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Summary of Contents for Nelsen Corporation NRO 2540
- Page 1 Nelsen NRO 2540 Commercial Systems Installation, Operation & Maintenance Manual Systems manufactured after May-2017 Including Models NRO-12540-700 NRO-22540-1400 NRO-12540-700-WM NRO-22540-1400-WM...
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Page 3: Table Of Contents
Table of Contents System Specifications Page 2 ....................................................................... Introduction Page 3 ..............................................................................Feed Water Requirements Page 4 ..................................................................RO Membranes Page 5 ............................................................................ Recovery & Rejection Page 6 ......................................................................System Requirements & Operation Guidelines Page 6 ................................................... RO Start-Up Page 7 .............................................................................. -
Page 4: System Specifications
System Specifications Nelsen Commercial Reverse Osmosis System Specifications Model Type Floor Stand Floor Stand Wall Mount Wall Mount Model Number: NRO-12540-700 NRO-22540-1400 NRO-12540-700-WM NRO-22540-1400-WM Production GPD 1400 1400 Membrane 2-1/2" x 40" (1) 2-1/2" x 40" (2) 2-1/2" x 40" (1) 2-1/2"... -
Page 5: Introduction
Introduction Nelsen Corporation’s commercial reverse osmosis to pass through to Point of Use (POU). Reverse NRO systems produce high quality water. The osmosis is considered to be the finest filtration system is durable and with proper care will last process and was developed as a method for the for many years. -
Page 6: Feed Water Requirements
Feed Water Requirements Feed water quality has a huge effect on the is predicted by the Langelier Saturation Index (LSI). performance of the reverse osmosis system. It is The LSI should be zero or negative throughout important to supply the reverse osmosis system with the unit unless approved anti-scalents are used. -
Page 7: Membranes
Reverse Osmosis Membranes • Reverse Osmosis Unit: Required for the production Table 3: Typical Rejection Characteristics of treated water, as per the daily requirements. of Reverse Osmosis Membranes Different capacities of the unit are available Sodium 85-94% depending on the rate of production of purified Lead 95-98% water. -
Page 8: Recovery & Rejection
The motor is available is a 110/220, 60 hertz single phase. Each NRO system is equipped NOTE: Nelsen Corporation recommends with a 6 foot electrical cord. that a license electrician install your unit in accordance to local and national codes. -
Page 9: Ro Start-Up
RO Start-Up • Locate the permeate tubing Pump • Attach the permeate tubing to permeate outlet. The pump must never run dry. Operating the pump Make sure the permeate water flows freely and without adequate feed water will damage the pump. that there is no back-pressure. - Page 10 prepare chemical dosing tanks by mixing proper valve as needed to maintain the design operating ratio of chemicals (anti-scalant reagents, sodium conditions while the system stabilizes. Verify that metabisulfite, etc.) with water. Check the operation any additional equipment is operating properly by of the chemical injection pumps and delivery lines.
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Page 11: Operation & Maintenance
Operation & Maintenance Check your feed water chemistry. Pre-treatment and/ Prefilter Pressure Gauges or reducing the system recovery may be required to These gauges measure feed water pressure when reduce fouling and scaling on membranes. it enters and exits the prefilter housing. A pressure RO process causes concentration of impurities in the differential of 10% or more indicates the prefilter concentrate stream to increase. - Page 12 • Thread a nipple and tee into the concentrate • Reattach any fittings that may have been port. The nipple must extend past the end of the disconnected in the process. pressure vessel. Apply slight force to remove end • Refer to start-up directions to start system. caps.
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Page 13: Membrane Cleaning
Membrane Cleaning Periodic cleaning of membranes can improve system • Solution of 1.0% sodium triphosphate (STP), 1.0% performance. In normal conditions, mineral scale, trisodium phosphate (TSP) and 1.0% Na-EDTA biological matter, colloidal particles and organic The pH of the solutions above should be substances can foul membranes. -
Page 14: Spare Parts
7. Turn the system on and flush at 50 psi (3.5 bar) NOTE: The prefilter cartridge should be for 15 minutes. Discard all of the permeate and replaced before AND after the cleaning is concentrate water. disinfection procedures. 8. Adjust the system to normal operating pressure 1. -
Page 15: Troubleshooting
Nelsen Commercial NRO 440 Series Systems Troubleshooting SYMPTOMS POSSIBLE CAUSES CORRECTIVE ACTION Low supply pressure <35 psi Increase inlet flow pressure to >35psi Cartridge filter plugged Change filters Solenoid valve malfunction Replace solenoid valve and/or coil Leaks Fix any visible leaks Low Inlet Pressure Motor may not be drawing correct Use clamp-on amp meter to check motor... -
Page 16: Operation Log
OPERATION LOG Model Number: Start-Up Date Week of: Last Cleaning Date Date Time Hours Of Operation Inlet Pressure Post Pre-Filter Pressure Pressure Differential Permeate Pressure Feed Pressure First Array Feed Pressure Differential Pressure Permeate Flow Concentrate Flow Percent Recovery Feed Flow Feed Conductivity Permeate Conductivity Percent Rejection... - Page 17 OPERATION LOG Model Number: Start-Up Date Week of: Last Cleaning Date Date Time Hours Of Operation Inlet Pressure Post Pre-Filter Pressure Pressure Differential Permeate Pressure Feed Pressure First Array Feed Pressure Differential Pressure Permeate Flow Concentrate Flow Percent Recovery Feed Flow Feed Conductivity Permeate Conductivity Percent Rejection...
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Page 18: Warranty
NRO COMMERCIAL REVERSE OSMOSIS SYSTEM LIMITED WARRANTY Nelsen Corporation (“Nelsen”) provides this limited warranty as described below (the “Limited Warranty”). Limited Warranty Subject to the terms of this Limited Warranty, Nelsen warrants to the original buyer (“Buyer”) of this Water Conditioner product (the “Product”) solely from a Nelsen authorized dealer that the Product will be free from defects in material or... - Page 19 upon request. TO BE ELIGIBLE FOR COVERAGE UNDER THIS LIMITED WARRANTY, BUYER MUST SUBMIT A CLAIM WITHIN SIXTY (60) DAYS OF THE DATE THAT THE ALLEGEDLY DEFECTIVE PRODUCT OR PART IS FIRST DISCOVERED BY BUYER AND, IN NO EVENT, LATER THAN SIXTY (60) DAYS AFTER THE WARRANTY PERIOD HEREIN. Repair or Replacement/Credit Subject to the conditions and limitations herein, if Nelsen determines that the Product, or any part therein, does not conform to this Limited Warranty, Nelsen will repair or replace the defective Product or part therein.
- Page 20 © Nelsen Corporation Part # NRO-2540-MAN — rev 0420...
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