74-1.01 general · web viewif drainage pump and pumping plant electrical equipment require changes...

74 PUMPING EQUIPMENT AND CONTROLS74-1 GENERAL

74-1.01 GENERAL74-1.01A SummarySection 74-1 includes general specifications for installing pumping equipment and the control systems.

74-1.01B DefinitionsReserved

74-1.01C Submittals74-1.01C(1) GeneralIf you use the drainage pumps to maintain total pumping capacity before Contract acceptance, submit:

1. Shop drawings for drainage inlet bulkhead and safeguards2. Maintenance work plan

74-1.01C(2) Shop DrawingsPlans and detail drawings may be 22 by 34 inches.

Shop drawings for pumping equipment must include:

1. System layout2. Piping connections3. Appurtenances4. Other materials required for the equipment installation5. Mounting details and anchorage details

Shop drawings for electrical equipment must include:

1. Electrical equipment schematics2. Control diagrams3. Wiring diagrams4. Conductor numbers for control and power conductors

Do not use project plan reproductions or manufacturer's standard printed data for electrical layout drawings.

Submit shop drawings for the installation of drainage pump equipment and pumping plant electrical equipment after product data submittals are authorized.

If drainage pump and pumping plant electrical equipment require changes to pump plant metal work or other construction details, submit revised shop drawings.

74-1.01C(3) Product DataSubmit at least 5 copies of product data. Each copy must be bound together and include an index stating equipment names, manufacturers, and model numbers. Two copies will be returned.

Product data must include:

1. Catalog cuts including:1,1. Manufacturer's name1,2. Catalog or part number1.3. Size1.4. Capacity1.5. Electrical ratings1.6. Finish1.7. Maintenance and adjustment requirements1.8. Identification symbols described

2. Performance data3. Installation instructions

74-1.01C(4) SamplesThe Engineer may request material samples of submitted equipment.

74-1.01C(5) Work Plans74-1.01C(5)(a) GeneralReserved

74-1.01C(5)(b) Performance Testing PlanSubmit a work plan for performance testing of pumping plant equipment. The work plan must include methods for:

1. Blocking pipes at their entrance point into the storage box2. Removing all debris from the pumping plant, storage box, debris sump and pump sump before testing3. Locating and installing bulkheads in the storage boxes, if used4. Operational test, including pump controller operation5. Supplying water6. Water disposal

74-1.01C(5)(c) Maintain Pumping Capacity and Maintenance Requirements PlanSubmit a work plan for maintaining the existing pumping plant total pumping capacity and maintaining the pumping plant as specified in section 74-1.03E. The work plan must include:

1. Pumping plant maintenance procedures and schedule.2. Total pumping capacity alternative specified in section 74-1.03E.3. Proposed pumping equipment. If using alternative 2 or 3 specified in section 74-1.03E, include

auxiliary pump curves, equipment ratings, quantity, and power supply.4. Method for water disposal.

74-1.01C(6) Maintenance and Operation Manual SubmittalsSubmit a maintenance and operations manual before completion of the work. Submit 1 copy of pdf files on a CD or DVD and 2 copies in print format in 3-ring binders with tabbed dividers. The manual must include all accepted action submittals for drainage pump equipment and pumping plant electrical equipment. Organize each binder as follows:

1. Index 2. Part lists3. Operating instructions4. Maintenance instructions5. Wiring schematics, with control and power conductor numbers identified6. Certified pump curves

Incomplete or inadequate documents are returned for correction and resubmittal.

Submit all paperwork delivered with pumping plant equipment to the Engineer.

74-1.01D Quality Assurance74-1.01D(1) GeneralNotify the Engineer at least 10 days before testing. The pump plant must be complete before testing is performed.

Furnish all water and electrical energy necessary for testing. If authorized, you may use the pumping plant discharge system.

74-1.01D(2) Quality Control74-1.01D(2)(a) GeneralReserved

74-1.01D(2)(b) Operational TestsPerform the operational tests in the Engineer's presence. The Engineer verifies the pump nameplates before testing.

Fill the pump sump and storage boxes with water. Fill boxes as required until operational tests and performance tests are accepted. If authorized, you may add bulkheads in the storage boxes.

Perform operational tests of the pumping plant to demonstrate:

1. Proper rotation of each pump2. Manual operation of the pumps separately and combined3. Automatic operation of the pumps separately and combined

74-1.01D(2)(c) Performance TestsAfter acceptance of the operational tests, the Engineer will run performance tests on the installed pumping plant equipment under section 74-1.01C(5)(b). Performance tests include two 5-minute tests for each pump.

Performance tests must show that each installed drainage pump complies with at least (1) 97 percent of the factory certified performance curve and (2) the design pump rates shown. Each pump must not load its motor more than the actual full load nameplate amperage, regardless of head. The motor service factor will not be applied.

Remove bulkheads and blocking from pipes after performance testing is complete.

74-1.01D(2)(d) Drainage Pump Final InspectionSection 74-1.01D(2)(d) applies if you use the drainage pumps installed under the Contract to maintain total pumping capacity for the pumping plant drainage area before Contract acceptance.

Remove and disassemble the pumps before Contract acceptance. The Engineer performs a final inspection of the pumps.

Worn, damaged, or otherwise unsatisfactory parts must be replaced. Assemble and reinstall the pumps.

Test drainage pumps used before Contract acceptance under section 74-1.01C(5)(b) after the Engineer's final inspection and before Contract acceptance.

74-1.02 MATERIALS74-1.02A GeneralAnchorages must comply with the specifications for concrete anchorage devices in section 75-3.02C.

74-1.02B Delivery, Storage, and HandlingDeliver products to the job site in an undamaged condition in the manufacturer's original sealed container or other packaging system. Packaging must be complete with labels and instructions for handling, storing, unpacking, protecting, and installing.

Store and handle products using means and methods that comply with the manufacturer's written instructions and prevent damage, deterioration, or loss, and maintain warrantee requirements.

