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PC2000 BID SPECS

 

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The following engineering specifications are recommended to architects and engineers for preparation of their Requests for Bids.  In addition to this page, several formats are offered so that they can be easily printed directly on a printer (Acrobat Reader format) or inserted directly into bid documentations using the most common word processors.

 

INVITATION FOR BID

SECTION -SWIMMING POOL WATER CHEMISTRY CONTROL

1.01 SUMMARY

A. A PROGRAMMABLE CHEMICAL AUTOMATION SYSTEM shall be supplied for continuous monitoring and control of pH and sanitizer ORP (oxidation-reduction potential). The controller shall also display the Langelier saturation index. The controller shall include a programmable microprocessor with a four (4)-line display screen and a sixteen (16)-key keyboard for operator access.

B. The system shall be a CHEMTROLTM PC2000 PROGRAMMABLE CONTROLLER of current design and model manufactured by SANTA BARBARA CONTROL SYSTEMS of Santa Barbara, California or a technically equal system certified by the specifying agent as capable of providing equal performance for all operating functions.

C. Exceptions to the specifications shall be described in detail together with a list of ten (10) similar operating systems of same model and manufacture, with the name, address and telephone number of operating personnel.

1.02 SPECIFICATIONS

A. CHEMISTRY CONTROLLER

1. The controller shall automatically activate the appropriate chemical feeders in order to maintain the sanitizer activity level within +/- 10 mV (millivolts) of ORP and the pH within +/- 0.1 pH unit of the setpoints selected by the operator. ORP function shall include a seven-day, level-based chemical saver program. All setpoint and calibration levels shall be adjustable with a numeric keypad mounted on the front panel of the unit. Controllers with internal switches or calibration adjustments and/or requiring special signal generating equipment to service will not be considered equal.

2. The controller shall be capable of operating all outputs in the following operator-selectable modes of operation: automatic, manual, timer or off. In the automatic mode, the operator shall be able to choose between on/off control with adjustable deadband or proportional feed control with adjustable deadband and progressive control zones.

3. The controller shall include a programmable seven-day shock program with operator selectable ON and OFF times for each day of the week.

4. The controller shall include automatic control of a chemical feeder for Automated Chloramine Treatment (A.C.T.)

5. The controller shall continuously calculate and display the Langelier Saturation Index using either sensor data and/or manual input for pH, temperature, total alkalinity and calcium hardness. The resulting calculated water condition shall be displayed on the main screen as either "Scaling", "Corrosive" or "OK".

6. The controller shall be contained in a NEMA Type 4X (rain and splash proof) lockable fiberglass cabinet with an LCD graphic display screen of four (4) lines of twenty (20) alphanumeric characters each. The main display screen shall show the current values, control mode and operational status for ORP, and pH. Controllers with smaller displays or displays that require scrolling through menus will not be considered equal. All screens shall have the capability of being displayed at any time at the option of the operator in unabbreviated English, French or Spanish and in US or metric units.

7. The controller shall be factory set to water treatment industry standards. The operator shall be able at any time to adjust all programmable functions to preferred settings. The controller shall have a reset mode to reset all or selected functions to the original factory standards.

8. The controller shall have the capability to calibrate all sensor inputs, depending on the accuracy needed, using either 1, 2, or 3-point calibration to determine respectively the origin, slope and curvature of the calibration curve.

9. The controller shall include programmable high and low alarm levels for all control functions with operator-selectable feed lockout and alarm buzzer options. A Remote Alarm relay shall be included in parallel with alarm buzzer for operator-selectable voltage or dry contact output.

10. The controller shall continuously monitor and alert for failure of ORP and pH probes using dynamic probe testing before the water chemistry gets out of range. Failure alarms based on safety timers or out-of-range alarms will not be considered equal.

11. The controller shall record and display the elapsed run time for each activation event and a cumulative run time resettable at any time by the operator. The controller shall provide for operator-adjustable event run time limits and total run time alarms for all control functions.

12. The controller shall include a battery for memory storage with minimum reserve power for six (6) months.

13. The controller shall have an on-board memory for storing of test data on operator-selectable schedules. RS-232 serial communications port shall be included for on-site downloading of test data. Test data storage must consist of the following sensor inputs: ORP, pH (PPM, Temperature, Conductivity or TDS available with optional sensors). Controllers failing to data log all listed parameters will not be considered equal.

