The Rainwater Purification System include filtration and sanitization equipment and controls to filter 56,000 gallon rainwater cistern. It shall be factory skid-mounted including modularization and pre-plumbing and wiring.
2.0 EQUIPMENT DESCRIPTION for Rainwater Purification System
Spin Klin Disc Media Filtration System to include
(8) Self Cleaning disc media filter modules. The filter modules are of polypropylene construction.
Filtration system shall be rated for 145 psig maximum operating pressure
Inlet and outlet manifolds and the filter backwash manifold shall be 6-inch diameter epoxy coated carbon steel.
The filtration system shall be furnished with inlet/outlet pressure gauge. The gauge shall be minimum 2.5” diameter, liquid filled, in a stainless steel case.
Filter feed and backwash pumps:
Feed Pump: 10 HP, 460/3/60 TEFC bronze trimmed pump/motor, close-coupled end suction centrifugal with cast iron pre-strainer and stainless steel basket; 500 gpm @ 50 ft. TDH
NEMA 4X control panel with sequencing for back-wash operation and for coordination with main control panel for alarming.
Dye Storage Tank
One-piece tank, rotationally molded of linear medium or high-density polyethylene.
Finished surface of tank shall be free as commercially practicable from visual defect such as foreign inclusions, air bubbles, pinholes, craters, crazing and cracking that will impair the serviceability of the tank.
The tolerance of the outside diameter including out of roundness shall be +/- 3%.
Tank shall be 55 gallon capacity, vertical cylindrical construction with dimensions of 22” diameter x 36” tall.
Tank shall have1/2” thick bolt down polypropylene cover and include factory mounting of metering pump
Include single point float level control for reagent low level alarm
Electronic Dye Metering Pump
Automatic control with analog input
Built-in circuit protection against voltage and current upsets
Wetted parts: PVC, Ceramic, and Teflon
Supplied with multi-function discharge valve, suction strainer and injection check valve
Pulsatron model LPD4MA-VTC1
Flow Sensor for Dye Injection Control
Paddle Wheel Style Sensor
Flow Rate Range 1-20ft/s
Linearity of +/-1% of full range
Repeatability of +/-0.5% of full range
Signet model 3-2536-P1
Wet-Tap assembly 3519
T304SS UV chamber with 254 nm wavelength bulbs for sanitization on reclaimed water. Sized for 500 gpm minimum. Lamps shall output 186 mJ/cm^2 and pressure drop shall be less than 1 psig. Maximum operating pressure is 150 psig. UV light shall have automatic wiper for bulb cleaning. Aqua-Azul brand.
Plumbing and valves to be sch.40 black iron pipe where applicable.
Central system control panel containing the following:
Three phase disconnect switch to automatically cut power to the panel for servicing. Provided with lockout capabilities.
Motor protectors for recirculation pumps
Siemens series programmable logic controller (PLC) to contain ladder logic to operate the entire system.
Long life, low voltage LED indicator lights.
NEMA 4 electrical rating
UL panel labeling required
Adjustable alarm horn with silence button
All required controls and accessories for complete system operation
Rainwater Purification System components other than storage tank to be factory mounted and plumbed on common epoxy coated carbon steel skid. Level transmitter will be supplied loose for installation by others.
Electrical conduit shall be corrosion resistant PVC with PolyTuff flexible conduit as manufactured by Hubbell.
3.0 DOCUMENTATION AND OPERATING MANUALS
The equipment supplier shall furnish the following with the system, in duplicate. All documents and prints described below will be contained in the system operating manuals.
Plumbing process and instrumentation diagram (P&ID).
Electrical ladder diagrams for control panel, in accordance with accepted practices.
Complete bill of materials, including system sub components along with major components
Cross-reference between each print and the bill of materials, providing references to system components.
Operating and maintenance manuals containing descriptive information on the operation of the system, operating and troubleshooting information, spare parts, specification sheets and manufacturer’s cut sheets and service manuals.
Complete ladder and logic diagram (program) loaded into PLC
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