S01 12FPC321Q0077 Attachment 1 Specifications.pdf

STATEMENT OF WORK

USDA – NRCS

Plant Materials Center

VARIABLE FREQUENCY DRIVE PUMP (VFD) PROJECT

Brooksville, Florida

February 2021

A. Scope of Work

B. Description of Project Site

C. General

D. Components

E. Project Closeout

F. Tasks

G. NRCS Supplied Materials and Point of Contact

Florida NRCS PMC Brooksville, Florida

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STATEMENT OF WORK

A. Scope of Work

The FL NRCS Plant Materials Center (PMC) operates a solid-set sprinkler irrigation system that is used to irrigate a total of 8 zones ranging in size from 2 to 4 areas. An existing well provides the irrigation water on demand via an inoperable turbine pump/motor.

The Contractor is responsible for designing, furnishing, and installing a new electric motor and turbine pump with a pump control system designed to operate one turbine irrigation pump using a Variable Frequency Drive (VFD) (capable of providing variable flow and variable pressure) and a rain sensor capable of shutting off the system during rain events.

The pump control system must have the capabilities to utilize proven technology in control design for a combination of flow and pressure ranges to provide the desired operating conditions of the pumping system. The pump and control system must be operator and maintenance friendly to ensure ease of system setup and maintenance and to limit down time.

The Contractor will develop and provide a site-specific operation and maintenance (O&M) plan for the irrigation pump/motor and VFD controls to FL NRCS.

The Plant Materials Center (PMC) electric turbine pump and motor design and installation consists of the performance of all operations necessary to:

(1) Size pump and motor with the capabilities to operate ranges for pump output pressures and flow rates shown in Table 1.

Table 1. Proposed output discharge pressures and flow rates for the VFD.

Minimum Pump Discharge Pressure (psi): 50 Maximum Pump Discharge Pressure (psi): 70 Minimum Flow (gpm): 230 Maximum Flow (gpm): 510

(2) Provide programming of the irrigation pump controller to allow PMC staff to operate existing irrigation zones (Table 2) independently of one another.

(3) Remove existing motor and pump which consists of removing pump starter cabinet, the electric motor, head, pump bowl section, discharge column, impellers, etc.

The contractor will be responsible for disconnecting the existing motor and from all electrical connections and all control panels and pulling and removing existing pump.

The existing motor is a 60 hp, 460 volt pws 3-phase 60 Hz 1800 rpm VHS NRR WPI RU motor. Also, work will consist of removing the Class 88 SZ# 2-1-1/2 fumas panel.

The existing pump is a turbine Goulds 10 RJLO - 9 stage turbine pump with one bowl assy., 6'x 16-1/2" discharge head, 120' of 6"x 1-3/16" column, and 416 s.s. shaft, 5' top and bottom section, 6"x 10' suction pipe, 6" female cone strainer.

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Table 2. Existing Irrigation Zone Information.

Irrigation Zone

Irrigation Zone Size

Number of Heads per Zone

Required Flow per Zone

1 3.0 acres 60 362 gpm

2 3.0 acres 56 362 gpm

3 3.0 acres 56 362 gpm

4 3.0 acres 56 362 gpm

5 2.3 acres 44 278 gpm

6 2.3 acres 44 278 gpm

7 2.3 acres 61 278 gpm

8 4.2 acres 89 506 gpm

The Contractor will design the control system to utilize proven technology in control design for a combination of flow and pressure ranges to provide the desired operating conditions of the pumping system.

The factory assembled system must include:

Variable Frequency Drive

VFD protection package

Line and load reactor as required

Lightning arrestors

Pressure transducer and flow meter

Enclosure

Main disconnects

Circuit breaker

Alarm

The existing pump, motor, electrical components, and appurtenances are located within an existing pumphouse. See Figure 2 for photographs.

All removed pumps, motors, and appurtenances will become property of the Contractor, removed from the property, and disposed of in an environmentally safe manner.

Contractor will furnish all personnel, equipment, labor, materials, transportation, office space, and other incidentals as required to perform the work in accordance with specifications, policies, etc., referenced within this SOW.

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All electrical work required for the installation will be performed, inspected, and accepted by an electrician licensed in the State of Florida.

For works of improvement involving sub-contractors, the prime contractor must always have a representative on site monitoring the work of the sub-contractor.

