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   PART 1 - GENERAL

    01 DESCRIPTION OF WORK

    A. Contractor shall provide and install pumps complete with motors, bases, control systems, variable frequency drives, and accessories required for a complete and functional pumping system.

    B. The pump supplier shall supply an entire system that shall include pumps, motors, shafts, bearings, variable frequency drives, control system and all accessories required.

    C. Pump supplier shall bear the responsibility of supplying all equipment required for a complete, operating, automatic wastewater pumping system.

    02 REFERENCES

    A. Hydraulic Institute Standard

    03 PERFORMANCE

    A. Make certain that equipment does not exceed space allocation and provide the manufacturer with Contract Drawings where necessary.

    B. Pumps must operate at specific speeds below the "Upper Limits of Specific Speeds" established by the Hydraulic Institute so that the pumps may operate at the stated capacity, head, and suction lift with reasonable assurance of freedom from cavitation.

    C. Pumps, motors, and control equipment shall conform to the requirements set forth in the following pages as to capacity, head, and other requirements. Motors shall be of ample size to operate without overload through the entire range of the pump characteristic curve. Ample means of lubrication shall be provided for all bearings and parts where required. Alemite industrial type fittings as manufactured by Stewart-Warner Corp., Chicago, Illinois, or approved equal, shall be used for grease lubrication. Pumps and motor shall perform the work intended without undue wear and undue heating.

    D. Centrifugal pumps shall be selected so as not to employ more than 90 percent of the maximum impeller.

    E. Pumps with external moving parts such as couplings, pulleys, belts, etc., shall have factory fabricated, OSHA approved, guards. Pumps with couplings shall have a fabricated steel base.

    F. The base plate design and fabrication shall be by the manufacturer.

    G. Asbestos shall not be in any part of the pumps nor in the seals.

    04 TESTS

    A. Certified copies of the results of the pump performance tests run in the factory on all centrifugal pumps with a capacity over 500 gpm shall be submitted to the Engineer for approval prior to pump delivery. Tests shall be conducted in accordance with the Hydraulic Institute Centrifugal Pumps Test Standards. Notice of the date of the performance tests shall be given the Owner 30 days in advance of the test date. Engineer shall witness the testing of the pumps. Contractor shall include the witness test in his base bid.

    B. Contractor shall provide a vibration field test by an independent testing laboratory after start-up. Tests shall be conducted in accordance with the Hydraulic Institute, Centrifugal Pumps Test Standards. Vibration limits shall be as required by the equipment manufacturer and listed in his shop drawing submittals. Vibration tests shall be conducted on all parts of equipment.

    05 SUBMITTALS

    A. The submittals required in this section include (but are not limited to) the following:

    1. Characteristic pump curves

    2. Materials

    3. Seal descriptions

    4. Impeller diameter

    5. Maximum impeller permissible

    6. NPSH requirements

    7. Operating point

    8. Certified pump test (where required)

    9. Electrical characteristics of motors

    10. Outline dimensions

    11. Vibration Field Test Data Requirements

    B. The Contractor shall submit for approval complete characteristic curves of the pumps he proposes to furnish before fabrication is started, as well as a complete description of the pumps. This description shall include materials of construction for all fluid contact parts, mechanical seals, packing, and shaft. It shall also include the quantity and pressure of seal water, if required. Characteristics of pumps furnished may have a tolerance of 2% in head or capacity above or below requirements specified herein. Curves shall also indicate required npsh, efficiency, horsepower, maximum diameter impeller that can be installed in pump, and proposed impeller diameter for the application. Submittals for positive displacement pumps shall indicate volumetric efficiency, mechanical efficiency, speed and npsh requirements.

   PART 2 - PRODUCTS

    06 CENTRIFUGAL PUMPS, NON-CLOGGING

    A. General:

    1. Four (4) pumps shall be provided as shown. Due to the nature of the project special attention must be given to the hydraulic characteristics of the units. This equipment shall be installed in phases as shown in the Contract Documents.

