FIELD DOCUMENTS AND WORK PLANS 1992-1999

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bearing housing vents and drains; and fittings for properly adding bearing lubricant. Grease lubricated pumping units shall be provided with a means of venting the casing. Oil lubricated units shall be provided with constant level oilers or with sight glasses arranged to indicate operating the static oil levels. 11A-7. BALANCE. All rotating parts shall be accurately machined and shall be in as nearly perfect rotational balance as practicable. Excessive vibration shall be sufficient cause for rejection of the equipment. The mass of the unit and its distribution shall be such that resonance at normal operating speeds is avoided. In any case, the vibration displacement (peak-to-peak) as measured at any point on the machine shall not exceed 4.0 mils. At any operating speed, the ratio of rotation speed to the critical speed of a unit or components thereof shall be less than 0.8 or more than 1 .3. 11A-8. DRIVE UNITS. 11A-8.01. Electric Motors. The motors shall be totally enclosed, fan cooled, rated 480 volts, 60 Hz, three phase and shall conform to the General Equipment Stipulations. The motor shall be furnished with space heater sized to prevent condensation on the core and windings and suitable for a 120 volt, 60 Hz, single phase power supply. Space heater leads shall be brought out through the motor terminal box for wiring in conduit. Motor drivers shall be rated to produce the run-out horsepower requirement without overloading, for the speed and impeller provided. 11A-9. SHOP TESTS. The pump shall be tested at the factory for capacity, power requirements, and efficiency at specified rated head, shutoff head, operating head extremes, and at as many other points as necessary for accurate performance curve plotting. All tests and test reports shall be made in conformity with the requirements and recommendations of the Hydraulic Institute Standards. 11A-10. INSTALLATION. Each pumping unit shall be leveled, plumbed, aligned, and wedged into position to fit connecting piping. Installation procedures shall be as recommended by the pump manufacturer, the Hydraulic Institute Standards, and as required herein. Grouting shall be as specified in the grout section. The pump base shall be grouted after initial fitting and alignment but before final bolting of connecting piping. Special care shall be taken to maintain alignment of pumping unit components. No stresses shall be transmitted to the pump flanges. (MARLEY FSSF ) (CONTRACT NO. 13) 11A-5 (11654.812 )