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Membrane Filtration Products Installation, Operation and Maintenance

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WELCOME This manual is provided for installation, operation, and maintenance of a Reverse Osmosis (RO) water purification system designed and built by Water Equipment Technologies, a division of ITT WET. It is intended to be used, along with the component manufacturer literature included in the Appendix, to provide comprehensive and accurate information for the operation of this RO system.

ITT WET wants to ensure your complete satisfaction with their products and services. To achieve this goal, we offer customers our worldwide network of technical resources, backed up by the diverse capabilities of the ITT Industries corporate family. We strive for continuous improvement and welcome your comments. Contact your WET representative for sales, technical support, and service using the contact information provided with this manual.

DISCLAIMER AND LIMITATIONS This manual discloses proprietary information developed by Water Equipment Technologies. This information is provided for the purpose of operating and maintaining its RO systems, and may not be used for any other purpose. It is recommended that this manual be read and understood before performing installation, operation, and maintenance of the RO system. The equipment warranty may be voided if instructions are not followed correctly.

The information provided may not cover all possible variations of detail in relation to equipment use. Please contact the Service Department for any technical questions that are not specifically answered in this manual.

The Seller reserves the right to make enhancements or changes that may not be included in the manual. Therefore, it is understood that the material presented here is subject to change without notice and is for informational purposes only.

This manual is believed to be complete and accurate at the time of publication. However, the Seller assumes no responsibility for the technical content of the manufacturer literature. Due to the inability to verify all vendor-provided materials, we can assume no responsibility for any errors and shall not be liable for damages in connection with the use of this manual. Copyright 2006 ITT WET. All rights reserved.

IMPORTANT USER INFORMATION

PLEASE DO NOT DISCARD THIS MANUAL CONTAINS IMPORTANT INFORMATION WHICH SPECIFICALLY APPLIES TO THIS UNIT. THIS INFORMATION MAY BE NEEDED AS REFERENCE DURING ANY FUTURE SERVICING OF THE SYSTEM.

RO MODEL___________________________________

INSTALLED BY________________________________

TELEPHONE__________________________________

INITIAL STARTUP DATE________________________

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Safety Check Item Dont Do This Special Attention

SAFETY NOTES READ AND UNDERSTAND BEFORE PROCEEDING

Safety Check Item

Dont Do This

Special Attention

WARNING

High Voltage Electricity Spinning Parts High Pressure Components Pressurized Water Hazardous Chemicals Noise

Failure to follow good safety practices and the instructions included in this manual may result in damage to the unit, its surroundings, personal injury or death.

Pressure Reverse Osmosis units operate by forcing water at high pressure against a semi-permeable membrane. The higher the TDS (Total Dissolved Solids) of the feedwater, the higher the pressure required to produce acceptable amounts of purified water. Fresh water typically requires only about 100 psig to suitably overcome osmotic pressure, while salt water may require up to 1000 psig. Even a small leak at elevated pressures can be dangerous.

Electricity Electricity and water DO NOT MIX. Every effort is made to insure that the electrical equipment on our systems is resistant to water intrusion. Once installed, the system is subject to many factors beyond our control. The reject water of this RO unit is a concentrated saline solution with high electrical conductivity. Spills

should be immediately cleaned. Leaks of any kind should be repaired as soon as possible. Check all electrical components on a regular basis to insure that water-resistant seals are still in place and

functional. DO NOT DRILL HOLES IN THE TOP SURFACE OF ANY ELECTRICAL BOXES. Chemicals Exposure to the highly concentrated reject water, especially at the high pressures of an operating RO unit,

can cause injury or permanent damage to the eyes, skin, and mucous membranes. Exposure to the chemicals used in cleaning, disinfection, and preservation is dangerous and may cause

permanent damage. Test all hoses and connections before using any cleaning system to clean or preserve the membranes. Do

NOT allow worn hoses or fittings to be used. Avoid contact with chemicals by wearing eye and skin protection equipment. Avoid breathing chemical

fumes.


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Table of Contents

Section Page

System Description .................................................................................................................................5 System Specifications ...........................................................................................................................14 Installation .............................................................................................................................................15 Initial Startup .........................................................................................................................................17 Operation...............................................................................................................................................20 System Maintenance.............................................................................................................................22 Cleaning RO Membranes......................................................................................................................25 Disinfection............................................................................................................................................29 Preservation ..........................................................................................................................................30 Troubleshooting.....................................................................................................................................31

Appendix

Bill of Materials (Major Components) Chemical Injections Limited Warranty Warranty Service Policy RO Daily Operator Log Sheet RO Cleaning Log Sheet RO Maintenance Schedule

Drawings

RO System P&I Diagram G003380-9 RO Unit P&I diagram G003380-2 RO Unit Layout G003380-10 Electrical Schematics G003380-3 Sh1-4 RO Cleaning Connections G003380-12

OEM Literature

Pumps and Motors Instruments Electrical Data Mechanical Data


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System Description System Introduction This facility, as designed, will utilize common intake, pretreatment, post-treatment and storage.

In summary, raw seawater will flow through the intake structure where it will be pressurized by feed pumps and forwarded to the multimedia container. The filtered seawater will then flow to the cartridge filtration stage of the process. As filtered feed water is forwarded to the cartridge filters preceding the sea water Reverse Osmosis(RO) trains, an antifoulant and bisulfite materials will be injected to minimize the potential for deposition of foulants within the membrane arrays. Within the membrane arrays the raw seawater will be split into two streams the product and concentrate. The product from the RO trains can be further condition through the chemical injection systems as per the final requirements of the customer. The reject stream will be returned to the sea via the outfall.

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Multimedia Filter A multi-media filter system is supplied for reduction of suspended solids and reduction of raw water turbidity. These filters may also provide better run time life and operational cost savings for the five-micron cartridge filter. There are three 28 multimedia filters for the RO unit to provide pretreatment of the feed flow, removing particulates of 20 micron diameter or greater. This layered bed approach allows high capacity depth filtration. A backwash flow controller is used to insure full turnover of the bed without loss of media.

Inlet and outlet transmitters monitor the pressure developed across the media to determine the correct time to backwash and rinse the filters. During backwash, the other filters remain in service while one filter is backwashed. The RO unit operation is suspended. Backwash frequency is dependent on feed water quality but should be backwashed once a week at a minimum.

Chemical Injection Antifoulant is injected into the feed stream to prevent fouling of the membranes with calcium carbonate and other scale forming constituents.

Sodium Bisulfite is injected into the feed stream to remove chlorine.

Chlorine is injected into the permeate stream before enter the product storage tank for disinfection.

These chemical stations will be in operation whenever the RO system is running. These chemical metering stations are provided with a metering pump, poly tank, and level switch to shut down the system in the event of low chemical level.


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SW-5.5 M3/H Layout This RO water treatment system is designed to provide up to 34,560 gallons of potable water per day, using sea water as the feed source.

This unit includes five micron pre-filtration, centrifugal high pressure pump, energy recovery pressure exchanger, PX, pressure exchanger booster pump, pressure vessels, and spiral wound thin film composite RO membranes. The system includes a permeate water flush cycle to minimize system biofouling and stagnation corrosion during shutdown periods. The entire water treatment process provides with a central process control system, PCS, based on a programmable logic controller, PLC, platform. The water treatment process is capable of automatic operation with minimal operator intervention. Safety devices is provided to protect the RO systems and all associated processes from common fault conditions.


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RO Theory of Operation Feedwater enters the system through a 2 motorized Inlet valve before passing through a pre-filter for removal of suspended particles 5 microns or larger.

The filtered water enters a RO pump which increases the water pressure to RO operating levels before being directed into the Membrane Pressure Vessels. Inside the Membrane Pressure Vessels, a portion of the feedwater, referred to as product water or permeate, passes through a membrane barrier that rejects suspended and dissolved solids. The remaining portion of feedwater, referred to as reject water or concentrate, carries contaminants out of the Membrane. The reject water is sent through an energy recovery device to generate a large pressure boost in the feed stream.

