Greenheck Fan Series L manual Standard Installation, Unique Construction Features

Unique Construction Features

1FABRA HOOD STYLE - Models LD and LB have a rib-lock aluminum housing. Hood panels are interlocked and attached to sturdy aluminum rails. (Galvanized housings are optional).

2HINGED ACCESS - The entire hood assembly on models LD and LB can be hinged open for access to the internal fan components.

3LOUVERED PENTHOUSE - Models LDP and LBP penthouse style housings are constructed of heavy extruded aluminum louvers with mitered and welded corners.

4HOOD COVER - Models LDP and LBP aluminum hood covers are hinged and removable for access.

5DRIVE FRAME - Constructed from heavy gauge galvanized steel. Belt adjustment is accomplished by loosening fasteners, sliding the motor plate, and retightening fasteners.

6FAN 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.

7BEARINGS - 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).

8CURB CAP - Curb cap has prepunched mounting holes to ensure correct attachment to the curb.

9MOTOR - Permanently lubricated, sealed ball bearing motors are selected to provide years of trouble-free operation.

10DRIVE 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.

11WHEEL - An aluminum, backward inclined, non-overloading, centrifugal wheel is utilized to deliver maximum efficiency. Each wheel is statically and dynamically balanced.

12VIBRATION ISOLATORS - Support the drive assembly and wheel without steel to steel contact providing long life and quiet operation.

13BIRDSCREEN - Galvanized rigid wire protects the fan’s discharge from birds or small objects. (Aluminum birdscreen is optional).

14WINDBAND - Lower windband assembly ensures weathertight and rigid unit construction.

15DISCONNECT SWITCH - NEMA-1 switch is factory mounted and wiring is provided from the motor to the disconnect enclosure as standard. All wiring and electrical components comply with the National Electric Codes (NEC) and are UL Listed or Recognized.

16CONDUIT 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	3/4 in.		8 to 12 in.
performance data pages.
			(203 to 305 mm)
	(19 mm)
Installation must include a means for inspecting,
cleaning, and servicing the exhaust fan.
Due to the varying airstreams encountered in		Damper
commercial ventilation, system designers must		Recommended
be aware of national, state, and local codes and	1 1/4 in.		1 1/4 in.
		Duct and
guidelines governing these installations. Local code	(32 mm)	Damper Size	(32 mm)
authorities should be consulted before proceeding		Recommended
with any ventilation project.		Roof Opening

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