Specifications
Direct Drive Specifications
The LD and LDP exhaust fans shall be direct drive type. The fan wheel shall be centrifugal backward inclined, constructed of aluminum and shall include a wheel cone carefully matched to the fan’s venturi for precise running tolerances. Wheels shall be statically and dynamically balanced. The fan shall be constructed of heavy gauge steel or aluminum with a rigid internal support structure and a birdscreen.
Motors shall be mounted on vibration isolators. Motors shall be readily accessible for maintenance.
A disconnect switch shall be factory installed and wired from the fan motor to a junction box within the motor compartment. A conduit chase shall be provided through the curb cap to the motor compartment for ease of electrical wiring.
All fans shall bear the AMCA Certified Ratings Seal for sound and air performance.
Each fan shall bear a permanently affixed manufacturer’s engraved aluminum nameplate containing the model number and individual serial number for future identification.
Fans shall be models LD or LDP as manufactured by Greenheck Fan Corporation in Schofield, Wisconsin, USA.
BELT DRIVE SPECIFICATIONS
The LB and LBP exhaust fans shall be belt drive type. The fan wheel shall be centrifugal backward inclined, constructed of aluminum and shall include a wheel cone carefully matched to the fan’s venturi for precise running tolerances.
Wheels shall be statically and dynamically balanced. The fan shall be constructed of heavy gauge steel or aluminum with a rigid internal support structure and birdscreen.
Motors shall be heavy duty ball bearing type, carefully matched to the fan load, and furnished at the specified voltage, phase and enclosure. Drive frame assembly shall be constructed of heavy gauge steel. Motors and drives shall be mounted on vibration isolators. Motors and drives shall be readily accessible for maintenance.
Precision ground and polished fan shafts shall be mounted in permanently sealed, lubricated pillow block ball bearings. Bearings shall be selected for a minimum L10 life in excess of 100,000 hours (L50 average of 500,000 hours) at maximum cataloged operating speed. Drives shall be sized for a minimum of 150% of driven horsepower. Pulleys shall be of the cast type, keyed and securely attached to the wheel and motor shafts.
Motor pulleys shall be adjustable for final system balancing. A disconnect switch shall be factory installed and wired from the fan motor to a junction box installed within the motor compartment. A conduit chase shall be provided through the base to the motor compartment for ease of electrical wiring.
All fans shall bear the AMCA Certified Ratings Seal for sound and air performance.
Each fan shall bear a permanently affixed manufacturer’s engraved aluminum nameplate containing the model number and individual serial number for future identification.
Fans shall be models LB or LBP as manufactured by Greenheck Fan Corporation in Schofield, Wisconsin, USA.
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