IP-MAN-VNX50HH2 June 2009 Manual...
Transcript of IP-MAN-VNX50HH2 June 2009 Manual...
IONPURE®
VNX50HH-2 CEDI Modules
Operation &
Maintenance Manual
IP-MAN-VNX50HH2 June 2009
Manual Covers Part#:
• IP-VNX50HH-2
10 Technology DriveLowell, Massachusetts 01851 Tel: (866) 876-3340 Fax: 978-934-9499
IONPURE ® VNX50HH-2 CEDI Modules
Page 2 IP-MAN-VNX50HH2
TABLE OF CONTENTS DISCLAIMER STATEMENT 4
PROPRIETARY RIGHTS STATEMENT 4
OPERATING MANUAL REVISION HISTORY 5
1. INTRODUCTION 5
1.1. VNX50HH-2 model module Overview 5
1.2. Using this manual 6
1.3. Installation Precautions 6
1.4. Operating Precautions 6
1.5. Shutdown Precautions 7
2. PRE-INSTALLATION: PREPARATION & REQUIREMENTS 7
2.1. Tools and Equipment 7
2.2. Electrical and Plumbing Connections 8
2.3. Inspect the Module 10
2.4. Operating Requirements 10
2.5. Flow Rates and pressure drops 11
3. VNX MODULE INSTALLATION AND OPERATION 12
3.1. Moving the VNX Module into Place 12
3.2. Water Connection Configuration and Fittings 12
3.3. Electrical Connections 15
4. DETERMINE OPERATING DC CURRENT PRIOR TO STARTUP 16
5. START-UP PROCEDURE 16
5.1. Test interlocks 16
5.2. Notes on Recovery, Silica and Hardness 16
5.3. Startup of VNX-HH modules 17
IONPURE ® VNX50HH-2 CEDI Modules
Page 3 IP-MAN-VNX50HH2
6. MAINTENANCE AND TROUBLESHOOTING 18
6.1. General Maintenance Guidelines 18
6.2. Specific Maintenance Guidelines 18
6.3. Cleaning Circumstances 19
6.4. Sanitization Circumstances 19
6.5. Required Cleaning and Sanitizing Equipment 19
6.6. System Preparation for Cleaning or Sanitization 20
6.7. Cleaning and Chemical Sanitization Procedures 21
6.8. Cleaning with 2.0% Hydrochloric Acid (HCl) 22
6.9. Cleaning with 5% Brine + 1% Caustic Solution 24
6.10. Cleaning or Sanitizing with Sodium Percarbonate 25
6.11. Sanitizing with Peracetic Acid 27
7. TROUBLESHOOTING 31
8. SHUTDOWN AND STORAGE 38
8.1. SYSTEM SHUTDOWN 38
8.2. STARTUP AFTER SHUTDOWN 38
APPENDIX A: VNX50HH-2 MODULE SPECIFICATIONS 39
APPENDIX B: VNX50HH LAYOUT & ELEVATION DRAWING B-1 40
APPENDIX B: VNX50-HH - PID DRAWING B-2 41
APPENDIX B: VNX50-HH - ELECTRICAL CONNECTIONS DRAWING B-3 42
APPENDIX C: PORT ADAPTER AND PLUG DRAWINGS 43
IONPURE ® VNX50HH-2 CEDI Modules
Page 4 IP-MAN-VNX50HH2
DISCLAIMER STATEMENT
The operation and maintenance manual should provide complete and accurate information to meet your operating and/or service requirements based on the information available at the time of publication. The information in this manual may not cover all operating details or variations or provide for all conditions in connection with installation, operation and maintenance. Should questions arise which are not answered specifically in this manual, contact your water system supplier. IONPURE reserves the right to make engineering refinements that may not be reflected in these manuals. The material in these manuals is for informational purposes and is subject to change without notice. PROPRIETARY RIGHTS STATEMENT
This manual discloses information in which IONPURE has proprietary rights. Neither receipt nor possession of this manual confers or transfers any right to the client, and by its retention hereof, the client acknowledges that it will not reproduce or cause to be reproduced, in whole or in part, any such information except by written permission from IONPURE. The client shall have the right to use and disclose to its employees the information contained herein for the purpose of operating and maintaining the IONPURE equipment, and for no other purpose. In the event the content of this manual is altered or section/items are omitted during a reproduction, in whole or in part, and instructions or definitions within the reproduction result in personal injury to those who follow the altered instructions, the burden of responsibility for personal injury falls solely on the party who effects the reproduction. MANUAL USER'S GUIDE This manual describes the procedures necessary to install, operate, and maintain your IONPURE Continuous Electrodeionization modules. Please read this manual carefully before installing and operating your modules. The module warranty may be voided if installation or operation instructions are not followed correctly. Notes, Warnings, Cautions are used to attract attention to essential or critical information in a manual. Warnings and Cautions will appear before the text associated with them, and notes can appear either before or after associated text. NOTE: Notes are used to add information, state exceptions, and point out areas that may be of
greater interest or importance.
Cautions indicate a situation that may cause damage or destruction of equipment or may pose a long term health hazard. Warnings indicate condition, practices, or procedures which must be observed to avoid personal injury or fatalities.
IONPURE continually strives to provide safe, efficient, trouble-free equipment using the optimum technology for your application. If problems should develop, IONPURE's worldwide network of technical support will be available to provide assistance. For service, sales, parts, or additional manual copies, please visit the website: www.ionpure.com.
IONPURE ® VNX50HH-2 CEDI Modules
Page 5 IP-MAN-VNX50HH2
OPERATING MANUAL REVISION HISTORY
EVENT DATE DESCRIPTION Original publication August 2009 Operation & Maintenance Manual 1. INTRODUCTION
This section contains the following instructions:
• VNX50HH-2 model module overview - Brief introduction to components and models • Using this Manual - How to use this Manual • Precautions - Precautions to prevent personal injury or equipment damage during installation
1.1. VNX50HH-2 model module Overview VNX50HH-2 modules are designed to be installed in either single or multiple Continuous Deionization VNX systems. Their compact state-of-the-art design assures ease of installation, maintenance, and service. Compared to the VNX50-2 the VNX5HH-2 module was designed for higher feed water hardness tolerance. They are differentiated by a green ‘HH” marking on the vessel of the VNX50HH-2 module. VNX50HH-2 modules are available in the following size:
Part Number Nominal Flow Description
IP-VNX50HH-2 40 gpm (9.1 m3/h) Single VNX module, VNX type For more information on the VNX module specifications and flow rates, see Sections 2.2, 5.2 and/or Appendix A of this Manual. Figure 1-1: Angle and Side views of VNX50HH-2 Modules
IONPURE ® VNX50HH-2 CEDI Modules
Page 6 IP-MAN-VNX50HH2
1.2. Using this manual
Service technicians should review this manual prior to going to the site. It lists tools and materials needed to install the modules. It also outlines the site information required to prepare for installation.
NOTE: The warranty may be void if installation or operation instructions contained in this manual are not followed exactly.
This Manual describes the installation, operation, and routine maintenance of the VNX50HH-2 modules. It also contains information on basic troubleshooting (Section 7).
IONPURE strongly recommends all users read the entire contents of the manual. If the VNX50HH-2 module is not operating properly after going through the basic troubleshooting exercises, contact your Local Service Provider.