    2. The new raw sewage pumps shall be of the vertical remote coupled design. The pump will be supported by the pump support plate and/or support legs as designed by the pump manufacturer. It shall be either cast iron or fabricated steel designed to support all operating loads of the pump and drive. The suction fitting shall incorporate an adequately sized hand-hole to allow access for clean-out. The hand-hole cover shall be contoured smoothly with the inner wall of the suction fitting. Pumps shall be mounted on concrete piers as shown on the Contract Drawings. Pump manufacturer shall verify the size required for the concrete piers in the shop drawing submittals.

    3. The motor shall be supported by a floor mounted fabricated steel pedestal designed to handle all operating loads imposed by the drive.

    4. Pumps shall be Goulds or approved equal.

    5. Hydraulic Design Criteria:

    a) Rated Condition - Capacity = 40,000 GPM

    b) Rated Condition - Head = 74 TDH

    c) Rated Condition - Minimum Eff. = 84%

    d) Secondary Design - Capacity = 30,000 GPM

    e) Secondary Design - Head = 105 TDH

    f) Secondary Design - Minimum Eff. = 84%

    g) Operating Range at Maximum Speed = 110 Feet to 64 Feet

    h) Minimum Capacity at Maximum Head = 28,000 GPM

    i) Minimum Capacity at Minimum Head = 44,000 GPM

    j) Motor Horsepower = 1000 HP

    k) Maximum RPM = 590 RPM

    l) Maximum NPSHR = 28 Feet

    B. Pump Materials and Construction:

    1. Casing:

    a) The pump casing shall be constructed of ASTM A48 Class 35 cast iron. The rotating element shall be designed to enable removal without disturbing the suction and discharge piping. The casing shall have a hand-hole of adequate size located for access to the cutwater and impeller vanes for clean-out. The tangential discharge nozzle shall be designed to accept 30 inch ANSI Class 125 lb. flange. The suction cover shall be designed to accept 36 inch ANSI Class 125 lb. flange. The casing shall have registered fits and "O" ring grooves at the suction and volute covers. Sealing between these surfaces will be accomplished with "O" rings. The casing assembly shall be hydrostatically tested to one and one half times the maximum operating pressure.

    2. Impeller:

    a) The impeller shall be of the enclosed mixflow type with three vanes and be a single casting with hand finished flow passages. It shall be capable of passing a minimum diameter sphere of 7 inches. It shall be made of ASTM A48 Class 35 cast iron and be hydraulically and dynamically balanced. The impeller shall have a tapered fit and be keyed to the shaft and locked against forward or reverse rotation with a contoured impeller nut.

    3. Volute Cover/Stuffing Box:

    a) The volute cover shall be constructed of ASTM A48 Class 35 cast iron and shall bolt onto a mating registered fit on the casing.

    It shall have a NPT drain for seal water drainage. A NPT connection for sealing water shall be provided. The cast iron gland shall be split for ease of disassembly/reassembly. The shaft shall be protected in this area by a stainless steel shaft sleeve. The seal shall be balanced, o-ring mounted, split seal Model 221 as manufactured by Chesterton Co., Stoneham, Massachusetts 02180 or approved equal. The seal shall be supplied with carbon 650 rc rotary face, ceramic 995 silica free stationary, viton o-rings, 316 s.s. gland, 316 s.s. rotary, hastelloy c springs. Seal shall withstand 150 psig stuffing box pressure. Seal parts shall be split as required for installation without disassembly of pump.

    4. Pump Shaft and Sleeve:

    a) The pump shaft shall be made of a high quality alloy steel (AISI 4340) and engineered to transmit full driver horsepower with a liberal safety factor and minimum deflection. The shaft shall be protected where it passes thru the stuffing box with an ASTM A296 CA15 stainless steel shaft sleeve. It shall be keyed to the shaft to prevent rotation and shall have a minimum brinell hardness of 400. The sleeve shall be positively sealed to prevent contamination from pumpage or external liquids.

    5. Pump Bearings:

    a) Anti-friction bearings shall be secured in an ASTM A48 Class 35 cast iron bearing frame. The bearing assembly shall be designed for a minimum life of 100,000 hours in accordance with AFBMA. The bearings shall be grease lubricated and provided with accessible grease fitting and relief fittings. Lip type seals shall be provided in the bearing housing and cover to prevent entrance of contaminants. The bearing assembly shall be engineered to adjust the rotating assembly axially, without pump or bearing disassembly. The bearing assembly shall be bolted in a register fit to the volute cover for accurate positioning.

    b) Pumps shall be wired with vibration detectors to signal an alarm at vibration limits in excess of Hydraulic Institute Standards.

