STA-RITE SC-75 Guia De Instalacion página 5

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Flow Sensor: A flow sensor assures that there will always be adequate water flow through the SC-75. If the SC-75 is not
properly plumbed and/or does not receive adequate water flow, no chlorine will be produced.
Temperature Sensor: To protect the SC-75 from operation and potential damage when the temperature of the pool water
falls below 11° C, ±1.67° C, the temperature sensor switches the cell off, illuminates the COLD WATER light and no chlorine
will be produced.
Salt Sensor: Two (2) salt sensor probes in the SC-75 are activated each time the SC-75 is switched on and again during
every 12 hours of continuous running. At each of those times, the salt level LED indicator lights flash in a scrolling sequence
for two (2) minutes to indicate that the SC-75 is in analysis mode. After two (2) minutes, the LED indicators lights will signal
one (1) of three (4) salinity ranges. For more information, see "Salt Level Status LEDs".
Note: The salt sensor reading is within +/- 500 ppm accuracy.
SC-75 Power Center
The power supply is connected with the pool circulation pump electrical source so that the SC-75 only operates when the
pool pump is on. The Power Center should be mounted vertically on the wall up to three (3) meter away from the cell. The
Power Center contains the transformer, fuse, and connector to the cell. A fuse holder is mounted on the bottom of the Power
Center for additional protection. There are no other controls or lights on the Power Center. For information about installing
and proper use of the Power Center, see the "SC-75 Power Center Installation Guide" .
The SC-75 Power
Center does NOT
control the pump. The SC-75 Salt
Chlorinator only produces chlorine
when the pool pump is on.
Loop Plumbing Diagram
The SC-75 Salt Chlorinator is designed to operate with water flow rates from 5.7 m³/h to not exceed 24 m³/h. For flow rates
over 18 m³/h minute you must use a bypass loop (as shown below) for best chlorine production. Installations with flow
rates over 18m³/h include those that have in-floor cleaning systems or booster pumps. These systems MUST use a bypass
loop with the SC-75 with a flow control valve that assures that the flow through the SC-75 is maintained within its designed
operating water flow rates.
"UPWARD FLOW"
Bypass Loop
FLOW
IN
FLOW IN
Flow Control Valve
75 Salt Chlorinator to the Power
Center, first switch off the AC
power to the Power Center.
FLOW
OUT
NOT TO SCALE
VALVE
FLOW OUT
5
Before plugging or
unplugging the SC-

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