Greenheck Fan Ventilation Hood CW CWB User Manual

PN 457691  
Models CW/CWB  
Centrifugal Sidewall 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!  
Model CW  
Model CWB  
Belt Drive  
Model CWB is a belt drive centrifugal  
sidewall exhaust fan. These fans are  
Direct Drive  
Model  
CW  
is  
a
direct  
drive  
fan.  
centrifugal  
sidewall  
exhaust  
specifically designed for wall mounted  
These fans are specifically designed  
for wall mounted application.  
application. Performance capabilities  
range up to 12,500 cfm (21,200 m3/hr)  
Performance capabilities range up to  
6,400 cfm (10,874 m3/hr) and up to  
and up to 2.75 in. wg (685 Pa) of static  
pressure. The maximum continuous  
3 in. wg (747 Pa) of static pressure.  
operatingtemperatureis400°F(204.4°C).  
The maximum continuous operating  
CWB fans are available in nineteen sizes with nominal  
wheel diameter ranging from 9 to 30 inches (229 to  
762 mm) (098 - 300 unit sizes). Each fan shall bear  
a permanently affixed manufacturer’s engraved  
metal nameplate containing the model number and  
individual serial number.  
temperature for fan sizes 098-200 is 400°F (204°C)  
and for fan sizes 060-095 is 160°F (71°C). CW fans  
are available in fourteen sizes with nominal wheel  
diameter ranging from 9 to 20 inches (229 mm to  
508 mm) (060 - 200 unit sizes). 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 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.  
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.  
CAUTION  
When servicing the fan, motor may be hot enough to  
cause pain or injury. Allow motor to cool before servicing.  
6. Verify that the power source is compatible with the  
equipment.  
CAUTION  
Precaution should be taken in explosive atmospheres.  
7. Never open access doors to a duct while the fan is  
running.  
Model CW/CWB • Centrifugal Sidewall Exhaust Fans  
 
1
(wide temperature swings may cause condensation  
and “sweating” of metal parts). All accessories must be  
stored indoors in a clean, dry atmosphere.  
in a similar fashion until the fan equipment goes into  
operation.  
Installation  
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.  
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 unit should be stored at least 3½ in. (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.  
The motor’s amperage and voltage rating must be  
checked for compatibility to the supply voltage prior  
to final electrical connection. For NFPA Restaurant  
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 requrements. UL/cUL 762 Installations are for  
Restaurant Applications.  
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.  
All CWB fans and CW fans with A, B and C motor RPMs  
are the only fans approved for this installation. All must  
include the suffix “G”.  
All fans must be installed per NFPA 96 and meet all  
local code requirements. In addition, the maximum  
operating temperature at the fan must not exceed  
375°F (191°C).  
Do not cover parts with plastic film or tarps as these  
cause condensation of moisture from the air passing  
through heating and cooling cycles.  
Typical Wall Mounting Installation  
1. Remove mounting plate from unit by removing the  
fasteners shown above marked by (1). Remove  
motor compartment cover by removing fasteners  
marked by (2).  
Fan wheels should be blocked to prevent spinning  
caused by strong winds.  
Inspection and Maintenance During  
Storage  
While in storage, inspect fans once per month. Keep a  
record of inspection and maintenance performed.  
1
2
3
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 on motor. 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.  
2
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  
1
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. 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.  
®
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  
Model CW/CWB • Centrifugal Sidewall Exhaust Fans  
 
3
®
Pre-Starting Checks  
6
DECAL  
1. Check all fasteners and setscrews for tightness.  
The wheel should rotate freely and be aligned as  
shown in figure 7.  
Caulking  
TOP  
DETAIL  
3
2. Wheel position is preset and the unit is test run at  
the factory. Movement may occur during shipment  
and realignment may be necessary.  
5
Wheel Overlap and Gap Dimensions  
DETAIL  
Model  
G - Overlap in (mm)  
H - Gap in (mm)  
4
060-095  
098-161  
180-300  
3/32 (2)  
6
1/4 (6)  
1/2 (13)  
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.  
G
H
Figure 7  
3. Only CW unit - Centering height alignment can  
be accomplished by loosening the set screws in  
the wheel and moving the wheel to the desired  
position.  
9
10  
4. Only CWB unit - Centering can be accomplished by  
loosening the bolts holding the drive frame to the  
shock mounts and repositioning the drive frame.  
ELECTRICAL  
WIRING  
5. Only CWB unit - Wheel and inlet cone overlap  
can be adjusted by loosening the setscrews in  
the wheel and moving the wheel to the desired  
position.  
8
7
9
6. Only CWB unit - Fan RPM should be checked and  
verified with a tachometer.  
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 2 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).  
7. 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 8. If wheel rotation is  
incorrect reverse two of the wiring leads or check  
motor wiring for single phase.  
Wheel Rotation  
All CW and CWB models  
have clockwise rotation  
when viewed from top  
of fan  
CW/CWB Models 098 - 300  
13  
11  
Clockwise  
Airflow  
Figure 8  
CW Models 060-095  
13  
12  
4
Model CW/CWB • Centrifugal Sidewall Exhaust Fans  
 
