READ THIS MANUALPLEASE KEEP FOR PERMANENT REFERENCE

Revised 2/03

It is imperative that those responsible for the installation of this equipment,as well as operating personnel, read this manual and carefully follow allinstructions and guidelines. EQUIPMENT OPERATORS AND INSTALLERSMUST COMPLY WITH OPERATIONAL SAFETY REQUIREMENTS.

Aquafine Corporation builds the finest quality ultraviolet equipment in theworld. When properly installed and operated, Aquafine ultraviolettreatment units will provide many years of service.

DW Series Installation,Maintenance andOperation ManualPart No. 109-1

This manual covers the preliminary installation, operation and generalmaintenance requirements for Aquafine Ultraviolet Water TreatmentEquipment for the following applications:

• Disinfection

ATTENTION:The information on Page 5 #10 regarding “War-

ranty Information” and page #8 regarding the “Intermit-tent Operation” Section (Note: On the “Intermittent Op-eration” the entire section, does not apply to either unit inthe DW Series). These are misprints and should be disre-garded!

Any questions contact Aquafine Corporation

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Installation and Operational Safety ................ 3

Description of EquipmentDW Series Ultraviolet (UV) Treatment Unit ....... 4

Warranty Information ................................... 4-5

Unit InstallationWhere to Install the Unit ..................................... 6How to Protect Your Unit ................................... 6Operating Pressure ............................................. 6DW Installation ................................................... 6Grounding the Unit .............................................. 7

Intermittent Operating Requirements ................... 8Requirements for Ultrapure Water ...................... 8

Installing the Quartz Sleeves .................... 9-10

Installing the Ultraviolet (UV) Lamps .... 11-12

Powering Up the Ultraviolet (UV) Unit ........ 13

Monitoring DevicesLamps Operational Viewport ............................ 14

Maintenance Requirements ......................... 15Cleaning the Unit .............................................. 15UV Lamp Replacement .................................... 15Quartz Sleeve Cleaning & Replacement ........... 15Ballast Replacement ......................................... 16Measuring Performance ................................... 16

Obtaining Samples ............................................ 17

Sampling Procedures ........................................ 17

Parts List ........................................................ 18

Electrical Diagram, General Outline Drawing,General Assembly Drawing andWarranty Registration Card ...........Back Pocket

Refer to this nameplate decal on yourunit when ordering parts or service.

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safety requirements forUV equipmentThe following safety requirementsdirectly relate to operator safety. Pleasereview with all appropriate personnel toensure continuous compliance.

These safety requirements areMANDATORY.

Failure to carefully follow these require-ments can cause injury to the operatorand damage the UV unit.

1. Release the pressure in the UV treatment chamberbefore attempting to remove the protective coversand sealing items.

2. Disconnect all power to the UV unit beforeservicing. The unit operates on high voltage andshould only be serviced by qualified personnel.

3. Do not look at the lighted blue ultraviolet lamp. Donot operate the ultraviolet lamp outside of the UVtreatment chamber. Exposure can severely burn anddamage eyes and skin.

4. Supply the unit with the correct voltage andfrequency as indicated on the nameplate decal,ensuring the unit is wired in accordance with localelectrical codes.

5. Properly ground the unit. Failure to comply mayresult in severe or fatal electrical shock.

6. Install the unit away from undue vibration that candamage the electrical components and UV lamps.

7. Ensure all water connections (flanges and compres-sion nuts) are tightly sealed before applyingpressure to the UV unit. Do not stand in a directline with the endplate when inspecting for waterleaks; observe from the front or back.

This “Safety Issue” icon marksall items relating to safety issues.Please read and adhere to thesecomments carefully.

DO NOTLOOK ATUV LIGHT

8. Do not allow the unit to overheat by operatingwithout water flow. Normal operating temperaturefor standard UV units is 35° to 100°F (2°-38°C).

