’s engraved metal nameplate containing
the model number and individual serial number.
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 is 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
affects 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.
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.
7. Never open access doors to a duct while the fan is
running.
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
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.
DANGER
Pour écarter les risques d’incendie, de choc
électrique ou de blessure grave, veiller à toujours
débrancher, verrouiller et étiqueter la source de
courant avant l’installation ou l’entretien.
ATTENTION
Lors de toute intervention sur la soufflante, le moteur
peut être suffisamment chaud pour provoquer une
douleur voire une blessure. Laisser le moteur refroidir
avant toute maintenance.
ATTENTION
Faire preuve de précaution dans les atmosphères
explosives.
Centrifugal Sidewall Exhaust2®
Receiving
Upon receiving the product, check to ensure all
items are accounted for by referencing the delivery
receipt or packing list. Inspect each crate or carton
for shipping damage before accepting delivery. Alert
the carrier of any damage detected. The customer
will make a notation of damage (or shortage of items)
on the delivery receipt and all copies of the bill of
lading which is countersigned by the delivering carrier.
If damaged, immediately contact your Greenheck
Representative. Any physical damage to the unit after
acceptance is not the responsibility of Greenheck Fan
Corporation.
Unpacking
Verify that all required parts and the correct quantity
of each item have been received. If any items are
missing, report shortages to your local representative
to arrange for obtaining missing parts. Sometimes it
is not possible that all items for the unit be shipped
together due to availability of transportation and truck
space. Confirmation of shipment(s) must be limited to
only items on the bill of lading.
Handling
The motor amperage and voltage ratings must be
checked for compatibility to supply voltage prior to
final electrical connection. For CW/CWB installations,
the electrical supply should be routed through the
conduit chase located between the mounting plate
and the bottom of the motor compartment. Wiring
must conform to local and national codes.
Storage
Fans are protected against damage during shipment.
If the unit cannot be installed and operated
immediately, precautions need to be taken to prevent
deterioration of the unit during storage. The user
assumes responsibility of the fan and accessories
while in storage. Greenheck Fan Corporation will not
be responsible for damage during storage. These
suggestions are provided solely as a convenience to
the user.
Indoor - The ideal environment for the storage of
fans and accessories is indoors, above grade, in a
low humidity atmosphere which is sealed to prevent
the entry of blowing dust, rain or snow. Temperatures
should be evenly maintained between 30° to 110°F
(wide temperature swings may cause condensation
and “sweating” of metal parts). All accessories must
be stored indoors in a clean, dry atmosphere.
Remove any accumulations of dirt, water, ice, or snow
and wipe dry before moving to indoor storage. To
avoid “sweating” of metal parts, allow cold parts to
reach room temperature. To dry parts and packages
use a portable electric heater to get rid of any
moisture buildup. Leave coverings loose to permit air
circulation and to allow for periodic inspection.
The unit should be stored at least 3½ inches (89 mm)
off the floor on wooden blocks covered with moisture
proof paper or polyethylene sheathing. Aisles between
parts and along all walls should be provided to permit
air circulation and space for inspection.
Outdoor - Fans designed for outdoor applications
may be stored outdoors, if absolutely necessary.
Roads or aisles for portable cranes and hauling
equipment are needed.
The fan should be placed on a level surface to prevent
water from leaking into the fan. The fan should be
elevated on an adequate number of wooden blocks
so that it is above water and snow levels and has
enough blocking to prevent it from settling into soft
ground. Locate parts far enough apart to permit air
circulation, sunlight and space for periodic inspection.
To minimize water accumulation, place all fan parts on
blocking supports so that rain water will run off.
Do not cover parts with plastic film or tarps as these
cause condensation of moisture from the air passing
through heating and cooling cycles.
Fan wheels should be blocked to prevent spinning
caused by strong winds.
IMPORTANT
Do not lift by the fan hood. Avoid lifting fans in a
way that will bend or distort fan parts. Never pass
slings or timbers through the venturi of fan. Fans
with special coatings or paints must be protected in
handling to prevent damage.