The RO permeate stream is monitored for conductivity and flow. The concentrate stream is monitored for pressure and flow. A Programmable Logic Controller (PLC) controls the RO functions to maintain most efficient operation within the design parameters of the system.

Designated recovery rate for this system is 38%. See the System Specifications for details.


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RO Flush This RO unit is designed with automatic preflush and postflush cycles.

Start-up of the unit initiates a (3) minute preflush cycle, in which the Inlet valve will open and allow feedwater to be pumped through the RO unit under low flow and low pressure. Preflush removes air from the system, ensures proper feed pressure to the RO pump, and allows antifoulant to stabilize at the desired level. When the preflush is completed, the RO starts normal processing.

Shutdown of the RO system includes a freshwater postflush to displace the concentrated feedwater from the system. When the RO is first started, the Flush/Clean (CIP) tank is filled with product water. When the RO unit shuts down due to an alarm condition or manual shutdown, the Inlet valve opens for a predetermined time to remove standing feedwater from the pre-filter housing, pump, and ROMAs. Then the CIP pump energizes and flushes the RO unit with product water from the tank. The postflush cycle is completed when the CIP tank reaches its designated low level.

Any alarm condition that shuts down the RO initiates a postflush cycle to protect the membranes.

When an RO unit shuts down due to a loss of mains supply, postflush does not occur.


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RO Alarms

Alarm activation is displayed on the operator interface. To clear an alarm, correct the cause, push the RESET button on the RO Control Panel. The alarm will repeat if the condition has not been corrected.

Refer to the Troubleshooting section of this manual for help in corrective maintenance diagnosis. The OEM Literature section contains more detailed RO system diagnostic information for reference.

Any alarm condition that shuts down the RO also initiates a postflush cycle to protect the membranes.

Alarms: LOW PRESSURE HIGH PRESSURE RO PUMP FAULT BOOSTER PUMP FAULT ERI DP HP ERI DP LP HIGH PRODUCT FLOW LOW CONC FLOW PRETREATMENT HIGH ERI INLET FLOW LOW CHEMICAL HIGH CONDUCTIVITY


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RO Display Screens Main screen

The screen is displayed at power up and contains the overall status of the system. Also this screen is used to select the following screens.

RO Setting I screen

This screen allows changing RO settings: Preflush time (0-180 SEC) Postflush time (0-300 SEC) HPP Postflush time (0-300 SEC) Flush Valve (0-60 SEC) Auto Postflush (0-72 HRS)

RO Settings II screen

This screen allows chaning RO settings: RO Pump Speed (0-100%) Booster Pump Speed (0-100%) HP ERI Different Pressure


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Alarm Settings I screen

This screen allows changing alarm settings: Low Pressure delay (0-15 SEC) High Pressure delay (0-10 SEC) High Permeate Conductivity delay (0-600 SEC) Flow Delay (0-300 SEC)

Alarm Settings II screen

This screen allows changing alarm settings: High Product Flow Set Point Low Concentrate Flow Set Point ERI Different Pressure High Pressure Delay (0-300 SEC)


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Totals screen

This screen shows the current and total flow of permeate and concentrate as well as the flow of ERI High Pressure Inlet.

Alarm History screen

This screen shows a list of alarms with Date and Time.


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System Specifications SW-5.5 M3/H These specifications are based upon computer generated projections. The projections are determined by feed water chemistry, temperature, predicted capacity and anticipated 3-year flows. Supply to Reverse Osmosis Unit (2).............................................................................................. 64GPM RO Product to Service/Storage (1 1/4) .......................................................................................... 24GPM RO Reject to Drain (2) ................................................................................................................... 40GPM Daily Total Permeate Production ........................................................................ 34,560 GPD (132 M3/D)

Expected Feed Water TDS ....................................................................................................................


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Installation RO Unit This skid-mounted unit requires a minimum of installation. All plumbing connections should be made with non-corrosive hose or pipe, preferably schedule 80 PVC or CPVC. See Dwg. G003380-10 and G003380-2 for the physical location of these connections.

1. Place and securely anchor the RO unit in its desired location. Confirm that there is adequate drainage to prevent pooling and stagnation of liquids.

2. If required, load the membranes using the spacers (shims) provided. Refer to the OEM Literature for loading and shimming instructions.

3. Connect a 2 line to the reject connection. This line should be run to drain.

4. Connect a 1 1/4 line to the product connection. This line should be run to a vented tank.

5. Connect a 2 line from the feedwater supply to the flanged feed connection at the RO inlet header.

All drain connections must be provided with an air break or other backflow preventer.

Drain connections must be suitable for the disposal of concentrated saline, acid/alkaline chemicals, and membrane preservatives or disinfectants.

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Electrical Assembly The RO Control Panel, mounted on the RO skid, holds the Operator Display, Instruments, PLC, breakers, and pilot devices (lights and selector switches) required for operation of this system. The RO Power Panel contains the VFD circuitry and soft starts for the RO pump.

Use copper conductors for grounding equal in size to the circuit conductors supplying power to the system.

1. Connect power wiring for 400 VAC, 3 PH, 50 Hz mains power wiring to terminals L1, L2

and L3 at the 80 amp circuit breaker in the RO Power Panel (GND lug) as shown on G003380-3, Sheet 3.

2. Connect the signal wires for the High Level Stop between RO Control Panel terminals 24 and 38 (dry contacts) as shown on G003380-3, Sheet 3.

3. Connect the signal wires for the Low Level Start between RO Control Panel terminals 24 and 39 (dry contacts) as shown on G003380-3, Sheet 3.

4. Connect the signal wires for the Pretreatment Lockout between RO Control Panel terminals 24 and 49 (dry contacts) as shown on G003380-3, Sheet 3.

5. Check all pre-wired connections and terminals. Tighten/secure as necessary.

Do NOT combine power and control wiring in the same conduit.


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Initial Startup Overview

Successful long-term performance of the RO system depends on proper operation and maintenance of the system. This includes operational startups and shutdowns, and particularly the initial plant startup.

Proper startup is essential to prepare the membranes for operating service and to prevent membrane damage due to overfeeding or hydraulic shock. Following the proper startup sequence also helps ensure that system operating parameters conform to design specifications so that system water quality and productivity goals can be achieved.

The initial startup of these RO units should not be attempted without the guidance of someone well versed in water treatment technology and preferably ITT Water Equipment Technologies RO systems in particular. This manual provides a guide for system initialization but cannot possibly cover every conceivable contingency and depends heavily on the experience on the system installer.

Perform a full feed water analysis immediately prior to startup to establish initial feed water contamination levels. Record data for flow rate, SDI, turbidity, temperature, pH, conductivity, and bacteria. This will allow adjustments to the chemical treatment systems to ensure that design and performance specs are achieved.

Recommended for Initial Startup/Commissioning

Shop Hand Tools Safety glasses Thermometer Hand-held pH meter Hand-held conductivity meter Clean 1L plastic bottles/plugs

Sample analysis equipment:

Total hardness Calcium Alkalinity Chloride Sulfate Silica Iron


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Purge air out of the system using the manual air release valves on the cartridge filter housing and using sample valves on the vessel permeate piping and reject line.

Procedure

1. Ensure RO system ready for initial startup: Chemical Injection tanks full, speed and stroke set, pumps primed Multimedia Filtration - backwashed Pre-filters Installed, housing fasteners tight, filter housing drain valves closed All valves external to the RO open

2. Ensure proper lineup of system equipment for startup: System HOA switch Off Feed Pump switch Auto RO Booster Pump Speed switch 0% Flush Pump switch Auto Reject Valve 1/4 Open All sample valves Closed Sample pressure switch set to PX High pressure outlet

3. Install a cleaning hose at the 3-way product cleaning/dump connection to divert product water generated during initial startup to a suitable drain. Allow an air gap or use backflow prevention as required.

4. Perform low pressure flush and leak check as follows:

a. Turn the mains supply disconnect switch to On.

b. Turn the system Start HOA switch to HAND. The preflush sequence will begin. The feed Pump will start and the inlet valve will open.

