SANITARY SEWERAGE PUMPS

SANITARY SEWERAGE PUMPS

• GENERAL

Drawings and general provisions of the Contract, including General and Supplementary Conditions and Division 01 Specification Sections, apply to this Section.

This Technical Specification document is issued as a supplement to Local Construction Specification.  The Local Construction Specification shall form the basis of the Project Specification. In case of contradiction or discrepancy between Local Construction Specification and Technical Specification, CONTRACTOR shall incorporate whichever is more stringent.  Where a question remains on which requirement is more stringent, CONTRACTOR shall submit the issue to Client and/or Client Representative in writing. The decision of Client and/or Client Representative shall be considered to be final.

• SECTION INCLUDES
  1. This Section includes the following sewage pumps and accessories for sanitary drainage piping systems in buildings:
     1. Submersible sewage pumps.
     2. Packaged, submersible sewage pump units.
     3. Packaged, wastewater pump units.
  2. Related Sections include the following:
     1. Division 22 Section “Sump Pumps” for applications in storm-drainage systems.

• SUBMITTALS
  1. Product Data: For each type and size of sewage pump specified.  Include certified performance curves with operating points plotted on curves; and rated capacities of selected models, furnished specialties, and accessories.
  2. Shop Drawings: Diagram power, signal, and control wiring.
  3. Operation and Maintenance Data: For each sewage pump to include in emergency, operation, and maintenance manuals.
• QUALITY ASSURANCE
  1. Product Options: Drawings indicate size, profiles, and dimensional requirements of sewage pumps and are based on the specific system indicated.
  2. Electrical Components, Devices, and Accessories: Listed and labeled as defined in IEC 60364, by a testing agency acceptable to authorities having jurisdiction, and marked for intended use.
• DELIVERY, STORAGE, AND HANDLING
  1. Retain shipping flange protective covers and protective coatings during storage.
  2. Protect bearings and couplings against damage.
  3. Comply with pump manufacturer’s written rigging instructions for handling.
• WARRANTY
  1. When warranties are required, verify with Owner’s counsel that special warranties stated in this Article are not less than remedies available to Owner under prevailing local laws.
  2. Warranty: Manufacturer’s standard form in which manufacturer agrees to repair or replace components of sewage pumping stations that fail in materials or workmanship within specified warranty period.
     1. Failures include, but are not limited to, the following:
        1. Structural failures including shell.
        2. Faulty operation of sewage pumps, controls, or accessories.
        3. Deterioration of metals, metal finishes, and other materials beyond normal use.
     2. Warranty Period for Shells: Two years from date of Substantial Completion.
     3. Warranty Period for Sewage Pumps and Controls: Two years from date of Substantial Completion.
     4. Warranty Period for Accessories: Two years from date of Substantial Completion.

