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SAMSON OCEANFRONT PARK <br />CITY OF SUNNY ISLES <br />TECHNICAL SPECIFICATIONS <br />COMMON MOTOR REQUIREMENTS FOR HVAC EQUIPMENT 15058-2 <br /> <br /> <br /> <br /> <br /> <br />H. Temperature Rise: Match insulation rating. <br />I. Insulation: Class F. <br />J. Code Letter Designation: <br />1. Motors 15 HP and Larger: NEMA starting Code F or Code G. <br />2. Motors Smaller than 15 HP: Manufacturer's standard starting characteristic. <br />K. Enclosure Material: Cast iron for motor frame sizes 324T and larger; rolled steel for motor frame sizes <br />smaller than 324T. <br /> <br />2.04 <br /> <br />POLYPHASE MOTORS WITH ADDITIONAL REQUIREMENTS: <br />A. Motors Used with Reduced-Voltage and Multispeed Controllers: Match wiring connection <br />requirements for controller with required motor leads. Provide terminals in motor terminal box, <br />suited to control method. <br /> <br />B. Motors Used with Variable Frequency Controllers: Ratings, characteristics, and features \ <br />coordinated with and approved by controller manufacturer. <br />1. Windings: Copper magnet wire with moisture-resistant insulation varnish, designed and tested <br />to resist transient spikes, high frequencies, and short time rise pulses produced by pulse-width <br />modulated inverters. <br />2. Energy- and Premium-Efficient Motors: Class B temperature rise; Class F insulation. <br />3. Inverter-Duty Motors: Class F temperature rise; Class H insulation. <br />4. Thermal Protection: Comply with NEMA MG 1 requirements for thermally protected motors. <br /> <br />2.05 <br /> <br />SINGLE-PHASE MOTORS: <br />A. Motors larger than 1/20 hp shall be one of the following, to suit starting torque and requirements <br />of specific motor application: <br />1. Permanent-split capacitor. <br />2. Split phase. <br />3. Capacitor start, inductor run. <br />4. Capacitor start, capacitor run. <br />B. Multispeed Motors: Variable-torque, permanent-split-capacitor type. <br /> <br />C. Bearings: Prelubricated, antifriction ball bearings or sleeve bearings suitable for radial and thrust <br />loading. <br />D. Motors 1/20 HP and Smaller: Shaded-pole type. <br />E. Thermal Protection: Internal protection to automatically open power supply circuit to motor when <br />winding temperature exceeds a safe value calibrated to temperature rating of motor insulation. <br />Thermal-protection device shall automatically reset when motor temperature returns to normal <br />range. <br />PART 3 - EXECUTION (Not Applicable) <br />END OF SECTION