9. If the inlet water temperature exceeds 100°F (38°C),contact the factory for assistance.

10. Do not allow the water temperature to drop below35°F (2°C).

11. Do not allow the flow rate to exceed the maximumrated capacity.

12. DO NOT ELECTRICALLY CYCLE THE UVUNIT MORE THAN THREE(3) ON/OFF CYCLES INA 24-HOUR PERIOD.

13. Before start up, flush the UV unit and dischargepiping to rinse out any debris left from installation.

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DW seriesThe model DW is intended for disinfection of domesticdrinking water which meets minimum acceptable waterquality standards. This UV device is not intended forindustrial use or harsh environments.

This unit is not intended for destruction of cysts.Should your water source be from surface waters, thepossibility of cyst contamination is present and youshould install a cyst removal filter which meets orexceeds National Sanitation Foundation (NSF) Standard53.

The water entering the UV unit must meet certain“clarity and minimum contaminant standards” in orderto be acceptable for UV treatment. To the untrained eye,the water must be clear, free of color and visibleparticles. From a technical point-of-view, the water mustbe pretested to insure non-visible contaminants are notpresent which can block the UV light rays and preventproper performance.

Do not install or operate the UV treatment unit until thefollowing minimum contaminant levels in the feed waterare assured:

• Turbidity: Less than 2 NTU

• Suspended solids: Less than 10 mg/L

• Maximum Total Iron: 0.3 mg/L

• Maximum Total Manganese: 0.5 mg/L

• Color: None

• pH: 6.5 - 9.5

Pretreating the water with appropriate filtration and/orother devices may be necessary to bring the waterquality up to acceptable “UV transmission” levels. Onlythen should you install and operate this or any otherpotable UV unit. Failure to provide acceptable waterquality can promote premature and excessive fouling orcoating of the quartz sleeve. This will not only effectperformance, but will also create an unacceptablecleaning and maintenance schedule.

THIS UV DISINFECTION UNIT ISINTENDED TO TREAT DOMESTICDRINKING WATER WHICH HASBEEN TESTED AND PRETREATEDAS REQUIRED TO INSURE THEINLET WATER TO THE UV UNIT

MEETS MINIMUM ACCEPTABLE WATER QUALITYSTANDARDS DESCRIBED ABOVE.

The disinfection unit is comprised of a stainless steelchamber with a water inlet and outlet. A UV lamp islocated in the center of the chamber and is containedwithin a fused quartz sleeve.

As water flows through the chamber, the UV lampproduces UV light rays that pass through the quartzsleeve and into the water, penetrates the outer cellmembrane of microorganisms, passes through the cellbody, reaches the DNA and alters the genetic material.The microorganism is rendered unable to reproduce.

The design of the unit allows the UV lamp to bereplaced without having to break the water seal. Thechamber and electrical components are housed in aprotective metal cabinet.

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5. Failure to avoid excessive stops and starts. Notmore than three (3) on/off cycles per 24 hoursof operation.

6. Operation of visibly damaged equipment.

7. Failure to avoid undue overhead piping stresswhich may result in structural damage to theUV unit.

8. Use of components other than those provided orauthorized by Aquafine.

9. Failure to correct overhead piping connection leaksor compression nut seal leaks which result indamage to the electrical components.

10. Operating the unit without water flow.

To maintain your UV units warranty, please fill out andmail the Warranty Registration Card in the backpocket of this manual and return to Aquafine CustomerService.

The following installation and operating conditionsare considered hazardous or damaging to theequipment and can compromise the ability of theAquafine unit to perform as intended.

ANY OF THE FOLLOWING CONDITIONSMAY VOID THE EQUIPMENT WARRANTY.

1. Failure to connect proper electrical service to unit.

2. Failure to properly ground the unit.

3. Failure to eliminate excessive vibration, pipingmovement, or water hammer.

4. Failure to exercise caution in the handling of thesensitive and delicate components (such aslamps, quartz sleeves, electronic boards, etc.)during installation and/or maintenance proce-dures.

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Aquafine equipment is guaranteed to be free fromdefects in materials and workmanship (excludingultraviolet lamps) for a period of one year from thedate of purchase. Any part suspected of beingdefective should be returned prepaid to AquafineCorporation. If upon our inspection, the part(s)proves to be defective, it will be replaced or repaired(our option) and returned to sender prepaid.

