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HomeMy WebLinkAboutBID - 7002 IRRIGATION DESIGN AND DRAFTING SERVICES (2)rev 01/08 REQUEST FOR PROPOSAL 7002 Irrigation Annual Design and Drafting Services The City of Fort Collins Park Planning Department is seeking a qualified Irrigation Consultant (“Consultant”) to provide for irrigation project management, design and drafting services for various future yet-to-be-determined irrigation projects (primarily parks). E-Mail submittal shall to e-mailed to: jstephen@fcgov.com. Please send a separate e-mail to confirm that your proposal was received. Written proposals, five (5) will be received at the City of Fort Collins' Purchasing Division, 215 North Mason St., 2nd floor, Fort Collins, Colorado 80524. Please limit proposal length to 40 total pages or fewer. Proposals will be received before 3:00 p.m. (our clock), January 20, 2009. Proposal No. 7002 Irrigation Annual Design and Drafting Services. If delivered, they are to be sent to 215 North Mason Street, 2nd Floor, Fort Collins, Colorado 80524. If mailed, the address is P.O. Box 580, Fort Collins, 80522-0580. A pre-proposal meeting will be held Tuesday, January 6 at 2:00 PM at 215 N Mason 2nd floor in the Training Room. Questions concerning the scope of the project should be directed to Project Manager Kathleen Benedict, RLA, ASLA, at kbenedict@fcgov.com or (970) 416-2260. Questions regarding proposals submittal or process should be directed to , at jstephen@fcgov.com or (970) 221-6777. A copy of the Proposal may be obtained as follows: 1. Download the Proposal/Bid from the BuySpeed Webpage, www.fcgov.com/eprocurement 2. Come by Purchasing at 215 North Mason St., 2nd floor, Fort Collins, and request a copy of the Bid. The City of Fort Collins is subject to public information laws, which permit access to most records and documents. Proprietary information in your response must be clearly identified and will be protected to the extent legally permissible. Proposals may not be marked ‘Proprietary’ in their entirety. Information considered proprietary is limited to material treated as confidential in the normal conduct of business, trade secrets, discount information, and individual product or service pricing. Summary price information may not be designated as proprietary as such information may be carried forward into other public documents. All provisions of any contract resulting from this request for proposal will be public information. Sales Prohibited/Conflict of Interest: No officer, employee, or member of City Council, shall have a financial interest in the sale to the City of any real or personal property, equipment, material, supplies or services where such officer or employee exercises directly or indirectly any decision- making authority concerning such sale or any supervisory authority over the services to be rendered. This rule also applies to subcontracts with the City. Soliciting or accepting any gift, gratuity favor, entertainment, kickback or any items of monetary value from any person who has or is seeking to do business with the City of Fort Collins is prohibited. Financial Services Purchasing Division 215 N. Mason St. 2nd Floor PO Box 580 Fort Collins, CO 80522 970.221.6775 970.221.6707 fcgov.com/purchasing Collusive or sham proposals: Any proposal deemed to be collusive or a sham proposal will be rejected and reported to authorities as such. Your authorized signature of this proposal assures that such proposal is genuine and is not a collusive or sham proposal. The City of Fort Collins reserves the right to reject any and all proposals and to waive any irregularities or informalities. Sincerely, James B. O'Neill II, CPPO, FNIGP Director of Purchasing & Risk Management 2/9/00 7002 Irrigation Annual Design and Drafting Services I. PURPOSE The City of Fort Collins, Park Planning Department, is seeking a qualified Irrigation Consultant (“Consultant”) to provide project management, design, and drafting services for various on-going projects. The successful Consultant will address all of the tasks, issues, and requested information in their proposal, possess the requisite skills, experience and manpower necessary to produce high quality projects on time and on budget, and be motivated to work with City staff, citizens, and to accomplish the project goals and objectives. II. BACKGROUND The City has historically demonstrated a need for on-call Irrigation support. Typical services requested include small project design and construction support, and drafting. This contract may be utilized by all City Departments. III. SCOPE OF SERVICES On-Call Irrigation Design and Drafting Services The Consultant will work closely with City Project Managers to design and/or draft conceptual, preliminary, and final improvement plans. The Consultant will be responsible for producing plan documents under the direction of a City Project Manager. The services to be provided will consist of, but not be limited to, the following: plan documents, removals documentation, renovation design and documentation, general notes, specifications, construction notes and details suitable for construction, and construction observation services. The Consultant may also assist in calculation of plan quantities; irrigation pump design, specifications and details; water feature design, specification and details; and other work related to producing plan documents. It is essential that the successful Consultant be familiar with Industry standards such as ALCC and GreenCo as well as City of Fort Collins Parks Standards for irrigation & pump design in the Parks Components book. Additional requirements may include:  Attend coordination and review meetings, public meetings.  Coordination with other consultants (landscape, engineering, etc.) When the City provides survey data, that data will be provide in an ASCII file – comma delineated format (point number, northing, easting, elevation, description). For new projects, the Consultant may be required to provide design and/or drafting services. In such case, the Consultant will work closely with a City Project Manager to produce the best possible design and within the budget constraints associated with that project. The City does not require specific design software to be used, but final drawings shall be submitted to the City in AutoCAD and as mylar documents. Our anticipated need for design and drafting work is expected to be on an “as needed” basis. The Consultant should expect that services required for individual projects could range up to 500 hours depending on the complexity of the project(s). 2/9/00 The City is seeking Consultants that can excel at delivering projects with complex requirements (City and Parks Standards, publicly controversial projects, etc.). Equally important is the Consultant’s ability to quickly, efficiently and cost-effectively complete small, straightforward projects. IV. INSTRUCTIONS TO THE CONSULTANTS Please include the following in your proposal:  Resumes for all members of your firm who are proposed to provide the actual services. Resumes should include the person's name, title or job classification, qualifications and experience related to roadway design, computer drafting, and/or surveying, and specify the length of service with your firm.  References for your firm.  A list of computer hardware and software available to your technicians, and designers which they can use efficiently.  A statement as to the amount of time they could be available for the next four to six months. Planned Consultant Selection Schedule  Pre-Proposal Meeting: Tuesday, January 6, 2009 2:00 PM  Due to Purchasing: Tuesday, January 20, 2009  Interviews with Finalists: week of February 9th, 2009 The payment for services as described under the Scope of Services shall be based on unit prices, hourly rates, and reimbursement rates (at cost) for completed services. Please provide hourly prices and hourly prices for any sub-consultants. V. TERMS AND CONDITIONS The agreement will be effective for a period of one year from the date on the Services Agreement, and may be renewable for four (4) additional one-year terms (one year at a time), at the option of the City and if the Consultant is agreeable to the same terms as contained herein. Prices shall remain the same for the first renewal term. A price increase may be negotiated for subsequent renewals. The Denver Boulder Greeley CPIU published by the Colorado State Planning and Budget Office will be used as a guide. Billings and payments will be made using the prices listed on the agreed to Price Schedule. In the event that a service is requested, which is not listed on the Price Schedule, the Consultant, and the City will negotiate an appropriate unit price for the service. A copy of the City's standard Professional Services Agreement is attached. 2/9/00 VI. SELECTION CRITERIA AND METHOD REVIEW AND ASSESSMENT Professional firms will be evaluated on the following criteria. These criteria will be the basis for review of the written proposals and interview session. The rating scale shall be from 1 to 5, with 1 being a poor rating, 3 being an average rating, and 5 being an outstanding rating. WEIGHTING FACTOR QUALIFICATION STANDARD 2.0 Scope of Proposal Does the proposal show an understanding of the project objective, methodology to be used and results that are desired from the project? 