SUBMERSIBLE SUMP PUMPS

SUBMERSIBLE SUMP PUMPS

PART 1 - GENERAL

1.1      THE REQUIREMENT

A.   The CONTRACTOR shall furnish and install submersible sump pumps with enclosed, submersible electric motors, controls and all appurtenant Work, complete and operable, in accordance with the requirements of the Contract Documents.

1.2      RELATED WORK SPECIFIED ELSEWHERE

A.   The requirements of the following sections and divisions apply to the Work of this section.  Other sections and divisions of the Specifications, not referenced below, shall also apply to the extent required for proper performance of this Work.

1.   Division 01, Additional General Requirements

2.   Section 09800, Protective Coating

3.   Section 11005, Equipment: Basic Requirements

4.   Section 11210, Pumps, General

5.   Section 16220, Electric Motors

6.   Section 16442, Control Panels

7.   Division 16, Electrical, applicable sections

8.   Section 17300, Control Strategies

9.   Section 17405, Process Instrumentation and Control

1.3      REFERENCE SPECIFICATIONS, CODES, AND STANDARDS

A.   All Work specified herein shall conform to or exceed the applicable requirements of the referenced portions of the following publications to the extent that the provisions thereof are not in conflict with other provisions of these Specifications.

B.   Comply  with  the  applicable  editions  of  the  following  codes,  regulations  and standards.

1.   Industry Standards:

ASTM International (ASTM)

ASTM A 48:   Standard Specification for Gray Iron Castings

C.  Comply  with  the  applicable reference  Specifications as  directed  in  the  General Requirements and the Additional General Requirements.

1.4      CONTRACTOR SUBMITTALS

A.   Submittals shall be made in accordance with the General Requirements, Additional General Requirements, Section 11210, Pumps, General, and as specified herein. A control panel engineering submittal shall be made in accordance with Division 16 for electrical and Section 17405, Process Instrumentation and Control.

B.   Submit catalogue cuts, wiring diagrams, and material data for all instrumentation associated with the pumps as required in section 11210, Pumps, General, item 1.4 CONTRACTOR SUBMITTALS.

1.5      QUALITY ASSURANCE

A.   General
1.   Comply with the requirements specified herein and  the  applicable reference
Specifications of the General Requirements and Additional General Requirements.

2.   Comply with applicable parts of Section 11005, Equipment: Basic Requirements, and Section 11210, Pumps, General.

1.6      WARRANTY

A.   The pumps and all components specified in this section shall be warranted by the manufacturer for a minimum three (3) year period after beneficial occupancy of the Work pursuant to “Use Prior to Final Completion” of the General Conditions, against defects in workmanship and materials.

PART 2 - PRODUCTS

2.1      PUMP NAME: XXXXXX

A.   General: Submersible sump pumps shall conform to the following requirements:

1.   Number of Pumping Units: 4

2.   Location: Thickening Dewatering Building Sub-Basement

3.   Operation: Intermittent and continuous

B.   Operating Conditions:

1.   Design Capacity (gpm): 600

2.   Pump Design Head (TDH-ft): 71

3.   Liquid to be Pumped: Process wastewater, centrifuge centrate, and washdown

4.   Max Pump Speed (rpm): 1,800

5.   Max Motor Size (hp): 25

6.   Sphere Size Passable, Minimum: 3 inches

2.2      PUMP REQUIREMENTS

A.   Construction:    Construction  of  submersible  sump  pumps  shall  conform  to  the following requirements:

1.   All major pump parts shall be made of cast iron conforming to ASTM A 48, Class 30 or better. The casing shall be equipped with legs to support it on the bottom of the sump, with correct clearance for suction entrance.  The pump shall contain no points of critical clearance nor require periodic adjustment or replacement to maintain reasonable pumping efficiency.   All waterway passageways shall be free from hollows, pinholes, cracks, fins, and projections that might cause cavitation.