Before returning any part, contact AquafineCorporation for return authorization and shippinginstructions. This guarantee is void if the equipmenthas not been installed and maintained inaccordance with instructions. This guarantee is inlieu of all other warranties, expressed or implied.

To keep your warranty valid and to ensure peakperformance, fill out and return your warrantyregistration card (located in the back pocket ofthis manual) and use only genuine Aquafinereplacement parts.

WARRANTY

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where to install the unitThe UV unit should be installed after all other waterconditioning equipment. Mount the unit to a wall orbraced frame using the mounting tabs. Install a bypasswith unions.

Install the UV treatment unit in a sheltered area withample ventilation. Ambient temperatures surroundingthe unit should be between 35oF (2oC) and 110oF (43oC).Should your requirements differ, contact the factory forassistance.

As an ultraviolet UV treatment unit does not introduceany chemical residue within the water, it is desirable toinstall the unit as close as possible to the point of use inorder to avoid potential recontamination by dischargepipes, fittings, etc. The base of the UV treatment unitshould be mounted on suitable support to avoid unduestrain on the unit or your related pipes and fittings.

The UV unit should be installed after all other waterconditioning equipment and as close to the end point ofuse as possible. For example, it should not be installedin a remote well house; it should be installed at thehouse. If filtration or other water treatment equipment isinstalled, the UV unit must be installed after all suchequipment.

how to protect your unitThe location should be free from undue vibration whichcould be caused by proximity to heavy equipment anderratic or improper pumps. Excessive vibration willdamage internal electrical components and causepremature failure of the UV lamps.

If your piping system is subject to impulse pressureresulting in a “water hammer” condition, a surge tank orother means must be provided to remove this condition,otherwise the extreme momentary pressure may ruptureand fracture the quartz sleeves.

operating pressureStandard units are rated for a maximum operatingpressure of 120 psig (8.3 bar).

A parts check list was included whenthis unit was shipped. Please refer tothis list and note that some parts aresmall and can be easily overlookedwhen discarding packaging.

DW-8 installationAllow 40” (102cm) service access clearance on the inletside and 12” (31cm) on the outlet side clearance on theopposite end of the unit. For the DW-8 DE unit, aminimum of 2 feet clearance is required below thebottom of the unit to operate the drain valve (suppliedby others).

If vertical installation is required due to lack of horizon-tal access space, the inlet water connectionmust be at the bottom.

DW-5 installationAllow 16” (41 cm) service access clearance on bothends of the unit.

If vertical installation is required due to lack of horizon-tal access space, the inlet water connectionmust be at the bottom.

groundingIt is imperative that the unit be properly grounded forsafe and proper operation.

Failure to properly ground the UV unit automaticallyvoids the equipment warranty.

Line voltage to the UV unit must be stable. Performancewill be reduced should incoming line voltage drop morethan 5% from the rated voltage as indicated on the

nameplate decal on the unit.

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special piping requirementsfor users of ultrapure waterUltrapure water users have reported that over time,exposure to ultraviolet light may photochemicallydegrade nonmetallic piping materials, including mostor all fluoro-polymers, resulting in material break-down and/or structural failure. Should your waterapplication and piping material be so classified, werecommend you install “UV light traps” to isolate anysuch susceptible material from direct exposure to theultraviolet light. Install the UV light traps to the inlet/outlet of the UV treatment chamber prior to the connec-tion of any nonmetallic materials. UV light traps protectnonmetallic piping. Should you require additionalassistance, please contact your local Aquafinerepresentative or the factory directly.

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If the location of the UV unitis vacant for 3 or more days,the UV unit should beunplugged to preventoverheating. After plugging

in the UV unit from a cold start, it takesabout 3 minutes for the lamp to warm up to100% UV power.

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Over tightening can break thequartz sleeve or create leaks.

quartz sleeve installationprocedure: single-ended unitsThe quartz sleeves designed for this unit utilize a quartz tubethat is open on one end and closed on the other end. Theclosed end of the tube is inserted into the threaded nipple.

