An Iwaki America Company WDT400/410 | Dual Input Cooling Tower Controllers OVERVIEW The WDT400/410 Cooling Tower Controllers represent the latest in technological and innovative advancements from Walchem. All of the standard features you’d expect in a conventional cooling tower controller are included, plus optional simple-to-use information management tools that enable water treatment professionals to deliver more effective service to their customers. The WDT400/410 controllers have the ability to store conductivity, pH/ ORP, and temperature values, water usage, relay and flow switch status, and user settings. A USB memory stick is all that’s needed to extract the information. Download logs from the USB stick to a PC at your convenience, or copy your preferred treatment program settings to another controller to speed start-up. It couldn’t be easier! SUMMARY OF KEY BENEFITS Ensures Optimal Performance and Maximum Efficiency Precise control of conductivity and chemical feed reduces water consumption and inhibits corrosion, solids precipitation, scale build-up, and growth of algae or dangerous bacteria. $ More Informative Monthly Reports Download stored data from the controller to a USB flash stick. Use the data to easily develop reports that show actual water usage, system conductivity, temperature, and more. Efficient Customer Service Quickly identify system upsets by knowing exactly what happened and when. An event log can be downloaded to tell you precisely when pumps turned, valves opened, and when there was flow or no-flow. NT WATER TREATME RESULTS Validation and Verification Made Easy Use stored data from the controller to simply and easily validate water treatment results. The data and event logs show water usage, system conductivity, and temperature, as well as accumulated chemical feed and bleed times. Save Time Copy the user settings from your controller to a USB flash stick and upload to a new controller. Programming your new controller this way can be accomplished in seconds. It’s that simple!

WDT400 Series | Feed and Bleed Cooling Tower Controller Four chemical feed options • Feed & bleed, with or without feed lockout timer • Feed after bleed has finished, as a percentage of time • Feed as a percentage of time elapsed • Feed as a percentage of make-up water 4-20mA Output • Optional isolated 4-20mA output proportional to the conductivity reading. Flow Switch Manifolds • Optional integrated flow switch manifold may be panel mounted for quick, professional installation with only two process connections. Self-Diagnostics • Software, electronics, and sensor are constantly monitored without...

SPECIFICATIONS 24” (609.6 mm) FLOW SWITCH Cooling Tower Controller 3/4” NPTF FLOW EXIT W A L C H E M www.walchem.com 3/4” NPTF FLOW 19” (482.6 mm) NEXT 17.5” (444.5 mm)” PREV ENTER WEL pH/ORP ELECTRODE ELECTRODE J-Box SAMPLE VALVE 1/4” POLYPRO PANEL 22.5” (571.5 mm)" Inputs Outputs Power 100-240 VAC, 50/60 Hz, 8A Fuse: 1.0 ampere, 5 x 20 mm Mechanical Relays WDT400: Five powered relays (Bleed & Feed for each tower, Diagnostic Alarm) WDT410: Six powered relays (Bleed, Feed, Bio 1, Bio 2, pH/ORP, Alarm) 6 A (resistive), 1/8 HP All relays are fused together as one group, total current for this group...

ORDER INFORMATION voltage output sensor Two graphite electrodes & tees, (inline or submersion) Two graphite electrodes & flow switch manifolds, Two high pressure electrodes & glands, 10 ft.(3m) cable Two high pressure electrodes & flow switch manifolds Two SS electrodes & tees, 20 ft. (6.1 m) cable Two SS electrode & flow switch manifolds on 1 = SS + pH electrodes & tees, (inline or submersion), 2 = SS + ORP electrodes & tees (inline or submersion), 3 = SS + pH electrodes & flow switch manifold on PP 4 = SS + ORP electrodes & flow switch manifold on PP 6 = Graphite + pH electrodes & tees (inline...