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Model G/GB 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.
®
PN 471558
Downblast Centrifugal Roof Exhaust Fans
Model G
Direct Drive
Model G is a direct drive downblast
centrifugal exhaust fan. These
fans are specifically designed
for roof mounted applications
exhausting relatively clean air.
Performance capabilities range
up to 4,300 cfm (7,305 m
3
/hr) and
up to 1 in. wg (249 Pa) of static
pressure. The maximum continuous
operating temperature is 180°F
(82ºC). G models are available
in 27 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.
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.
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.
Model GB
Belt Drive
GB Model Fans are belt drive
downblast centrifugal exhaust fans.
These fans are specifically designed
for roof mounted applications
exhausting relatively clean air.
Performance capabilities range up
to 44,700 cfm (75,950 m
3
/hr) and
up to 2.5 in. wg (623 Pa) of static
pressure. The maximum continuous
operating temperature is 180°F
(82ºC). GB models are available in
twenty sizes with nominal wheel
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.
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Inhaltsverzeichnis

Seite 1

1Model G/GB Centrifugal Roof Exhaust FansInstallation, Operation and Maintenance ManualPlease read and save these instructions. Read carefully before

Seite 2 - Handling

10Model G/GB Centrifugal Roof Exhaust Fans®Maintenance DocumentationMaintenance LogDate Time NotesJob InformationJob Name: ___________________________

Seite 3 - Inspection and Maintenance

11Model G/GB Centrifugal Roof Exhaust Fans®Parts ListNOTEEach fan bears a manufacturer’s name-plate with model number and serial number embossed. This

Seite 4 - Installation

12471558 • Model G/GB IOM, Rev. 3, October 2010 Copyright 2010 © Greenheck Fan Corp.Greenheck warrants this equipment to be free from defects in mate

Seite 5 - GB - Belt Drive

2Model G/GB Centrifugal Roof Exhaust Fans®ReceivingUpon receiving the product, check to make sure all items are accounted for by referencing the bill

Seite 6 - Pre-Starting Checks

3Model G/GB Centrifugal Roof Exhaust Fans®StorageFans are protected against damage during shipment. If the unit cannot be installed and operated immed

Seite 7 - Operation: G / GB

4Model G/GB Centrifugal Roof Exhaust Fans®WARNINGInstallation, troubleshooting and parts replacement is to be performed only by qualified personnel.WAR

Seite 8 - Frequency in Months

5Model G/GB Centrifugal Roof Exhaust Fans®G - Direct DriveModelCurb CapDamperRoof Opening*Approx. WeightG 060, 065, 070, 075 17 (432) 8 (203) 10½ (26

Seite 9 - Troubleshooting

6Model G/GB Centrifugal Roof Exhaust Fans®WARNINGCorrect direction of wheel rotation is critical. Reversed rotation will result in poor air performanc

Seite 10 - Maintenance Log

7Model G/GB Centrifugal Roof Exhaust Fans®IMPORTANTAdjust (tighten) belt tension after the first 24-48 hours of operation.InspectionInspection of the f

Seite 11 - Parts List

8Model G/GB Centrifugal Roof Exhaust Fans®Belt/Bearing Maintenance GB Unit 1. Belts tend to stretch after a period of time. They should be checked

Seite 12 - Roof Curb Installation

9Model G/GB Centrifugal Roof Exhaust Fans®TroubleshootingWARNING: Before taking any corrective action, make certain unit is not capable of operation d

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