CHEMTROL PC6000 Programmable Chemical and Filter/Pump Integrated Controller
The CHEMTROL® PC6000 unifies water-chemistry control and plant automation in one panel—so pH, sanitizer (ORP or ppm with compatible sensors), pumps, filters, heaters, and valves all work in sync. It maintains stable setpoints with proportional/PID dosing and built-in overfeed protection, then coordinates equipment with programmable relays and interlocks to enforce safe sequences (pump proof, heater cooldown, flow/level checks). For filtration, the PC6000 supports automatic backwash on single or multi-filter systems using time, pressure-differential, or cumulative-flow triggers, complete with adjustable step timers and lockouts to pause chemistry feed during wash cycles.
Day to day, operators get clear front-panel status, audible/visual alarms, and event/data logging to document compliance and optimize chemical use. Integration is straightforward: drive peristaltic pumps or valves from relay outputs, feed trends to recorders or BMS via analog (4–20 mA) / dry contacts, and enable remote supervision where equipped to review readings and tweak setpoints without a site visit. The result is predictable water quality and repeatable plant behavior—ideal for high-load pools, spa banks, aquatic centers, and institutional facilities that can’t afford downtime.
Key highlights
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Unified controller for chemistry (pH + sanitizer) and filtration/pump/heater automation
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Proportional/PID dosing with dose limits, feed lockouts, and safety interlocks
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Automatic backwash (time, ΔP, or flow) for single or multi-filter systems with step timers
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Programmable relays, alarm contacts, and 4–20 mA outputs for pumps, valves, VFDs, and BMS
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On-panel alarms, event/history logs, and optional remote supervision for oversight and compliance
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Pauses chemical feed during backwash; supports pump proof, heater enable/fireman, and flow/level safeguards
Exclusive PC6000 Features
| Feed Control | Manual, ON/OFF, Proportional Feed, Timer |
| Calibration | 1, 2 or 3 points |
| Langelier Index | Scaling and corrosion alert |
| Shock Program | Superchlorination and dechlorination |
| Savings | Chemical and energy saver programs |
| Failure Analysis | Dynamic Probe Testing with sensor failure warning for ORP and pH |
| Data Logging | On-board memory for 1,000 tests |
| Data Printing | Real-time with data logging or downloading from storage memory |
| Units | US and metric systems |
| Passwords | Security protection with ten 5-digit codes with 3 different access levels |
| Clock | 24-hour universal clock/calendar |
| Battery | Maintains all settings in case of power shutdown |
| Warranty | Five (5) years warranty on PC boards |
PC6000 Technical Specifications
- ORP readout in millivolts with programmable oxidizer feed control
- pH readout with programmable acid and base feed controls
- Temperature readout in degrees Fahrenheit or Celsius with programmable heater control
- Bypass line with in-line filter, flow meter, safety flow switch, two control valves and sampling valve
- Sensor cleaning with programmable acid wash control
- Remote alarm (hot or dry contacts)
- Conductivity readout in microsiemens and TDS readout in ppm or mg/l with programmable dump valve control
- Programmable Feed Control for three (3) chemical additives
- Electronic Water Level Sensor with automatic fill valve control
- Flow Sensor with saddle clamp mount
- Seven-day main pump program
- Two (2) pressure sensors (influent and effluent) in psi or kg/cm2
- Six (6) relays for programmable sequential filter backwashing
- Data/Voice/Communication Modem
- CHEMCOM® remote computer software for Windows
- Remote Telephone Control of activator modes
- Telephone Alarm Callouts to six(6) memory-stored numbers
- Rain and splatter proof NEMA Type 3R fiberglass cabinet.
Options
- OPTION PPM: PPM Sensor for Free Chlorine
- OPTION ETHCOM: Full duplex remote computer operation with Ethernet / Web-access communication.
- OPTION 420M: 4-20mA signal (4-channels) for monitoring display outputs.
- OPTION BMS: Modbus/BACnet-protocol communication for Building Management Systems.
PC6000 OPERATION
The Main Display Screen of the CHEMTROL® programmable controller gives direct access to all the menus and submenus. Navigation between the menus and inside the menus is easily accomplished with the four directional arrow keys. The numerical settings can be changed with the ten-key keypad.
The ORP MENU includes selection of the control mode (Off, Manual, Auto or Timer), sensor calibration (1, 2 or 3 points), setpoint level, high and low alarms, shocking and chemical saver programs. It also displays the run time for the current feed event and cumulative run time. Shock treatment can be initiated manually or under programmable weekly or multi-weekly schedules.
The SANITIZER MENU is used to control the chlorine or bromine level in terms of sanitizer concentration (parts per million or milligrams/liter), obtained by conversion from ORP and pH values using a proprietary algorithm or from an amperometric sensor. The sanitizer concentration readings can be calibrated to account for the effect of cyanuric acid stabilization. Superchlorination can be initiated manually or under programmable weekly or multi-weekly schedules.
The pH MENU is used in the same way to select the pH control parameters using either acid or base feed or both. It also includes an Acid Wash program for periodic injection of an acid rinse solution to clean the heads of the sensors.
SATURATION and WATER BALANCE: Proper control of saturation and water balance is required to maintain water quality and to avoid the development of scaling or corrosive conditions.
The TDS MENU is used to set automatic dumping (bleeding) of water when the dissolved solid concentrations becomes too high, selecting either a Conductivity or a TDS control setpoint to activate the dump valve. Backfilling of water is done simultaneously with a level control activated valve.
The Langelier Index calculates the saturation condition from the pH and Temperature sensor inputs and from manual data entry for Alkalinity and Calcium Hardness. The water saturation condition is constantly displayed on the Main Screen as either “OK”, “Scaling” or “Corrosive” using standard Langelier Index limits. If a scaling or corrosive condition develops, it is immediately indicated with a flashing display on the Main Screen. “What if” analyses can be run at any time by manually entering different values for alkalinity, calcium hardness, pH and temperature.
TEMPERATURE / HEATER CONTROL: Temperature Sensor readings are displayed either in degrees Fahrenheit or Celsius and used to control the heater. The TEMPERATURE MENU is used to set the heater control to Manual or Automatic using a programmable seven-day schedule with separate daily ON and OFF times. The energy saver program is used to lower the water temperature during hours when the facility is not in use, thereby realizing substantial savings on heating costs.
PUMP AND FILTER CONTROL: Filtration control includes manual or programmable operation of the main recirculation pump and backwashing cycle using data input from the flow sensor and from the influent and effluent pressure sensors. With the PUMP MENU, the main recirculation pump can be set to Manual for continuous 24-hour operation or to Automatic with a seven-day schedule. Protection of the heater is assured with the adjustable fireman delay to allow for cooldown of the heater before water recirculation is stopped. The FILTER MENU is used to program the backwash schedule based on time cycle or on pressure differential. Multiple filters are backwashed in sequence with adjustable backwash and advance time for each filter.
The SETUP MENU is used to modify the configuration parameters for initialization, operations and communications from their initial default values. These values can be changed at any time or restored to the original default values.