Trojan Technologies Aquafine DW Series User manual

READ THIS MANUAL
PLEASE 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 all
instructions and guidelines. EQUIPMENT OPERATORS AND INSTALLERS
MUST COMPLY WITH OPERATIONAL SAFETY REQUIREMENTS.
Aquafine Corporation builds the finest quality ultraviolet equipment in the
world. When properly installed and operated, Aquafine ultraviolet
treatment units will provide many years of service.
DW Series Installation,
Maintenance and
Operation Manual
Part No. 109-1
This manual covers the preliminary installation, operation and general
maintenance requirements for Aquafine Ultraviolet Water Treatment
Equipment for the following applications:
• Disinfection
ATTENTION:
The information on Page 5 #10 regarding “War-
rantyInformation”andpage#8regardingthe“Intermit-
tentOperation”Section(Note:Onthe“IntermittentOp-
eration”theentiresection,doesnotapplytoeitherunitin
the DW Series). These are misprints and should be disre-
garded!
AnyquestionscontactAquafineCorporation

2
Installation and Operational Safety ................3
Description of Equipment
DW Series Ultraviolet (UV) Treatment Unit .......4
Warranty Information ...................................4-5
Unit Installation
Where to Install the Unit..................................... 6
How to Protect Your Unit ...................................6
Operating Pressure .............................................6
DW Installation...................................................6
Grounding the Unit .............................................. 7
Intermittent Operating Requirements ...................8
Requirements 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 Devices
Lamps Operational Viewport ............................ 14
Maintenance Requirements ......................... 15
Cleaning the Unit .............................................. 15
UV Lamp Replacement .................................... 15
Quartz Sleeve Cleaning & Replacement ........... 15
Ballast Replacement ......................................... 16
Measuring Performance ................................... 16
Obtaining Samples ............................................ 17
SamplingProcedures ........................................ 17
Parts List ........................................................ 18
Electrical Diagram, General Outline Drawing,
General Assembly Drawing and
Warranty Registration Card...........Back Pocket
Refer to this nameplate decal on your
unit when ordering parts or service.

3
safety requirements for
UV equipment
The following safety requirements
directly relate to operator safety. Please
review with all appropriate personnel to
ensure continuous compliance.
These safety requirements are
MANDATORY.
Failure to carefully follow these require-
ments can cause injury to the operator
and damage the UV unit.
1. Release the pressure in the UV treatment chamber
before attempting to remove the protective covers
and sealing items.
2. Disconnect all power to the UV unit before
servicing. The unit operates on high voltage and
should only be serviced by qualified personnel.
3. Do not look at the lighted blue ultraviolet lamp. Do
not operate the ultraviolet lamp outside of the UV
treatment chamber. Exposure can severely burn and
damage eyes and skin.
4. Supply the unit with the correct voltage and
frequency as indicated on the nameplate decal,
ensuring the unit is wired in accordance with local
electrical codes.
5. Properly ground the unit. Failure to comply may
result in severe or fatal electrical shock.
6. Install the unit away from undue vibration that can
damage the electrical components and UV lamps.
7. Ensure all water connections (flanges and compres-
sion nuts) are tightly sealed before applying
pressure to the UV unit. Do not stand in a direct
line with the endplate when inspecting for water
leaks; observe from the front or back.
This “Safety Issue” icon marks
all items relating to safety issues.
Please read and adhere to these
comments carefully.
DO NOT
LOOK AT
UV LIGHT
8. Do not allow the unit to overheat by operating
without water flow. Normal operating temperature
for standard UV units is 35° to 100°F (2°-38°C).
9. Iftheinletwatertemperatureexceeds100°F(38°C),
contact the factory for assistance.
10. Do not allow the water temperature to drop below
35°F (2°C).
11. Do not allow the flow rate to exceed the maximum
rated capacity.
12. DO NOT ELECTRICALLY CYCLE THE UV
UNITMORETHANTHREE(3)ON/OFFCYCLESIN
A24-HOURPERIOD.
13. Before start up, flush the UV unit and discharge
piping to rinse out any debris left from installation.