Air in the high pressure pumps may cause cavitation and loss of performance. Cavitation erosion of the impellers may cause permanent failure.

c. During the flush, check all piping and valves for leaks. Tighten

connections where necessary. (If necessary, turn the system start switch to Off, tighten leaky connections, then repeat from step a as needed.) The feed flow through the PX unit may cause the rotor to rotate and produce a humming noise audible at close proximity to the PX.

d. After the system has been flushed for approximately 3 minutes, turn the system switch to OFF.

e. Repeat steps a through d as needed to ensure a tight system, with all air vented from the pumps and piping.

f. Verify water flow from PX high pressure outlet sample valve.


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5. Set RO booster pump speed to 50%.

6. Turn the System Start Switch to the Hand position. During the preflush cycle, the RO booster pump will start.

7. Set booster pump flow to 38 GPM by adjusting the booster pump speed in the HMI screen Design speed of 50 Hz maximum.

8. Set the ERI inlet flow to 38 GPM by adjusting pressure regulating and reject valves.

9. Allow the system to run for 60 minutes with the permeate water going to drain. At this time confirm proper operation of mechanical and instrument safety devices.

On initial start-up it could take up to 48 hours for the membranes to

reach optimal water quality.

10. Take the first reading of all operating parameters. Draw samples from each pressure vessel and monitor conductivity levels until readings meet design specifications.

11. After 24 to 48 hours of operation, record all plant performance data and draw samples from feed water, ROMAS, reject line, and product line for analysis. Operating parameters and water quality should be within acceptable tolerance.

12. Disconnect the temporary hose used to divert the product water to drain. Switch the 3-way product valve flow from drain to the normal operating position.

13. Once initial startup is completed, submit startup data to ITT Water Equipment Technologies to validate the warranty. Use the initial operating data as a reference for evaluating future system performance.


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Operation

Startup To start the RO system, with the mains supply disconnect switch in the On position, and adequate feedwater supply, place the System switch in the Auto position. After the preflush is complete, the RO system will run based on the water level in the product water storage tank. Running the RO in Hand mode is also possible, but is not recommended. This switch position is recommended for startup, testing, cleaning, or emergency use only.

Shutdown Under normal operation in Auto mode, the RO is designed to automatically shut down when required by product and maintenance requirements, or by an alarm.

Automatic shutdown conditions include Preflush and Postflush cycles. The RO will restart when signal clears. Status will be indicated on the operator display.

To manually shut down an RO unit, turn the System switch to Off. When the RO membrane system is shut down, the postflush cycle will automatically begin.

The percentage of recovery should not exceed the design value shown on the System Specifications page for this system. Operation of this RO system at a rate exceeding the design value will lead to premature fouling of the membrane.

Control Panel

RO operation in Hand mode may result in tank overflow or pump damage if not constantly monitored


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Emergency Stop If required, immediate manual shutdown can be initiated by use of the Emergency Stop button located on the front of the RO Control Panel. When the Emergency Stop button is depressed, all output power is immediately removed from the associated system circuitry without postflush. This button will stay depressed until manually reset by the operator.

Shutdown of the RO unit with the Emergency Stop, the main disconnect switch, or by loss of mains power, prevents postflush of the system and may cause fouling or corrosion. If an emergency shutdown is necessary, restart the system as soon as practical.

The RO train can be stopped for 24 hours without preservation and precautions for microbiological fouling. If feed water for flushing every 24 hours is not available, preservation with chemicals is necessary.

Pre and Post-Flush The pre-flush floods the membranes with feed water and the RO pump suction, removing trapped air in the lines. The feed pump turns on and the inlet valve opens. After the preflush the high pressure pump turns on.

There are two post flush sequences, a feed water flush and product water flush. The feed water post-flush washes reject concentrate from the entire system to prevent mineral deposits, scaling or sludge buildup. The product water flush removes feed water from the system. Post-flush prolongs the life of the membranes, valves, fittings and other components of the system.

The pre and post-flush are factory preset to full scale, but can be changed from the operator display. If the system has not been run or has only run for a very short time, post-flush may be abbreviated or not occur at all depending on the water level in the flush tank.

The amount of system post-flush can be adjusted for either volume or time.


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System Maintenance Overview

A daily operators log, along with RO system maintenance and cleaning schedules, can be found in the rear of this manual. Make copies for the operators and send the completed copies to Water Equipment Technologies Inc. to validate the warranty.

Follow these basic guidelines to minimize unplanned downtime Complete Log Sheets regularly. Add data as needed. Review the data periodically. Look for unusual readings and trends. Be familiar with your equipment. Periodically inspect all components. Use sight, sound, smell and touch to discover unusual conditions.

Component Preventive Maintenance Activity Remarks

Energy Recovery

Check for excessive vibration Check noise level

See OEM literature in Pumps section of manual for complete maintenance instructions.

RO Membranes

Clean the membranes when the membranes feed pressure increases by 5%, salt content in the product water rises noticeably, or the differential pressure increases by 15% from the reference conditions.

See Cleaning section and OEM literature for details.

Pumps

Check mechanical seal for leaks Check Oil Level Check drive belts Check packing leakage Check vibration

Check dampeners pressure

Replace seal if leaking Refill as needed Adjust Tension Adjust or replace Adjust alignment

Adjust or replace

Pre-Filters

Check P. If P drops, open filter housing and inspect cartridges for damage / blockage. If the difference between the filter inlet and outlet pressures (p) reaches 10 PSI, replace the filters.

Replace the cartridges with 5 micron rated filters. Replace the cartridges 4 times per year, regardless of pressure drops, to minimize bacterial growth.

Pressure Vessels

Check the pressure vessel head assemblies for leakage. Replace the pressure vessel head seals if leaking occurs.

Chemical Injection

Check Tank Levels, perform visual inspection Refill tank, check/adjust speed and/or stroke.

Instruments Wipedown, visual inspection, leak check, zero and span, cleaning Maintain data history log for each instrument. Keep comsumables and rec. spares in stock.


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Major Components Pressure Vessels Normally the pressure vessels need no maintenance other than periodic inspection and wiping down with a damp cloth and mild dish soap solution. All connections should be checked for leakage. No leakage should be tolerated due to the high salt content of the reject (condensate) solution.

Refer to the OEM literature for proper maintenance, operating limits, and membrane installation procedures.

Pumps Follow the recommended interval for the duty cycle of your specific RO unit. Lubricate pumps and motors with manufacturer recommended lubricants for longest life. Environmental and operational conditions will contribute to the minimum required lubrication intervals.

Refer to the OEM Literature included with this manual for details of the proper maintenance and operating procedures of pumps and motors on your specific unit.

Pressure Exchanger & Booster Pump If the inlet and outlet flows are measured and balanced properly, the seawater is filtered to remove particles larger than 5 microns, and the PX unit is properly flushed after every shut down, the PX device should operate maintenance and trouble free for many years. The PX unit needs no scheduled periodic maintenance.

Booster Pump motor should be checked daily for temperature and noise. Motor bearings must be lubricated a minimum of every three months. The mechanical seal will require replacement approximately every 12-18 months. Refer to the Pressure Booster OEM Literature included with this manual for details.

5 Micron Pre-filter When the pressure difference between the filter inlet and outlet reaches 10 PSID, replace the filter cartridges. Differential pressure across filters increases with time. When the differential pressure drops, open the filter housing and inspect the cartridges for damage. Replace the cartridges (4) four times per year, regardless of pressure drops, to minimize bacterial growth.

Extreme care must be taken not to allow debris to enter the RO feed. Adequate pre-filtration is recommended to avoid damage to the RO membrane elements.


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Reverse Osmosis Membranes Mineral scale, biological matter, colloidal particles and organic constituents can cause membrane fouling during normal operations. Build-up on the membranes causes loss in water output, salt rejection, or both. Clean the membranes when the normalized water output rate drops by 10%, salt content in the product water rises noticeably, or the differential pressure increases by 15% from the reference conditions. (Reference conditions refer to the flow rate and differential pressures established during the first 24 to 48 hours of operation.)

