WCT/WBLW100 Series - Walchem
WCT/WBLW100 SeriesCooling Tower and Boiler ControllerInstruction ManualFive Boynton Road Hopping Brook Park Holliston, MA 01746 USATEL: 508-429-1110WEB: www.walchem.com
Notice 2021 WALCHEM, Iwaki America Incorporated (hereinafter “Walchem”)5 Boynton Road, Holliston, MA 01746 USA(508) 429-1110All Rights ReservedPrinted in USAProprietary MaterialThe information and descriptions contained herein are the property of WALCHEM. Such information and descriptionsmay not be copied or reproduced by any means, or disseminated or distributed without the express prior written permission of WALCHEM, 5 Boynton Road, Holliston, MA 01746.This document is for information purposes only and is subject to change without notice.Statement of Limited WarrantyWALCHEM warrants equipment of its manufacture, and bearing its identification to be free from defects in workmanshipand material for a period of 24 months for electronics and 12 months for mechanical parts and electrodes from date ofdelivery from the factory or authorized distributor under normal use and service and otherwise when such equipment isused in accordance with instructions furnished by WALCHEM and for the purposes disclosed in writing at the time of purchase, if any. WALCHEM’s liability under this warranty shall be limited to replacement or repair, F.O.B. Holliston, MAU.S.A. of any defective equipment or part which, having been returned to WALCHEM, transportation charges prepaid,has been inspected and determined by WALCHEM to be defective. Replaceable elastomeric parts and glass componentsare expendable and are not covered by any warranty.THIS WARRANTY IS IN LIEU OF ANY OTHER WARRANTY, EITHER EXPRESS OR IMPLIED, AS TO DESCRIPTION, QUALITY, MERCHANTABILITY, FITNESS FOR ANY PARTICULAR PURPOSE OR USE, OR ANY OTHERMATTER.180530 Rev. U December 2021
Contents1.0 INTRODUCTION 12.0 SPECIFICATIONS 22.12.22.32.4Measurement Performance 2Electrical: Input/Output 3Mechanical 4Variables and their Limits 53.0 UNPACKING & INSTALLATION 63.13.23.33.43.5Unpacking the unit 6Mounting the electronic enclosure 7Installation 7Icon Definitions 10Electrical installation 104.0 FUNCTION OVERVIEW 234.14.24.34.44.54.6Front Panel 23Display 23Keypad 23Icons 23Startup 25Shut Down 305.0 OPERATION 315.1 Alarms Menu 315.2 Inputs Menu 315.2.15.2.25.2.35.2.45.2.55.2.6Contacting Conductivity 33Electrodeless Conductivity 33Temperature 34DI State 34Flow Meter, Contactor Type 35Flow Meter, Paddlewheel Type .105.3.115.3.125.3.135.3.145.3.155.3.16Relay, Any Control Mode 36Relay, On/Off Control Mode 36Relay, Flow Timer Control Mode 37Relay, Bleed and Feed Control Mode 37Relay, Bleed then Feed Control Mode 37Relay, Percent Timer Control Mode 38Relay, Biocide Timer Control Mode 38Relay, Alarm Mode 39Relay, Time Proportional Control Mode 40Relay, Intermittent Sampling Control Mode 40Relay or Analog Output, Manual Mode 41Relay, Pulse Proportional Control Mode 41Relay, Dual Set Point Mode 41Relay, Probe Wash Control Mode 42Analog Output, Retransmit Mode 43Analog Output, Proportional Control Mode 435.3 Outputs Menu 36
5.3.17 Analog Output, Flow Proportional Mode 445.4 Settings Menu 455.4.15.4.25.4.35.4.45.4.5Global Settings 45Security Settings 45Display Settings 45File Utilities 45Controller Details 466.0 MAINTENANCE 476.1 Conductivity Sensor Cleaning 477.0 TROUBLESHOOTING 487.1 Calibration Failure 487.1.17.1.2Contacting Conductivity Sensors 48Electrodeless Conductivity Sensors 487.2 Alarm Messages 498.0 SERVICE POLICY 529.0 SPARE PARTS IDENTIFICATION 53