®
WARNING  
WARNING  
Correct direction of wheel rotation is critical.  
Reversed rotation will result in poor air  
performance, motor overloading and possible  
burnout.  
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.  
IMPORTANT  
Model CWB  
Pre-Starting Belt Tension Checks  
8. Always loosen tension enough to install belts  
without stretching, see figure 9.  
Over tightening will cause excessive bearing wear  
and noise. Too little tension will cause slippage at  
startup and uneven wear.  
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 12b).  
Belts  
Deflection  
Do not force belt(s). Forcing the  
belt(s) will break the cords and  
cause belt failure  
Figure 9  
Slack  
Side  
9. For units with two groove pulleys, adjust so the  
tension is equal in both belts.  
Figure 12a  
Figure 12b  
10. 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 10.  
13. 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 or closed.  
14. Any increase in speed represents a substantial  
increase in the horsepower required by the unit.  
15. Motor amperage should always be checked to avoid  
serious damage to the motor when speed is varied.  
Operation: CW/CWB  
1. Before starting up or operating fan, check all  
fasteners for tightness. In particular, check the  
setscrews in wheel hub (and pulleys, if applicable).  
Figure 10  
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.  
11. For CWB units: Belt tension can be adjusted by  
loosening four fasteners on the drive frame, see  
figure 11. The motor plate slides on the slotted  
adjusting arms and drive frame angles in the same  
manner.  
3. Start the fan and shut it off immediately to check  
rotation of the wheel with directional arrow in the  
motor compartment, see figure 8.  
4. When the fan is started, observe the operation and  
check for any unusual noises.  
Fasteners  
(4) *Fasteners  
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.  
*Identical fasteners on  
opposing side must also  
be loosened.  
6. Keep inlets and approaches to fan clean and free  
from obstruction.  
Figure 11  
12a. Sizes 071-161: 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 12a).  
12b. Sizes 180-540: 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  
Model CW/CWB • Centrifugal Sidewall Exhaust Fans  
 
5
®
Inspection: CW/CWB  
WARNING  
Inspection of the fan should be conducted at the  
first 30 minute and 24 hour intervals of satisfactory  
operation.  
Always disconnect, lock and tag power source before  
servicing. Failure to disconnect power source can  
result in fire, shock or serious injury.  
30 Minute Interval  
Inspect bolts, setscrews and motor mounting bolts.  
Adjust and tighten as necessary.  
CAUTION  
Uneven cleaning of the wheel will produce an out of  
balance condition that will cause vibration in the fan.  
24 Hour Interval  
Check all internal components. On CWB unit only,  
inspect belt alignment and tension. Adjust and tighten  
as necessary.  
WARNING  
This unit should be made non-functional when  
cleaning the wheel or housing (fuses removed,  
disconnect locked off).  
IMPORTANT  
4. Once installed, adjust belts as shown in  
“Pre-Starting Checks.”  
Adjust (tighten) belt tension after the first 24-48 hours  
of operation.  
5. Shaft bearings can be classified in two  
groups:relubricating and non-relubricating. All  
non-relubricating bearings on standard model  
CWB fans are factory lubricated and require no  
further lubrication under normal use (between  
-20º to 180ºF (-29º to 82ºC) in a relatively clean  
environment).  
Maintenance: CW/CWB  
A proper maintenance program will help these units  
deliver years of dependable service. 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.  
6. Units installed in hot, humid or dirty locations  
should be equipped with special bearings. These  
bearings will require frequent lubrication. On CWB  
belt driven fans, the standard 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. 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.  
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.  
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 should be used.  
9. When installing restaurant exhaust applications  
follow NFPA 70 for cleaning fans.  
10. Grease containers must be emptied at regular  
intervals to prevent overflow.  
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.  
11. To ensure tightness, check pulley setscrews. Proper  
keys must be in keyways.  
Belt/Bearing Maintenance CWB Unit  
12. Fan RPM should not be readjusted. Only use  
pulleys of identical size and type when replacing  
pulleys.  
13. During the first few months of operation check  
bearing set screws periodically to ensure tightness.  
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.  
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.  
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.  
6
Model CW/CWB • Centrifugal Sidewall Exhaust Fans  
 
