HomeMy WebLinkAbout32-8420-Irrigation-Pump-System_Rev_1Dennis Yarmouth Intermediate Middle School January 19, 2021
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SECTION 32 8420
IRRIGATION PUMP SYSTEM
PART 1 – GENERAL
1.1 QUALIFICATIONS
A. Qualified pump system installers must have minimum experience of four (4) years with work and
products specified herein, including:
1. Well Pump Systems
2. Variable Speed Drive Control Systems
3. Factory-Delivered Pump Stations on Skids
4. Submersible Pumps and At-Grade Pump Stations
5. Coordination with Irrigation System Installation
B. Provide minimum of three (3) References of Similar Work Experience. Fill out form below and
submit with Bid. Only Bids from Qualified Contractors shall be accepted:
1.2 WORK SUMMARY
A. Work described below includes:
1. Install new at-grade, outdoor pump station and enclosure on concrete pad as described in
these Specifications. Outdoor well pump station shall:
a. Control well pump installed under Section 32 8410 by pressure start and variable
speed.
b. Monitor liquid level in well through probes installed under Section 32 8410 for alarm
condition.
c. Provide automatic filtration and backflushing scheduled outside of overnight
irrigation watering window.
d. Deliver and monitor well water supply flow, volume, and pressure to landscape
irrigation system while sending performance data and alarm conditions back to
school Building Management System (BMS) over BACnet protocol.
e. Include redundant pressure relief and pressure reducing valves in event of control
failure.
f. Install dry well adjacent to pump station to receive pressure relief and filter backflush
discharge.
g. Include within pump station enclosure normally open (NO) hydrometer compatible
with irrigation controller (see specifications Section 32 8400).
2. Connect well discharge (from Section 32 8410) to pump station and pump station to
irrigation mainline (from Section 32 8400).
B. System Sequence of Operation
1. Irrigation Controller will calculate total irrigation demand each day based on soil moisture
sensing. Irrigation Controller will suspend irrigation if rain has fallen, is forecasted to fall,
and/or soil moisture conditions do not warrant supplemental watering.
2. Irrigation Controller will open solenoid valves in field to begin flow of water to athletic field
sprinklers. Irrigation hydrometer (Inside Pump Station) shall monitor total water used from
Dennis Yarmouth Intermediate Middle School January 19, 2021
Dennis Yarmouth Regional School District 100% Construction Documents
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32 8420 Irrigation Pump System
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well water and monitor abnormalities (leaks and breaks) to immediately shut down
damaged zones via Normally Open (NO) solenoid valve as part of hydrometer function.
3. Upon pressure drop within mainline from open solenoid valves in field, Pump Station
Pressure Transducer within Enclosure shall start well pump through Programmable Logic
Controller (PLC). Controls within Pump Station shall vary pump speed to maintain constant
outlet pressure of 80 psi leaving Irrigation Pump Station.
4. Pump Station shall provide continuous filtration of irrigation water supply. Filtration system
shall automatically backflush to not coincide with irrigation cycle (schedule during day
through time, not by pressure differential).
5. Pump Station shall monitor liquid level in well. Upon low water level in well, automatically
shut down pump to prevent motor burnout until well has sufficiently recharged with manual
reset button on control panel.
6. Set up control system to allow for manual watering at Landscape Irrigation Quick Coupling
Valves (pressure start system).
7. Upon rise in pressure to 90 psi from valves closing at end of irrigation cycle or manual
watering, Pressure Transducer shall notify Pump Station control panel PLC to shut down
well pump.
8. Pressure relief and filter backflush discharges shall be incorporated into dry well.
9. Electrical Contractor shall provide adequate circuit breakers and disconnects while
delivering appropriate power to Pump Station and Irrigation Controller. Communications
Contractor shall provide adequate communication for Pump Station and/or Irrigation
Controller for Internet Access and BMS.
10. Pump Station shall automatically shut down on following alarm faults, notifying Building
Management System and requiring manual reset at control panel: a. Loss of Power to Well
and/or Submersible Irrigation Pump
b. Loss of Phase to Well and/or Submersible Irrigation Pump
c. Low Water Level in Well (through liquid level probes, see 32 8410)
d. High Pump Temperature in Well and/or Pump Chamber
e. Filtration System Faults (Loss of Power)
f. High Pressure
g. Low Pressure
h. Overcurrent
i. Undercurrent
C. Work items specifically included are:
1. Procurement of all applicable licenses, permits, and fees.
2. Coordination of all utilities required for irrigation and water supply systems (including civil
drainage systems).
