rain water harvesting systems

2.1

1

Holding Tank

• 2,000 gallon capacity
• Approximate dimensions of (72”x108”x72” tall)
• White polypropylene construction, ¾” thick thermally formed sidewalls, 1” thick routed and extrusion welded bottom (triple bead interior weld)
• Integrally welded cover with 22” access manway
• Rain water inlet, vent, level control, city water inlet, recirculation return, and pump suction flanges
• Non-metallic spray ball assembly on recirculation return line
• Encapsulated steel girths for support
  

2.2

1

Level Transmitter (continuous non-contact level indication)

• 8”-26.2ft operating range
• +/- 0.2% of span accuracy in air
• 1 mm resolution
• PVDF transducer material, NEMA 4X housing
• 4-20mA two-wire output
• Flowline brand
  

2.3

2

Recirculation Pump

• Multi-stage booster pump, T316 stainless steel/Viton wetted parts
• Max. fluid temperature of 180 degrees F
• Three phase motor, TEFC
• Designed for min. 35 gpm @ 40 psi
• Common adjustable pressure switch on output, NEMA 4X, 0-100 psi adjustable
• Pumps will have PVC isolation and check valves.
  

2.4

1

Pump Automated Discharge Valve

• PVC/Viton wetted parts
• 3-Way, true-union ball valve
• Electric actuator with limit switch feedback
• Double-L port ball
• Asahi brand
  

2.5

1

Expansion Tank

• Welded steel construction with Butyl diaphragm
• 40 gallon capacity
• Max. working pressure of 150 psig
  

2.6

4

Bag Filter (2 units 100 micron, 2 units 50 micron)

• T304SS construction, sized for #3 filter bag
• Swing bolt lid closure
• 35 gpm flow through capacity
• One case of 100 micron and one case of 50 micron bag filters included
• Shelco brand
  

2.7

1T304SS UV chamber with 254 nm wavelength bulbs.  Sized for 35 gpm minimum @ 50 bulb capacity.   Unit shall have an automatic wiper. Aqua-Azul brand.

2.8

A/R

Plumbing and valves to be sch.80 PVC with Viton seals where applicable.  Asahi brand.

2.9

1

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.
• Siemens graphic display package including touch screen for each electric device in the system to indicate its operating status.
• Long life, low voltage LED indicator lights.
• NEMA 4 electrical rating
• Painted blue, consistent with the other system components.
• UL panel labeling required
• Adjustable alarm horn with silence button
• All required controls and accessories for complete system operation
  

2.10

1

System components other than storage tank to be factory mounted and plumbed on common epoxy coated carbon steel skid.

2.11

1

Electrical conduit shall be corrosion resistant PVC with PolyTuff flexible conduit as manufactured by Hubbell.