A-A-50548
3.6.5.3 Motor starter. The starter control shall be manual or magnetic as specified (see 7.2), applicable NEMA type with thermal overload protection of the size and capacity suitable for the required service outlined in NEMA ICS 1 and NEMA ICS 2. The control enclosure shall be as required by NEMA ICS 6 and shall be as specified (see 7.2).
3.7 Guards.
3.7.1 Inlet guard. Unless otherwise specified (see 7.2), the type I and type III fans shall be provided with an air-inlet screen guard of heavy gage galvanized wire. The meshes of the screen guard shall not be greater than two inches square and not less than 1/2 inch (12.7 mm) square. If required to facilitate removal, the screen shall be split construction.
3.7.2 V-belt guard. A protective guard of heavy gage wire or sheet metal shall be mounted to the fan unit to prevent objects from being jammed between the belts and sheaves.
3.7.3 Shaft and coupling guard. A protective guard of heavy gage wire or sheet metal shall be mounted on the fan unit to completely enclose the motor shaft, coupling, and fan shaft.
3.7.4 Bearing-cooling fan guard. When a bearing-cooling fan is supplied (see 3.6.3.1), a protective guard of heavy gage wire mesh shall be mounted on the fan unit to completely enclose the bearing-cooling fan.
3.8 Lifting attachments. When specified (see 7.2), suitable lifting attachment plate(s) shall be provided to enable the equipment to be lifted in its normal position. Attachment eye(s) shall be not less than three inches in diameter, and plate(s) shall withstand any handling conditions encountered, such as rapid lowering and braking of the load. When practicable, only one attachment shall be used. Where more than one attachment is required, each attachment, when practicable, shall be of sufficient capacity to carry the total weight. A copper or zinc-base-alloy or aluminum plate securely fastened to the unit shall indicate diagrammatically the lifting capacity of each attachment.
3.9 Lubrication. Unless otherwise specified (see 7.2), means for lubricating shall be provided in accordance with the manufacturer’s standard practice. Parts requiring lubrication shall be so located as to make the lubricating points easily visible and accessible. All parts requiring lubrication shall be properly lubricated before delivery. Manufacturer’s standard means for pressure lubrication shall be provided.
3.10 Cleaning, treatment, and painting. Surfaces normally painted in good commercial practice shall be cleaned, treated, and painted as specified herein. Surfaces to be painted shall be cleaned and dried to insure that they are free from contaminants such as oil, grease, welding slag and splatter, loose mill scale, water, dirt, corrosion product, or any other contaminating substances. As soon as practicable after cleaning, and before any corrosion products or other contamination can result, the surfaces shall be prepared or treated to insure the adhesion the adhesion of the coating system. The painting shall consist of at least one coat of primer and one finish coat. The primer shall be applied to a clean dry surface as soon as practicable after cleaning and treating. Painting shall be with manufacturer’s current materials according to manufacturer’s
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