Polaris Watermatic C-660, User Manual, Page: 11 / 31

2. Check for leaks and correct as necessary.
3. Set the ORP set knob (#5 on page 14) to minimum (counter-
clockwise).
4. Hold in the pH set button (#4 on page 14) and adjust the pH
set knob (#15) to maximum (clockwise) if in the base feed
mode (see B on page 8) or minimum (counterclockwise) if in
the acid feed mode.
5. Turn on the power switch. The red power indicator light and
the digital display will activate.
Note: If the ORP and pH lights are illuminated but the power
light is not, there is no flow or pressure and the feed cycles
are inactive. If the flow or pressure switches are not being
used and the power light is off, the flow jumper is not in
place
6. Using a DPD test kit, manually adjust the pool water to the
desired sanitizer and pH levels.
Leave the power switch on.
F. pH Level Settings
1. Prior to setting the desired pH level, the pH sensor must be
calibrated. To do this, the pH sensor must be in a known pH
solution that is near 7.5. If the pH sensor is installed in a
bypass or flow cell with a sample port, test the water from
the sample port. If it is installed in a position where the
direct water that the sensor is sitting in cannot be tested,
place the sensor in a glass of pool water.
Calibrate the sensor to the reading using the calibration
knob. The pH sensor should be calibrated every 4 to 8
weeks.
2. Hold in the set button and turn the pH set knob until the
desired pH level appears in the display. Acceptable levels
are 7.2 to 7.8.
3. Allow the system to operate for 24 hours. With the filtration
system running, retest the pool water pH using a test kit and
adjust the pH set knob if necessary.
4. Adjust the pH feed system for a feed rate that is not too low
or too high. Due to the lag time between the beginning of
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