1.3. Installation Precautions
• DO NOT OPEN THE VNX MODULE. OPENING THE MODULE WILL VOID THE WARRANTY AND CAUSE IRREVERSIBLE DAMAGE
• During operation, the electrode wiring inside the module junction boxes are at high voltage and present a shock hazard. THEREFORE, BEFORE TOUCHING THE INSIDE OF THE JUNCTION BOX, CONFIRM THAT AC POWER HAS FIRST BEEN DISCONNECTED AND LOCKED OUT ACCORDING TO STANDARD LOCKOUT/TAGOUT PROCEDURES.
• To eliminate the possibility of electric shock, confirm that all GROUND WIRES ARE PROPERLY CONNECTED. Thoroughly read all the information in this manual before operating the VNX model modules.
• THE MODULE MUST BE OPERATED ACCORDING TO THE DESIGN SPECIFICATIONS FOR TEMPERATURE AND HUMIDITY.
• IMPORTANT - Pipe sections prepared for installation must be inspected, and be free of debris from storage or cutting tool particles. This must be done before installation.
• IMPORTANT - Because VNX modules have narrow flow distribution channels, plugging by particles can cause permanent damage. Always install pressure gauges, sampling ports, sensors, etc. in tee fittings. Do not drill or tap into piping. After installing gauges, sampling ports, sensors, etc., always flush out the piping before connecting to the VNX module to remove any debris.
• Installation of the VNX module must be completed in accordance with the procedures outlined in this manual. If deviations from the prescribed procedures are deemed necessary to achieve the desired performance, consult your local Service Provider.
1.4. Operating Precautions • DO NOT APPLY POWER TO THE VNX MODULE UNTIL PROPER FLOW AND PRESSURE HAVE
FIRST BEEN CHECKED AND VERIFIED.
• Allow for proper inlet and outlet connections. NEVER BLOCK OFF (DEAD-HEAD) ALL OF THE VNX OUTLET pipe connections. Dead-heading by blocking all outlets can result in over-pressurization, leading to permanent damage.
IONPURE ® VNX50HH-2 CEDI Modules
Page 7 IP-MAN-VNX50HH2
• Do not operate the module under conditions other than those stated in the module manual. The prescribed feed water and electrical requirements, and flow configurations, must be followed at all times. If the feed water quality or the product water requirements change, contact the IONPURE Technical Support department for assistance.
Once every six months:
• Make sure all wiring connections are tight
• Test safety interlocks such as flow switches or connections to upstream equipment
1.5. Shutdown Precautions • Confirm that the pressure in the unit is relieved until all pressures inside the unit are atmospheric.
(i.e., all pressure gauges should read zero).
• Drain standing water and plug all inlets and outlets.
2. PRE-INSTALLATION: PREPARATION & REQUIREMENTS
This section contains the following pre-installation information: • Tools and equipment - Tools and equipment needed to install the module • Module Inspection - Inspecting the VNX module for damage • Operating conditions - Temperature range, space requirements, electrical connections, feed water
specifications, plumbing and drain requirements
2.1. Tools and Equipment The following items are required to unpack, position, and install the VNX module:
• Spreader bar mechanism to move the module into place • Slip joint pliers • Wire cutters/strippers • Phillips head screwdriver
Spreader bar
Strapping rated for at least
1000 lbs (454 kg)
IONPURE ® VNX50HH-2 CEDI Modules
Page 8 IP-MAN-VNX50HH2
2.2. Electrical and Plumbing Connections Electrical An electrical junction box is included and mounted on the VNX 50HH-2 modules. A single conduit connection is required through a 7/8” thru hole to provide power to the CEDI module. The junction box follows DC wire color conventions.
• Red + • Black –
Figure 2-1: Junction Box End of Module
Inlet and Outlet plumbing connections Ionpure VNX50HH-2 modules have molded PPO end blocks with FEMALE connections. There are four (4) necessary custom ACME thread connection points (for more information see Connection Drawings in Appendix B:
• Product Inlet (Dilute Feed) • Product Outlet (Product) • Reject Inlet (Concentrate Feed) • Reject Outlet (Reject)
Labels (as shown on the right) are used for port identification.
IONPURE ® VNX50HH-2 CEDI Modules
Page 9 IP-MAN-VNX50HH2
Table 2-1: Typical inlet/outlet configurations.
Module Port Locations and Connection Types Module Model Connection type Recommended Configuration Inlet/outlet Configuration
VNX50HH-2
PVC included and installed with module
Polypropylene available as a separate purchased kit
Same side inlet and outlet OR Side inlet opposite side outlet
Product ConnectionReject Connection
NOTE – VNX50HH-2 Modules must be connected with CEDI product water to the Reject inlet (Concentrate inlet)
Available Connection Types PVC – 1-1/2” Female Socket PP - 50mm Butt Weld PVDF – 50mm Butt Weld
Grounding of the module piping
DILUTE IN
DILUTE OUT
FI
PI
C PI
RO Permeate
CEDI Reject
PIFICEDI Product
CONC IN
CONC OUT
PI
Figure 2-2: Depicts the flow diagram for the VNX-HH. Note – Product water (Dilute out) feeds the Concentrate Inlet.
To avoid the risk of electrical shock, some form of grounding must be used on any stream where the plumbing is stainless steel or if there are samples points or instrumentation in close proximity to the module. For sanitary
applications, a grounding cap can be used, Ionpure part number 49/S4501-124, which is actually a ¾” TC cap with a welded stud to be wired to ground. For non-sanitary applications, a ¼” SS threaded grounding rod can be used, Ionpure part number ZIVC00160.
IONPURE ® VNX50HH-2 CEDI Modules
Page 10 IP-MAN-VNX50HH2
Figure 2-3: Grounding Rod
2.3. Inspect the Module • Do not uncrate the module prior to moving it into its final location. After uncrating it, inspect it
for any signs of damage. If damage is apparent, immediately notify your Local Service Provider and the carrier.
2.4. Operating Requirements
In order to operate to specification, the VNX module must have the following conditions present. If any of these conditions are unmet, do not attempt to install the VNX module without specific instructions from your Local Service Provider’s Technical Support.
• Operating Environment
The VNX module requires indoor installation out of direct sunlight. The maximum ambient room temperature should not exceed 113 °F (45° C). The module can tolerate humidity of up to 90%, as long as condensation does not occur.
• Space Requirements
The physical dimensions of the VNX Module are given in appendix A. In addition to the size of the module itself, the arrangement of the piping and electrical connections determine the amount of space the module needs to operate. This arrangement varies from site to site, depending on the conditions at a particular location.
• Electrical Requirements
The VNX module requires the following power sources. In all cases the cathodes must be at ground potential.
Table 2-2: Electrical requirements for the VNX Modules
Model Nominal Flow Rate DC Power
VNX50HH-2 40 gpm (9.1 m3/hr) 0-600 VDC, 8 Amps
IONPURE ® VNX50HH-2 CEDI Modules
Page 11 IP-MAN-VNX50HH2
• Feed Water Requirements – RO Permeate
Feed water for the VNX module must always meet the specifications outlined in Table 2-3. In most cases, pre-treating VNX module feed water with reverse osmosis (RO) will bring it within these specifications. Depending on the conditions, however, some sites may require additional pretreatment. To determine if additional pretreatment is required, compare the VNX feed water (RO Permeate) on site with the feed water requirements listed below.
