Walchem WCT400 Instruction Manual Page 1

WCT400/410 Series Cooling Tower Conductivity Controller Instruction Manual Five Boynton Road Hopping Brook Park Holliston, MA 01746

7 Figure 1b Typical Installation Submersion Electrode TO110 VOLT ACOUTLETTOSANITARYSERVERCOOLINGTOWEROPENSUMPCIRCULATIONPUMP(X) Unions; installed

8 3.5 Electrical installation The various standard wiring options are shown in figure 2. Your WCT series controller will arrive from the factory pre

9 Figure 3 Inputs ConductivityElectrodePower Supply(115 VAC or 230 VAC)Contact Closure:Polarity not criticalReed SwitchFlow MeterPolarity not

10 Figure 4a WCT400 Outputs Bleed Solenoid/Motorized Ball ValveBLEEDN.C.FEEDN.O. N.C. N.O.PUMPBLEEDN.C.FEEDN.O. N.C. N.O.L2L2L1L2/NGROUNDSTUDBLK

11 Figure 4b WCT410 Outputs Pump(s)Bleed Solenoid/Motorized Ball ValveAlarmL1 L2/NL2 L2 L2 L2 L2 L2BLEEDN.C.N.O. N.C.BOI 1N.O.N.C.FEEDN.C.BIO 2

12 4.0 FUNCTION OVERVIEW 4.1 Front Panel Figure 5 Front Panel 4.2 Display A summary screen is displayed while the WCT con

13 4.3 Keypad The keypad consists of 4 directional arrow keys and 4 function keys. The arrows are used to move the adjustment cursor and change settin

14 5.0 OPERATION These units control continuously while power is applied. Programming is accomplished via the local keypad and display. To view the

15 Figure 7 Main Menu 2000 S 67°FConductivity2000 S 67°FTemperature2000 S 67°FBleed OFF2000 S

16 5.2 Conductivity Menu The conductivity menu provides the following settings: Calibration, Self Test, Unit selection, and sampling mode setup. Addi

Notice © 2014 WALCHEM, Iwaki America Inc. (hereinafter “Walchem”) 5 Boynton Road, Holliston, MA 01746 USA (508) 429-1110 All Rights Reserved

17 Figure 8 Conductivity Menu CalibrateS 2000Self TestCond 1000 SSelf TestCond 666 ppmUnits S/cmSU

18 5.3 Temperature Menu The Temperature menu contains the following settings: Calibration and Units (if the Temp element is detected when the unit is

19 5.4 Bleed Menu The Bleed Menu provides the following settings: Set Point, Dead Band, Bleed Mode, Bleed Vol, Makeup Vol, HOA. The Bleed menu will be

20 Figure 10 Bleed Menu 2000 S 68° FBleed 1:01:15Bleed 1:01:15Set Point 2000Bleed 1:01:15Dead Band 200

21 5.5 Feed Menu The Feed Menu adapts to the selected Feed output mode. Hint: For easiest programming, program Feed Mode first, then step through the

22 Feed Based on Water Contactor Mode Time/Cont. (Time per contact.) This determines the length of time that the feed pump should be on for each con

23 Figure 11 Feed Menu 2112Feed Chem Feed ModeTIMEOUTFeed TIMEOUTHAND OFF >AUTO2000 S/cm 68° FFeed 21:05 A

24 5.6 WM1 and WM2 Menus The Water Meter 1 and 2 menus are used to set up the type of meter and how to convert the water meter signal into volume. T

25 5.7 Bio1 and Bio2 Menus These menus are only available on the WCT410 controller. The Bio 1 and Bio 2 menus are separate from each other but operat

26 Prog Bio 1 Add Press ENTER here to see a list of all of the biocide adds presently scheduled. The first screen displayed is for Today's Bioci

TABLE OF CONTENTS 1.0 INTRODUCTION ...

27 Figure 13 Biocide 1 Menu Bio 1 Add Mode1 Week CycleBio 1 Add ModeDaily AddsBio 1 Add Mode2 Week CycleBio 1 Add Mode4 Week CycleBio 1

28 Figure 14 Biocide 2 Menu Bio 2 Add Mode1 Week CycleBio 2 Add Mode2 Week CycleBio 2 Add Mode4 Week CycleBio 2 PRE BLDHAND OFF >

29 5.8 Time Menu This menu has only one choice, to set the Time used for Biocide adds (WCT410) or Datalogs. This menu will appear as follows: Time:

30 5.9 Conductivity Alarm Menu This menu is available for both WCT400 and WCT410 series controllers, however, only the WCT410 has a relay output for

31 5.10 4-20mA Menu This menu is only available if the 4-20mA output is installed in the controller. The 4-20mA output is available for either the WCT

32 5.11 Access Code Menu This menu determines whether the access code feature of the controller is enabled or disabled and allows you to customize t

33 5.12 Datalog Menu This menu is available on both the WCT400 and WCT410, if the data logging option has been purchased. This is indicated in the mod

34 5.13 Config Menu This menu is available on both the WCT400 and WCT410 models. It allows you to export a file that contains all of the set points in

35 5.14 Upgrade Menu This menu is available in both WCT400 and WCT410 models. It is used to upgrade the software to a newer version. If a new version

36 6.0 MAINTENANCE The WCT controller itself requires very little maintenance. Wipe with a damp cloth. Do not spray down the controller unless the e

1 1.0 INTRODUCTION The Walchem WCT400 Series controllers offer conductivity and watermeter-based control of cooling tower water, control of corrosio

37 6.2 Replacing the Fuses CAUTION: Disconnect power to the controller before opening front panel! Locate the fuses on the circuit board at the bac

38 BLEED TIMEOUT This error condition will stop conductivity control. It is caused by the bleed output being activated for longer than the programmed

39 7.3 Procedure for Evaluation of Conductivity Electrode Can be used for troubleshooting low conductivity, high conductivity, conductivity stuck

40 WCT400 WCT410 VOLTAGE 1 = 120 VAC, prewired 5 = 100-240 VAC, conduit OUTPUT N = No data output 4 = Single 4-20 mA output 2 =

2 2.0 SPECIFICATIONS 2.1 Measurement Performance Conductivity Range 0 - 10,000 µS/cm (microSiemens/centimeter) Conductivity Resolution 1 µS/cm

3 2.4 WCT Variables and their Limits Low Limit High Limit Conductivity menu PPM Conversion Factor 0.200 ppm/µS/cm 1.000 ppm/µS/cm Interval T

4 3.0 UNPACKING & INSTALLATION 3.1 Unpacking the unit Inspect the contents of the carton. Please notify the carrier immediately if there are an

5 Figure 1 Typical Installation METERING PUMPS HEATEXCHANGERCIRCULATING PUMPSOLENOIDVALVECOOLING TOWERWATERMETERCooling Tow

6 Figure 1a Typical Installation Intermittent Sampling TO ELECTRODETO SOLENOIDTOCONSTANT110 VOLTSPE DISCHARGETUBINGCHEMICALPUMPTOSANITARYSERVER