1. Turn off all power to the unit.

2. Wear clean cotton gloves to prevent contamination ofthe quartz sleeves.

3. Carefully remove the quartz sleeve from the factorypackaging. Handle these with care as they are fragile.

4. Visually inspect all quartz sleeves for cracks or otherdamage. Do not install damaged quartz sleeves.

5. Remove the cover from the treatment chamber.

6. Remove the compression nut.

7. Place the closed end of the quartz sleeve into thethreaded nipple and slowly push the sleeve through thechamber.

8. Assemble the compression nut and o-ring. Place the o-ring into the internal relief of the compression nut belowthe threaded area. The o-ring should fit into the com-pression nut.

9. Place the compression nut and o-ring onto the end of thequartz sleeve until the end of the quartz sleeve touchesthe end of the compression nut, and hand-tighten untilsnug. Deionized water may be used as a lubricant.

10. Tighten the compression nut securely using theprovided compression nut tool. Be careful not toovertighten.

11. Slowly pressurize the system and fill the chamber withwater to check for leaks.

12. You are now ready to install the UV lamp.

Step 6: Remove compression nut from threaded nipple

Step 7: Place end of quartz sleeve into threaded nipple

Step 5: Remove the cover. (Unit pictured is a DW-5)

Step 9-10: Place compression nut on threaded nipple and gentlytighten with compression nut tool.

Step 8: Place o-ring inside compression nut

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Over tightening can break thequartz sleeve or create leaks.

quartz sleeve installationprocedure: double-ended unitsThe quartz sleeves designed for this unit utilize a quartz tubethat is open on both ends.

1. Turn off all power to the unit.

2. Wear clean cotton gloves to prevent contamination ofthe quartz sleeves.

3. Carefully remove the quartz sleeve from the factorypackaging. Handle these with care as they are fragile.

4. Visually inspect all quartz sleeves for cracks or otherdamage. Do not install damaged quartz sleeves.

5. Remove the cover from the treatment chamber.

6. Remove the compression nut.

7. Place the end of the quartz sleeve into the threadednipple and slowly push the sleeve through the chamberto the second endplate.

8. Assemble the compression nut and o-ring. Place the o-ring into the internal relief of the compression nut belowthe threaded area. The o-ring should fit into the com-pression nut.

9. Place the compression nut and o-ring onto the end of thequartz sleeve until the end of the quartz sleeve touchesthe end of the compression nut, and hand-tighten untilsnug. Deionized water may be used as a lubricant.

10. Tighten the compression nut securely using theprovided compression nut tool. Be careful not toovertighten.

11. Verify that the drain plug is tightly closed (DW-8 modelsonly).

12. Slowly pressurize the system and fill the chamber withwater to check for leaks.

13. You are now ready to install the UV lamp.

Step 6: Remove compression nut from threaded nipple

Step 7: Place end of quartz sleeve into threaded nipple

Step 5: Remove the cover. (Unit pictured is a DW-8)

Step 9: Place compression nut on threaded nipple.

Step 8: Place o-ring inside compression nut

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installing the UV lamps:single-ended unitsOnce is has been verified that there are no leaks in thesystem, the unit is ready for UV lamp installation.

1. Turn off all power to the UV unit.

2. Depressurize the system.

3. Wear clean cotton gloves to prevent contamination ofthe UV lamps.

4. Carefully remove the UV Lamp from the factorypackaging. Handle the lamp with care, as it is fragile.

5. Visually inspect all lamps for cracks or damage. Donot install damaged lamps.

6. Using both hands, slowly insert the lamp into thequartz sleeve by pushing it with one hand whileguiding it with the other in a level, horizontalposition. This is very important. If not installedproperly, lamp or quartz breakage will occur.

7. Twist the lamp into the locking mechanism of thecompression nut. This ensures the lamp is securewithin the chamber.

8. The lamp pins must be pushed down to fit securelyin the lamp socket connector.

9. Screw the lamp socket retainer cap clockwise intoplace over the lamp socket. Only hand tighteningis required. Do not overtighten.