Water output drops as feed water temperatures decrease. Malfunction in the pre-treatment, the pressure control or pump can cause a drop in the feed water pressure or flow, the product water output or increase in salt passage. Consider these situations when problems are observed. Membranes may not require cleaning. Refer to the Cleaning RO Membranes section of this manual for details.

Chemical Injection The chemical injection pumps used for pre and post-treatment system are essentially maintenance-free. See the OEM literature and maintenance schedule log sheet for details. At least once a year, check injection points for leakage (pressures may exceed 100 PSI on the fittings). Depending on usage, pump membranes may require replacement at annual intervals.

Instruments and Sensors

No instrument or sensor lasts forever and any wide variations in a reading over a short interval should be investigated. Connections should be checked and the sensor reading tested against a sample taken from an appropriate system sample port. Calibration charts for each instrument should be maintained and each unit tested with fresh standard solutions immediately prior to use. Detailed maintenance and operating procedures are located in the OEM literature included with this manual.

Operator Log

A daily operator log, along with RO system maintenance and cleaning schedules, can be found in the Appendix of this manual. Make copies for the operators and send the completed copies to ITT WET to validate the warranty.


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Cleaning RO Membranes Overview

In normal operation, the membranes in the RO system pressure vessel(s) become fouled by mineral scale, biological matter, colloidal particles and insoluble organic constituents. Deposit build up on the membrane surfaces can cause loss of water output, loss of salt rejection, or both.

Membrane elements should be cleaned whenever the normalized water output rate drops by 10%, or the differential pressure (P) increases by 15% from the initial startup reference conditions. (The need for cleaning more than once per month may indicate that pre-treatment is inadequate.)

Acid and alkaline cleaners are the standard cleaning chemicals. Use acid cleaners to remove inorganic precipitates including iron, and alkaline cleaners to remove organic fouling including biological matter. Use reverse osmosis permeate water for mixing cleaning solutions whenever available. If permeate water is not available, use only clean, chlorine-free water for cleaning. Rinse the RO unit thoroughly of one chemical before introducing another.

When working with chemicals, follow the accepted safety practices. Water Equipment Technologies supplied chemicals are generally mixed with 1 pound of powdered cleaner to each 15 US gallons of clean water. For severe fouling, this concentration can be increased to as much as 1 pound per 10 US gallons of water, but this should be avoided as harsh cleaning can reduce the useful life of the membranes.

RO membranes should be cleaned whenever:

Normalized water output rate drops by 10%, Salt content in the water rises noticeably (10%) Differential pressure (P) increases by 15% from the flow rate and P established at

initial startup. Failure to observe this cleaning schedule will cause premature fouling and reduced service life from the membranes.


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The pH levels for acid and alkaline cleaning depend on water temperature. It is NOT recommended to use a cleaning solution temperature below 15 C because of the very slow chemical kinetics at low temperatures. When difficult organic fouling problems exist, alkaline cleaning procedures will be more effective when performed at elevated temperatures. Solutions maintained at 45 - 50 degrees C at a maximum pH of 10, 35 degrees C at a maximum pH of 11, or 30 degrees C at a maximum pH of 12 are recommended.

Several conditions can cause a reduction in the water quality and/or water production. The following items should be checked before considering cleaning.

1. Temperature change This RO unit is designed for feed water at 25 degrees C. Lower water temperature will result in LESS water passing through the membrane. Higher water temperature will result in MORE water passing through the membrane. As a rule, at a given pressure and TDS level, for each one degree change in water temperature the change in water production is approximately 2%. Thus, if the water temperature is 20 degrees C, the amount of water produced will be 10% less than at 25 degrees C.

2. TDS level increase As the TDS (Total Dissolved Solids) level climbs, the amount of water passing through the membrane decreases. If the TDS level has climbed since the time of installation the unit will produce less water. Check the TDS level of the feed water and compare it with the TDS level at the time of installation. If the TDS levels have climbed, the rejection rate will have to be increased to reduce the TDS level build-up within the membrane. Membranes lose efficiency with age and small changes are to be expected over time.

3. Pre-filters plugged A dirty pre-filter can reduce the amount of water and the pressure going to the RO unit. If a 5 micron filter cartridge appears dirty, it should be cleaned or replaced. On extremely dirty water, a larger pre-filter may be needed. When cleaning the pre-filter, check its condition. If signs of wear appear, replace it immediately.

4. Change in flow rates or water pressure change Check the product and reject flow rates to determine any change from normal conditions. Adjust the flows and pressures if necessary to maintain the proper settings.


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Overview

Operator must monitor the tank level at all the time during the cleaning process.

Step 1 Mix the Cleaning Chemicals a. Fill the cleaning tank with product water. If permeate water is not available, use only clean,

chlorine-free water for cleaning.

b. Add the appropriate amounts of chemical into the tank. Refer to the labels on the chemical containers for instructions.

c. Mix the solution, checking the pH, until all chemicals are dissolved. Adjust mixture to desired temperature.

Step 2 Low Flow Pumping

a. Remove the plug/cap and connect a hose between the Feed Cleaning valve and the Feed Cleaning connection just upstream of the membrane assemblies.

b. Remove the plug/cap and connect a line between the Reject Cleaning connection and the return connection on the cleaning tank.

c. Connect a hose between the product valve and the product return cleaning connection on the cleaning tank to capture any product water produced during membrane cleaning.

d. Open the Flush/Clean valve halfway. Start the Flush pump. Pump the cleaning solution through the membrane assemblies at a low flow and low pressure. Use only enough pressure to compensate for the pressure drop from feed to concentrate but no permeate is produced (adjust hand valve as necessary).

e. Verify the flow at the cleaning tank and observe the color of the returning solution. (Color may indicate the type of membrane fouling). Check the pH level and add more chemicals to adjust the pH to its original value. Circulate the solution for 30-45 minutes.

Step 3 Soaking

After 30-45 minutes, shut down the cleaning pump and allow the membranes to soak. Normally a (1) one hour soak period is adequate. For extreme fouling, an extended soak period is beneficial. Soak the membranes overnight for 10 - 15 hours.

Acid soak is not recommended. Removal of mineral scales neutralizes the acid and causes the pH to rise. An increase of only 0.5 pH can cause scale to redeposit on the membranes.


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Step 4 High Flow Pumping

Open the Flush/Clean valve to 100% open. Adjust valve as required to circulate the cleaning solution through the membrane assemblies at a high flow rate. Circulate the cleaning solution for 30 minutes at high flow.

Step 5 Flushing

a. Shut down the Flush/Clean pump. Disconnect the feed and reject cleaning lines from the RO unit and replace the plugs/caps. Keep the product line connected to the RO unit but direct the other end to drain.

b. Turn the System Start HOA switch to Hand. The automatic Inlet valve will open and the RO

unit will start. Dump the product water to drain for a minimum of 10 minutes.

Send all product water to drain for at least 10 minutes after cleaning RO membranes.

c. Turn the System Start HOA switch Off. Remove the temporary product-to-drain hose and replace the original piping. Inspect the pre-filter cartridges on the cleaning system and replace if necessary. Clean residual chemical from hoses and cleaning system.

d. Turn the System Start switch to Auto to resume normal RO production.

Step 6 Return to Service

After the system is up and running, the flows, pressures and conductivity should be back to original specifications or close to it. If not, but substantial improvement was obtained, then repeat the cleaning with new solutions of the same type.

If no significant improvement was obtained, then the cleaning chemicals/solution should be changed and the cleaning performed again. If severe fouling has occurred, then the cleaning of individual pressure vessels at a very high recirculation flow rate might be required. (Check with the W.E.T. Service Dept. prior to cleaning individual RO vessels.)

Test concentrate and permeate for traces of cleaning or disinfection chemicals before sending water to the service connection or product storage.


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Disinfection Overview If the RO unit has been infected by bacteria or mold, disinfection must be carried out after the cleaning. The procedure is the same as for cleaning, except that the high flow pumping step can be skipped.

Formaldehyde can be used as a disinfectant with 0.5 to 3.0% concentrations. Care should be taken in handling this chemical and in flushing the system after use.

