Model MC9200 - Controllers Brochure

Publication WTP/Ptrol/MC9210/08/04 Controller Specification Sheet MC9210AXXXBX Proportional Inhibitor Dosing and Conductivity Bleed Control PULSAtrol Controllers are microprocessor based units specifically designed for a wide range of water treatment control and monitoring options. PULSAtrol 9000 units offer ease of installation as the controller and standard flow assembly housing all the relevant sensors and flow switches is supplied pre-mounted on a polypropylene backboard. MC9210AXXXBX is designed to dose inhibitor, on a timed or proportional basis, and control bleed via conductivity control. The controller allows the optimum dosage regime to be maintained. Inhibitor or bleed is effected via a Selectable Timer which has “Percent”, and “Pulse” options. The standard unit has a number of upgrade options to enable it to perform additional functions. Key Features • Microprocessor based for accurate and reliable control • Modular flow assembly with flow switch, quick release sensors and sample port mounted on a polyethylene panel • Convenient keypad menu access, display contrast adjustment and Hand/Off/Auto relay control • Self charging capacitor to maintain time and history for up to two weeks in the event of power loss to the controller • DIN connections for conductivity sensor • Panel mounted assembly for ease of installation • Modular hardware and software for easy access and servicing • IP65 High Impact Resistant PVC enclosure for protection against harsh environments Operation • The treated water conductivity is continuously monitored by the integral conductivity cell in the Controller flow assembly which also incorporates a flow switch. The flow switch ensures that all the following controls are only activated when there is flow through the assembly. The range is selectable between 0 to 500, 2000, 5000, 10,000 and 20,000 microSiemen/cm. Factory setting is 5000 µS/cm. • The required “Set Point” (factory set at 1500 µS/cm) can be either “Rising” or “Falling” but in a cooling tower application would normally be “Rising”. • “Rising” or “Falling” relates to the natural tendency of the treated water. In a cooling tower the concentration of the circulating water will tend to rise. Thus if no concentrated water is bled to drain, the set point will be “Rising” as without any blowdown the conductivity will continue to rise. • When the set point is reached the solenoid blowdown valve is opened. • The solenoid valve will continue to be activated until the level falls below the set point by the “Differential” (factory set at 100 mS/cm) then the solenoid valve will close. This is to prevent chattering of the output relay about the set point. • A selectable timer is available to operate the inhibitor metering pump. Actuation can be by one of 4 modes; • limit; or “lockout” timer. The inhibitor pump is actuated simultaneously with blowdown as controlled by the conductivity reading. In this mode the timer limits the length of time the metering pump can run during any single blowdown cycle. This safeguards against overdosing should blockage occur in the blowdown line for example. The timer is adjustable in one minute increments up to 23 hours and 59 minutes with an elapsed time display. • percent; also referred to as a cycle timer. The timer runs continuously on an adjustable time cycle, such as ten minutes, with the output being activated for an adjustable percentage of the time cycle. The timer is adjustable in increments up to 100% and the cycle time is adjustable from one to 120 minutes. • pulse with accumulator; also referred to as water meter or reset timer. The timer accepts pulses from a water meter to actuate the inhibitor metering pump. The timer has an adjustable feed time (Run Time) in one second increments up to 59 minutes and 59 seconds with an elapsed time display. It has a built in accumulator that can count pulses up to 255 before activating the out put with an elapsed pulse counter. Also incorporated into the timer is a pulse totaliser that keeps an on-going count of the number of pulses received by the timer. • percent post blowdown; this timer is adjustable in one percent increments up to 100% of the blowdown time. The timer keeps track of the total blowdown time and activates the inhibitor metering pump, when the blowdown deactivates for the percent of the total blowdown time set. The minimum feed time will be one minute. • An alarm output relay is available to signal; • high Conductivity alarm set point (factory set to follow set point ± 200 µS/cm) • inhibitor metering pump limit timer reached (factory set at 1 hour 30 minutes) • low Conductivity alarm set point (factory set to follow set point ± 200 µS/cm) • no flow condition through flow assembly • An alarm dry contact is available to transmit common alarm status to a remote point. "Rising" Set Point Conductivity Control1000110012001300140015001600170018000 1 2 3 4 5 6 7 8 9 10TimeConductivityHigh AlarmSet PointDifferentialLow AlarmBlowdown ActivatedBlowdown De-Activated Cables Certain cables are supplied with the controller and flow assembly mounted on the backboard. • Sensor cables. All sensor cables are cut to the length required for installation into the provided flow assembly. • Flow Switch cables. All flow switch cables are cut to length required for installation into the provided flow assembly. • Communications cables. If the communications option is included, a 3 metre cable with a DIN connection