Table of Contents
Receiving, Unpacking, Handling, Storage ....... 2
Inspection and Maintenance During Storage ..... 3
Removing from Storage ..................... 3
Dimensional Data .......................... 3
Installation
Typical Wall Mounting ...................... 4
Commercial Kitchen ....................... 5
Mounting for Severe Duty ................... 5
Pre-Starting Checks .......................6-7
Operation ................................. 7
Inspection ................................ 7
Maintenance .............................. 8
Tapered Bushing Hub Installation & Removal . . . 9
Recommended Bearing Lubrication .......... 10
Parts List ................................ 10
Troubleshooting ........................... 11
Our Commitment .......................... 12
Centrifugal Sidewall Exhaust 3
®
Mounting Hole Bolt Circle
C
*
A
B**
Damper Size
Wall Opening
Damper Frame Size
5 in. (127 mm)
C
*
A
B**
Wall Opening
Damper Frame Size
Damper Size
Mounting Hole Bolt Circle
5 in. (127 mm)
CW - Direct Drive Dimensions
Model A B** C Wall
Opening
Damper
Size
Damper
Frame
Size
Mounting
Bolt
Circle
CW-060, 065,
070, 075
183⁄8
(467)
131⁄2
(343)
143⁄4
(375)
81⁄2
(216)
8
(203)
10
(254)
113⁄4
(298)
CW-080, 085,
090
21
(533)
133⁄8
(340)
177⁄8
(454)
101⁄2
(267)
10
(254)
12
(305)
15
(381)
CW-095 21
(533)
151⁄4
(387)
177⁄8
(454)
101⁄2
(267)
10
(254)
12
(305)
15
(381)
CW-098, 101,
121, 131
247⁄8
(632)
281⁄4
(718)
193⁄4
(502)
121⁄2
(318)
12
(305)
14
(356)
167⁄8
(429)
CW-141, 161 287⁄8
(733)
293⁄4
(756)
221⁄8
(562)
151⁄2
(394)
15
(381)
17
(432)
193⁄8
(492)
CW-180, 200 353⁄8
(905)
285⁄8
(727)
273⁄4
(705)
171⁄2
(445)
17
(432)
19
(483)
25
(635)
All dimensions in inches (millimeters). *NOTE: 2 inches minimum, 8 inches when
motorized option is required. **May vary depending on motor size.
CWB - Belt Drive Dimensions
Model A B** C Wall
Opening
Damper
Size
Damper
Frame
Size
Mounting
Bolt
Circle
CWB-098, 101,
121, 131
247⁄8
(632)
281⁄4
(718)
193⁄4
(502)
121⁄2
(318)
12
(305)
14
(356)
167⁄8
(429)
CWB-141, 161 287⁄8
(733)
293⁄4
(756)
221⁄8
(562)
151⁄2
(394)
15
(381)
17
(432)
193⁄8
(492)
CWB-180, 200 353⁄8
(899)
285⁄8
(727)
273⁄4
(705)
171⁄2
(445)
17
(432)
19
(483)
25
(635)
CWB-220, 240 4225⁄32
(1087)
337⁄8
(860)
311⁄4
(794)
201⁄2
(521)
20
(508)
22
(559)
283⁄8
(721)
CWB-300 50
(1270)
36
(914)
383⁄8
(975)
251⁄2
(648)
25
(635)
27
(686)
3527⁄32
(910)
All dimensions in inches (millimeters). *NOTE: 2 inches minimum, 8 inches when
motorized option is required. **May vary depending on motor size.
Dimensional Data
Inspection and Maintenance During
Storage
While in storage, inspect fans once per month. Keep a
record of inspection and maintenance performed.
If moisture or dirt accumulations are found on parts,
the source should be located and eliminated. At
each inspection, rotate the wheel by hand ten to
fifteen revolutions to distribute lubricant in motor and
bearings. If paint deterioration begins, consideration
should be given to touch-up or repainting. Fans with
special coatings may require special techniques for
touch-up or repair.
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.
Removing from Storage
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.
Centrifugal Sidewall Exhaust4®
Installation
These fans exhaust directly away from the building,
therefore their location and placement should be
analyzed. Proximity to nearby buildings and people
must be considered.
Access to the motor compartment is accomplished
by removing the screws from the cover. The cover can
then be removed and placed on a flat surface in an
area protected from strong winds.
The motor’s amperage and voltage rating must be
checked for compatibility to the supply voltage prior
to final electrical connection. For commercial kitchen
applications, the electrical supply must enter the
motor compartment through the breather tube. For
other non-flammable applications the electrical supply
can be routed through the conduit chase between
the mounting plate and the bottom of the motor
compartment. Consult local code authorities for your
specific requirements.
Typical Wall Mounting Installation
1. Remove mounting plate from unit by removing
the fasteners marked by (1). Remove motor
compartment cover by removing fasteners marked
by (2). Reference Figure 1.
