Greenheck USGF-140 User Manual
Centrifugal Exhaust Fans
Model USGF - Ultimate Steel Grease Fan
• Charbroilers, Solid Fuel Cooking, Oriental Cooking and High Wind Applications
February
2008
Ultimate Steel
Grease Exhaust Fan
Designed for severe grease applications...
When you choose a Greenheck USGF fan, you have selected a fan with the industry’s best performance and
durability for heavy grease applications (as stated in NFPA’s Chapter 11 restaurants and food service where
high amounts of grease and/or solid fuels are used). The USGF fan is specifically designed for severe grease
applications and to discharge air directly away from the mounting surface.
• Leakproof construction for the entire life of the fan utilizing a one-piece steel windband that is
continuously welded to the curb cap.
• Only spun steel fan in the industry.
• Performance up to 3.25 in. wg (810 Pa) and 6,800 cfm (11,550 m3/hr).
• Withstands the most severe cleaning conditions.
• Most advanced motor cooling of any grease fan. Capable of continuously handling 400° F airstream
temperatures.
• Performance as cataloged is assured. All fan sizes are tested in our AMCA Accredited Laboratory, and all
models are licensed to bear the AMCA Sound and Air performance seals.
• UL Listed for electrical and grease applications.
• Greenheck subjects these products to extensive life testing, assuring you that the fans will provide many
years of reliable performance.
• Only kitchen exhaust fan to meet Miami-Dade Test protocols for large Missile Impact Test.
Greenheck Fan Corporation certifies that the
Model USGF fan shown herein is licensed to bear
the AMCA Seal. The ratings shown are based on
tests and procedures performed in accordance
with AMCA Publication 211 and Publication 311
and comply with the requirements of the AMCA
Certified Ratings Program. The certified ratings
for Model USGF are shown on pages 10 to 18.
Model USGF is listed for
electrical (UL/cUL 705)
File no. E40001
Model USGF is listed for
grease removal (UL/cUL
762) File no. MH11745
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Leading-Edge Technical Support
When you need extensive product and IOM (Installation
and Operating Manual) information, our products are
supported by the industry’s best product literature,
electronic media and computer aided selection
program (CAPS). You’ll also find this information on our
website at www.greenheck.com
You can always count on personal service and
expertise from our national and international
representative organization. To locate your nearest
Greenheck representative, call 715-359-6171 or visit our
website at www.greenheck.com
World-Class Manufacturing
Greenheck’s skilled production workers use cost-effective
machines and unique dies designed and built by our
own engineers to add innovative features and greater
strength to our centrifugal exhaust fans. Our advanced
manufacturing processes and quality control procedures
always ensure the highest product quality. And just to
be sure you get the peace-of-mind you expect when you
specify Greenheck, our assembly inspectors test run and
monitor every fan before it leaves the factory. Results
of these tests are kept in permanent records for future
reference.
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Severe Weather
Applications
Forceful winds and wind-borne debris are the cause of most hurricane damage. Hurricane winds start
at 75 mph. At speeds of 140 mph wind can exert a 130 pound per square foot pressure or 900 pounds
of force on a fan and curb. Forceful winds are not the only problem; wind-borne debris can also cause
detrimental effects to objects and structures.
Miami-Dade County has the strictest test protocols in the country for wind-borne debris and wind
loading tests. Greenheck has gone one step further with the model USGF by third-party testing to the
Miami-Dade County Test Protocols.
These protocols were designed to protect against wind-born debris and severe wind loads.
• Structural Performance per Dade County Protocol TAS 202 (ASTM E-330).
• Large Missile Impact Testing per Dade County Protocol TAS 201.
Structural Performance Load: A static load that is 1.5 times the design load (195 pounds per square
foot pressure) is applied both positive and negative to simulate wind force loads in each direction.
Large Missile Impact Test: Is required when objects are located 30 feet or less from the ground. The
test unit is impacted three times with a piece of lumber (2 in. x 4 in. x 6 ft) weighing approximately nine
pounds and traveling at 34 mph. This simulates wind-borne debris striking the fan.
Miami-Dade County test protocols: Greenheck has gone the extra mile and worked with Miami-Dade
County to design a High Velocity Hurricane Zone standard for rooftop fans. The USGF has become the
first rooftop fan certified and approved by the Miami Dade Building Code Compliance office and Texas
Department of Insurance for use in hurricane zones. The certifications can be viewed on the Miami-Dade
County website under NOA #07-0503.06 or the Texas Department of Insurance Windstorm website.
When severe weather is a threat, don’t specify anything less than the Greenheck model USGF and the
SD curb.
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Standard
Construction Features
1
Fan Shaft - Is 1-inch minimum in diameter and is
precisely sized, ground, and polished so the first
critical speed is at least 25% over the maximum
operating speed, which results in longer fan life.