1.0 INTRODUCTIONThe Walchem WCT/WBL100 Series controllers offer a high level of flexibility in controlling cooling tower and boilerwater treatment applications.One sensor input is available that are compatible with a variety of sensors:Cooling tower, boiler, and low cell constant condensate contacting conductivityElectrodeless conductivityTwo digital inputs may be used for a variety of purposes:State type: Flow switch or other Interlock to stop control, or drum level switchWater meter contactor: To control a relay to feed a chemical based on flow totalPaddlewheel flowmeter: To control based on flow total or flow rateThree relay outputs may be set to a variety of control modes:On/Off set point controlBleed or Feed based on a Water Contactor or Paddlewheel flow meter inputFeed and BleedFeed and Bleed with LockoutFeed as a percent of BleedFeed as a percentage of elapsed timeDaily, Weekly, 2-week or 4-week Biocide timers with pre-bleed and post-add lockout of bleedIntermittent sampling for boilers with proportional blowdown, controlling on a trapped sampleTime Proportional controlAlways on unless interlockedDual set pointProbe Wash timerDiagnostic Alarm triggered by:High or Low sensor readingNo FlowRelay output timeoutSensor errorAn optional isolated analog output may be included to retransmit sensor input signals to a chart recorder, data logger,PLC or other device.Our unique USB features provide the ability to upgrade the software in the controller to the latest version.1
2.0 SPECIFICATIONS2.1Measurement Performance0.01 Cell Contacting ConductivityRange0-300 µS/cmResolution0.01 µS/cm, 0.0001 mS/cm, 0.001 mS/m, 0.0001 S/m, 0.01 ppmAccuracy 1% of reading or 0.01 µS/cm, whichever is greater0.1 Cell Contacting ConductivityRange0-3,000 µS/cmResolution0.1 µS/cm, 0.0001 mS/cm, 0.01 mS/m, 0.0001 S/m, 0.1 ppmAccuracy 1% of Reading or 0.1 µS/cm, whichever is greater1.0 Cell Contacting ConductivityRangeResolutionAccuracy10.0 Cell Contacting ConductivityRangeResolutionAccuracy0-30,000 µS/cm1 µS/cm, 0.001 mS/cm, 0.1 mS/m, 0.0001 S/m, 1 ppm 1% of Reading or 1 µS/cm, whichever is greater1,000-300,000 µS/cm10 µS/cm, 0.01 mS/cm, 1 mS/m, 0.001 S/m, 10 ppm 1% of Reading or 10 µS/cm, whichever is greater100Ω RTD TemperatureRangeResolutionAccuracy23 to 500 F (-5 to 260 C)0.1 F (0.1 C) 1% of Reading or 1 C, whichever is greater1000Ω RTD TemperatureRangeResolutionAccuracy23 to 500 F (-5 to 260 C)0.1 F (0.1 C) 1% of Reading or 0.3 C, whichever is greater10k or 100k ThermistorTemperatureRange23 to 194 F (-5 to 90 C)Resolution0.1 F (0.1 C)Accuracy 1% of Reading or 0.3 C, whichever is greaterElectrodeless ConductivityRanges500-12,000 µS/cm3,000-40,000 µS/cm10,000-150,000 µS/cm50,000-500,000 µS/cm200,000-2,000,000 µS/cmResolution1 µS/cm, 0.01 mS/cm, 0.1 mS/m, 0.001 S/m, 1 ppm1 µS/cm, 0.01 mS/cm, 0.1 mS/m, 0.001 S/m, 1 ppm10 µS/cm, 0.1 mS/cm, 1 mS/m, 0.01 S/m, 10 ppm10 µS/cm, 0.1 mS/cm, 1 mS/m, 0.01 S/m, 10 ppm100 µS/cm, 0.1 mS/cm, 1 mS/m, 0.1 S/m, 100 ppm2Accuracy 1% of reading 1% of reading 1% of reading 1% of reading 1% of reading
Temperature C010152025303540506070Range 355.648.9Temperature C8090100110120130140150160170180Range 22.9Note: Conductivity ranges above apply at 25 C. At higher temperatures, the range is reduced per the range multiplier chart.2.2Electrical: Input/OutputInput PowerInput SignalsContacting ConductivityElectrodeless ConductivityTemperatureDigital Input Signals (2):State-Type Digital InputsLow Speed Counter-TypeDigial InputsHigh Speed Counter-TypeDigial InputsPowered Mechanical Relays(0 or 3 depending on modelcode):100 to 240 VAC, 50 or 60 Hz, 7 A maximumFuse: 6.3 A0.1, 1.0, or 10.0 cell constantOR100 or 1000 ohm RTD, 10K or 100K ThermistorElectrical: Optically isolated and providing an electrically isolated 9V power with anominal 2.3mA current when the digital input switch is closedTypical response time: 2 secondsDevices supported: Any isolated dry contact (i.e. relay, reed