    6. Wear Ring:

    a) The impeller and suction cover shall be fitted with replaceable wearing rings. The impeller ring shall be stainless steel ASTM A296 CA15 hardened to 250 brinell. The suction cover ring shall be stainless steel ASTM A296 CA15 hardened to 400 brinell.

    The wear rings shall be of the "L" shape design and adequately fastened or secured in place by stainless steel cap screws.

    7. Intermediate Shafting:

    a) Pumps shall be connected to the drives by intermediate shafting equipped with roller bearing universal joints and self-aligning pillow block type support bearings flanged to mount to intermediate support positions. Intermediate bearings and universal joints shall be equipped with grease fittings.

    b) Intermediate shafting shall not pass through a critical or half-critical speed zones.

    c) Stationary support bearings shall have a minimum B-10 life of 100,000 hours.

    d) Universal joints shall have minimum B-10 life of 50,000 hours.

    e) Intermediate shafting shall be provided with an OSHA approved aluminum shaft guard. Shaft guard shall be hinged and bolted in place as required for access to maintain bearings and joints.

    f) The intermediate shafting connecting the motor to the pump shall be of an assembly consisting of a fiber reinforced epoxy composite torque tube members connected to a flexible U-joint system at each end of the shafting sections. The shafting lengths shall be as required by the pump manufacturer with a intermediate support as shown on the Contract Drawings.

    g) The composite torque tube shall be designed and fabricated utilizing the filament winding process. The tube materials shall be of graphite and/or E-glass fibers in a epoxy resin matrix. The resin shall be corrosion resistant epoxy thermoset plastic. The tube's outer surface shall contain a resin rich thermoplastic layer to provide resistance to impact damage. No holes shall be allowed through the wall of the tube.

    h) The metal to composition connection joint shall be of compression press-fit. It shall provide a torsional strength that is higher than the strength of the composite torque tube. No adhesive joint will be allowed. A thin layer of E-glass fiber reinforced epoxy shall be placed between the end fittings' stub and the tube inner surface to provide galvanic corrosion protection.

    i) The intermediate shafting assembly shall be capable of withstanding the applied torque produced by the motor.

    j) The intermediate shafting assembly shall be designed with a safety margin of no less than 2 over the expected peak motor torque.

    k) The intermediate shafting assembly shall be designed to operate below its critical speed at all times. The installed assembly shall possess a critical frequency which is greater than the highest excitation frequency. The safety factory for critical speed shall be no less than 25% (SF = 1.25 min.).

    l) The intermediate shafting shall be capable of operating in an environment of:

    1) Temperature: 110 degrees C

    2) Relative Humidity: 100% RH

    C. Lateral Analysis:

    1. The pump manufacturer shall perform a lateral dynamic analysis in the preconstruction stage to determine the natural frequencies of the equipment in the lateral mode and to verify that they are a sufficient margin away from the operating speed (or speed range if variable speed).

    2. The lateral dynamic analysis model shall be performed using finite element analysis methods. The model shall consider the characteristics of any structural component or mass as necessary to allow the determination of the natural frequency characteristics of the equipment including the motor and pump reed frequencies, the first rotor critical speed, and other critical speeds or natural frequencies of interest which are closest to the operating speed. If the model is sensitive to foundation rigidity these effects shall be considered, and included in the analysis model.

    3. Intermediate shafting critical speed data shall be obtained from the shafting manufacturer and incorporated into the model.

    4. Motor Reed frequency and rotor critical speed information shall be incorporated into the model. If the accuracy of the motor Reed frequency cannot be demonstrated to the pump manufacturer by previous impact test results on similar units, a finite element analysis shall be conducted by the motor manufacturer to determine the motor Reed frequency, as well as rotor critical speeds and any other pertinent natural frequencies which shall be incorporated into the analysis model by the pump manufacturer. There shall be no resulting natural frequency within plus or minus 25% of an operating speed, as indicated by the resulting analysis.