2
Bearings - Lubricatable cast pillow block and are
air handling quality extended life L10 > 100,000
hours (L50 average life > 500,000 hours)
3
True Vibration Isolation - Lowers sound levels
and reduces vibration, which increases the fans
life since true vibration has no steel to steel
contact.
4
Clean Out Port - Allows the outside of the wheel
to be cleaned through a four-inch diameter
removable plug in the windband.
5
Non-Stick Coated Steel Wheel - Heavy
weight steel wheel with a dry lubricate
coating eliminates imbalance in heavy grease
applications. The steel wheel is a backwardinclined, non-overloading centrifugal type.
6
Drain Trough - All grease and water is collected
at one-point for easy disposal.
7
Curb Cap with Mounting Holes - Prepunched
mounting holes in the steel curb cap to ensure
correct attachment to the roof.
Hinged Curb Cap with Cables - Allows entire fan
8
to tilt away for access to wheel and ductwork
for inspection and cleaning. Shipped for field
assembly.
9
Leakproof Construction - One-piece fully welded
windband to curb cap. Assures no grease will
leak onto roof through the fan’s seams.
10
Drive Assembly - Dual belts, pulleys, and keys are
oversized 150% of driven horsepower. Machined
cast steel pulleys are adjustable for final system
balancing. Belts are static free and oil resistant.
11
Motor Cover - Is easily removed for access to the
steel motor compartment and drive assembly.
12
Powder Coated - Unit is constructed of a minimum
of 16 gauge galvaneal steel. Entire unit is powder
coated with a chemical resistant Permatector
finish.
13
Motor - Carefully matched to the fan load and is
mounted out of air stream.
14
Windband - Unique spun from galvaneal steel
achieves superior strength & consistent material
thickness.
15
Nema-3R Disconnect Switch Mounted & Wired -
Motor and switch are prewired to specified voltage.
16
Motor Cooling Tube - Maximum motor life is
achieved through positive motor cooling with fresh
outside air being continuously drawn through the
large breather tube directly over the motor.
Name Plate - Exact model and serial identification
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on a permanent stamped aluminum plate.
18
Heat Baffle - Extends motor life by reducing the
amount of heat that penetrates through the bottom
of the motor support pan.
19
Lifting Lugs - Located under motor compartment
for ease of lifting unit during installation.
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10
11
2
12
14
15
17
19
13
16
5
4
3
8
9
6
7
18
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Options and Accessories
Self Draining Grease System:
Drain grease and rain water
back through the ductwork
into the specially designed
Greenheck hood. The hood
then channels grease and rain
water into the restaurant’s floor
grease trap.
Coatings: Wide variety of coatings and colors are
available for decorative to acidic applications.
Permatector™ is our standard coating.
PERMATECTOR®
Typically used for applications that
require corrosion resistance in indoor
and outdoor environments.
Hi-Pro Polyester is resistant to salt
HI-PRO
POLYESTER
water, chemical fumes and moisture in
more corrosive atmospheres. Typically
used for applications that require
superior chemical resistance, excellent
HI-PRO
POLYESTER
abrasion and outdoor UV protection. This
coating exceeds protective qualities of
Air Dried Heresite and Air Dry Phenolic.
Vented Curb Extension:
Mounts between roof
curb and roof mounted
fans to meet NFPA
requirements of 40 in.
minimum discharge
above the roof when
mounted on a minimum
8 in. high roof curb.
Severe Duty Curb: Model SD is specifically
designed for the optional hurricane use. It is
attached directly to the building structure with
extremely high structural design load requirements.
Maximum design load is 130 psf.
Drain Connection:
Allows for single point
drainage of grease, water
or other residues.
Grease Trap: Aluminum
trap designed to collect
grease residue to avoid
drainage onto roof
surface.
BAKED
ENAMEL
Baked Enamel Decorative Coatings
are heat cured enamels applied either
as wet paints or electrostatic powders.
Customers can choose from 16 standard
decorative colors or color match any
color.
Windband Extension: Tube that raises fans
discharge an additional 36 in. for special code
requirements.
Curb Seal: Rubber seal between fan and curb to
assure proper sealing when attached to a curb.
Roof Curbs: Wide variety of roof curbs are
available for mounting the fan to the roof, including:
vented, flanged, pitched.
Grease Trap with
Absorbent Material:
Same as above with an
absorbent material to
collect grease residue
and repel water for easy
periodic disposal.
Tie Down Points: Four
brackets located on the
windband for securing
the fan in heavy wind
applications.
Velocity Accelerator: Increases fan outlet/
discharge velocity. Up to 3,000 feet per minute.
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