Table 2-3: Feed Water Requirements for the VNX50HH Modules
Module Model VNX50HH-2 Feed water source RO permeate
Feed water conductivity equivalent including CO2
*< 40 µS/cm
Silica (SiO2) < 1 ppm Iron, Manganese, Sulfide < 0.01 ppm
Total chlorine < 0.02 ppm as Cl2Total Hardness ≤ 2.0 ppm as CaCO3
Dissolved organics (TOC) < 0.5 ppm Operating pH range 4 – 11
Operating Temperature 40 - 113 °F (5 – 45 °C) Inlet pressure <100 psi ( 7 bar)
Note: Recycling the VNX reject to the RO feed will cause the CO2 load on the VNX to increase, and may have an impact on the VNX product water quality. Please refer to Ionpure.com for additional reject stream system design guidance including the following paper from Jonathan Wood and Joe Gifford (“Process and System Design for Reliable Operation of RO/CEDI Systems”)
• Drain Requirements
Place the VNX module near a drain that can accommodate at least 100% of the total feed flow.
2.5. Flow Rates and pressure drops • See Appendix A
IONPURE ® VNX50HH-2 CEDI Modules
Page 12 IP-MAN-VNX50HH2
3. VNX MODULE INSTALLATION AND OPERATION
This section contains the following installation information: • Moving and unpacking - Moving the Module into place and unpacking it • Connecting the Module - Connecting the plumbing and electrical.
3.1. Moving the VNX Module into Place Confirm that the pre-installation requirements outlined in Section 2 are met and the system is ready for VNX Module installation.
• Remove any packaging materials and move the module to its operating location. (See Section 2). Use safe lifting practices when moving the module.
• Remove the yellow dust plugs that seal the inlet and outlet ports on the
module. Failure to remove yellow dust plugs can cause permanent damage to the modules.
3.2. Water Connection Configuration and Fittings
Pre-Flushing - Make sure all upstream pretreatment equipment and piping have been thoroughly flushed with particle-free water before connecting them to the VNX Module. Flushing removes any particles left in the piping
from cutting and assembly. If particles remain, they could plug the passages inside the VNX Module.
NOTE - Failure to properly flush the pretreatment water system of installation debris to drain prior to flowing water to the CEDI can result in particulate fouling that may be irreversible.
Plug Removal - Remove yellow dust plugs from the connection ports.
Connections - Ionpure VNX modules have a Molded PPO endplate with FEMALE ACME thread connections. Connection adapters and plugs are factory installed into the female ACME thread ports. There are four (4) necessary connection points:
• Product Inlet (Dilute Feed) • Product Outlet (Product) • Reject Inlet (Concentrate Feed) • Reject Outlet (Reject)
See Table 2-1 in Section 2.2 for module specific port locations or refer to the module layout drawings in appendix B. Connection adapter drawings can be located in appendix C.
IONPURE ® VNX50HH-2 CEDI Modules
Page 13 IP-MAN-VNX50HH2
Modules are shipped with the connection ports installed. Product and Reject ports are labeled with color coded identification (see figure above). Blue Product port inlets (I) and outlets (O) are identified with Blue labels affixed near the appropriate end block connection points. Red Reject port inlets (I) and outlets (O) are identified with Red labels affixed near the appropriate end block connection points. See appendix C for PVC and PP adapter drawings. If alternate approved connection orientations are required, insure that connections to this type of module INCLUDE THE USE OF O-RINGS. For additional module specific connection information see appendix B.
• The unit comes with 4 factory installed PVC connection adapters.
• The unit comes with 4 factory installed PVC plugs.
There are several important points regarding the piping connections:
Sealing Mechanism - The seal is created by a dual o-ring between the smooth hole wall of the end block and the connection adapter. This is similar to an RO end adapter that seals into an RO pressure vessel end cap. The female threads in the endplate are ACME threads. They are NOT TAPERED pipe threads and DO NOT CREATE the seal, they allow the sealing surfaces to move towards each other and hold the piping adapter in place.
Use of Sealants - DO NOT use Teflon® tape or any other pipe sealant (e.g. Dope) on the ACME thread adapters. The use of these products on the ACME thread adapter will prevent good sealing.
IONPURE ® VNX50HH-2 CEDI Modules
Page 14 IP-MAN-VNX50HH2
O-rings – O-rings are included with the plugs and pipe adapters. Connection adapters use white O-rings size (2-222) and an orange O-ring size (2-221) and are made of Silicon. The slightly larger o-ring (white) is 222.
2-221 Oring
2-222 Oring
2-221 Oring
2-222 Oring
Plug PVC Connection Adapter PVC
Piping Adapter Material - To avoid corrosion, the piping adapters and plugs must be non-metallic. Factory supplied plugs and adapters are made of PVC. Additional high purity adapter kits are available if required for installation. See Appendix C for the Polypropylene plug/adapter drawings.
Tightening - Adapters should be tightened to ensure that orings are engaged in the endplate. The maximum torque necessary to install adapters and plugs will be less than 6 ft-lbs to engage the oring and ensure a leak free seal.
IONPURE ® VNX50HH-2 CEDI Modules
Page 15
3.3. Electrical Connections
Electrical Connections
• VNX modules have on-board electrical junction boxes and follow common DC voltage color conventions. Only one electrical connection is required per module. Power connections to the module junction box should be made with 12AWG (3.31mm2) wire and conduit connections should be supplied through the 7/8” junction box thru hole. DC wire color conventions.
o Red + o Black –
Electrical Precautions
• Ensure that polarity of DC connections is correct before applying DC power. Operation with polarity reversed will permanred and black wires are correctly oriented on
• Do not run AC and DC wiring within the and lead to malfunctions.
• Disconnect poweaccepted Lockousystem.
• All wiring done in the field must conform to loProvider if there is a conflict between the inst
• Power connections from the modules shocapable of meeting the DC power requiremen
IP-MAN-VNX50HH2
ently damage the cathode. It is critical that the the positive (+) and negative (-) terminal blocks.
same conduit. This may cause interference
r before opening any enclosure and follow t/Tag out procedures when working on the
cal electrical codes. Consult your Local service ructions in this manual and the local codes. uld be connected to a suitable power supply ts of the module.
IONPURE ® VNX50HH-2 CEDI Modules
Page 16 IP-MAN-VNX50HH2
4. DETERMINE OPERATING DC CURRENT PRIOR TO STARTUP
The VNX50HH-2 modules are designed and tested to operate correctly at 8 amps. If the feed water meets the influent quality requirements for the VNX50HH-2, the current will be set independent of the Feed Water Conductivity (FCE). Set the power supply to operate in constant amperage mode and set the amperage at 8 Amps DC. Note – This procedure is different from our typical startup amperage calculation that would be calculated based on the Feed Water Conductivity Equivalent (FCE).
5. START-UP PROCEDURE
5.1. Test interlocks
• Test flow switches and other interlocks, including the RO interlock if applicable • Test pressure relief if applicable
• Set alarm points
5.2. Notes on Recovery, Silica and Hardness
VNX50HH-2
• VNX recovery of 90% is limited to systems with feed water total hardness of less than 1 ppm
as CaCO3. For systems operating with CEDI feed water hardness from 1 – 2 ppm as CaCO3 the maximum water recovery is limited to 80%. In addition there is a minimum reject flow of 2.6 gpm per VNX modules.