3. Verification of existing and proposed site conditions, notifying Owner’s Representative
immediately of any discrepancies.
4. Installation of all control systems specified.
5. Demonstration to Owner’s Representative that system works as specified through Irrigation
System Commissioning (Section 32 8430).
6. Maintenance and repairs during guarantee period, including first-year spring startup and
winterization.
7. Training with Owner as well as Operation and Maintenance Manual.
8. Provide optional long-term service contract (winterization, spring startup, remote
monitoring) for Owner’s consideration.
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32 8420 Irrigation Pump System
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9. Furnish all labor, materials, equipment and services required to complete well pump,
control, electrical power, and operational testing indicated in Drawings and Specifications
for pressure-activated well pump system for athletic field irrigation system.
10. Irrigation well pump as installed under Section 32 8410 shall be regulated by variable
frequency drive (VFD) located in Irrigation Pump Station.
11. Provide underground, secondary 3-Phase power supply from Pump Station in conduit
buried 24 inches below grade with warning tape 6 inches above conduit to well head where
submersible power to pump motor in well will be provided under Section 32 8410.
12. Submersible well pump motor is estimated to be 7.5-horsepower. Final horsepower to be
determined after test well results as specified in Section 32 8410.
1.3 CONSTRUCTION DOCUMENTS
A. Drawings
1. IR100 – IR203
B. Specifications
1. 32 8400 Irrigation
2. 32 8410 Irrigation Well Construction
3. 32 8420 Irrigation Pump System (This Document)
4. 32 8430 Irrigation System Commissioning
1.4 CONDITIONS
A. Review all relevant Construction Documents before submitting bid including referenced Drawings
and Specifications, as well as overall Contract Construction Documents.
B. Review existing conditions on site before submitting bid such as:
1. Topography
2. Wetlands and other Jurisdictional Area Surrounding Site
3. Unauthorized requests for extra time or compensation due to actual conditions being
inconsistent with those assumed shall not be honored.
C. Provide all equipment and subcontractors for well drilling and testing, concrete pad installation,
and appropriate tradespersons for work described in these Specifications.
D. Provide all trenching, bedding material, backfilling, and compaction for all in-ground Well Pump
Station system components.
E. Provide all testing and final adjustment of completed irrigation and water supply system including
irrigation sprinkler coverage, undue pump vibrations and noise, as well as pressure settings for
optimum and safe performance.
F. Provide Record Drawing with standards outlined in Specifications.
G. Provide Training to Owner for overall system Operations & Maintenance.
H. Provide Operations & Maintenance Manual with standards outlined in Specifications.
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I. Drawings and Specifications shall comprise single Construction Document intended to convey
design intent. Provide and install all products and materials to meet design intent conveyed by
Construction Documents whether specifically outlined or not. Apparent discrepancies or
questions of intent shall be directed in writing to Owner’s Representative for final, conclusive and
binding decision.
J. Installation work shall be performed efficiently, timely, and completely to full design intent of
Construction Documents.
K. Guarantee
1. Guarantee entire Irrigation Pump Station, parts and labor, for one (1) year from official
written date of acceptance by Owner’s Representative. Written warranty showing date of
completion and period of warranty shall be provided at completion.
2. System malfunctions occurring during guarantee period due to defective materials, poor
workmanship, or improper adjustment shall be corrected to satisfaction of Owner’s
Representative at no additional expense to Owner.
3. First-year spring start-up and winterization shall be included in system guarantee.
4. Obtain standard written manufacturer warranty of all products and materials provided
where such warranties are offered in published product data. Include these warranties in
Operations & Maintenance Manual. These warranties shall be in addition to other binding
warranties or guarantees.
1.5 UTILITIES PROVIDED BY OTHERS
A. Utilities Provided by Electrical Contractor (Refer to Division 26 Electrical).
1. Power Requirements for Outdoor Pump Station
a. 480-Volt, 3-Phase, 60-Hz for Pump Station with internal distribution panel for:
1) New Well Pump (7.5-hp, Estimated, to be determined after well testing in
Section 32 8410)
2) Automatic Filtration
3) Liquid Level Sensor Probes in Well (120-Volt)
B. Utilities Provided by Communications Contractor (Refer to Division 27 Communications).
1. Communication Requirements for Irrigation Controller
a. Ethernet CAT/5 Cable at Pump Station Location to Local Area Network (LAN) for
Communication with Building Management System.