B. Description of Project Site

The property is owned and operated by Florida NRCS (Brooksville PMC, 14119 Broad St., Brooksville, FL 34601). The pump house is located in the southern end of the northern most field on the property, Latitude: N28°37’56.31”/ Longitude: W82°20’45.54”. The well is identified by the Southwest Florida Water Management District (SWFWMD) as Well No. 1.

The pump house is a non-air-conditioned building, currently housing an existing electric turbine pump and motor, controller with other appurtenances. See NRCS supplied materials outlined in Section G, Figure 1. Project Location Map.

The existing agricultural irrigation system is a fixed solid set sprinkler irrigation system. The system is designed to operate in eight (8) independent operating zones, six (6) zones in the north and two (2) zones in the south near the office (Table 2).

C. General

All equipment and materials must be new and shall bear the manufacturer’s name and trade name. In cases where a standard has been established for a particular material, the material shall be so labeled. The equipment to be furnished will essentially be the standard product of a manufacturer regularly engaged in the production of the required type of equipment for this type of work and shall be the manufacturers latest approved design.

Electrical equipment, materials and workmanship must comply with all applicable codes, safety and fire law regulations at the location of the work and shall conform to applicable codes and standards of the organizations listed below.

1. National Electric Code (NEC)

2. National Electrical Manufacturers Association (NEMA)

3. American National Standards Institute (ANSI)

4. Underwriters Laboratories (UL 508)

5. International Electrotechnical Commission (IEC)

For outdoor applications:

Depending on the design of the VFD unit, the described equipment shall be housed in one of two types when installed in outdoor applications.

VFD with external heat sinks

VFD units with external heat sinks that are designed to be flange-mounted on the exterior of a cabinet may be mounted in such a fashion. A dust-tight, flanged-mounted seal shall be maintained, and a NEMA 3R rated rain hood shall protect the external heat sinks. The mounting cabinet shall be a single NEMA 3R or NEMA 4 free standing, power-coated steel enclosure of a wall thickness of not less than 0.075in. The enclosure shall be sized

5 of 17 February 2021 accordingly to allow easy access to components and provide adequate ventilation for the VFD. The enclosure may also include louvers and filter fans as required from heat loss calculations and average ambient temperatures. All louvers and filter fans shall conform to appropriate NEMA 3R or NEMA 4 or UL Type 3 or UL type 4 standards. Direct exposure of the VFD unit to un-filtered, outside air is not acceptable. Sun shielding of the enclosure shall be provided for on-site.

VFD without external heat sinks

The described equipment shall be housed in a single NEMA 4 free standing, powder-coated steel enclosure of a wall thickness of not less than 0.075 inch. The enclosure shall be sized accordingly to allow easy access to components and provide adequate ventilation for the VFD. The enclosure shall include water/air heat exchangers, glycol/water heat exchangers, or air conditioners as required from VFD heat loss calculations and average ambient temperatures. Additional measures such as painting the enclosure white, installing a sun shield, and adding insulation to the inside of the enclosure shall also be considered as to prevent the temperature inside the enclosure from exceeding the acceptable VFD temperature limits. All components used, or modifications made, to the enclosure to aid in cooling must conform to NEMA 4 and applicable UL standards.

Control Circuit Wiring

Control circuit wiring inside the panel shall be 18 gauge (AWG) minimum, type MTW or THW, rated for 600 volts. All power wiring shall be 12 gauge (AWG) minimum rated for 600 volts. Conductors shall be color-coded using the same colors throughout the entire panel.

Control circuit wiring shall be organized in snap-cover raceways. All wires shall be individually numbered or labeled at both ends. All wiring shall be done in a workman-like manner.

Schematics and Labeling

As per UL and the NEC, all power input and output points of connection shall be clearly labeled. A detailed color schematic showing all control and power circuits shall be affixed to the inside of the panel door. In addition, a label displaying pre-programmed factory settings such as pressure set point shall be affixed to the inside of the panel door.

Safety

Control panel construction methods shall consider provisions to ensure operator safety from electrocution. UL508A safety standards shall be observed. In addition, all terminals on power circuits carrying greater than 50V shall be made finger-safe if this provision does not already exist in the original component manufacturer’s design. This provision may be accomplished with the addition of appropriate safety shields over exposed terminals.

