Pentair FLECK 2910 NXT Installer Manual
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Pentair FLECK 2910 NXT Installer Manual

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FLECK
2910 NXT/NXT2
INSTALLER
MANUAL
Water PURIFICATION

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BANGIE
April 3, 2025

what is the difference between p/n 28416 and 28417? DF AND UF ?

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Summary of Contents for Pentair FLECK 2910 NXT

  • Page 1 FLECK 2910 NXT/NXT2 INSTALLER MANUAL WATER PURIFICATION...

  • Page 2: Table Of Contents

    Installer manual Fleck 2910 NXT/NXT2 - Table of Contents Table of Contents Generalities ..................Scope of the documentation ............... Release management ................. Manufacturer identifier, product ..............Intended use ....................Abbreviations used ..................Norms......................1.6.1 Applicable norms ....................1.6.2 Available certificates...................

  • Page 3: Table Of Contents

    Installer manual Fleck 2910 NXT/NXT2 - Table of Contents Sizing a softener (single unit) ..............28 4.2.1 Parameters to be considered ................4.2.2 Determining the required volume of resin ............4.2.3 Resin exchange capacity and capacity of the unit ..........

  • Page 4: Table Of Contents

    Installer manual Fleck 2910 NXT/NXT2 - Table of Contents 6.1.1 Display ......................... 6.1.2 Commands ......................6.1.3 Setting the time of the day .................. 6.1.4 Basic programming..................... 6.1.5 Master programming mode................6.1.6 Diagnostic......................6.1.7 Resetting the controller ..................NXT2 Controller................... 83 6.2.1...

  • Page 5: Table Of Contents

    Installer manual Fleck 2910 NXT/NXT2 - Table of Contents 9.3.1 Use original spare parts..................133 9.3.2 Use original approved lubricants................ 133 9.3.3 Maintenance instructions ................... 133 Cleaning and maintenance................133 9.4.1 First steps......................133 9.4.2 Power head and/or motor replacement ............. 134 9.4.3...
  • Page 6 Installer manual Fleck 2910 NXT/NXT2 - Table of Contents Disposal................... 171 6 / 172 Ref. MKT-IM-002 / E - 12.11.2019...

  • Page 7: Generalities

    Installer manual Fleck 2910 NXT/NXT2 - Generalities Generalities Scope of the documentation The documentation provides the necessary information for appropriate use of the product. It informs the user to ensure efficient execution of the installation, operation or maintenance procedures. The content of this document is based on the information available at the time of publication. The original version of the document was written in English.

  • Page 8: Intended Use

    Installer manual Fleck 2910 NXT/NXT2 - Generalities Intended use The device is intended for industry environment use only and it is purpose-built for water treatment. Abbreviations used Assy Assembly BLFC Brine Line Flow Controller Brine Valve Cold Water Down Flow...

  • Page 9: Available Certificates

    Installer manual Fleck 2910 NXT/NXT2 - Generalities Meets the following technical standards: • EN 55014-1; • EN 55014-2; • EN 61000-6-1; • EN 61000-6-2; • EN 61000-6-3; • EN 61000-6-4; • EN 61010-1; • EN 61000-3-2; • EN 61000-3-3. 1.6.2 Available certificates •...

  • Page 10: Limitation Of Liability

    Pentair Quality System EMEA products benefit, under specific conditions, from a manufacturer warranty that may be invoked by Pentair’s direct customers. Users should contact the vendor of this product for applicable conditions and in case of a potential warranty claim.

  • Page 11: Scan & Service Application

    Installer manual Fleck 2910 NXT/NXT2 - Generalities 1.10 Scan & Service application Scan & Service mobile application is the ideal support for the maintenance person in his daily business. A simple scan of an identification (ID) label (1) present on the valve with a smartphone gives an instantaneously access to all updated information related to the product, such as: •...

  • Page 12: Safety

    Installer manual Fleck 2910 NXT/NXT2 - Safety Safety Safety pictograms definition DANGER This combination of symbol and keyword indicates an imminently hazardous situation that will result in serious or fatal injury if not avoided. WARNING This combination of symbol and keyword indicates a potentially hazardous situation that can result in serious or fatal injury if not avoided.

  • Page 13: Serial Label Location

    Installer manual Fleck 2910 NXT/NXT2 - Safety Serial label location Model Part number Electrical rating Serial number Production date Production order Mandatory Ensure that the serial label and the safety labels on the device are completely legible and clean ! If necessary, replace them with new labels in the same positions.