1.7 TRADE COORDINATION
A. Coordinate with other project trades and refer to overall project Construction Documents drawings
and Specifications by section 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 27 – Communications
7. Division 31 – Earthwork
8. Division 32 – Exterior Improvements
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9. Division 33 – Utilities
1.8 APPLICABLE STANDARDS AND CODES
A. Work shall comply with applicable requirements and accepted practice as established in
recognized standards and codes published by following bodies (capitalized abbreviations used
through Specifications):
1. American Society for Testing and Materials (ASTM)
2. National Standard Plumbing Code (NSPC)
3. National Electric Code (NEC)
4. National Sanitary Foundation (NSF)
5. Underwriters Laboratories, Inc. (UL)
6. Occupational Safety and Health Administration (OSHA)
B. Comply with applicable laws, standards, and regulations of local governing authority. All local
laws more stringent than those referenced above shall take precedent.
1.9 SUBMITTALS
A. Provide electronic copies of product sheets and catalog cuts for all product specified to Owner's
Representative for approval as per Division 01.
B. Work shall not commence until all products specified are submitted and approved by Owner’s
Representative. Work shall commence only after written notification from Owner’s
Representative.
C. Product submittals shall be concise (no extraneous pages or sections) and clearly marked to
show submitted product model, type, size, etc. Submittals with extraneous pages and not marked
clearly are subject to rejection by Owner’s Representative.
D. Substitute Product Submittals
1. Provide specified product submittals "or approved equal", in which case, submit
substitution product submittal to Owner’s Representative for approval.
2. Certain manufacturer names and model numbers are used throughout Specifications,
denoting minimum standard.
3. Alternate products are acceptable when products of equal or better quality (for same bid
price) and performance are submitted and approved (by Owner’s Representative) in
procedure outlined below.
4. Substitute product submittals constitute representation that:
a. Substitute products have been thoroughly investigated and have been determined to be
equal or superior in all respects to that specified
b. Substitute products shall provide same warranties as specified products
c. Substitute products are compatible with interfacing items
d. Responsibility has transferred to system installer to coordinate substitute product
and to make all subsequent changes required in other elements of work
5. Work shall not commence until all products specified are submitted and approved in written
notification by Owner’s Representative.
E. All product installed shall be new, without defects, and of quality and performance as specified
and meeting requirements of system.
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F. Products to be submitted for approval shall include, but not be limited to:
1. Wire and Connectors
2. Pipe and Fittings
3. Conduit and Fittings
4. Grounding Equipment
5. Valves (Isolation, Check, Pressure Relief, Pressure Reducing)
6. Normally Open (NO) Hydrometer
7. Pressure Tank
8. Pump Station Enclosure
9. Pump Station Control Panel
10. Seals/Sealants
G. Schedule
1. Schedule pre-construction meeting with Owner’s Representative(s) to discuss project,
design intent, project coordination, trade coordination, submittals required, and
construction schedule.
2. Submit Schedule of all products to be furnished hereunder, indicating manufacturer, size,
and model.
3. Ensure that all of types/styles of products and installation equipment specified herein can
be furnished by manufacturer submitted.
4. Prior to submitting schedule, confirm current site conditions are as shown in Construction
Drawings.
5. At completion of installation, contact Owner’s Representative to arrange for punchlist site
visit to observe installation, operation, irrigation coverage (under Section 32 8400), and
system performance.
6. One-year guarantee of system shall not commence until all punchlist items have been
addressed and Irrigation System Commissioning requirements have been fulfilled (see
Section 32 8430).
1.10 DELIVERY, STORAGE AND HANDLING
A. Do not deliver materials to site, until all specified submittals have been submitted to, Owner’s
Representative for approval.
B. Coordinate with Owner’s Representative for temporary storage and staging areas.
C. Protect materials from damage from construction traffic, weather, corrosion, other trades, and
other causes while stored on-site. Store and handle all products and materials in compliance with
manufacturer instructions and recommendations.
D. Minimize on-site storage where possible. Coordinate with site supervisor for storage options.
E. All material overages at installation completion shall be removed from site.
PART 2 – PRODUCTS
2.1 DRY WELL
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A. Concrete Dry Well
1. Size: 6-foot Diameter, 4-foot, 6-inch Deep (700 Gallons)
2. Construction: Concrete (28-Day Strength = 4,000 psi)
3. Ratings: H-20 Rated Loading
4. Features: 20-inch diameter top opening, covered with 24-inch cast iron cover brought to
finish grade
a. Surround Dry Well with Crushed Stone (1-Inch Minimum)
b. Surround Crushed Stone with Landscape Fabric (see below)
5. Manufacturer: E.F. Shea Concrete; or Approved Equal.
2.2 PUMP STATION
A. Pre-Packaged Pump Station
1. Provide following equipment:
a. Submersible Irrigation Pump in Well
b. Variable Frequency Drive (VFD) controls for:
1.) Well Pump in Well
c. NEMA 12 Outdoor Enclosure
d. Additional Controls for:
1.) Automatic Filtration
2.) Well Low-Level Cut-Out Switch
e. Integral Pipe and Fittings
f. Valves
g. Pressure and Flow Sensors
h. Programmable logic controller (PLC)
i. UL 508A listed control panel
j. Irrigation Controller Master Valve and Flow Sensor(s) as described above
k. All appurtenances necessary for complete and functioning pumping system.