3. Once the mounting plate has been attached to
the wall, the unit can be installed. The unit should
be aligned with the breather tube (7) pointing
down. The electrical chase should be guided
through the hole in the motor compartment. The
horizontal support channels (8) should slide over
the mounting angle clips (10) on the mounting
plate until the holes in the windband and clips are
aligned. Replace fasteners (9) and tighten. Wiring
now can be done. Consult local code authorities
for your specific requirements. Reference Figure 3.
2. Locate the mounting plate (3) at the desired
position and check to avoid unit clearance
problems. Cut the wall opening (4) as shown based
upon dimensions obtained from the Dimensional
Data section found on page 2. Locate top of
mounting plate (decal) and attach to the wall
construction. The fasteners must pass through the
holes provided in the mounting angle clips (5) on
the mounting plate (3). For uneven surfaces, shims
may be required. Sealant or caulking should be
applied in the groove (6) formed by the mounting
plate and the wall to prevent moisture leakage into
the building. Reference Figure 2.
4. During shipping, wheel position may shift.
Alignment should be as shown above (centered
in the inlet) and can be accomplished by
loosening the fasteners (11) located in the motor
compartment. For belt drive units, additional
vertical alignment can be accomplished by
loosening the four fasteners on the drive frame
support angles and the two fasteners that hold the
L-brackets to the support angles on top (13). Also,
horizontal alignment can be made by loosening the
bearings from the bearing plate.
Removal of the entire power pack (motor, drives
and wheel) for maintenance or cleaning can be
accomplished by removing the breather tube (12)
and fasteners (11). Reference Figure 4.
12
3
12
Figure 1
DETAIL
Decal
TOP
Caulking
6
3
5
6
4
Figure 2
9
8
97
Electrical
Wiring
10
Figure 3
CW/CWB Models
Sizes 098-300
CW Models
Sizes 060-095
11
12
13
13
Figure 4
Centrifugal Sidewall Exhaust 5
®
Commercial Kitchen Installation
UL/cUL 762 Listed fans are for commercial kitchen
installations. CW fans with A, B and C motor RPMs
and all CWB fans are the only fans approved for
this type of installation. All must include the model
suffix“G”.
For commercial kitchen installations, the electrical
supply must enter the motor compartment through
the breather tube of the fan. In addition, the maximum
operating temperature at the fan must not exceed
400°F (204°C).
Commercial kitchen installations must also comply
with NFPA 96. Check local and national codes for
these installations, and consult local code authorities
for other specific requirements.
Mounting for Severe Duty Installations
Location A
Mounting Plate
Mounting Plate
Mounting Plate
Concrete Anchoring
Steel Anchoring
Timber Anchoring
2500 Min. PSI
Concrete
4 in. (102 mm) Min.
Wall Thickness
when using
Concrete Anchors
1/2 in. (13 mm) S.S. Hilti Kwik Bolt TZ
Expansion Anchors
Minimum 2 in. (51 mm) Engagement
See Table for Quantity
(4 in. min. (102 mm) Edge Distance)
Structural Steel
1/8 in. (3 mm) Thick
or 12 ga. minimum
5/16 in. - 14 Self-Drilling Screw
Min. 1/2 in. (13 mm) of Threads Through
See Table for Quantity
(0.625 in. min. (1.6 mm) Edge Distance)
Wood Timber
Min. 4 in. (102 mm)
Nominal Thickness
Min. G = 0.42
G = specific gravity
of lumber
1/2 in. (13 mm) Lag Bolt (Zinc Plated)
Min. 3 in. (76 mm) Thread Engagement
(2 in. min. (51 mm) Edge Distance)
High Wind and Seismic Mounting - Location A
Fan Size Total Fasteners
060 - 161 16
180 - 300 24
IMPORTANT
Only qualified installers should perform this work.
Manufacturer assumes no liability for damages
resulting from installation.
Installation instructions for seismic ratings are only
recommendations. Final design must be determined
by Structural Engineer of Record (SEOR) including
requirements for installation of mounting plate to
structure.
Welded Duct
by Others
Mounting
Bolt Hole
Circle
Wall
External Wiring
Liquid Tight
Flexible Conduit
by Others
Recommended
Wall Opening
For severe duty installations, secure the mounting
plate to the wall using the correct number and type of
fasteners shown in the table and drawings.
Centrifugal Sidewall Exhaust6®
Model CWB Pre-Starting Belt Tension Checks
6. Always loosen tension enough to install belts
without stretching, see Figure 7.
Do not force belt(s). Forcing the belts will break the
cords and cause belt failure.