• For normal recovery of 80-90%, feed water silica must be ≤ 1 ppm as SiO2
Table 5-1: Flow Range
Hardness (as CaCO3)
Recovery Flow Range Dilute Feed
Gpm [m3/hr]
Concentrate feed from
Dilute (CEDI Product)
Gpm [m3/hr]
Net Product
Gpm [m3/hr] Minimum 25 [5.68] 5 [1.14] 20 [4.54] Nominal 50 [11.36] 10 [2.27] 40 [9.08] 1-2 ppm 80% Maximum 62.5 [14.2] 12.5 [2.84] 50 [11.36]
Minimum 25 [5.68] 2.6 [0.59] 22.4 [5.09] Nominal 50 [11.36] 5 [1.14] 45 [10.22] <1 ppm 90% Maximum 62.5 [14.2] 6.2 [1.41] 56.3 [12.79]
IONPURE ® VNX50HH-2 CEDI Modules
Page 17 IP-MAN-VNX50HH2
100Rate Flow Feed
Rate FlowProduct Recovery % ×= 100Recovery %
Rate FlowProduct Rate Flow Feed ×=
5.3. Startup of VNX-HH modules
• Make sure that modules are correctly connected to the DC power source.
• Make sure that the VNX product line is directed to drain.
• Turn on the feed water. Adjust valves to obtain the desired flows and pressures in the product and reject streams. The reject flow is set depending on the feed water hardness level. Section 5.2 examines the necessary flow calculations and flow restrictions for the VNX50HH-2 Module. Ensure that the piping connections have been established using CEDI product to feed the concentrate (Reject) inlet.
• Concentrate feed pressure and Dilute Outlet pressure will be equal for the VNX50HH-2
Module due to the concentrate feed requirements. Valves should be adjusted to ensure that the module is operating with the correct recovery and adjusted to ensure that the product outlet pressure is about 2-10 psig higher than the reject outlet pressure at the desired flow rates. See Example Pressure Scenario Below.
25 PSIG 50 PSIG 25 PSIG Outlet
• Adjust the DC power supply to the current setting of 8 amps. See Section 4 for more details.
• Test all flow switches and interlocks to ensure VNX DC power is shut off when flow is interrupted.
• Continue to direct the product water to drain until it reaches the desired quality.
• Once product reaches the desired quality, connect to process. Readjust pressures as
required to maintain product outlet pressure 2-10 psi above the reject outlet pressure.
• When the system is at steady state (quality in specification and stable operation), record operating data on the data sheet provided at the end of section 7.
Dilute
Concentrate
FEED
25 PSIG FEED
15 PSIG
Dilute Outlet
_ Conc Outlet
15 PSIG 10 PSID
Equation 5-1: Recovery Equations
Outlet Dilute outlet compared to the Concentrate Outlet
IONPURE ® VNX50HH-2 CEDI Modules
Page 18 IP-MAN-VNX50HH2
6. MAINTENANCE AND TROUBLESHOOTING
The following section details the maintenance procedures for the VNX module. It contains general maintenance information and specific maintenance information for cleaning and sanitizing the modules.
The cleaning chemical volumes and flows detailed in this section are for a single VNX module. Multiply chemical volumes by number of modules in system
This section also lists possible problems and troubleshooting procedures for the VNX module. All operators and personnel involved with the module should read and become familiar with all maintenance and troubleshooting procedures.
6.1. General Maintenance Guidelines
Operating Data Log Sheet
VNX system log sheets should be filled out daily to provide early detection of problems that could jeopardize the warranty and potentially damage the module. A typical log sheet is included at the end of the troubleshooting in Section 7. Because instrumentation may vary depending on the type of system the module is installed into, this log sheet may not apply to your particular system. The system manual should contain log sheets more appropriate for your particular system. However, the items in bold must be filled out to maintain module warranty. Periodic Maintenance
Perform the following tests at least once every six months. Check the Troubleshooting portion in Section 7 for any recommendations that are not listed below.
• Check for any water leakage from the module. If leakage is observed,
see the Troubleshooting subsection for possible solutions. • Periodically tighten all electrical connections.
6.2. Specific Maintenance Guidelines
Periodically, the VNX module may need cleaning or sanitization. Cleaning the module removes scale and resin/membrane foulants.
Before starting any cleaning or sanitization procedure, see subsection 6.7 for recommended cleaning solutions
Do not run a cleaning or sanitizing solution through the system with DC power to the VNX module. Make sure the DC power is off before cleaning.
IONPURE ® VNX50HH-2 CEDI Modules
Page 19 IP-MAN-VNX50HH2
6.3. Cleaning Circumstances
The module may need CLEANING if:
• product differential pressure increases by 50% without a change in temperature and flow, or
• reject differential pressure increases by 50% without a change in temperature and flow, or
• product quality declines without a change in temperature, flow, or feed conductivity, or
• the module electrical resistance increases by 25% without a change in temperature.
The above factors may indicate module fouling or scaling. Contact your Local service Provider to determine if the module needs cleaning or for the best cleaning procedure.
6.4. Sanitization Circumstances
The system may require periodic SANITIZATION if the product water calls for low levels of bacteria (user specific requirement).
6.5. Required Cleaning and Sanitizing Equipment
The following equipment must be constructed of material compatible with the recommended cleaning solutions.
Thoroughly flush all plumbing and other equipment before cleaning or sanitization to remove debris that might damage the system.
During cleaning, the following equipment is required:
Tank Connect a tank to the VNX system. The tank should be large enough to accommodate solution volumes as shown in this section. The cleaning solution will be prepared in this tank. Pump Install a cleaning pump between the system and the cleaning tank. The pump must provide a minimum discharge pressure of at least 30 psig (2 bar) for VNX50-HH installations. For the best results, size pumps for the maximum possible flow up to the values listed in Table 6-1. The construction materials of the wetted surfaces in the pump must be compatible with the cleaning solutions. Plastics generally work well with most cleaning chemicals. During cleaning or chemical sanitization, adjust flow rates as follows to maintain flow velocity in all spacers (use the highest flow rate possible per Table 6-1):
Table 6-1: Cleaning Flow Rates
VNX50-HH min – max
Product Flow 25-50 gpm (5.7 -11.4 m3/hr)
Dilute Flow 30-75 gpm (6.8 – 17 m3/hr)
Reject Flow Calculation
0.5 x Product Flow
Reject Flow 5-25 gpm (1.14 - 5.7 m3/hr)
Pump Capacity 30-75 gpm (5.7 - 17 m3/hr)
IONPURE ® VNX50HH-2 CEDI Modules
Page 20 IP-MAN-VNX50HH2
The preferred cleaning flow rates are nominal product flow and reject flow base on the module reject flow calculations in Table 6-1. Valves and Hoses Figure 6-1 shows a typical flow diagram for cleaning or sanitizing a VNX system. Valves are needed for mixing, cleaning, and draining the tank. Flexible hose is ideal for connecting cleaning equipment to the system. Verify that the construction materials of the valves and hose are compatible with the cleaning solutions.
6.6. System Preparation for Cleaning or Sanitization
NOTE: The following cleaning procedures are based on the piping setup shown in Figure 6-1. If your piping setup is different, you may need to alter these procedures.
• Turn off the DC power supply.