Hydrogen peroxide or hydrogen peroxide/peracetic acid solutions can be used at concentrations up to 0.2%. The biocidal efficacy of peracetic acid is much higher than that of hydrogen peroxide, but as most peracetic acid solutions also contain hydrogen peroxide, care must be exercised not to exceed the 0.2% concentration as a sum of both compounds. Continuous exposure at this concentration may eventually damage the membrane. Instead, periodic use is recommended.

When hydrogen peroxide is applied, the pH of the solution must be lower than 4. A pH of 3 is recommended. This will ensure optimal biocidal results and longer membrane lifetime. If no acid is added to the hydrogen peroxide solution, the chemical attack on the membrane will be much faster. When a mixture with peracetic acid is used, pH adjustment is usually not required.

If an alkaline cleaning has preceded disinfection, the alkalinity has to be carefully rinsed out also from the permeate side (check pH) before peroxide/ peracetic acid is applied. Otherwise the membrane might become oxidized.

Two other factors greatly influence the rate of hydrogen peroxide attack on the membrane, temperature and iron. The disinfecting solution must not exceed 25OC. Iron or other transition metals must not be present, because they catalyze membrane degradation in the presence of hydrogen peroxide solutions.

The following procedure is recommended for disinfection with hydrogen peroxide solutions:

1. Any type of deposit on the membrane or other parts of the system should be removed with an alkaline cleaner before disinfecting. Removal of these deposits, which harbor microorganisms, will maximize the degree of disinfection. After alkaline cleaning, flush the system with RO permeate.

2. Clean the RO system with acid to remove iron from the membrane. Flush with RO permeate.

3. Circulate a solution of 0.2% hydrogen peroxide (preferably containing peracetic acid) diluted with RO permeate and pH adjusted to 3-4 with HCl at a temperature below 25OC for 20 minutes.

4. Allow the elements to soak in the disinfecting solution for 2 hours.

5. Flush out the disinfecting solution. Rinse the system.

6. Replace the pre-filter cartridges.


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Preservation Overview

When the system is shut down for extended periods of time (longer than 48 hours), the membranes must be preserved. Preservation is performed using the cleaning system equipment provided for RO membranes.

1. If the system has been in operation, the membranes must be cleaned and disinfected before

preserving. After cleaning, preservation should follow within the next 10 hours.

2. Connect the hoses per the cleaning instructions provided in this manual.

3. Mix a solution of 1 to 1.5% of sodium metabisulfite (SMBS) in the cleaning system tank. Using the cleaning system, start the cleaning pump to circulate the SMBS throughout the membranes for ten minutes. After circulating, disconnect hoses and quickly reconnect all plumbing to minimize any air from entering the pressure vessels. Contact with oxygen will oxidize the SMBS.

4. Change the preserving solution once a month on systems that have been operated in the field. Systems that have been preserved at the factory can go three months before re-preserving is required. Cleaning is not required as long as the system has not been operated.

Preserving Individual Membranes Any membrane that has been used and removed from the pressure vessel for storage or shipping must be preserved. Soak the membranes in an aqueous solution, 20% (by weight) glycerin or propylene glycol and 1% (by weight) sodium bisulfite. Glycerin or propylene glycol can be omitted when freezing temperatures do not exist. Soak the membranes for one hour in the solution, allow dripping out, and sealing it into an oxygen barrier plastic bag.

See the membrane OEM literature included with this manual for more information about RO membrane preservation.


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Troubleshooting This is a listing of some common problems, their causes, and the appropriate remedy. For conditions other than those listed here, contact your sales representative for guidance.

Problem Probable Cause Remedy

Flush fill valve open Wait for the high limit sensor in the tank to indicate a full tank. Check sensor operation and wiring if valve fails to close.

Water temperature is lower than normal. Production drops 2% for every degree below 77 degrees F.

Control the water temperature to stay within RO unit design limits.

Low supply water pressure to the RO unit. Check the 5-micron pre-filter, clean or replace. Check the supply pressure to the 5-micron pre-filter. The RO membranes are fouled. Clean the RO membranes.

Low RO pump pressure. Increase the RO pump pressure by adjusting the pump throttle, and reject valves.

Product pressure is increasing. Check the product piping and the check valve for any blockages.

Not making enough water

Feedwater TDS level is too high. This is a normal occurrence and cannot be adjusted. The higher the TDS level of the feedwater the lower the amount of product water will be produced.

1. Turbo bypass valve closed too far. Open the turbo bypass valve and set to operating specifications.

2. Water temperature has increased.

Control the water temperature to stay within the RO unit design limits. The higher the water temperature the more water will pass through the membrane element; the lower the water temperature the less water will pass through the membrane element.

Making too much water

3. VFD speed too high. Lower VFD speed

O-ring by-pass in the reverse osmosis membrane vessel

Remove the membrane element from the housing and inspect the o-rings. Be sure that the o-rings are seated properly. If this does not restore performance, replace the membrane element.

Turn disconnect switch to Off position and release pressure before attempting to disassemble pressure vessel components.

Chlorine damage has occurred in the membrane element. Replace the membrane element.

The reverse osmosis membrane is fouled. Clean the membrane element(s). Replace them if cleaning does not restore performance.

The feedwater TDS has increased since the time of installation.

This is a normal occurrence and cannot be adjusted. The higher the TDS level of the feedwater the higher the TDS level will be in the product water.

Product water conductivity too high

High or Low pH level in the feedwater. Control the pH level to stay within the RO unit design limits. If the pH level is out of range, contact the factory.


- 32 -

This is a listing of some common problems, their causes, and the appropriate remedy. For conditions other than those listed here, contact your sales representative for guidance.

Problem Probable Cause Remedy

Recovery ratio is too high. Bring the recovery ratio down to RO design limits by adjusting the pump throttle, and reject valves. High conductivity (contd) TDS indicator or probe is not functioning properly. Inspect and service the TDS instrument if necessary.

Check the 5 micron pre-filter, clean or replace. Low supply water pressure to the RO unit. "LOW PRESSURE" light on. Check the feedwater supply pressure to the 5 micron

pre-filter Check feedwater supply Check chemical injection pumps High pH or conductivity Check pH/ORP meter and sensors Adjust the pump throttle and reject valves. Check for product line blockages "HIGH PRESSURE" light on. Check feedwater pressure

RO pump will not stay on

Instrumentation is not reading correctly. Calibrate or replace the defective instrument. Reject valve is open too far. Adjust the pump throttle, and reject valves Flush/Clean tank not yet full Wait for tank to fill Blockage in the product lines. Check the product water line for blockages.

RO pump runs but no product water is being delivered to service

Reject flush pneumatic valve is not closed. Check for flow through the valve and replace if defective.


- 33 -

Permeate Flow

Salt Passage

P Direct Cause Indirect Cause Corrective Measure

Oxidation Damage Free Chlorine, Ozone, KmnO4 Replace Element Membrane Leak Permeate Back pressure: Abrasion

Replace Element Improve Pre-Filtration

O-Ring Leak Improper Installation Replace O-Ring Leaking Product Tube Damaged during Element Loading Replace Element Scaling Insufficient Scale Control Cleaning; Scale control Colloidal Fouling Insufficient Pre-treatment Cleaning; Improve Pre-treatment Biofouling Contaminated Raw Water Insufficient Pre-treatment

Cleaning, Disinfection Improve Pre-treatment

Organic Fouling Oil; Cationic Polyelectrolytes Cleaning, Improve Pre-treatment Compaction Water Hammer Replace element Add Elements

