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Orange County Architectural Renovations Smith Sinnett / 2023036 <br />Hillsborough, NC Orange County Asset Management Services <br />HYDRAULIC ELEVATORS 14 24 00 - 5 <br />F. Buffers: Provide substantial buffers in the elevator pit. Mount buffers on a steel template that is fastened to the <br />pit floor or continuous channels fastened to the elevator guide rail or securely anchored to the pit floor. Provide <br />extensions if required by project conditions. <br />G. Automatic Self-Leveling: Provide each elevator car with a self-leveling feature to automatically bring the car to the <br />landings and correct for overtravel or undertravel. Self-leveling shall, within its zone, be automatic and independent <br />of the operating device. The car shall be maintained approximately level with the landing irrespective of its load. <br />H. Wiring, Piping, and Oil: Provide all necessary hoistway wiring in accordance with the National Electrical Code. All <br />necessary code compliant pipe and fittings shall be provided to connect the power unit to the jack unit. Provide <br />proper grade readily biodegradable oil as specified by the manufacturer of the power unit (see Power Unit section <br />2.04.G for further details) <br />I. Inserts: Furnish required concrete and masonry inserts and similar anchorage devices for installing guide rails, <br />machinery, and other components of elevator work where installation of devices is specified in another Section. <br />2.5 POWER UNIT <br />A. The below is to govern as standard of quality where components are not explicitly described in the exhibits provided. <br />B. Power Units (Oil Pumping and Control Mechanism): A self-contained unit consisting of the following items: <br />1. Oil reservoir with tank cover. <br />2. An oil hydraulic pump. <br />3. An electric motor. <br />4. Oil control valve with the following components built into single housing; high pressure relief valve, check <br />valve, automatic unloading up start valve, lowering and leveling valve, and electro-magnetic controlling <br />solenoids. <br />C. Pump: Positive displacement type pump specifically manufactured for oil-hydraulic elevator service. Pump shall be <br />designed for steady discharge with minimum pulsation to give smooth and quiet operation. Output of pump shall not <br />vary more than 10 percent between no load and full load on the elevator car. <br />D. Motor: Standard manufacture motor specifically designed for oil-hydraulic elevator service. Duty rating shall be <br />selected for specified speed and load. <br />E. Control System: Shall be microprocessor based and protected from environmental extremes and excessive vibrations <br />in a NEMA 1 enclosure. <br />F. Oil Control Unit: The following components shall be built into a single housing. Welded manifolds with separate <br />valves to accomplish each function are not acceptable. Adjustments shall be accessible and be made without <br />removing the assembly from the oil line. <br />1. Relief valve shall be externally adjustable and be capable of bypassing the total oil flow without increasing <br />back pressure more than 10 percent above that required to barely open the valve. <br />2. Up start and stop valve shall be adjustable and designed to bypass oil flow during start and stop of motor <br />pump assembly. Valve shall close slowly, gradually diverting oil to or from the jack unit, ensuring smooth up <br />starts and up stops. <br />3. Check valve shall be designed to close quietly without permitting any perceptible reverse flow. <br />4. Lowering valve and leveling valve shall be adjustable for down start speed, lowering speed, leveling speed <br />and stopping speed to ensure smooth "down" starts and stops. The leveling valve shall be designed to level <br />the car to the floor in the direction the car is traveling after slowdown is initiated. <br />G. Solid State Starting: Provide an electronic starter featuring adjustable starting currents. <br />H. Provide integral overcurrent protective device with shunt trip capability. <br />I. Hydraulic Fluid: Nontoxic, readily biodegradable made from vegetable oil with antioxidant, anticorrosive, <br />antifoaming, and metal-passivating additives. Hydraulic fluid is approved by elevator manufacturer for use with <br />elevator equipment. <br />1. Product: Subject to compliance with requirements, provide Oil Type: USDA certified biobased product, <br />ultra-low toxicity, readily biodegradable, energy efficient, high performing fluid made <br />Docusign Envelope ID: 52FACC74-DA96-491B-B0B8-04AC3961737D