SnowPure Electropure XL-500 Oem Engineering Manual
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SnowPure Electropure XL-500 Oem Engineering Manual

Electrodeionization (edi)
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OEM Engineering Manual
Electropure™ XL & EXL
Series EDI
Contains information for the successful system engineering, design,
installation, operation, and maintenance of SnowPure's "Electropure™ XL
and EXL" EDI products by an OEM pure water system integrator.
Manual: Version 3.5
Updated: February 2018
 SNOWPURE, LLC, 2005-2018
VERSION 3.5 (XL+EXL) –FEBRUARY 2018
PAGE 1

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Summary of Contents for SnowPure Electropure XL-500

  • Page 1 OEM Engineering Manual Electropure™ XL & EXL Series EDI Contains information for the successful system engineering, design, installation, operation, and maintenance of SnowPure’s “Electropure™ XL and EXL” EDI products by an OEM pure water system integrator. Manual: Version 3.5 Updated: February 2018 ...
  • Page 2 Worldwide HQ (Headquarters): SnowPure Water Technologies San Clemente, CA 92672, USA Tel: +1.949.240.2188 info@snowpure.com www.snowpure.com SnowPure Global Sales Offices: China Sales Office Electropure Environmental Technology (Shanghai) Co. Ltd. 伊乐科环保科技(上海)有限公司 Tel: +86.21.6167.1860 Email: 13818807576@163.com www.snowpure.com.cn Middle East Sales Office SnowPure Middle East...
  • Page 3 PERATING ATER PECIFICATIONS ..................21 NVIRONMENTAL ONDITIONS DC P ................21 OWER UPPLY EQUIREMENTS : EDICAD™ ................22 ROJECTION ROGRAM 4: E .............. 23 HAPTER FFECTS OF ROCESS ARIABLES .......................23 PPLIED OLTAGE  SNOWPURE, LLC, 2005-2018 VERSION 3.5 (XL+EXL) –FEBRUARY 2018 PAGE 3...