2.0 Assigned Personnel Do the persons who will be working on the project have the necessary skills? Are sufficient people of the requisite skills assigned to the project? 1.0 Availability Can the work be completed in the necessary time? Can the target start and completion dates be met? Are other qualified personnel available to assist in meeting the project schedule if required? Is the project team available to attend meetings as required by the Scope of Work? 1.0 Motivation Is the firm interested and are they capable of doing the work in the required time frame? 2.0 Cost and Work Hours Do the proposed cost and work hours compare favorably with the project Manager's estimate? Are the work hours presented reasonable for the effort required in each project task or phase? 2.0 Firm Capability Does the firm have the support capabilities the assigned personnel require? Has the firm done previous projects of this type and scope? 6 Reference evaluation (Top Ranked Firm) The project Manager will check references using the following criteria. The evaluation rankings will be labeled Satisfactory/Unsatisfactory. QUALIFICATION STANDARD Overall Performance Would you hire this Professional again? Did they show the skills required by this project? Timetable Was the original Scope of Work completed within the specified time? Were interim deadlines met in a timely manner? Completeness Was the Professional responsive to client needs; did the Professional anticipate problems? Were problems solved quickly and effectively? Budget Was the original Scope of Work completed within the project budget? Job Knowledge a) If a study, did it meet the Scope of Work? b) If Professional administered a construction contract, was the project functional upon completion and did it operate properly? Were problems corrected quickly and effectively? 7 PROFESSIONAL SERVICES AGREEMENT WORK ORDER TYPE THIS AGREEMENT made and entered into the day and year set forth below by and between THE CITY OF FORT COLLINS, COLORADO, a Municipal Corporation, hereinafter referred to as the "City" and , hereinafter referred to as "Professional". WITNESSETH: In consideration of the mutual covenants and obligations herein expressed, it is agreed by and between the parties hereto as follows: 1. Scope of Services. The Professional agrees to provide services in accordance with any project Work Orders for , issued by the City. A blank sample of a work order is attached hereto as Exhibit "A", consisting of () pages and is incorporated herein by this reference. The City reserves the right to independently bid any project rather than issuing a Work Order to the Professional for the same pursuant to this Agreement. 2. The Work Schedule. The services to be performed pursuant to this Agreement shall be performed in accordance with the Work Schedule stated on each Work Order. 3. Time of Commencement and Completion of Services. The services to be performed pursuant to this Agreement shall be initiated as specified on each Work Order. Time is of the essence. Any extensions of any time limit must be agreed upon in writing by the parties hereto. 4. Contract Period. [Option 1] This Agreement shall commence , 200, and shall continue in full force and effect until , 200, unless sooner terminated as herein provided. In addition, at the option of the City, the Agreement may be extended for additional one year periods not to exceed () additional one year periods. Renewals and pricing changes shall be negotiated by and agreed to by both parties. The Denver Boulder Greeley CPIU published by the Colorado State Planning and Budget Office will be used as a guide. Written notice of 8 renewal shall be provided to the Professional and mailed no later than ninety (90) days prior to contract end. 5. Early Termination by City/Notice. Notwithstanding the time periods contained herein, the City may terminate this Agreement at any time without cause by providing written notice of termination to the Professional. Such notice shall be delivered at least fifteen (15) days prior to the termination date contained in said notice unless otherwise agreed in writing by the parties. All notices provided under this agreement shall be effective when mailed, postage prepaid and sent to the following address: Professional: City: With Copy to: In the event of any such early termination by the City, the Professional shall be paid for services rendered prior to the date of termination subject only to the satisfactory performance of the Professional's obligations under this Agreement. Such payment shall be the Professional's sole right and remedy for such termination. 6. Design, Project Insurance and Insurance Responsibility. The Professional shall be responsible for the professional quality, technical accuracy, timely completion and the coordination of all services rendered by the Professional, including but not limited to designs, plans, reports, specifications, and drawings and shall, without additional compensation, promptly remedy and correct any errors, omissions, or other deficiencies. The Professional shall indemnify, save and hold harmless the City its officers and employees, in accordance with Colorado law, from all damages whatsoever claimed by third parties against the City and for the City's costs and reasonable attorney’s fees arising directly or indirectly out of the Professional's negligent performance of any of the services furnished under this Agreement. The Professional 9 shall maintain commercial general liability insurance in the amount of $ combined single limits and errors and omissions insurance in the amount of . 7. Compensation. In consideration of services to be performed pursuant to this Agreement, the City agrees to pay Professional on a time and reimbursable direct cost basis designated in Exhibit "B", consisting of () page(s), attached hereto and incorporated herein by this reference. At the election of the City, each Work Order may contain a maximum fee, which shall be negotiated by the parties hereto for each such Work Order. Monthly partial payments based upon the Professional's billings and itemized statements are permissible. The amounts of all such partial payments shall be based upon the Professional's City-verified progress in completing the services to be performed pursuant to the Work Order and upon approval of the Professional's direct reimbursable expenses. Final payment shall be made following acceptance of the work by the City. Upon final payment, all designs, plans, reports, specifications, drawings, and other services rendered by the Professional shall become the sole property of the City. 8. City Representative. The City will designate, prior to commencement of work, its project representative who shall make, within the scope of his or her authority, all necessary and proper decisions with reference to the project. All requests for contract interpretations, change orders, and other clarification or instruction shall be directed to the City Representative. 9. Project Drawings. Upon conclusion of the project and before final payment, the Professional shall provide the City with reproducible drawings of the project containing accurate information on the project as constructed. Drawings shall be of archival, prepared on stable mylar base material using a non-fading process to provide for long storage and high quality reproduction. "CD" disc of the as-built drawings shall also be submitted to the owner in and AutoCAD version no older then the established city standard. 10. Monthly Report. Commencing thirty (30) days after Notice to Proceed is given on any Work Order and every thirty days thereafter, Professional is required to provide the City 10 Representative with a written report of the status of the work with respect to the Work Order, Work Schedule and other material information. Failure to provide any required monthly report may, at the option of the City, suspend the processing of any partial payment request. 11. Independent Contractor. The services to be performed by Professional are those of an independent contractor and not of an employee of the City of Fort Collins. The City shall not be responsible for withholding any portion of Professional's compensation hereunder for the payment of FICA, Workers' Compensation, other taxes or benefits or for any other purpose. 12. Personal Services. It is understood that the City enters into this Agreement based on the special abilities of the Professional and that this Agreement shall be considered as an agreement for personal services. Accordingly, the Professional shall neither assign any responsibilities nor delegate any duties arising under this Agreement without the prior written consent of the City. 13. Acceptance Not Waiver. The City's approval of drawings, designs, plans, specifications, reports, and incidental work or materials furnished hereunder shall not in any way relieve the Professional of responsibility for the quality or technical accuracy of the work. The City's approval or acceptance of, or payment for, any of the services shall not be construed to operate as a waiver of any rights or benefits provided to the City under this Agreement. 