• COORDINATION
  1. Coordinate size and location of concrete bases and pits.
• SPARE PARTS & MAINTENANCE
  1. Provide complete spare parts and maintenance equipment for two (2) years maintenance of all the equipment furnished under this section. Spare parts in a location designated by the Engineer or the Employer.
  2. All spare parts and maintenance equipment shall be provided in original packing, clearly identified and labelled. Provide complete schedules of spare parts and maintenance equipment clearly cross-referenced with the “Record Drawings” and maintenance instructions and manuals.
  3. All spare parts and maintenance equipment shall be as recommended by the equipment manufacturer and shall be subject to the final approval of the Engineer.
  4. Spare parts and maintenance equipment provided shall, as a minimum, equal the items used during the two (2) years maintenance period. The Contractor shall carefully log all spare parts utilized during maintenance period.
  5. Provide spare parts and maintenance equipment for all pumps, control panel etc. requiring maintenance and replacement.
  6. Provide two new complete sets of tools for the proper operation, routine maintenance and adjustment of all components and equipment.
• PRODUCTS
  • MANUFACTURERS
    1. Subject to compliance with the requirements of the Contract Documents.
    2. Products to be provided shall be from the manufacturer listed in Section 23 9000 –Approved Vendors List (AVL).
  • SUBMERSIBLE SEWAGE PUMPS
    1. Submersible, Quick-Disconnect Sewage Pumps: Factory-assembled and -tested, simplex or duplex, single-stage, centrifugal, end-suction, submersible, direct-connected sewage pumps complying with UL 778 and with HI 1.1-1.2 and HI 1.3 for submersible sewage pumps and with SWPA’s “Submersible Sewage Pumping Systems (SWPA) Handbook” for guide-rail supports.  Include reverse-flow assembly.
       1. Casing: Cast iron, with open inlet, legs (or guide-rail supports) that elevate pump to permit flow into impeller, and vertical discharge with companion flange for piping connection.
       2. Impeller: ASTM A 532/A 532M, abrasion-resistant cast iron; statically and dynamically balanced, open or semi-open, nonclog design and capable of handling solids; overhung, single suction, and keyed and secured to shaft.
       3. Pump and Motor Shaft: Stainless steel with factory-sealed, grease-lubricated ball bearings and double mechanical seals.
       4. Motor: Hermetically sealed, capacitor-start type; with built-in overload protection; lifting eye or lug; and three-conductor, waterproof power cable of length required and with grounding plug and cable-sealing assembly for connection at pump.  Comply with Division 22 Section “Common Motor Requirements for Plumbing Equipment.”
          1. Moisture-Sensing Probe: Internal moisture sensor and moisture alarm.
          2. Motor Housing Fluid: Air or oil.
       5. Guide-Rail Supports: Include the following for each sewage pump:
          1. Guide Rails: Vertical pipes or structural members, made of galvanized steel or other corrosion-resistant metal, attached to baseplate and basin sidewall or cover.
          2. Baseplate: Corrosion-resistant metal plate, attached to basin floor, supporting guide rails and stationary elbow.
          3. Pump Yoke: Motor-mounted or casing-mounted yokes or other attachments for aligning pump during connection of flanges.
          4. Movable Elbow: Pump discharge-elbow fitting with flange, seal, and positioning device.
          5. Stationary Elbow: Fixed discharge-elbow fitting with flange that mates to movable-elbow flange and support attached to baseplate.
          6. Lifting Cable: Stainless steel; attached to pump and cover at manhole.
       6. Submersible, Quick-Disconnect Grinder Pumps: Factory-assembled and -tested, simplex  or duplex single-stage, centrifugal, end-suction, submersible, direct-connected grinder pumps complying with UL 778 and with HI 1.1-1.2 and HI 1.3 for submersible sewage pumps and with SWPA’s “Submersible Sewage Pumping Systems (SWPA) Handbook” for guide-rail supports.
          1. Casing: Cast iron, with open inlet, legs (or guide-rail supports) that elevate pump to permit flow into impeller, and vertical discharge with companion flange for piping connection.
          2. Impeller: Bronze or stainless steel; statically and dynamically balanced, with stainless-steel cutter, grinder, or slicer assembly and capable of handling solids; overhung, single suction, and keyed and secured to shaft.
          3. Pump and Motor Shaft: Stainless steel with factory-sealed, grease-lubricated ball bearings and double mechanical seals.
          4. Motor: Hermetically sealed, capacitor-start type; with built-in overload protection; lifting eye or lug; and three-conductor, waterproof power cable of length required and with grounding plug and cable-sealing assembly for connection at pump.  Comply with Division 22 Section “Common Motor Requirements for Plumbing Equipment.”
             1. Moisture-Sensing Probe: Internal moisture sensor and moisture alarm.
             2. Motor Housing Fluid: Air or oil.
          5. Guide-Rail Supports: Include the following for each sewage pump:
             1. Guide Rails: Vertical pipes or structural members, made of galvanized steel or other corrosion-resistant metal, attached to baseplate and basin sidewall or cover.
             2. Baseplate: Corrosion-resistant metal plate, attached to basin floor, supporting guide rails and stationary elbow.
             3. Pump Yoke: Motor-mounted or casing-mounted yokes or other attachments for aligning pump during connection of flanges.
             4. Movable Elbow: Pump discharge-elbow fitting with flange, seal, and positioning device.
             5. Stationary Elbow: Fixed discharge-elbow fitting with flange that mates to movable-elbow flange and support attached to baseplate.
             6. Lifting Cable: Stainless steel; attached to pump and cover at manhole.
          6. Pump Discharge Piping: Factory or field fabricated, UPVC pipes, schedules 40, ASTM D 1785.
          7. Basin Pit Cover: Cast iron or coated steel and suitable to support controls.
          8. Controls: IEC 60529, Type 1enclosure, pedestal mounted unless wall mounting is indicated; with three mechanical- or mercury-float or micropressure switches in IEC 60529, Type 6 enclosures; mounting rod; and electric cables.  Include automatic alternator to alternate operation of pump units on successive cycles and to operate multiple units if one pump cannot handle load.
             1. Float Guide: Pipe or other restraint for floats and rods in basins of depth greater than 60 inches (1500 mm).
             2. High-Water Alarm: Rod-mounted, ICE 60529, Type 6 enclosure with mechanical- or mercury-float or micropressure -switch alarm matching control and electric bell; 120-V ac, with transformer and contacts for remote alarm bell.
          9. Capacities and Characteristics: See Equipment Schedule on Plans.

