2025 Nelsen Corporation Catalog - Catalog - Page 244
9
Fleck NXT2 Electronic Control Valves
Control Valves
Fleck NXT2 Electronic Valves
FL2815/17-5C-0.0-NXT2
FL29/17-6C-NO-HWBP-0.0-NXT2
The NXT2 Network Controller uses on-board communication capabilities to link multiple commercial
valves (via off-the-shelf CAT5, or better cables) for a variety of system types. The NXT2 is configured for
use with Fleck® 2815, 2850, 2900s, 3150, & 3900 Control Valves, and also supports stager valves using
butterfly or notched cams.
Additionally, using a simple programming sequence, any of the following system types may be
configured in the field.
SYSTEM 4 TIME CLOCK – Single tank, no meter. Choose one control valve.
SYSTEM 4 METER DELAYED – Single tank with one meter. Delayed regeneration. Choose one control
valve, one electronic meter and one meter cable.
SYSTEM 4 METER IMMEDIATE – Single tank with one meter. Immediate regeneration. Choose one
control valve, one electronic meter and one meter cable.
SYSTEM 5 INTERLOCK – Two to eight valves with one meter on each valve. Interlock regeneration
– when one valve goes into regeneration, the valve will lock out the remaining valves until valve is
finished regenerating. Choose two, three or four valves, an equal number of electronic meters and
meter cables.
SYSTEM 6 SERIES – Two to eight valves with one remote electronic meter. Series regeneration –
when the lead valve goes into regeneration, then the next valve in-line will follow in sequence based
on the amount of valves in system. Choose two, three or four valves, one electronic meter and one
meter cable.
SYSTEM 7 ALTERNATING – Two valves with one remote electronic meter. Alternating regeneration –
one valve in stand by, one in service. Choose two valves, one electronic meter and one meter cable.
SYSTEM 9 ALTERNATING – Two to eight valves with one meter on each valve. Alternating regeneration
– one valve in stand by the remaining in service. Choose two, three or four valves, an equal number of
electronic meters and meter cables.
SYSTEM 14 DEMAND RECALL – Two to eight valves with one meter on each valve. Meter input is
required on each tank. Unit #1 will begin In Service with #2, #3, and #4 (if installed) will begin in Standby.
At least one unit is In Service at all times. When flow rate to the Primary Service Unit increases to a
user specified rate, the next unit in sequence will move from Standby to Service. As the flow rate falls
below the user specified rate, subsequent tanks will return to Standby. When the Primary Service Unit
regenerates, the next unit in sequence will becomethe new Primary Service Unit. As each units capacity
is reached, the controller will initiate a Regeneration of that unit. Depending on the number of units
in the system and flow rate demand, the regenerated unit will then be placed either into Standby or
Service. Only one unit will be in Regeneration at a time.
FL315F-HWBP-0.0-NXT2
NXT2 Electronic Commercial Control Valves
All control valves include a communication phone cable kit and “no hard water bypass” piston except
where noted. A “hard water bypass” piston may be required for System 4 applications.
2815 CONTROLS
FL2815/17-5C-0.0-NXT2
FL2815F/17-5C-0.0-NXT2
1-1/2" NXT2 Control w/5C Inj, 1720 Brining, HWBP
1-1/2" NXT2 Control w/5C Inj, 1720 Brining, HWBP
2900S CONTROLS
FL29/17-6C-HWBP-0.0-NXT2
NXT2 Timer with 6C Injector, HWB, 1700 Brine, 2.0 gpm BLFC
FL29/17-6C-NO-HWBP-0.0-NXT2 NXT2 Timer with 6C Injector, No-HWBP, 1710 Brine, 2.0 gpm BLFC
FL39/18-NO-HWBP-0.0-NXT2
9 - 18
3150 CONTROLS
FL315F-HWBP-0.0-NXT2
FL315F-NO-HWBP-0.0-NXT2
2" Filter w/Hard Water Bypass Piston
2" Filter w/No Hard Water Bypass Piston
3900 CONTROLS
FL39/18-NO-HWBP-0.0-NXT2
NXT2 Timer w/6C Injector, No-HWBP, 1800 Brine, Less/DLFC, BLFC
For more information visit – NelsenCorp.com • NelsenWaterSolutions.com • VESTAwater.com
All prices and products subject to change without notice. ©Nelsen Corporation
