minimum design & construction standards - Martin County, Florida

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c) Electrical Wiring 1. Contractor shall utilize wiring supplied with the remote mount kit. Mount indicator (TR28) on the RCP. Wire is supplied and terminated from the meter head to the Indicator/Totalizer (TR28). Wire is also supplied to terminate at the RTU. 2. Grounding Grounding system meeting a minimum resistance of 5 Ohms or less shall be installed at each transmitter location. Ground rods shall be 5/8” diameter X 8’0” copper clad steel. Connectors shall be solid copper clamps with connecting wire at least one size larger than any other wire on the same device. The number and pattern of ground rods shall be chosen to provide the required maximum resistance. d) Transmitter Indicator/Interface The flow transmitter (TR28) shall be connected to a device, the Indicator/Interface, in the Reuse Control Panel that interprets the digital signal and provides a signal that will interface with the control system and a visual display of the flow rate 1. Mounting The Indicator/Interface will be supplied, installed and wired as part of the control panel by the RCP manufacturer and mounted on an inner dead-front door. 2. Wiring All power supply, sensor, and interface output wiring shall be made in a work like manner conforming to the National Electric Code and local ordinances. All wiring shall be color-coded or tagged to maintain functionality and polarity. Any wire connections shall be made to screw type terminal strips using crimp on spade lug connections of the appropriate size. e) Start-up Procedure When the installation is complete, the equipment manufacturer’s representative shall verify that all the equipment has been installed and transmitter/monitors have been correctly programmed. With the system running, the equipment manufacturer’s representative verify output signals from each sensor, inputs to transmitter/monitors and correct transmitter outputs. 1. A 8-hour time window (7days a week) for irrigation will be set at all site Reuse Control Panels, beginning at 10:00 PM and finished by 6:00 AM. Martin County must approve any deviation from this schedule. 65
4. Automatic Control Valve The Automatic Control Valve shall maintain a maximum (adjustable) flow rate regardless of changes in demand or inlet pressure variations. The valve will also modulate to maintain a constant (adjustable) downstream pressure. The valve shall be equipped with a solenoid intercept that will close the valve drip-tight upon actuation. Valve manufacturer for pilot set points and individual orifice bore sizes shall determine control ranges. The valve shall be equipped with an orifice bore assembly that will fit between two standard pipeline flanges; no pilot tubes shall be allowed. The valve shall be hydraulically operated, diaphragm actuated, and angle pattern. The valve shall be single chamber with a single diaphragm. The diaphragm assembly shall be the only moving part and shall form a sealed chamber between the valve body and cover, allowing for a separation of operating pressure and pipeline pressures. Internal packing glands are not permitted within the main valve. The valve body shall be stainless steel* construction with stainless steel trim. The valve shall have 125/150 lb. flanged ends (stainless valves shall have steel flanges). The valve must be fully serviceable in the pipeline, and the diaphragm may not be used as a seating surface. The main valve and controls shall be manufactured in the United States of America. * Valves 4” and larger to have stainless steel body. Valves 3” and smaller to be cast iron epoxy coated on the inside and outside with stainless steel trim. The main valve shall have a single removable stainless steel seat that seals against a resilient, synthetic rubber disc. This disc shall have a rectangular cross section and be surrounded on three and one-half sides of the cross section by the module formed by the disc retainer and the stainless steel contoured disc guide. No O-ring type discs shall be permitted as the seating surface interface. The main valve stem shall be fully guided at both ends by a bearing in the valve cover and an integral bearing in the stainless steel seat. The seat shall have a five-degree higher taper on the seat diameter, so as to insure drip tight shut off. The cover bearing shall be aligned so as to permit freedom of movement of the diaphragm assembly; center guides in a single chamber valve are not permitted. Machined surfaces in the body and cover shall fully support the diaphragm throughout the valve stroke and over the entire 360 degrees of the diaphragm radius. The flexible, nonwicking diaphragm shall be FDA approved and consist of nylon fabric bonded with synthetic rubber compatible with chlorinated reuse water. The center hole accommodating the main valve stem must be sealed by vulcanized rubber grommet. The diaphragm must withstand a Mullins Burst Test of a minimum of 600 psi per layer of nylon fabric and shall be cycle tested 100,000 cycles to insure material longevity. The control valve shall utilize a solenoid valve operating at 120 VAC for opening and closing of the control valve. Additional manually operated ball valve(s) shall be plumbed in parallel with the solenoid valve to allow manual means to open and close the control valve in case of failure of the electrical devices. 66
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MINIMUM DESIGN & CONSTRUCTION STAND
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10. Manholes 23 11. Inspection and
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4. Water Source 72 5. Preparation o
Page 7 and 8:
) Location of Easements Easements s
Page 9 and 10:
SECTION II - DESIGN GUIDELINES The
Page 11 and 12:
1. Design SECTION III - POTABLE WAT
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Horizontal separation of 15 feet to
Page 15 and 16:
Gate valves shall be ductile iron,
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Hydrants shall be placed within 15
Page 19 and 20: 2) Intermediate Series 66 Epoxoline
Page 21 and 22: B) Any pavement cut shall be replac
Page 23 and 24: C) Preconstruction Meeting: Upon ap
Page 25 and 26: SECTION IV - SEWAGE SYSTEMS AND GRA
Page 27 and 28: Sewer mains shall be laid accuratel
Page 29 and 30: Adjustment to proper grade shall be
Page 31 and 32: The sewer main, house laterals and
Page 33 and 34: Joints for ductile iron pipe shall
Page 35 and 36: AWWA C-500, latest revision. Valves
Page 37 and 38: to provide advance notification of
Page 39 and 40: 12. Horizontal Directional Drilling
Page 41 and 42: SECTION VI - SEWAGE PUMPING STATION
Page 43 and 44: TNEMEC 1) Primer: TNEME-ALUMINUM MA
Page 45 and 46: panel's control circuitry, shut dow
Page 47 and 48: eceptacle shall be used as manufact
Page 49 and 50: ) Radio. and the floats will contro
Page 51 and 52: 1. General SECTION VII - RECLAIMED
Page 53 and 54: A minimum 5 foot horizontal separat
Page 55 and 56: Coat: Urethane or equal (2.0 to 3.0
Page 57 and 58: 9. Reclaimed Water Service Lines an
Page 59 and 60: shopping centers, Developer's Engin
Page 61 and 62: for sizes 12” diameter through 16
Page 63 and 64: controller/display panel. The Depar
Page 65 and 66: • Level sensing devices require a
Page 67 and 68: 1. General Section VIII Pressurized
Page 69: 3. Reuse Water Sensor a) Sensor Sel
Page 73 and 74: SECTIONS IX, X RESERVED FOR FUTURE
Page 75 and 76: A. Water, Force, and Reclaimed Wate
Page 77 and 78: 1. Scope SECTION XII - SODDING The
Page 79 and 80: emoved from the work. 8. Watering T
Page 81 and 82: A. WATER 1. FIRE HYDRANTS SECTION X
Page 83 and 84: 11. CORPORATIONS 1. Ford 1" FB1000G
Page 85 and 86: 2. American Flow Control Series 250
Page 87 and 88: 5. Clow F 5345 6. MECHANICAL JOINT
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minimum design & construction standards - Martin County, Florida

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