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Understanding the 94B-4 Series Backwash Controls

The 94B-4 Series line of controls, are solid-state filter backwash control capable of operating one master valve and up to 12 backwash valves. The control will initiate a backwash cycle after reaching a pre-determined time or by receiving a signal from the pressure switch indicating a dirty filter condition. ( LCD Monitor models are also available through the 94B-4L, 94B-8L, and 94B-12L line ).

The 94B-4 Backwash Controls are shipped ready for most normal installations. However, certain situations will require fine-tuning of the P.D. Delay, timer mode, and last station backwash settings. This is accomplished by locating the DIP Switch assembly on the back of the control panel ( see image below ) and making final adjustments.

PC BOARD DIP SWITCH

*If you have a 4-tank system, then all DIP Switches must be down and #4 should be up.

Depending on the number of tanks you have, that will dictate which switch must be up.

A. LAST STATION SWITCH

B. TIMER MODE SWITCH

C. SLAVE SWITCH

D. PRESSURE DIFFERENTIAL SWITCH DELAY

E. OFF-POSITION OF DIP SWITCH

Wiring Diagram

Use image to make all wiring connections for standard two-wire solenoid valves.

To discuss more information regarding Everfilt® Water Filtration Systems, talk with an Everfilt® Applications Engineer: 1.800.360.8380 / everfilt@everfilt.com