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MAINTENANCE
Water Chemistry
(Continued)
Disinfecting
When filling the spa for the first time, follow the
purge/sanitizing instructions in the Equipment Set-Up
procedure of the Installation Instructions.
Add a disinfectant to the water on a regular basis to
help control the amount of bacteria, algae and organic
materials. Such bacterial contaminants, if not con-
trolled, could cause skin rashes or other physical prob-
lems. To disinfect the spa for normal use, first establish
the amount of chlorine or bromine to add and determine
how often you need to add it.
We recommend that you maintain a free chlorine
level of 2.0-5.0 ppm at all times except when you must
exceed that during the initial purge/sanitizing procedure
or during superchlorination (refer to Water Quality Defi-
nitions below). Superchlorinate your spa every two
weeks with heavy use. If using sodium dichlor, add one
heaping tablespoon for each 150 gallons of spa water.
Scrub the spa surfaces with this solution to remove any
oily deposits. This will ensure that any bacteria or algae
which are resistant to the normal disinfectant level are
killed. After adding the disinfectant, run the filter system
and allow the free chlorine level to return to the 2.0 to 5.0
ppm range before using the spa again.
Do not install a cover until the disinfectant level
is back to normal. High concentrations of chlorine
or bromine will damage metallic plated finishes if
the cover is in place.
WATER QUALITY DEFINITIONS
pH: A chemical term used in expressing relative acidity or
alkalinity in numeric values with 7.0 usually regarded as
neutral, and for purposes of this manual, indicating pure
water. From 7 to 0 indicates increasing acidity, and 7 to 14
indicates alkalinity.
PPM: Parts per million.
Free Chlorine: Chlorine that has not combined with other
chemicals and that is available to destroy bacteria in the spa
water.
Trichlor: A form of chlorine used in pool or spa water
treatment; usually supplied in tablet form. Not recom-
mended because of its higher acidic nature and slow
dissolving action. Prolonged contact with the spa shell may
bleach or permanently mark the shell.
Sodium dichlor: The type of chlorine that is recommended for
spa use, as it is available in fast dissolving granular form. It is
neither excessively acid nor alkaline in character and does
not readily dissipate in higher water temperatures.
Calcium Hypochlorite: A granular chlorine product that is
inexpensive and effective but not recommended because it
often tends to form calcium deposits on heater parts and
plumbing fittings and leaves an unattractive film on the spa
at the water line.
Sodium Hypochlorite: A liquid chlorine product that is
inexpensive and effective but not recommended because
the liquid is readily spilled onto the spa or a surrounding
area, causing permanent damage.
Total Alkalinity: The measure of the amount of alkaline
materials (such as carbonates, bicarbonates and hydrox-
ides) in the water. High alkalinity inhibits the effectiveness
of chemicals to change the pH. If the alkalinity of your spa
water is high (above 150 ppm), it is advisable to drain the
water from the spa and begin the balancing process over
again. Low total alkalinity (below 60 ppm) could be corro-
sive and damage your spa system.
Superchlorination: (Also referred to as shock treatment.)
The addition of an above-normal level of disinfectant to kill
any bacteria or algae that might have become resistant to
normal levels of disinfectant.
10
Summary of Contents for Whirlpool Spa
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