USE ONLY HAYWARD GENUINE REPLACEMENT PARTS
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1. Press and hold the Hidden Button (#1) for five seconds to enter advanced setup mode.
2. Scroll to pFD and press the enter key. Scroll to select A for acid feed or B for base feed.
Press the Enter key to set your selection, then press the Hidden Button (#1) again to
return to normal operating mode.
As the unit powers on, the digital pH readout will display an “A” or “B” indicating whether acid feed
or base feed mode has been activated.
Calibrating pH
Readings from the CAT 2000 are far more accurate than those obtained from most liquid test stan-
dards. To match manual water testing results or compensate for a depleted or unclean pH sensor,
the pH channel of the controller may be calibrated as follows:
1. Press the pH Setpoint Adjustment Button (#4) twice, illuminating the green “CALI-
BRATE” LED.
2. Press the arrow-shaped pH Channel Increase Button (#2) or pH Channel Decrease
Button (#3) until the digital display matches your manual pH test reading.
3. The controller will automatically return to the normal operating mode after twenty sec-
onds, storing any changes.
Changing the pH Setpoint
The CAT 2000 is preset from the factory to maintain pH at 7.5. To set pH control at a different
level, perform the following:
1. Press the pH Setpoint Adjustment Button (#4) until the green “SET” LED is illuminated.
2. Press the arrow-shaped pH Channel Increase Button (#2) or pH Channel Decrease
Button (#3) until the digital display matches your desired pH control level.
3. The controller will automatically return to the normal operating mode after twenty sec-
onds, storing any changes.
Changing the ORP Setpoint
The CAT 2000 is preset from the factory to maintain ORP at 650 mV. This is the generally ac-
cepted world standard for safe drinking water. In order to meet Health Department standards for
a particular pool or spa, the ORP setpoint may be changed to maintain a desired sanitizer level by
performing the following:
1. Manually test pool or spa to confirm that the current sanitizer reading (chlorine, bromine,
etc.) is the level you wish to maintain.
2. Note the ORP reading displayed by the controller.
3. Press the ORP Setpoint Adjustment Button (#8) until the green “SET” LED is illumi-
nated.
4. Press the arrow-shaped ORP Channel Increase Button (#6) or ORP Channel Decrease
Button (#7) until the digital display matches the ORP reading previously noted.
5. The controller will automatically return to the normal operating mode after twenty sec-
onds, storing any changes.
The ORP setpoint should be changed as needed to maintain sanitizer residuals in conformance
with Health Department standards.
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