Increasing Main Symptom Decreasing Not Changing

RO Process Corrective Matrix

Legend

Bill of Material (Major Component)SW-5.5M3/H G003380

BEQUIAPart Number Description Qty ea

07-MSCONT20 CONTAINER 20' USED 107-PM15-1014 PUMP, DANFOSS,25GPM,APP7.2,20HP,400/3/50 107-PM02-1022 PUMP,GOULDS,15ESV,3STG,3HP,415/50/3 VIC 107-PM15-1013 PUMP,ERI,HP-8503,5HP/380-400/50,F2 BOX 107-VL24VCM10112VI Valve check 1.5" SS vic Danfoss non-return poppet 107-VL24VCM10112VT Valve check 1.5" SS vic Danfoss non-return 107-PM16HRM10-26 Hose Danfoss 1-1/2" hi pressure 26" long 107-EQ08PX-45S Pressure exchanger PX-45S 107-VS02-1007 VESSEL PRES,CODELINE 80S120-4,2" POR. FT 207-MB-SWC5MAX MEMBRANE HYDRANAUTICS S/W 8 MAX 807-FH-150235 Fltr hsg 1-1/2" #20 big blue w/pr 307-TK05T1002 Tank storage poly 31x55 165 gal 107-PL12181510150 Hose water suction/discharge pvc 1-1/2 107-MS223224-40 Gauge sample drain panel 11GA 316SS 107-TK02-0001 TANK,FRP,WATERCO,28X53,4" NECK 307-VL24-0001 VALVE,WATERCO,5WAY,1-1/2" UNION CONN 307-MSAC24000,220/50 Air conditioner, split 24,000 btu 220/50 107-MS2WUR7 Wall mount bkt for AC 7A0R0/7A0R1 107-VL02181601020 Valve ball PVC T/U 2" Asahi 107-EL012085020-24 Actuator elect 24VDC 2" Asahi series 94BV 107-EL012126001/94 Actuator limit switch 107-VL02181601010 Valve ball PVC T/U 1" Asahi 107-EL012085010-24 Actuator elect 24VDC 1" Asahi series 94BV 107-VL04181043012 Valve ball 3-way pvc 1-1/4" Asahi soc 107-VL043065012 Ball multi double L pvc 1-1/4" 107-VL02181601015 VALVE BALL PVC T/U 1-1/2"ASAHI TYPE 21 107-VL02181601020 Valve ball PVC T/U 2" Asahi 207-VL0222R89999ATSE-E10 VALVE BALL 1/2" 316 SVF 3PC THD W/24VDC 107-VL10181260015 Valve globe pvc 1-1/2" Asahi 107-VL2118192304011 VALVE Y-CHECK PVC 2 EPDHAYWARD 107-VL2118192304009 VALVE Y-CHECK PVC 1-1/4" EPD HAYWARD 107-VL021071015 Valve ball pvc compact 1-1/2" thd 107-VL02PVC2264FMB 1/4" pvc sample valve 607-VL1679E7051541 Valve safety relief 1/2" ss 107-VL02SS43ZF2 Valve ball 5-way 1/8" 207-VL134FPR4VTSS VALVE BALL SS 1/4" FPT XFPT 207-VL1418PRH150B Valve pressure reg 1-1/2" PVC 107-IN028705THA015S6W1N0G1B3 MAGNETIC FLOWMETER FLOWTUBE 1.5" CLASS 600 107-IN028732EST1A1N0 TRANSMTR MAG FLOW INTRICAL MOUNT N/DISPL 107-SG0101.50300#NA Gasket flg-ring 300#/600# 1-1/2" non asbestos 207-EL25PH90 Switch Pres 3-90 PSI Poly 107-EL25132P46C3 Switch Pres Neo-Dyn 132P-1500 107-EL25PF2658 Switch Level 2DI / 1AI 100 InH2O IFM 107-EL25U30033 Switch Level Adapter G1 3/4" NPT IFM 107-IN08E18113 Cable 4-wire 90 deg FEMMICRO DC conn 10M 107-PL03180261136007 Bulkhead ftg PVC 3/4 SXT 107-IN013-8850-2P Transmitter cond Signet 8850 pnl 107-IN013-2821-1 Sensor cond 1 const Signet 107-IN0232536-PO Sensor flow Signet pvc 207-IN08PV8S020 SENSOR SADDLE SIGNET 2 107-IN08PV8T012F Sensor tee Signet 1-1/4" pvc 107-IN27T-342-101500 TRANSMTR PRES KPSI0-1500 PSI TITANIUM 2

1 of 2

Bill of Material (Major Component)SW-5.5M3/H G003380

BEQUIAPart Number Description Qty ea

07-GA05LFS4121000M Gauge pres Span 1000#/kpa hast mini seal 107-GA05LFS412100M-H Gauge pres Span 100#/kpa hast mini seal 170-200-148-WET Enclosure Alum 72x36x16 N4,AL,PLAIN,WET 180-000-675 Heat-Exchanger Kooltronic KXHE122A 115v,1.1a,60hz 107-EL259421LF1 DISCONNECT HANDLEOPERATING MECH FAL SQD 4X 107-EL04FAL34080 BREAKER 3-POLE 80A 480V SQD 107-EL04MG24546D BREAKER 3 POLE 63A 480V MG 107-EL04MG24541D BREAKER 3 POLE 20A 480V MG 107-EL289070T750D33 TRANSFORMER 750VA 415/380:120 107-EL04MG24432C BREAKER CIRCUIT 1-POLE 10A MG 107-EL30ATV61HD15N4 INVERTER/VFD 15KW ATV61 SQD 107-EL30ATV61HU40N4 INVERTER/VFD 4KW ATV61 SQD 107-EL08LC1D25BL Contactor 3PH 25A 24VDC Tele 207-EL23GV2-ME14 STARTER MANUAL 6-10 TELE 107-EL23GV2-M08 STARTER MANUAL 2.5 - 4A TELE 107-EL23GV-AD1010 STARTER MANUAL FAULT/AUX TELE 107-IN041762-L40BWAR PLC processor AB 1200 24DC/16R 2 PORT 107-IN041762-IF2OF2 PLC MODULE ANALOG COMB 2ln/2out AB 1200 207-EL30XBTGT1100 OPRTR INTERFACE 3.8 AMBER/RED MAGELIS TELE 107-IN04CBL1200-XBTGT1100 Cable AB PLC - Magelis 107-EL19-001 POWER SUPPLY 120/240VAC 24VDC/240W/10 AB 107-EL19ML30100 POWER SUPPLY 100/240 VAC24VDC / 30W PULS 181-001-033 HOUR METER, W/GASKET,60HZ, 10-80 VDC 107-EL700HLT12Z24 RELAY TERMINAL BLOCK 24VDC 10A 2POLE AB 707-EL25800FPSM32PX20 SWITCH 3 POS MAINT 2NO W/LATCH AB 307-EL25800FPF2PX10 SWITCH PUSH BUTTON BLK 1NO W/ LATCH AB 107-EL25800FPMT34PX01 SWITCH 22MM PUSH-TWIST EMG 30MM W/LATCH/1NC AB 107-EL09800FX10 CONTACT BLOCK NO AB800F-X10 107-EL041761-NET-ENI PLC MODULE RS232/ETHERNET INTERFACE AB 107-IN041761CBL-HM02 CABLE RS 232 8 PINDIN/8PINDIN 173-001-207 BLOCK,DISTRIB,1P,150AMP,UDJ125A,ERIFLEX 307-EL740010S67F TRANSFORMER 10KVA 107-EL04MG17472D BREAKER 3-POLE 30A D MG SQD 107-EL04MG17416C BREAKER CIRCUIT 1-POLE 15A MG 207-IN041762-MM1 PLC MEMORY MODULE AB 1200 107-FC-021-15 Fltr cart pltd 5 micron 607-FHP-144229 Cartridge coupler 4" 307-PM15-1016 PUMP,AMPCO,NB,ZC2,7.5HP,380/3/50 107-TK02-0001 TANK,FRP,WATERCO,28X53,4" NECK 307-VL24-0001 VALVE,WATERCO,5WAY,1-1/2" UNION CONN 307-FM05A8073 GRAVEL 1/4X1/8 100# BAG 1 CU FT 407-FM06A8025-01 GARNET #8 50# BAG .36FT3 607-FM11A8071 SAND 45-55MM 100# BAG 1 CU FT 2007-FM02A8029 ANTHRACITE #1 FLTR MED 50# BAG 1307-PM04-1001 PUMP,CHEM,A+PULSA,6GPD,220V,PVC,5FV 107-PM04-1006 PUMP,CHEM,A+PULSA,12GPD,220V,PVC,DEGAS 107-PM04-1007 PUMP,CHEM,A+PULSA,12GPD,220V,PVDF 107-TK01621832BN7000 TANK CHEMICAL 35 GAL W/CLOSURE 307-TK05-1011 TANK,POLY,A COV,120GAL,POLY,24X24X48RECT 1