• SEWAGE PUMP BASINS
  1. Description: Factory fabricated basin with sump, pipe connections, and separate cover.
  2. Sump: Fabricate watertight, with sidewall openings for pipe connections.
     1. Material: PE or fiberglass.
     2. Reinforcement: Mounting plates for pumps, fittings , guide-rail supports, and accessories.
     3. Anchor Flange: Same material as or compatible with sump, cast in or attached to sump, in location and of size required to anchor basin in concrete slab.
  3. Cover: Fabricate with openings having gaskets, seals, and bushings; for access to pumps, pump shafts, control rods, discharge piping, vent connections, and power cables.
     1. Material: Same material of basin.
     2. Reinforcement: Steel or cast iron, capable of supporting foot traffic for basins installed in foot-traffic areas.
  4. Capacities and Characteristics: See Equipment Schedule on Plans.
• SEWAGE PUMP PITS
  1. Description: Concrete pit with sump, pipe connections, curb frame, and separate cover.
  2. Sump: Construct of watertight, cast-in-place, reinforced concrete with sidewall openings for pipe connections.
     1. Pipe Connections: Sleeved openings large enough for mechanical sleeve seals for drainage piping.  Sleeves and mechanical sleeve seals are specified in Division 22 Section “Common Work Results for Plumbing” and drainage piping is specified in Division 22 Section “Sanitary Waste and Vent Piping.”
  3. Curb Frame and Cover:
     1. Curb Frame Material: Galvanized steel or steel with bituminous coating.
        1. Pattern: Angle-cross-section shape with flat top surface Z-cross-section shape with raised outer rim of height matching cover, for recessed mounting with installed cover flush with top of floor slab.
     2. Cover: Fabricate with openings having gaskets, seals, and bushings; for access to pumps, pump shafts, control rods, discharge piping, vent connections, and power cables.
        1. Material: Cast iron or steel with bituminous coating.
        2. Reinforcement: Steel or cast iron, capable of supporting foot traffic for basins installed in foot-traffic areas.
     3. Capacities and Characteristics: See Equipment Schedule on Plans.

• PACKAGED, WASTEWATER PUMP UNITS
  1. Submersible Units: Factory-assembled and -tested, single-stage, centrifugal, end-suction, automatic-operation, submersible effluent pump unit.
  2. Capacities and Characteristics: See Equipment Schedule on Plans.
  3. Electrical Characteristics: See Equipment Schedule on Plans.
• FLEXIBLE CONNECTORS
  1. Description: 125-psig (860-kPa) minimum working-pressure rating and ends matching pump connections:
     1. Bronze Flexible Connectors: Corrugated, bronze inner tubing covered with bronze wire braid.  Include copper-tube ends or bronze flanged ends, braze-welded to tubing.
     2. Stainless-Steel Flexible Connectors: Corrugated, stainless-steel inner tubing covered with stainless-steel wire braid.  Include stainless-steel nipples or flanges, welded to tubing.