Step 6: Insert the UV lamp into the quartz sleeve

Step 6: UV lamp inserted

Step 9: Tighten the lamp socket retainer cap.

CAUTION! Prior to energizing the ballasts and lamps, ensure there is nowater leaking into the quartz sleeves and compression nut cavities byproperly installing these components. Even a small leak can flood aquartz sleeve and compression nut cavity.

During operation, high voltage is present at the lamp pins and recep-tacles of the lamp connectors. Prolonged flooding of a quartz sleeve andcompression nut cavity can cause premature failure of the lamp due torepeated arcing, overheating of the lamp connector cable, and mayresult in a meltdown of the cable insulation.

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installing the UV lamps:double-ended unitsOnce is has been verified that there are no leaks in thesystem, the unit is ready for UV lamp installation.

1. Remove all power to the UV unit.

2. Depressurize the system.

3. Wear clean cotton gloves to prevent contamination of theUV lamps. Carefully remove the UV lamp from the factorypackaging. Handle the lamp with care, as it is fragile.

4. Visually inspect all lamps for cracks or damage. Do notinstall damaged lamps.

5. Insert the UV lamp into open quartz sleeve and push itabout 2”-3” (51-76mm) out beyond the opposite com-pression nut, so as to be able to hold the lamp with onehand.

6. Insert the lamp base into the rubber socket. Push untilyou feel a firm “bottomed out” connection.

7. With one hand, push the lamp socket boot onto the endof the ultraviolet lamp and connect the opposite lampsocket. When properly attached, a slight “snap” can befelt, which indicates a proper connection. Verify noportion of the rubber boot has folded under during thisprocess.

Step 5: Insert the UV lamp into the quartz sleeve

Step 8: Connect lamp socket to lamp locating pin

CAUTION! Prior to energizing the ballasts and lamps, ensure there is no waterleaking into the quartz sleeves and compression nut cavities by properly install-ing these components. Even a small leak can flood a quartz sleeve and com-pression nut cavity.

During operation, high voltage is present at the lamp pins and receptacles ofthe lamp connectors. Prolonged flooding of a quartz sleeve and compressionnut cavity can cause premature failure of the lamp due to repeated arcing, overheating ofthe lamp connector cable, and may result in a meltdown of the cable insulation.

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prior to turning on the UVunit, the following must beverified:• With water flowing through the system, ensure there are no system leaks and no piping connection leaks

• All earth ground connections are properly made

• All lamp connections are properly made

1. Verify that all incoming power conductors, includ-ing the ground conductor, are properly terminated.

2. Plug in the unit.

3. Observe the UV lamp LED to verify the lamp isoperating properly.

4. Turn the power off until actual operational start upbegins.

sanitizing the systemIt is imperative all discharge piping valves, faucets, etc.,be sanitized and flushed to insure a clean start. Super-chlorinate all plumbing lines by putting the equivalentof two gallons or 5¼ % bleach into the well or the pointclosest to the well. Open every faucet until a strongchlorine odor is detectable. Leave this solution in alllines for at least four hours before purging. Beforeflushing lines, proceed to the next step, since UV-treatedwater must be used to rinse the chlorine water from alllines.

Next, plug in the UV unit and observe the viewing lensto verify the UV lamp is operating. Once the UV unit isin operation, turn on the main water supply and openevery faucet until the chlorine odor is dissipated. Startwith the faucet closest to the well or supply source.

If considerable red water and/or turbid water is notedcoming from the faucets after the super-chlorinationprocedure, it is recommended that you inspect thequartz sleeve and clean if dirty (See MaintenanceSection.)

Over time, follow-up water testing analysis can showregrowth of bacteria in the discharge piping andfaucets; re-sanitization would then be required.

CAUTION! Rapid succes-sive cycling of the powerto the ballast can causepremature failure of thesystem components.

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lamp viewportDW-8 Models with double-ended lampdesign

When the UV lamp is operating properly, you will beable to see a faint blue glow through the viewport onthe outside of the unit.