switch)Types: InterlockElectrical: Optically isolated and providing an electrically isolated 9V power witha nominal 2.3mA current when the digital input switch is closed 0-10 Hz, 50 msecminimum widthDevices supported: Any device with isolated open drain, open collector, transistor orreed switchTypes: Contacting FlowmeterElectrical: Optically isolated and providing an electrically isolated 9V power with anominal 2.3mA current when the digital input switch is closed, 0-500 Hz,1.00 msec minimum widthMinimum pulse frequency for the rate to be displayed: 0.17 HzDevices supported: Any device with isolated open drain, open collector, transistor orreed switchTypes: Paddlewheel FlowmeterPre-powered on circuit board switching line voltage6 A (resistive), 1/8 HP (93 W) per relayAll three relays are fused together as one group, total current for this group must notexceed 6A3
Dry contact MechanicalRelays (0 or 3 depending onmodel code):4 - 20 mA (0 or 1 dependingon model code):6 A (resistive), 1/8 HP (93 W) per relayDry contact relays are not fuse protectedInternally poweredFully isolated600 Ohm max resistive loadResolution 0.0015% of spanAccuracy 0.5% of readingAgency ApprovalsSafetyUL 61010-1:2012 3rd Ed Rev:2016CSA C22.2 No. 61010-1:2012 3rd Ed. U1; U2IEC 61010-1:2010 3rd Ed.EN 61010-1:2010 3rd Ed.BS EN 61010-1:2010 A1:2019EMCIEC 61326-1:2012EN 61326-1:2013BS EN 61326-1:2013Note: For EN61000-4-6, EN61000-4-3 the controller met performance criteria B.*Class A equipment: Equipment suitable for use in establishments other than domestic, and those directly connected toa low voltage (100-240 VAC) power supply network which supplies buildings used for domestic purposes.2.3MechanicalEnclosure MaterialEnclosure RatingDimensionsDisplayOperating Ambient TempStorage TemperatureHumidityPolycarbonateNEMA 4X (IP65)8” x 8” x 3” (203 mm x 203 mm x 76 mm)128 x 64 graphic backlit display-4 to 131 F (-20 to 55 C)-4 – 176 F (-20 – 80 C)10 to 90% non-condensingMechanical (Sensors) (*See graph)SensorPressureGraphite contactingconductivity tower316 SS contactingconductivity tower0-150 psi up to 100 F (38 C)*0- 50 psi at 140 F (60 C)0-150 psi up to 100 F (38 C) *0- 50 psi at 140 F (60 C)High pressure tower0-300 psi (0-20 bar)*Electrodeless towerLow pressure manifoldTemperature32-140 F *(0-60 C)32-140 F *(0-60 C)32-158 F *(0-70 C)32-140 F *(0-60 C)32-140 F *(0-60 C)32-158 F *(0-70 C)32-401 F(0-205 C)0-150 psi up to 100 F (38 C)*0- 50 psi at 140 F (60 C)0-150 psi up to 100 F (38 C)*0- 50 psi at 140 F (60 C)High pressure manifold0-300 psi (0-20 bar)*Boiler/condensatecontacting conductivity0-250 psi (0-17 bar)4MaterialsProcessConnectionsGFRPP, Graphite, FKM3/4” NPTFGFRPP, 316SS, FKM3/4” NPTF316SS, PEEK3/4” NPTFPP, PVC, FKM3/4” NPTFGFRPP, PVC, FKM,Isoplast3/4” NPTFCarbon steel, steel, brass3/4” NPTF316SS, PEEK3/4” NPTM
Pressure vs. TemperatureBar H/ORPLD2CondHP Cond/SteelHP pH/ORP/Steel2.482.2 18076.6 17071.1 16065.5 1509032.260.0 1408026.654.4 1307021.148.8 1206015.543.3 1105010.037.7 100404.4-1.1300 F CVariables and their LimitsSensor input settingsConductivity alarm limitsConductivity alarm dead bandCell constantSmoothing FactorComp Factor (conductivity linear ATC only)Installation Factor (Electrodeless conductivity only)Cable lengthPPM conversion factor (only if units PPM)Default temperatureCalibration Required AlarmFlow meter input settingsTotalizer alarmVolume/contact for units of Gallons or LitersVolume/contact for units of m3K Factor for units of Gallons or LitersK Factor for units of m3Paddlewheel rate alarm limitsPaddlewheel rate alarm deadbandSmoothing FactorSet Flow TotalRelay output settingsOutput Limit TimeHand Time LimitLow Limit000.010%0%0.50.10.001-200 daysLow Limit010.0010.011000%0Low Limit1 second1 second5High Limit50,00050,0001090%20%1.53,00010.000500365 DaysHigh Limit100,000,000100,0001,00010,000100,000High end of sensor rangeHigh end of sensor range90%1,000,000,000High Limit86,400 seconds (0 unlimited)86,400 seconds (0 unlimited)
