Operating The Salt Chlorinator; Initial Startup Period; If You Use A Pool Pump Timer - Pentair STA-RITE SC-75P Installation Manual

Section 3
Operating SC-75™ Salt Chlorinator
This section describes the startup procedure and operating instructions for SC-75 Salt Chlorinator.
Before starting up and operating SC-75, the pool in which the SC-75 will be used must have been completed and filled with
water for at least one (1) month (for plaster pools) and the pool water salt level must be stable and being maintained at
3.300 to 3.600 ppm.

Initial Startup Period

For the first thirty (30) days of cell operation, the self-cleaning cycle, is factory set to two (2) hours. After thirty (30) days has
elapsed, SC-75 will automatically set itself to three (3) hour self-cleaning cycle. This feature will clean the SC-75 blades more
often during the initial installation, then go to a more standard self- cleaning cycle for longer blade life.
Operation
Use of an external Pool Pump Timer is not required
The SC-75 is designed to supply a sufficient amount of chlorine to sanitize pool water on a daily basis. If the pool pump is
continuously running and the SC-75 is operated 24 hours a day at 100%, more chlorine would be generated than would be
needed by most pools (2-4 ppm, per APSP recommendations). The SC-75 has its own internal timer which cycles the electrolytic
cell on and off depending on what percent the Sanitizer Output is set.
The SC-75 is designed only to produce chlorine. The SC-75 does not monitor or control chlorine levels in the
pool or spa water. It is the pool owner's responsibility for monitoring and maintaining free chlorine levels at
2.0 to 4.0 parts per million (ppm) according to APSP recommendations. It is the pool owner's responsibility to check the free
chlorine level while the pool pump is running on a regular basis, and adjust the Sanitizer Output on the SC-75 accordingly.
Before attempting to operate SC-75 refer to "General Recommendations and General Cautions", at the end
of this section, and "Pool Water Preparation" in previous section. Also, do not adjust Sanitizer Output above
20% until it is certain that salt has been dissolved in your pool. Operating without salt will result in the unit turning off and
lighting the ADD SALT light on the salt display. No chlorine will be produced until salt is added to the pool.

If you use a Pool Pump Timer

The Association of Pool and Spa Professionals (APSP) recommends that all water in a residential pool pass through the
filtration system at least once every 24 Hours (referred to as pool water turnover). However, many factors have an effect on
actual pump and filter system run times. Pool size, source of water, direct sun light, indoor/outdoor, screened/unscreened,
filtration system, cold or hot weather, swimmer load, rain, organic debris, algae, etc., are all factors which contribute to either
more or less pool pump and filter system run times. Because of these differences, it is extremely difficult to set a standard
initial run time (starting point) for the pool pump and chlorinating system.
Try initially setting the pool pump timer to twelve (12) hours. It will take a few days to achieve the correct amount of pool
pump operating time. When SC-75 is wired with a pool pump timer, results will vary greatly from one pool installation to the
next, so this should be discussed with your pool professional. The key points are:
• Operate the pool pump at least the minimum time needed for good filtration and adequate chlorine production by the
SC-75, according to your pool professional's recommendations.
• While pool pump timers can reduce energy consumption, the pool pump must be running for the SC-75 Salt Chlorinator to
provide chlorine and must remain running long enough to maintain proper chlorine levels (i.e., 2.0 - 4.0 ppm of free available
chlorine).
Note: Exception - For Cold Weather Operation: The unit turns off in water temperatures below 12° C, and will not produce
chlorine. This feature extends the life of the cell.
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