Data Sheet Liquitron™ DC4000 Series Conductivity Controller Applications • Cooling Tower • Boiler • Closed Loop Systems The DC4000 Series Conductivity Controller is a microprocessor based control system that will operate in a variety of water treatment applications. The DC4000 provides a set point and relay for conductivity control, and a variety of timer functions to control chemical addition. Programming this controller is simple and is accomplished using only three keys. The backlit LCD display and LEDs provide visual indication of operating conditions and equipment status. Features • 0–10,000 µS or 0–6,600 PPM/TDS Display • High and Low Alarm with Relay • Temperature Display in °C or F° • 4 – 20 mA Recorder Output (Standard) • Flow Switch Compatible • Backlit LCD Alpha / Numeric Display UL Approved! Feed Modes Feed Limit (Feed and Bleed) 1-999 minutes Percentage of Time (reset) 1–100 minute cycle 1–100% on-time Percentage of Control (Feed after Bleed) 1–100% of previous bleed cycle 1-999 minute limit External Trigger (pulse) 1–999 seconds on-time 1–100 counter 8 Post Office Square Acton, MA 01720 USA TEL: (978) 263-9800 FAX: (978) 264-9172 http://www.Imipumps.com Replaces same of Rev. C 3/97 1740.D 3/98

Enclosure NEMA 12X Type (prewired version) Hard wiring makes the unit suitable for NEMA 4X applications. Material (housing) Flame retardant, molded TPE Material (cover) Clear molded polycarbonate, padlockable Environment 32° F to 122° F (0° C to 50° C) 0 to 95% (non-condensing) relative humidity Hardware 115 VAC, 50/60 Hz units provided with a 6 ft (2 m) grounded power cord and plug, and two (2) 1 ft (30 cm) output power cords with grounded receptacles for controlled devices. 230 VAC, 50/60 Hz units provided with 6 ft (2 m) grounded power cord and plug, and throughput connectors for hardwire...