PEDI Tank Exchange Program

The Culligan Smart Controller for PEDI systems & the Culligan Smart Monitor provides advanced control and monitoring for a wide variety of water treatment equipment. It can be used to monitor and control softeners, filters, ultra-filters, reverse osmosis & PEDI systems made by Culligan and most other manufacturers. With the Culligan Smart Controller / Monitor, which is comprised of multiple sensors & communications capabilities, customers can monitor their water treatment equipment performance & maintenance needs at a single site or across multiple ones 24/7. This helps companies to operate at improved efficiency, reduce potential production delays & decrease overall operating costs.

Application: PEDI Bank Switcher

In this mode, the Culligan Smart Controller can be used to switch between two banks of DI tanks.

How it works:

At first, deionized water from bank “A” is sent to drain until a specific quality is met. This is called a quality rinse. Once the water quality requirement is met, then high quality deionized water flows to service. The system continues to monitor water quality and provides deionized water from bank “A” until bank “A” is no longer able to produce the specified water quality. At this point, it switches to bank “B” and repeats the same process with bank “B.” The system monitors the total gallons of water and the average daily gallons through each bank. It also allows both banks to be set with a capacity and the system counts down from that capacity until it reaches 0. At this point, the system calls in, to indicate that the total capacity has been exhausted. However, as long as the water of sufficient quality is produced by the system, deionized water continues to be supplied to service.

In this mode, the Culligan Smart Monitor can supervise either one PEDI tank or up to two softener or filter tanks.

How it works:

The tanks can each be programmed with an initial capacity. With the flow meter(s), the system monitors the remaining capacity in each tank, keeping track of average daily gallons used, and remaining capacity. When the remaining capacity reaches zero, an alarm condition is generated. One TDS probe can be used to determine if the product TDS is exceeding its programmed limit. Differential pressure switches can also be used to trigger an alarm. Furthermore, up to two pressure transducers can programmed with upper and lower limits. If the upper or lower limites are exceeded, the monitor will trigger an alarm.

In this mode, the Culligan Smart Monitor supervises a RO system.

The Culligan Smart Monitor can be connected to flow meters, water quality (TDS) probe, temperature probes, and pressure transducers monitoring the performance of a RO system. With the pressure transducers on membrane feed and waste lines, product flow and a temperature probe, the Smart Monitor can calculate normalized flow through the membranes. With the flow meters, the Smart Monitor can calculate % recovery and % rejection. Furthermore, limits can be set on % recovery, % rejection, product TDS, water temperature and pressure so that the system generates an appropriate error message if a limit is exceeded. Many RO controllers have a dry contact alarm output. A dry contact output can be connected to one of the switch inputs on the Culligan Smart Monitor.