• Close the following valves to the VNX system:
o Feed Valve
o Product Valve
• Connect the discharge of the cleaning pump to the VNX feed CIP connection.
• Connect the module’s feed, reject and product CIP connections to the cleaning tank.
• Verify that all piping connections are secure.
• Close cleaning pump discharge valve until ready to pump the cleaning solution into the VNX system.
IONPURE ® VNX50HH-2 CEDI Modules
Page 21 IP-MAN-VNX50HH2
Figure 6-1: Typical VNX-HH System Piping for Cleaning and Sanitization.
6.7. Cleaning and Chemical Sanitization Procedures
• Avoid direct skin contact with cleaning chemicals. Wear safety glasses and protective clothing.
• Pressure test cleaning skid with water before adding chemicals to tank.
• Flush all hoses and tank with clean water BEFORE adding chemicals.
• To reduce the possibility of chemical sprays, relieve the pressure in chemical lines before
disassembly.
• Follow the manufacturer’s chemical safety instructions on the container labels.
• Check the pH level in any solution before letting it flow to the drain. Follow all discharge
limitations.
• Do not run a cleaning solution through the system when DC power is applied to the module. Make sure the DC power is off before cleaning.
IONPURE ® VNX50HH-2 CEDI Modules
Page 22 IP-MAN-VNX50HH2
The system can be cleaned and sanitized with any of five (5) different solutions, depending on what needs to be removed:
• Hydrochloric acid (2%) – For removing scale and metal oxides. • Sodium chloride/sodium hydroxide (5% brine/1% caustic) – For removing organic
foulants and biofilm. • Sodium percarbonate – For removing organic foulants, reducing pressure drop, and
sanitizing. • Peracetic Acid – Used for routine sanitizing to discourage the growth of bacterial films. • Aggressive Multi-Agent cleaning for Biofilm– Recommended for general biofouling with
increase in pressure drop. This aggressive cleaning protocol consists of 5% sodium chloride followed by a 2% sodium hydroxide and then followed by a 1% sodium percarbonate with a final 5% sodium chloride flush. The combination of these treatments performed sequentially has proven to be more effective than any single treatment performed separately.
• Aggressive Multi-Agent cleaning for Fouling/scaling – Recommended for fouling and scale remediation with drop in performance combined with increased electrical stack resistance. Aggressive sequential cleaning protocol of salt (5% sodium chloride) then followed by caustic (2% sodium hydroxide) followed by acid (2% hydrochloric acid) with a final 5% sodium chloride flush (see Service Bulletin 2007-02). Extended soaking or increasing the acid concentration in the range from 2%-4% HCl based on the severity of electrical stack resistance increase increases the benefits of this treatment.
NOTE: If you are unsure whether the module is scaled or organically fouled, clean first with brine, then
caustic clean followed by acid clean.
6.8. Cleaning with 2.0% Hydrochloric Acid (HCl)
Hydrochloric acid is a corrosive chemical. Wear safety glasses, gloves, and protective clothing when using this or any corrosive chemicals.
Cleaning with Hydrochloric Acid involves three steps:
1. Hydrochloric acid treatment (2% HCl),
2. A salt flush (5% NaCl), and
3. Water flush. STEP 1: Recirculating the HCl Solution
NOTE: This is the minimum amount of HCl required. It may be necessary to use additional HCl to effectively clean a scaled Module. Monitor the pH of the solution during the recirculation period. If the pH begins to rise, add more HCl to maintain a pH of approximately 0.5. Circulating HCl through the system removes scale and metal oxides from the module.
Chemicals necessary for Step 1 (2% HCl) VNX50-HH Water (RO permeate or CEDI product) 99 gal (375 liters) 36.5% Hydrochloric Acid (HCl) 4.2 gal (16.2 liters)
NOTE: The following cleaning procedures are based on the piping setup shown in Figure 6-1.
1. Prepare the VNX system for chemical cleaning. Follow the instructions in Section 6.5 and 6.6. Make sure the tank drain valve is closed.
IONPURE ® VNX50HH-2 CEDI Modules
Page 23 IP-MAN-VNX50HH2
2. Fill the tank with the required amount of water.
3. Mix the required amount of 36.5% (concentrated) HCl with the water in the tank. Additional HCl may be required during the recirculation period.
4. Open the pump suction and pump bypass valves completely.
5. Start the cleaning pump.
6. When chemicals are well mixed, gradually open the pump discharge valve while closing the pump bypass valve to adjust the product and reject flow rates to the values given in Section 6.5.
7. Recirculate the solution through the module for 30 minutes. Longer contact time may be desirable in some instances. If longer contact time is desired, contact Ionpure Technical Support.
8. Monitor the pH of the solution during the recirculation period. If the pH begins to rise, add more HCl to maintain a pH of approximately 0.5.
9. Turn off the cleaning pump.
10. Check pH. Neutralize if necessary. Drain the tank.
STEP 2: Salt Flush To Drain
This salt flush rinses the cleaning solution from the module, and returns the ion exchange resin to the sodium and chloride forms.
Chemicals needed for Step 2 (5% NaCl) VNX50-HH Water (RO permeate or CEDI product 180 gal (675 liters) Sodium chloride (NaCl) 75 lbs (34.2 kg)
1. Remove product and reject outlet lines from the cleaning tank, and direct to
drain.
2. Fill the tank with the water.
3. Dissolve the sodium chloride (NaCl) in the water.
4. Start the cleaning pump and flush through the module to drain for about three minutes.
5. Turn off the cleaning pump.
6. Drain the tank.
STEP 3: Water Flush To Drain
Water flushes the cleaning solution and salt out of the system, and prepares the system for return to operation. 1. Close the pump discharge valve. Keep product and reject lines directed to drain
and disconnect the cleaning equipment from the module.
IONPURE ® VNX50HH-2 CEDI Modules
Page 24 IP-MAN-VNX50HH2
2. Turn on the feed water supply to the system. Slowly open the feed valve to allow RO product water to flow through the module to drain.
3. After flushing all residual cleaning solutions from the system, follow the initial start-up procedures in Section 5 of this manual. Start without the DC power applied to the VNX module for five minutes and then restore normal DC power.
6.9. Cleaning with 5% Brine + 1% Caustic Solution
Sodium Hydroxide is a corrosive chemical. Wear glasses, gloves, and protective clothing when using this or any corrosive chemicals.
A 5% sodium chloride (NaCl)/1% sodium hydroxide (NaOH) solution works well for removing organic foulants from the module. Also see Ionpure.com for Service Bulletin IPSB-2007-2.
This procedure involves two steps:
1. Brine/caustic cleaning.
2. Water flush.
STEP 1: Cleaning Solution Recirculation
This step removes organic foulants from the module.
Chemicals necessary for Step 1: VNX50-HH Water (RO permeate or CEDI product) 99 gal (375 liters) Sodium chloride (NaCl) 42 lbs (18.75 kg) Sodium hydroxide (NaOH) pellets OR 50% NaOH
8.25 lbs (375 kg) 1.29 gal (4.8 liters)
NOTE: The following cleaning procedures are based on the piping setup shown in Figure 6-1
1. Prepare the VNX system for chemical cleaning. Follow the instructions in Section 6.5. Make sure the cleaning tank drain valve is closed.