    5. A complete dynamic analysis report shall be submitted to the

    Engineer in the preconstruction stage, and shall include the following information:

    a) Computer program used.

    b) Schematic diagram of the model depicting nodes and elements.

    c) Input data consisting of node coordinates, element types, material properties, element characteristics, element connectivities, and specified displacements.

    d) Motor Reed critical frequency and critical speed information or motor dynamic analysis, if required.

    e) Intermediate shafting critical speed information, as submitted

    by the shafting manufacturer.

    f) Analysis results including all significant natural frequencies.

    g) Interpretation of results.

    D. Spare Parts: Provide the following spare parts for each pump.

    1. Impeller

    2. Split seal (2 sets)

    3. Gaskets and O-rings (2 sets)

    4. Universal joints (4 sets)

    5. Steady bearings (2 sets)

    6. Wear ring (2 sets)

    7. Pressure gages (2 sets)

    E. Acceptable Manufacturers

    1. Goulds

    2. Allis Chalmers

    3. K.S.B.

    4. Worthington

    2.02 SUMP PUMPS (DRY WELL SUMP)

    A. Materials: The following materials shall be used in the construction of the pumps:

    Casing Cast Iron

    Impeller Cast Iron

    Shafts 416 Stainless Steel

    Seals Tandem Mechanical

    Hardware 302 Stainless Steel

    Guide Rails Stainless Steel

    B. Construction:

    1. Pump shall be bottom suction submersible type with non-clog impellers capable of passing solids and fibrous materials. Impeller shall be of semi-open design, keyed and bolted to the motor shaft.

    2. All electrical parts shall be housed in an air-filled cast iron, water-tight enclosure. Enclosure shall be sealed by use of O-rings. Cable leads shall be epoxy sealed.

    3. Two moisture sensing probes shall be located between the mechanical seals to detect any influx of moisture past the outer seal.

    4. Thermostats shall be installed in adjacent phases of the motor winding to provide overheating protection. Thermostats shall be automatic reset, normally closed. Thermostats shall be connectable externally to the holding coil of the magnetic starter.

    5. Lifting eyes shall be cast into the motor housing and of adequate strength to lift the entire unit.

    6. Pumps shall be provided with guide rails for removal.

    B. Motors:

    1. The pump motor shall be induction type with a squirrel cage rotor, shell type design, housed in an air filled, watertight chamber, NEMA B design. The stator windings and stator leads shall be insulated with moisture resistant Class F insulation rated for 311°F. The stator shall be dipped and baked three times in Class F varnish and heat shrink fitted into the stator housing. The use of bolts, pins and other fasting devices requiring penetration of the stator housing is not acceptable. The pump motor shall be designed for continuous duty handling pumped media of 104°F and capable of up to 15 starts per hour.

    2. Thermal switches set to open at 260°F shall be embedded in the stator lead coils to monitor the temperature of each phase winding. These switches shall be used in conjunction with and supplemental to external motor overload protection.

    3. The cable entry seal design and motor housing design shall insure a watertight and submersible seal at all required head conditions to maximum of 65 feet.

    4. Wire nuts or crimping type connection devices are not acceptable.

    5. The pump and motor shall be manufactured by the same manufacturer.

    The motor shall be of adequate horsepower to assure a non-overloading condition through the entire pump performance curve from shut-off to run out. Motor shall be rated at 480 volt, 3 phase, 60 Hertz.

    6. The combined service factor shall be a minimum of 1.15. The motor shall be designed for operation at up to 104°F ambient and with a temperature rise not to exceed 176°F.

    7. The power cable shall be sized according to N.E.C. and ICEA Standards and shall be of sufficient length to reach the junction box without need for any splices.