  • Page 4: Table Of Contents

    ........................44 ODULE TARTUP .......................46 ATER 7: C EDI M ........46 HAPTER LEANING AND AINTAINING YOUR ODULES ..................46 ARDNESS SCALE DEPOSITS (TOC ) ............46 EXCHANGE RESINS ORGANIC FOULING  SNOWPURE, LLC, 2005-2018 VERSION 3.5 (XL+EXL) –FEBRUARY 2018 PAGE 4...
  • Page 5 ......79 PPENDIX ODULE TORAGE AND YSTEM HUTDOWN ™ EDI M #12: FDA & C PPENDIX OMPLIANCE OF ATERIALS IN LECTROPURE ODULES #13: C .......81 PPENDIX ONTINUOUS ONTROL OF PRETREATMENT  SNOWPURE, LLC, 2005-2018 VERSION 3.5 (XL+EXL) –FEBRUARY 2018 PAGE 5...
  • Page 6 The need to satisfy the increasing demand for high purity water can be achieved using SnowPure LLC’s proprietary Electropure™ electrodeionization (EDI) equipment. SnowPure, formerly Electropure and HOH Water Technology, pioneered EDI in the 1980’s. The O’Hare patent , issued in 1984, forms the basis of all EDI technology.
  • Page 7 Electropure™ EDI Technology Overview Figure 1: Schematic Diagram of the Electropure EDI Process Figure 1: Electropure EDI Technology  SNOWPURE, LLC, 2005-2018 VERSION 3.5 (XL+EXL) –FEBRUARY 2018 PAGE 7...
  • Page 8 Details of the Electropure™ EDI Process Water from all sources contains impurities including dissolved salts, which are composed of negatively charged ions (anions) and positively charged ions (cations).  SNOWPURE, LLC, 2005-2018 VERSION 3.5 (XL+EXL) –FEBRUARY 2018 PAGE 8...
  • Page 9 Both the “split” water (H and OH ) and the intended ions are transported, and therefore add to the current demand.  SNOWPURE, LLC, 2005-2018 VERSION 3.5 (XL+EXL) –FEBRUARY 2018 PAGE 9...
  • Page 10 Since the pH is forced to be near 7.0 in this section, most of the CO is forced into the bicarbonate (HCO ) form. Bicarbonate is weakly adsorbed by the anion resin, so cannot compete with “easy” ions such as Cl and SO  SNOWPURE, LLC, 2005-2018 VERSION 3.5 (XL+EXL) –FEBRUARY 2018 PAGE 10...
  • Page 11 Organics (TOC) adsorb to the surfaces of the resins and membranes. This causes fouling of the active sites. Fouled resins and membranes are inefficient at removing and transporting ions. Stack electrical resistance will increase.  SNOWPURE, LLC, 2005-2018 VERSION 3.5 (XL+EXL) –FEBRUARY 2018 PAGE 11...
  • Page 12 Units are microsiemens/cm or μS/cm or micromhos/cm, and are temperature. normalized to 25°C. DC current: current that does not change direction. Amperes in an EDI are proportional to the number of ions moved, including split water ions.  SNOWPURE, LLC, 2005-2018 VERSION 3.5 (XL+EXL) –FEBRUARY 2018 PAGE 12...
  • Page 13 At low conductivity, 1 ppm = ~ 2 microsiemens/cm. Product (Purified) Stream: the flow of water through the purifying compartments. This is where deionization occurs. This was formerly known as the Dilute Stream.  SNOWPURE, LLC, 2005-2018 VERSION 3.5 (XL+EXL) –FEBRUARY 2018 PAGE 13...
  • Page 14 US 6,503,957). Other companies hold intellectual property regarding the application of EDI technology in systems. SnowPure, LLC does not knowingly recommend to its customers the use of others’ intellectual property, and assumes no obligation on behalf of its customers as they build, install, or operate EDI in systems of their design as part of their business.
  • Page 15  Lightweight and compact.  Waterproof electrical attachment on the opposite face.  Stack and bolts hidden internally.  Membrane is a proprietary membrane made by SnowPure.  The internal design has been improved over many years.  SNOWPURE, LLC, 2005-2018 VERSION 3.5 (XL+EXL) –FEBRUARY 2018...
  • Page 16 The XL and EXL series are designed to be disposable units. It is more environmentally sound and economic to replace a module than to ship it roundtrip to the facility for a “restack.”  SNOWPURE, LLC, 2005-2018 VERSION 3.5 (XL+EXL) –FEBRUARY 2018 PAGE 16...
  • Page 17 17.9 25°C Silica, dissolved <0.1 <0.1 >0.5 >1.0 Boron >500 (source: Balazs UPW Guideline, 2004, complete guide available at www.snowpure.com) Electronic Grade Water (ASTM D-19): Type E-I Type E-II Type E-III Type E-IV Resistivity 17.5 (minimum, Megohm.cm) (95% of time),...
  • Page 18 USP is now aligned with other standards under WHO: The International Pharmacopoeia (PhInt). EDI can be used as a preferred unit operation in either USP water system. μ ˚  SNOWPURE, LLC, 2005-2018 VERSION 3.5 (XL+EXL) –FEBRUARY 2018 PAGE 18...
  • Page 19 Standard Operating and Testing Conditions Electropure EDI module performance depends on a variety of operating conditions including the OEM’s system design. For this reason, SnowPure tests its modules before shipment under standard conditions; we base our quality program on manufacturing process control and final testing.
  • Page 20 Operating Feed Water Specifications The following are requirements to operate within SnowPure’s limited warranty. Optimum performance from Electropure™ EDI modules will result if values that are more stringent are set as design goals. Specification Notes Working Optimum Range Performance Feedwater Source...
  • Page 21 The power supply should be a regulated DC power supply with enough power to cover typical and extreme operating conditions. SnowPure recommends setting the voltage (driving force) and allowing the current to float (follow the RO permeate conductivity as it changes).
  • Page 22 40 Adc Note: the power supply should be sized for the maximum requirements if possible. Projection Program: EDICAD™ Contact SnowPure for a copy of our EDICAD™ design and projection program. This ® Excel -based program allows Qualified OEM Pure Water System Integrators to enter a water analysis and system requirement to estimate the EDI system performance.