If you do not see a faint blue glow through theviewport, the lamp will need to be replaced.

Lamp-failure buzzer optionFor single-ended units only

The buzzer is an optional accessory that is activatedwhen the UV lamp fails to operate. Upon such condi-tion, the LED indicator will automatically turn off andthe buzzer will sound.At this time, check the powerconnections and UV lamp, which may need to bereplaced.

This option is provided only for the DW-5 and DW-8 SEunits.

Remember: NEVER lookdirectly at the lighted blueUV lamp or allow it to beoperated outside the UVchamber.

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cleaning the unitThe exterior surfaces of the Aquafine UV unit shouldbe kept clean as part of routine maintenance. Use asoft cloth with soap and water or any commercialstainless steel cleaner.

UV lamp replacementReplace the DW unit’s UV lamps after 8,000 hours ofuse.

THIS IS BASED ON NO MORE THAN THREE (3) ON/OFF POWER CYCLES PER 24 HOUR PERIOD.

Please follow all operating requirements outlined thewarranty section of this manual.

Premature lamp failure or lamp life deterioration canbe expected if the UV unit is cycled on/off more thanthree (3) times per day. To replace the lamps, followthe procedures on page 11-12.

quartz sleeve cleaning& replacementAs water passes through the ultraviolet treatment unit,minerals, debris and other substances in the water willsettle and deposit onto the quartz sleeve. This will impairthe ability of the ultraviolet rays to penetrate the water.

Recent studies have shown that degradation of the quartzsleeve from continuous exposure to UV reduces the amountof UV radiation transmitted into the water stream. Based onthese findings, we recommend the annual replacement of thequartz sleeves in addition to routine cleaning.

cleaning the quartz sleevesVisually inspect a quartz sleeve thirty days after use tosee if any debris or film has settled on the outside.If dirty, follow these cleaning procedures:

1. Turn off the main water to the unit.

2. Disconnect the electrical power to the unit.

3. Remove the exterior unit cover.

4. Remove the retainer caps for unit with single-endedlamp and lamp sockets.

5. Wear clean cotton gloves to prevent contamination ofthe quartz sleeves and UV lamps.

6. Remove the UV lamp from the chamber. Set aside in asafe place.

7. Loosen the compression nuts and let water drainfrom the chamber and plumbing lines.

8. For the DW-8 with double-ended lamp design,loosen the compression nuts and remove thequartz sleeve by inserting your finger in theopposing end to guide the sleeve as it is pulledthrough the chamber. WARNING: Do not let thefree end of the quartz sleeve drop into thechamber. Doing so will chip or break the quartz.

9. Wash the quartz sleeves with mild soap and waterand rinse with clean, hot water.

10. Reinstall the quartz sleeve and ultraviolet lamp aspreviously instructed.

11. Replace the UV unit cover.

Should this be insufficient to clean the quartz sleeves,they should be replaced.

To place an order, contact Aquafine or your localrepresentative.

To replace the quartz sleeves, follow the procedures onpage 9 and 10.

CAUTION! Prior to removingthe cover to access thelamps and quartz sleeves,you must releaseall pressure to the UV treat-ment chamber. Drain thechamber if required.

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ballast replacementBallast replacement is not part of the UV unit’s routinemaintenance. However, in the event that a ballast needs tobe replaced, the following procedure should be followed:

1. Power down the UV unit. If not, ensure that power to theunit is removed by opening the switch or breakerupstream of the UV unit.

2. Locate the old ballast to be replaced. Refer to theelectrical diagram, if necessary.

3. Isolate the old ballast from rest of system by disconnect-ing the wires.

4. Using 5/32 L-shaped hex wrench completely removethe bolt securing the ballast to the sub panel. Put thebolt aside.

5. Remove the old ballast by pulling it towards you.Discard the old or defective ballast.

6. Install the new ballast, securing it with the boltremoved earlier.

7. Tighten the bolt with 5/32 L-shaped hex wrench.

8. Reconnect ballast connector(s).

9. Restore the power to the UV unit by closing the up-stream switch or breaker.

measuring performanceEvery UV treatment unit should be tested periodically toverify actual efficiency. Regardless of the intended applica-tion or any optional equipment which may have beenprovided with your UV unit, the most accurate and depend-able procedure is to conduct post-UV sample analysis inaccordance with standard testing methods.

