Greenheck Fan manual Construction Features, Models G and GB

Construction Features

Models G and GB

Standard Construction Features

1Wheel

An aluminum, backward-inclined, non-overloading centrifugal wheel is utilized to generate high-efficiency and minimal sound.. Wheel cones are carefully matched to the venturi for maximum efficiency. Each wheel is robotically welded and statically and dynamically balanced for long life and quiet operation..

2	Disconnect	NEMA-1 switch is factory mounted and wiring is provided from the motor as standard
		(other switches are available). All wiring and electrical components comply with the
	Switch
		National Electrical Code® (NEC) and are either UL Listed or Recognized.
3		Precisely sized, ground and polished so the first critical speed is at least 25% over
	Fan Shaft	the maximum operating speed. Where the shaft makes contact with bearings, tight
		tolerances result in longer bearing life..
4	Bearings	100% factory tested and designed specifically for air handling applications with a
		minimum L10 life in excess of 100,000 hours (L 50 life of 500,000 hours)..
5	Motor	Carefully matched to the fan load and is mounted out of the airstream..
6	Motor Cover	Constructed of aluminum, machine-punched, and attached with fasteners that provide
		for easy removal and access to motor compartment and drive assembly..
		Cooling fins located on top of the fan wheel draw outside air through a large space

7Motor Cooling between the fan shroud and the motor cover directly into the motor compartment. Positive motor cooling with fresh air results in maximum motor life.

8Lifting Points Various lifting points are located on the drive frame and bearing plate (on select sizes).

9True Vibration Vibration isolators, with no metal-to-metal contact, support the drive assembly and

Isolation wheel for long life and quiet operation.

10	Drive Assembly	Belts, pulleys, and keys are oversized 150% of driven horsepower. Machined cast
		pulleys are adjustable for final system balancing.. Belts are static-free and oil-resistant..
11	Lower Windband	Heavy-gauge aluminum with formed edges for added strength and provides
		weather resistance.
12	Curb Cap	Curb cap (with integral deep spun venturi) is constructed of aluminum and is one-piece
		for a weather-tight fit.

13Internal Conduit A large diameter conduit for installing electrical wiring through the curb cap into the motor compartment..Chase

14	Nameplate	Permanent stamped aluminum plate for exact model and serial number identification..
15	Galvanized	Rigid wire protects the fan discharge from birds and small objects.
	Birdscreen
16	Fan Shroud	One-piece, heavy-gauge aluminum with a rolled bead for extra strength directs
		exhaust air downward.
17	Mounting Holes	Curb cap has prepunched mounting holes to ensure correct attachment to the roof..

High Wind Construction Features

18Internal Supports

Heavy-gauge supports and bracing are added for additional strength to withstand a wind of 150 mph (75 psf)..

19	Reinforced	High wind fans include additional reinforcement for maximum strength.
	Wind Band
	Roof Curb	High wind load fans are certified for use with Greenheck model SD, SDP, GPF or
		equivalent in high wing applications. Roof curbs ship separate for field installation
	(page 10)
		with attachment details provided.

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