  • Page 23: Optimum Voltage

    . The water splitting rate depends on the local voltage gradients, so that higher voltages across the resin chambers leads to higher quantities of H and OH to be moved.  SNOWPURE, LLC, 2005-2018 VERSION 3.5 (XL+EXL) –FEBRUARY 2018 PAGE 23...

  • Page 24: Steady State Operation

    In EDI, the ionic charge is even more important since this is the driving force to move the ions along the resin surfaces to the membrane, and through it. Ionic Size  SNOWPURE, LLC, 2005-2018 VERSION 3.5 (XL+EXL) –FEBRUARY 2018 PAGE 24...

  • Page 25: Ionic Charge

    1. Minimize the ionic content of the feed 2. Minimize the CO and HCO in the feed Lange’s Handbook of Chemistry, 12 Edition, Table 5.2 Lange’s Handbook of Chemistry, 12 Edition, Table 5-34, 5-35  SNOWPURE, LLC, 2005-2018 VERSION 3.5 (XL+EXL) –FEBRUARY 2018 PAGE 25...

  • Page 26: Temperature

    All other things being equal, the stack resistance will change about 2% per 1C. The quality optimization will depend on other factors (below), and so the optimum setting of the voltage will change with temperature.  SNOWPURE, LLC, 2005-2018 VERSION 3.5 (XL+EXL) –FEBRUARY 2018 PAGE 26...

  • Page 27: Quality Vs Temperature

    2%/C.) In both cases the temperature correction is large and large errors may be introduced. Accurate temperature compensation becomes more important as working temperatures are different from 25C. Ultrapure Water, Jan/Feb 1996 (written by Thornton Associates, Inc.)  SNOWPURE, LLC, 2005-2018 VERSION 3.5 (XL+EXL) –FEBRUARY 2018 PAGE 27...

  • Page 28: Flow

    13-17 psi (0.9 -1.1 bar) Concentrate Pressure Drop: The concentrate flow will be different for each EDI model, and maybe for each design and each operation. SnowPure recommends the concentrate outlet be set to 10% of the EDI product flow.

  • Page 29: Drop

     Pressure drop changes dramatically as the water temperature varies from 25°C.There can be substantial pressure drop in manifold lines. Avoid undersized tubing with metering valves, flowmeters, solenoid valves, elbows, and tees.  SNOWPURE, LLC, 2005-2018 VERSION 3.5 (XL+EXL) –FEBRUARY 2018 PAGE 29...

  • Page 30: Effect Of Outletp

    The second result is that the module current increases as feed conductivity increases. Moving more ions takes more electrons. The current increase is not linear because the current also moves water, which has been split.  Increased feed conductivity increases current.  SNOWPURE, LLC, 2005-2018 VERSION 3.5 (XL+EXL) –FEBRUARY 2018 PAGE 30...

  • Page 31: Voltage Driving Force

    (H ) and hydroxyls ) in this region. This results in better polishing, better removal of carbon dioxide, better silica removal, and higher product resistivity.  SNOWPURE, LLC, 2005-2018 VERSION 3.5 (XL+EXL) –FEBRUARY 2018 PAGE 31...

  • Page 32: Ionic Balances And Ph

     Lowering the concentrate flow (higher recovery)—this lowers the resistance of the stack. This can also be achieved with concentrate recirculation or salt injection. Note: the risk is hardness scaling in the concentrate.  SNOWPURE, LLC, 2005-2018 VERSION 3.5 (XL+EXL) –FEBRUARY 2018 PAGE 32...