    C. Controls:

    1. The pump manufacturer shall provide a pump control system to maintain a minimum water level in the sump, alternate the pumps to maintain similar run times, and alarm at the following conditions:

    a) System short circuit

    b) Motor overload

    c) Motor overtemperature

    d) Low level alarm

    e) High level alarm

    2. The control panel shall be rated NEMA 4R and shall have the following items:

    a) Motor starters for pumps

    b) Indication lights for running, overload, overtemperature for each pump

    c) Indication lights for low and high liquid levels

    d) Pump run time meters

    3. The liquid levels shall be measured and controlled with submersible transducer installed in the sump.

    4. The control system shall have dry contacts for the telemetry system for the following points:

    a) High liquid level

    b) Pump No. 1 running

    c) Pump No. 2 running

    d) Pump fault No. 1

    e) Pump fault No. 2

    D. Spare Parts: Provide the following spare parts for each pump:

    1. Two tandem mechanical seals

    2. Two sets of gaskets

    E. Performance: Two (2) drywell sump pumps shall be provided that are capable of pumping a flow of 200 gpm each at a total dynamic head of 45 feet. Pump speed shall not exceed 1750 rpm. Minimum efficiency 37%.

    F. Manufacturer: Pumps shall be Model HSU by Goulds or approved equal.

    2.02 SUMP PUMPS

    A. Materials:

    1. Casing Cast Iron

    2. Impeller Cast Iron

    3. Hardware 316 Stainless Steel

    B. Construction:

    1. Pump shall be bottom suction type capable of passing 5/8-inch solids. Impeller shall be of vortex design. Pump discharge shall be 1-1/2" NPT.

    2. Pump shall be equipped with float actuated submersible (NEMA 6) mechanical switch and automatic thermal overload protection.

    3. All screws, bolts, float rod, handle, guard, and arm and seal assembly shall be of stainless steel.

    C. Motor:

    1. The pump motor shall be induction type with a squirrel cage rotor, shell type design, housed in an air filled, watertight chamber, NEMA B design. The stator windings and stator leads shall be insulated with moisture resistant Class F insulation rated for 311°F. The stator shall be dipped and baked three times in Class F varnish and heat shrink fitted into the stator housing. The use of bolts, pins and other fasting devices requiring penetration of the stator housing is not acceptable. The pump motor shall be designed for continuous duty handling pumped media of 104°F and capable of up to 15 starts per hour.

    2. Thermal switches set to open at 260°F shall be embedded in the stator lead coils to monitor the temperature of each phase winding. These switches shall be used in conjunction with and supplemental to external motor overload protection.

    3. The cable entry seal design and motor housing design shall insure a watertight and submersible seal at all required head conditions to maximum of 65 feet.

    4. Wire nuts or crimping type connection devices are not acceptable.

    5. The pump and motor shall be manufactured by the same manufacturer. The motor shall be of adequate horsepower to assure a non-overloading condition through the entire pump performance curve from shut-off to run out. Motor shall be rated at 480 volt, 3 phase, 60 Hertz.

    6. The combined service factor shall be a minimum of 1.15. The motor shall be designed for operation at up to 104°F ambient and with a temperature rise not to exceed 176°F.

    7. The power cable shall be sized according to N.E.C. and ICEA Standards and shall be of sufficient length to reach the junction box without need for any splices.

    D. Performance: Five (5) sump pumps shall be provided that shall be capable of pumping a flow of 65 gpm at a total dynamic head of 15 feet.

    E. Manufacturer: Pump shall be Series No. 137 by Zoeller Company or approved equal.

    2.03 PROTECTED WATER SYSTEM

    A. There shall be furnished and installed where shown on the contract drawings a complete and operating protected water system consisting of the following major components:

    1. Protected water tank with stilling well

    2. Inlet piping with bypass fill valve

    3. Inlet float control valve

    4. Pressure relief valve and pressure by-pass piping

    5. Pressure gauges

    6. Discharge piping

    7. Duplex pumps and motors

    8. Control panel, level alarm and low pressure alarm

    B. Protected Water Tank:

    1. Tank shall be 30" diameter by 42" deep. It shall be constructed of 10 gage thick wall and 1/4" thick bottom, 304 stainless steel.

    2. It shall be reinforced at the rim and mid section with 1-1/2 x 1-1/2 x 1/4" angle (304 stainless steel) and shall have two 2" x 2" x 1/4" angle stiffeners (304 stainless steel) across the bottom of the tank which protrude to one side for mounting of the pumps.