  • Page 14: Material

    Installer manual Fleck 2910 NXT/NXT2 - Safety 2.3.2 Material The following points must be observed to ensure proper operation of the system and the safety of user: • be careful of high voltages present on the transformer (100 – 240 V);...

  • Page 15: Technical Specifications

    Installer manual Fleck 2910 NXT/NXT2 - Description Description Technical specifications Design specifications/ratings Valve body Brass Rubber components EP or EPDM Weight (valve with controller) 21.0 kg (max) Recommended operating pressure 1.8 - 8.6 bar Maximum inlet pressure 8.6 bar Hydrostatic test pressure...
  • Page 16 Installer manual Fleck 2910 NXT/NXT2 - Description Electrical Controller operating voltage 24 VAC for NXT / 24  VDC for NXT2 Input supply frequency 50 or 60 Hz (controller configuration dependent) Transformer voltage 24 VAC for NXT / 24 VDC for NXT2 Motor input voltage until March 2019 24 VAC...

  • Page 17: Performance Flow Rate Characteristics

    Installer manual Fleck 2910 NXT/NXT2 - Description Performance flow rate characteristics The graph shows the pressure drop created by the valve itself at different flow rates. It allows predetermining the maximum flow rate going through the valve depending on the system settings (inlet pressure etc).

  • Page 18: Components Description And Location

    Installer manual Fleck 2910 NXT/NXT2 - Description Components description and location 3.4.1 With NXT controller and AC motor Upper power head Injector Drain line Brine valve Inlet Lower power head Auxiliary microswitch AC upper power head motor Upper piston switch...

  • Page 19: With Nxt Controller And Dc Motor

    Installer manual Fleck 2910 NXT/NXT2 - Description 3.4.2 With NXT controller and DC motor Info As of April 2019, NXT valves are supplied with 24 VDC motor. This motor is equipped with an AC-DC converter allowing it to be powered with 24 VAC or 24 VDC. Therefore, when used with NXT boards which require 24 VAC power supply and therefore send...

  • Page 20: With Nxt2 Controller And Dc Motor

    Installer manual Fleck 2910 NXT/NXT2 - Description 3.4.3 With NXT2 controller and DC motor Upper power head Injector Brine valve Lower power head AC to DC converter DC upper power head motor Auxiliary microswitch Brine valve cam Upper piston switch...

  • Page 21: System Regeneration Cycle

    Installer manual Fleck 2910 NXT/NXT2 - Description System regeneration cycle Info This valve allows to do filtration, down flow and up flow regenerations. 3.5.1 Downflow regeneration cycle (5-cycles operation) Service — normal use Untreated water is directed down through the resin bed and up through the riser tube. The hardness ions attach themselves to the resin and are removed from the raw water being exchanged on the resin beads by sodium ions.
  • Page 22 Installer manual Fleck 2910 NXT/NXT2 - Description SERVICE NORMAL USE BACKWASH Outlet Inlet Outlet Inlet Drain Valve Valve BRINE DRAW & SLOW RINSE RAPID RINSE Outlet Inlet Outlet Inlet Drain Drain Valve Valve From brine tank BRINE TANK REFILL PAUSE & DELAY...

  • Page 23: Upflow Regeneration Cycle (5-Cycles Operation)

    Installer manual Fleck 2910 NXT/NXT2 - Description 3.5.2 Upflow regeneration cycle (5-cycles operation) Service — normal use Untreated water is directed down through the resin bed and up through the riser tube. The hardness ions attach themselves to the resin and are removed from the raw water being exchanged on the resin beads by sodium ions.
  • Page 24 Installer manual Fleck 2910 NXT/NXT2 - Description PAUSE & DELAY BRINE DRAW & SLOW RINSE Outlet Inlet Outlet Inlet Drain Valve Valve From brine tank BACKWASH RAPID RINSE Outlet Inlet Outlet Inlet Drain Drain Valve Valve SERVICE BRINE REFILL NORMAL USE...