  • Page 33: The System Design Is The Responsibility Of The Electropure Edi P

    A brine injection system may seem advantageous, but requires the maintenance of a chemical source, and lessens the “no-chemical-addition” benefit of EDI.  SNOWPURE, LLC, 2005-2018 VERSION 3.5 (XL+EXL) –FEBRUARY 2018 PAGE 33...

  • Page 34: Edi System Protection And Component Description Of An

    RO membrane, and this is fed to the EDI. To minimize EDI cleaning frequency, the EDI feed hardness should be minimized. Sediment Filter: Removes undissolved matter from feed water to prevent the reverse osmosis membranes from fouling.  SNOWPURE, LLC, 2005-2018 VERSION 3.5 (XL+EXL) –FEBRUARY 2018 PAGE 34...
  • Page 35 Liqui-Cel. Best placed after the RO, but may be before. These can be purchased as an option from SnowPure. Reverse Osmosis System: Removes the bulk of dissolved salts and organics. When properly maintained, an RO system can reject up to 98-99% of the ions and TOC.

  • Page 36: P&Id Designation For An

    EDI module(s), power should be shut off if flow to any of the EDI module streams is below a set point. Pressure Relief Valve: Protects against excessive pretreatment pressure fluctuation. Act as a polisher by means of SnowPure’s electrodeionization EDI Module(s): technology.
  • Page 37 Figure 3: Best Practices P&ID of a Simple EDI System Note: SnowPure will provide 4 levels of BP P&ID’s in .dwg form to its Qualified OEM customers.  SNOWPURE, LLC, 2005-2018 VERSION 3.5 (XL+EXL) –FEBRUARY 2018 PAGE 37...

  • Page 38: Designs With Multiple

    Sampling valves (testcocks) on the outlets of each module (concentrate and product) are helpful in diagnosing the performance of individual modules on a skid. SnowPure provides Best Practices (BP) P&ID’s for multiple module systems to its Qualified OEM Customers in .dwg format.

  • Page 39: Installation Notes

    If NaCl brine is used, it must be of the highest quality and must have few impurities. Iron and silt are present in cheap “rock salt”, which must be avoided. Often “silica” is added to “salt” to allow the crystals to “flow”. These can be harmful to the EDI module over time.  SNOWPURE, LLC, 2005-2018 VERSION 3.5 (XL+EXL) –FEBRUARY 2018 PAGE 39...
  • Page 40 22 (49) XL-100-* 23 (50) XL-200-* 25 (54) XL-300-* 31 (68) XL-400-* 35 (76) XL-500-* 42 (92) EXL-510/550 69 (151) EXL-610/650 86 (190) EXL-710/750 98 (216) EXL-850 108 (238)  SNOWPURE, LLC, 2005-2018 VERSION 3.5 (XL+EXL) –FEBRUARY 2018 PAGE 40...

  • Page 41: Mounting Options

    Module Orientation SnowPure’s EDI modules are designed to be installed in an upright, or vertical, position. Gases can become trapped in the chambers and interfere with ion removal if mounted in a horizontal position.
  • Page 42 The DC power supply may contain high- or low-frequency AC component (ripple) which should be measured. Supply  SNOWPURE, LLC, 2005-2018 VERSION 3.5 (XL+EXL) –FEBRUARY 2018 PAGE 42...

  • Page 43: Power Connection & W

    ► Torque the bolts only when the module is depressurized. If there is internal pressure during torqueing, the level of torque will incorrect.  SNOWPURE, LLC, 2005-2018 VERSION 3.5 (XL+EXL) –FEBRUARY 2018 PAGE 43...