2. Pump station shall be mounted to press brake formed steel base and enclosed in powder-
coated marine grade aluminum enclosure.
3. Pump station shall be manufactured by UL QCZJ certified pump station manufacturer, such
as Precision Pump Systems, Inc., or approved equal.
B. Technical Service and Support
1. Manufacturer shall provide access 24/7 phone support with factory certified technician.
2. Technician shall have access to all relevant data specific to pump station, including
Specifications, submittal, shop drawings, programming, and detailed photos of system.
C. Factory Testing
1. Pump station shall undergo and pass all of following system performance tests:
a. Hydrostatic testing that meets ANSI/HI Specifications and standards
b. Flow testing that meets ANSI/HI 14.6 Specifications and standards
c. Vibration testing that meets ANSI/HI 9.6.4 Vibration Measurement and Allowable
Values Specifications and standards
2. Pump system shall be flow tested as complete unit, which shall include function testing of
pumps, motors, instrumentation, appurtenances, and control panel. results of all tests shall
be available to Owner’s Representative.
2.2 PRODUCTS
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A. Pipe, Valves, Skid Base, & Station Enclosure
1. Pipe
a. Pump Station pipe shall be standard wall pipe with grooved connections.
b. Flanged or welded connections shall not be acceptable.
c. Threaded connections between main pipe sections other than at pump volute shall
not be acceptable.
2. Valves
a. Butterfly style isolation valves with grooved connections shall be included on station
suction and discharge piping.
b. Flanged or threaded connections shall not be accepted.
c. Non-slam check valve shall be included on discharge of each pump.
d. Air release valve shall be included, located immediately after pump check valve.
e. Pressure relief valves shall be provided with discharge to adjacent stormwater
drainage system or dry well.
3. Skid
a. Pump Station skid shall be made of 1/4" press broke A36 steel.
b. No welded bases or open rail systems shall be acceptable.
4. Corrosion Protection
a. Pump skid and appurtenances shall be cleaned to bare steel and coated with baked-
on powder coating, all piping including elbows shall be coated inside and out.
b. Pump station shall be pressure tested prior to coating. No welding shall be
performed after pump station is powder coated.
5. Station Enclosure
a. Pump station enclosure shall be constructed of marine grade aluminum modular
panels to allow access to all pumps and components by simply removing any panel.
b. Entire front of enclosure shall consist of hinged doors.
c. Enclosure shall be powder coated.
d. Roof of enclosure shall be easily displaced and replaced by one person for purpose
of servicing pump station.
e. Pump Station enclosure shall include ventilation fan (or fans) appropriately sized to
adequately cool enclosed equipment.
6. Automatic Filter
a. Pump Station shall include an automatic screen filter.
b. Filter shall use suction scanning devices to automatically remove debris from filter
element by scheduled time interval to not interfere with overnight watering window.
c. Filter shall be VAF200 or approved equal.
d. Control logic for filter flush shall be included as part of main control panel PLC
programming. Program backflush outside of irrigation watering window each day
(generally, during the day). Do not set backflush based on pressure differential)
B. Pump Control System
1. NEMA Rating
a. VFD, PLC, and associated electrical equipment shall be mounted in NEMA 12
enclosure rated for indoor installation.
b. To avoid potential water or rodent damage, VFDs mounted outside main control
panel are not acceptable.
2. Control Panel Manufacturing & Testing
a. Pump control panel shall be manufactured and listed by UL508A Panel Shop.
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b. Panel shall be UL labeled as an "Enclosed Industrial Control Panel".
c. Pump control panel shall be completely manufactured, tested and programmed prior
to delivery to site.
3. Documentation
a. Color wiring schematic and pump nameplate information shall be permanently
affixed to inside of control enclosure.
b. All field terminal connections shall be numbered and labeled.
4. Cooling System
a. Control panel cooling system shall be appropriately sized for ambient conditions.
b. Cooling system shall not allow dust, insects or rodents inside pump control panel.
c. Two sets of spare filters shall be included with pumping system.