  • Page 25: Filter Cycle (3-Cycles Operation)

    Installer manual Fleck 2910 NXT/NXT2 - Description 3.5.3 Filter cycle (3-cycles operation) Service — normal use Untreated water is directed down through the filter media and up through the riser tube. The impurities are retained by the media. The water is filtered as it passes through the media.
  • Page 26 Installer manual Fleck 2910 NXT/NXT2 - Description SERVICE C1/C2 NORMAL USE BACKWASH Outlet Inlet Outlet Inlet Drain Valve Valve C3/C4 SERVICE RAPID RINSE NORMAL USE Outlet Inlet Outlet Inlet Drain Valve Valve 26 / 172 Ref. MKT-IM-002 / E - 12.11.2019...

  • Page 27: Injector Block Position For Df And Uf Configurations

    Installer manual Fleck 2910 NXT/NXT2 - Description Injector block position for DF and UF configurations Ref. MKT-IM-002 / E - 12.11.2019 27 / 172...

  • Page 28: System Sizing

    Installer manual Fleck 2910 NXT/NXT2 - System sizing System sizing Recommended Injector/DLFC/BLFC-Valve configuration Brine Tank Resin Injector DLFC BLFC syst. Diameter volume [in] Color Color [gpm] DF [gpm] UF [gpm] 1600/ 60 – 85 Yellow Blue 1650 85 – 115 Yellow 1700/ 85 – 115 Yellow 1710 150 – 165...

  • Page 29: Determining The Required Volume Of Resin

    Installer manual Fleck 2910 NXT/NXT2 - System sizing Service velocity Inlet water hardness °f °dH [bed volume per hour] [mg/l as CaCO °TH 8 - 40 <350 <35 <19.6 8 - 30 350 to 450 35 - 45 19.6 - 25.2 8 - 20 >450...

  • Page 30: Resin Exchange Capacity And Capacity Of The Unit

    Installer manual Fleck 2910 NXT/NXT2 - System sizing = Fs × BV with: service max service : service flow rate [m service max : service velocity [BV/h] service BV: bed volume of resin [m Knowing this required volume of resin, it is possible now to determine the needed tank. Note that at least a third of the total volume of the tank must be kept as free space so that the bed expansion during backwash is sufficient to ensure correct cleaning of the resin.

  • Page 31: Valve Configuration

    Installer manual Fleck 2910 NXT/NXT2 - System sizing Salt amount Corresponding resin °f.m °dH.m [g/L exchange capacity in [g/L [per L [per L resin resin resin resin as CaCO 53.8 5.38 3.01 55.5 5.55 58.5 5.85 3.27 62.7 6.27 66.9 6.69...

  • Page 32: Cycle Time Calculation

    Installer manual Fleck 2910 NXT/NXT2 - System sizing regeneration of the unit. From this data, determine the required backwash flow rate as well as the brine draw and slow rinse flow rate. In most cases, the fast rinse flow rate will be the same as the backwash flow rate, however for certain valve types the fast rinse flow rate will be the same as the service flow rate.
  • Page 33 Installer manual Fleck 2910 NXT/NXT2 - System sizing • the resin volume previously determined; • the salt amount used per regeneration; • the volume of water to use for backwash, brine draw, slow rinse and fast rinse. To calculate the backwash duration: = (N ×...

  • Page 34: Salt Amount Definition

    Installer manual Fleck 2910 NXT/NXT2 - System sizing To calculate fast rinse duration: The fast rinse is aimed at eliminating an excess of salt in the resin bed and also recompacting the resin in the tank. Depending on the valve type, the fast rinse flow rate is controlled by the DLFC or it has about the same flow rate as in service.

  • Page 35: Injectors

    Installer manual Fleck 2910 NXT/NXT2 - System sizing 4.4.1 1600 injectors INJECTOR 2 Total Rinse Draw Inlet pressure [bar] INJECTOR 3 Total Rinse Draw Inlet pressure [bar] Ref. MKT-IM-002 / E - 12.11.2019 35 / 172...
  • Page 36 Installer manual Fleck 2910 NXT/NXT2 - System sizing 4.4.2 1650 injectors INJECTOR 2 Total Rinse Draw Inlet pressure [bar] INJECTOR 3 Total Rinse Draw Inlet pressure [bar] 36 / 172 Ref. MKT-IM-002 / E - 12.11.2019...
  • Page 37 Installer manual Fleck 2910 NXT/NXT2 - System sizing 4.4.3 1700/1710 injectors INJECTOR 3C Total Rinse Rinse Draw Draw Inlet pressure [bar] INJECTOR 4C Total Rinse Draw Inlet pressure [bar] INJECTOR 5C Total Rinse Draw Inlet pressure [bar] Ref. MKT-IM-002 / E - 12.11.2019...
  • Page 38 Installer manual Fleck 2910 NXT/NXT2 - System sizing INJECTOR 6C Total Rinse Draw Inlet pressure [bar] INJECTOR 7C Total Rinse Draw Inlet pressure [bar] 38 / 172 Ref. MKT-IM-002 / E - 12.11.2019...

