IBM10B0014_amend-A001_attachment_22 13 43 Facility Packaged SewagePumping Stations Revised -9-_1.pdf

Nogales International Wastewater Treatment Plant Administration/O&M Building Rio Rico, Arizona

USIBWC Contract No.: IBM09D0006 FACILITY PACKAGED SEWAGE PUMPING STATIONS Page 22 13 43 - 1

SPECIFICATION 22 13 43

FACILITY PACKAGED SEWAGE PUMPING STATIONS

PART 1 - GENERAL

1.1 SUMMARY

A. This Section includes wet-well, packaged pumping stations with submersible grinder sewage pumps.

1.2 SUBMITTALS

A. Product Data: Include rated capacities, operating characteristics, furnished specialties, and accessories.

B. Shop Drawings: Show fabrication and installation details for the packaged sewage pumping station. Detail equipment assemblies and indicate dimensions; shipping, installed, and operating weights; loads; required clearances; method of field assembly;

components; electrical characteristics; and location and size of each field connection.

1.3 QUALITY ASSURANCE

A. Electrical Components, Devices, and Accessories: Listed and labeled as defined in NFPA 70, Article 100, by a testing agency acceptable to authorities having jurisdiction, and marked for intended use.

B. Comply with HI 1.1-1.2, "Centrifugal Pumps for Nomenclature and Definitions";

HI 1.3, "Centrifugal Pumps for Design and Application"; and HI 1.4, "Centrifugal Pumps for Installation, Operation and Maintenance," for sewage pumps.

C. Comply with UL 778, "Motor-Operated Water Pumps," for sewage pumps.

PART 2 - PRODUCTS

2.1 WET-WELL, PACKAGED SEWAGE PUMPING STATIONS

A. Wet-Well, Packaged Sewage Pumping Stations with Submersible Grinder Sewage Pumps:

1. Manufacturers: Subject to compliance with requirements, complete installation provide products by one of the following:

a. Flygt

b. ABS

2. Description: Factory fabricated, assembled, and tested with wet well for sewage pumps and collection of sanitary sewage and with sewage pumps.

a. Orientation: Shell underground top 4” above grade.

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b. Shell: Factory fabricated from fiberglass.

c. Entrance Tube: from entrance at grade and of the size required to replace largest piece of equipment, but not smaller than 36 inches in diameter.

d. Sewage Pumps: Two submersible grinder-type sewage pumps, with 2-bar guide rail, quick-disconnect system, controls, and piping. Include gray cast iron, Class 35B, coated with an acrylic dispersion zinc phosphate primer grinder impeller and hermetically sealed motor with moisture-sensing probe, mechanical seals, and waterproof power cable.

e. Pump Design: sealing of the pumping unit to the discharge connection shall be accomplished by a machined metal to metal watertight contact.

Sealing of the discharge interface with a diaphragm, O-ring, or profile gasket will not be acceptable.

f. Pump Power Cable: cable entry junction chamber shall not contain epoxies, silicones, or other secondary sealing systems shall not be considered acceptable.

g. Pump Motor: shall be a NEMA B design with stator windings insulated with moisture resistant, trickle impregnated, Class H insulation 180°C.

h. Mechanical Seal: tandem shaft seal system with tungsten-carbide/tungsten-carbide seal faces.

i. Warranty: pump manufacturer to provide 18 month warranty free of any defects of materials and workmanship including mechanical seals, bearings, etc. Warranty to include parts, labor, and freight of parts one-way.

Warranty to start from date of start-up and not to exceed 6 months from the date of shipment.

j. Local Repair & Service: pump manufacturer must have local representation with repair and service capabilities by factory certified and trained technicians. Repair facility must also be a factory authorized service center that has at least 5-years of experience.

3. Capacities and Characteristics:

a. Diameter or Dimensions of Shell: 5 ft

b. Pumping Station, Inlet Pipe Size: 4 inch

c. Pumping Station, Discharge Pipe Size: 2 inch

d. Sewage Pumps: Two required.

e. Each Sewage Pump:

1) Capacity: 80 gpm

2) Total Dynamic Head: 45 feet

3) Pump Shutoff Head: 59 feet

4) Speed: 3500

5) Impeller: Grinder Type

6) Discharge Size: 2 inch

7) Motor Size: 6 hp (minimum)

8) Electrical Characteristics:

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a) Volts: 480V.

b) Phases: Three

c) Hertz: 60.

f. Pumping Station Electrical Characteristics:

1) Full-Load Amperes: 7.6A

2) Minimum Circuit Ampacity: 20A

3) Maximum Overcurrent Protection: 20A

2.2 CONTROLS

A. Control Sequence of Operation: Cycle each sewage pump on and off automatically to maintain wet-well sewage level. Automatic control operates both pumps in parallel if wet-well level rises above starting point of low-level pump, until shutoff level is reached. Automatic alternator, with manual disconnect switch, changes sequence of lead-lag sewage pumps at completion of each pumping cycle.

B. Float-Switch System: 4-Floats required, senses variations of sewage level in wet well.

Include high and low adjustments capable of operating on 6-inch (150-mm) minimum differential of liquid level.

C. Motor Controllers: Magnetic, full voltage, nonreversing, NEMA rated. Include undervoltage release, thermal-overload heaters in each phase, manual reset buttons, and hand-automatic selector switches. Include circuit breakers to provide branch-circuit protection for each controller.