    3. Tank will be equipped with four legs (304 stainless steel) to stand the tank a minimum of 6" above the floor.

    4. There shall be a 1-1/2" IPT overflow at the top of the tank, a 3/4" IPT drain with valve at the bottom of the tank and 1 - 1-1/2" IPT pump suction connection and a 1-1/2" IPT by-pass connection located as required to match up with the centerline of the pumps. Tank shall be equipped with a fiberglass cover and float stilling well (304 stainless steel).

    C. Inlet Piping and Bypass Fill Valve:

    1. Inlet piping shall be mounted over the top of the tank and arranged so that it will meet with the regulations of the Metropolitan Codes Department for air gap requirements. Inlet piping shall have an automatic diaphragm type float valve and also be furnished with a 1-1/2" gate valve for manual filling of the tank.

    Pipe shall be 1-1/2" copper. All piping shall be insulated (refer to Section 15430, Plumbing Piping Insulation).

    D. Inlet Valve:

    1. This valve shall be a 1-1/2", IPT hydraulically operated, diaphragm-actuated, globe or angle pattern valve. It shall contain a resilient, synthetic rubber disc, having a rectangular cross-section, contained on three and one-half sides by a disc retainer and forming a tight seal against a single removable seat insert. The diaphragm assembly containing a valve stem shall be fully guided at both ends by a bearing int he valve cover and an integral bearing int he valve seat. This diaphragm assembly shall be the only moving part and shall form a sealed chamber in the upper portion of the valve, separating operating pressure from line pressure. The diaphragm shall consist of nylon fabric bonded with synthetic rubber and shall not be used as a seating surface. Packing glands and/or stuffing boxes are not permitted and there shall be no pistons operating the valve or pilot controls. All necessary repairs shall be possible without removing valve from the line.

    2. Operation: Valve shall open wide when float is at low liquid level and close drip tight when float is at high liquid level.

    3. Valve shall be similar in all respects to the 124-01 float valve as manufactured by Cla-Val Company of Newport Beach, California or approved equal.

    E. Pressure Relief Valve Bypass Piping:

    1. There shall be furnished on the discharge of each protected water pump a pressure relief valve which will return excess water to the protected water tank. This relief system shall have the necessary check valves and gate valves to completely isolate the pumps for maintenance and prevent reverse flow when one pump is operating and the other is in standby mode. Piping shall be 1-1/2" copper.

    2. Pressure relief valve shall be hydraulically or pneumatically operated, diaphragm actuated globe valve. It shall be direct-acting, adjustable, spring loaded, and designed to permit flow when pressure exceeds the spring setting. It shall have a single removable seat and a resilient disc and shall be without external packing glands. Disc shall be synthetic rubber and have a rectangular cross-section contained on three and one-half sides by a disc retainer. This valve shall be similar in all respects to the Model 55F Pressure Relief Valve as manufactured by Cla Val Company, Newport Beach, California or approved equal.

    F. Pressure Gauges:

    1. Each pump shall be equipped with a 3" Bourdon Type pressure gauge on the discharge piping. This gauge shall be for 1/4" piping and shall be equipped with a petcock and a pulsation snubber.

    G. Discharge Piping:

    1. Discharge piping shall be 1-1/2" copper. All piping shall be insulated (refer to Section 15430, Plumbing Pipe Insulation). It shall be equipped with the necessary gate valves and check valves to isolate one pump from the other and prevent reverse flow when one pump is operating and the other is in standby.

    2. Discharge piping shall have the necessary tees to accommodate a pressure switches for indicating high and low system pressure alarm as well as discharge pressure gauges.

    H. Protected Water Pumps and Motors:

    1. There shall be furnished two (2) protected water pumps and motors.

    2. Pumps shall be horizontal vertical split case Turbine pumps rated to deliver 16 GPM against a 115' TDH and as further described below.

    3. Pumps will be equipped with a 1-1/4" discharge and 1-1/2" suction. The suctions will have 20 mesh brass strainers which are to be removable for cleaning without disturbing the piping. Pumps will have bronze impellers, Class 30 cast iron housings and be equipped with mechanical seals. Pumps shall be Model EC7M as manufactured by Burks Pump or approved equal.

    4. Pumps will be mounted on a channel steel base and flexible coupled to a horizontal squirrel cage motor. Motors shall be 2 H.P., 1750 RPM. Totally enclosed fan cooled. Motors shall be non-overloading at any point on the pump curve. Motors shall have a 1.15 service factor.

