Walchem WCT400 Series Instruction Manual Download Page 1

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WCT400/410 Series

Cooling Tower Conductivity Controller

Instruction Manual

Five Boynton Road Hopping Brook Park Holliston, MA 01746 USA

TEL: 508-429-1110 FAX: 508-429-7433 WEB: www.walchem.com

WCT400/410 Controllers

W A L C H E M

IWAKI America Inc.

Summary of Contents for WCT400 Series

Page 1: ...ing Tower Conductivity Controller Instruction Manual Five Boynton Road Hopping Brook Park Holliston MA 01746 USA TEL 508 429 1110 FAX 508 429 7433 WEB www walchem com WCT400 410 Controllers W A L C H...

Page 2: ...months for electronics and 12 months for mechanical parts and electrodes from date of delivery from the factory or authorized distributor under normal use and service and otherwise when such equipmen...

Page 3: ...Access Code 13 4 5 Startup 13 4 6 Shut Down 13 5 0 OPERATION 14 5 1 Main Menu 14 5 2 Conductivity Menu 16 5 3 Temperature Menu 18 5 4 Bleed Menu 19 5 5 Feed Menu 21 5 6 WM1 and WM2 Menus 24 5 7 Bio1...

Page 4: ...e effect as soon as it is entered An access code is available to protect set point parameters while still allowing settings to be viewed The model WCT410 biocide outputs are scheduled on a user select...

Page 5: ...al Internally powered Fully isolated 600 Ohm max resistive load Resolution 001 of span Accuracy 1 of reading Agency Approvals Safety UL 61010 1 2012 3rd Ed CSA C22 2 No 61010 1 2012 3rd Ed IEC 61010 1...

Page 6: ...min 59 sec Time per Contact Mode D 1 second 59 min 59 sec Contacts by Mode D 1 contact 100 contacts Time Limit Mode D E 1 minute 99 min 59 sec Time Vol Mode E 1 second 59 min 59 sec Vol to Initiate Fe...

Page 7: ...WCT series controller is mounted the metering pumps may be located at any distance from the controller The conductivity electrode should be placed as close to the controller as possible to a maximum...

Page 8: ...RCULATING PUMP SOLENOID VALVE COOLING TOWER WATER METER Cooling Tower Controller www walchem com PREV NEXT ENTER EXIT FLOW FLOW FLOW SWITCH ELECTRODE SAMPLE VALVE 10 0 254 mm 1 4 POLYPRO PANEL 17 432...

Page 9: ...TOWER SPRAY PUMP CITY WATER MAKEUP SHUTOFF VALVE A D A B F C E A Unions installed for replacement of solenoid strainer or probe B solenoid C Y strainer D PVC threaded tee probe supplied with controll...

Page 10: ...X Y Z X VALVE X Y Z X OPTION B TO SANITARY SERVER PROBE NOTE LOCATION OF SOLENOID VALVE USING OPTION A OR OPTION B DEPENDS ON SYSTEM CONFIGURATION DETAIL OF PROBE ASSEMBLY TO CONTROLLER 1 PVC PIPE 1 N...

Page 11: ...re 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 1 Phillips driver is required to open the front panel 2 W...

Page 12: ...Reed Switch Flow Meter Polarity not Critical IN FLOW MTR 1 FLOW MTR 2 IN IN FLOW SW 1 IN IN IN 5V BLK RED COND T T BLEED N C FEED N O N C N O L2 L2 L1 L2 N Hall Effect Flow Meter G R E E N W H I T E G...

Page 13: ...D BLK 120V BRN 240V WHT 120V BLU 240V GRN 120V GRN YEL 240V IF MOTORIZED BALL VALVE BLK 120 BRN 240V W HT 120V BLU 240V G R N 1 2 0 V G R N Y E L 2 4 0 V Chart Recorder NOTE When connecting a motorize...

Page 14: ...WHT 120V BLU 240V GRN 120V GRN YEL 240V GRN 120V GRN YEL 240V IF MOTORIZED BALL VALVE BLK 120V BRN 240V BLK 120V BRN 240V Chart Recorder BLK 120V BRN 240V WHT 120V BLU 240V WHT 120V BLU 240V WHT 120V...

Page 15: ...ars at each 5 The bar graph is limited to displaying 20 above or below the set point When these limits are reached an L or H may appear at the end of the bar graph to indicate a low or high alarm The...

Page 16: ...it see Section 5 11 for operation With the access code enabled any user can view parameter settings but not change them Note that this provides protection only against casual tampering Use a lock on...

Page 17: ...till controlling 5 1 Main Menu The exact configuration of your WCT controller determines which menus are available as you scroll through the settings Certain menus are only available on the WCT410 con...

Page 18: ...ation 2000 S 67 F Bio 1 OFF 2000 S 67 F Bio 2 OFF 2000 S 67 F Time Sun 3 00 2000 S 67 F Cnd Alrm Lo Alrm 2000 S 67 F 4 20mA 4 0 mA 2000 S 67 F Access Code DIS Temp Error Sensor Error No Flow Bleed Tim...