7. For units with two groove pulleys, adjust so the
tension is equal in both belts.
8. 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 8.
Figure 7
CORRECT WRONG WRONG WRONG
Figure 8
1. Check all fasteners and setscrews for tightness.
The wheel should rotate freely and be aligned as
shown in Figure 5.
2. Wheel position is preset and the unit is test run at
the factory. Movement may occur during shipment
and realignment may be necessary. Refer to steps
3 and 4.
3 Only CWB model - 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. For both CW and
CWB models with wheel hubs and shaft pulleys
utilizing a tapered bushing interface, reference
page 9 for the tapered bushing removal and move
the wheel to the desired position.
Fan RPM should be checked and verified with a
tachometer.
5. Check wheel rotation (viewing from the shaft
side) by momentarily energizing the unit. Rotation
should be clockwise and correspond to the
rotation decal on the unit, see Figure 6.
If wheel rotation is incorrect,
reverse two of the wiring
leads or check motor wiring
for single phase.
All CW and CWB models
have clockwise rotation
when viewed from top
of fan.
Pre-Starting Checks WARNING
Correct direction of wheel rotation is critical.
Reversed rotation will result in poor air performance,
motor overloading and possible motor burnout.
AVERTISSEMENT
La turbine doit impérativement tourner dans le bon
sens. Une rotation en sens inverse entraînerait
de mauvaises performances de soufflage, une
surcharge du moteur voire un grillage du moteur.
DANGER
Disconnect and secure to the “off” position all
electrical power to the fan prior to inspection
or servicing. Failure to comply with this safety
precaution could result in serious injury or death.
DANGER
Pour écarter les risques de blessure grave ou
de mort, débrancher et verrouiller l’alimentation
électrique en position « Arrêt » avant tout contrôle
ou entretien.
Fan Size Overlap
in. (mm)
Gap
in. (mm)
060-095 – 3/32 (2)
098-161 1/4 (6) –
180-300 1/2 (13) –
Overlap
Gap
Figure 5
9. Belt tension can be adjusted by loosening four
fasteners on the drive frame, see Figure 9. The
motor plate slides on the slotted adjusting arms
and drive frame angles in
the same manner.
Four (4) fasteners
in total.
Identical fasteners on
opposing side must
also be loosened.
Figure 9
Clockwise Rotation
Figure 6
Centrifugal Sidewall Exhaust 7
®
Operation
1. Before starting up or operating fan, check all
fasteners for tightness. In particular, check the set
screws in the wheel hub (or the tapered bushing
and pulleys if applicable).
2. While in the OFF position or before connecting the
fan to power, turn the fan wheel by hand to be sure
it is not striking the venturi or any obstacle.
3. Start the fan and shut it off immediately to check
rotation of the wheel with directional arrow in the
motor compartment, see Figure 6.
4. When the fan is started, observe the operation and
check for any unusual noises.
5. With the system in full operation and all ductwork
attached, measure current input to the motor and
compare with the nameplate rating to determine if
the motor is operating under safe load conditions.
6. Keep inlets and approaches to fan clean and free
from obstruction.
IMPORTANT
Adjust (tighten) belt tension after the first
24-48hours of operation.
Inspection
Inspection of the fan should be conducted at the
first 30 minute and 24 hour intervals of satisfactory
operation.
30 Minute Interval
Inspect bolts, setscrews and motor mounting bolts.
Adjust and tighten as necessary.
24 Hour Interval
Check all internal components. On CWB unit only,
inspect belt alignment and tension. Adjust and tighten
as necessary.
11. The adjustable motor pulley is factory set for
the RPM specified. Speed can be increased by
closing or decreased by opening the adjustable
motor pulley. Two groove variable pitch pulleys
must be adjusted an equal number of turns open.
12. Any increase in speed represents a substantial
increase in the horsepower required by the unit.
13. Motor amperage should always be checked to
avoid serious damage to the motor when speed
is varied.
IMPORTANT
Over tightening belts will cause excessive bearing
wear and noise. Too little tension will cause slippage
at startup and uneven wear.
IMPORTANT
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.
10. Sizes 099-161: Belts should be tensioned just
enough to prevent slippage at full load. Belts
should have a slight bow on the slack side while
running at full load; see Figure 10a.
Sizes 180-300: 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 10b.
Slack
Side
Belt
Span
Deflection = Belt Span
64
Figure 10a Figure 10b
Centrifugal Sidewall Exhaust8®
Maintenance
DANGER
Disconnect and secure to the “off” position all
electrical power to the fan prior to inspection
or servicing. Failure to comply with this safety
precaution could result in serious injury or death.
