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HomeMy WebLinkAbout32-8440-Irrigation-System-Commissioning_Rev_0Dennis Yarmouth Intermediate Middle School January 19, 2021 Dennis Yarmouth Regional School District 100% Construction Documents Perkins Eastman DPC, Project #71011 32 8440 Irrigation System Commissioning 1 of 7 SECTION 32 8440 IRRIGATION SYSTEM COMMISSIONING PART 1 - GENERAL 1.1 DESCRIPTION A. Upon completion of irrigation system construction, provide commissioning of irrigation system for water consumption and conservation, electrical work, and controls for proper operation. 1.2 ADDITIONAL WORK REQUIRED A. Items of work specifically included are: 1. Review Project Irrigation Plans, Details, and Specifications (32 8400) 2. Review Basis of Irrigation Design 3. Review Operation and Maintenance Manual, As-Built Plans, Manufacturer and Installer Guarantees at project closeout 4. Observe End-User Training and/or Operation and provide comment 1.3 QUALIFICATIONS A. Qualified irrigation system commissioners must have a minimum experience of five (5) years with irrigation systems described in original design documents, and also: 1. Irrigation Association (IA) Certification / EPA WaterSense Partner 2. Irrigation Controller Manufacturer Certification 3. IA Certified Landscape Irrigation Auditor B. Submit three (3) references for similar work performed in the last five (5) calendar years, including: 1. Contact name 2. Company Name 3. Contact Phone Number 4. Project Name and Location 5. Brief Project Description 1.4 IRRIGATION SYSTEM DESCRIPTION A. Irrigation System is a new, two-wire irrigation system with its own controller and water supply. Irrigation system is expandable for up to Phase 1 as shown on the Drawings. B. Sprinkler head placement and throw radius shall be better than head-to-head coverage. Dennis Yarmouth Intermediate Middle School January 19, 2021 Dennis Yarmouth Regional School District 100% Construction Documents Perkins Eastman DPC, Project #71011 32 8440 Irrigation System Commissioning 2 of 7 C. Well water supply is controlled and monitored through Irrigation Pump System (Section 328420). D. Irrigation system has drain and blow-out port for winterization. E. Installer shall provide training to Owner/Operator on irrigation system and remote management through Internet-based platform through cellular service (Internet-based management is optional). 1.5 AVAILABLE UTILITIES TO BE VERIFIED A. Water Service Point of Connection 1. New well water service shall provide dynamic pressure of 70 psi within athletic fields. Estimated flow rate shall be 60 gpm. 2. Approximate point of connection from Irrigation Pump System is located on Drawings. 3. Irrigation Equipment Includes: a. 2-Inch Brass Normally Open Irrigation Master Valve b. 4-20 mA Pressure Sensor Decoder Kit c. 2-Inch Brass Flow Sensor B. Electrical Power Source to New Outdoor Controller 1. NEW ELECTRICAL CIRCUITS TO BE PROVIDED BY ELECTRICAL CONTRACTOR (REFER TO DIVISION 26 ELECTRICAL). a. Power Requirements for Irrigation Controller 1) 120-Volt, 1-Phase, 60-Hz, 20-Amp Breaker 2) Irrigation Controller has internal transformer for 24VAC valve wire 3) GFCI Receptacle within Irrigation Controller Enclosure b. Conduits 1) Provide minimum Schedule 80 PVC conduits through Irrigation Controller pedestal concrete pad with long elbow sweeps and under all hardscape through sleeves. C. Internet for Outdoor Controller D. Pipe Sleeves 1. Pipe sleeves to be provided by Earthwork Contractor beneath all hardscape, as indicated on Construction Drawings. a. Pipe sleeve requirements 1) Two (2) parallel 4-inch Schedule 40 PVC 2) Extend 18 inches beyond edge of hardscape 3) Minimum cover: 18 inches Dennis Yarmouth Intermediate Middle School January 19, 2021 Dennis Yarmouth Regional School District 100% Construction Documents Perkins Eastman DPC, Project #71011 32 8440 Irrigation System Commissioning 3 of 7 1.6 RELATED DOCUMENTS A. Refer to overall project Construction Document Specifications and Drawings, including, but not limited to: 1. Division 01 – General Requirements 2. Division 02 – Existing Conditions 3. Division 03 – Concrete 4. Division 22 – Plumbing 5. Division 26 – Electrical 6. Division 31 – Earthwork 7. Division 32 – Exterior Improvements a. 32 8400 – Irrigation b. 32 8420 – Irrigation Pump System 8. Division 33 – Utilities 9. Construction