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ITTWATER EQUIPMENT TECHNOLOGIES

JOB: Bequia Project G00338011/2/2010

FEED, K GALS/D 492.48RO PERMEATE, KGALS / D 345.6BLEND FLOW, KGALS / D 0PERM + BLEND FLOW, KGALS / D 345.6

PRE TREATMENT CHEMICALSTYPE SODIUM HYPO., 5.4% SODIUM HYPO., 10% SODIUM HYPO., 15%DOSE - MG/L OF 100% 0 0 0LB. 100% / K GAL FEED 0 0 0AVAIL. CL2, LB. / GAL. 0.45 0.83 1.25GAL CL2 / K GAL FEED 0 0 0GAL / DAY CHEMICAL 0 0 0GAL/YEAR, 24 HOUR OPERATION 0 0

POWDER AQUEOUSTYPE CALCIUM HYPO. 70% SOD. BISULFITE, 100% CALCIUM HYPO. 5% SOD. BISULFITE, 15%DOSE - MG / L OF 100% 0 6 0 3LB. OF 100%/ K GAL FEED 0 0.05 0 0.025AVAIL. CHEM. BY WEIGHT, % / 100 0.7 1 0.7 1LB. CHEM. / K GAL. FEED 0 0.05 0 0.025LB. CHEM. / DAY 0 24.624 0 12.312LB. CHEM. / GAL. 0.4173 1.252GAL / DAY OFSOLUTION 0 9.834

TYPE SULFURIC, 66 BAUME SULFURIC HCL, 18 BAUME HCL, 20 BAUME% CONCENTRATION/100 0.9319 0.98 0.2792 0.3145DOSE - MG/L OF 100% 0 0 0 0LB. OF 100% / K GAL FEED 0 0 0 0LB. OF 100% / DAY 0 0 0 0 LB. OF ACID / GAL ACID SOLUTION 14.19 15.02 2.661 3.043GAL / DAY ACID SOLUTION 0 0 0 0

TYPE ANTISCALANT COAGULANTDOSE - MG / L AS SUCH 3 0LB. OF SOLUTION / K GAL FEED 0.025 0LB. OF SOLUTION / DAY 12.312 0LB. OF SOLUTION / GAL 10 10GAL / DAY OF SOLUTION 1.231 0GAL/YEAR, 24 HOUR OPERATION 443.16 0

POST TREATMENT CHEMICALSTYPE SODIUM HYPO., 5.4% SODIUM HYPO., 10% SODIUM HYPO., 15%DOSE - MG/L OF 100% 0 2 0LB. 100% / K GAL PRODUCT 0 0.0167 0AVAIL. CL2, LB. / GAL. 0.45 0.83 1.25GAL CL2 / K GAL PRODUCT 0 0.0201 0GAL / DAY CHEMICAL 0 6.947 0GAL/YEAR, 24 HOUR OPERATION 0 0

POWDER AQUEOUSTYPE CALCIUM HYPO. SODA ASH CALCIUM HYPO. 5% SODA ASH 12.5%DOSE - MG / L OF 100% 0 0 0 0LB. OF 100%/ K GAL PRODUCT 0 0 0 0AVAIL. CHEM. BY WEIGHT, % / 100 0.7 0.9916 0.7 0.9916LB. CHEM. / K GAL. PRODUCT 0 0 0 0LB. CHEM. / DAY 0 0 0 0LB. CHEM. / GAL. 0.4173 1.0432GAL / DAY OFSOLUTION 0 0

TYPE HYDRATED LIME HYDRATED LIME 15%DOSE - MG / L OF 100% 0 0LB. OF 100%/ K GAL PRODUCT 0 0AVAIL. CHEM. BY WEIGHT, % / 100 0.93 0.93LB. CHEM. / K GAL. PRODUCT 0 0LB. CHEM. / DAY 0 0LB. CHEM. / GAL. 1.2518GAL / DAY OF SOLUTION 0

TYPE CAUSTIC, 49.9 BAUME CORROSION INHIBITOR% CONCENTRATION/100 66 100DOSE - MG/L OF 100% 15 1.5LB. OF 100% / K GAL PRODUCT 0.125 0.0125LB. OF 100% / DAY 43.2 4.32 LB. OF CHEM / GAL SOLUTION 6.634 10GAL / DAY CAUSTIC SOLUTION 6.512 0.432GAL/YEAR, 24 HOUR OPERATION 2344.32 155.52

NOTE: DOSAGES SHOWN ARE ESTIMATIONS, ACTUAL USAGE DEPENDS UPON SITE SPECIFIC WATER CHEMISTRY

Page 1 chemical injection 3380

10661 Newkirk Street, Dallas, TX 75220 USA Phone: 1-800-786-7480 Fax: 214-574-7867

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Limited Warranty Reverse Osmosis Systems and Membranes ITT warrants each new reverse osmosis unit/system to be free from defects in materials and workmanship under normal use, if installed and operated under ITT design specifications, under the conditions listed below. Hardware Limited Warranty For a period of twelve months from initial use, or fifteen months from the date the equipment is ready to ship from our factory, whichever period expires first, ITT will repair or replace, at its option, any part of the "hardware" which we find to be defective in operation because of faulty materials or workmanship. "Hardware" does not include disposable filter cartridges, or other consumable materials. Reverse Osmosis (RO) Membrane Pro-rated Limited Warranty On ES and MS Series systems with 4 membranes: For a period of three years from the date of shipment from ITT, ITT will replace any thin film composite reverse osmosis (RO) membrane found to be defective due to faulty materials or workmanship on the following basis: A credit of 1/36 of the current replacement price for each unused month remaining under the 36 month warranty period will be provided against, and will reduce the cost of the replacement RO membrane, provided the system is installed and operated according to ITT specifications and instructions. On GRO Series systems: The reverse osmosis membranes are covered for 1 year if found to be defective due to faulty materials or workmanship provided the system is installed and operated according to ITT specifications and instructions.

On all reverse osmosis systems utilizing 8 membranes: The membrane manufacturers warranty applies. What is covered: Any defect in the RO membrane that reduces the quality or quantity of water produced due to a defect in materials or workmanship. What is not covered: (a) An RO membrane is subject to

damage by oxidants such as chlorine, ozone or hydrogen peroxide. Chlorine is normally found in municipal water supplies and must be removed by the units pre-filter. It is the customers responsibility to change the pre-filter as necessary to prevent damage from oxidants. Any RO membrane found upon examination to be damaged by oxidants is not covered by the warranty.

(b) RO membranes can be subject to

fouling from colloids, organics or inorganics which would reduce the quantity and quality of the water produced. Any fouling of the RO membrane is not covered by any warranty. Adequate pretreatment, and/or cleaning for the system is the responsibility of the customer.

(c) Any use of unapproved cleaning

compounds that damage the RO membrane voids the membrane warranty. ITT will sell, or provide the names of approved RO membrane cleaning and preservative compounds.

Conditions of Warranty 1. Damage to any part of the RO unit

because of misuse, misapplication, neglect, alteration, accident, physical damage, installation or

operation contrary to our written specifications or instructions, or damage caused by hot water, freezing, flood, fire or Act of God is not covered by this warranty.

2. Any accessory equipment used in

connection with any ITT RO system, which was not sold by ITT in connection with the installation of the RO system, is not covered under any specific or implied warranty. Any such accessory equipment used in connection with any ITT RO system which adversely affects the operation of the system will void ITT warranty.

3. The purchaser of an ITT RO system

must provide the following information to ITT:

(a) Residential use RO Systems

Proof of purchase, purchase date and unit serial number.

(b) Municipal, Commercial, or

Industrial use RO Systems Log Sheets, included in the instruction manual that accompanies each RO system, must be completed and sent to ITT within ten days of installation and on a monthly basis thereafter during the membrane warranty period. Failure to provide this information voids the RO membrane warranty.