4
DW series
The model DW is intended for disinfection of domestic
drinking water which meets minimum acceptable water
quality standards. This UV device is not intended for
industrial use or harsh environments.
This unit is not intended for destruction of cysts.
Should your water source be from surface waters, the
possibility of cyst contamination is present and you
should install a cyst removal filter which meets or
exceeds National Sanitation Foundation (NSF) Standard
53.
The water entering the UV unit must meet certain
“clarity and minimum contaminant standards” in order
to be acceptable for UV treatment. To the untrained eye,
the water must be clear, free of color and visible
particles. From a technical point-of-view, the water must
be pretested to insure non-visible contaminants are not
present which can block the UV light rays and prevent
proper performance.
Do not install or operate the UV treatment unit until the
followingminimumcontaminant levels inthefeed water
are assured:
•Turbidity: Less than 2 NTU
•Suspended solids: Less than 10 mg/L
•MaximumTotal Iron:0.3 mg/L
•MaximumTotal Manganese: 0.5 mg/L
•Color:None
•pH:6.5 - 9.5
Pretreating the water with appropriate filtration and/or
other devices may be necessary to bring the water
quality up to acceptable “UV transmission” levels. Only
then should you install and operate this or any other
potable UV unit. Failure to provide acceptable water
quality can promote premature and excessive fouling or
coating of the quartz sleeve. This will not only effect
performance, but will also create an unacceptable
cleaning and maintenance schedule.
THISUVDISINFECTIONUNITIS
INTENDEDTOTREATDOMESTIC
DRINKINGWATERWHICHHAS
BEENTESTEDANDPRETREATED
ASREQUIREDTOINSURETHE
INLETWATERTOTHEUVUNIT
MEETSMINIMUMACCEPTABLEWATERQUALITY
STANDARDSDESCRIBEDABOVE.
The disinfection unit is comprised of a stainless steel
chamber with a water inlet and outlet. A UV lamp is
located in the center of the chamber and is contained
within a fused quartz sleeve.
As water flows through the chamber, the UV lamp
produces UV light rays that pass through the quartz
sleeve and into the water, penetrates the outer cell
membrane of microorganisms, passes through the cell
body, 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 be
replaced without having to break the water seal. The
chamber and electrical components are housed in a
protective metal cabinet.

5
5. Failure to avoid excessive stops and starts. Not
more than three (3) on/off cycles per 24 hours
of operation.
6. Operation of visibly damaged equipment.
7. Failure to avoid undue overhead piping stress
which may result in structural damage to the
UV unit.
8. Use of components other than those provided or
authorized by Aquafine.
9. Failure to correct overhead piping connection leaks
or compression nut seal leaks which result in
damage to the electrical components.
10. Operating the unit without water flow.
TomaintainyourUVunitswarranty,pleasefilloutand
mailtheWarrantyRegistrationCardintheback
pocketofthismanualandreturntoAquafineCustomer
Service.
The following installation and operating conditions
are considered hazardous or damaging to the
equipment and can compromise the ability of the
Aquafine unit to perform as intended.
ANY OF THE FOLLOWING CONDITIONS
MAY 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, piping
movement, or water hammer.
4. Failure to exercise caution in the handling of the
sensitive and delicate components (such as
lamps, quartz sleeves, electronic boards, etc.)
during installation and/or maintenance proce-
dures.

6
Aquafine equipment is guaranteed to be free from
defects in materials and workmanship (excluding
ultraviolet lamps) for a period of one year from the
date of purchase. Any part suspected of being
defective should be returned prepaid to Aquafine
Corporation. 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 Aquafine
Corporation for return authorization and shipping
instructions. This guarantee is void if the equipment
has not been installed and maintained in
accordance with instructions. This guarantee is in
lieu of all other warranties, expressed or implied.
To keep your warranty valid and to ensure peak
performance, fill out and return your warranty
registration card (located in the back pocket of
this manual) and use only genuine Aquafine
replacement parts.
WARRANTY
more

