Acer Gas Grill 471558 User Manual

PN 471558  
®
Downblast Centrifugal Roof Exhaust Fans  
Installation, Operation and Maintenance Manual  
Please read and save these instructions. 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! Retain instructions for future reference.  
Model G  
Model GB  
Belt Drive  
Direct Drive  
Model G is a direct drive downblast  
GB Model Fans are belt drive  
downblast centrifugal exhaust fans.  
centrifugal exhaust fan. These  
fans are specifically designed  
These fans are specifically designed  
for roof mounted applications  
for roof mounted applications  
exhausting relatively clean air.  
exhausting relatively clean air.  
Performance capabilities range  
Performance capabilities range up  
up to 4,300 cfm (7,305 m3/hr) and  
to 44,700 cfm (75,950 m3/hr) and  
up to 1 in. wg (249 Pa) of static  
up to 2.5 in. wg (623 Pa) of static  
pressure. The maximum continuous  
pressure. The maximum continuous  
operating temperature is 180°F  
operating temperature is 180°F  
(82ºC). G models are available  
(82ºC). GB models are available in  
in 27 sizes with nominal wheel  
twenty sizes with nominal wheel  
diameter ranging from 8 to 24 inches (203 to 610 mm)  
(060 - 243 unit sizes). Each fan shall bear a permanently  
affixed manufacturer’s engraved metal nameplate  
containing the model number and individual serial  
number. All fans are UL/cUL listed Standard 705.  
diameters ranging from 11 to 54 inches (279 to 1372 mm)  
(071-540 unit sizes). Each fan shall bear a permanently  
affixed manufacturer’s nameplate containing the model  
number and individual serial number. All fans are  
UL/cUL listed Standard 705.  
General Safety Information  
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.  
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.  
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.  
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.  
7. Never open access doors to a duct while the fan  
is running.  
CAUTION  
Precaution should be taken in explosive atmospheres.  
Model G/GB Centrifugal Roof Exhaust Fans  
 
1
Inspection and Maintenance  
During Storage  
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. The  
manufacturer will not be responsible for damage during  
storage. These suggestions are provided solely as a  
convenience to the user.  
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 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.  
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 (-1° to 43°C)  
(wide temperature swings may cause condensation  
and “sweating” of metal parts). All accessories must be  
stored indoors in a clean, dry atmosphere.  
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.  
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.  
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.  
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.  
Model G/GB Centrifugal Roof Exhaust Fans  
 
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Installation  
WARNING  
Typical Roof Mounting Installation  
Installation, troubleshooting and parts replacement is  
to be performed only by qualified personnel.  
1. On the roof surface, cut an appropriate sized hole  
and follow manufacturer’s instructions on curb  
installation. Caulk and flash the curb to ensure a  
water tight seal.  
WARNING  
Disconnect power before installing or servicing.  
CAUTION  
2. If unit is equipped with a backdraft damper, it should  
be installed now.  
3. Remove motor cover. Access to the motor  
compartment is accomplished by removing the  
screws as shown in Figure 3.  
A fan manufactured with an explosion resistant motor  
does not certify the entire unit to be explosion proof.  
4. Only on GB Belt Drive fans. On the drive frame use  
the lifting lugs to lift and place the unit on top of roof  
curb. (Refer to Figure 2 on page 2).  
5. Secure fan to curb using a minimum of eight lag  
screws, metal screws or the suitable fasteners.  
Shims may be required depending upon curb  
installation and roofing material.  
Note: Severe duty applications may require  
additional fasteners.  
6. Verify power line wiring is de-energized before  
connecting fan motor to power source.  
7. Connect power supply wiring to the motor as  
indicated on the motor nameplate or terminal box  
cover. Check the power source for compatibility with  
the requirements of your equipment.  
8. Check fan wheel for free rotation, re-center  
if necessary.  
9. Check all fasteners for tightness.  
10. Mount and wire safety disconnect switch under  
motor cover. Wire control switches at ground level,  
refer to Figure 4.  
11. Replace motor cover.  
Typical Wiring Diagram  
MOTOR  
MOTOR  
SUPPLY VOLTAGE  
115/208-230/60/1  
SUPPLY VOLTAGE  
208-230/460/60/3  
J-BOX  
J-BOX  
L1  
L2  
L3  
L1  
L2  
Figure 4  
Vari-Green Wiring  
For Vari-Green wiring refer to the Vari-Green  
Motor IOM PN 473681 for complete wiring and  
operation instructions.  
Model G/GB Centrifugal Roof Exhaust Fans  
 