®
Recommended Relubrication  
Frequency in Months  
Table 3: Grease Manufacturers  
Manufacturer  
Grease (NLGI #2)  
U.S. Electric Motors  
Chevron U.S.A. Inc  
Grease No. 83343  
Chevron SRI Grease #2  
Mobilith  
NOTE: If unusual environment conditions exist  
(extreme temperature, moisture or contaminants) more  
frequent lubrication is required.  
Mobil Oil Corporation  
Texaco, Inc.  
A good quality lithium base grease, conforming to  
NLGI Grade 2 consistency, such as those listed here  
may be used.  
Mobil 532  
Premium BRB #2  
Texaco Multifak #2  
Rykon Premium #2  
Unirex N2  
Amoco Oil Co.  
Exxon  
Table 2: Suggested Fan Bearing Greasing Intervals  
Interval  
Shell  
B Shell Alvania #2  
Type of Service  
(months)  
Heavy duty in dirty, dusty locations; high ambient  
temperatures; moisture laden atmosphere;  
vibration.  
1 to 3  
12 to 24 hours per day, heavy duty, or if moisture  
is present  
3 to 6  
6 to 12  
12 to 18  
8 to 16 hours per day in clean, relatively dry  
atmosphere  
Infrequent operation or light duty in clean  
atmosphere  
Parts List  
NOTE  
Each fan bears a manufacturer’s nameplate with model number and serial number embossed. This information will as-  
sist 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.  
CW Direct Drive Centrifugal Sidewall Exhaust Fan  
Windband  
Birdscreen  
Motor Compartment  
Mounting Plate  
Wheel  
Cover  
Breather Tube  
Model CW/CWB • Centrifugal Sidewall Exhaust Fans  
 
7
®
CWB Belt Drive Centrifugal Sidewall Exhaust Fan  
Windband  
Birdscreen  
Motor Compartment  
Mounting Plate  
Wheel  
Cover  
Breather Tube  
Troubleshooting  
WARNING: Before taking any corrective action, make certain unit is not capable of operation during repairs.  
PROBLEM  
CAUSE  
Bad Bearings  
CORRECTIVE ACTION  
Replace.  
Clean and remove all dirt buildup off wheel. Check wheel  
balance, rebalance in place if necessary.  
Wheel unbalance  
Belts too tight or too loose  
Adjust tension, see figure 12a-b.  
Excessive Noise  
or Vibration  
Wheel improperly aligned and  
rubbing  
Center wheel on inlet, see figure 7.  
Loose drive or motor pulleys  
Align and tighten. See “Pre-Starting Checks”, see page 4-6.  
Remove objects, check for damage or unbalance.  
Foreign objects in wheel or  
housing  
Check system: Proper operation of backdraft or control  
dampers, obstruction in ductwork, clean dirty filters.  
System resistance too high  
Unit running backwards  
Correct as shown in figure 8.  
Reduced airflow  
Excessive dirt buildup on wheels Clean wheel.  
Improper wheel alignment Center wheel on inlets, see Pre-Starting checks and figure 7.  
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.  
Greenheck Catalog Series C provides additional information describing the  
equipment, fan performance, available accessories, and specification data.  
AMCA Publication 410-96, Safety Practices for Users and Installers of Industrial  
and Commercial Fans, provides additional safety information. This publication  
®
Phone: (715) 359-6171 • Fax: (715) 355-2399 • E-mail: [email protected]Website: www.greenheck.com  
8
457691 • Models CW/CWB, Rev. 5, September 2008  
Copyright 2008 © Greenheck Fan Corp  
 

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