DANGER
Pour écarter les risques de blessure grave ou
de mort, débrancher et verrouiller l’alimentation
électrique en position « Arrêt » avant tout contrôle
ou entretien.
IMPORTANT
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).
AVERTISSEMENT
L’appareil doit être rendu non opérationnel lors
du nettoyage de la turbine ou du caisson (fusibles
retirés, sectionneur verrouillé).
Maintenance for CWB Model
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.
2. Matched belts should always be used on units
with multi-groove pulleys.
3. For belt replacement, loosen the tensioning
device enough to allow removal of the belt by
hand. Do not force the belts on or off. This may
cause cords to break, leading to premature
failure.
4. Once installed, adjust belts as shown in
“Pre-Starting Checks”.
5. To ensure tightness, check pulley setscrews.
Proper keys must be in keyways.
6. Fan RPM should not be readjusted. Only use
pulleys of identical size and type when replacing
pulleys.
7. Shaft bearings can be classified in two
groups, relubricating and non-relubricating. All
non-relubricating bearings on model CWB fans
are factory lubricated and require no further
lubrication under normal use; between -20°
to 180°F (-29° to 82°C) in a relatively clean
environment.
8. On CWB belt driven fans, the cast pillow block
bearings are factory lubricated and are provided
with external grease fittings. Annual lubrication
is recommended or more frequently if needed
(see Table 2 on page 9). Do not over-grease. Use
only one or two shots of lubricant with a hand
gun. Maximum hand gun rating is 40 psi. Rotate
bearings during lubrication where good safety
practice permits. Caution should be employed to
prevent over packing or contamination.
9. 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 over packing or
contamination.
10. Grease fittings should be wiped clean. The unit
should be in operation while lubricating bearings.
Extreme care should be used around moving
parts.
11. Grease should be pumped in very slowly until a
slight bead forms around the seal. A high grade
lithium base grease should be used.
12. During the first few months of operation, check
bearing set screws periodically to ensure
tightness.
13. When installing fans for restaurant exhaust
applications, follow NFPA 96 for cleaning fans.
14. If unit is to be left idle for an extended period,
remove belts and store in a cool, dry place to
avoid premature belt failure.
Installation and maintenance are to be performed
only by qualified personnel who are familiar with local
codes and regulations and who are experienced with
this type of equipment.
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 horsepower motors are
permanently lubricated and should not be lubricated
after installation. 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 2,000 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.
Centrifugal Sidewall Exhaust 9
®
Tapered Bushing Hub Installation
and Removal
For wheel hubs and shaft pulleys utilizing a tapered
bushing interface, follow this procedure for installation
and removal. There are two possible set ups for the
tapered bushing, both have the same procedure, but
orientation of the hub varies.
Tapered Bushing Removal:
1. If present, loosen the setscrew holding the bushing
and shaft key in place.
2. Loosen and remove the socket head cap screws
which fasten the bushing to the hub as shown in
the section views and examples of Figures 11-14.
3. Standard Mounting - Take the two socket head
cap screws that were removed and install them
into the visibly threaded holes on the wheel hub.
Reverse Mounting - Install the two socket head
cap screws into the visibly threaded holes of the
bushing flange.
4. Once both socket head cap screws are installed,
tighten them an eighth of a turn at a time,
alternating between the two until the hub comes
loose from the bushing.
Bushing Installation:
1. Clean all surfaces of hub and bushing to remove
any oil or residue present and do not use any
lubricant to install bushing into the hub. For both
standard and reverse mounting styles, the socket
head cap screws are adjustable from the inlet of
the fan.
2. Standard Mounting: Slide the bushing and shaft
key onto the fan shaft followed by the wheel and
hub assembly. If present, use the keyway setscrew
to hold the shaft key and bushing in place but DO
NOT overtighten as this can damage the bushing.
Align the unthreaded holes of the hub with the
threaded holes of the tapered bushing.
Reverse Mounting: Slide the wheel and hub
assembly onto the fan shaft followed by the
bushing and shaft key. If present, use the keyway
setscrew to hold the shaft key and bushing in place
but DO NOT overtighten as this can damage the
bushing. Align the unthreaded holes of the tapered
bushing with the threaded holes of the hub.
3. Install the two bushing socket head cap screws
into the aligned holes by hand (or without
excessive torque) until the heads of the socket
head cap screws are seated against the mating
surface.