Min Relay CycleSet PointDuty Cycle Period (On/Off, Dual Set-point modes)Duty Cycle (On/Off, Dual Setpoint modes)Dead BandFeed duration (Flow timer mode)Accumulator volume (Flow timer mode)Feed Percentage (Bleed then Feed mode)Feed Lockout Time Limit (Bleed & Feed, Bleed then Feed modes)Prebleed to Conductivity (Biocide mode)Prebleed Time (Biocide mode)Bleed Lockout(Biocide mode)Event duration (Biocide, Timer modes)Proportional band (Time/Pulse Proportional mode, IntermittentSampling)Sample period (Time Proportional mode)Sample Time (Intermittent Sampling mode)Hold Time (Intermittent Sampling mode)Maximum Blowdown (Intermittent Sampling mode)Wait Time (Intermittent Sampling mode)Max Rate (Pulse Proportional mode)Minimum Output (Pulse Proportional mode)Maximum Output (Pulse Proportional mode)On Delay Time (Alarm mode)Off Delay Time (Alarm mode)Analog (4-20 mA) Output settings4 mA Value20 mA ValueHand OutputSet PointProportional BandMinimum OutputMaximum OutputOff Mode Output (Proportional, PID, Flow Prop modes)Pump Capacity (Flow Prop mode)Pump Setting (Flow Prop mode)Specific Gravity (Flow Prop mode)Target (Flow Prop mode)Error OutputConfiguration settings0 secondsLow end of sensor range0:00 minutes0%Low end of sensor range0 seconds00%0 seconds1 (0 no prebleed)0 seconds0 seconds0 secondsLow end of sensorrange10 seconds0 seconds0 seconds0 seconds0 seconds10 pulses/minute0%0%0 seconds0 secondsLow Limit000%000%0%0 mA0 gal/hour or l/hour0%0 g/ml0 ppm0 mALow Limit300 secondsHigh end of sensor range59:59 minutes100%High end of sensor range86,400 seconds1,000,0001000%86,400 secondsHigh end of sensor range86,400 seconds86,400 seconds86,400 secondsHigh end of sensor rangeLocal PasswordAlarm Delay00000:00 minutes999959:59 minutes3600 seconds3600 seconds3600 seconds3600 seconds86,400 seconds2400 pulses/minute100%100%23:59:59 HH:MM:SS23:59:59 HH:MM:SSHigh Limit30,00030,000100%30,00030,000100%100%21 mA10,000 gal/hour or l/hour100%9.999 g/ml1,000,000 pm21 mAHigh Limit3.0 UNPACKING & INSTALLATION3.1Unpacking the unitInspect the contents of the carton. Please notify the carrier immediately if there are any signs of damage to thecontroller or its parts. Contact your distributor if any of the parts are missing. The carton should contain a W100series controller and an instruction manual. Any options oraccessories will be incorporated as ordered.6
3.2Mounting the electronic enclosureThe controller is supplied with mounting holes on the enclosure. It should be wall mounted with the display at eye level,on a vibration-free surface, utilizing all four mounting holes for maximum stability. Do not install the enclosure in alocation where it will be exposed to direct sunlight. Use M6 (1/4” diameter) fasteners that are appropriate for the substrate material of the wall. The enclosure is NEMA 4X (IP65) rated. The maximum operating ambient temperatureis 131 F (55 C); this should be considered if installation is in a high temperature location. The enclosure requiresthe following clearances:Top:2” (50 mm)Left:8” (203 mm) (not applicable for prewired models)Right:4” (102 mm)Bottom:7” (178 mm)3.3InstallationOnce the controller is mounted, the metering pumps may be located at any distance from the controller.PlumbingThe W100 series controllers can be supplied with a flow switch manifold designed to provide a continuously flowingsample of cooling water to the sensors. Please refer to Figures 2 through 6 below for some typical installation drawings.Cooling Towers:Tap