2.   Impeller:    The  impeller  shall  be  recessed  radial  one-piece  casting  with  the impeller completely out of the flow path and made of the specified cast iron or of SAE63 bronze.   The impeller shall be statically, dynamically, and hydraulically balanced, accurately machined, and filed for smoothness.  The impeller shall have a pump-out vane on the rear shroud to prevent stringy material from building up in the seal area.

3.   Bearings: Permanently lubricated ball-and-sleeve type.

4.   Shaft: Stainless steel, series 400.

5.   Seal: Mechanical seal, single or double, in an oil reservoir.

6.   Hardware:  All exposed nuts, bolts, and miscellaneous hardware shall be Type 316 stainless steel.

7.   Mounting Method: Slide rail with stainless steel chain and hook.

8.   Pump Connection:  Flanged with dimensions conforming to ANSI B16.1, Class 125.

B.   Drive:  Each pump shall be close coupled to an oil-filled, submersible motor, suitable for 460-volt, 3-phase, 60 Hz ac power supply.  Motor service factor shall be a minimum of 1.15.  The motor shall be equipped with a seal moisture detector and overtemperature switch(es). The motor shall be furnished by the pump manufacturer and be coordinated with the requirements of the pump, sized to be non over loading during operation at any point on the pump curve. Motors shall meet the requirements of Specification 16220, Electric Motors.

C.  The pumps shall be capable of operating dry for extended periods without damage to the motor or seals.

D.  The motor shall be connected to the power supply with heavy-duty neoprene-covered waterproof cable. The control cable shall be separate from the power cable when the moisture or over temperature switch utilizes intrinsically safe technology. When the pump is installed in a classified area, it shall be approved and labeled for such area.  Refer to the Drawings for area classification information.

E.   Control:   The Instrumentation and controls shall be provided as indicated on the P&IDs,  elementary  diagrams  (control  schematics) and  shall  be  in  accordance  with Divisions 16, Electrical, and 17, Instrumentation and Control, of the Specifications. The design Drawings shall be modified to support the selected seal moisture detector and the over temperature switch configuration used by the manufacturer for the motor. A NEMA 4X 316 stainless steel control panel shall be provided for each pair of sump pumps with selector switches and indicating lights as shown in the Electrical and Instrumentation Drawings.

F.   Painting:  Pumps and motors shall be painted according to Section 09800, Protective
Coating, of these Specifications.

2.3      MANUFACTURERS

A.   The manufacturer shall be one of the following, Or Equal:

1.   Wemco.

2.   Goulds.

PART 3 - EXECUTION

3.1      INSTALLATION

A.   Pumping  equipment shall  be  installed  in  accordance  with  approved  procedures submitted with the shop drawings and as shown, unless otherwise accepted by the ENGINEER.

B.   General installation requirements shall be as specified for "Execution" in Section
11210, Pumps, General.

3.2      TESTING

A.   The electrical system shall be tested in accordance with Section 16080, Electrical Testing.

3.3      MAINTENANCE OF INSTALLED EQUIPMENT

A.   Maintain the operability and functionality of all installed equipment between the time of  installation  and  the  commissioning  period.    See  Specification section  01660  for requirements.

3.4      MANUFACTURER’S FIELD SERVICES

A.   Furnish the services of authorized technical representatives of the Manufacturer to assist/inspect the installed equipment and to certify that the equipment has been properly installed and is ready to operate, train OCSD personnel, conduct pre-operational mechanical checkout of the equipment, place equipment into operation, optimize the performances of the equipment and perform the field performance testing.

B.   At a minimum, conduct three separate site visits as follows:

1.   Inspection of equipment installation (8 hours minimum)
2.   Training of Personnel:    See  Specification section 01820, Training of Personnel, for requirements.

3. Commissioning.    See Specification section 01810, Commissioning, for requirements.   Number of hours shall be as required to meet all testing and commissioning requirements, but shall not be less than 8 hours.