  • Page 39: Installation

    Installer manual Fleck 2910 NXT/NXT2 - Installation Installation CAUTION Risk of injury due to electrical shock or pressurized elements ! It is strictly forbidden for not qualified personal, to accede to system’s internal parts to perform any kind of technical action.

  • Page 40: Water

    Installer manual Fleck 2910 NXT/NXT2 - Installation • keep the media tank in an upright position. Do not turn on its side, upside down, or drop it. Turning the tank upside down may cause media to enter the valve or might clog the upper screen;...

  • Page 41: Mechanical

    Installer manual Fleck 2910 NXT/NXT2 - Installation 5.3.4 Mechanical Caution - material Risk of damage due to wrong lubricant use ! Do not use petroleum-based lubricants such as vaseline, oils, or hydrocarbon-based lubricants. Use only approved silicone grease or soapy water ! •...

  • Page 42: Valve Connection To Piping

    Installer manual Fleck 2910 NXT/NXT2 - Installation Valve connection to piping The connections should be hand tightened using PTFE (plumber’s tape) on the threads if using the threaded connection type. In case of heat welding (metal type connection), the connections should not be made to the valve when soldering.
  • Page 43 Installer manual Fleck 2910 NXT/NXT2 - Installation • excessively long and non-stretched flexible piping connection will create stresses on the valve and tank assembly when the system is pressurized, as illustrated in the below picture: on the left the assembly when the system is unpressurised, on the right the flexible piping connection when put under pressure tends to lift up the valve when stretching up.

  • Page 44: Side-Mounted Valve Installation

    Installer manual Fleck 2910 NXT/NXT2 - Installation 5.5.2 Side-mounted valve installation Valid for location having a reduced height. Inlet Inlet shutoff Manual shutoff valve bypass Rubber expansion joint Outlet Fleck meter Unit 1 lead Outlet shutoff Drain line Support tripod Rubber expansion joint •...

  • Page 45: Block Diagram And Configuration Example

    Installer manual Fleck 2910 NXT/NXT2 - Installation Block diagram and configuration example Block diagram Pressure gauge Main inlet User’s line Check valve to prevent water harm Filter cartridge By-pass Pressure regulator Meter Suggested options Mixing device Drain line Brine line...
  • Page 46 Installer manual Fleck 2910 NXT/NXT2 - Installation Outlet V291NC-603 A2727-63 Intlet 61415-20 27833 (CW) 27834 (HW) A2816-63 18168 (CW) 23473 (HW) 46 / 172 Ref. MKT-IM-002 / E - 12.11.2019...

  • Page 47: Regeneration Flows

    Installer manual Fleck 2910 NXT/NXT2 - Installation Regeneration flows Mandatory For all multiple tank systems NBP valve version must be used ! Info In this chapter, systems up to four valves are used to describe and illustrate the different multiple valves systems, even if the described system may control more than four valves.

  • Page 48: Single Valve (System 4)

    Installer manual Fleck 2910 NXT/NXT2 - Installation 5.7.1 Single valve (System 4) As named, this system works with only one valve. The regen can be initiated upon the treated volume (delayed or immediate), time clock mode or an external remote regen signal or day of week (NXT2 controller only).

  • Page 49: Duplex Alternating Immediate System (System 7)

    Installer manual Fleck 2910 NXT/NXT2 - Installation During normal operation, the controllers of each valve display the time of day and the volume of water remaining. The remaining volume is the total volume of the system. The remaining volume displayed drops with water consumption to reach zero. When this happens, if no other valve is regenerating, the lead valve starts regeneration while sending out a regeneration lock out signal to all other valves of the system.

  • Page 50: Duplex Alternating Delayed System (System 8) (Nxt2 Only)

    Installer manual Fleck 2910 NXT/NXT2 - Installation 5.7.5 Duplex alternating delayed system (System 8) (NXT2 only) This system works with 2 valves and a meter. During normal operation, the controller of each valve displays the time of day and the volume of water remaining.