74-1.03 CONSTRUCTION74-1.03A GeneralReserved

74-1.03B PaintingPainting metal work must comply with section 59.

Paint uncoated drainage pump equipment, including metal work, as machinery under section 59-2.01C(4).

Before installing, paint wood on all surfaces under section 78-4.02.

Paint the pump number on each drainage pump motor and on each discharge pipe 5 feet above every landing. Numbers must be stenciled and at least 1-1/2 inches tall. Paint an arrow showing the direction of drainage pump rotation on each discharge pipe 4-1/2 feet above every landing. Arrows must be stenciled and at least 6 inches long. Use 2 applications of commercial quality white gloss enamel.

Paint surfaces before they become unreachable because of assembly operations.

Painting must not impair legibility, life expectancy, or function of the following items:

1. Brass surfaces2. Nameplates3. Warning plates4. Push buttons5. Operating handles6. Electrical cover plates7. Plastic parts8. Locks

Repair exposed nongalvanized threads or damaged galvanizing under section 75-1.02B.

Clean, prime, and touch up damaged areas of painted surfaces. Use the same type primer, paint, and color as the damaged finish.

Do not use cold galvanizing aerosol cans for repair or touch-up work.

74-1.03C Care and CleaningDo not install pumping plant equipment until the structural portion of the pump sump is substantially complete. You may install anchors and embedded equipment whenever required by the structural work.

Protect installed equipment from damage.

Clean equipment, enclosures, galvanized and noncorrodible metal surfaces, and wood surfaces in the pumping plant after installation under section 59-1.03D.

Remove debris from the pump house, pump sump, storage boxes, and premises at Contract acceptance.

74-1.03D Maintenance InstructionsSupply an 11 by 17 inch fused-laminate copy of:

1. Maintenance instructions in a galvanized sheet-metal frame. Install the frame on an interior pump house wall.

2. Control system schematic diagram. Install on the inside of a motor control center door.

74-1.03E Total Pumping Capacity and Maintenance RequirementsThe Department will not issue relief from maintenance and protection of pumping plants.

For existing pumping plants:

1. Stage removal activities such that total pumping capacity is maintained2. Provide pumping plant maintenance

Upon completion of pumping plants:

1. Maintain total pumping capacity2. Provide pumping plant maintenance

Furnish electrical energy necessary for maintaining total pumping capacity and maintenance requirements.

Pumping plant maintenance must include:

1. Removing dirt and debris from storage boxes, entrance bay, pump sump and drainage inlets

2. Performing adjustments and repairs for proper operation of drainage pump equipment and pumping plant electrical equipment

Keep a pump house logbook of pumping plant maintenance activities. Include maintenance dates, work performed, and the name of employee doing the work.

Maintain total pumping capacity at the corresponding dynamic head shown. Use one of the following alternatives to maintain total pumping capacity:

1. Stage activities such that the entire pumping plant is complete and able to maintain total pumping capacity.

2. Furnish an auxiliary pumping system with a capacity equal to the total pumping capacity. This system must include a power supply, controls, temporary drainage system, sump pumps, and discharge piping.

3. Combination of the above 2 alternatives.

Dispose of water. If authorized, you may use the pumping plant discharge system.

74-1.03F Use of Pumps before Contract AcceptanceSection 74-1.03F applies if you use the drainage pumps installed under the Contract to maintain total pumping capacity before Contract acceptance.

The pumping plant must be complete. Storage boxes, screens, pump sumps, and pumping plant equipment must be authorized before use.

Drainage water must be settled before entering the pumping plant. Drainage water must flow through safeguards and drainage inlet bulkheads to remove non-suspended solids. Non-suspended solids include debris, soil, sand, and gravel.

Safeguards include stilling ponds, basins, check dams, and weirs. Safeguards must:

1. Intercept drainage water and effectively stop non-suspended solids by settling2. Deliver settled water to paved surfaces, pipes, or other nonerodible channels leading to the drainage

inlets3. Be maintained such that the safeguards function as intended

Construct bulkheads around drainage inlets discharging to the pump sump and storage boxes. Drainage inlet bulkheads must consist of burlap sacks filled with pervious material.

74-1.04 PAYMENTNot Used

74-2 DRAINAGE PUMPING EQUIPMENT74-2.01 GENERAL74-2.01A SummarySection 74-2 includes specifications for installing drainage pumping equipment.


74-2.01C Submittals74-2.01C(1) GeneralReserved

74-2.01C(2) Product DataSubmit product data for the following items:

1. Drainage pumps2. Flexible expansion couplings3. Wall louvers4. Flap valves

5. Pressure gauges6. Pump house doors

Drainage pump data must include:

1. Pump components2. Representative pump curve showing the motor does not develop more than 95 percent of its

nameplate horsepower anywhere on the curve3. Hp, kVA, kW, power factor, and voltage4. Starting and running currents5. Thermal and magnetic trip settings6. Starter overloads current setting7. Motor nameplate data, including:

7.1. Full load speed7.2. Full load current7.3. Voltage7.4. Locked rotor kVA per rated horsepower or code letter

74-2.01C(3) CertificatesSubmit certificates for factory certified impeller balancing and factory certified drainage pump tests. Certification documents must be in US customary units.

Submit the factory original hard copy and 2 copies as pdf files on 2 CDs or DVDs. Send to OSD, Documents Unit. The Department will not accept a facsimile copy. Notify the Engineer of the submittal. Include in the notification the date and contents of the submittal.

Factory certified test documents for each drainage pump must include:

1. Generated pump curve from cutoff head to the minimum dynamic head shown. Show on the pump curve:1.1. Identified test points used to generate the pump curve.1.2. Plot of the design pump rates and dynamic heads shown on the pump curve.1.3. Identified and plotted test point horsepower and efficiencies on the pump curve.

2. Data that confirms the pump develops from 97 to 100 percent of motor nameplate power at the point the pump requires maximum power.

3. Motor rpm.4. Impeller final diameter.

74-2.01D Quality Assurance74-2.01D(1) GeneralReserved

74-2.01D(2) Regulatory RequirementsDrainage pumps must be factory certified under ANSI/HI 14.6. Each pump certification must be of the actual motor, pump, and trimmed impeller combination delivered to the job site.