14. Default. Each and every term and condition hereof shall be deemed to be a material element of this Agreement. In the event either party should fail or refuse to perform according to the terms of this agreement, such party may be declared in default. 15. Remedies. In the event a party has been declared in default, such defaulting party shall be allowed a period of ten (10) days within which to cure said default. In the event the default remains uncorrected, the party declaring default may elect to (a) terminate the Agreement and seek damages; (b) treat the Agreement as continuing and require specific performance; or (c) avail himself of any other remedy at law or equity. If the non-defaulting party commences legal or equitable actions against the defaulting party, the defaulting party shall be 11 liable to the non-defaulting party for the non-defaulting party's reasonable attorney fees and costs incurred because of the default. 16. Binding Effect. This writing, together with the exhibits hereto, constitutes the entire agreement between the parties and shall be binding upon said parties, their officers, employees, agents and assigns and shall inure to the benefit of the respective survivors, heirs, personal representatives, successors and assigns of said parties. 17. Law/Severability. The laws of the State of Colorado shall govern the construction, interpretation, execution and enforcement of this Agreement. In the event any provision of this Agreement shall be held invalid or unenforceable by any court of competent jurisdiction, such holding shall not invalidate or render unenforceable any other provision of this Agreement. 18. Prohibition Against Employing Illegal Aliens. Pursuant to Section 8-17.5-101, C.R.S., et. seq., Professional represents and agrees that: a. As of the date of this Agreement: 1. Professional does not knowingly employ or contract with an illegal alien who will perform work under this Agreement; and 2. Professional will participate in either the e-Verify program created in Public Law 208, 104th Congress, as amended, and expanded in Public Law 156, 108th Congress, as amended, administered by the United States Department of Homeland Security (the “e-Verify Program”) or the Department Program (the “Department Program”), an employment verification program established pursuant to Section 8-17.5-102(5)(c) C.R.S. in order to confirm the employment eligibility of all newly hired employees to perform work under this Agreement. b. Professional shall not knowingly employ or contract with an illegal alien to perform work under this Agreement or knowingly enter into a contract with a subcontractor that knowingly employs or contracts with an illegal alien to perform work under this Agreement. c. Professional is prohibited from using the e-Verify Program or Department Program procedures to undertake pre-employment screening of job applicants while this Agreement is being performed. 12 d. If Professional obtains actual knowledge that a subcontractor performing work under this Agreement knowingly employs or contracts with an illegal alien, Professional shall: 1. Notify such subcontractor and the City within three days that Professional has actual knowledge that the subcontractor is employing or contracting with an illegal alien; and 2. Terminate the subcontract with the subcontractor if within three days of receiving the notice required pursuant to this section the subcontractor does not cease employing or contracting with the illegal alien; except that Professional shall not terminate the contract with the subcontractor if during such three days the subcontractor provides information to establish that the subcontractor has not knowingly employed or contracted with an illegal alien. e. Professional shall comply with any reasonable request by the Colorado Department of Labor and Employment (the “Department”) made in the course of an investigation that the Department undertakes or is undertaking pursuant to the authority established in Subsection 8-17.5-102 (5), C.R.S. f. If Professional violates any provision of this Agreement pertaining to the duties imposed by Subsection 8-17.5-102, C.R.S. the City may terminate this Agreement. If this Agreement is so terminated, Professional shall be liable for actual and consequential damages to the City arising out of Professional’s violation of Subsection 8-17.5-102, C.R.S. g. The City will notify the Office of the Secretary of State if Professional violates this provision of this Agreement and the City terminates the Agreement for such breach. 19. Special Provisions. Special provisions or conditions relating to the services to be performed pursuant to this Agreement are set forth in Exhibit "C", consisting of () page(s), attached hereto and incorporated herein by this reference. 13 THE CITY OF FORT COLLINS, COLORADO By: _________________________________ James B. O'Neill II, CPPO, FNIGP Director of Purchasing & Risk Management Date: ______________________________ ATTEST: _________________________________ City Clerk APPROVED AS TO FORM: ________________________________ Assistant City Attorney [Insert Professional's name] or [Insert Partnership Name] or [Insert individual's name] Doing business as ____ [insert name of business] By: _________________________________ Title: _______________________________ CORPORATE PRESIDENT OR VICE PRESIDENT Date: _______________________________ ATTEST: _________________________________ (Corporate Seal) Corporate Secretary 14 EXHIBIT "A" WORK ORDER FORM PURSUANT TO AN AGREEMENT BETWEEN THE CITY OF FORT COLLINS AND DATED: Work Order Number: Purchase Order Number: Project Title: Commencement Date: Completion Date: Maximum Fee: (time and reimbursable direct costs): Project Description: Scope of Services: ____________________________________________________________________________________ Acceptance _________________________________________ User Professional agrees to perform the services identified above and on the attached forms in accordance with the terms and conditions contained herein and in the Professional Services Agreement between the parties. In the event of a conflict between or ambiguity in the terms of the Professional Services Agreement and this work order (including the attached forms) the Professional Services Agreement shall control. Professional By:_________________________________ Date:_______________________________ The attached forms consisting of ___ (_) pages are hereby accepted and incorporated herein, by this reference, and Notice to Proceed is hereby given. City of Fort Collins By: James B. O’Neill II, CPPO, FNIGP Director of Purchasing and Risk Management (over $60,000.00) Date: 15 ATTACHMENT A IRRIGATION INSTALLATION CITY OF FORT COLLINS 1. General 1.1 A Certified Irrigation Designer shall do irrigation design or someone approved by the City of Fort Collins Parks Division. 1.2 Irrigation system design and installation shall be monitored, inspected, and approved by the City. Taps should be sized so the park can be irrigated in 8-10 hours minimizing impact to users. Irrigation taps should be separate from the restroom tap so that sewer charges are not incurred on irrigation water. Irrigation systems shall be installed and maintained so that no heads spray onto any streets in such a way that they spray passing motorists or pedestrians. Heads should be adjusted wherever possible so that they do not overspray streetside sidewalks. 1.3 The irrigation system must comply with the Uniform Plumbing Code and with the City of Fort Collins Electrical Code. 1.4 Any deviation in taps from the approved construction plans must be approved by the City Water / Wastewater Division prior to installation. Any water service line shall be coordinated with City of Fort Collins Water Utility. Any deviation in layout of the irrigation system from the approved construction plans must be reviewed and approved by the City Parks Division prior to installation. 1.5 Design: The irrigation system must be designed to provide full coverage and matched precipitation rates. Main line piping shall be sized based on flow demands (gpm’s); velocities shall not exceed 5.0 feet per second. Lateral piping shall be sized based on flow demands (gpm's). Velocities shall not exceed 6.5 feet per second. Principles of Xeriscape shall be utilized in the design of the irrigation system. The distribution uniformities for spray heads should be .55, rotor heads should be .65, stream rotors should be .75 and impact heads should be .65. An irrigation audit should be conducted by a certified irrigation auditor to confirm the targets have been met. Some design considerations include: shrub and perennial beds are to be zoned separately from turf areas; limited irrigation on medians in parking lots; consider separate bubbler zones for trees in drought situations, no valves on any sports fields; ballfield hose hookups with 1 ½” swing joints for ballfield on both sidelines; all part circles heads should be rotors, full circles can be either impacts or rotors; sloped areas are to have separate zoning for heads at the higher elevations from those at the lower elevation and areas with different exposures are to be zoned separately. Zones on ballfields should be independent to allow watering for seed or sod just to affect one field. Check valve-in-head should be used when head has that option to save water. Check valves-in-head are to be used for all areas adjacent to walkways 16 and at the bottom of berms and pond areas. The blowout fitting for winterization downstream of the backflow should be 1½” for mainlines 3” or larger and 1” for mainlines 2 ½” and smaller. 