  • Page 44: Module Startup

    3. Have data sheets and a startup notebook on hand. Record initial data and any observations. Call Technical Service at SnowPure with any questions. 4. Bleed all air out of plumbing system by first filling the manifold(s) and modules slowly with water, then pulsing water to all three streams to knock bubbles loose.
  • Page 45 13. Check torque in the un-pressurized state (with no pressure) and re-adjust. Follow up with the recommended periodic torque procedure. 14. Leave a maintenance manual at the site with the customer.  SNOWPURE, LLC, 2005-2018 VERSION 3.5 (XL+EXL) –FEBRUARY 2018 PAGE 45...

  • Page 46: Feed Water

    Caution: care should be taken not to exceed the output limitations of the power supply if over-current protection is not provided.  SNOWPURE, LLC, 2005-2018 VERSION 3.5 (XL+EXL) –FEBRUARY 2018 PAGE 46...

  • Page 47: Electrode Connectors

     Turn the electrical power OFF for safety.  Use only a damp cloth, perhaps with a light, mild detergent.  Do not rub as to remove the safety stickers.  SNOWPURE, LLC, 2005-2018 VERSION 3.5 (XL+EXL) –FEBRUARY 2018 PAGE 47...

  • Page 48: Chapter 8: Problems

    Conductivity too high in feedwater Check TDS of RO product. Excessive Current No flow of water through module. Ensure flow of water through module, otherwise it will be destroyed!  SNOWPURE, LLC, 2005-2018 VERSION 3.5 (XL+EXL) –FEBRUARY 2018 PAGE 48...

  • Page 49: Chapter 9: Auxiliarye

    Option: XL Metric tubing conversion kit. Converts ¼” and 3/8” standard tubing to metric tubing for all XL tubing connections. Option: +GF+ union halves that match the EXL feed and product adapters. Speak with Customer Service at SnowPure for pricing and availability.  SNOWPURE, LLC, 2005-2018 VERSION 3.5 (XL+EXL) –FEBRUARY 2018...

  • Page 50: Chapter 10: Electropure

    Chapter 10: Electropure Module Dimensions Figure 4: XL™ EDI Module Drawing & Dimensions  SNOWPURE, LLC, 2005-2018 VERSION 3.5 (XL+EXL) –FEBRUARY 2018 PAGE 50...
  • Page 51 Figure 5: EXL™ EDI Module Drawing & Dimensions  SNOWPURE, LLC, 2005-2018 VERSION 3.5 (XL+EXL) –FEBRUARY 2018 PAGE 51...
  • Page 52 Figure 6: XL Mounting Options Figure 7: EXL Mounting Options  SNOWPURE, LLC, 2005-2018 VERSION 3.5 (XL+EXL) –FEBRUARY 2018 PAGE 52...
  • Page 53  SNOWPURE, LLC, 2005-2018 VERSION 3.5 (XL+EXL) –FEBRUARY 2018 PAGE 53...

  • Page 54: Ptions

    Figure 8: Manifolding Options  SNOWPURE, LLC, 2005-2018 VERSION 3.5 (XL+EXL) –FEBRUARY 2018 PAGE 54...
  • Page 55 Freight and field labor costs shall be at the customer’s expense. The exclusive remedy provided herein shall not be deemed to have failed of its essential purpose so long as SnowPure is willing and able to repair or replace any non-conforming module or component part thereof.
  • Page 56 Customer agrees to pay all of SnowPure’s collection costs (including reasonable attorneys’ fees). SnowPure retains title to, ownership of, and to the extent permitted by law, the right to repossess its goods, until payment in full is made for such goods.

  • Page 57: Chapter 13: Safety

    Note that the customer is responsible for the safe design and installation of the system, and for the training of the operators. SnowPure does not claim that the information below alone will ensure electrical safety.
  • Page 58 25% of the LEL, or less than 1%(v/v). This is the responsibility of the OEM and the installation team.  SNOWPURE, LLC, 2005-2018 VERSION 3.5 (XL+EXL) –FEBRUARY 2018 PAGE 58...