Impeller balancing must be factory certified under ISO 1940-1, ISO Balance Quality Grade G6.3, at the supplied motor rpm.

74-2.02 MATERIALS74-2.02A GeneralNot Used

74-2.02B Drainage Pumps and Pumping Apparatus74-2.02B(1) GeneralReserved

74-2.02B(2) Drainage PumpsDrainage pumps must be submersible, end-suction, single-stage, close-coupled, overhung-impeller, centrifugal wastewater pumps complying with ANSI/HI 1.1-1.2 and ANSI/HI 1.3. Pumps must be assembled and tested at the factory. Do not use a base elbow mounted pump. Drainage pumps must be coated with the manufacturer's standard finish for the intended use.

Drainage pumps must be the rpm and voltage shown and comply with the design pump rates and dynamic heads shown.

Drainage pumps must have cast iron:

1. Casings2. Brackets3. Volutes with open inlet4. Horizontal pump discharges.

Drainage pumps must have a base support engineered to allow design flow into the volute and support the assembled weight of the drainage pump. Base support legs must be bolted to the floor.

Drainage pumps must have (1) replaceable bronze wear rings on the impeller and casing, and (2) non-magnetic stainless steel external nuts and bolts.

Drainage pump impellers must be:

1. Dynamically balanced.2. Made from ductile iron or bronze.3. Nonclog type, open or semi-open design for sludge, and able to handle solids up to 3 inches.4. Trimmed to develop from 97 to 100 percent of motor nameplate power at point of maximum load and

still deliver at least the design pump rates and dynamic heads shown.5. Keyed and secured to the shaft. Impeller balancing must not weaken or deform the impeller.

Drainage pumps must have a stainless steel shaft with factory-sealed lubricated roller bearings, tandem double-mechanical seals of tungsten carbide or silicon carbide with an oil reservoir, and have internal moisture sensors in the oil reservoir.

Motors must be a standard efficiency, NEMA code letter "A" through "G", 3-phase NEMA Design B motor with cable assembly. The cable assembly must include a 4-conductor power cable and a 5-conductor control cable. The motor with cable assembly must be rated for Class 1, Division 1 locations.

Motors must have NEMA Class F insulation, built-in thermal protection, with lifting eyes or lugs.

The cables must be listed for "Extra Hard Service" for Class 1, Division 2 locations. Each cable must include an equipment grounding conductor with green or green with yellow stripe insulation. The cables must be long enough to be installed from the motor to the enclosure shown without splicing. Install cable connectors for termination in junction box.

Each drainage pump must have a motor nameplate and pump identification nameplate. Attach identical nameplates to the inside of the corresponding starter compartment door on the motor control cabinet.

74-2.02B(3) Pumping ApparatusFlap valves must have an iron body with pipe flange frame and bronze mating surfaces.

Fasteners, expansion anchors, nuts, bolts, and washers must be Type 316 stainless steel.

Pressure gauges must be a compound gauge complying with ASME B40.100, Grade A, and must have:

1. 4-inch liquid filled dial, with stainless steel case and cover2. Reset screw3. 1/4-inch MPT bottom inlet4. Range of 30 inches Hg vacuum to 30 psi unless otherwise shown5. Gauge guard and gauge cock. Gauge guard must be 1/2 by 1/4 inch, PVC or CPVC body, PTFE or

Viton diaphragm, and rated for 0 to 250 psi. Gauge cock must be 1/2-inch NPT brass ball valve

74-2.02C Pump House Doors, Louvers, and Fans74-2.02C(1) GeneralFabricate pump house doors and frames under ANSI/SDI A250.8 or ANSI/NAAMM-HMMA 861.

Hinges must comply with ANSI/BHMA A156.1. Locksets must comply with ANSI/BHMA A156.2. Door gasketing must comply with ANSI/BHMA A156.22. Thresholds must comply with ANSI/BHMA A156.21.

Galvannealed steel sheet must be commercial steel, Type B, complying with ASTM A1008/A1008M with at least an A60 metallic coating complying with ASTM A653/A653M.

74-2.02C(2) Pump House DoorsThe pump house door consists of the door, frame, and door hardware. Furnish the factory applied finish coating system for exterior locations.

The pump house doors must be at least 1-3/4 inches thick, full flush, seamless hollow metal construction. The doors must comply with ANSI/SDI A250.4, physical endurance Level A, and the following:

1. Fabricated face sheets, vertical stiffeners, and top and bottom channels from 0.053-inch-thick galvannealed steel sheet.

2. Fabricate the steel-stiffened core using vertical stiffeners that extend full-door height. Install stiffeners not more than 6 inches apart and spot weld to both face sheets no more than 5 inches on center. Fill spaces between stiffeners with glass-fiber insulation or mineral-fiber insulation.

3. Top and bottom channels must be continuous and spot welded to both face sheets. The top channel must be flush and the bottom channel must be inverted.

4. Include moisture vents in the bottom channel.

The door frames must:

1. Be fabricated from 0.067-inch-thick galvannealed steel sheet, 5-1/2 by 2 inches in section2. Include galvannealed steel sheet grout guards at least 0.016 inches thick3. Have continuously welded (1) face joints and (2) miter corners that are flush and made smooth4. Include an integral stop5. Include a steel channel or angle stiffener head reinforcement at least 0.093 inch thick for openings

wider than 48 inches

Floor anchors must be welded to the bottom of jambs and mullions with at least 4 spot welds for each anchor. There must be at least 3 jamb anchors on each side.

Hinges must be Type A2111 or A5111, heavy weight, stainless steel pin, 5 knuckle, ball bearing, and non removable pin with set screw. Hinge fasteners must be supplied by the hinge manufacturer.

Locksets must be series 4000 bored, operational grade 1, security grade 1, with nonhanded steel lock chassis and self aligning trim with concealed through bolts. Locksets must be function F75 with knobs, chromium roses, and 1/2-inch steel square corner latchbolt.