    I. Control Panel:

    1. There shall be furnished a duplex control panel consisting of two motor circuit breakers, one control voltage circuit breaker, one control voltage transformer, two magnetic across the line motor NEMA rated starters with overload protection and resets, H-O-A switches, elapsed time indicators, pump run lights, alarm lights, 7-day clock for alternation of the pumps and 0-60 second timers for pump failure transfer and alarm.

    2. The panel shall be built in a NEMA 4 x enclosure.

    3. Panel shall be furnished with legs (304 stainless steel) and mounted on the protected water system.

    4. It shall have an alarm circuit included that when the pump pressure on the operating pump drops to a preset low pressure a timer starts. If the pressure does not restore in a preset time the standby pump starts and an alarm is indicated on the control panel. This alarm light remains illuminated until manually reset when the malfunction is corrected. Should the pressure still not be satisfied after the standby pump is started the alarm will be sent to the main control panel and in turn to the telemetry system. Timers will have a range of 0-60 seconds.

    5. Alternation will be by means of a seven (7) day pin type timer.

    6. The tank will also be equipped with a probe type level sensor which will indicate high and low level in the protected water tank. Should the tank be in an overflow condition or low water condition an alarm is sent to the control panel and an alarm light is illuminated. At the same time this alarm is sent to the main control panel and signals the telemetry system.

    7. Panel will be designed to operate on 460 volt, 3 phase, 60 Hertz current with 115 volt control voltage.

    8. The above system shall be completely assembled and piped whereby the contractor matches with a face point at the top of the tank with a 1-1/2" copper water supply and at a common 1-1/2" copper discharge to the wastewater pumps. This face point is at the edge of the tank for the supply and at the edge of the protected water pump base for the discharge. All piping shall be insulated (refer to Section 15430, Plumbing Pipe Insulation).

    9. All wiring between the pumps, pressure switches, and level controls will be completed by the manufacturer. Contractor will terminate in the control panel consisting of main power for pumps, interlocking circuits for wastewater pumps and alarms to the main control panel.

    J. Protected water system shall be Model WD107D as manufactured by Southern Sales Company, Inc.

    K. The protected water system shall be installed as recommended by the manufacturer. The Contractor shall provide startup assistance of the manufacturer for a minimum of one (1) day's service for startup and training.

   PART 3 - EXECUTION

    07 INSTALLATION

    A. Examination:

    1. Examine areas, equipment foundations, and conditions with Installer present, for compliance with requirements for installation and other conditions affecting performance of pumps. Do not proceed with installation until unsatisfactory conditions have been corrected.

    2. Examine rough-in for piping systems to verify actual locations of piping connections prior to installation.

    B. Equipment Bases:

    1. Construct concrete equipment pads as follows:

    a) Form concrete pads by using framing lumber with form release compounds. Chamfer top edge and corners of pad.

    b) Install reinforcing bars, tied to frame, and place anchor bolts and sleeves using manufacturer's installation template.

    c) Place concrete and allow to cure before installation of pumps. Use Portland Cement conforming to ASTM C150, 4,000 psi compressive strength, and normal weight aggregate.

    B. Installation:

    1. General: Comply with the manufacturer's written installation and alignment instructions.

    a) Support pumps and piping separately so that the weight of the piping system does not rest on the pump.

    b) Support pump base plate on rectangular metal blocks and shims, or on metal wedges having a small taper, at points near the foundation bolts to provide a gap of 3/4 to 1-1/2 inches between the pump base and the foundation for grouting.

    c) Adjust the metal supports or wedges until the shafts of the pump and driver are level. Check the coupling faces and suction and discharge flanges of the pump to verify that they are level and plumb.

    C. Alignment:

    1. Align pump and motor shafts and piping connections after setting on foundations, after grout has been set and foundations bolts have been tightened, and after piping connections have been made.

    a) Adjust alignment of pump and motor shafts for angular and parallel alignment by one of the two methods specified in the Hydraulic Institute "Centrifugal Pumps - Instructions for Installation, Operation and Maintenance."