7
where to install the unit
The UV unit should be installed after all other water
conditioning equipment. Mount the unit to a wall or
braced frame using the mounting tabs. Install a bypass
with unions.
Install the UV treatment unit in a sheltered area with
ample ventilation. Ambient temperatures surrounding
the unit should be between 35oF (2oC) and 110oF(43oC).
Should your requirements differ, contact the factory for
assistance.
As an ultraviolet UV treatment unit does not introduce
any chemical residue within the water, it is desirable to
install the unit as close as possible to the point of use in
order to avoid potential recontamination by discharge
pipes, fittings, etc. The base of the UV treatment unit
should be mounted on suitable support to avoid undue
strain on the unit or your related pipes and fittings.
The UV unit should be installed after all other water
conditioning equipment and as close to the end point of
use as possible. For example, it should not be installed
in a remote well house; it should be installed at the
house. If filtration or other water treatment equipment is
installed, the UV unit must be installed after all such
equipment.
how to protect your unit
The location should be free from undue vibration which
could be caused by proximity to heavy equipment and
erratic or improper pumps. Excessive vibration will
damage internal electrical components and cause
prematurefailureof the UVlamps.
If your piping system is subject to impulse pressure
resulting in a “water hammer” condition, a surge tank or
other means must be provided to remove this condition,
otherwise the extreme momentary pressure may rupture
and fracture the quartz sleeves.
operating pressure
Standard units are rated for a maximum operating
pressure of120 psig (8.3 bar).
Apartscheck listwas includedwhen
thisunitwas shipped.Please referto
thislistandnotethatsomepartsare
smalland canbeeasily overlooked
whendiscardingpackaging.
DW-8 installation
Allow 40” (102cm) service access clearance on the inlet
side and 12” (31cm) on the outlet side clearance on the
opposite end of the unit. For the DW-8 DE unit, a
minimumof 2feet clearance is required belowthe
bottom of the unit to operate the drain valve (supplied
by others).
If vertical installation is required due to lack of horizon-
tal access space, the inlet water connection
must be at the bottom.
DW-5 installation
Allow 16” (41 cm) service access clearance on both
ends of the unit.
If vertical installation is required due to lack of horizon-
tal access space, the inlet water connection
must be at the bottom.
grounding
It is imperative that the unit be properly grounded for
safe and proper operation.
Failure to properly ground the UV unit automatically
voids the equipment warranty.
Line voltage to the UV unit must be stable. Performance
will be reduced should incoming line voltage drop more
than 5% from the rated voltage as indicated on the
nameplate decal on the unit.

8
special piping requirements
for users of ultrapure water
Ultrapure water users have reported that over time,
exposure to ultraviolet light may photochemically
degrade nonmetallic piping materials, including most
or all fluoro-polymers, resulting in material break-
down and/or structural failure. Should your water
application and piping material be so classified, we
recommend you install “UV light traps” to isolate any
such susceptible material from direct exposure to the
ultraviolet 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 protect
nonmetallic piping. Should you require additional
assistance, please contact your local Aquafine
representative or the factory directly.
more
Ifthe location ofthe UV unit
isvacantfor 3or moredays,
theUV unitshould be
unpluggedtoprevent
overheating.Afterplugging
inthe UVunit from acold start,it takes
about3minutesforthelamptowarmupto
100%UVpower.

9
Overtightening canbreak the
quartz sleeve or create leaks.
quartz sleeve installation
procedure: single-ended units
The quartz sleeves designed for this unit utilize a quartz tube
that is open on one end and closed on the other end. The
closed 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 of
the quartz sleeves.
3. Carefully remove the quartz sleeve from the factory
packaging. Handle these with care as they are fragile.
4. Visually inspect all quartz sleeves for cracks or other
damage. 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 the
threaded nipple and slowly push the sleeve through the
chamber.
8. Assemble the compression nut and o-ring. Place the o-
ring into the internal relief of the compression nut below
the threaded area. The o-ring should fit into the com-
pression nut.
9. Place the compression nut and o-ring onto the end of the
quartz sleeve until the end of the quartz sleeve touches
the end of the compression nut, and hand-tighten until
snug. Deionized water may be used as a lubricant.
10. Tighten the compression nut securely using the
provided compression nut tool. Be careful not to
overtighten.
11. Slowly pressurize the system and fill the chamber with
water 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 gently
tighten with compression nut tool.
Step 8: Place o-ring inside compression nut