  • Page 59: Chapter 14: Labeling And Equipment Label

    This symbol indicates care should be taken otherwise damage or injury could occur Caution: High-Voltage Potential Shock/Electrocution Hazard Caution: DO NOT DISASSEMBLE Service, maintenance and diagnostics by trained technician only  SNOWPURE, LLC, 2005-2018 VERSION 3.5 (XL+EXL) –FEBRUARY 2018 PAGE 59...

  • Page 60: Ec Declaration Of

    EC Declaration of Conformity:  SNOWPURE, LLC, 2005-2018 VERSION 3.5 (XL+EXL) –FEBRUARY 2018 PAGE 60...

  • Page 61: Chapter 15: Appendices

    37% Reagent Grade hydrochloric acid (HCl) Safety tip: mixing of acids: remember to add acid to water—never add water to acids. www.avistatech.com, MSDS and technical sheets available on Avista and SnowPure websites. must be low in iron (Fe)  SNOWPURE, LLC, 2005-2018 VERSION 3.5 (XL+EXL) –FEBRUARY 2018...
  • Page 62 6 hours, and ultimate product quality will be reached after about 16 hours of operation.  SNOWPURE, LLC, 2005-2018 VERSION 3.5 (XL+EXL) –FEBRUARY 2018 PAGE 62...

  • Page 63: In The Feed Stream

    L211 solution (100 ml for mild fouling), available from Avista Technologies. Technical specification sheet and MSDS are available at www.snowpure.com/knowledgebase. The pH will be 10.5-11.0.  The solution should be heated to 35-40°C for aggressive cleaning. Caustic Cleaning Solution Formula 2: ...
  • Page 64 Run the system for up to 4 hours to rinse out all of the cleaner. Check the outlet for TOC if this is a critical parameter. TOC may take 16 hours to reach ppb levels.  SNOWPURE, LLC, 2005-2018 VERSION 3.5 (XL+EXL) –FEBRUARY 2018 PAGE 64...

  • Page 65: Leaning Procedure / Sleaning Procedure /Toc Bolt Torques -Xl & Xl-Hts S - Xl & Xl-Hts Only

    20 ft-lbs (27 N-m) XL-HTS (all) 10 ft-lbs (13 N-m) EXL (all) No Torque Required EXL-HTS (all) No Torque Required Figure 8: Torque Sequence – XL & XL-HTS Only  SNOWPURE, LLC, 2005-2018 VERSION 3.5 (XL+EXL) –FEBRUARY 2018 PAGE 65...

  • Page 66: Procedure

    Their conclusion was that the critical product side of the EDI module did indeed act as a biostat. The best sanitization method, according to SnowPure, is to keep the unit operational. In this mode, bacterial colonies should not grow, especially on the product side.
  • Page 67  Avoid oxidizing agents, which damage the module.  Avoid hot water sanitization (65-80°C), which damages the base-form (OH anionic resin and membrane, unless the module is an HTS design.  SNOWPURE, LLC, 2005-2018 VERSION 3.5 (XL+EXL) –FEBRUARY 2018 PAGE 67...
  • Page 68 4. DO: Allow 3-8 hours of normal operation (including applied voltage) for the module to return to high quality equilibrium performance. 5. DO: Call or email SnowPure with any questions or observations or concerns. Phone: +1.949.240.2188. Email: info@snowpure.com 6.
  • Page 69 It is only OK to operate the voltage with normal water flow and normal temperatures. 9. DO NOT: XL-HTS only: Do not adjust the torque at temperatures over 45°C.  SNOWPURE, LLC, 2005-2018 VERSION 3.5 (XL+EXL) –FEBRUARY 2018 PAGE 69...