Page 19: ...are not automatically translated from S cm to ppm If you change the units you will need to change your Bleed settings ppm C F This is the ppm Conversion Factor or multiplier This is typically 0 666 b...

Page 20: ...Cond 1000 S Duration 2 00 Cond Wait 23 50 Cond Samp 10 00 Cond Xtnd 10 00 Conductivity Menu Possible status screens Menu choices that appear when ppm units are selected Press Enter key to enter menu P...

Page 21: ...p Use the arrow keys to adjust the temperature displayed to match that of the water Units You may choose to display temperature in C or F Press ENTER and the Up or Down Arrow keys to change the temper...

Page 22: ...the bleed output turns OFF Assuming that the control direction is set for normal operation High Set Point the bleed output will turn off when the conductivity drops below the set point minus the Dead...

Page 23: ...y to exit menu Blinking fields may be edited with the adjust arrows Press Enter when modification is complete to return to Bleed Menu Level ENTER EXIT ENTER EXIT Operation NEXT PREV Bleed 1 01 15 Time...

Page 24: ...wave flow meters The Feed menu will be indicated on the display by one of the following The A indicates that the feed is being controlled automatically Feed A OFF Indicates that the Feed output is cur...

Page 25: ...n be disabled Feed Based on Paddlewheel Mode Time Vol This setting determines the pump on time once a given volume of water has passed through the paddlewheel sensor The volume required to initiate fe...

Page 26: ...ed Menu choices that appear when Feed as of Time mode is selected Menu choices that appear when Feed based on Water contactor input is selected Legend Feed Lockout 99 00 TIMEOUT Feed of Bleed 10 TIMEO...

Page 27: ...sor sends out This value is usually printed on the sensor s flow cell or in its instructions Tot Units This is used to set the units of measure for the totalizer Press ENTER then use the up and down a...

Page 28: ...rough the rest of the Biocide Add menu indicated below and in figures 13 and 14 This will make programming simple and logical A number of built in interlocks are part of the biocide feed program When...

Page 29: ...igher than this set point the bleed output is turned on to lower the conductivity This setting is independent of the bleed set point in the Bleed Menu There are separate Bio 1 and Bio 2 Pre Bleed sett...

Page 30: ...it key to exit menu Blinking fields may be edited with the adjust arrows Press Enter when modification is complete Use Next and Prev keys to change days in Prog Menu choices that appear when 2 Week Bi...

Page 31: ...ing fields may be edited with the adjust arrows Press Enter when modification is complete Use Next and Prev keys to change days in Prog Menu choices that appear when 2 Week Biocide Cycle mode is selec...

Page 32: ...R to store or EXIT to discard If either biocide is set for a 2 or 4 week cycle you can change the current week in the cycle by changing the week number If the longest biocide cycle is 2 weeks the 3Sun...

Page 33: ...vate If the conductivity set point is 1000 and the Low setting is 20 then the Low alarm will activate at 800 The alarm can be disabled by setting it to zero Set High This is the above the bleed set po...

Page 34: ...ctivity setting will correspond to a 4 mA output from the controller Set 20mA Pt This conductivity setting will correspond to a 20mA output from the controller Calibrate This will provide fixed 4mA an...

Page 35: ...Indicates that the access code is disabled No access code is required to change any setting Access Code REQ Indicates that the access code is required to alter settings Access Code OK Indicates that...

Page 36: ...into the USB port on the front panel of the controller Press the Enter key to download the file from the controller to the disk The file name for the Current Datalog will be Datalog serial number dat...

Page 37: ...the stick into the USB port on the front panel of the controller Press the Enter key to import the configuration file from the stick to the controller The file name must have an ini extension in its n...

Page 38: ...he file import process If the file was successfully imported from the USB disk the controller will display Transfer Success The controller will automatically reboot and come up with the new software i...

Page 39: ...mpare with the reading in step 1 above If the variance in readings is greater than 5 increase the frequency of electrode cleaning If there is less than 5 change in the reading the electrode was not di...

Page 40: ...on a false pH or conductivity reading Possible Cause Correction Action Green or white electrode wire disconnected Reconnect Faulty electrode Replace electrode Revert to manual temperature compensation...

Page 41: ...ated Possible Cause Corrective Action No flow Check recirculating pump valves etc Faulty flow switch cable Check for open circuit Disconnect flow switch and short the input with a piece of wire If no...

Page 42: ...e check the electrode connections to the terminal strip refer to Figure 3 Make sure that the correct colors go to the correct terminals and that the connections are tight Restore power and see if the...

Page 43: ...P panel 5 ft 1 5m cable 4 High pressure electrode up to 300 psi 20 ft 6 1m cable 5 High pressure electrode flow switch manifold on PP panel 5 ft 1 5m cable 6 PP SS electrode tee 20 ft 6 1m cable 7 PP...

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