off the discharge side of the recirculation pump to provide a minimum flow of 1 gallon per minute past the sensor.The sample must flow into the bottom of the manifold in order to close the flow switch, and return to a point oflower pressure in order to ensure flow. Install an isolation valve on both sides of the manifold to stop flow forsensor maintenance.The contacting conductivity sensor should be placed as close to the controller as possible, to a maximum distance of250 ft. (76 m). Less than 25 ft. (8 m) is recommended. The cable must be shielded from background electrical noise.Always route low voltage (sensor) signals with at least a 6” (15 cm) separation from AC voltage wiring.The electrodeless conductivity sensor should be placed as close to the controller as possible, to a maximum distanceof 120 ft. (37 m). Less than 20 ft. (6 m) is recommended. The cable must be shielded from background electrical noise.Always route low voltage (sensor) signals with at least a 6” (15 cm) separation from AC voltage wiring. These sensorsare affected by the geometry and conductivity of their surroundings, so either maintain 6 inches (15 cm) of samplearound the sensor or ensure that any nearby conductive or nonconductive items are consistently positioned. Do not installthe sensor in the path of any electrical current that may be flowing in the solution, as this will shift the conductivity reading.IMPORTANT: To avoid damaging the female pipe threads on the supplied plumbing parts, use no more than 3 wrapsof PTFE tape and thread into the pipe FINGER tight only! DO NOT use any pipe dope, plumber’s putty or othersealing products that containdiacetone alcohol, as these attack the flow switch plastic! Use PTFE tape ONLY!Boilers:The conductivity sensor should be placed as close to the controller as possible, to a maximum distance of 250 ft.(76m). The cable MUST be shielded from background electrical noise. Use 24 AWG cable.Important Boiler Installation Notes: (see figures 3 and 4)1. Make sure the minimum water level in the boiler is at least 4-6 inches (10-15 cm) above the skimmer blowdownline. If the skimmer line is closer to the surface, it is likely that steam will be drawn into the line instead of boilerwater. The skimmer line must also be installed above the highest tube.2. Maintain a 3/4 inch minimum pipe ID with no flow restrictions from the tap for the boiler skimmer blowdownline to the electrode. If the ID is reduced below 3/4 inch, then flashing will occur beyond that point and the conductivity reading will be low and erratic. Minimize the usage of tees, valves, elbows or unions between the boiler7
and the electrode.3. A manual shut off valve should be installed so that the electrode can be removed and cleaned. This valve must bea full port valve in order to avoid a flow restriction.4. Keep the distance between the tap for the boiler skimmer line to the electrode as short as possible, to a maximumof 10 feet (3m).5. Mount the electrode in the side branch of a tee in a horizontal run of pipe. This will minimize entrapment ofsteam around the electrode and will allow any solids to pass through.6. There MUST be a flow restriction after the electrode and/or control valve in order to provide back pressure. Thisflow restriction will be either a flow control valve or an orifice union. The amount of the flow restriction willaffect the blowdown rate as well, and should be sized accordingly.7. Install the motorized ball valve or solenoid valve per the manufacturer’s instructions.For best results, align the hole in the conductivity electrode such that the direction of water flow is through the hole.Guide to Sizing Blowdown Valves and Orifice Plates1. Determine the Rate of Steam Production in