10
Over tightening can break the
quartz sleeve or create leaks.
quartz sleeve installation
procedure: double-ended units
The quartz sleeves designed for this unit utilize a quartz tube
that is open on both ends.
1. Turn off all power to the unit.
2. Wear clean cotton gloves to prevent contamination of
the quartz sleeves.
3. Carefully remove the quartz sleeve from the factory
packaging. Handle these with care as they are fragile.
4. Visually inspect all quartz sleeves for cracks or other
damage. 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 threaded
nipple and slowly push the sleeve through the chamber
to the second endplate.
8. Assemble the compression nut and o-ring. Place the o-
ring into the internal relief of the compression nut below
the threaded area. The o-ring should fit into the com-
pression nut.
9. Place the compression nut and o-ring onto the end of the
quartz sleeve until the end of the quartz sleeve touches
the end of the compression nut, and hand-tighten until
snug. Deionized water may be used as a lubricant.
10. Tighten the compression nut securely using the
provided compression nut tool. Be careful not to
overtighten.
11. Verify that the drain plug is tightly closed (DW-8 models
only).
12. Slowly pressurize the system and fill the chamber with
water 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

11
installing the UV lamps:
single-ended units
Once is has been verified that there are no leaks in the
system, 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 of
the UV lamps.
4. CarefullyremovetheUVLampfromthefactory
packaging. Handle the lamp with care, as it is fragile.
5. Visually inspect all lamps for cracks or damage. Do
not install damaged lamps.
6. Using both hands, slowly insert the lamp into the
quartz sleeve by pushing it with one hand while
guiding it with the other in a level, horizontal
position. This is very important. If not installed
properly, lamp or quartz breakage will occur.
7. Twist the lamp into the locking mechanism of the
compression nut. This ensures the lamp is secure
within the chamber.
8. The lamp pins must be pushed down to fit securely
in the lamp socket connector.
9. Screw the lamp socket retainer cap clockwise into
place over the lamp socket. Only hand tightening
is 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 no
water leaking into the quartz sleeves and compression nut cavities by
properly installing these components. Even a small leak can flood a
quartz 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 and
compression nut cavity can cause premature failure of the lamp due to
repeated arcing, overheating of the lamp connector cable, and may
result in a meltdown of the cable insulation.

12
installing the UV lamps:
double-ended units
Once is has been verified that there are no leaks in the
system, the unit is ready for UV lamp installation.
1. Removeall power tothe UVunit.
2. Depressurize the system.
3. Wear clean cotton gloves to prevent contamination of the
UVlamps.CarefullyremovetheUVlampfromthefactory
packaging. Handle the lamp with care, as it is fragile.
4. Visually inspect all lamps for cracks or damage. Do not
install damaged lamps.
5. Insert the UV lamp into open quartz sleeve and push it
about2”-3” (51-76mm)out beyondthe oppositecom-
pression nut, so as to be able to hold the lamp with one
hand.
6. Insert the lamp base into the rubber socket. Push until
you feel a firm “bottomed out” connection.
7. With one hand, push the lamp socket boot onto the end
of the ultraviolet lamp and connect the opposite lamp
socket. When properly attached, a slight “snap” can be
felt, which indicates a proper connection. Verify no
portionoftherubberboothasfoldedunderduringthis
process.
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 water
leaking 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 of
the lamp connectors. Prolonged flooding of a quartz sleeve and compression
nut cavity can cause premature failure of the lamp due to repeated arcing, overheating of
the lamp connector cable, and may result in a meltdown of the cable insulation.