Weatherstripping must have a polyurethane seal. Overhead door drips must have a 2-1/2 inch projection and be full width. Door shoe with rain drips must be mill finished aluminum with neoprene insert, end covers, and formed rain drip. Thresholds must be nominal 6 inches wide, mill aluminum with factory non slip finish, and span the full width of the opening shown.

74-2.02C(3) Wall LouversWall louvers must be continuous channel frame with nonvision, inverted Y blades. Wall louvers must:

1. Have the frame fabricated from 18 gauge electro-galvanized steel2. Have dual 12 gauge security grilles with through bolted screws on the inside3. Have bronze insect and bird screen in removable frame fastened on the inside4. Be factory primed and finished with enamel or powder coated epoxy

74-2.02C(4) FansReserved

74-2.02D Pipe, Joints, and Fittings74-2.02D(1) GeneralReserved

74-2.02D(2) Steel PipeGalvanized steel pipe must be standard weight complying with ASTM A53/A53M. Threaded fittings must be galvanized steel or galvanized malleable iron.

Welded steel pipe must comply with section 70-3, except that electrically insulated connections must not be used. Coat pipe under section 70-3.02B(3).

Steel pipe must be flanged. Flanges may be factory threaded or welded type. Flange dimensions must comply with ASME B16.5, Class 150.

Threaded flanges must be ductile iron complying with ANSI/AWWA C115/A21.15.

Welded flanges must be steel hub slip-on type complying with ANSI/AWWA C207, Class D. Galvanize welded flange pipe sections under section 75-1.02B.

Gaskets must be full face SBR rubber flange type complying with ASME B16.5, Class 150.

Steel flange bolts, washers, and nuts must be nonmagnetic stainless steel.

74-2.02D(3) Ductile Iron PipeDuctile iron pipe must comply with ANSI/AWWA C151/A21.51.

Pipe and fitting joints must be a gasketed mechanical joint type complying with ANSI/AWWA C111/A21.11.

Pipe fittings must comply with ANSI/AWWA C110/A 21.10 and ASME B16.1, Class 125.

Pipe and fittings must have an asphaltic coating complying with ANSI/AWWA C151/A21.51, and an epoxy lining complying with ANSI/AWWA C116/A21.16.

74-2.02D(4) Flexible Expansion CouplingsFlexible expansion couplings must be gasketed short-sleeve type having:

1. Mild steel middle ring with pipe stop2. 2 rubber-compounded wedge-section ring gaskets3. 2 mild steel follower rings4. Mild steel bolts to compress the gaskets

Galvanize all ferrous parts after fabrication. Assemble couplings such that a permanent watertight joint is obtained.

74-2.02E Bracing and HardwareBrace drainage pumps and other equipment to prevent movement during operation. Bracing method must comply with California Seismic Hazard Zone requirements in the CBC.

Slots for bolt and U-bolt holes in bracing and clips must be 2 bolt diameters wide. Slot holes parallel to the axis of the member. Install cut washers under bolt heads and nuts for slotted hole locations.

Galvanize braces, frames, and other metal hardware under section 75-1.02B.

Pumping plant metal work must comply with section 75-4.

74-2.02F Storage CabinetsStorage cabinets must:

1. Be wall mounted, steel, and bolted or welded construction2. Have double doors with single locking handle or magnet catch, and padlock staples3. Have 2 adjustable shelves4. Be 24 to 28 inches wide, 10 to 12 inches deep, and 30 to 33 inches tall

5. Be factory primed and finish painted

74-2.03 CONSTRUCTION74-2.03A GeneralInstall pressure gauges with gauge guards and gauge cocks. Mount the gauges vertically.

Furnish specialty tools required for assembly or adjustment of equipment. Mount tools in the storage cabinet. Install tools too large for the cabinet on adjacent brackets.

74-2.03B Pump House DoorsInstall pump house doors under ANSI/BHMA A156.115.

Check door frames for square, alignment, twist, and plumb before and after installation and adjust if necessary. Tolerances are ±1/16 inch.

Check the door frame as follows:

1. Squareness at door rabbet on a line 90 degrees from jamb perpendicular to frame head2. Alignment at jambs on a horizontal line parallel to plane of wall3. Twist at opposite face corners of jambs on parallel lines, and perpendicular to plane of wall4. Plumbness at jambs on a perpendicular line from head to floor

Fill space between the door frame and wall with grout. The grout slump must not exceed 4 inches. Do not deform or damage frames during grouting. Remove grout and other bonding materials from exposed surfaces of doors and frames immediately after grout work.

If grout contains an antifreezing agent, field apply a bituminous coating to the backside of frames.

Fit door in frame and shim as necessary. Install weatherstripping on the top and sides of frame. Install door shoe on door. Install overhead door drip over door. Use weatherproof silicone sealant and adhesive as the threshold bedding sealant.

Install the pump house door lock cover as shown.

Furnish a padlock for the pump house door until Contract acceptance. The Department furnishes padlocks after Contract acceptance.


74-3 PUMPING PLANT ELECTRICAL EQUIPMENT74-3.01 GENERAL74-3.01A SummarySection 74-3 includes specifications for installing pumping plant electrical equipment.


74-3.01C Submittals74-3.01C(1) GeneralSubmit a toll-free telephone service of the designated service organization for manufacturer's field services as an informational submittal.

74-3.01C(2) Product DataSubmit product data for:

1. Power and metering equipment2. Pump control3. Conduit4. Conductors and cables5. Nameplates and warning plates

6. Miscellaneous materials

74-3.01D Quality Assurance74-3.01D(1) GeneralReserved

74-3.01D(2) Regulatory RequirementsElectrical equipment must comply with section 86-1.02 and be NRTL listed.

