The DC4000 may be programmed as a bleed and feed cooling tower controller or boiler controller. Standard features include; four feed modes (Feed & Bleed, % of Time, % of Bleed, Flow meter Pulse), intermittent or continuous sampling, uS or PPM display, flow totalizer, and manual test modes. The boiler mode includes a time-trap sampling method that prevents the flashing problems that are so common in boilers. Programming is simple and is accomplished with only three keys. The backlit liquid crystal display and LEDs provide a visual indication of operating conditions and equipment status.
BLEED or BLOWDOWN of system water by valve control can be based on several set point options:
FEED of chemical (inhibitor) can be based on four (4) different methods:
ALARM indicators and relay outputs are energized based on the following conditions: