Greenheck LB-14-4 User Manual

Centrifugal Roof Exhaust Fans

Series L

Low Silhouette

Louvered Penthouse Style LDP/LBP

Fabra Hood Style LD/LB

May

2009

Series L

Centrifugal Roof Exhaust Fans

Greenheck’s Series L, low silhouette, models LD, LB, LDP, and LBP centrifugal roof exhaust fans provide the industry’s best performance and durability for general clean air applications.

• Broadest performance in the industry, up to 1.25 in. wg (311 Pa) and 37,500 cfm (63,713 m

• 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.*

• Greenheck subjects these products to extensive life testing, assuring you the fans will provide years of reliable performance.

Greenheck Fan Corporation certifies the models LD, LDP, LB, and LBP shown herein are licensed to bear the AMCA seal. The ratings shown are based on tests and procedures performed in accordance with AMCA Publication 211 and AMCA Publication 311 and comply with the requirements of the AMCA Certified Ratings Program.

*UL is optional and must be specified. Models LD, LDP, LB, and LBP are listed for electrical (UL/cUL 705) File no. E40001.

/hr).

Leading Edge Technical Support

When you need extensive product or installation and operating manual (IOM) information, our products are supported by the industry’s best product literature, electronic media and computer aided product selection (CAPS) program. 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

Quick Build Programs

Our Quick Build (QB) Program ensures rapid response time when your needs require a fast turnaround. Select from more than 40 configurations of the Series L, low silhouette model fan and we will manufacture and ship them within ten days. We have strategically located many warehouses across the United States and internationally to fill your request at a moments notice.

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 roof 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.

Unique Construction Features

Louvered Penthouse Style

• Hinged Cover - All sizes feature an

aluminum cover which may be hinged to provide quick access to the motor and drive assembly. Covers are fastened down with a quick release hood latch.

• Large Interior Dimensions - All sizes allow

complete accessibility from above. Interior dimensions offer clearance for inspection, cleaning, or maintenance of the motor, wheel, belt(s), and drives.

• Strength & Weather Resistant - Each unit

features storm resistant aluminum louver blades with mitered corners. For decades, our storm resistant blades have proven highly effective. Each sturdy extruded aluminum louver blade has a material thickness of 0.080 inches.

Greenheck’s louvered penthouse hoods feature heavy gauge extruded aluminum louvers with mitered corners for a clean, finished appearance and weather resistant construction.

The interior vertical edge of the curb cap forms the throat and weathershield. Each corner is also shielded to prevent leakage.

Penthouses are available in aluminum for lasting durability and appearance.

Fabra Hood Style

• Hinged Hood - All sizes feature a hood

which may be hinged to provide quick access to the motor and drive assembly. Access may be gained by simply removing two of the four hood fasteners or all fasteners for complete removal.

• Large Interior Dimensions - All sizes allow

complete accessibility. Interior dimensions offer clearance for inspection, cleaning, or maintenance of the motor, wheel, belt(s), and drives.

• Strength & Weather Resistance - The

hood is designed with arched panels manufactured of heavy gauge, precision roll formed steel with interlocking edges. Each interlocking rib creates a tight, weather resistant seal. Heavy gauge steel support members provide structural strength. The first hood was put into service over 30years ago.

Greenheck’s interlocking rib design combines four material thicknesses with I-beam design principles producing a hood far superior in strength to conventional designs (an important feature in high wind and snow load regions).

Formed channels adjacent to the ribs provide water drainage to ensure weather tightness.

Hoods are available in galvanized steel, coated steel, or aluminum construction.

LB/LD

Fabra Hood Style

LBP/LDP

Louvered Penthouse Style

Unique Construction Features

Recommended

Duct and

Damper Size

Recommended

Roof Opening

1 1/4 in.

(32 mm)

3/4 in.

(19 mm)

Damper

8 to 12 in.

(203 to 305 mm)

1 1/4 in.

(32 mm)

FABRA HOOD STYLE - Models LD and LB have

a rib-lock galvanized housing. Hood panels are interlocked and attached to sturdy galvanized rails. (Aluminum housings are optional).

HINGED ACCESS - The entire hood assembly

on models LD and LB can be hinged open for access to the internal fan components.

LOUVERED PENTHOUSE - Models LDP and

LBP penthouse style housings are constructed of heavy extruded aluminum louvers with mitered and welded corners.

HOOD COVER - Models LDP and LBP

aluminum hood covers are hinged and removable for access.

DRIVE FRAME - Constructed from heavy

gauge galvanized steel. Belt adjustment is accomplished by loosening fasteners, sliding the motor plate, and retightening fasteners.

FAN SHAFT - Precisely sized, ground, and

polished so the first critical speed is at least 25% over the maximum operating speed. Close tolerances between the shaft and bearing result in longer bearing life.

BEARINGS - 100% factory tested and designed

specifically for air handling applications with a minimum L10 life in excess of 100,000 hours (L50 average life of 500,000 hours).

CURB CAP - Curb cap has prepunched

mounting holes to ensure correct attachment to the curb.

MOTOR - All motors are carefully matched to

the fan load to provide years of trouble free operation.

DRIVE ASSEMBLY - Drives are oversized 150%

of driven horsepower. Machined cast iron pulleys are factory set to the required RPM and are adjustable for final system balancing. Belts are static free and oil resistant.

WHEEL - An aluminum, backward inclined,

non-overloading, centrifugal wheel is utilized to deliver maximum efficiency. Each wheel is statically and dynamically balanced.

VIBRATION ISOLATORS - Support the drive

assembly and wheel without steel to steel contact providing long life and quiet operation.

BIRDSCREEN - Galvanized rigid wire protects

the fan’s discharge from birds or small objects. (Aluminum birdscreen is optional).

WINDBAND - Lower windband assembly

ensures weathertight and rigid unit construction.

DISCONNECT SWITCH - NEMA-1 switch is

factory mounted. Wiring from the motor to the disconnect enclosure is provided as standard. All wiring and electrical components comply with the National Electric Codes (NEC) and are UL Listed or Recognized.

CONDUIT CHASE - A large diameter conduit for

installing electrical wiring through the curb cap into the motor compartment. (Not shown)

Standard Installation

Models LB, LD, LBP, and LDP exhaust fans are designed to meet the needs of general clean air applications. Tests have been conducted to ensure safe and reliable fans capable of withstanding normal exhaust conditions.

When roofing materials extend to the top of the curb, roof curbs should be 11⁄2 in. (38 mm) (3/4 in. (19 mm) on a side) less than the unit curb cap to allow for roofing and flashing.

For recommended duct size, damper size, and roof opening dimensions, refer to CAPS or the performance data pages.

Installation must include a means for inspecting, cleaning, and servicing the exhaust fan.

Due to the varying airstreams encountered in commercial ventilation, system designers must be aware of national, state, and local codes and guidelines governing these installations. Local code authorities should be consulted before proceeding with any ventilation project.

Options and Accessories

BIRDSCREEN - Galvanized mesh is standard.

Optional aluminum or stainless steel rigid wire are also available.

HOOD INSULATION - Hood insulation is dual-

density to minimize condensation, reduce thermal transfer, and enhance sound absorption at high and low frequencies.

LIFTING LUGS - Four heavy gauge steel brackets

are available to provide lifting points when raising the fan to the roof.

TIE DOWN POINTS - Four heavy gauge steel

brackets are available to secure the fan in heavy wind applications. Cables and anchors by others.

COATINGS - All Greenheck coatings and resistance

charts can be found in the performance coatings catalog. A wide variety of coatings and colors are available in two categories:

Decorative coatings – Sixteen standard colors

are available.

Protective coatings – Five electrostatic applied

powder coatings are available to protect against most environments.

DAMPERS - Designed to

prevent outside air from entering back into the building when fan is off. Options include gravity and motorized dampers. Damper sizes are shown on each performance data page.

CURB SEAL - Rubber seal between fan and curb

to ensure proper sealing when attached to a curb.

DISCONNECT SWITCHES -

A wide selection of NEMA rated switches are available for positive electrical shutoff and safety, including: dusttight, rainproof, and corrosionresistant. Switches may be internally or externally mounted.

SPEED CONTROLLERS - Available for use with

shaded pole and permanent split capacitor (PSC) open motors on models LD and LDP fans. They provide an economical means of system balancing with direct drive fans.

CURB EXTENSIONS - Extensions raise the fan

discharge above the roof line and provide an accessible mounting location for dampers. Insect screen bases constructed with a removable fine mesh are recommended for applications where insect entry must be prevented. Curb extensions are not available with LDP and LBP severe duty construction models.

ROOF CURBS - Prefabricated roof curbs reduce

installation time and costs by ensuring compatibility between the fan, curb and roof opening. All curbs are insulated with fiberglass. A wide variety of roof curbs are available including flanged, pitched and sound-absorbing.

Severe Duty Option

OUTSIDE CURB DIMENSION

ROOF OPENING

12, 18 OR 24 INCHES

(305, 457, 610 MM)

THROAT DIMENSION

(ROOF OPENING)

1 INCH (25 MM) INSULATION

6 INCH x 3 INCH

(152 MM x 76 MM)

STEEL MOUNTING ANGLE

(12 GAUGE MINIMUM)

RECOMMENDED

DUCT & DAMPER SIZE

1-1/4 INCH

(32 MM)

4 IN.

(102 MM)

1-3/4 INCH (44 MM)

3/4 INCH (19 MM)

4 IN.

(102 MM)

4 IN.

(102 MM)

4 IN

(102 MM)

1-3/4 INCH

(44 MM)

2-1/2 INCH (64 MM)

2-1/2 INCH

(64 MM)

1-3/4 INCH (44 MM)

CONCRETE

ROOF TRUSS

CORRUGATED ROOF DECK

SEVERE DUTY - Specifically designed for applications with extremely

high structural design load requirements. The severe duty models LDP and LBP are far superior to any centrifugal roof exhaust fan currently in the market. Designed with structural steel supports and ESD-603D louver blades, the severe duty louver enclosure (SDLE) may be used in any application which requires a fan to endure high winds with the potential of wind blown debris. The louvered housing has been tested in accordance with the following Miami-Dade test protocols:

• Large Missile Impact Test - TAS-201-94

• Uniform Static Air Pressure - TAS-202-94

• Uniform Cyclic Wind Loading - TAS-203-94

To meet the above protocols, the severe duty fan must be mounted on a severe duty roof curb, which is attached directly to the building structure. Maximum design load is 140 psf.

Available on sizes

• LDP - 60 though 120

• LBP - 10 through 30

Weights and dimensions will vary from standard LDP and LBP construction.

NOTICE OF ACCEPTANCE

NUMBER 08-0429.05

Severe Duty Installation

Models LDP and LBP severe duty exhaust fans are designed to meet the needs of general clean air applications. Tests have been conducted to ensure safe, rugged and reliable fans capable of withstanding severe exhaust conditions.

The severe duty roof curb model SD is supplied with this product and is designed with 12 gauge welded steel construction. Greenheck recommends the severe duty curb to be anchored to the structure of the building. Dependent upon roofing material it shall be bolted and welded. For recommended duct size, refer to CAPS or installation manual.

Installation must include a means for inspecting, cleaning, and servicing the exhaust fan.

Severe Duty Dimensions

LDP - SEVERE DUTY DIMENSIONS

LBP - SEVERE DUTY DIMENSIONS

Model

Number

A B C D E

Damper

Size

(square) 60 65

(432)

347⁄8

(886)

347⁄8

(886)

175⁄8

(448)

13⁄4

(44)

(203)

LDP

80 85 90

(483)

367⁄8

(934)

367⁄8

(934)

175⁄8

(448)

13⁄4

(44)

(254)

LBP

100 120

(559)

(660)

(762)

(864)

(1016)

397⁄8

(1013)

397⁄8

(1013)

437⁄8

(1114)

477⁄8

(1216)

517⁄8

(1318)

577⁄8

(1470)

397⁄8

(1013)

503⁄8

(1280)

517⁄8

(1318)

577⁄8

(1470)

617⁄8

(1572)

697⁄8

(1775)

195⁄8

(498)

181⁄8

(460)

181⁄8

(460)

245⁄8

(625)

245⁄8

(625)

271⁄4

(692)

13⁄4

(44)

13⁄4

(44)

13⁄4

(44)

13⁄4

(44)

13⁄4

(44)

13⁄4

(44)

(305)

(406)

(457)

(610)

(762)

All dimensions are in inches (millimeters). Weight in pounds (kilograms). *Weight shown is the largest cataloged Open Drip Proof motor.

Roof Opening (square)

101⁄2

(267)

121⁄2

(318)

141⁄2

(368)

101⁄2

(267)

101⁄2

(267)

101⁄2

(267)

⁄2

(267)

101⁄2

(267)

101⁄2

(267)

Weight*

375

(170)

400

(181)

425

(193)

550

(249)

550

(249)

550

(249)

700

(318)

800

(363)

950

(431)

Cover

Thickness

0.100

(0.045)

aluminum

0.100

(0.045)

aluminum

Louver

Thickness

0.125

(0.056)

aluminum

0.125

(0.056)

aluminum

Curb Cap

Thickness

0.25

(0.113)

steel

0.25

(0.113)

steel

+ 16 hidden pages