Hayward W3H400FDP HCC-2000-Automated-Controller-Owners-Manual-092460RevG - Page 8

Pool Chemistry Now that your new controller has been physically installed, water chemistry should be tested and adjusted prior to initiating automated control of the pool or spa. Confirm that your pool or spa water conforms to the following ranges before powering on and setting up the HCC 2000. The table below indicates generally accepted guidelines. Always maintain water chemistry according to standards set by your local or State Health Department. Test Minimum Ideal Maximum pH 7.2 7.5 7.8 Free Chlorine (PPM) 1 2 3 Bromine (PPM) 2 3 4 Cyanuric Acid (PPM) 0 - 100 ORP (mV) 650 - - Total Alkalinity 80 - 120 Calcium Hardness 200 - 400 Hayward water quality controllers maintain sanitizer levels (chlorine, bromine, ozone, etc.) based on ORP. Although ORP is a superior index of water quality compared to part per million sanitizer residual levels, factors such as pH, cyanuric acid concentration and total dissolved solids can affect sanitizer residual readings relative to ORP. Hayward strongly recommends establishing desired pH, sanitizer residual, calcium hardness, total alkalinity, temperature and cyanuric acid levels prior to initiating automated control of the pool or spa. The ORP setpoint will need to be changed periodically as described later in this section if the goal is to provide consistent sanitizer residual levels rather than consistent control of ORP. 7 USE ONLY HAYWARD GENUINE REPLACEMENT PARTS