5. Main Disconnect
a. Service-entrance rated, non-fused disconnect shall be mounted in pump control
panel and shall isolate all power to control panel.
b. Disconnect shall include an operating handle mounted on control panel enclosure
door that is mechanically interlocked to prevent entry while disconnect is in ON
position.
c. To prevent damage from vandalism, disconnect external to pump station enclosure
shall not be accepted.
6. Overcurrent Protection
a. VFD bridge rectifiers shall be protected from over current by an appropriately sized
circuit breaker.
b. Fuses are not acceptable.
7. Lightning & Surge Protection
a. Pump Control Panel shall be equipped with transient voltage and surge arrestors.
8. Variable Frequency Drive (VFD)
a. VFD shall be appropriately sized to meet FLA (full load amps) required by pump
motor, as stated on motor nameplate.
b. VFD shall be manufactured by ABB Industrial Systems, Mitsubishi, or approved
equal.
c. Initial start-up and calibration shall be performed by factory certified technician,
which shall extend warranty on control panel to total of three (3) years.
9. Programmable Logic Controller (PLC)
a. PLC shall be fully programmed prior to pump panel installation.
b. Technician installing and programming PLC is to be factory trained and certified by
PLC manufacturer.
c. PLC programming shall be non-proprietary, and complete station programming shall
be made available to Owner’s Representative via USB drive included with station
control panel.
10. PLC Operator Interface
a. PLC shall be equipped with 5.7-inch LCD color touchscreen.
b. Operator interface shall allow user to make adjustments to PLC program locally
without requiring any additional equipment such as laptop computers.
c. VFD control keypad is not acceptable substitution for digital operator interface.
d. PLC shall have Ethernet port to enable remote access.
11. PLC Control Functions
a. User settable Local or Remote control.
b. System Pressure Setpoint
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c. Pump Sleep Settings, with two threshold modes: Sleep by Flow or Sleep by
Frequency
d. System Protection Settings, including fault and warning parameters for low flow, high
flow, low pressure, high pressure, restart trials and restart delay time.
e. Load Factory Default Settings, User Saved Default Settings.
f. Pre-Programmed Start-Up Routines to limit and/or delay starting and acceleration
of pump to eliminate excessive velocity and pressure.
g. It shall also include initial start-up, mainline fill, power outage and automatic restarts.
12. PLC Monitoring Functions
a. Pump operating status, total pump run hours, motor frequency, motor amperage
b. System pressure, flow rate
c. Fault Log with time stamps and diagnostic utility.
d. Trend Data, with graphic display of system pressure, flow, motor frequency and
amperage. Data shall be exportable to MS Excel.
e. USB port to upload, download of program, and data storage.
13. Instrumentation
a. Pressure Gauges shall have 304SS stainless steel case, with bezel construction.
Gauges shall have 2.5-inch diameter and be liquid filled.
b. Pressure Transmitter(s) shall be constructed of stainless steel and rated for pump
station discharge pressure.
14. Flow Meter
a. Pump station shall include solid-state insertion flow meter. Paddle type insertion sensors
shall not be accepted.
15. Liquid Level Controls
a. Pump station shall include all controls to fill pump chamber with well pump at rate
equal to or greater than irrigation outflow upon low water level in pump chamber.
b. Pump station manufacturer shall provide level transducer with specifications above.
16. Vacuum Primer Pump
a. Pump station shall include an automatic vacuum primer pump system.
b. System shall automatically maintain prime for irrigation pump.
17. Insertion Flow Meter
a. Pump station shall include programmable NMP insertion flow meter with an
accuracy of 7% MW + 2% MEW.
b. Flow meter shall include digital display on meter body as well as 4-20 mA outputs
for remote display and operations.
c. All wetted parts shall be 316 stainless steel.
d. Paddle and propeller meters are not acceptable.
18. Communications to School BMS
a. Pump Controls shall relay flow, pressure, and fault alarm data to School Building
Management System through BACnet protocol.
PART 3 – EXECUTION
3.1 PROCEDURE
A. Notify all town departments and/or public utilities with jurisdictional authority, of time and location
of any work that may affect them. Cooperate and coordinate with them in protection and/or repairs
of any utilities.
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B. Provide and install temporary support, adequate protection and maintenance of all structures,
drains, sewers, and other obstructions encountered. Where grade or alignment is obstructed,
obstruction shall be permanently supported, relocated, removed or reconstructed as directed by
Owner.
END OF SECTION 32 8420
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