Hayward CAT 3500 CAT 3500 Owners Manual - Page 4

What's Included Description The following is a description of the components incorporated in a typical CAT 3500 water quality control system: The Professional-Series pH Sensor samples water from the filtration system and sends signals to the controller indicating the acidity of the water. The ideal pH range for pools and spas is 7.4 - 7.6. The CAT 3500 controller is preset from the factory to maintain pH 7.5. If pH is maintained below 7.4 (too acidic), eye irritation, corrosion of equipment, and damage to the pool or spa surface can occur. If pH is maintained above 7.6 (too alkaline), sanitizer activity is reduced, water may become cloudy, and eye irritation may result. The Professional-Series ORP Sensor samples water from the filtration system and sends signals to the controller indicating the oxidation-reduction potential (redox) of the water. ORP is an actual measure of sanitizer activity (chlorine, bromine, ozone, etc.) and bacteriological water quality rather than an expression of chemical residual levels. The CAT 3500 controller is preset from the factory to maintain ORP at 650 millivolts. The Flow Sensor monitors the rate of flow across the pH and ORP sensors and signals the controller to disable automated chemical feeding during periods when the filtration system is off or low recirculation flow is detected. The Flow Cell provides a convenient location for mounting the pH, ORP and Flow sensors while ensuring ideal hydraulic conditions to maximize sensor performance and life. The CAT 3500 Controller scans and interprets the signals from the pH, ORP, flow, and optional digital flow-rate and level sensors, displays water quality readings and alarms in alphanumeric format, and activates chemical feeders in proportion to demand to maintain pH and ORP setpoint levels. The controller incorporates audible and visual safeguard alarms for out of range conditions and menu-driven control of setpoints, alarms, and a host of advanced features. The Level Sensors (optional) provide signals to the controller indicating low pH chemical tank level, low ORP tank level, and low water level. The Digital Flow Sensor (optional) provides a flow rate to be displayed by the controller and an alarm indication when filter maintenance is required. Package Contents: (1) CAT 3500 Water Quality Controller (1) PVC Backboard with Mounting Holes and Stainless Hardware (1) Professional Series pH Sensor with 24" Cable and BNC Connector (1) Professional Series ORP Sensor with 24" Cable and BNC Connector (2) Sensor Storage Containers (1) Injection Molded Flow Cell (3) 1/4" NPT x 3/8" Tubing True-Seal Ball Valve (1) Flow Switch with 24" Cable and Specialty Connector (1) Temperature Sensor with 10' Cable and Specialty Connector 3 USE ONLY HAYWARD GENUINE REPLACEMENT PARTS