  • Page 70: Odule Chemical Sanitization Odule Heat Sanitization Egeneration Procedure

    5. Run the unit at these settings; module should be fully regenerated and the quality of the product should be normal. Note: the above is an approximate guide. You may need to vary the parameters to achieve regeneration.  SNOWPURE, LLC, 2005-2018 VERSION 3.5 (XL+EXL) –FEBRUARY 2018 PAGE 70...

  • Page 71: Xl" Edi Module

    Appendix #7: Data Form for Electropure™ "XL" EDI Module  SNOWPURE, LLC, 2005-2018 VERSION 3.5 (XL+EXL) –FEBRUARY 2018 PAGE 71...

  • Page 72: Lectrical Cost

    5. Cost of energy used to produce a unit volume of pure water: Cost Volume Energy Rate $ 0.15 1000 gallons 1.2 kW-hr $ 0.12 /kW-hr € 0.05 € 0.14 /kW-hr 0.3 kW-hr  SNOWPURE, LLC, 2005-2018 VERSION 3.5 (XL+EXL) –FEBRUARY 2018 PAGE 72...

  • Page 73: Lectrodeionization

    ® a. CO removal pre-RO using Calcite+Corosex media b. CO removal by RO using pH >= 8.3 c. CO removal interstage RO d. CO removal post RO using Liqui-Cel™  SNOWPURE, LLC, 2005-2018 VERSION 3.5 (XL+EXL) –FEBRUARY 2018 PAGE 73...
  • Page 74 EDI voltage too low may lead to low silica removal c. EDI voltage needs to be splitting water effectively in the polishing section. see US Patent 5,925,255 for HERO process. E.g. Hydranautics CPA5, or Koch Fluid Systems TFC-XR.  SNOWPURE, LLC, 2005-2018 VERSION 3.5 (XL+EXL) –FEBRUARY 2018 PAGE 74...

  • Page 75: Edi

    1. In areas with high silica in the raw water, use the best quality RO membranes, and use RO membranes that are designed to reject silica. SnowPure recommends Nitto Denko CPA5-LD, available from Hydranautics. 2. Operate your Electropure™ EDI at 10% higher than standard voltage.
  • Page 76 L211 solution (100 ml for mild fouling), available from Avista Technologies. The pH will be 10.5-11.0. Technical specification sheet and MSDS available at www.snowpure.com/knowledgebase.  The solution should be heated to 45-50°C for aggressive cleaning. Caustic Cleaning Solution Formula 2: ...
  • Page 77 Run the system for up to 4 hours to rinse out all of the cleaner. Check the outlet for TOC if this is a critical parameter. TOC may take 16 hours to reach ppb levels.  SNOWPURE, LLC, 2005-2018 VERSION 3.5 (XL+EXL) –FEBRUARY 2018 PAGE 77...

  • Page 78: Edi M

    Appendix #10: Procedure to Prevent Freezing of EDI Modules This is SnowPure’s recommendation for the prevention of freezing of Electropure™ EDI modules. Freezing may take place either during shipment (by air or by land), or in storage. Electropure™ EDI modules are shipped sealed, bacteria-free, and drained of free water but still wet.
  • Page 79 Appendix #11: EDI Module Storage and EDI System Shutdown SnowPure’s recommendations for module storage and for EDI system shutdown and startup are based on our experience and our customers’ experience. The primary criterion for how to store modules and shutting down systems is the prevention of bacterial growth.
  • Page 80 (CFR 21) as safe to use in contact with food. None of the materials used in Electropure™ modules are of animal origin. SnowPure, LLC maintains files from its suppliers as to their CFR 21 compliance. SnowPure, LLC does no independent testing of component materials and solely relies on its suppliers to be in compliance with FDA requirements.

  • Page 81: Cco2 Ro

    Corosex with the slower reacting properties of Calcite, effectively reducing potentially basic (high pH) properties due to overcorrection. SnowPure recommends a mixture of between 10% and 20% Clack Corosex® II with Clack Calcite media, depending on the pH and CO content of the feedwater.

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