13
prior to turning on the UV
unit, the following must be
verified:
• 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 is
operating properly.
4. Turn the power off until actual operational start up
begins.
sanitizing the system
It 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 equivalent
of two gallons or 5¼ % bleach into the well or the point
closest to the well. Open every faucet until a strong
chlorine odor is detectable. Leave this solution in all
lines for at least four hours before purging. Before
flushing lines, proceed to the next step, since UV-treated
water must be used to rinse the chlorine water from all
lines.
Next, plug in the UV unit and observe the viewing lens
to verify the UV lamp is operating. Once the UV unit is
in operation, turn on the main water supply and open
every faucet until the chlorine odor is dissipated. Start
with the faucet closest to the well or supply source.
If considerable red water and/or turbid water is noted
coming from the faucets after the super-chlorination
procedure, it is recommended that you inspect the
quartz sleeve and clean if dirty (See Maintenance
Section.)
Over time, follow-up water testing analysis can show
regrowth of bacteria in the discharge piping and
faucets; re-sanitization would then be required.
CAUTION! Rapid succes-
sive cycling of the power
to the ballast can cause
premature failure of the
system components.

14
lamp viewport
DW-8 Models with double-ended lamp
design
When the UV lamp is operating properly, you will be
able to see a faint blue glow through the viewport on
the outside of the unit.
If you do not see a faint blue glow through the
viewport, the lamp will need to be replaced.
Lamp-failure buzzer option
For single-ended units only
The buzzer is an optional accessory that is activated
when the UV lamp fails to operate. Upon such condi-
tion,theLED indicatorwill automatically turnoff and
the buzzer will sound.At this time, check the power
connections and UV lamp, which may need to be
replaced.
This option is provided only for the DW-5 and DW-8 SE
units.
Remember: NEVER look
directly at the lighted blue
UV lamp or allow it to be
operated outside the UV
chamber.

15
cleaning the unit
The exterior surfaces of the Aquafine UV unit should
be kept clean as part of routine maintenance. Use a
soft cloth with soap and water or any commercial
stainless steel cleaner.
UV lamp replacement
Replacethe DW unit’sUV lampsafter 8,000hours of
use.
THISISBASEDON NO MORETHANTHREE (3) ON/
OFFPOWERCYCLESPER24HOURPERIOD.
Pleasefollow all operatingrequirements outlinedthe
warranty section of this manual.
Premature lamp failure or lamp life deterioration can
be expected if the UV unit is cycled on/off more than
three (3) times per day. To replace the lamps, follow
the procedures on page 11-12.
quartz sleeve cleaning
& replacement
As water passes through the ultraviolet treatment unit,
minerals, debris and other substances in the water will
settle and deposit onto the quartz sleeve. This will impair
the ability of the ultraviolet rays to penetrate the water.
Recent studies have shown that degradation of the quartz
sleeve from continuous exposure to UV reduces the amount
of UV radiation transmitted into the water stream. Based on
these findings, we recommend the annual replacement of the
quartz sleeves in addition to routine cleaning.
cleaning the quartz sleeves
Visually inspect a quartz sleeve thirty days after use to
see 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. Removethe exteriorunit cover.
4. Remove the retainer caps for unit with single-ended
lamp and lamp sockets.
5. Wear clean cotton gloves to prevent contamination of
the quartz sleeves and UV lamps.
6. Remove the UV lamp from the chamber. Set aside in a
safe place.
7. Loosen the compression nuts and let water drain
from the chamber and plumbing lines.
8. For the DW-8 with double-ended lamp design,
loosen the compression nuts and remove the
quartz sleeve by inserting your finger in the
opposing end to guide the sleeve as it is pulled
through the chamber. WARNING: Donotletthe
free end of the quartz sleeve drop into the
chamber. Doing so will chip or break the quartz.
9. Wash the quartz sleeves with mild soap and water
and rinse with clean, hot water.
10. Reinstall the quartz sleeve and ultraviolet lamp as
previously 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 local
representative.
To replace the quartz sleeves, follow the procedures on
page9 and 10.
CAUTION! Prior to removing
the cover to access the
lamps and quartz sleeves,
you must release
all pressure to the UV treat-
ment chamber. Drain the
chamber if required.