Materials and workmanship must comply with section 86-1.02 and the following:

1. 8 CA Code of Regs § 3200 et seq.2. 19 CA Code of Regs § 1.00 et seq.3. NFPA 820, "Standard for Fire Protection in Wastewater Treatment and Collection Facilities"

74-3.01D(3) Manufacturer's Field ServicesAt Contract acceptance, provide 12 months of full maintenance for the pump controller by qualified employees of the pump controller manufacturer's designated service organization. Maintenance must include the manufacturer's routine preventive maintenance, adjustments for proper operation, and all required parts and supplies.

74-3.01D(4) Field Quality ControlA factory-authorized service representative must inspect, test, and adjust the pump controller for proper installation, operation, components, and connections.

74-3.02 MATERIALS74-3.02A GeneralAll magnetic coils of relays, starters, and other electrical equipment must be wound for an operating range having a mean equal to the voltage applied.

74-3.02B Power and Metering Equipment74-3.02B(1) GeneralReserved

74-3.02B(2) Service Pedestal EquipmentReserved

74-3.02B(3) Motor Control Center EquipmentPanelboards must be a factory-assembled panelboard interior with metal cover, single-phase, 3-wire, 120/240 V(ac), and must have:

1. 2-pole, 50 A main circuit breaker and molded case branch circuit breakers2. Phase, neutral, and ground buses that are hard-drawn copper, 98 percent conductivity3. Separate, isolated neutral bus4. Ground bus bonded to the cabinet5. Directory frame mounted on the inside of the door

Current switches must be self-powered, solid state, alternating current sensing switches having the following:

1. Single-pole, normally open contact rated 1-ampere at 240 V(ac)2. 1/2-inch-diameter thru-hole3. Low range current sensing level from 1 to 15 A4. High-range current sensing level from 15 to 300 A

Time meters must be 120 V(ac) and nonresettable from 0 to 99,999.9 hours.

Selector switches must:

1. Be single-pole, 2-position maintained, 10 A, 120 V(ac) rotary types2. Have contacts rated at 120 V(ac) and 35 percent power factor3. Have an inductive pilot duty rating of:

3.1. 60 A make3.2. 6 A break3.3. 10 A continuous

Pilot lights must be panel mounted, 120 V(ac), high-visibility LEDs with colored plastic lens and screw cap.

Control relays must be 120 V(ac), 3-pole, double-throw general purpose relays with clear plastic case and 11-pin plug base with 10 A contacts. Control relays must include a matching barrier type, 11-contact relay socket with 10 A contacts and screw terminals.

Time delay relays must:

1. Be 120 V(ac), electronic on-delay types2. Have double-pole, double-throw, double-break 10 A contacts, having a range from 0.6 to 60 seconds3. Have time delays set for:

3.1. TDR1: 5 seconds3.2. TDR2: 20 seconds

Intrinsically safe relays must be:

1. Solid-state, completely self-contained, latching types2. NRTL approved for use with Class I, Division 2 location sensors3. 120 V(ac) with single-pole, double-throw, 0.3 A contact with:

3.1. Maximum turn-on time of 5 milliseconds3.2. Maximum output current of 100 mA at 28 V(dc)

Push buttons must:

1. Be heavy duty, general purpose types2. Have 1 normally open, momentary contact rated at 120 V(ac) and 35 percent power factor3. Have an inductive pilot duty rating of:


Terminal blocks must be comply with NEMA ICS 4 and be:

1. DIN rail mounted or attached to the enclosure2. Rated for 30 A at 600 V(ac)3. Made from molded plastic4. Equipped with:

4.1. High-pressure clamp connectors4.2. Nameplates screwed to each block or a computer printed plastic label attached with adhesive4.3. Identified conductor numbers

74-3.02C Pump Control74-3.02C(1) GeneralThe automatic operation of the drainage pump must be controlled by the water level monitoring system and pump controller.

74-3.02C(2) Water Level Monitoring SystemThe water level monitoring system must be a trapped air level monitoring type that calculates the water depth using air pressure that is converted to an electrical signal. Trapped air level monitoring system must include an air compressor, 3-way solenoid valve, pressure transducer, polyethylene air tube, and a compression bell.

The system must:

1. Operate from 0 to 32 feet of water head2. Be accurate to ±0.1 feet for ambient conditions ranging from 0 to 200 degrees F3. Isolate the pressure transducer during the purge cycle of the air column

The air compressor must:

1. Have a 120 V(ac), ±1/20 hp shaded pole motor with integral overload protection2. Include an aluminum piston with Teflon-sleeved cylinder3. Have a capacity of at least 0.65 cu ft/min at 50 psi4. Be capable of initializing against 250 psi head

The solenoid valve must be a 120 V(ac), direct acting, three-way type having a NEMA Type 1 plastic body and compression connections.

The pressure transducer must output a 4 to 20-mA signal.

Polyethylene air tube must be 0.04-inch-thick wall type complying with ASTM D1248, Class A.

74-3.02C(3) Pump ControllerThe pump controller must (1) control the pumps based on the output signal of the water level monitoring system, (2) interface with the monitoring system, and (3) generate alarms. The controller must be 120 V(ac), solid state, industrial grade with software stored in nonvolatile memory. You may use proprietary software.

The controller must process the 4-20 mA signal from the water level monitoring system and operate the pumps as follows:

1. Alternate pumps for each lead pump operation2. Energize the lead pump at the water level shown3. Energize the lag pump at the water level shown4. De-energize the lead pump at the water level shown5. De-energize the lag pump at the water level shown6. If the pump controller energizes both pumps simultaneously, energize the lead pump first, then

energize the lag pump ten seconds later

The controller must output a 120 V(ac) signal when the high or low alarms are energized. The controller must energize the trapped air level monitoring system air compressor to purge the air system. The purge interval must be adjustable from 1 to 8 hours. The compressor run time must be adjustable from 5 to 30 seconds.

The controller must have an LED display with 1/2-inch-high letters that computes to 1 decimal place and use faceplate mounted, gold contact switches for programming. Do not use software for programming control levels.

The controller must have:

1. At least 6 output relays with 120 V(ac), 10 A rated contacts2. LED indicators mounted on plug-in bases3. Test push button and potentiometer for system testing

System testing must bypass the pressure transducer input to allow manual adjustment of the signal.