  • Page 51: Multiple Valves, System On-Demand (System 14)

    Installer manual Fleck 2910 NXT/NXT2 - Installation 5.7.7 Multiple valves, system on-demand (System 14) This system type may be used to build systems from 2 to 4 valves for NXT controller, 2 to 8 valves for NXT2. Each valve must be equipped with a water meter.
  • Page 52 Installer manual Fleck 2910 NXT/NXT2 - Installation Inlet Outlet Valve Check valve Tank Primary Stand-By Stand-By Stand-By tank Meter Total flow rate demand below first trip point Total flow rate demand increases and exceeds the second trip point for a longer period than the programmed delay time.
  • Page 53 Installer manual Fleck 2910 NXT/NXT2 - Installation Inlet Outlet Valve Tank Check valve First trip Service Stand-By Stand-By point (primary Meter tank) Total flow rate is split between two meters Tanks return to standby due to decreased total flow rate and programmed trip points. The tank with the most remaining volume will be the first to go into standby.
  • Page 54 Installer manual Fleck 2910 NXT/NXT2 - Installation Inlet Outlet Valve Tank Check valve In regen 3rd in 2nd in 1st in primary standby standby standby tank Meter If two tanks are in service and both becomes exhausted at the same time, the other two tanks will shift from standby into service.

  • Page 55: Electrical Connections

    Installer manual Fleck 2910 NXT/NXT2 - Installation Electrical connections CMN: Common STRT: Remote regen start Flow meter Solenoid valve GND: Ground Sw1: Upper piston switch HCAM: Upper piston cam Sw2: Brine valve switch LCK: Remote regen lock Sw3: Lower piston switch...

  • Page 56: Nxt Controller Connections

    Installer manual Fleck 2910 NXT/NXT2 - Installation 5.8.1 NXT controller connections 56 / 172 Ref. MKT-IM-002 / E - 12.11.2019...

  • Page 57: Nxt2 Controller Connections

    Installer manual Fleck 2910 NXT/NXT2 - Installation 5.8.2 NXT2 controller connections Caution - material Risk of damage due to wrong connection ! Do not connect 24V (AC or DC) power supply on the Lower piston switch connector P17, as this would immediately and irreversibly damage the electronic board.

  • Page 58: Nxt Controller Connections For Multiple Valves

    Installer manual Fleck 2910 NXT/NXT2 - Installation 5.8.3 NXT controller connections for multiple valves 2 controllers NXT Duplex system 5, 6, 7, 9 & 14 3 controllers NXT Triplex system 5, 6, 9 & 14 4 controllers NXT Quadriplex system 5, 6, 9 & 14...

  • Page 59: Nxt2 Controller Connections For Multiple Valves

    Installer manual Fleck 2910 NXT/NXT2 - Installation 5.8.4 NXT2 controller connections for multiple valves Mandatory Use CAT5 (with RJ45 connector) or better twisted pair cables with a maximum length of 30 meters ! 2 controllers NXT2 Duplex system 5, 6, 7, 8, 9 & 14 3 controllers NXT2 Triplex system 5, 6, 9 &...

  • Page 60: Bypassing

    Installer manual Fleck 2910 NXT/NXT2 - Installation Bypassing A bypass valve system should be installed on all water conditioning systems. Bypass valves isolate the softener from the water system and allow unconditioned water to be used. Service or routine maintenance procedures may also require that the system is bypassed.

  • Page 61: Overflow Line Connection

    Installer manual Fleck 2910 NXT/NXT2 - Installation Mandatory Waste connections or the drain outlet shall be designed and constructed to provide connection to the sanitary waste system through an air-gap of 2 pipe diameters or 50.8 mm (2"), whichever is larger. Caution - material Risk of damage due to lack of gap !

  • Page 62: Brine Line Connection

    Installer manual Fleck 2910 NXT/NXT2 - Installation Overflow fitting Drain tubing Secure hose in place Air gap Drain Caution - material Risk of flooding due to lack of floor drain ! Floor drain is always recommended to avoid flooding in case of overflow.

  • Page 63: Programming

    Installer manual Fleck 2910 NXT/NXT2 - Programming Programming NXT controller 6.1.1 Display 1. System type • 4: single valve; • 5:Multiple valves, parallel interlock system, 2 to 4 valves; • 6: Multiple valves, parallel series regeneration system, 2 to 4 valves; • 7: duplex alternating immediate system, 2 valves;...

