Space available around the tower
should be as generous as possible to promote ease of
maintenance and to permit freedom of airflow into and
through the tower. If you have questions about the adequacy
of the available space and the intended configuration
of tower, please contact your Advance sales engineer
for guidance.
Prepare a stable, level support
foundation for the tower, utilizing weight, wing load,
dimensional information and piping directions appearing
on appropriate Advance submittal drawings.
The cooling tower must be located
at such distance and direction to avoid the possibility
of contaminated tower discharge air being drawn into
building fresh air intake ducts. The purchaser should
obtain the service of a Licensed Professional Engineer
or Registered Architect to certify that the location
of the tower is in compliance with applicable air pollution,
fire and clean air codes.
Heat load: With the fan
in full operation, if the heat load increases, the cold
water temperature will rise. If the heat load reduces,
the clod water temperature will reduce. Note that the
number of degrees (“range”) through which
the tower cools the water is established by the system
heat load and the amount of water being circulated,
in accordance with the following formula:
Heat Load (Btu/hr)
Heat Load (Kcal/hr)
Range (of)=
--------------------
Or, Range (oc)=
---------------------
GPM x 500
LPM x 60
The cooling tower establishes only the cold water temperature
attainable under any operating circumstance.
Air wet-bulb temperature: Cold water temperature
will also vary with the wet-bulb temperature of the
air entering the louvered faces of the tower. Reduced
wet-bulb temperatures will result in colder water temperatures.
However, the cold water temperature will not vary to
the same extent as the wet-bulb. For example, a100C
reduction in wet-bulb may result in only a 70C reduction
in cold water temperature.
Water quality:
•
Circulating water with
a pH between 6.5 and 8; a chloride content (as
NaCl) below 750 ppm; a sulphate content (SO4)
below 1200 ppm; a sodium bicarbonate content
(NaHCO3) below 200 ppm; a maximum inlet Calcium
(as CaCO3) below 1,200 ppm. - Silica (as SiO2)
below 150 ppm water temperature not to exceed
700C; no significant contamination with unusual
chemicals or foreign substance; and adequate
water treatment to minimize scaling.
•
Many systems can be successfully
treated with water treatment chemicals. For
complete information, contact your local Advance
application engineer.
•
Chlorine (if used) shall
be added intermittently, with a free residual
not to exceed 1 ppm – maintained for short
periods.
•
An atmosphere surrounding
the tower no worse than “moderate industrial”,
where rainfall and fog are no more than slightly
acid, and they do not contain significant chlorides
or hydrogen sulphide (H2S).
WARNING :
Water treatment must be supplied and / or applied by
a professional in the field in order to avoid fill damage.
It is the user's/ owner/s responsibility to treat the
water in order to stop biological contaminants and avoid
among other bacterium, the legionnella bacteria, which
is known to cause legionnaire disease.