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G - Direct Drive  
G Direct Drive  
Figure 5 - Typical Roof Mounting Installation  
Curb  
Roof  
Opening  
*Approx.  
Weight  
Model  
Damper  
Cap  
G 060, 065, 070, 075  
G 080, 085, 090, 095  
G 97, 98, 99  
17 (432)  
8 (203)  
10½ (267)  
18 (8)  
26 (12)  
57 (26)  
62 (28)  
65 (30)  
66 (30)  
76 (35)  
80 (36)  
Disconnect  
17 (432)  
19 (483)  
19 (483)  
19 (483)  
19 (483)  
22 (559)  
22 (559)  
30 (762)  
30 (762)  
10 (254) 12½ (267)  
12 (305) 14½ (368)  
12 (305) 14½ (368)  
12 (305) 14½ (368)  
12 (305) 14½ (368)  
16 (406) 18½ (470)  
16 (406) 18½ (470)  
Screws  
G 103, 103 HP  
G 123  
G 133  
G 143, 143 HP  
G 163, 163 HP  
G 183, 183 HP  
G 203, 203 HP  
¾ in.  
8 or 12 in.  
(203 or 305)  
(19)  
Wiring by Others  
18 (457) 20½ (521) 119 (54)  
18 (457) 20½ (521)  
24 (610) 26½ (673)  
130 (59)  
150 (68)  
Damper  
Recommended Duct  
and Damper Size  
G 223/243, 223/243 HP 34 (864)  
1¼ in.  
(32)  
1¼ in.  
(32)  
*Dimensions shown  
in inches (mm)  
Recommended Roof  
Opening  
GB - Belt Drive  
Curb  
Roof  
Damper  
*Approx.  
Weight  
Model  
Cap  
Opening  
GB 071, 081, 091  
GB 101, 101HP  
GB 121  
19 (483)  
19 (483)  
19 (483)  
19 (483)  
22 (559)  
22 (559)  
30 (762)  
30 (762)  
12 (305) 14½ (368)  
12 (305) 14½ (368)  
12 (305) 14½ (368)  
12 (305) 14½ (368)  
16 (406) 18½ (470)  
16 (406) 18½ (470)  
58 (26)  
63 (29)  
66 (30)  
67 (30)  
83 (38)  
89 (40)  
GB Belt Drive  
Figure 6 - Typical Roof Mounting Installation  
GB 131  
GB 141, 141HP  
GB 161, 161HP  
GB 180, 180HP  
GB 200, 200HP  
Disconnect  
18 (457) 20½ (521) 125 (57)  
18 (457) 20½ (521) 138 (63)  
GB 220, 220HP,  
240, 240HP  
34 (864)  
24 (610) 26½ (673) 158 (72)  
GB 260  
40 (1016) 30 (762) 32½ (826) 305 (138)  
40 (1016) 30 (762) 32½ (826) 320 (145)  
46 (1168) 36 (914) 38½ (978) 385 (175)  
46 (1168) 36 (914) 38½ (978) 403 (183)  
52 (1321) 42 (1067) 44½ (1130) 495 (225)  
52 (1321) 48 (1219) 50½ (1283) 623 (283)  
64 (1626) 54 (1372) 56½ (1435) 687 (312)  
64 (1626) 54 (1372) 56½ (1435) 748 (339)  
¾ in.  
8 or 12 in.  
(203 or 305)  
(19)  
GB 300, 300HP  
GB 330  
Wiring by Others  
GB 360, 360HP  
GB 420  
Damper  
Recommended Duct  
and Damper Size  
1¼ in.  
(32)  
1¼ in.  
(32)  
GB 480  
Dimensions shown  
Recommended Roof  
Opening  
in inches (mm)  
GB 500  
GB 540  
All dimensions are in inches (millimeters). *Approximate weight shown in pounds  
(kilograms) is the largest cataloged Open Drip Proof motor.  
The roof curb should be 1½ in. (38 mm) less than the curb cap to allow for roofing  
and flashing.  
Model G/GB Centrifugal Roof Exhaust Fans  
 