2. Fill the tank with the required amount of water.
3. Open the cleaning pump bypass valve and suction valve completely.
4. Start the cleaning pump.
5. Dissolve the specified amount of sodium chloride (NaCl) in the water.
6. Dissolve or mix the specified amount of sodium hydroxide (NaOH) in the water.
7. When chemicals are well mixed, gradually open the cleaning pump discharge valve while closing the bypass valve to adjust the product and reject flow rates to the values given in Section 6.5.
8. Recirculate the solution through the module for 30-60 minutes.
9. Turn off the cleaning pump.
10. Check pH. Neutralize if necessary. Drain the tank.
IONPURE ® VNX50HH-2 CEDI Modules
Page 25 IP-MAN-VNX50HH2
STEP 2: Water Flush To Drain
This Step flushes the cleaning solution out of the system, and prepares the system for return to operation.
1. Remove product and reject lines from the cleaning tank and direct to drain.
2. Close the cleaning pump discharge valve.
3. Turn on the feed water supply to the system. Slowly open the feed valve to allow RO product water to flow through the module to drain.
4. After flushing all residual cleaning solutions from the system, disconnect the cleaning equipment.
5. Follow the initial start-up procedures in Section 5 of this manual. Start without the DC power applied to the VNX module for five minutes, and then apply normal operating DC power.
6.10. Cleaning or Sanitizing with Sodium Percarbonate
Sodium percarbonate, sodium carbonate, and hydrogen peroxide are corrosive chemicals. Avoid contact with these chemicals.
Do not use powdered sodium percarbonate. It may contain impurities that could harm the module.
Sodium percarbonate is a combination of sodium carbonate (soda ash) and hydrogen peroxide. It is an effective biocide and it reduces organic fouling and plugging. In addition, it is an effective cleaner for removal of biofilms. Flush the VNX module with a 5% Sodium Chloride (NaCl) solution both before and after sodium percarbonate sanitization. The initial NaCl rinse removes metal ions, particularly calcium, and magnesium ions from the module.
The sanitization procedure for sodium percarbonate involves five steps:
1. An initial salt flush
2. A water flush
3. The percarbonate cleaning
4. A second salt flush
5. A final water flush
STEP 1: Initial Salt Flush To Drain
This initial 5% NaCl rinse removes any metal ions, particularly calcium and magnesium ions, from the module.
Chemicals needed for Step 1 (5%NaCl): VNX50-HH Water (RO permeate or CEDI product) 180 gal (675 liters) Sodium chloride (NaCl) 75 lbs (34.2 kg)
NOTE: The following cleaning procedures are based on the piping setup shown in Figure 6-1
IONPURE ® VNX50HH-2 CEDI Modules
Page 26 IP-MAN-VNX50HH2
1. Follow the instructions in Section 6.5 to prepare the VNX system for cleaning or sanitization. Make sure that the cleaning tank drain valve is closed.
2. Fill the tank with the required amount of water.
3. Dissolve required amount of sodium chloride (NaCl) in the tank water.
4. Open the cleaning pump suction valve and bypass valve completely.
5. Divert the product and reject to drain.
6. Start the cleaning pump. When chemicals are well mixed, gradually open the cleaning pump discharge valve while closing the cleaning pump bypass valve to adjust the product and reject flow rates to the values given in Section 6.5.
7. Flush the salt solution to drain for about 3 minutes.
8. Turn off the cleaning pump.
9. Drain the tank.
STEP 2: Water Flush To Drain
Water flush rinses the salt solution from the module before cleaning solution is introduced.
Chemical necessary for Step 2: VNX50-HH Water (RO permeate or CEDI product) 180 gal (675 liters)
1. Fill the tank with the required amount of water.
2. Start the cleaning pump and flush to drain for about three minutes.
3. Turn off the cleaning pump.
4. Drain the tank.
STEP 3: Cleaning Solution Recirculation
This 1% sodium percarbonate step removes organics and biofilm.
Chemicals necessary for Step 3 (1% 2Na2CO3 3H2O2) sodium percarbonate:
VNX50-HH
Water (RO permeate or CEDI product) 99 gal (375 liters) 100% Sodium carbonate (Na2CO3) 8.25 lbs (3.75 kg) 30% Hydrogen peroxide (H2O2) 2.4 gal (8.4 liters)
1. Close the cleaning pump discharge valve.
2. Connect the product and reject lines to the cleaning tank.
3. Fill the tank with the required amount of water.
4. Dissolve the sodium carbonate (Na2CO3) in the water. Make sure the sodium carbonate is fully dissolved before proceeding to the next step.
5. Mix the 30% hydrogen peroxide (H2O2) into the solution in the tank.
6. Open the cleaning pump suction valve and bypass valve completely.
IONPURE ® VNX50HH-2 CEDI Modules
Page 27 IP-MAN-VNX50HH2
7. Start the cleaning pump. When chemicals are well mixed, gradually open the cleaning pump discharge valve while closing the bypass valve to adjust the product and reject flow rates to the values given in Section 6.5.
8. Recirculate the solution through the module for 30 minutes. Some gas will be produced. In addition, the module pressure drop will increase during this procedure.
9. Turn off the cleaning pump.
10. Check pH. Neutralize if necessary. Drain the tank.
STEP 4: Salt Flush To Drain
This salt flush rinses the cleaning solution from the module, and returns the ion exchange resin to the sodium and chloride forms.
Chemicals needed for Step 4 (5%NaCl): VNX50-HH Water (RO permeate or CEDI product) 180 gal (675 liters) Sodium chloride (NaCl) 75 lbs (34.2 kg)
1. Remove product and reject outlet lines from the cleaning tank, and direct to drain.
2. Fill the tank with the water.
3. Dissolve the sodium chloride (NaCl) in the water.
4. Start the cleaning pump and flush to drain for about three minutes.
5. Turn off the cleaning pump.
6. Drain the tank.
STEP 5: Water Flush to Drain
This step flushes the cleaning solution out of the system, and prepares the system for return to operation.
1. Close the cleaning pump discharge valve. Keep product and reject lines directed
to drain and disconnect the cleaning equipment from the module.
2. Turn on the feed water supply to the system. Slowly open the feed valve to allow RO product water to flow through the module to drain.
3. After flushing all residual cleaning solutions from the system, follow the initial start-up procedures in Section 5 of this manual. Start without the DC power applied to the VNX module for five minutes, and then apply normal operating DC power.
6.11. Sanitizing with Peracetic Acid
Peracetic Acid is a mixture of corrosive chemicals. Avoid contact with these chemicals.
IONPURE ® VNX50HH-2 CEDI Modules
Page 28 IP-MAN-VNX50HH2
Do not run a sanitization solution through the system when DC power is applied to the VNX module.
The sanitization procedure for Peracetic Acid involves five steps:
1. An initial salt flush
2. A water flush
3. The Peracetic Acid cleaning
4. A second salt flush
5. A final water flush
STEP 1: Initial Salt Flush To Drain This initial 5% NaCl rinse removes any metal ions, particularly calcium and magnesium ions, from the module.
Chemicals needed for Step 1 (5%NaCl): VNX50-HH Water (RO permeate or CEDI product) 180 gal (675 liters) Sodium chloride (NaCl) 75 lbs (34.2 kg)
NOTE: The following cleaning procedures are based on the piping setup shown in Figure 6-1.