Drawings 1.7 PRE-COMMISSIONING PROCEDURE A. Define and Review Planting Irrigation Scope of Work 1. Owners Project Requirements 2. Basis of Design 3. Extent of Construction with Phasing 4. Maintain Log of Communication between Installer and Designer including: a. Requests for Information (RFI) b. Design Plan Redline Markups c. Substitutions and Field Changes B. Final Commissioning of Irrigation System shall not commence until Planting Irrigation System installation is complete as determined by Designer through punchlist site visit. C. Commissioning Agent shall receive and review final closeout documents from Installer prior to commissioning as specified in 32 8400: 1. Operation & Maintenance Manual (see 32 8400 for Table of Contents) 2. As-Built Irrigation Plans 3. Original Design Plans with Redline Markups 4. Installer Guarantee 5. Product Manufacturer Warranties D. Project will be installed in phases. Commissioning shall be performed at conclusion of each phase to ensure continuity of operation between current and previous phases. Dennis Yarmouth Intermediate Middle School January 19, 2021 Dennis Yarmouth Regional School District 100% Construction Documents Perkins Eastman DPC, Project #71011 32 8440 Irrigation System Commissioning 4 of 7 PART 2 - PROCEDURE 2.1 COMMISSIONING PROCEDURE A. Review Irrigation Controller Settings and ensure: 1. All Electric Zone Valves are connected to irrigation controller. Provide wire resistance readings to ensure all solenoids are within acceptable range of resistivity (turn off irrigation controller prior to reading): a. 0 – 6 ohms = Short Circuit b. 6 – 20 ohms = Slow Burn (Check Number of Solenoids Tied Together) c. 20 – 60 ohms = Acceptable d. 60 – 200 ohms = Partially Open Circuit e. 200+ ohms = Broken Wire 2. All Controllers, Sensors, and Decoders are grounded to earth (or building earth) with resistance readings of less than 10 ohms. 3. All Electric Zone Valves are assigned to a watering program with set run-time for peak watering requirements. 4. All Programs are assigned automatic water savings protocols, including: a. Soil moisture sensors allowing for sufficient soil drying prior to next irrigation cycle. b. Weather sensors, on-site or through web-based application, to apply or suspend watering based on real-time climate conditions. c. Rain sensors to immediately suspend irrigation during and after rainstorms. 5. Irrigation Master Valve is installed and appropriate orientation a. Normally Open (NO) for this site b. Connected electrically to Irrigation Controller c. Irrigation Controller programmed to enable Master Valve closing upon abnormal flow range. 6. Irrigation Flow Sensor is installed with appropriate orientation a. Connected electrically to Irrigation Controller b. Irrigation Controller programmed to provide real-time feedback on flow sensing c. Irrigation Controller allowed to “learn flow” of each Electric Zone Valve and manual watering d. Irrigation Controller programmed to close Master Valve within 3 minutes on abnormal flow outside of learned flow (typically 10%-15% tolerance). 7. Irrigation 4-20 mA Pressure Sensor is installed with appropriate orientation a. Connected electrically to Irrigation Controller b. Irrigation Controller programmed to provide real-time feedback on pressure sensing Dennis Yarmouth Intermediate Middle School January 19, 2021 Dennis Yarmouth Regional School District 100% Construction Documents Perkins Eastman DPC, Project #71011 32 8440 Irrigation System Commissioning 5 of 7 c. Irrigation Controller programmed to close Master Valve within 3 minutes on abnormal pressure outside of learned flow (typically 10%-15% tolerance). 8. Irrigation Controller Remote Management a. With web-enabled device (smart phone, tablet, desktop or laptop computer), verify connectivity with internet and ensure all settings above have been programmed properly. b. Ensure all alerts through Short Messaging Service (SMS) or other communication are received through email or text messaging to appropriate site managers. c. Ensure all alerts are properly programmed for notification, including, but not limited to: 1) High Flow / Low Flow 2) High Pressure / Low Pressure 3) Wire Breaks / Connectivity Issues 4) Internet / Data Loss 5) Request for Spring Startup (programmed through controller by date) 6) Request for Winterization (programmed through controller by date) d. Take Screenshots of Irrigation Controller graphical user interface (GUI) with settings and performance. e. Observe Irrigation Controller GUI during test cycle of Irrigation System and observe: 1) Flow Readings 2) Zone Operation 3) Pressure Readings 9. Take computer screenshots of irrigation controller, graphical user interface (GUI), and internet connectivity of on-line web-enabled devices. 