The controller must have at least 6 programmable levels each programmable from 0 to 32 feet. The controller must be capable of programming the following levels for the elevations shown:

1. High alarm2. Low alarm3. Lead pump on4. Lead pump off5. Lag pump on6. Lag pump off

The pump controller must include an internal power supply with:

1. 120 V(ac) input with V(dc) and current outputs to suit equipment2. Panel or channel mounting capability3. Convection cooling4. Wiring that is completely enclosed5. Adjustment range of at least 5 percent6. Operational temperature range from 32 to 120 degrees F

74-3.02D ConduitConduit and fittings must comply with section 86-2.05A, Type 1.

Flexible conduit and fittings must comply with section 86-2.05A, Type 4.

74-3.02E Conductors and Cable74-3.02E(1) GeneralDo not rewire manufacturer's stock items specified in section 74-3.01C(2).

74-3.02E(2) ConductorsConductors must comply with section 86-2.08, except conductors must be stranded copper and comply with the following:

1. In enclosures, install Type MTW2. In wet, underground, or outdoor locations, install Type XHHW-23. For all other locations, install Type THHN

74-3.02E(3) Conductor and Cable IdentificationIdentify conductors by number. Use one of the following methods:

1. Clear, heat-shrinkable tubing sealed over adhesive-backed paper or cloth wrap-around markers2. Preprinted, white, heat-shrinkable tubing

74-3.02F Nameplates and Warning Plates74-3.02F(1) GeneralNameplate and warning plates must be predrilled, multilayer, multicolor, plastic labels with mechanically engraved inscriptions.

Secure plates to equipment using screws or rivets. Do not use adhesives except on the inside face of enclosure doors.

If authorized, you may secure nameplates to an adjacent surface.

74-3.02F(2) Nameplate and Warning Plate IdentificationNameplate and warning plate inscriptions must be as shown.

Nameplate letters must be white, upper case Helvetica, and 1/4 inch in height. Leave at least a 3/8-inch black background on all 4 sides.

Equipment control switch nameplate letters must be white, upper case Helvetica, and 1/8 inch in height. Leave at least a 3/8-inch black background on all 4 sides. Secure the nameplate to the equipment directly beneath the switch.

Warning plate letters must be white, upper case Helvetica, and 1/4 inch in height. Leave at least a 3/8-inch red background on all 4 sides.

74-3.02G Miscellaneous MaterialsEnclosures must be minimum NEMA Type 1.

Floor coverings must comply with ASTM D178 and be rated for at least 20,000 volts dielectric strength, when tested under ASTM D149. Floor covering must be at least 1/4 inch thick.

Float switches must:

1. Be 120 V(ac), 8 A, single pole, double throw, mechanically-activated, wide-angle types2. Have an inert synthetic leak-proof, shockproof, and corrosion-resistant casing3. Have a 16-gauge, 2-conductor, SJOW sealed cable

Room lights must:

1. Be NRTL listed for damp locations2. Be ceiling mounted, heavy duty, industrial type fixtures3. Have a fiber-reinforced polymer housing with steel wireway4. Have a hinged acrylic lens with closed-cell gasket and ABS or stainless steel latches5. Include 2 T8 lamps with an electronic, instant-start ballast6. Include the manufacturer's emergency battery pack

Sump lights must:

1. Be NRTL listed and labeled for Class 1, Division 2 locations2. Be wall mounted, nonmetallic type fixtures3. Have a fiber-reinforced polymer housing4. Have a hinged polycarbonate or acrylic lens with nonmetallic latches5. Have nonmetallic lampholders6. Include 2 T8 lamps with an electronic, instant-start ballast

Entry lights must be outdoor, wall-mounted metal-halide luminaire type having a die-cast frame with hinged door and 1-piece front and bottom prismatic-glass lens.

Indicator lights must:

1. Be UL listed for wet locations.2. Have a vapor-tight, cast-metal base with pin socket.3. Have a impact and heat resistant colored polycarbonate threaded globe with neoprene gasket. Globe

color must be as shown.4. Have a threaded, die-cast-aluminum guard.5. Include a twin tube, 18 W, 120 V(ac), compact fluorescent lamp with integral ballast.

Light switches must:

1. Be NRTL listed, specification grade2. Have 20 A, 120/277 V(ac) , silver alloy contacts3. Be suitable for stranded conductor wiring4. Be ivory color

Duplex plug receptacles must be NEMA Type 5-20R, specification grade, ivory color, and suitable for stranded conductor wiring.

Junction and outlet boxes must comply with NEMA FB 1. Boxes must be cast iron with threaded hubs, have cast iron covers with gaskets, and be at least 4 by 4 by 1-7/8 inches. For weatherproof device boxes, use covers with gasketed, hinged flaps.

Sump light switches at remote pump station must:

1. Be single-pole, 2-position maintained, 10 A, 120 V(ac) rotary switches2. Have contacts rated at 120 V(ac) and 35 percent power factor3. Have an inductive pilot duty rating of:


Remote pump stations must be deadfront NEMA Type 4X enclosures having the following:

1. Hinged interior door and mounting panel on the back

2. Push buttons, duplex plug receptacle, nameplates, and sump light switch on the hinged interior door3. Terminal blocks on the mounting panel4. Hasp for a padlock

Seal failure relays must be (1) compatible with the drainage pump and (2) be a factory assembled unit having 1 normally open and 1 normally closed contact, each rated at 120 volts. Seal failure relays must have individual pump leak-indicator lights.

Pull boxes must comply with section 86-2.06.

Supporting devices must be corrosion resistant. Concrete anchorage devices must be Type 316 stainless steel.

74-3.03 CONSTRUCTION74-3.03A GeneralDo not install electrical equipment on unpainted wood panels.

74-3.03B Installation74-3.03B(1) GeneralReserved

74-3.03B(2) Conduit, Conductors, and CableDo not install conduits behind ladders or within 15 inches of the ladder-rung vertical centerline.