Pump/System protection

The VFD shall have the following pump and system protection:

Low Pressure High Pressure Low Water Input (low suction pressure/low level), Broken Pipe

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Loss of Prime Dry Well Feedback Loss Alarm & Pump over-Cycling

Motor/Drive Protection

The Contractor will ensure the VFD protects the motor and the drive against the following conditions:

Output Phase Loss Ground Fault Motor Overload Motor over-Temperature & Broken Shaft Over Voltage Input Phase Imbalance Under Voltage Phase Imbalance and Short Circuit protection.

D. Components

Following the Notice to Proceed, the Government will schedule a pre-work conference to be held on-site. The Contractor will conduct bi-weekly meetings via teleconference to provide status updates to the Contracting Officer (CO) and Contracting Officer Representative (COR) during the performance period.

The meeting minutes shall include the status of all submittals, requests for information (RFI), and decisions reached during conferences. The Contractor will furnish meeting minutes within seven (7) calendar days after each conference.

E. Project Closeout

System Demonstration and Training. The Contractor shall provide for the demonstration of the system to the Government upon satisfactory completion of the Work. The demonstration shall include operation of the system in bypass mode in order to train personnel on procedures in the event of controller failure.

In addition, a training session shall be provided to include an overview of the system operating capabilities, procedures, and troubleshooting.

Pump Station Signage. The Contractor will provide a weather-protected step by step instruction sheet to be placed near the pump controller at each pump station to provide guidance on how to execute the changeover to bypass mode.

Warranties. The Contractor will provide a minimum 1 year labor warranty on the installation and a 3 year manufacturer extended warranty on the new VFD.

Close Out Submittals. Provide cut sheets, pump curve, operation and maintenance plan, and warranties of all installed material in Adobe (pdf) format. Provide as-built plans in the form of red-lined project drawings showing location and size of all new equipment and piping.

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F. Tasks

Tasks expected to be completed by the contractor are as follows:

1. Provide specifications for a VFD controller, motor and/or new turbine agricultural irrigation pump to operate in the pressure and flow ranges shown in Section A. Scope of Work, Table 1. The design package will include an operation and maintenance (O&M) plan for the PMC staff.

2. A QA/QC plan will be developed by the contractor.

3. Remove and dispose of the existing 60 hp, 460 volt pws 3-phase 60 Hz 1800 rpm VHS NRR WPI RU motor along with removing the Class 88 SZ# 2-1-1/2 fumas panel. Also, remove the existing pump which is a turbine Goulds 10 RJLO - 9 stage turbine pump w/l bowl assy., 6'x 16-1/2" discharge head, 120' of 6"x 1-3/16" column, and 416 s.s. shaft, 5' top and bottom section, 6"x 10' suction pipe, 6" female cone strainer.

All removed equipment will become property of the contractor and disposed of in an environmentally safe manner.

4. Install a new VFD motor, pump (if necessary), control panel, and appurtenances per manufacturer’s specifications.

5. Install a rain delay senor compatible with the irrigation system control panel.

6. Test for complete and proper operation.

7. Program the irrigation controller to operate irrigated zones independently. Zones in the northern fields (1-6) and zones in the southern fields (7 and 8).

8. Provide an instruction sheet and onsite training to the Florida NRCS PMC staff to be used as a user guide.

9. Provide as-built drawings, pump curve, pump RPM, pump flow ranges, pump operating pressures, O&M plan for the new equipment, and contractor certification.

G. NRCS Supplied Materials and Point of Contact

Below is a list of materials NRCS will provide the Contractor for use in the design and development of the new VFD motor, pump, and control panel. Contractor shall notify NRCS if it is determined any NRCS supplied materials are incomplete or any inaccuracies are found.

NRCS supplied materials are to be used exclusively for this contract and in no case be disseminated to any other agency, contractor, or persons without direct written permission from NRCS.

1. Project Location Map

2. Photographs of pump house, motor, and motor nameplate.

3. Southwest Florida Water Management District (SFWWMD) Water User Permit (WUP).

4. Point of Contact: Dr. M. J. Williams USDA, NRCS, Brooksville Plant Materials Center 14119 Broad Street Brooksville, FL 34601 mj.williams@usda.gov 352-796-9600 #3831