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Pre-Starting Checks  
1. Check all fasteners and set screws for tightness. The  
wheel should rotate freely and be aligned as shown  
in Figure 7 below.  
Wheel Rotation  
Clockwise  
Rotation  
All Models  
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. Only G unit - Centering height alignment can be  
accomplished by loosening the set screws in the  
wheel and moving the wheel to the desired position.  
Figure 8  
4. Only GB unit - Centering can be accomplished by  
loosening the bolts holding the drive frame to the  
shock mounts and repositioning the drive frame.  
WARNING  
5. Only GB unit - Wheel and inlet cone overlap can be  
adjusted by loosening the set screws in the wheel  
and moving the wheel to the desired position.  
Correct direction of wheel rotation is critical. Reversed  
rotation will result in poor air performance, motor  
overloading and possible burnout.  
6. Only GB unit - Fan RPM should be checked and  
verified with a tachometer.  
WARNING  
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.  
7. Check wheel rotation (viewing from the shaft side)  
by momentarily energizing the unit. Rotation should  
be clockwise as shown in Figure 8 and correspond  
to rotation decal on the unit. If wheel rotation is  
incorrect, reverse two of the wiring leads or check  
motor wiring for single phase.  
IMPORTANT  
Over tightening will cause excessive bearing wear and  
noise. Too little tension will cause slippage at startup  
and uneven wear.  
Wheel Overlap and Gap Dimensions  
Model  
060-095  
G - Overlap in. (mm) H - Gap in. (mm)  
Model GB  
Pre-Starting Belt Tension Checks  
8. Always loosen tension enough to install belts without  
stretching, see Figure 9.  
G
G
332 (2)  
1
1
97-163  
GB 071-161  
183-243  
4
4
(6)  
(6)  
3
G
8  
8  
2  
(10)  
(10)  
(13)  
3
GB 180-240  
GB 260-540  
Belts  
1
Do not force belt(s). Forcing the  
belt(s) will break the cords and  
cause belt failure  
Figure 9  
G
H
Figure 7  
9. For units with two groove pulleys, adjust so the  
tension is equal in both belts.  
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.  
Figure 10  
Model G/GB Centrifugal Roof Exhaust Fans  
 
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IMPORTANT  
Fasteners  
(4) *Fasteners  
Adjust (tighten) belt tension after the first 24-48 hours  
of operation.  
*Identical fasteners on  
opposing side must also  
be loosened.  
Inspection  
Inspection of the fan should be conducted at the first  
30 minute and 24 hour intervals of satisfactory operation.  
Figure 11  
30 Minute Interval  
Inspect bolts, setscrews and motor mounting bolts.  
Adjust and tighten as necessary.  
11. 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.  
24 Hour Interval  
Check all internal components. On GB unit only, inspect  
belt alignment and tension. Adjust and tighten as  
necessary.  
12a. Sizes 071-161: Belts should be tensioned just  
enough to prevent slippage at full load.  
Note: Belts should have a slight bow on the slack  
side while running at full load (see Figure 12a).  
Maintenance: G / GB  
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.  
Deflection  
Slack  
Side  
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.  
Figure 12a  
Figure 12b  
12b. Sizes 180-540: 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 12b).  
WARNING  
Always disconnect, lock and tag power source before  
servicing. Failure to disconnect power source can  
result in fire, shock or serious injury.  
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.  
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.  
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: G / GB  
1. Before starting up or operating fan, check all  
fasteners for tightness. In particular, check the  
setscrews in wheel hub.  
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.  
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.  
All fasteners should be checked for tightness each  
time maintenance checks are performed prior to  
restarting unit.  
3. Start the fan and shut it off immediately to check  
rotation of the wheel with directional arrow in the  
motor compartment.  
A proper maintenance program will help these units  
deliver years of dependable service.  
4. When the fan is started, observe the operation and  
check for any unusual noises.  
CAUTION  
Uneven cleaning of the wheel will produce an out of  
balance condition that will cause vibration in the fan.  
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.  
WARNING  
This unit should be made non-functional when cleaning  
the wheel or housing (fuses removed, disconnect  
locked off).  
6. Keep inlets and approaches to fan clean and free  
from obstruction.  
Model G/GB Centrifugal Roof Exhaust Fans  
 