2. Materials 2.1 Mainline: Class 200 PVC, NSF approved. 1. If 3" or larger: Ringtite pipe. 2. If 2 ½” or smaller: glue joint. 2.2 Laterals: a. 2" or larger: Class 200 PVC, NSF approved. b. 1 ½" or 1": Class 200 PVC, NSF approved. c. No laterals smaller than 1" are permitted. d. Trickle tubing shall be weather and UV resistant material. e. Polyethylene Drip Pipe: NSF approved, SDR pressure rated pipe, only as approved for drip applications. 2.3 Pipe Fittings: a. Funny Pipe (pop-up turf heads only): to be compatible to the elbows needed for the sprinkler heads. The maximum length of funny pipe allowed is 3 foot. b. Lateral fittings: Schedule 40, Type 1, PVC solvent weld with ASTM Standards D2466 and D1784. c. Wrought copper or cast bronze fittings, soldered or threaded per installation details for all copper pipes. d. Mainline fittings: Ductile Iron for 3" and larger, PVC Schedule 80 for 2 1/2" and smaller. e. No prefabricated swing joints. 2.4 Sleeves: Ductile Iron Pipe or PVC under all paved surfaces. a. Sizes to be a minimum of two sizes larger than the pipe being sleeved. Minimum 2" diameter or larger for irrigation lines. Use full sections of pipe to minimize the number of joints under pavement. b. Wires to be in separate sleeve from pipe, 2" min. size pipe for control wire sleeves. c. Sleeves shall have marker tape on upper side and both ends for future locates. 2.5 Valves: a. Remote Control Zone Valves: Electrically operated, appropriate for the water supply, with manual bleed device and flow control stem. It shall have a slow-opening and slow-closing action for protection against surge pressure. It shall have a pressure regulator for pop-up spray head zones. If the valve is 17 2” or larger it should have a brass body. If the valve is 1 ½” or smaller it can be either brass or plastic. Valve brand to be approved by the Parks Department. b. Isolation Gate Valves: Kennedy 1571X or Matco #100M, able to withstand a continuous operating pressure of 150 psi. Clear waterway equal to full diameter of pipe. Shall be opened by turning 2” square nut to the left (wheel opening is unacceptable). c. Manual Drain Valve: 3/4" ball valve with tee handle. Watts, #B-6000, or approved equal. d. Quick Coupling Valves: 1" brass, Rainbird #5RC units with rubber cover. Keys Rainbird 55K 1" brass key. 2.6 Valve Boxes: House valves in valve box with matching locking cover (AMETEK brand only). Only one valve per box. Install in box sizes to allow work on components. 2.7 Control System: a. Controller: Irritrol MC Series controller 18 Stations or equal to be approved by the Parks Department. Controller shall be remote ready and use ADAPT-1 cable. Each controller shall have a separate Eicon MRX-RR receiver. One Eicon TRX-5V will be provided by the contractor for project. Frequency to be determined by Parks Department. Controller box shall be weather tight and vandal resistant, with locking exterior disconnect. b. Control System Enclosure: If the park has a pump house, install in pump house on same wall as the door. If there is no pump house, install in a Strong Box or equal to be approved by the Parks Department. c. Surge Protection: 8 foot copper grounding rod, double ott stranded copper wire, exothermic connection to ground rod, grounding buss receptacle, ground terminal strip and Irritrol SPD-587 surge protector per details. d. Install Mini-Clik II or wireless rain sensor, manufacturer to be approved by the Parks Department (one per controller) at location near the controller but not where it will receive precipitation from the irrigation system or easily vandalized. Owner must approve location. e. Run valve wires to junction box in the pump house. Label wires with the identification number of the remote control valve activated by the wire. Install terminal strips and run 18 gauge wire from junction box terminal strips to controller. Wire shall be in conduit. 2.8 Electric Control Wiring: #14 solid copper direct burial UF or PE cable, UL approved, or larger, per system design and manufacturer's recommendations. a. Five wires with consistent color scheme throughout: Red = live (one per valve) White = ground (#12 solid copper direct burial Cable) Black, blue and green = extra 18 b. Wire connections should be made with “pentite” type dry splices to join control wires to remote control valves. c. Wire splices need to be in a valve box not less than every 2500 ft. not counting remote control valve boxes. d. Two wire systems should be considered when practical. 2.9 Sprinkler Heads: All heads shall be of the same manufacturer as specified on the plans, and marked with the manufacturer's name and model in such a way that materials can be identified without removal from the system. City will specify brand and models to match other equipment in use in public system in the vicinity. a. Gear driven Rotor heads: Hunter, Rainbird, or approved equal. b. Impact heads: Rainbird, or approved equal. c. Pop-Up Spray heads: Rainbird 1800 PRS SAM, or approved equal. 2.10 Backflow Preventers: Backflow preventer shall be Febco brand and shall be installed and tested in compliance with the Colorado Primary Drinking Water Regulations. 3. Inspection Locate all utilities prior to trenching and protect from damage. Required calls shall include, but are not limited to the following: Call 221-6660 for Parks Division locates. Call 1-800-922-1987 for Utility Locates in the City of Fort Collins. Contact other Utilities as required. Inspect tap or other existing irrigation system, as applicable, prior to work. 4. Execution 4.1 Pipe trenching: a. Install pipe in open cut trenches of sufficient width to facilitate thorough tamping/puddling of suitable backfill material under and over pipe. b. Trench depths: 1. Mainline - Minimum of 24" deep from top of pipe to finished grade. 2. Lateral - Minimum of 16" deep from top of pipe to finished grade. 3. Sleeves - Install sleeves at a depth, which permits the encased pipe or wiring to remain at the specified burial depth. 4.2 Sleeves: Boring shall not be permitted unless obstruction in pipe path cannot be moved, or pipe cannot be re-routed. a. Mainline installed in existing sleeves at greater depth than adjacent pipe, shall have a manual drain valve at each end if the sleeve is longer than 20 feet, or at one end if the sleeve is less than 20 feet. b. Install sleeve so ends extend past edge of curb, gutter, sidewalk, bike path or other obstruction, a minimum of 2 feet. 19 c. Mark all sleeves with an "x" chiseled in walk (or other surface) directly over sleeve location. d. Sleeves installed for future use shall be capped at both ends. e. Separate sleeve (2" min. size) shall be used for all wiring. f. Sleeves shall not have joints. If joints are necessary, only solvent welded joints are allowed. g. Compaction of backfill for sleeves shall be 95% of Standard Proctor Density, ASTM D698-78. Use of water (puddling) around sleeves for compaction will not be allowed. h. Laterals along property lines shall be installed 2-3 feet inside of property line and teed over for heads. This avoids problems with homeowners installing fences at later dates. 4.3 Pipe Installation: a. Use Teflon tape on all threaded joints; only schedule 80 pipe may be threaded. b. Reducing pipe size shall be with insert reducing bushing at the tee. c. Snake PVC lateral pipe from side to side within trench. d. Cut pipe ends square and de-burr. Clean pipe ends before using primer and solvent cement. Join in manner recommended by manufacturer and in accordance with accepted industry practices. Cure for 30 minutes before handling and 24 hours before allowing water in pipe. e. Backfill shall be free from rubbish, stones larger than 2" diameter, frozen material and vegetative matter. Do not backfill in freezing weather. If backfill material is rocky, the pipe shall be bedded in 2" of fill sand covered by 6" of fill sand. f. After puddling or tamping, leave all trenches slightly mounded to allow for settling. g. Compact to proper densities depending on whether surface area over the line will be paved or landscaped. 4.4 Thrust Blocks: a. Shall be installed where PVC mainline (2 ½" or larger) changes direction over 20 degrees. b. Minimum of one cubic foot of concrete shall be used per thrust block. c. Keep pipe joint clean of concrete. Do not encase joint or pipe. d. Place wiring away from thrust block to avoid contact with the concrete. Use clear plastic sheeting to isolate the concrete from other materials. 4.5 Valve Installation: Install at least 12" from and align with adjacent walls or paved edges. a. Automatic Remote Valves: Install in such a way that valves are accessible for repairs. Make electrical connection to allow pigtail so solenoid can be removed from valve with 24" (min.) slack to allow ends to be pulled 12" above ground. 20 1. Flush completely before installing valve. Thoroughly flush piping system under full head of water for three minutes through furthest valve, before installing heads. 