10. Take pictures of irrigation controller location and mounting, interior controller wiring, grounding wire and earth ground location. 11. Report all deficiencies in system that do not meet design intent or have missing information above. B. Review Irrigation Wiring 1. All Wire Splices in planted landscape are made with DBY-6 Submersible-Rated Wire Splice Kits. 2. Within each valve box, ensure that there is sufficient wire slack for servicing. 3. Within each valve box, ensure that decoders are not buried and are operational through LED lights. 4. Observe all landscape grounding rod and/or plate installations with exothermic welds to bare copper wire as specified in design documents. Dennis Yarmouth Intermediate Middle School January 19, 2021 Dennis Yarmouth Regional School District 100% Construction Documents Perkins Eastman DPC, Project #71011 32 8440 Irrigation System Commissioning 6 of 7 C. Review Irrigation Pipe and Valve Installation 1. Valve Boxes (Plastic or Polymer Concrete) a. Ensure all Valve Boxes are flush with grade with colors as specified by Owner and Designer b. Ensure all Valve Boxes are bolted down. Remove lid with appropriate ratchet tool for observation. c. Ensure all Valve Boxes are clean with level bases of stone and that no components are buried. 2. Electric Zone Valves a. Ensure all Electric Zone Valves have Schedule 80 PVC NPT fittings in and out of valve. b. Where specified, ensure Electric Zone Valves have isolation gate valves for servicing. c. Where specified, ensure Electric Zone Valves have Schedule 80 PVC unions on each side for appropriate servicing 3. Isolation Gate Valves a. Ensure all Isolation Valves are gate valves and not ball valves. b. Ensure all Isolation Gate Valves have cross handles and not wheel handles. c. Ensure all Isolation Gate Valves have Schedule 80 PVC NPT fittings in and out of valve. 4. Quick Coupling Valves a. Ensure all Quick Coupling Valves have rubber covers as specified. b. Ensure stabilization wings are installed on Quick Coupling Valve swing joint. c. Observe that all Quick Coupling Valves are engaged with a key. d. Ensure Owner has sufficient number of keys to engage all Quick Coupling Valves. D. Review Sprinkler Operation 1. Installation a. Ensure all Sprinklers are installed flush with grade with minimum 2-inch separation from all hardscape surfaces. b. Ensure all Sprinklers have specified and designed pop-up height, either: 1) 4-inches 2) 6-inches, or 3) 12-inches c. Where stainless steel risers are specified, ensure those components are installed. d. Ensure proper nozzles are installed on sprinklers. e. Ensure all Sprinklers are clearly marked on their covers with: Dennis Yarmouth Intermediate Middle School January 19, 2021 Dennis Yarmouth Regional School District 100% Construction Documents Perkins Eastman DPC, Project #71011 32 8440 Irrigation System Commissioning 7 of 7 1) Manufacturer 2) Model 3) Pressure Ratings 4) Additional Features a) Check Valve b) Pressure Regulation c) Wiper Seal Technology f. Observe Sprinkler Operation under test irrigation cycle 1) Ensure head-to-head or better coverage. 2) Observe pressure readings during test to ensure design intent is met. 3) Observe sprinkler stream to ensure proper water droplet breakup: a) High Pressure = Atomizing and Misting b) Low Pressure = Single Stream 4) Ensure overall coverage of landscape. 5) Observe and comment on overspray onto hardscape surfaces. PART 3 - EXECUTION 3.1 REPORTING A. Provide written report and findings of deficiencies in the irrigation system compared with design, design intent, and built system. B. Report shall include pictures of system (both adequacies and deficiencies). C. Report shall be included as part of O&M Manual for future reference. D. All deficiencies shall be remedied as required by design plans, specifications, and commissioning observations prior to final payment and start of guarantee period. END OF SECTION 32 8440 (THIS PAGE IS BLANK)