Pounds per Hour:Either read off the boiler name plate (water-tube boilers) or Calculate from horsepower rating (fire-tube boilers):HP x 34.5 lbs./hr. Example: 100 HP 3450 lbs./hr2. Determine the Concentration Ratio (BASED ON FEEDWATER)A water treatment chemical specialist should determine the desired number of cycles of concentration. This is theratio of TDS in the boiler water to TDS in the feedwater. Note that feedwater means the water that is fed to theboiler from the deaerator and includes makeup water plus condensate return.Example: 10 cycles of concentration has been recommended3. Determine the Required Blowdown Rate in Pounds Per HourBlowdown Rate Steam Production / (Concentration Ratio –1)Example: 3450/(10-1) 383.33 lbs./hr.4. Determine if Continuous or Intermittent Sampling is RequiredUse intermittent sampling when the boiler operation or loading is intermittent, or on boilers where the requiredblowdown rate is less than 25% of the smallest available flow control valve or less than the flow through thesmallest orifice. See the graphs on the next page.Use continuous sampling when the boiler is operating 24 hours per day and the required blowdown rate is morethan 25% of the smallest applicable flow control valve or orifice. See the graphs on the next page.Use of a flow control valve will give you the best control of the process, since the flow rate can be easilyadjusted. The dial on the valve also gives you a visual indication if the flow rate has been changed. If the valveclogs, it can be opened to clear the obstruction, and closed to the previous position.If an orifice plate is used, you must install a valve downstream from the orifice in order to fine tune the flowrate and provide additional back pressure in many applications.Example: An 80 psi boiler has a Required Blowdown Rate of 383.33 lbs./hr. The maximum flow rate of thesmallest flow control valve is 3250 lbs./hr. 3250 x 0.25 812.5 which is too high for continuous sampling.Using an orifice, the flow rate through the smallest diameter plate is 1275 lbs./hr. This is too high for continuoussampling.5. Determine the Orifice or Flow Control Valve Size for this Blowdown RateUse the following graphs to select a flow control device:8
Flow Rate in Lbs/hr for Various Orifices180001600014000lbs/hr120001/8 inch dia100003/16 inch dia1/4 inch dia5/16 inch dia8000600040002000010203040506070Pressure PSI98090100200300
Flow Control ValveMaximum Flow Rates in Lbs/hr250002000015000lbs/hr1/2" 150 PSI1/2" 300 PSI3/4" 150 PSI3/4" 300 PSI10000500002030405060708090100150200300Pressure PSI3.4Icon DefinitionsSymbolO3.5PublicationDescriptionIEC 417, No.5019Protective Conductor TerminalIEC 417, No. 5007On (Supply)IEC 417, No. 5008Off (Supply)ISO 3864, No. B.3.6Caution, risk of electric shockISO 3864, No. B.3.1CautionElectrical installationThe various standard wiring options are shown in figure 1 below. Your controller will arrive from the factory prewiredor ready for hardwiring. Depending on your configuration of controller options, you may be required to hardwire someor all of the input/output devices. Refer to figures 7 through 13 for circuit board layout and wiring.10
Note: when wiring the optional flow meter contactor input, the 4-20 mA outputs or a remote flow switch, it is advisableto use stranded, twisted, shielded pair wire between 22-26 AWG. Shield should be terminated at the controller (seefigure 10).CAUTION1.2.3.4.5.There are live circuits inside the controller even when the power switch on the front panel is in the OFF position!The front panel must never be opened before power to the controller is REMOVED!If your controller is prewired, it is supplied with a 8 foot, 18 AWG power cord with USA style plug. A tool (#1Phillips