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WSC's
Best Practice for CT Maintenance
Nozzles
and manifolds
Plugged
nozzles are a major problem to tower performance. Regardless of
the strainers or other measures taken to remove or reduce scale,
nozzles become the most efficient filter in the system. Header
pressure increased by plugged nozzles, will eventually build to
point where nozzles will blow out. Then, most of the water will
blast through the larger openings created by the missing nozzles
starving the remaining nozzles and boring a hole in the fill media.
Surface media
Cooling tower fill is the heart of the tower. The rest of the
tower just distributes water and air over the fill and captures
cool water for the chiller. Fill is expensive to replace, so preserve
it. Maintain the support channels, replace missing nozzles to
avoid blowing it apart and keep it clean with proper chemical
treatment and mechanical cleaning.
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Our
Tower performance depends upon proper maintenance
As towers age, efficiency tends to fall-off which effects
chiller performance. Summer brings warmer days and greater
demand on the chill-water system. Decreases in efficiency
result in increases demand for power and water.
Scale,
silt and debris
Removal should be done at least annually. Scale is either
removed by maintenance technicians or will plug-up nozzles
and be picked out by the same techs a piece at a time. "Pay
me now or pay me later" is over-used but seems the best
way to describe results of poor maintenance. |
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Legionella
Pneumophila (LD)
Cooling tower systems are an ideal environment for growth
of Legionella. CT drift in the form of aerosols can be easily
inhaled. Showers, washstands, sinks, air scrubbers and air
handlers can also provide a good growth environment and possible
means of transmission. Sediment, sludge, scale and organic
materials can harbor the bacterium and promote growth. The
formation of a biofilm within a water system is thought to
play an important role in harboring and providing favorable
conditions in which LD can grow. A biofilm is a layer of microorganism
contained in a matrix that may form a thin layer of slime
on surfaces in contact with water. LD grows within biofilm
and within protozoa acting to shield Legionella pneumophila
from concentrations of biocides that would otherwise kill
or inhibit them when freely suspended in water.
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Fans,
shafts, motors, belts and bearings
The rotating parts of a cooling tower are no different than
any other fans. Treat them accordingly. Our technicians are
trained and experienced at maintaining the moving parts of
cooling towers.
WSC
is serious about servicing towers
Our technicians physically clean each cooling tower. After
cleaning, we inspect hot water basins, wet deck, sumps and
air inlet louvers for signs of corrosion. Our technicians
complete a service report on the job ticket that includes
comments on the tower’s condition. A copy of the report
is given to the customers representative and forwarded to
the General Manager service recommendations. For questions
regarding your specific facility needs, contact us today by
e-mailing info@wscnc.com
or, by phoning (800) 522-9338. |
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