Periodic sample collection and testing should be scheduledas often as the user deems sufficient to be assured thequality of the Aquafine ultraviolet unit effluent is accept-able.

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obtaining properwater samplesOur experience has shown that the vast majority ofunsatisfactory post-UV bacteriological samples aredirectly related to improper sample-taking techniques.

There are variety of commercial sample collectionapparatus available and should you choose one, be sureto follow the manufacturer’s recommended procedures.

We recommend you select a valve with a dischargeorifice no larger than 1/4” (6 mm).

sampling procedureThe following procedure is recommended for collectingsamples for bacteriological analysis when samplevalves are installed:

1. Prior to taking the water sample, have on hand anadequate supply of sterile bottles. These should beobtained from a source laboratory and should havebeen autoclaved and contained within a plastic outerwrapping.

2. The inside diameter of a sample valve must notexceed 1/4” (6 mm) to ensure proper velocity. Prior totaking the sample, it is imperative that the test samplevalve be fully opened under full pressure for com-plete three and one half minutes. Temporary tubingor some other material may be used to direct thewater to a container or drain to avoid unnecessaryspillage.

3. After the valve has been left fully open for three andone half minutes, reduce the flow to a reasonablestream of water (not less than 50% of full flow).Continue flowing to drain three additional minutes.

4. Remove any temporary used for flow diversion.

5. Open the sterile bottle. Holding the cap in a downposition, the operator should then hold his breathwhile taking the sample so as to avoid atmosphericcontamination of the sample. The operator must alsonot allow his finger to touch the inside of the cap orthe neck of the bottle.

6. After the water sample has been taken, the cap shouldbe immediately secured on the sample container.

7. The sample container should be labeled and placed ina plastic wrapping and must be taken to the labora-tory for plating as soon as possible. Processing shouldbegin within three hours of sample collection andshould comply with accepted standard methods.

The above procedure was developed by a leadingnational pharmaceutical firm after an 18 month study. Ithas been found that virtually all removable debris whichmay accumulate within a sample valve can be mechani-cally flushed during the procedures detailed above.

We recommend duplicate samples be taken at each teststation, during each specific test, to avoid laboratoryerror and to ensure reasonable repeatability and validitythrough comparison.

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Refer to this nameplate decal on yourunit when ordering parts or service.

general part description part number

Common Parts for DW-5 and DW-8 SE Models

1. Compression nut - CPVC ...................................................................................................17496Compression nut - 316 LSS ................................................................................................18468

2. Lamp socket cap ................................................................................................................174893. Lamp socket ..................................................................................................................... 17816-34. O-ring- EPDM..................................................................................................................... 42535. Compression nut tool ........................................................................................................18517

DW-5 Parts

1. Ballast, 120 Volt ..................................................................................................................188552. UV lamps, standard SE 254 mauve ....................................................................................193063. Quartz sleeves, domed .......................................................................................................19330

DW-8 Single-Ended (SE) Parts

1. UV lamps, standard SE 254 mauve ....................................................................................174912. Quartz sleeves, domed .......................................................................................................183473. Ballast, 120 Volt .................................................................................................................. 40354. Ballast, 240 Volt .................................................................................................................. 3493

DW-8 Double-Ended (DE) Lamp Unit Parts

1. UV lamps, standard DE 254 mauve ................................................................................... 30842. Quartz sleeves, open end .................................................................................................. 31843. O-ring, EPDM..................................................................................................................... 42534. Compression nut, CPVC .................................................................................................... 42525. Lamp socket .......................................................................................................................161846. Ballast, 120 Volt .................................................................................................................. 40357. Ballast, 240 Volt .................................................................................................................. 34938. Compression Nut tool ........................................................................................................ 3105