User manual

25
a treatment schedule will be in the range of 2-4 concentrations. The following
table shows the minimum amount of blowdown (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
introduced into the circulating water system via the water collec-
tion 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.
Any bolts removed functioning as mechanical or structural hard-
wareshouldbereplacedwiththetorquesspeciedbelow.
Maintenance
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)C°87.2(F°5 87.83.52.81.11.80.60.
)C°65.5(F°01 85.187.15.83.52.81.41.
)C°33.8(F°51 83.2 81.187.85.83.82.22.
)C°11.11(F°02 81.3 85.1 50.187.15.83.03.
)C°98.31(F°52 89.3 89.1 23.189.46.84.83.
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Note
Fastener Torque Values
Machine Bolt
Size
Galvanized Stainless
ft·lb
ƒ
N·m ft·lb
ƒ
N·m
8mm 8 10 15 20
10mm 15 20 30 40
12mm 25 35 50 65
16mm 65 85 120 160
20mm 125 170 230 315
Caution