4. Adjust the height of the wheel in the fan relative
to the inlet venturi then tighten the two socket
head cap screws an eighth turn at a time in an
alternating fashion and to a torque of 10 ft-lbs.
Standard Mounting Reverse Mounting
Figure 13
Standard Bushing Orientation
Figure 14
Reverse Bushing Orientation
Figure 11 Figure 12
Bushing
Washers
Cap Screws
Hub
Bushing
Washers
Cap Screws
Hub
Centrifugal Sidewall Exhaust10 ®
Parts List
CAUTION
A fan manufactured with an explosion resistant
motor does not certify the entire unit to be explosion
proof. Refer to ULListing Mark for the fans
approved usage.
CAUTION
La présence d’un moteur antidéflagrant sur un
ventilateur ne garantit pas que tout l’appareil est
antidéflagrant. Pour connaître les emplois autorisés
de l’appareil, voir son marquage de conformité UL.
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.
Table 3: Grease Manufacturers
Manufacturer Grease (NLGI #2)
U.S. Electric Motors Grease No. 83343
Chevron U.S.A. Inc Chevron SRI Grease #2
Mobil Oil Corporation Mobilith
Mobil 532
Texaco, Inc. Premium BRB #2
Texaco Multifak #2
Amoco Oil Co. Rykon Premium #2
Exxon Unirex N2
Shell B Shell Alvania #2
Table 2: Suggested Fan Bearing Lubrication Intervals
Interval
(months) Type of Service
1 to 3 Heavy duty in dirty, dusty locations; high ambient
temperatures; moisture laden atmosphere; vibration.
3 to 6 12 to 24 hours per day, heavy duty, or if moisture is
present
6 to 12 8 to 16 hours per day in clean, relatively dry
atmosphere
12 to 18 Infrequent operation or light duty in clean atmosphere
Recommended Bearing Lubrication
Frequency in Months
If unusual environment conditions exist, such as
extreme temperature, moisture or contaminants, more
frequent lubrication is required.
A good quality lithium base grease, conforming to
NLGIGrade 2 consistency, such as those listed in
Table 3.
CWB Belt Drive
Mounting
Plate
Windband Birdscreen
Breather Tube
Motor
Compartment
Motor
Wheel Motor Cover
CW Direct Drive
Mounting
Plate
Windband Birdscreen
Breather Tube
Motor
Compartment
Motor
Wheel Motor Cover
Centrifugal Sidewall Exhaust 11
®
PROBLEM CAUSE CORRECTIVE ACTION
Excessive
noise or
vibration
Bad bearings Replace.
Wheel unbalance Clean and remove all dirt buildup off wheel. Check wheel
balance, rebalance in place if necessary.
Belts too tight or too loose Adjust tension, see Figures 10a and 10b.
Wheel improperly aligned and
rubbing Center wheel on inlet, see Figure 5.
Loose drive or motor pulleys Align and tighten. See Pre-Starting Checks on pages 6 and 7.
Foreign objects in wheel or
housing Remove objects, check for damage or unbalance.
Reduced
airflow
System resistance too high Check system: Proper operation of backdraft or control
dampers, obstruction in ductwork, clean dirty filters.
Unit running backwards Correct as shown in Pre-Starting Checks, #5, Figure 6.
Excessive dirt buildup on
wheels Clean wheel.
Improper wheel alignment Center wheel on inlets, see Pre-Starting Checks, Figure 5.
WARNING
Before taking any corrective action, make certain
unit is not capable of operation during repairs.
AVERTISSEMENT
Avant d’entreprendre toute action corrective,
s’assurer que l’appareil ne pourra pas fonctionner
durant les réparations.
Troubleshooting
457691 • CW and CWB, Rev. 8, July 2017 Copyright 2017 © Greenheck Fan Corporation12
As a result of our commitment to continuous improvement, Greenheck reserves the right to change specifications
without notice.
Specific Greenheck product warranties are located on greenheck.com within the product area tabs and in the
Library under Warranties.
Greenheck’s Centrifugal Upblast and Sidewall Exhaust
catalog provides additional information describing the
equipment, fan performance, available accessories, and
specification data.
®
Phone: 715.359.6171 • Fax: 715.355.2399 • Parts: 800.355.5354 • E-mail: gfcinfo@greenheck.com • Website: www.greenheck.com
Our Commitment
AMCA Publication 410-96, Safety Practices for Users and
Installers of Industrial and Commercial Fans, provides
additional safety information. This publication can be
obtained from AMCA International, Inc. at www.amca.org.