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11. During the first few months of operation, check  
bearing setscrews periodically to ensure tightness.  
Belt/Bearing Maintenance GB Unit  
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.  
12. 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.  
Recommended Relubrication  
Frequency in Months  
NOTE: If unusual environment conditions exist (extreme  
temperature, moisture or contaminants) more frequent  
lubrication is required.  
3. For belt replacement, loosen the tensioning device  
enough to allow removal of the belt by hand.  
4. Once installed, adjust belts as shown in  
“Pre-Starting Checks.”  
A good quality lithium base grease, conforming to  
NLGI Grade 2 consistency, such as those listed here  
may be used.  
5. Shaft bearings can be classified in two  
groups: relubricating and non-relubricating. All  
non-relubricating bearings on model GB fans are  
factory lubricated and require no further lubrication  
under normal use (between -20º to 180ºF (-29º to 82ºC)  
in a relatively clean environment).  
Table 2: Suggested Fan Bearing Greasing Intervals  
Interval  
Type of Service  
(months)  
Heavy duty in dirty, dusty locations; high ambient  
1 to 3  
6. On GB 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.  
temperatures; moisture laden atmosphere; vibration.  
12 to 24 hours per day, heavy duty, or if moisture is  
present  
3 to 6  
8 to 16 hours per day in clean, relatively dry  
atmosphere  
6 to 12  
Infrequent operation or light duty in clean  
atmosphere  
12 to 18  
Table 3: Grease Manufacturers  
Manufacturer  
Grease (NLGI #2)  
7. Grease fittings should be wiped clean. The unit  
should be in operation while lubricating. Extreme  
care should be used around moving parts.  
U.S. Electric Motors  
Chevron U.S.A. Inc  
Grease No. 83343  
Chevron SRI Grease #2  
Mobilith  
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. (See Table 3)  
Mobil Oil Corporation  
Texaco, Inc.  
Mobil 532  
Premium BRB #2  
Texaco Multifak #2  
Rykon Premium #2  
Unirex N2  
9. To ensure tightness, check pulley setscrews. Proper  
keys must be in keyways.  
Amoco Oil Co.  
Exxon  
10. Fan RPM should not be readjusted. Only use pulleys  
of identical size and type when replacing pulleys.  
Shell  
B Shell Alvania #2  
Fan Inlet Connections  
In order to assure proper fan performance, caution must be exercised in fan placement and connection to the  
ventilation system. Obstructions, transitions, poorly designed elbows, improperly selected dampers, etc. can  
cause reduced performance, excessive noise and increased mechanical stress. For performance to be as  
published, the system must provide uniform and stable airflow into the fan.  
Good  
Poor  
Poor  
Good  
Provide uniform airflow at fan inlet and through  
the damper to assure optimum performance.  
The curb cap should be three wheel diameters  
from the radius. Use turning vanes in duct  
when possible.  
Dampers must open fully.  
Use motorized dampers  
in low airflow applications  
to reduce losses.  
Avoid sharp turns or  
Provide uniform airflow  
at fan inlet to assure  
optimum performance.  
entrance conditions which  
cause uneven flow. Use  
turning vanes in elbows to  
reduce adverse effects.  
Model G/GB Centrifugal Roof Exhaust Fans  
 