Install flexible conduit with approximately 6 inches of slack between terminations.

Flexible conduits and their fittings are considered a discontinuity and must be shunted by bonding jumpers. Install bonding jumpers inside the flexible conduit. Do not use the flexible conduit as the ground.

Install conductors and cable under section 86-2.09B and the following:

1. Pull conductors to prevent damage to sheath or insulation2. Install conductors and cables entering equipment and boxes with drip loops to prevent water reaching

the current-carrying parts or other conduits3. Remove insulation without damaging the conductor4. Identify conductors by number at each termination

Feeder and branch circuit conductors that are ungrounded must have continuously color-coded insulation. Conductors no. 6 AWG or larger may use colored tape. If used, apply tape at each connection and where accessible. Ungrounded conductor color-coding must be as shown in the following table:

Conductor Color-CodingSystem Color code

120/240V(ac)-Single phase Black, blue120/240V(ac)-Three phase Black, orange, blue120/208V(ac)-Three phase Black, red, blue480/277V(ac)-Three phase Brown, purple, yellow

74-3.03B(3) Motor Control CenterUse concrete anchorage devices to anchor the motor control center sections to the concrete slab. Shim each section to make the motor control center level.

The motor control center sections must fit through the pump house doorway or roof access opening. Any modifications required for installation must be pre-approved by the manufacturer and must not change performance.

Install current switches in the starter compartments. Loop power conductors around the sensing coil multiple times.

The Department does not adjust payment for disassembly, assembly, or modifications to the motor control center for installation.

74-3.03B(4) Panel LPThe panelboard directory must list the equipment controlled and the area designation. The directory must be printed using Times New Roman font and at least 12-point font size. Place the directory in the panelboard door frame with a transparent protective cover.

74-3.03B(5) Miscellaneous MaterialsSecure hangers, brackets, supports, and electrical equipment to surfaces using:

1. Concrete anchorage devices into concrete or solid masonry surfaces2. Machine screws or bolts into metal surfaces3. Wood screws into wood construction surfaces

74-3.03C Conductor SplicesDo not splice the drainage pump cables between the pumps and the enclosure shown.

Conductor splices must be made only in (1) fixtures, (2) junction boxes, and (3) gutters.

Splices must be made using either pressure connectors listed by a NRTL or soldered joints made by soldering irons. Do not use open flame soldering.

Insulate splices using the following sequence:

1. Apply 2 half-lapped layers of self-fusing, oil and flame-resistant, synthetic rubber tape covered by 2 half-lapped layers of pressure-sensitive, adhesive, PVC electrical tape at least 7 mils thick.

2. After taping the splice, apply an electrical insulating coating. The coating must be (1) fast drying, (2) resistant to oil, acids, alkalis, and corrosive atmospheric conditions, and (3) compatible with the tape.

74-3.03D TrainingTrain 6 Department personnel in programming, connection, operation, troubleshooting, and maintenance of the pump controller. Training must be for at least 4 hours and be at the job site.

The training instructor must be a factory-authorized representative of the pump controller manufacturer.

Training must:

1. Supply Department personnel with books, manuals, and other training material2. Include equipment required for pump controller training3. Include hands-on experience in programming techniques and operation


74-4 BOOSTER PUMP74-4.01 GENERAL74-4.01A SummarySection 74-4 includes specifications for installing booster pumps.


74-4.01C Submittals74-4.01C(1) GeneralReserved

74-4.01C(2) Shop DrawingsSubmit shop drawings for each booster pump.

74-4.01C(3) Product DataSubmit product data for the booster pump, including the following components:

1 Pump, including pump curve and motor information2 Valves3 Pump controller4 Booster pump enclosure5 Pressure gauge6 Appurtenances

74-4.01C(4) Closeout SubmittalsSubmit closeout submittals as a Maintenance and Operations Manual before completion of the work. Submit 2 manual copies as pdf files on CDs or DVDs. Submit 1 manual copy as fused-laminate prints in a 3 ring binder with tabbed dividers. Organize each manual as follows:

1. Index2. Parts list3. Operating instructions4. Maintenance instructions5. Pump curve

74-4.01D Quality AssuranceThe requirements of section 74-1.01D do not apply to the booster pump.

Notify the Engineer 5 business days before testing the booster pump. Test the booster pump in the Engineer's presence after connecting the booster pump to the irrigation system.

Discharge water from testing must not cause erosion, damage to equipment or plantings, or interfere with ongoing work.

The pump must not load the motor to more than the product of the nameplate (1) amperage and (2) service factor. The flow rate must not vary from the pump curve by more than 5 percent at 100 percent motor speed.

Test each booster pump at the following test points:

1. Zero flow rate (cutoff head)2. Maximum flow rate3. Design heads shown4. Steady-state flow for each irrigation controller station

Record the following for each test point:

1. Motor rpm2. Motor voltage3. Motor amperage4. Suction pressure of the pump5. Discharge pressure of the pump

After testing, run the booster pump through 3 successful, complete irrigation controller cycles.

If the booster pump fails testing, adjust system components as necessary and retest.

74-4.02 MATERIALS74-4.02A GeneralThe concrete for the foundation and pad of the booster pump must be minor concrete.

74-4.02B Manufactured Units74-4.02B(1) GeneralThe booster pump must consist of a factory assembled and tested skid-mounted system with the following components: pump, pump controller, booster pump enclosure, manifold, inlet and outlet valves, sensors, fittings, and appurtenances.

The system working pressure must be at least 150 psi.

The booster pump must be listed and labeled by a NRTL.

74-4.02B(2) Components74-4.02B(2)a GeneralReserved

74-4.02B(2)(b) PumpsPumps must consist of a close-coupled pump and motor. Pumps must be (1) end suction, centrifugal type with mechanical seals, (2) coated with the manufacturer's standard finish for exterior use, and (3) single or multiple stage. Booster pumps must have a horizontal or vertical configuration.

