| Housing |
| The fan windband shall be constructed of heavy gauge aluminum or G90 Galvanized and shall be spun
on an automatic lathe to provide consistent dimensions. Horizontal and vertical
internal supports shall be used to securely fasten the windband to the discharge
apron to provide rigidity for hinging and added strength to reduce shipping damage.
The discharge apron shall have a rolled bead for added strength. |
|
| Base |
| The base shall be constructed of galvanized steel for improved rigidity. Base
corners shall be welded to provide strength and support for hinging and cleaning
and to prevent leakage into the building.
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|
| Wheel |
| The fan wheel shall be centrifugal backward
inclined and non-overloading. Wheels shall be balanced in two planes. The wheel blades shall be aerodynamically
designed to minimize turbulence, increase efficiency and reduce noise. The wheel blades
shall be welded to the wheel inlet cone. In the event that balancing weights are required
they shall be riveted to the blades or wheel. The wheel inlet shall overlap the fan base
inlet for maximum performance and efficiency. The wheel shall be firmly attached to the
motor shaft with two set screws. |
|
| Motor & Motor Compartment |
| Standard 115 volt, open drip motors shall be permanently lubricated, rated for
continuous duty and thermally protected. Motors shall be mounted out of the
airstream and furnished at the specified voltage, phase and enclosure. Motor
mounting plate shall be constructed of heavy gauge galvanized steel. The motor
compartment shall be cooled by outside air drawn through an extruded aluminum
conduit tube. To seal the conduit tube passage and prevent noise silicone rubber
grommets shall isolate the conduit tube from the fan housing. The motor compartment
shall be of a two-piece construction with the cap having quick release clips to provide
quick and easy access to the motor compartment.
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|
| Grease Spout |
| A grease spout made of aluminum tubing shall be welded to the fan housing. The
weld shall be factory tested to ensure it will not leak.
|
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| Nylon Washers |
| To provide a tight seal all fasteners in the fan housing shall be backed with nylon washers.
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| Product: Fan shall be model as manufactured by . |
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