16
more
ballast replacement
Ballast replacement is not part of the UV unit’s routine
maintenance. However, in the event that a ballast needs to
be replaced, the following procedure should be followed:
1. Power down the UV unit. If not, ensure that power to the
unit is removed by opening the switch or breaker
upstream of the UV unit.
2. Locate the old ballast to be replaced. Refer to the
electrical 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 remove
the bolt securing the ballast to the sub panel. Put the
bolt 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 bolt
removed 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 performance
Every UV treatment unit should be tested periodically to
verify actual efficiency. Regardless of the intended applica-
tion or any optional equipment which may have been
provided with your UV unit, the most accurate and depend-
able procedure is to conduct post-UV sample analysis in
accordance with standard testing methods.
Periodic sample collection and testing should be scheduled
as often as the user deems sufficient to be assured the
quality of the Aquafine ultraviolet unit effluent is accept-
able.

17
obtaining proper
water samples
Our experience has shown that the vast majority of
unsatisfactory post-UV bacteriological samples are
directly related to improper sample-taking techniques.
There are variety of commercial sample collection
apparatus available and should you choose one, be sure
to follow the manufacturer’s recommended procedures.
We recommend you select a valve with a discharge
orifice no larger than
1/4” (6 mm).
sampling procedure
The following procedure is recommended for collecting
samples for bacteriological analysis when sample
valves are installed:
1. Prior to taking the water sample, have on hand an
adequate supply of sterile bottles. These should be
obtained from a source laboratory and should have
been autoclaved and contained within a plastic outer
wrapping.
2. The inside diameter of a sample valve must not
exceed 1/4”(6mm) toensure proper velocity.Prior to
taking the sample, it is imperative that the test sample
valve be fully opened under full pressure for com-
plete three and one half minutes. Temporary tubing
or some other material may be used to direct the
water to a container or drain to avoid unnecessary
spillage.
3. After the valve has been left fully open for three and
one half minutes, reduce the flow to a reasonable
stream 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 down
position, the operator should then hold his breath
while taking the sample so as to avoid atmospheric
contamination of the sample. The operator must also
not allow his finger to touch the inside of the cap or
the neck of the bottle.
6. After the water sample has been taken, the cap should
be immediately secured on the sample container.
7. The sample container should be labeled and placed in
a plastic wrapping and must be taken to the labora-
tory for plating as soon as possible. Processing should
begin within three hours of sample collection and
should comply with accepted standard methods.
The above procedure was developed by a leading
national pharmaceutical firm after an 18 month study. It
has been found that virtually all removable debris which
may accumulate within a sample valve can be mechani-
cally flushed during the procedures detailed above.
We recommend duplicate samples be taken at each test
station, during each specific test, to avoid laboratory
error and to ensure reasonable repeatability and validity
through comparison.
more

18
Refer to this nameplate decal on your
unit when ordering parts or service.
general part description part number
CommonParts forDW-5 andDW-8 SEModels
1. Compressionnut - CPVC ...................................................................................................17496
Compressionnut-316LSS................................................................................................18468
2. Lamp socket cap ................................................................................................................17489
3. Lamp socket ..................................................................................................................... 17816-3
4. O-ring-EPDM..................................................................................................................... 4253
5. Compression nut tool ........................................................................................................18517
DW-5 Parts
1. Ballast, 120 Volt ..................................................................................................................18855
2. UVlamps, standard SE254 mauve ....................................................................................19306
3. Quartz sleeves, domed.......................................................................................................19330
DW-8Single-Ended(SE)Parts
1. UVlamps, standard SE254 mauve ....................................................................................17491
2. Quartz sleeves, domed.......................................................................................................18347
3. Ballast, 120 Volt .................................................................................................................. 4035
4. Ballast, 240 Volt .................................................................................................................. 3493
DW-8Double-Ended(DE) Lamp UnitParts
1. UVlamps,standard DE 254mauve ................................................................................... 3084
2. Quartz sleeves, open end .................................................................................................. 3184
3. O-ring,EPDM..................................................................................................................... 4253
4. Compression nut, CPVC .................................................................................................... 4252
5. Lamp socket .......................................................................................................................16184
6. Ballast, 120 Volt .................................................................................................................. 4035
7. Ballast, 240 Volt .................................................................................................................. 3493
8. Compression Nut tool........................................................................................................ 3105