on one end for plugging into the controller and a standard RJ-45 connection on the other end is supplied. If the communications option includes the modem, an RJ-45 to RJ-11 adaptor is supplied for connecting into a standard telephone jack. Additional Equipment Requirements The MC9210AXXXBX Controller is a stand alone unit. To operate as a complete system the following equipment must be in place – either existing or supplied in addition to the controller. • Dosage Pumps ? A dosage pump will be required for the inhibitor. Care must be taken to ensure that the pump is capable of delivering the chemical requirements specified by the controller. • Chemical Storage ? Treatment chemicals will normally be stored in a chemical storage tank. Dosage can be from the container that the chemical is supplied in, but it should be ensured that a means of monitoring usage is available. • Solenoid Valve ? A normally closed solenoid valve will be required for bleed control. • Impulse Water Meter ? An impulse water meter will be required, for the cooling tower make up line, to monitor the rate of make up flow into the cooling tower. The “K” factor, i.e. the volume of water passing through the water meter between impulses generated, will depend on the individual operating parameters. • Cables Depending on the options included in the relevant controller, certain cables are supplied separately to order. ? Water Meters – All water meters inputs are available from a single DIN on the controller. When you order a cable for water meters, one end is terminated with the mating DIN for connecting to the controller. The cable is 8-conductor twisted pair. The other end of the cable has no terminals. Colour-coded stripped leads are available for wiring to your specific water meter. ? Analogue (4-20mA) Outputs – All 4-20 mA outputs are available from a single DIN on the controller. When you order a cable for 4-20mA outputs, one end is terminated with the mating DIN for connecting to the controller. The cable is 8-conductor twisted pair. The other end of the cable has no terminals. Colour-coded stripped leads are available for wiring to your analogue output device. ? Volt-free contact Alarm – All volt-free contact alarm outputs are available from a single DIN on the controller. When you order cable for volt-free contact alarms, one end is terminated with the mating DIN for connecting to the controller. The cable is 8-conductor twisted pair. The other end of the cable has no terminals. Colour-coded stripped leads are available for wiring to your alarm input. Options The MC9210AXXXBX is the standard control unit to perform the tasks defined above. If additional features are required, the following options are available at additional cost. • A 4 - 20 mA recorder output is available to drive a chart recorder to provide hard copy of the measured Conductivity reading. • The PULSAworks communications package can be employed to provide remote or local accountability. Specification Feature MC9210AXXXBX MC9210 Selectable timer, alarm output relay, volt free contact alarm output, water meter totaliser, conductivity control with sensor and flow switch mounted in a flow assembly. Controller and flow assembly mounted on a polythene backboard. A “Conduit” which signifies cable gland connections on base of controller. X No additional timers. Varying the 8th digit calls up additional cost timer options. A = single 28 biocide timer, b = Dual 28 day biocide timer. X No analogue output. Varying the 9th digit calls up additional cost analogue I/O options. A = Single isolated 4 – 20 mA output. B = dual 4 – 20 mA outputs. X No remote communications. Varying the 10th digit calls up additional cost Communications options. A = Serial line communications including software. B = Internal modem communications including software. B CE approval X Standard panel with flow assembly Power input 90 to 250 VAC @ 50/60 Hz 100 VA Control Output Line Voltage @ 600 VA Display 2 x 16 Alpha Numeric, Back Lit Display Electronic Environment -17.8 to + 52oC, 100% Humidity Shipping Weight of Backboard, Controller and Flow Assembly (kg) 9.2 Maximum Backboard Width (mm) 520.7 Maximum Backboard Height (mm) 330.2 Circulating PumpHeat ExchangerDrainChemical 1 InhibitorAlarmCooling TowerMake Up WaterWater MeterSolenoid ValveDosage PumpsConductivity ProbeFlow SwitchSchematic Illustrating Typical Installation Arrangement for PULSAtrol MC9210AXXXBX Inhibitor Dosing and Conductivity Bleed Controller -Cooling Tower ApplicationY StrainerY StrainerUnionInput PowerController XInhibitor Dosage PumpRelay DJ121231 is Neutral2 is Earth3 is LiveJ12 - Power Input ConnectionsClarification of Terminal ConnectionsMother Board9 10 11 12 13 14 15 16All Equipment Must Be EarthedXItems marked thus are Input and Output devices to be connected by the Installer.It should also be understood that applications will vary such that not every item will always be supplied.Electrical Schematic Detailing Connections for MC9210AXXXBX1 32S-+Single Channel Chart Recorder1 432R B C SConductivity SensorFlow SwitchWater MeterMake Up FlowXN/OComVolt Free Alarm ContactsRelay BRelay CRelay DRelay ERelay FRelay GRelay HRelay IF2F2F2 F3 F4 F5 F6 F7 F8 F95A, 230V FusesBJ2CJ3DJ4EJ5FJ6GJ7HJ8IJ912341234123412341234123412341234J12123XPower Supply InBlowdown Solenoid valve, Relay CXAlarm Output, Relay IX3 is Earth4 is Neutral1 is Live (N/C)12342 is Live (N/O)Relay Connections12341234Pump or Solenoid Valve ConnectionsAlarm Output Relay