ATS DWS-25, Installation, Operation And Maintenance Manual, Page: 9 / 16

9
Maintenance
sleeve). Replace O-Ring [ATS8-544(2)] every time a quartz
sleeve is cleaned or replaced. We reccommend replacing the
quartz sleeve once a year.
U.V. LAMPS:
INSTALLATION OF THE ULTRAVIOLET LAMPS:
**DO NOT PUT POWER ON AT THIS TIME!**
CAUTION: Never operate or look directly at U.V.
lamp outside the disinfection chamber.
Make sure unit is unplugged when installing or servicing
ultraviolet lamp. Remove any paper tabs on the U.V. lamp
and avoid allowing fingerprints and other debris to deposit.
Carefully place the lamp inside the quartz sleeve leaving
enough space to connect the socket connector to the lamp
pins. Then gently slide the brass dust cap over the end nut,
securing the lamp and protecting it from dust.
ULTRAVIOLET LAMP MAINTENANCE
REQUIREMENTS:
The U.V. lamp is rated for 9,000 hours of continuous use.
After this period of time, the U.V. lamp has undergone a
photochemical change. While the lamp will not normally be
burned out, the lamp quartz may no longer emit the 254-nm
shortwave U.V. to effectively kill bacteria. Failure to replace
the U.V. lamps every 9,000 hours may cause bacteriological
breakthrough. Should the use of the disinfection unit be
intermittent, in no case should the U.V. lamp be used for
more than 24 months regardless of the number of hours
of operation due to normal shelf life degradation of the
U.V. bulb. Changing the quartz sleeve should be done
at the same time U.V. lamp replacement is scheduled.
It is recommended that your water supply be tested
periodically (yearly) through your local health department or
approved certified laboratory.
ELECTRICAL:
The DWS/DWSW series are furnished with 6’ line cord that
will plug into a 110V outlet. Electrical receptacles must be
properly grounded for safe operation. Improper grounding
will void any warranty.
When possible use a separate breaker to minimize voltage
fluctuations and avoid accidental shut off. After unit is
installed and water is turned on, plug the unit into 110V wall
receptacle. View lamp operation through safety Sight Port
lens.
NOTE: Avoid exposing your eyes to U.V. light.
QUARTZ SLEEVE:
Installation of the Quartz Sleeve:
Always handle quartz sleeves carefully to prevent breaking
or chipping. The quartz sleeves are to be clean and free of
fingerprints before installing.
Remove the compression nut. Install the quartz
sleeve through the stainless steel threaded nipple
allowing an equal amount to extend beyond each
nipple. Install the O-Ring down the top of the
nipple. Avoid riding the O-Ring on any threaded part of
the nipple. Hand-tighten each compression nut to form a
compression seal around the quartz sleeve. Avoid overtightening
the nuts, which may cause a fracture on the end of the quartz
sleeve. Under normal operation conditions, hand-tightening
will provide a 100 psi seal. Do not use any devices to tighten end
nuts. Repeat this procedure at the opposite end of the chamber.
After you have tightened the compression nut and
all other plumbing connections, open the outlet
valve. Slowly open the inlet valve and flush out
all remaining air. Then close the outlet valve and
slowly open the inlet valve fully. Check the unit for leaks.
If you find a leak at the compression nut, tighten the nut
further. If the leak continues, drain the unit and inspect
the quartz O-Ring and quartz sleeve for proper seal. Once
you complete checking the unit, reassemble O-Ring and
tighten gland nut. Repressurize the unit and check again.
REQUIREMENTS FOR CLEANING THE QUARTZ
SLEEVE:
As water passes through the U.V., minerals, debris and other
matter in the water may deposit onto the quartz sleeve. After
sufficient film has formed on the quartz sleeve, the ability of
the ultraviolet germicidal rays to pass though the quartz sleeve
and into the water may be impaired. Therefore, it is necessary
to determine a cleaning schedule for the quartz sleeve. The
frequency will depend on the specific type of water conditions.
If the water has been processed through deionization, reverse
osmosis, or is distilled, cleaning may be required only once per
year. If untreated water is used, the cleaning frequency will
vary. A minimum of once yearly is standard recommendation
for cleaning and lamp replacement. Contact your local dealer
for scheduling this service. Your specific situation will vary the
frequency time according to the water quality of the home or
facility application.
QUARTZ SLEEVE CLEANING PROCEDURES:
To clean the quartz sleeve, turn off the water flow to the
disinfection unit, turn power off, and at a separate faucet or
valve relieve the water pressure from the UV. Then disconnect
the electrical service to the lamp pins. Carefully remove the
U.V. lamp. Loosen the end nut with O-Ring and remove the
quartz sleeve. The quartz sleeve may then be washed with a
mild soap and hot water solution and rinsed clean with hot
water. Should this be insufficient to clean the quartz sleeve,
a mild acid may be used (i.e. vinegar). Be certain to follow
all recommended safety and handling procedures on the acid
container. It is important to handle the quartz sleeve with care
to prevent breakage. Make certain that all finger prints are
wiped clean before reinstalling (see installation of the quartz
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