1. Follow the instructions in Section 6.5 to prepare the VNX system for cleaning or sanitization. Make sure that the cleaning tank drain valve is closed.
2. Fill the tank with the required amount of water.
3. Dissolve required amount of sodium chloride (NaCl) in the tank water.
4. Open the cleaning pump suction valve and bypass valve completely.
5. Divert the product and reject to drain
6. Start the cleaning pump. When chemicals are well mixed, gradually open the cleaning pump discharge valve while closing the bypass valve to adjust the product and reject flow rates to the values given in Section 6.5.
7. Flush the salt solution to drain for about 3 minutes.
8. Turn off the cleaning pump.
9. Drain the tank.
STEP 2: Water Flush To Drain
Water flush rinses the salt solution from the module before cleaning solution is introduced.
Chemical necessary for Step 2: VNX50-HH Water (RO permeate or CEDI product) 180 gal (675 liters)
1. Fill the tank with the required amount of water.
IONPURE ® VNX50HH-2 CEDI Modules
Page 29 IP-MAN-VNX50HH2
2. Start the cleaning pump and flush to drain for about three minutes.
3. Turn off the cleaning pump.
4. Drain the tank.
STEP 3: Sanitization Solution Recirculation and Soak
This step sanitizes the system.
Chemicals needed for Step 3: VNX50-HH Water (RO permeate or CEDI product) 99 gal (375 liters)
Peracetic Acid Solution* 0.99 gal (3.75 liters)
* Quantity based on a peracetic acid solution of 20% Hydrogen Peroxide with 4% peracetic acid. Do not exceed a final concentration of 0.2% peroxide and 0.04% peracetic acid
1. Close the cleaning pump discharge valve.
2. Connect the product and reject lines to the cleaning tank.
3. Fill the tank with the required amount of water.
4. Mix the peracetic acid solution into the tank.
5. Open the cleaning pump suction valve and bypass valve completely.
6. Start the cleaning pump. When chemicals are well mixed, gradually open the cleaning pump discharge valve while closing the bypass valve to adjust the product and reject flow rates to the values given in Section 6.5.
7. Recirculate the solution through the module for 30 minutes.
8. Turn off the cleaning pump.
9. Allow the system to soak in the peracetic acid solution for up to 90 minutes.
10. Check pH. Neutralize if necessary. Drain the tank.
STEP 4: Salt Flush To Drain
This salt flush rinses the cleaning solution from the module, and returns the ion exchange resin to the sodium and chloride forms.
Chemicals needed for Step 4 (5%NaCl):
VNX50-HH
Water (RO permeate or CEDI product)
180 gal (675 liters)
Sodium chloride (NaCl) 75 lbs (34.2 kg)
1. Remove product and reject outlet lines from the cleaning tank, and direct to drain.
2. Fill the tank with the water.
IONPURE ® VNX50HH-2 CEDI Modules
Page 30 IP-MAN-VNX50HH2
3. Dissolve the sodium chloride (NaCl) in the water.
4. Start the cleaning pump and flush to drain for about three minutes.
5. Turn off the cleaning pump.
6. Drain the tank.
STEP 5: Water Flush to Drain
This step flushes the cleaning solution out of the system, and prepares the system for return to operation.
1. Close the cleaning pump discharge valve. Keep product and reject lines directed to
drain and disconnect the cleaning equipment from the module.
2. Turn on the feed water supply to the system. Slowly open the feed valve to allow RO product water to flow through the module to drain.
3. After flushing all residual cleaning solutions from the system, follow the initial start-up procedures in Section 5 of this manual. Start without the DC power applied to the VNX module for five minutes, then slowly ramp up to apply the normal DC power.
IONPURE ® VNX50HH-2 CEDI Modules
Page 31 IP-MAN-VNX50HH2
7. TROUBLESHOOTING
The troubleshooting chart in this Section is a diagnostic guide. If the VNX system does not respond to the recommended solutions, do not attempt further repairs. Call your Local Service Provider. Before calling:
• Become thoroughly familiar with the module and all troubleshooting procedures.
• Prepare a list of all problems encountered while operating the equipment.
• Have your monitoring log sheets at hand.
• Have your module’s model and serial numbers at hand. This information can be found on the end plate on the plumbing side (Cathode).
Table 7-1: Troubleshooting Procedures for VNX modules
PROBLEM CAUSE SOLUTION
Module has loosened during shipment, movement, or operation
Contact Ionpure Technical support Module leaks
Module is faulty Contact your Local Service Provider
Plumbing leaks Module adapters are loose Tighten adapters, check O-rings
Poor water quality with power ON to unit
Operating current incorrectly set
Measure feed conductivity and CO2. Recalculate current according to Section 4 and adjust as necessary.
Module is fouled, scaled, or oxidized
See Troubleshooting flow chart at the end of this section.
Obstruction downstream Check if a downstream valve is inadvertently closed.
System is plugged with particulate matter or fouled
See Troubleshooting Flow Chart at the end of this section.
Loss of flow and/or increase in feed pressure
Loss of feed flow 1. Check if an upstream valve is inadvertently closed. 2. Check for leaks or if an upstream bypass valve is inadvertently open. 3. Check feed source output (for example, a pump).
IONPURE ® VNX50HH-2 CEDI Modules
Page 32 IP-MAN-VNX50HH2
VNX MODULE LOG SHEET
Customer Name: ___________________________Module Serial Number: _____________
DATE
TIME OF DAY
FEED WATER TEMPERATURE °C
FEED WATER TOTAL HARDNESS ppm CaCO3
FEED WATER TOTAL CHLORINE ppm as Cl2
FEED CARBON DIOXIDE ppm as CO2
FEED CONDUCTIVITY µmho/cm
PRODUCT RESISTIVITY Mohm-cm
DC VOLTAGE volts
DC CURRENT amps
MODULE RESISTANCE (volts/amps) ohms
PRODUCT FLOW gpm or m3/h
REJECT FLOW gpm or m3/h
DILUTE INLET PRESSURE psig or bar
DILUTE OUTLET PRESSURE psig or bar
PRODUCT DP (Dilutein – Diluteout) psig or bar
CONCENTRATE INLET PRESSURE psig or bar
CONCENTRATE OUTLET PRESSURE psig or bar
CONCENTRATE DP (Concin - Concout) psig or bar
COMMENTS:
IONPURE ® VNX50HH-2 CEDI Modules
Page 33 IP-MAN-VNX50HH2
Are anyDC wires loose?
Tighten connections
Feedwater temp
drop?
Excesshardness inCEDI reject?
Increase in DC voltageis normal
Acid clean,reduce CEDI feedhardness and/or
lower CEDI recovery
Yes
No
No
Yes
Yes
No
Call you local serviceprovider
Troubleshooting Flow Chart - Increase in DC VoltsPage 1 of 1
START HERE
Caustic clean,reduce CEDI feed
silica and/orlower CEDI recovery
Excesssilica in
CEDI reject?Yes
No
Cleaning removedorganics from resin:
review process designand operation
Does NaCl/NaOHcleaning help? Yes
No
IONPURE ® VNX50HH-2 CEDI Modules
Page 34 IP-MAN-VNX50HH2
RO making too little
water?
Clean RO orincrease RO pressureor increase RO feed
temperature
CEDI control valves closed too
far?
Does percarbonatecleaning CEDI
help?