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Troubleshooting  
WARNING: Before taking any corrective action, make certain unit is not capable of operation during repairs.  
PROBLEM  
CAUSE  
CORRECTIVE ACTION  
Adjust wheel and/or inlet cone. Tighten wheel hub or bearing collars  
on shaft.  
Wheel rubbing inlet  
Tighten pulleys on motor/fan shaft. Adjust belt tension. Align pulleys  
properly, see page 6, Figure 9-10. Replace worn belts or pulleys.  
V-belt drive  
Bearings  
Replace defective bearing(s). Lubricate bearings. Tighten collars  
and fasteners.  
Clean all dirt off wheel. Check wheel balance, rebalance in place if  
necessary.  
Wheel unbalance  
Excessive noise  
or vibration  
Belts too tight or too loose  
Adjust tension, see page 7, Figure 12a-b.  
Wheel improperly aligned and  
rubbing  
Center wheel on inlet, see page 6, Figure 7.  
Align and tighten. See “Pre-Starting Checks”, see page 6.  
Loose drive or motor pulleys  
Foreign objects in wheel or housing Remove objects, check for damage or unbalance.  
Fan base not securely anchored  
Motor hood loose and rattling  
Defective or loose motor bearings  
Fan  
Secure properly.  
Tighten screws securing motor hood.  
Replace motor with same frame size, RPM-HP.  
Check rotation of wheel, see page 6, Figure 8. Reduce fan speed.  
High horsepower  
Resize ductwork. Check proper operation of face and bypass dampers.  
Check filters and access doors.  
Duct system  
Check fuses/circuit breakers. Check for switches off. Check for correct  
supply voltage.  
Electrical supply  
Fan does  
not operate  
Drive  
Check for broken belts. Tighten loose pulleys.  
Motor  
Assure motor is correct horsepower and not tripping overload protector.  
Check for excessive or insufficient grease in the bearing.  
Lubrication  
Replace damaged bearing. Relieve excessive  
belt tension. Align bearings. Check for bent shaft.  
Mechanical  
Adjust tension or replace bad belts, see page 6-7.  
Contact power company.  
Belt slippage  
Over/Under line voltage  
Incorrect wheel rotation  
Motor overloads  
or overheats  
Check motor wiring (page 4) verify motor is wired for correct rotation.  
Check drives or slow down fan by opening variable pitch pulley on  
motor shaft.  
Wheel RPM too high  
Undersized motor  
Check motor ratings with catalog speed and air capacity chart.  
Check motor wiring to wiring diagram located on fan motor.  
Motor wired incorrectly  
Check system: Proper operation of backdraft or control dampers,  
obstruction in ductwork, clean dirty filters.  
System resistance too high  
Unit running backwards  
Excessive dirt buildup on wheels  
Improper wheel alignment  
Dampers closed  
Correct as shown on page 6, Figure 8.  
Clean wheel.  
Center wheel on inlets, see Pre-Starting checks on page 6, Figure 7.  
Inspect and repair.  
Reduced airflow  
Blocked duct/clogged filter  
Belt slippage  
Clean or replace.  
Replace and adjust tension.  
Check for correct drives.  
Speed too slow  
Model G/GB Centrifugal Roof Exhaust Fans  
 
9
®
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.) _____________  
Maintenance Log  
Date  
Time  
Notes  
Model G/GB Centrifugal Roof Exhaust Fans  
10  
®
 
G Direct Drive Centrifugal Roof Exhaust Fan  
Parts List  
NOTE  
Each fan bears a manufacturer’s name-  
plate 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.  
Motor Cover  
Motor  
Shock  
Mounts  
Hood Clip  
Shroud  
Shroud Brace  
Birdguard  
Wheel  
Vertical  
Support  
Lower  
Windband  
Curb Cap/  
Venturi  
GB Belt Drive Centrifugal Roof Exhaust Fan  
Motor Cover  
Belt  
Shaft Pulley  
Motor Pulley  
Bearings  
Motor  
Drive Frame  
Assembly  
Shock Mounts  
Fan Shaft  
Shroud  
Wheel  
Birdguard  
Shroud Brace  
Conduit  
Chase  
Windband  
Vertical  
Support  
Curb Cap/  
Venturi  
Model G/GB Centrifugal Roof Exhaust Fans  
 
11  
®
Roof Curb Installation  
Warranty  
Greenheck warrants this equipment to be free from defects in material and workmanship for a period of one year from  
the shipment 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 G/GB 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 can be  
®
Phone: (715) 359-6171 • Fax: (715) 355-2399 • E-mail: [email protected]Website: www.greenheck.com  
471558 • Model G/GB IOM, Rev. 3, October 2010  
Copyright 2010 © Greenheck Fan Corp.  
12  
 

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