2. Valve assembly to include ball valve and union for ease of maintenance and repair. The union should be between the ball valve and the electric control valve. For ball valves larger than 2”, plastic ball valves may be used. 3. Install in valve box per details. b. Quick Coupler Valve: Install in 10" round locking valve box. Flush completely before installing valve. Thoroughly flush piping system under full head of water for three minutes through furthest valve. c. Isolation Gate Valves: Install in valve box as per detail. d. Valve Boxes: 1. Brand all valve boxes with the following codes: "SV" and the controller valve number per as built plans for all remote control valves; "DV" for all drain valves; "GV" for all isolation valves; "DRGV" for all drip system isolation valves; "QC" for all quick coupling valves; "WA" for all winterization assemblies; "FM" for all flow meter assemblies; and "MV" for all master valve assemblies. Use a branding iron stamp with 3" high letters. 2. Valve box shall NOT rest on mainline. Use brick or other non- compressible material per detail. Top of valve box to be flush with finish grade. Use add-ons to depth of valve gravel. 3. Install valves in box with adequate space to access valves with ease. Valves shall not be too deep to be inaccessible for repairs. 3" depth of 3/4" washed gravel to be placed in the bottom of each valve box with enough space to fully turn valve for removal (see detail). 4.6 Head Installation: a. Set heads plumb and level with finish grade. In sloped area, heads to be tilted as necessary to provide full radius spray pattern. b. Flush lateral lines before installing heads. Thoroughly flush piping system under full head of water for three minutes through furthest head, before installing heads. Cap risers if delay of head installation occurs. c. Pop-Up Heads along walks and bikeways: Bed heads in 6" layer of sand under the base of the head. Heads should be 2” from edge of walk. d. Nozzles: Supply appropriate nozzle for best performance. e. Adjustment: Adjust nozzles and radius of throw to minimize overspray onto hard surfaces. 4.7 Electrical Connections: New connections to be approved through City of Fort Collins Light & Power. Call 221-6700 to obtain power information and request connection. Actual connection to transformer or other power source to be done by City of Fort Collins Light and Power. Work to be coordinated and scheduled with Light & Power at 221-6700. All work other than actual connection, including access 21 to the transformer box where applicable, to be supplied by the contractor. All materials to be provided by the contractor. When working near any City Electric facility, prior coordination and approval is required. 4.8 Controller Installation: a. To be installed in an above ground location suitable to prevent vandalism and provide protection from adverse weather conditions, and per City direction. If a building is available, place controller inside building. All exposed wiring to and from the controller shall be encased in galvanized metal conduit. Exterior controllers to be installed on 6" thick concrete pad. b. Install Controller per City direction and in accordance with manufacturers’ specifications. Install surge protection, grounding rods and other accessory components as specified. c. Attach wire markers to the ends of control wires inside the junction box. Label wires with the identification number of the remote control valve activated by the wire. Then run 18 gauge wire to the controller. 4.9 Wiring: a. Comply with City of Fort Collins electrical codes b. Power source brought to controller to a ground fault receptacle installed within controller casing. c. String control wires as close as possible to mainline, consistently along and slightly below one side of the pipe. d. Leave minimum loop of 24" at each valve and controller and at each splice, at the ends of each sleeve, at 100-foot intervals along continuous runs of wiring, and change of direction of 90 degrees or more. Band wires together at 10' intervals with pipe wrapping tape. e. Install common ground wire and one control wire for each remote control valve. Multiple valves on a single control wire are not permitted. Install three extra wires, as specified, to the furthest valve on the system and/or each branch of the system, i.e. 2 or more extra wires per 12 valves. 5. Testing All tests to be run in the presence of City of Fort Collins Parks' representative. Schedule all tests a minimum of 48 hours in advance of tests. Repeat any failed tests until full acceptance is obtained. 5.1 Pressure Test: Leave mainline uncovered at joints and fittings. Place a pressure gauge (capable of reading pressures up to 120 psi minimum) on a Quick Coupling valve attached to the system. Fill mainlines with water and bring to full pressure. If new system is an add-on to existing system, isolate the new system from the old system after filling. Record pressure readings at 15- minute intervals for 4 hours. Pressure shall not drop more than 10% of initial reading. If pressure drops more than 10%, a thorough walkthrough of the 22 mainline shall be made to discover leakage and corrected. Repeat test until maximum desired pressure drop is achieved. 5.2 Operational Test: Activate each remote control valve from the controller in the presence of City of Fort Collins Parks representative. Replace, adjust or move heads and nozzles as needed to obtain acceptable performance of system. Replace defective valves, wiring or other appurtenances to correct operational deficiencies. 6. Completion Services 6.1 When project construction is complete, request from Parks’ representative a punch list inspection for Construction Acceptance: a. Demonstrate system to Parks and Recreation personnel. b. Provide Parks and Recreation personnel with ordering information including model numbers, size and style for all components. c. Provide two sets of as built drawings per below, showing system as installed with each sheet clearly marked "AS-BUILT DRAWINGS", the name of the project and all information clearly provided: 1. One set of reproducible Mylar, no larger than 24" x 36". 2. One set of all sheets reduced to 11" x 17", with each station color coded, and each sheet plastic laminated. 3. Provide as-built drawing on computer disk in a *.DWG format. d. Clean Up: Remove all excess materials, tools, rubbish and debris from site. 6.2 Once Construction Acceptance is obtained, begin warranty and maintenance period by contractor. Maintain irrigation system in optimal working condition for duration of period between Construction Acceptance and Final Acceptance. Make periodic adjustments to system to achieve most desirable application of water. 6.3 Request Final Acceptance inspection at least 30 days before the end of one-year maintenance period, from City Parks Division personnel. a. Provide Parks and Recreation personnel operating keys, servicing tools, test equipment, warranties/ guarantees, maintenance manuals, and contractor's affidavit of release of liens. Keys, tools and other operating equipment need to be turned over to Parks. Submittal of all these items must be accompanied by a transmittal letter and delivered to the Parks offices (delivery at the project site is acceptable with signed receipt). 7. Guarantee/Warranty and Replacement For the period following Construction Acceptance Notice by City of Fort Collins, and prior to Final Acceptance, all irrigation materials, equipment, workmanship and other appurtenances are to be guaranteed/ warranted against defects. Settling of trenches 23 or other depressions that damages structures or landscaping caused by settling and other defects to be corrected by the contractor at no cost to the City of Fort Collins. Make repairs within seven days of notification by the City of Fort Collins Parks’ representative. Guarantee / Warranty applies to all originally installed materials and equipment, and to replacements made during the guarantee/ warranty period. END OF SECTION 24 ATTACHMENT B PREFABRICATED PUMP STATION SECTION 1-GENERAL SPECIFICATIONS A. MAJOR DESIGN CRITERIA The power supply to the station shall be 3 phase, 60 hertz, 460 volts. The station shall be a variable speed drive system and shall conform to the following specifications without exception. B. ASSEMBLY All of the station components shall be mounted on the skid in a professional manner. The height of the station shall not exceed (78) inches, excluding any lighting fixtures. Prefabrication shall include all work except for the installation of components that extend into the wet well. The station shall be structurally sound to prevent excessive noise during operation. At least 2 grooved end pipe fittings shall be installed in each pump discharge spool for easy alignment with the pumps. No PCB, asbestos, or other environmentally unsafe materials shall be used in the construction of the station. All bolts shall be zinc plated for corrosion resistance. C. TESTING On completion of assembly, the pumping station shall be hydrostatically tested at not less than 200 PSIG. Before shipment, the assembled pumping station shall be thoroughly tested electrically with the proper line voltage including motor operation. D. SUBMITTAL DATA The submittal data for the pumping station shall include, but not limited to: pump curves; technical data sheets; a system drawing; an electrical schematic; a sequence of operation; the manufacture’s U.L. listing authorization form; a certificate of liability insurance for no less than one million dollars ($1,000,00.00); and all applicable warranties. E. WARRANTIES The pumping station as a whole shall be warranted in writing by the manufacturer against defects in design, materials, or construction for a period of 2 years from the date of shipment when equipped with the standard programmable controller and maintained according to the manufacturer’s instructions. The programmable controller shall be unconditionally warranted for 5 years from the date of shipment. The pumping station manufacturer shall be responsible for all warranties, pass through warranties are not acceptable. F. INSTALLATION SUPERVISION AND START-UP A factory trained technician shall supervise the installation of the pumping station, pumps, and motors. All equipment and personnel to actually perform the installation shall be provided by the contracting manufacturer. Complete start-up and operator training shall also be performed. A minimum of 2 trips of 1 day each shall be provided for the above. 