3900 NXT 3" Duplex Water Softener Systems 5 6 7 and 14

Product Features

• Fully adjustable 5-cycle control delivers controlled up-flow backwash, downflow brining, slow rinse, rapid rinse and down-flow service

• Designed for single tank or multi-tank systems, alternating or interlocking

• Continuous flow rate of 250 GPM

• Protective NEMA 3R enclosure is water resistant, rain tight, corrosion resistant and UV stable

• Operational no hard water bypass during regeneration

• Choice of 7 or 12 day clock or meter initiated regeneration

• No hard water bypass

• Capacities are based on resin manufacturer’s data • All units set at minimum salt settings • When sizing units, use minimum capacity • All flow rates are in Gallons per Minute • All sizes and space required are in inches 3" Meter Range • Std. Range - 63,750 Gallons • Ext Range - 318,750 Gallons

Features include two Fleck 3900/1800 3200NXT Simplex Systems with a 3" electronic meter for each valve and includes two commercial brine tanks with the Clack 494 commercial shutoff valve.

Please Note: The piping from the brine tank to the mineral tank is NOT provided with these systems. One-inch connections are provided at the 1800 brine valve and brine tank. Local plumbing codes and flow rates dictate the type of piping used between the brine tank and mineral tank. The recommended refill rate for a 1,200,000 grain system is 15 gallons per minute. A consideration should be made as to the type or number of air check(s)/safety(s) installed in the brine tank with these systems.

System 5 (Fleck controls only) Meter Immediate (Interlock) (2 – 4 Valves) This is a 2 to 4 unit system, each unit having a meter, and all in service. Only one unit is allowed in regeneration at a time. A unit regenerates immediately when the available volume of treated water drops to zero (0) and no other unit is in regeneration.

System 6 - Meter Immediate Series (2 – 4 Valves) This is a 2 to 4 unit system, all in service, with one meter for the entire system. When the entire system volume of treated water drops to zero (0), it requests the first unit to go into regeneration. Then, when the first unit is done regenerating, the second follows, and so on.

System 7 Meter Alternating (2 Valves) This is a 2 unit system, with only one unit having a meter and only one unit in service. When the volume of treated water drops to zero (0) in the unit in service, it requests regeneration. This causes the unit in standby to move to service. Then the unit requesting regeneration moves to standby and begins regeneration.

System 14 Meter Progressive (2 – 4 Valves) This is a 3 or 4 unit system, each unit having a meter, one unit in service and all other units in standby. As flow rates increase,units in standby go into service. As flow rates decrease units in service go back into standby until only one unit is in service. Only one unit is allowed in regeneration at a time. When the volume of treated water drops to zero (0) in the unit in service, it requests regeneration. This causes the unit in standby to move to service. Then the unit requesting regeneration moves to standby and begins regeneration.