2. Locate the three screws behind the manual regeneration knob by pushing the red button in and rotating the 24 hour dial until each screw appears in the cut out portion of the manual regeneration knob. 3. Loosen each screw slightly to release the pressure on the time plate from the 24-hour gear. 4. Fleck 3900. 3″ Commercial Control Valve Fleck NXT Service Manual. XT- Offers a two-line, 16 character LCD backlit display for easy entering of master and user programing as well as view of diagnostics . Fleck XT Spec Sheet. Fleck XT Service Manual. Fleck; Fleck. Pentair Water Treatment ( FLECK ) FILTRATION & PROCESS. 5730 NORTH GLEN PARK ROAD, MILWAUKEE, WI 53209. 3900 Downflow Service Manual 5600 & 5600 Econominder Service Manual 5600SE Upflow Brining Service Manual 5600SE Upflow V2.0 Master Programming Mode Flow Chart Nelsen Fleck Commercial water softeners are designed for commercial applications ranging from 168,000 to 1,950,000 grains of hardness removal capacity at flow rates up to 280 gpm. We manufacture pre-engineered single and multiple tank systems, with full documentation and O&M manuals. View Product Specifications. This is a 3" full flow Fleck 3900 triplex water softener with NXT2 controllers and 3 Clack meters. It is a very heavy duty system capable of continuous flow and is available in 450,000 to 1,200,000 Grain Capacities per tank. Features Three full 3.0" valve for high flow rates Premium high-capacity ion-exchange resin NXT2 Programmable Controllers Fleck 3900 control valve parts part lower seal spacer kit piston meter assembly cable fl60131 fl60106-00 fl60107-00 softener water replacement commercial Fleck 2510 Manual Regen Valve. Fleck 5800. Fleck 2510. Fleck 4650. Fleck 5600. Fleck 6700. Fleck 7000. Fleck 5810. Fleck 9000. Fleck 9100. Fleck 5000 (ProFlo) Fleck 5812. Fleck 3900 Series 3" Commercial Control Valves. Fleck's 3990 valve is ideal for commercial and industrial water softeners and filters with service flows up to 250 GPM and backwash requirements of up to 100 GPM. The Fleck 3900 valve body offers rugged construction and simple mechanical operation. Fleck Control Valves automatically control The Fleck 3900 is a great backwash and brine valve, designed and manufactured to work on heavy duty applications. Five-cycle control delivers controlled upflow backwash, downflow brining, slow rinse, rapid rinse and timed brine refill, are all performed with conditioned water. Continuous flow rates up to 250, 300 gpm peak. FILTRATION PROCES FLECK 3900 3-INCH CONTROL VALVE 5-CYCLE CONTROL FOR SINGLE OR MULTI-TANK SYSTEMS. FLECK ® 3900 3-INCH CONTROL VALVE. FEATURES/BENEFITS. Lead-free brass valve body for . superior strength and durability Continuous service flow rate of 250 . GPM with a backwash of 100 GPM Backwash capability accommodates . softener tanks up to Part # Mineral Tank Capacity Brine Tank Serv. Flow GPM Time Inquiry for Product; 395300-24T: 24x72: 300,000: 39x48: 120-170: 12-Day FLECK2900S Service Manual • 3 INSTALLATION Water Pressure A minimum of 20 pounds (1.4 bar) of water pressure is required for regeneration valve to operate effectively. Electrical Facilities An uninterrupted alternating current (A/C) supply is required. NOTE: Other voltages are available.