D. 120-V accessory controls with 15-A, single-phase circuit breakers or fuses for each item.

E. Control Panel: Enclosure complying with UL 508A with separate compartments and covers for controllers, H-O-A Switches, circuit breakers, transformers, alternators, power monitor, lightning arrestor, and door-in-door required (inner door)..

1. Enclosure: NEMA 250, Type 4.

F. Install labels on panel face to identify switches and controls.

G. Wiring: Tin-copper wiring.

2.3 ACCESSORIES

A. Remote Alarm Panel: Provide remote alarm panel for indication of high level alarm.

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2.4 MOTORS

A. General requirements for motors are specified in Division 22 Section "Common Motor Requirements for Plumbing Equipment."

2.5 MISCELLANEOUS MATERIALS

A. Structural Steel: ASTM A 6/A 6M, W or HP shapes, or ASTM A 36/A 36M, plates or beams.

B. Grout: ASTM C 1107, Grade B, nonshrink cement grout.

1. Design Mix: 5000-psi (34.5-MPa), 28-day compressive strength.

C. Concrete: Concrete is specified in Division 03 Section "Cast-in-Place Concrete”

2.6 PACKAGED SEWAGE PUMPING STATION FABRICATION

A. Fabricate shell from fiberglass with structural-steel reinforcement.

1. Attach structural-steel reinforcement to top and bottom heads.

2. Fabricate shell with continuous joints to make watertight and gastight construction.

3. Attach air vent to pump chamber.

4. Ladder: Fiberglass.

B. Entrance Cover: Waterproof and corrosion resistant, with lock. Include way to open cover from inside tube if cover is locked.

C. Air Vent: Duct fabricated from corrosion-resistant material, extended to above grade, outlet turned down, and with insect screen in outlet.

D. Factory fabricate piping between unit components.

1. Use galvanized-steel pipe and cast-iron fittings or ductile-iron pipe and fittings.

2. Use fittings for changes in direction and branch connections.

3. Flanged and union joints may be used instead of joints specified.

4. Use dielectric fittings for connections between ferrous- and copper-alloy piping.

E. Piping Connections: Unless otherwise indicated, make the following piping connections:

1. Install unions, in piping NPS 2 (DN 50) and smaller, adjacent to each valve and at final connection to each piece of equipment having NPS 2 (DN 50) or smaller threaded pipe connection.

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2. Install flanges, in piping NPS 2-1/2 (DN 65) and larger, adjacent to flanged valves and at final connection to each piece of equipment having flanged pipe connection.

F. Valves: Ferrous alloy.

1. Sewage Pump Piping: Include gate and check valves on each discharge pipe.

G. Wiring: Tin-coated copper.

PART 3 - EXECUTION

3.1 INSTALLATION

A. Excavation, trenching, and backfilling are specified in Division 31 Section "Earth Moving."

B. Install packaged sewage pumping station components where indicated, according to specific equipment and piping arrangement indicated.

C. Shell Base Supports: Form from structural-steel beams, of number and lengths required to support bottom of shell and to anchor beams to concrete foundation.

1. Use elevator blocks attached to bottom of shell to slope station floor 1 inch in 10 feet (25.4 mm in 3 m) down toward sump.

D. Grout under and around shell. Ensure that there are no voids between foundation slab and underslab of pumping station.

E. Fill voids between shell sidewalls, sleeves, and piping and make watertight seal with grout.

F. Sanitary sewer piping installation requirements are specified in Division 22 Section "Facility Sanitary Sewers." Drawings indicate general arrangement of piping.

G. Install piping adjacent to machine to allow service and maintenance.

H. Ground equipment according to Division 26 Section "Grounding and Bonding for Electrical Systems."

I. Connect wiring according to Division 26 Section "Low-Voltage Electrical Power Conductors and Cables."

J. Install identifying labels permanently attached to equipment.

K. Install operating instruction signs permanently attached to equipment or on pumping station wall near equipment.

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L. Prepare and paint ferrous piping in wet wells, structural-steel supports, and anchor devices with coal-tar epoxy-polyamide paint according to SSPC-Paint 16.

M. Paint field-welded areas to match factory coating.

3.2 FIELD QUALITY CONTROL

A. Perform tests and inspections and prepare test reports.

1. Manufacturer's Field Service: Engage a factory-authorized service representative to inspect components, assemblies, and equipment installations, including connections, and to assist in testing.

B. Tests and Inspections:

1. After installing packaged sewage pumping stations and after electrical circuitry has been energized, test for compliance with requirements. Furnish water required for pump tests.

2. Leak Test: After installation, charge systems and test for leaks. Repair leaks and retest until no leaks exist.

3. Operational Test: After electrical circuitry has been energized, start units to confirm proper motor rotation and unit operation.

4. Test and adjust controls and safeties. Replace damaged and malfunctioning controls and equipment.

C. Remove and replace packaged sewage pumping stations that do not pass tests and inspections and retest as specified above.

3.3 STARTUP SERVICE

A. Engage a factory-authorized service representative to perform startup service.

1. Complete installation and startup checks according to manufacturer's written instructions.

2. Adjust pump, accessory, and control settings, and safety and alarm devices.

- END OF SPECIFICATION -