4. ITT cannot control the

characteristics of your water supply. For this reason, we assume no liability for the determination of the proper equipment to meet your requirements, unless ITT has provided a proposal in writing for the ITT RO equipment or RO


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membranes that states the system or membranes will meet your particular requirements based on the water chemistry at the time of purchase.

5. In no event shall Seller be liable for

any loss, damage, injury or expense resulting from the use or operation of, or from the erosion or corrosion of the goods, or from ordinary wear and tear of the goods, unless otherwise agreed in writing. Parts or products manufactured by others and provided by Seller are warranted only to the extent of the manufacturers original warranty. Seller makes no independent warranty or representation with respect to these products.

6. Purchaser must give written notice

to Seller of any defects in material or workmanship of warranted goods within ten (10) days of the date when any defects are first manifest. Upon such notice, the sole responsibility of seller under this limited warranty shall be to repair or replace, at its option, a defect in the material or workmanship during the warranty period. All field labor required to make such repairs or replacement shall be supplied by the purchaser and at purchasers expense unless otherwise agreed in writing.

7. This limited warranty is void unless

the installation, operation and maintenance of the goods are done in accordance with the Sellers instructions. Further, Sellers warranty is void if Purchaser makes

any repairs to the goods without Sellers prior written authorization.

8. Customers who believe their RO

unit or RO membranes have a defect that may come under the Limited Warranty must also comply with the terms of the Warranty Service Policy which has been provided to the customer along with this Limited Warranty.

9. Freight, Field Labor, Travel and

Living Expenses Freight - Before shipping any part or unit back to ITT, please contact the dealer you purchased your unit from. He must obtain a Return Authorization (RA) Number that you must display prominently on the outside of the carton being returned. Cartons that do not have a RA Number will not be accepted. If you cannot contact the dealer, please call ITT directly and ask for the Service Department in order to obtain a RA Number. Any defective part must be shipped freight prepaid to the ITT factory within 30 days of the issuance of the RA. Replacement parts provided by ITT under the warranty will be sent freight pre-paid by ITT. Field Labor - The cost of labor to repair/replace an RO unit, at the customers location by ITT personnel or authorized service agents is not included in the warranty, unless a service contract has been signed that includes the cost of labor. ITT and the customer shall agree in advance on the labor charges for any repairs at the customers location. Travel & Living Expenses - The cost of travel and living

expenses to get to and from a customers location to repair or replace an RO unit or parts therein, by ITT personnel or authorized service agents, is not included in the warranty. ITT and the customer shall agree in advance on the amount of travel and living expenses for any repairs at the customers location.

10. The foregoing warranty is exclusive

and in lieu of all other expressed or implied warranties, guaranties, agreements, conditions or representations made by any person with respect to the goods covered by this offer, including any implied warranty of merchantability or fitness for a particular purpose which are hereby specifically disclaimed. In no case will seller be liable for any direct, indirect, special, incidental or consequential damages resulting from a breach of warranty or any other cause including, but not limited to, loss of use of the product, loss of time, inconvenience, injury, loss or damage to person or property, commercial loss, loss of profits, liabilities of purchaser to its customers or third persons or other matters not specifically stated, whether based on contract, tort or any other legal theory. It is specifically agreed that any action for breach of warranty or other action against seller under this contract shall be commenced within one (1) year and one (1) day after such cause of action accrued


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Warranty Service Policy In the event an ITT product that is under warranty malfunctions, we ask that you adhere to the below policy to ensure efficient service.

1. If the product was purchased from a local dealer, you should first contact that dealer, since he is aware of the details of your system. If he cannot be contacted, or if the item was purchased directly from ITT, please call us at the number listed below and ask for the Service Department.

2. When calling ITT, be prepared to provide the following information:

(a) The specific problem you are having with the product.

(b) The date, serial number, model and from whom you purchased the product.

3. Depending on the situation,

you may be given a Return Authorization Number and requested to complete and return a Return Authorization Form. Any parts sent back to ITTmust be sent freight pre-paid and identified using the Return Authorization Form and Number. We will not accept any return items without this information.

4. When ITT receives the damaged part, we will determine whether it is covered under warranty. Please be advise that all spare parts provided by ITT will follow the manufacturers warranty

terms. Manufacturer warranty policy for any component purchased will be provided upon request. Please note that in many cases ITT must forward the part to its manufacturer for warranty determination.

Warranty determination can take from one to six weeks, depending on the circumstances.

5. ITT reserves the right to repair or replace any part, at its option, that is determined to be under warranty and is defective due to faulty material or factory workmanship. If a damaged part is repaired or replaced under warranty, it will be returned to the customer freight prepaid within the United States. For international returns, customer is responsible for freight fees. In the event a customer wishes to order a new part prior to warranty determination, the part will be shipped and the customer will be invoiced. Should the original part be under warranty and unable to be repaired, a credit will be issued for the new part previously shipped. Note that the customer is responsible for the cost of any new parts that were sent pending warranty determination if the parts are covered under warranty and repaired for return or found not to be covered by our warranty.

6. RO membranes will be evaluated upon receipt by ITT.

(a) If the membranes have been damaged by chlorine or some other oxidant, they are not covered by the warranty. You will be informed and you are responsible for a $75.00 evaluation fee.

(b) If the membranes are not damaged, but are fouled by organics or mineral scale, you will be informed and you are responsible for a $75.00 evaluation fee. You will also be advised of the cost and feasibility of cleaning the membranes.

(c) If the membranes are defective and covered by the warranty, the procedures in paragraph 5 will be followed, except that the credit for the RO membrane will be determined on a 36 month pro-rated basis as provided under the terms of the Limited Warranty.

DAY 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31

WATER QUALITY

HOUR METER

WATER TEMPERATURE (C)

PRODUCT WATER TDS (PPM)

PRESSURES (PSI)

CARTRIDGE PREFILTER IN

CARTRIDGE PREFILTER OUT

CARTRIDGE FILTER PRO PUMP DISCHARGE

RO MEMBRANE FEED

RO REJECT

RO MEMBRANE PFLOWS (GPM)

PRODUCT

REJECT

OPERATORS INITIALS

COMMENTS:

RO DAILY LOG SHEET

COMPANY: TEL: MONTH/YR: OPERATOR'S NAME:

CITY/STATE/COUNTRY: FAX: RO MODEL: SERIAL #:

Protect Your Investment Complete This Log Daily

Validate Your WarrantySend Copies To ITT

RO Cleaning Log Sheet

Date: Stage/Pass CleanedTDS of Permeate Before CleaningFeed Pressure Before CleaningPermeate Flow Before CleaningChemicals Used ConcentrationQty Used Qty of Water Used Temperature of Solution Condition of Cleaning Spool(s) Biological (yes/no) Cleaned Fittings (yes/no)Recirculation time (Low Flow)Color of Solution During Recirculation pH of Solution After Recirculation Adjust pH (yes/no) Soak TimeFlush TimeReplaced Cleaning Spools (yes/no) Open Reject Valve (yes/no) Permeate Flow After CleaningFeed Pressure After CleaningInterstage Pressure After CleaningReject Flow After Cleaning TDS of Permeate After Cleaning

Operator InitialsNotes:

Service Dept.: 1-800-786-7480 ITT Flowtronex 10661 Newkirk Street Dallas, TX 75220

RO Maintenance Schedule

Task Dai

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Detail Range RemedyVisual Pressure Vessels Check for leaks None Tighten Fittings

Pump Oil Level(1) Check for level Add OilPump Seals Check for excessive leakage 1-3 drops Replace SealsPlumbing Check for leaks None Tighten Fittings, Replace SealsAlarm Panel Check for alarm indications None Correct Alarm condition, Press ResetControls/Gauges Check for out-of-range readings None See troubleshooting guide, correct condition

Metrics Inlet Pressure Within required range? 20-60psig Adjust supply pressureInlet Flow Within required range? [ ] Adjust inlet valveMedia Filter D P(1) Less than 10 psig

bequia reverse osmosis water treatment system system description

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