For horizontal pumps:

1. Casing must be close-grained cast iron with a replaceable bronze wearing ring2. Impeller must be (1) dynamically balanced, (2) made from bronze, and (3) keyed and secured to the

shaft by a stainless steel washer and cap screw3. Impeller shaft must be either steel with a bronze sleeve or stainless steel with no sleeve

For vertical pumps:

1. Casing must be close-grained cast iron with replaceable stainless steel wearing ring2. Motor pedestal must be close-grained cast iron3. Impeller must be (1) dynamically balanced, (2) made from stainless steel, and (3) keyed and secured

to the shaft by a stainless steel washer and cap screw3. The impeller shaft must be stainless steel

Motors must be standard efficiency, NEMA code letter "G" or smaller, open drip proof, and NEMA Design B.

74-4.02B(2)(c) Ball ValvesBall valves must have a 2-piece bronze body with full size port, chrome-plated or brass ball, and be rated for at least 400 psi.

74-4.02B(2)(d) Butterfly ValvesButterfly valves must have a ductile iron body with molded seat liner made from EPDM or PTFE, bi-directional stainless steel stem, locking lever with extended neck, and be rated for at least 250 psi.

74-4.02B(2)(e) Pump ControllerThe pump controller must consist of an enclosure, VFD, main disconnect, circuit breakers, motor starter, motor protector, and a pressure transducer.

The pump controller must keep the pump running when the flow of water fluctuates between the changing of the irrigation controller stations. The pump controller must have a potentiometer or keypad for adjusting motor speed.

The enclosure must be a NEMA Type 12 enclosure and rated for the horsepower, voltage, and phase shown. The ground bus must be bonded to the enclosure. The circuit breaker must be rated as shown.

The following equipment must be on the front of the enclosure:

1. 2-way switch for automatic mode or manual mode.2. Main disconnect. You may use the main breaker as the main disconnect if it is accessible on the front

of the enclosure.

3. High-visibility pilot lights rated for 120 V(ac), with colored plastic lens and screw caps. Include pilot lights for the following conditions:3.1. Power on.3.2. Run.3.3. No flow.

The VFD must:

1. Be listed and labeled by a NRTL2. Have 5 percent input impedance at rated motor horsepower3. Be mounted in the enclosure4. Have a LCD screen with operator interface5. Process the analog input signal from the pressure transducer and:

5.1. Determine water pressure5.2. Set the pump motor speed5.3. Determine "no-flow" conditions

When the pressure transducer signal indicates a "no flow" condition in the manifold, the VFD must stop the pump regardless of demand. The VFD must have an adjustable time delay for the "no flow" condition. Upon resumption of flow in the manifold, it must reset and resume automatic mode.

The VFD and the 2-way switch must operate the booster pump as follows:

1. Automatic mode must start and stop the pump based on digital input signals from multiple irrigation controllers

2. Manual mode must start the pump regardless of the input signal

Pressure transducer must be stainless steel, rated for at least 300 psi working pressure and send a 4-20 mA output signal to the VFD.

74-4.02B(2)(f) Booster Pump EnclosuresThe booster pump enclosure and lid must be fabricated from stainless steel or marine grade aluminum. The lid must have a continuous hinge, gas springs or equivalent lid supports, and a hasp for padlocking.

Gas springs must use their entire stroke without forcing the lid beyond its fully opened position. Side louvers must have internal bronze insect screens and be mounted on each end. The enclosure must include at least 1 thermostatically controlled exhaust fan with bronze insect screens.

74-4.02B(2)(g) Pressure GaugesPressure gauges must:

1. Comply with ASME B40.100, Grade B2. Include a 2-1/2-inch glycerin filled dial, stainless steel case and cover, reset screw, and 1/4-inch NPT

bottom inlet3. Read from 0 to 200 psi unless otherwise shown

74-4.02B(2)(h) AppurtenancesManifolds must be steel pipe or copper pipe. Steel pipe must comply with ASTM A53, Grade B. Copper pipe must comply with ASTM B88, Type K.

The skid must be (1) either steel or aluminum channel with risers as necessary, and (2) all welded construction. Welding must comply with AWS D1.1 for steel construction or AWS D1.2 for aluminum construction.

Fasteners, expansion anchors, nuts, bolts, and washers must be Type 316 stainless steel.

Nameplates must comply with section 74-3.02F.

74-4.02B(3) FabricationFabricate the booster pump as follows:

1. Install the inlet and outlet valves inside the booster pump enclosure.

2. Use threaded or flanged fittings on the pump inlet and outlet connections.3. The pump must be removable without disassembling the manifolds.4. Install pressure gauges in the manifolds on the suction and discharge sides of the pump.5. Install the pressure transducer in the manifold.6. Mount the pump controller inside the enclosure.7. Attach the enclosure to the skid.

74-4.03 CONSTRUCTION74-4.03A GeneralSupport the connected water piping outside the enclosure. Do not use the booster pump to support the connected piping.

Install a padlock after installing the booster pump. The Department will supply a lock upon Contract acceptance.

Place the maintenance and operations manual binder inside the enclosure.

74-4.03B Foundation and PadPour a concrete foundation and pad where the booster pump is shown. The foundation must be at least 3 inches wider than the skid on all 4 sides. Place the pad against the foundation on the door side of the enclosure. The pad must be the same width as the foundation and at least 36 inches long.

Conduit risers must be located inside the skid footprint.

74-4.03C Skid InstallationUse concrete anchorage devices to mount the booster pump skid on the foundation. Use at least 4 sets of tapered steel leveling wedges to level the skid. Use 2 wedges placed taper-to-taper at each point of support. The steel wedges must remain in place in the completed work.

After suction and discharge piping has been installed and tightened in place, level the skid and tighten the concrete anchor hex nuts against the base.

Fill the voids under the base with mortar complying with section 51-1.02F. Retighten the mounting bolts after the voids have been filled.

74-4.03D NameplatesInstall nameplates under section 74-3.02F. Install nameplates on:

1. Pump2. Pump controller3. Switches4. Main disconnect5. Circuit breakers6. Panel lights


74-5–74-10 RESERVED