25 SECTION II-STANDARD MECHANICAL SPECIFICATIONS A. VERTICAL TURBINE PUMP PERFORMANCE REQUIREMENTS Pumps shall not exceed their motor’s nameplate horsepower at flow rates from zero to design nor shall they exceed service factor horsepower at runout- B. VERTICAL TURBINE PUMP CONSTRUCTION REQUIREMENTS All pump impellers shall be statically balanced. All impellers shall be vertically adjustable by a hex nut located at the top of each motor. Each pump shaft shall be supported by bearings no further than 5 feet apart. Each line shaft column section shall be no longer than 5 feet. All column pipe couplings shall be threaded. The diameter of all shafting shall be large enough to transmit the maximum horsepower each pump can draw. All pump shaft couplings shall have left hand threads which tighten during pump operation. Each pump suction strainer shall be basket type, with a total inlet area not less than four times the suction bell inlet area. Each pump head shall be surface mounted and have a 125 class, 200 psig rated, discharge flange the same size as their respective check valves. The top diameter of each discharge head shall match the diameter of it’s motor base to distribute the load uniformly. A 1/4 inch thick neoprene pad shall be installed under each pump head for sealing and vibration dampening. Each discharge head shall be provided with a drain for the stuffing box waste water and an air release valve. No waste water shall be permitted to run onto the skid deck. Each discharge head shall include a stuffing box complete with gland plate, grease seal, packing bushing, adjustable packing gland, packing, and a water slinger. A continuous bypass line shall be provided on each pump, from the stuffing box to the wet well, to prevent damage to the packing from heat or excessive pressure. Each motor shaft shall be removable and couple to the pump head shaft between the bottom of the motor and the packing gland with sufficient clearance to allow removal of the packing assembly without motor removal. C. VERTICAL TURBINE PUMP MATERIAL REQUIREMENTS Each bowl assembly including suction case, intermediate, and discharge bowls shall be cast iron with enamel lining inside. Each pump discharge head and gland plate shall be cast iron. Steel pump heads will only be acceptable if they are completely coated with electrostatically applied and baked on, epoxy coating. Each impeller, suction and discharge case bearing, column bearing retainer, discharge head bearing, packing follower, packing bushing, and motor shaft hex nut shall all be bronzed. All intermediate bowl bearings shall be fluted rubber or bronze. Each pump shaft, line shaft, and motor shaft shall be turned, ground and polished 416 stainless steel. The line shaft couplings and the motor shaft couplings shall be 304 stainless steel. All column piping and couplings shall be steel. All packing material shall be Teflon impregnated non-asbestos fibers. Each water slinger shall be rubber. Each pump suction strainer shall be zinc plated or galvanized steel. D. PUMP CHECK VALVES The pump discharge check valves shall be spring loaded, center guided, silent, wafer type. The valve body shall be cast iron. The internals shall be bronze and stainless steel. A resilient, buna-a seat must be provided for drip tight sealing. The valve must have a compound, metal and metal to buna-n, sealing action to prevent damage to the resilient seat. All internal parts must be replaceable. Each valve shall mount directly to each pump discharge head flange. The pump check valves shall be 125 class, 200 psig 26 rated and the seat shall have a minimum pressure rating of 300 psig. Check valve sizes shall be 4 inch with maximum flow rates of 600 gpm (10 feet per second velocity) respectively, at a 2.5 psig pressure drop. E. PUMP DISCHARGE ISOLATION VALVE The pump discharge isolation valve shall be of the victaulic butterfly type to be used with grooved type piping. The valves shall be U.L. listed and be rated in excess of 200 PSI. F. MISCELLANEOUS ISOLATION VALVES Isolation vales shall be provided as follows: at each appropriate drain connection, on the air and water side connections to the air release valve, in the pilot assemblies of all control valves, and at each pressure gauge tapping. Each isolation valve shall be a full port ball valve rated at 400 psig working pressure with a brass body, a chrome plated brass ball, and a Teflon seat. The actuating handle shall turn 90 degrees from full-open to full-closed position. G. WASHDOWN VALVE A brass hose bib shall be provided on the discharge side of the main control valve for station washdown. H. DRAINS Provide the following drain connections: a drain line without a valve, from each pump discharge head to carry off packing gland waste water; a drain valve in each pump discharge spool downstream of the pump check valve; a drain valve in the discharge manifold between the tank and the control valve near the control valve inlet flange; a drain valve on the discharge side of the main control valve. All of the above drain connections shall discharge into the wet well. All drain valves shall be 3/4 inch. I. PIPING AND FITTINGS All piping 4 through 10 inch nominal size shall be Schedule 80, black steel, ASTM A120 or A53 Grade B, electric resistance welded pipe. All welded flanges shall be ANSI B16.5, 150 class, forged carbon steel, flat faced weld-neck or slip-on type, ASTM A105 Grade B. All welded fittings shall be seamless, ASTM A234 Grade B. All grooved end fittings shall be rated for a minimum of 350 psig. All piping smaller than 4 inch shall be schedule 40, galvanized steel, ASTM A120 Grade B, continuous welded pipe. All threaded fittings shall be galvanized malleable iron, 150 class, ASTM A126 Grade B. All pressurized tubing material shall be black, Impolene, polymer for maximum resistance to freeze damage and ease of maintenance. All pressurized tube fittings shall be brass. J. PRESSURE GAUGES Provide a system pressure gauge mounted on the outside of control panel as well as the control valve mounted interstage and system pressure gauges previously mentioned. All gauges shall be 3 1/2 inch, glycerin filled, with an accuracy of ANSI Class B or better. All gauge pressure sensing points shall be equipped with shutoff valves. K. SKID BASE The skid base shall be constructed with 6 inch structural steel channel cross members, a 3/4 inch solid steel pump mounting plate and 3/16 inch steel diamond plate safety deck. The skid shall completely cover the wet well. A wet well access hatch or flap shall be provided. The underside of the skid shall be coated with an epoxy based, coal tar lining, not less than 10 mils thick. Skid shall be bolted to the pad to prevent any movement. 27 L. MECHANICAL PACKAGE PAINTING The entire station, with the exception of the control panel, motors, and the underside of the skid base, shall be cleaned and painted with a multipart coating system with a total dry-film thickness of not less than 6 mils. One coat of a modified alkyd, rust inhibiting, industrial enamel primer shall be applied to a dry-film thickness of not less than 4 mils. Provide a 1 quart can of the finish paint with the station for job site touchup use. SECTION III-OTHER MECHANICAL COMPONENTS A. MOTOR NON-REVERSE RATCHETS Each motor shall be equipped with a non-reverse ratchet to protect the pumps from reverse rotation damage caused by a check valve failure or incorrect electrical phasing. B. PUMP DISCHARGE ISOLATION VALVES A valve shall be provided in the discharge spool of each pump for easy pump and check valve isolation during station operation. Each pump discharge valve shall be the same size as it’s upstream check valve. The valves shall be victaulic, butterfly type rated at no less than 200 psig working pressure. Each valve shall have a ten position, locking, lever handle with open and closed indications. Each valve body and handle shall be cast iron with a nickel plated ductile iron disc, a 316 stainless steel shaft, and a EPDM rubber seat. C. DISCHARGE ISOLATION VALVE A valve shall be provided at the discharge connection for easy isolation of the pumping station. The discharge valve shall be the same size as the header connection. The