• BUILDING AUTOMATION SYSTEM INTERFACE

1. Provide auxiliary contacts in pump controllers for interface to building automation system. Include the following:

1. On-off status of each pump.
2. Alarm status.

• EXECUTION
  • EXAMINATION
    1. Examine roughing-in for plumbing piping to verify actual locations of sanitary drainage and vent piping connections before sewage pump installation.
  • CONCRETE
    1. Install concrete bases of dimensions indicated for pumps and controllers. Refer to Division 22 Section “Common Work Results for Plumbing.”
       1. Install dowel rods to connect concrete base to concrete floor. Unless otherwise indicated, install dowel rods on 18-inch (450-mm) centers around full perimeter of base.
       2. For supported equipment, install epoxy-coated anchor bolts that extend through concrete base and anchor into structural concrete floor.
       3. Place and secure anchorage devices. Use setting drawings, templates, diagrams, instructions, and directions furnished with items to be embedded.
       4. Install anchor bolts to elevations required for proper attachment to supported equipment.

• INSTALLATION
  1. Install sewage pumps according to applicable requirements in HI 1.4.
  2. Install pumps and arrange to provide access for maintenance including removal of motors, impellers, couplings, and accessories.
  3. Suspend wet-pit-mounted, vertical sewage pumps from basin and pit covers. Make direct connections to sanitary drainage piping.
  4. Set submersible sewage pumps on basin and pit floors. Make direct connections to sanitary drainage piping.
     1. Anchor guide-rail supports to basin and pit bottoms and sidewalls or covers. Install pumps so pump and discharge pipe disconnecting flanges make positive seals when pumps are lowered into place.
  5. Install sewage pump basins and connect to drainage and vent piping. Brace interior of basins according to manufacturer’s written instructions to prevent distortion or collapse during concrete placement.  Set basin cover and fasten to basin top flange.  Install cover so top surface is flush with finished floor.
  6. Construct sewage pump pits and connect to drainage and vent piping. Set pit curb frame recessed in and anchored to concrete.  Fasten pit cover to pit curb flange.  Install cover so top surface is flush with finished floor.
  7. Install packaged, wastewater pump unit basins on floor or concrete base unless recessed installation is indicated. Make direct connections to drainage and vent piping.
  8. Support piping so weight of piping is not supported by pumps.
• CONNECTIONS
  1. Piping installation requirements are specified in Division 22 Section “Sanitary Waste and Vent Piping.” Drawings indicate general arrangement of piping, fittings, and specialties.
  2. Install piping adjacent to sewage pumps to allow service and maintenance.
  3. Connect sanitary drainage and vent piping to pumps. Install discharge piping equal to or greater than size of pump discharge piping.  Install vent piping equal to or greater than size of pump basin vent connection.  Refer to Division 22 Section “Sanitary Drainage and Vent Piping.”
     1. Install flexible connectors adjacent to pumps in discharge piping.
     2. Install check and shutoff valves on discharge piping from each pump. Install unions on pumps having threaded pipe connections.  Install valves same size as connected piping.  Refer to Division 22 Section “General-Duty Valves for Plumbing Piping” for general-duty valves for sanitary waste piping.
  4. Ground equipment according to Division 26 Section “Grounding and Bonding for Electrical Systems.”
  5. Connect wiring according to Division 26 Section “Low-Voltage Electrical Power Conductors and Cables.”
• STARTUP SERVICE
  1. Engage a factory-authorized service representative to perform startup service.
     1. Complete installation and startup checks according to manufacturer’s written instructions.
     2. Verify bearing lubrication.
     3. Disconnect couplings and check motors for proper direction of rotation.
     4. Verify that each pump is free to rotate by hand. If pump is bound or drags, do not operate until cause of trouble is determined and corrected.
     5. Verify that pump controls are correct for required application.
  2. Start pumps without exceeding safe motor power:
     1. Start motors.
     2. Open discharge valves slowly.
     3. Check general mechanical operation of pumps and motors.
  3. Test and adjust controls and safeties.
  4. Remove and replace damaged and malfunctioning components.
     1. Pump Controls: Set pump controls for automatic start, stop, and alarm operation as required for system application.
     2. Set field-adjustable switches and circuit-breaker trip ranges as indicated, or if not indicated, for normal operation.
  5. Occupancy Adjustments: When requested within 12 months of date of Substantial Completion, provide on-site assistance in adjusting system to suit actual occupied conditions.  Provide up to two visits to Project outside normal occupancy hours for this purpose.
• DEMONSTRATION
  1. Engage a factory-authorized service representative to train Owner’s maintenance personnel to adjust, operate, and maintain controls and pumps.

END OF SECTION