driver) is required to open the front panel.When mounting the controller, make sure there is clear access to the disconnecting device!The electrical installation of the controller must be done by trained personnel only and conform to all applicableNational, State and Local codes!Proper grounding of this product is required. Any attempt to bypass the grounding will compromise the safety ofpersons and property.Operating this product in a manner not specified by Walchem may impair the protection provided by the equipment.PowerSwitchDigital Inputs& Analog OutputOptional pH/ORP/ISESensor BNCSensorFigure 1 Conduit Wiring11RelayOutputsAC Power
COOLING TOWER METERINGPUMPSHEATEXCHANGER13"11.75"Figure 2 Typical Cooling Tower Installation12
123Skimmer Blowdown Line3/4" Min. up to Electrode10 ft. max.with minimal valves, elbows & unionsCONDUCTIVITYELECTRODEFull Port BlockValve¾" TEE2 ft.minimum1 to 3 ft.maximumMotorizedFlowControlBallValve oror SolenoidOrifice UnionValveManual Blowdown(Normally Closed)To DrainTODRAINInstall accessorieseither vertically orhorizontally, permanufacturer'sinstructions.Figure 3 Typical Boiler Installation Intermittent Sampling13
123MotorizedBallorSolenoidValveSkimmer Blowdown Line3/4" Min. up to ElectrodeFull Port BlockValveFlowControlValveor OrificeUnionCONDUCTIVITYELECTRODE¾" TEEManual Blowdown(Normally Closed)FlowControlValve orOrifice UnionTo DrainInstall accessorieseither vertically orhorizontally, permanufacturer'sinstructions.To DrainFigure 4 Typical Boiler Installation Continuous Sampling14To Drain
TYPICAL INSTALLATIONSUBMERSION ELECTRODE123COOLINGTOWERTO110 VOLT ACOUTLETX Z Y X(OPTION "B")PROBEVALVECHEMICALPUMPTOSANITARYSEWERCIRCULA
Digital Input Signals (2): State-Type Digital Inputs Electrical: Optically isolated and providing an electrically isolated 9V power with a nominal 2.3mA current when the digital input switch is closed Typical response time: 2 seconds Devices supported: Any isolated dry contact (i.e. relay, reed switch) Types: Interlock Low Speed Counter-Type
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The WCT series cooling tower controllers are supplied with a temperature compensated carbon probe with a cell constant of 1.0. The controllers are microprocessor driven industrial type with on/off control outputs. A timed sample mode may be selected, and on small towers can reduce installation costs by eliminating the need for a sampling bypass .
Cooling tower, boiler, and low cell constant condensate contacting conductivity . Note: For EN61000-4-6, EN61000-4-3 the controller met performance criteria B. *Class A equipment: Equipment suitable for use in establishments other than domestic, and those directly connected to . conductivity tower 0-150 psi up to 100 F (38 C) * 0- 50 psi .
chemical metering pumps and valves in . a broad . range of metal finishing applications. POWERFUL CONTROL. T H E N E X T G E N E R A T I O N OF. W900 Series. Walchem Fluent The W900 Series. has all the features. of the W600 Series controller. plus: pH/ORP Sensors Cost-effective different
The Walchem W600 Series controllers offer a high level of flexibility in controlling metal finishing applications. . compatible with spreadsheets like Excel) and alarms, to up to eight email addresses. . Range 23 to 500 F (-5 to 260 C) Range 0 to 22 mA Resolution 0.1 F (0.1 C) Resolution 0.01 mA .
configurations is already posted under the IT Hardware Hallway. The WCT will work with agency CIOs and the vendor community to identify the attributes of standard or upgraded laptops and desktops every six months beginning in the fourth quarter of FY 2015. Furthermore, the WCT will add or remove configurations as necessary to
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