valve shall be a lug end, butterfly type rated at no less than 200 psig working pressure. The valve shall have a 10 position, locking, lever handle with open and closed indications. The valve body and handle shall be cast iron with a nickel plated ductile iron disc, a 316 stainless steel shaft, and an EPDM rubber seat. D. RELIEF VALVE Provide a 2 inch hydraulically operated, pilot controlled, diaphragm-type, relief valve downstream of the main control valve. It shall protect the irrigation piping from high pressure caused by sudden large decreases in the flow rate. The valve shall limit maximum system pressure by relieving excess pressure without causing surges. It shall be a 250 class threaded, 300 psig rated, angle pattern valve. Pilot controls shall include a pressure relief pilot valve, a closing speed control to prevent surges, and a valve position indicator to show the relief valves’ position from full open to full closed. Isolation valves shall be provided with the pilot controls at each occupied inlet, outlet, and cover tapping on the relief valve body to permit easy servicing and troubleshooting. A flow clean strainer shall be provided to filter all inbound water to the pilot system. The complete pilot assembly shall be constructed so that it may be removed as a complete unit for replacement, repair, or winter storage purposes. The materials of construction for the relief valve, it’s pilot valve, and the pilot isolation valves shall be the same as those for the main control valve. The relief valve discharge shall be piped to waste to the wet well. E. WYE STRAINER A 4 inch, 125 class flanged, 200 psig rated, wye strainer shall be installed in the discharge manifold of the pumping station upstream of the main control valve (as well as the low flow bypass and/or relief valves if provided). The removable strainer screen shall have a 1/16 inch 28 perforation size with 30 percent open area. The strainer body shall be ASTM A126 cast iron and the screen shall be 304 stainless steel. F. AUTOMATIC WYE STRAINER BLOWDOWN Provide a 2 inch, 115 VAC, electric motor operated, ball valve for automatic blow down of the wye strainer. Pilot or solenoid operated blow down valves are not acceptable since the dirty water soon makes them fail open. Blowdown operation shall be as follows: When the demand decrease, the station controls will open the ball valve for a preset amount of time and flush out the strainer before the second pump stops. The valve shall be rated for 400 psig working pressure and have a bronze body, a 316 stainless steel ball with a 1 1/2 inch port, and Teflon seats. The actuator shall have an 8 second cycle time, a NEMA-4 enclosure, a manual override, and a blowdown selector switch on the control panel that lights up whenever the blowdown valve is open. The blowdown valve discharge shall be piped to waste outside of pump house by manufacturer and then by others. G. LAKE INLET SCREEN ASSEMBLY A screen has been provided at the inlet of the 12 inch diameter horizontal induction tube leading from the lake to the station wet well. Make connection to the existing 1 ½ inch galvanized pipe that serves the rotating intake screen backwash. Provide a 1 ½ inch motorized ball valve for automatic backwash from the downstream side of the wye-strainer on the 6 inch discharge pipe and make connection to the existing pipe in the wet well. H. BLOW OUT TUBE Provide a 1 ½ inch threaded connection downstream of the station isolation valve for winterization. SECTION IV-STANDARD ELECTRICAL SPECIFICATIONS A. ELECTRICAL CONTROL PANEL ASSEMBLY The pumping station electrical controls shall be mounted in a multiple door NEMA-4 enclosure fabricated from 14 gauge galvanized steel. Door gaskets of closed grain neoprene sponge shall be provided around each door as an effective weather and dust seal. The interior back panel shall be fabricated from 12 gauge steel. The complete enclosure shall be painted with Industrial Grade, baked on, white, enamel, paint. Each door handle shall operate a 3 point, draw down latch and feature a key lock. All external operating devices shall be dust and weatherproof. All internal components of the panels shall be mounted on the removable back panel. Mounting screws for components shall not be tapped into the enclosure. All wiring involving internal power and control components shall be completed within this enclosure. No external cable trays or wiring thruways shall be permitted. All control circuit components shall be located behind a separate single door while all motor and main power circuit components shall be located behind the remaining doors. No water line connections shall be permitted anywhere inside the enclosure. All secondary control components shall be powered with 120 VAC or 24 VDC. Indicating pilot lights shall be transformer type using 6 volt bulbs. All control relays shall be plug in type for easy replacement. Each control relay shall be provided with an integral neon light to indicate when the relay is energized. 29 The complete control panel assembly shall be U.L. Listed as an industrial control panel to ensure operator safety. The pumping station manufacturer’s serial numbered U.L. label shall appear inside the enclosure and all applicable components used to construct the assembly shall be U.L. Listed or Recognized. Non U.L. Listed control panel assemblies are not acceptable. All wiring shall be 600 VAC rated, THW or THWN, stranded copper wire installed according to National Electrical Code standards. All wiring from the control panel to the motors shall be sized according to NEC requirements based on motor full load current. A grounding cable sized to NEC requirements shall be included in the liquid-tight conduit from each motor to the control panel. There shall be no splices between the motor starters and the motor connection boxes. All control wiring carrying more than 24 volts, shall be 14 gauge with wire numbers at all termination points. The wiring to all devices outside the control panel shall be contained in metal lined, liquid-tight conduit. B. VARIABLE FREQUENCY DRIVE The variable frequency drive shall be an Allen Bradley model 1336VT or approved equal. C. PROGRAMMABLE CONTROLLER Provide an Allen Bradley model SLC 502 programmable controller to control all functions of the station. Relays may be used for interface purposes only. Time delay relays may only be used for functions that require adjustable delay settings. The programmable controller shall have the following features: 1) A nonvolatile memory (no battery needed) which prevents program loss due to power failures. 2) An easily replaceable EPROM chip which allows program changes to be made by the factory and transmitted to the field for simple loading into the controller by the operator. 3) Status lights for power, run, error, inputs, and outputs for ease of monitoring. 4) Latching DIN rail mounts and safe disconnecting terminal strips to allow the controller to be changed in 30 seconds or less while the pumps are running in “HAND”. 5) 2 amp rated, dry contact, outputs. Triac outputs are not acceptable. 6) Environmentally designed for use in locations where electromagnetic noise, voltage spikes, high temp- urature, humidity, and mechanical shock exist. 7) The electrical panel shall be U.L. listed. The pumping station manufacturer must meet the following requirements: Factory personnel must have at least five years of programming experience, and a list of other stations which have a programmable controller and are presently operating in the field must be submitted upon request. 30 General There are three modes of operation for the variable speed drive pumping station (Automatic/Pressure, Automatic/Line Fill, Manual). The primary mode is the (automatic/pressure) mode. When in this mode, pumps are sequenced on/off with the VFD to maintain a constant system pressure. This mode of operation is standard and is the primary mode of operation. The secondary mode of operation (automatic/line fill) is for filling the system after a prolonged downtime in operation and/or for initial start-up. In this mode a pre-determined flow rate is programmed into the PLC and the VFD is ramped up accordingly in speed to maintain the programmed flow rate. The third mode of operation is the (manual) mode. When in manual, the pumps will run independent of the PLC (automatic) programming and will run continuously until a stop (off) command is given. This mode should only be used to test equipment, or, in case of PLC failure. Switches & Pushbuttons 1) Reset The reset pushbutton is used to clear all latching faults and/or to reset any VFD faults. Faults that are resettable with this pushbutton are; low suction pressure (or low lake level), low discharge pressure (line break), high discharge pressure. 2) Manual/Off/Auto This switch selects between the manual mode and the automatic mode described above. When in the (off) position, all pumps/motors are turned off. When in the (manual) mode, the VFD pump can be controlled by an external speed pot and all safety shutdowns/alarms remain active. When in the (automatic) mode, The PLC controls all functions of the constant speed pumps/motors and the VFD pump/motor. 