Specifications include, but are not limited to: replacement of HVAC equipment serving multiple areas throughout the school, as well as associated electrical and structural modifications.; MOTOR REQUIREMENTS FOR HVAC AND PLUMBING EQUIP: A. Electrical Service, General. See drawings for specific details: 1. Motors 1/2 HP and Smaller: 115 volts, single phase, 60 Hz.; 2. Motors Larger than 1/2 Horsepower: 460 volts, 230 volts, or 208 volts (see schedules), three phase, 60 Hz.; B. Construction: 1. Open drip-proof type except where specifically noted otherwise.; 2. Design for continuous operation in 40 degrees C environment.; 3. Design for temperature rise in accordance with NEMA MG 1 limits for insulation class, service factor, and motor enclosure type.; 4. Motors with frame sizes 254T and larger: Premium Efficiency Type.; C. Explosion-Proof Motors: UL approved and labelled for hazard classification, with over temperature protection.; D. Visible Nameplate: Indicating motor horsepower, voltage, phase, cycles, RPM, full load amps, locked rotor amps, frame size, manufacturer's name and model number, service factor, power factor.; E. Wiring Terminations: 1. Provide terminal lugs to match branch circuit conductor quantities, sizes, and materials indicated. Enclose terminal lugs in terminal box sized to NFPA 70, threaded for conduit.; 2. For fractional horsepower motors where connection is made directly, provide conduit connection in end frame.; VIBRATION AND SEISMIC CON. FOR HVAC AND PLUMB, PIPING AND EQUIP.: A. Install in accordance with manufacturer's instructions.; B. Bases: 1. Set steel bases for one inch clearance between housekeeping pad and base.; 2. Set concrete inertia bases for 2 inches clearance between housekeeping pad and base.; 3. Adjust equipment level.; C. On closed spring isolators, adjust so side stabilizers are clear under normal operating conditions.; D. Prior to making piping connections to equipment with operating weights substantially different from installed weights, block up equipment with temporary shims to final height. When full load is applied, adjust isolators to load to allow shim removal.; E. Provide pairs of horizontal limit springs on fans with more than 6.0 inches WC static pressure, and on hanger supported, horizontally mounted axial fans.; F. Provide seismic snubbers for all equipment, piping, and ductwork mounted on isolators. Each inertia base shall have minimum of four seismic snubbers located close to isolators. Snub equipment designated for post-disaster use to 0.05 inch maximum clearance. Other snubbers shall have clearance between 0.15 inch and 0.25 inch.; G. Support piping connections to equipment mounted on isolators using isolators or resilient hangers as follows: 1. Up to 4 Inches Pipe Size: First three points of support.; 2. 5 to 8 Inches Pipe Size: First four points of support.; 3. 10 inches Pipe Size and Over: First six points of support.; 4. Select three hangers closest to vibration source for minimum 1.0 inch static deflection or static deflection of isolated equipment. Select remaining isolators for minimum 1.0 inch static deflection or 1/2 static deflection of isolated equipment