    2. After alignment is correct, tighten the foundation bolts evenly but not too firmly. Fill the base plate completely with non-shrink, nonmetallic grout, with metal blocks and shims or wedges in place. After grout has cured, fully tighten foundation bolts.

    a) Alignment tolerances shall meet manufacturer's recommendations.

    b) Install protected water supply in accordance with the drawings.

    D. Connections:

    1. Install pressure gages on the suction and discharge of each pump at the integral pressure gage tappings provided.

    2. Electrical wiring and connections are specified in Division 16 sections.

    3. Control wiring and connections are specified in other sections.

    E. Field Quantity Control:

    1. Check suction lines connections for tightness to avoid drawing air into the pump.

    F. Commissioning:

    1. Final Checks Before Start-Up: Perform the following preventative maintenance operations and checks before start-up:

    a) Lubricate oil-lubricated bearings.

    b) Remove grease-lubricated bearing covers and flush the bearings with kerosene and thoroughly clean.

    Fill with new lubricant in accordance with the manufacturer's recommendations.

    c) Disconnect coupling and check motor for proper rotation. Rotation shall match direction of rotation marked on pump casing.

    d) Check that pump is free to rotate by hand. For pumps handling hot liquids, pump shall be free to rotate with the pump hot and cold. If the pump is bound or even drags slightly, do not operate the pump until the cause of the trouble is determined and corrected.

    2. Staring procedure for pumps with shutoff power not exceeding the safe motor power:

    a) Prime the pump, opening the suction valve, closing the drains, and prepare the pump for operation.

    b) Open the valve in the cooling water supply to the bearings where applicable.

    c) Open the cooling water supply valve if the stuffing boxes are water cooled.

    d) Open the sealing liquid supply valve if the pump is so fitted.

    e) Open the recirculating line valve if the pump should not be operated against dead shutoff.

    f) Start motor.

    g) Open the discharge valve slowly.

    h) Observe the leakage from the stuffing boxes and adjust the sealing liquid valve for proper flow to ensure the lubrication of the packing. Do not tighten the gland immediately, but let the packing run in before reducing the leakage through the stuffing boxes.

    i) Check the general mechanical operation of the pump and motor.

    j) Close the recirculating line valve once there is sufficient flow through the pump to prevent overheating.

    3. If the pump is to be started against a closed check valve with the discharge gate valve open, the steps are the same except that the discharge gate valve is opened some time before the motor is started.

    3.02 MANUFACTURER'S SERVICES

    A. All manufacturer's visits to pump station prior to start-up shall be the responsibility of the Contractor. At any time within a six-month period, subsequent to completion of start-up, the Contractor, at the request of the Owner, shall furnish the Owner with services of equipment manufacturer's representatives on the site for a period of 2 man-days for each pumping system and intermediate pump shafting pumps shall not be started prior to certification by manufacturer's.

    B. Contract lump sum prices shall include the furnishing of all said services. Furthermore, said services shall be additional to those furnished in connection with equipment erection, installation, testing and the correction of deficiencies. Services provided shall consist of furnishing detailed instructions to personnel of the Owner regarding equipment operation and maintenance after personnel of the Owner have had an opportunity to become familiar with pump station facility equipment.

    3.03 INSTRUCTION MANUALS

    A. Contractor shall furnish, prior to initial testing, twelve copies of an indexed maintenance manual composed of suppliers' maintenance manuals on all equipment and suppliers' brochures on all specialty equipment, including performance curves with size, model, figure number, etc., indicated to identify unit furnished. Maintenance manuals are to be of a hardback, loose-leaf type and of a durable quality. Manuals are to be for the specific equipment provided. Manuals describing general equipment lines will not be accepted.

    B. Each set is to include the following:

    1. Manufacturer's parts list identified with the make, model and serial number of the equipment furnished.

    2. Control and wiring diagrams.

    3. Installation, operation, lubrication and maintenance instructions.

    4. Manufacturer's recommended spare parts lists.

    C. If an Owner's Representative is assigned to the project either through the Owner or the Engineer, the Contractor(s) shall make a copy of all instruction manuals available to the Representative. Manuals on specific items shall be available prior to installation of the item. This requirement in no way relieves the Contractor of his other responsibilities.

    END OF SECTION