3) Pump #_ off/on These switches allow for the control of each individual pump. When in the (manual) mode the pumps are turned on or off based on the switch switch position. When in the (automatic) mode, the switch is placed in the on position for the PLC to determine when/if that particular pump is to come on based on flow demand. 4) Line Fill/Normal This switch allows the user to select between these two modes of automatic operation. The (LineFill) mode uses a flow meter to send a signal to the PLC which then increases or decreases the VFD speed to maintain a constant amount of water to be pumped into the system. 31 5) Wye Strainer Valve - Man/Off/Auto This switch controls the positioning of the valve (open or closed). When in the (manual) position the valve will open and flush the Wye Strainer. When in the (auto) position, the valve opens when the PLC sends a signal at a pre-determined time interval. 6) Override/Active This switch allows the user to override certain alarms and/or normal shutdown periods such as low discharge pressure and/or low suction pressure. This switch is normally in the (active) mode which allows for shutdowns and alarms. 7) SpeedPot The speed pot allows for control of the VFD speed when in the (manual) mode of operation. Indicator Lights 1) Pump #_ Run Light This light indicates if that particular pump is running. If the light is flashing, the PLC has signaled the pump/motor to start but a run signal was not received. 2) VFD Fault This light indicates that the VFD has experienced a fault. The VFD has an L.E.D. readout of up to 31 individual faults. The individual faults pin point the particular problem. 3) Low Discharge Pressure This light indicates that the discharge pressure has remained below a pre-determined set point for a period of time. This would typically indicate a line break or a run out condition. 4) High Discharge Pressure This light indicates that the discharge pressure has risen over a pre-determined set point for a period of time. 5) Low Intake Level This light indicates that the lake level has fall- en below a pre-determined set point for a period of time. 6) Hour Meters Each pump/motor has individual run hour meters. The PLC selects the pump/motor with the least amount of hours for starting first and the pump/ motor with the most hours for stopping first. 32 7) Motor Overload This light indicates an overload condition for the constant speed pump/motors. System Operation 1) Automatic/Pressure When the discharge pressure falls below the start pressure set point, the VFD pump motor (#1) will start. With pump #1 running and demand increasing, eventually the VFD pump/motor will reach a maximum speed at which time the flow will continue to increase and the pressure will decrease. At that time the PLC will drop the VFD pump/motor to 3/4 speed and start pump #2 or the pump with the least amount of hours. As demand continues to increase, the VFD pump/motor increases in speed until it again reaches the maximum speed. With all pumps running and demand decreasing, pump #1 will slow to a point where it is no longer moving any water. The PLC will receive a signal from the no flow switch located on pump #1 discharge piping. The PLC will stop the constant speed pump while increasing the speed of the VFD pump/motor (#1) to maintain the set point pressure. If demand (flow) continues to fall, the VFD pump/motor (#1) continues to decrease in speed until a no flow signal is received. 2) Manual In the manual mode of operation the pumps will come on as they are turned on and remain on until turned off. When in manual mode the VFD speed is controlled by the speed pot. 3) Automatic/LineFill In the LineFill mode the VFD pump/motor (#1) receives a speed signal from the PLC based upon a pre-determined flow rate signal from the flow transducer. At that time the PLC will control the speed based on an increase of 1PSI/sec. D. FLOW SENSOR Provide an insertion type, flow sensor with a glass reinforced nylon (non-magnetic) impeller, a pennlon impeller bearing, a tungsten carbide impeller shaft, EPDM housing O-rings, and a brass and bronze housing filled with glass reinforced PPS. It shall be installed in the metering run of the discharge manifold. It shall be 400 psig rated with a maximum accuracy within 1 percent of full scale. It shall be capable of reading velocities from 1/2 to 30 FPS. The impeller shall be nonmagnetically coupled to the transducer. E. SYSTEM PRESSURE SWITCH/GAUGE Provide a NEMA-3R enclosed pressure switch/gauge with 2 set point and a 4 1/2 inch diameter dial. The low set point shall be for lead pump start, backup lag pump start, and low system pressure and the high set point shall be for backup lag pump stop. Each set point adjustment shall be made with a knob on the gauge face to allow direct setting. The switch/gauge shall be surface mounted on the side of the control panel for easy access. 33 F. CONTROL VALVE LIMIT SWITCH A single NEMA-4 enclosed, adjustable, limit switch shall be provided to detect when the main control valve (and bypass control valve if one is used) is closed, indicating a no- flow condition. The limit switch shall be control valve mounted and stem actuated. It must have a narrow fixed deadband and a high repeatability rate. Only 24 VDC power shall be permitted at the limit switch. G. LOW LEVEL CONTROLS The wet well level probes shall be 316 stainless steel, 12 VAC conductance type. Float type or high voltage conductance type probes are not acceptable. The probes shall be held straight with insulated guide rings. The low level alarm probe will end 2 feet above the bottom of the pump inlet strainers and the reset probe will be 1 foot shorter to provide a minimum reset differential. The probe holder shall be in a 2 inch threaded, cast iron and epoxy coated aluminum, water tight enclosure. The level relay shall be a 120 VAC, differential type relay with a light to indicate normal high level operation. H. POWER MONITOR The main power supply feeding the pumping station shall be equipped with a three phase power monitor. It shall detect phase loss, reversal, shift, or improper sequence. It shall also detect abnormally low voltage. A voltage adjustment, normal status light, and line side fuses mounted in puller equipped fuse holders, shall be provided. I. LIGHTNING ARRESTOR The main power supply feeding the pumping station shall be equipped with a 3 phase, 600 volt rated, watertight, silicon oxide varistor type, secondary lightning arrestor. It shall have a current of no less than 100,000 amps, a sparkover voltage rating of 1000, and a clamping voltage of no more than 2,400 at 20,000 amps (NEMA standard 8x20 uSEC. wave). It shall be bulkhead mounted on the bottom of the control panel, outside the enclosure. SECTION V-OTHER ELECTRICAL COMPONENTS A. MAIN DISCONNECT CIRCUIT BREAKER Provide an adjustable trip type, main disconnect circuit breaker for fault protection. Provide a NEMA-4 rated, through-the-door, rotary operated, disconnect handle for easy resetting and station isolation. (ON-OFF-TRIP) indications shall be provided on the circuit breaker itself and on the operating handle. B. MOTOR FUSES Provide dual element, time delay, class R rejection type fuses in each motor circuit for fault protection. The fuses shall be installed in fuse holders equipped with rejection type clips. C. MOTOR DISCONNECT SWITCHES Provide a disconnect switch in each motor circuit for easy isolation of the motors and their fuses. Each disconnect shall have a NEMA-4 rated, through-the-door, rotary operating handle. (ON-OFF)indications shall be provided on the disconnect switch itself and on the operating handle. The motor fuses listed above shall be disconnect switch mounted. No power shall be present at the fuses when the disconnect switches are in the off position. 34 D. FLOW METER/TOTALIZER Provide a NEMA-4X digital flow meter/totalizer for monitoring the flow rate, totalizing gallons used, and for shifting the flow sequencing set point range. The display shall be a black character, LCD type. Adjustable settings for pipe diameter and pulse output shall be provided. The totalizer shall be capable of counting to 2 billion gallons and it must be resetable. Both settings and the gallons total shall be held in nonvolatile memory (no battery required) and protected by a user defined password with hidden override key. The meter shall be flush mounted on the control panel with a water tight mounting plate. E. SYSTEM PRESSURE ALARMS Provide a high system pressure shutdown alarm to protect the irrigation piping from extended periods of high pressure caused by a control valve and/or relief valve failure. The alarm shall include a pressure switch, a time delay, and indicating light, and manual reset. The alarm light shall flash if high system pressure was caused by pressure trapped at no flow. The low pressure system alarm shall sense a broken pipe condition. The alarm shall include a pressure switch, a time delay, an indicating light, and manual reset. The pressure switch shall have a single set point, with a fixed differential, and a scaled knob for easy adjustment. F. MODEM INTERFACE The PLC shall have the capability of being accessed via a remote telephone modem interface device. The PLC shall incorporate the hardware necessary to have the modem communicate with the PLC. The modem shall be supplied by the pump station manufacturer and wired to the PLC interface device.