 

B. OPTIONS

1. OPTION TEMP: The controller shall include an electronic temperature sensor to monitor and display the water temperature in degrees Fahrenheit or Celsius with adjustable high and low alarms.

2. OPTION TDS2: The controller shall include a conductivity/temperature sensor for display of TDS in parts per millions or conductivity in microSiemens/cm. It shall automatically control a water dump valve for automatic purging of saturated water, or injection of a saline solution in for use with salt chlorine generator. The controller shall also monitor and display the water temperature in degrees Fahrenheit or Celsius with adjustable high and low alarms.

3. OPTION PPM2: The controller shall calculate and display the concentration of sanitizer in PPM (parts per million) of free chlorine. The Sanitizer function shall include 1-, 2-, and 3-point calibration, as well as high and low alarms with alarm buzzer options.

4. OPTION TEMP2: The controller shall include an electronic temperature sensor to monitor and display the water temperature in degrees Fahrenheit or Celsius with adjustable high and low alarms. The controller shall include automatic control of the heater with a seven-day energy saver program.

5. OPTION FCA: The ORP and pH shall be mounted in a see-through flow cell with a clear cover, pre-assembled with a water spigot and (2) ball valves [Sch 80 PVC]. Optional Temperature and TDS sensors will be mounted on corner Tee inline with see-through flow cell.

6. OPTION SCA: The ORP and pH sensors shall be mounted in a see-through flow cell with a clear cover located inside a lockable fiberglass enclosure with a window. Optional Temperature and TDS sensors will be mounted on corner Tee inline with flow cell.

7. OPTION BPL: A bypass line for installation of the sensors shall be provided with an in-line filter, a flowmeter, a safety flow switch, a sampling valve for water testing, and two flow control valves.

8. OPTION REM2: The controller shall include remote computer communication by modem capable of representing the actual controller screen display on a PC-compatible computer and automatic programmable downloading of test data for multiple facilities via telephone lines. Controllers using simulation or virtual representation of the display screen shall not be considered equal.

9. OPTION ETHCOM2: The controller shall include an Ethernet / Internet modem for remote operation by PC-compatible computer using Ethernet / Internet network communication. A Windows-based software program shall be supplied with true duplex operation capability representing the actual controller screen display with automatic downloading and visual graphics representation of test data. Controllers using simulation or virtual representation of the display screen shall not be considered equal.

10. OPTION RS485: The controller shall include a communication converter and RS485-based multiplex communication for remote operation by PC-compatible computer linked directly to the controller. A Windows-based software program shall be supplied with true duplex operation capability representing the actual controller screen display with automatic downloading and visual graphics representation of test data. Controllers using simulation or virtual representation of the display screen shall not be considered equal.

11. OPTION MULTI2: The controller shall include RS485-based multiplex communication for networking with up to thirty (30) controllers and remote operation through a host controller using options REM, ETHCOM or RS485.

12. OPTION MODBUS2: The controller shall include software-based conversion of sensor signals, setpoint, high & low alarms, cummulative run time and total feed time for ORP, pH, PPM, Temperature, (Conductivity, Pressure influent and effluent, and Flow available with optional sensors) into MODBUS protocol for monitoring on Building Management Systems. The controller shall also allow MODBUS writing for changing control modes and setpoints from Building Management Systems.

13. OPTION PRINTER: A 110V or 230V (specify) 40-column thermal printer with an RS-232 connection cable shall be provided for on-site printing of test data stored in the controller memory.

 

C. WARRANTY

1. The controller shall be covered by a standard manufacturer warranty of five (5) years. Special extensions of more limited warranties shall not be considered acceptable. All sensors will be covered by a standard one (1) year warranty. Other parts shall be covered by their own manufacturer's warranty. The controller shall not require a service technician for annual calibration, seasonal start up, or whenever chemicals supplier or type are changed.

2. The manufacturer shall supply a complete instruction, operating and maintenance manual. Check-out of installation, start up, and instruction of operating personnel shall be performed by an authorized and properly trained manufacturer representative.

 

CHEMTROL_PC2000_spec - 11/2002