CEDI ∆P much higher in
NaOH than NaCl? *
Readjust CEDI control valves, inlet
and/or outlet
Pluggage due toparticulates or
biofouling - evaluatesystem design and
operation
CEDI resin damaged.Call Technical
Support
Yes
No
No
Yes
Yes
Yes
No
Call your local serviceprovidor
Troubleshooting Flow Chart - Low CEDI Product or Reject FlowPage 1 of 1
Product flowmeterincorrect?
Recalibrate or replaceflow meterYes
No
START HERE
* Compare product pressure drop when circulating5% NaCl solution as opposed to 1% NaOH solution
No
Does Multi-Agent cleaning
help?
Pluggage due toparticulates or
biofouling - evaluatesystem design and
operation
Yes
No
IONPURE ® VNX50HH-2 CEDI Modules
Page 35 IP-MAN-VNX50HH2
Reduce TDS(clean or replaceRO membranes)
or lower CEDI prodflow
CEDIfeed CO2changed?
CEDIfeed SiO2too high?
Yes
Go to next flowchart
Troubleshooting Flow Chart - Low CEDI Product Water QualityPage 1 of 3
CEDIfeed TDSchanged?
Adjust DC amperageUp for higher TDS
Down for lower TDS
START HERE
Check IP-Pro:is desired quality
possible?Yes Yes
No
No
Check IP-Pro:is desired quality
possible?
Adjust DC amperage:up for higher CO2
down for lower CO2
YesYes
Increase pH aheadof RO to remove CO2
(contact Tech Support)or lower CEDI prod
flow
No
No
No
Clean or replaceRO membranes or
reduce RO recovery
IONPURE ® VNX50HH-2 CEDI Modules
Page 36 IP-MAN-VNX50HH2
Have DC voltsincreased?
Reduce flow or reduce feed
conductivity equivalent
See separatetroubleshooting
chart for DC voltsYes
No
Go to Next Flowchart
Product flowincreased?
Yes
Troubleshooting Flow Chart - Low CEDI Product Water QualityPage 2 of 3
Continued from previousflowchart
Increase DC amperage
Check IP-Pro:is desired quality
possible?Yes
No
No
Is reject out psi> product out psi?
No
Adjust product out to2-5 psi > reject outYes
Go to chart forDC Volts
IONPURE ® VNX50HH-2 CEDI Modules
Page 37 IP-MAN-VNX50HH2
Did cleaning restore flow?
Clean CEDI with NaCl/NaOH and
Na2CO3/H2O2
Resin oxidized(affects flow & quality)
or fouled(affects quality)
Has product flowdecreased?
Troubleshooting Flow Chart - Low CEDI Product Water QualityPage 3 of 3
Continued fromPrevious Flowchart
No
Yes
Contact Ionpure TechnicalSupport
www.ionpure.com
Did cleaningrestore quality?
No
Removed particulatesand/or biofilm:review process
design & operation
Yes
Also removedorganics from resin:
review processdesign & operation
Yes
No
Check feed water Cl2Check sanitization
procedure
IONPURE ® VNX50HH-2 CEDI Modules
Page 38 IP-MAN-VNX50HH2
8. SHUTDOWN AND STORAGE
This section contains shutdown procedures for a VNX module. Under certain circumstances, bacterial growth can occur quickly in water left stagnant within each module and the overall system.
8.1. SYSTEM SHUTDOWN
• Shut off feed water to VNX module(s)
• Drain standing water out of VNX module(s)
• Close isolation valves to prevent evaporation of water in membranes and resins.
8.2. STARTUP AFTER SHUTDOWN
• Divert product outlet to drain.
• Turn on feed water to VNX module(s)
• Operate unit with DC power on, flushing to drain.
• If desired, sanitize VNX module(s).
IONPURE ® VNX50HH-2 CEDI Modules
Page 39 IP-MAN-VNX50HH2
APPENDIX A: VNX50HH-2 MODULE SPECIFICATIONS
A.1 Module Dimensions and Weight
PART NUMBER DIMENSIONS, WEIGHT IP-VNX50HH-2
Height: 20 in (50.8 cm) Width: 20 in (50.8 cm) Length: 84.6 in (214.9 cm) Weight (wet): 825 lb (375 kg)
A.2 VNX50-HH Module Inlet & Outlet Connections
Piping Connections Size of installed PVC ports on module
Alternate Polypropylene Kit
Dilute Inlet 1 ½ ” Sch-80 female socket 50mm Butt Weld Product Outlet 1 ½ ” Sch-80 female socket 50mm Butt Weld Concentrate Inlet 1 ½ ” Sch-80 female socket 50mm Butt Weld Reject Outlet 1 ½ ” Sch-80 female socket 50mm Butt Weld
See Drawings in Appendix B for location of connections. See Drawings in Appendix C for Connection Drawings.
A.3 VNX50-HH Module Flow Rates, Pressure Drops & Plumbing Connections
Module VNX50-HH 80% Recovery Flow Rates: gpm (m3/hr) 80% Recovery minimum: 20 (4.5) 80% Recovery nominal: 40 (9.1) 80% Recovery maximum: 62.5 (11.4) Pressure Drop psid (bar) Typical @ nominal flow 20-30 (1.4-2.1)
Feedwater Conductivity (FCE) <40 µS/cm Product Resistivity (RO Permeate) > 16 megohm-cm*
Temp range 5-45 °C Recovery 80-90% Silica Removal >90% Sodium Removal ≥99.5% Chloride Removal ≥99.8% Feed / Product Plumbing orientation
Inlet and outlet can be on same end or opposite ends
Concentrate inlet / Reject Plumbing orientation
Inlet and outlet can be on same end or opposite ends
* Actual performance can be evaluated using IP-Pro projection software available from Ionpure.
IONPURE ® VNX50HH-2 CEDI Modules
Page 40 IP-MAN-VNX50HH2
APPENDIX B: VNX50HH LAYOUT & ELEVATION DRAWING B-1
IONPURE ® VNX50HH-2 CEDI Modules
Page 41 IP-MAN-VNX50HH2
APPENDIX B: VNX50-HH - PID DRAWING B-2
IONPURE ® VNX50HH-2 CEDI Modules
Page 42 IP-MAN-VNX50HH2
APPENDIX B: VNX50-HH - ELECTRICAL CONNECTIONS DRAWING B-3
IONPURE ® VNX50HH-2 CEDI Modules
Page 43 IP-MAN-VNX50HH2
APPENDIX C: PORT ADAPTER AND PLUG DRAWINGS VNX50-HH - PVC CONNECTION DRAWING C-1
IONPURE ® VNX50HH-2 CEDI Modules
Page 44 IP-MAN-VNX50HH2
IONPURE ® VNX50HH-2 CEDI Modules
Page 44 IP-MAN-VNX50HH2
APPENDIX C: VNX50HH-2 - PVC PLUG DRAWING C-2
IONPURE ® VNX50HH-2 CEDI Modules
Page 45 IP-MAN-VNX50HH2
IONPURE ® VNX50HH-2 CEDI Modules
Page 45 IP-MAN-VNX50HH2
APPENDIX C: VNX50-HH - PP CONNECTION DRAWING C-3
IONPURE ® VNX50HH-2 CEDI Modules
Page 46 IP-MAN-VNX50HH2
APPENDIX C: VNX50-HH - PP PLUG DRAWING C-4