22
(percent of flow) required to maintain different concentrations with various
cooling ranges*:
* Range = Difference between hot water temperature and cold water temperature.
EXaMPLE:
700 GPM circulating rate, 18°F cooling range. To maintain 4
concentrations, the required blowdown is 0.458% or .00458 times 700
GPM, which is 3.2 GPM.
If fluid cooler is operated at 4 concentrations, circulating water will contain
four times as much dissolved solid as the makeup water, assuming none
of the solids form scale or are otherwise removed from the system.
When water treatment chemicals are added, they should not be in-
troduced into the circulating water system via the water collection
basin of the cooling tower. Water velocities are lowest at that point,
which results in inadequate mixing. An ideal location would be the
redistribution basin above the coil.
Belt Tensioning
See
Figure 1
and
Figure 2
for MH Fluid Cooler models MHF702 thru
MHF705. Loosen specified hardware located at the top and bottom of
the motor support assembly before adjusting the jacking screws.
Do not
remove the hardware—it is required to support the motor
. Tighten the
hardware after adjustment. Ideal tension is the lowest tension at which
the belt will not slip under peak load conditions. Check tension frequently
during the first 24-48 hours of run-in operation. Overtensioning shortens
belt and bearing life. Keep belts free from foreign material which may cause
slipping. Never apply belt dressing as this will damage the belt and cause
early failure. A Dodge
®
V-Belt Tension Tester is an alternate method for
tensioning V-belts. Check with you local belt supplier.
Maintenance
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Note