  • Page 64: Commands

    Installer manual Fleck 2910 NXT/NXT2 - Programming 6.1.2 Commands Info At any time, press D to return to the home screen without saving. Menus are displayed in a defined and incremental order. If none of the buttons are pushed for 5 minutes in the Programming mode, or if there is a power failure, the controller returns to Service mode without saving.
  • Page 65 Installer manual Fleck 2910 NXT/NXT2 - Programming Parameter Options Definition Note FEED WATER 1 to 1’999 Milligram CaCO This screen will only display on the HARDNESS lead unit for system types 6 & 7. For all other system types, it will display for all units.

  • Page 66: Master Programming Mode

    Installer manual Fleck 2910 NXT/NXT2 - Programming Info For metered valves, calendar override parameter would trigger a regeneration only if the volumetric control did not start a regeneration before calendar override period elapsed. Each volumetric regeneration happening reset the calendar override delay.
  • Page 67 Installer manual Fleck 2910 NXT/NXT2 - Programming Parameter Options Definition Note SYSTEM TYPE Single unit 1 unit. Parallel interlock 2 to 4 units. Parallel series regeneration Alternating immediate 2 units. Parallel with standby unit 2 to 4 units. On-demand VALVE ADDRESS First control valve This screen will not be displayed for system type 4.
  • Page 68 Installer manual Fleck 2910 NXT/NXT2 - Programming Parameter Options Definition Note FEED WATER 1 to 1’999 Milligram CaCO This screen will only display on the HARDNESS lead unit for system types 6 & 7. For all other system types, it will display for all units.
  • Page 69 Installer manual Fleck 2910 NXT/NXT2 - Programming Parameter Options Definition Note AUX RELAY 00:00:00 Hour Only displayed if auxiliary relay is OUTPUT START to 18:00:00 enabled in previous screen. AUX RELAY 00:00:00 Auxiliary relay will only display if OUTPUT END to 18:00:00 chemical pump is OFF for system types 6 & 7.
  • Page 70 Installer manual Fleck 2910 NXT/NXT2 - Programming • Italian; • Spanish. 1. Select the language to be displayed with 2. Press to validate the selection and advance to the next parameter. 6.1.5.4 System type Select the system in which the valve(s) operate(s).
  • Page 71 Installer manual Fleck 2910 NXT/NXT2 - Programming 1. Set the valve position with Example: Valve #1 (master). ð Default setting: valve 2 address #2. 2. Press to validate the selection and advance to the next parameter. Example: Valve #2. 6.1.5.6 System size Set the number of valves to be connected (2 to 4 valves) in the system.
  • Page 72 Installer manual Fleck 2910 NXT/NXT2 - Programming • 2750; • 2850; • 2900/2910; • 3150; • 3900. 1. Set valve type at 2910 with ð Default setting: 2750 2. Press to validate the selection and advance to the next parameter.
  • Page 73 Installer manual Fleck 2910 NXT/NXT2 - Programming 1. Set the remote controller with Without remote controller. ð Can be adjusted from OFF to 01:39:00. 2. Press to validate the selection and advance to the next parameter. With remote controller and 1 minute contact programmed.
  • Page 74 Installer manual Fleck 2910 NXT/NXT2 - Programming 1. Set the safety coefficient with No safety factor programmed. ð Can be adjusted from 0 to 50%. 2. Press to validate the selection and advance to the next parameter. 6.1.5.14 Inlet water hardness Set the inlet water hardness in the unit set on chapter Units [}Page 101] 1.
  • Page 75 Installer manual Fleck 2910 NXT/NXT2 - Programming 1. Set the trip point 2 flow rate with ð Can be adjusted from trip point 1+1 to 3998 l/min. 2. Press to validate the selection and advance to the next parameter. 3. Set the trip point 2 delay with ð...
  • Page 76 Installer manual Fleck 2910 NXT/NXT2 - Programming 1. Adjust the number of days with Without calendar forcing. 2. Press to validate the selection and advance to the next parameter. ð Can be adjusted from: Forcing every 3 days. 1 to 99 days for timeclock regeneration;...
  • Page 77 Installer manual Fleck 2910 NXT/NXT2 - Programming 1. Adjust the cycle time with 1. Backwash: 10 min. 2. Press to validate the selection and advance to the next parameter. 3. Repeat for each cycle. 2. Draw/Slow rinse: 1 h 10 min. 3. Fast rinse: 10 min.
  • Page 78 Installer manual Fleck 2910 NXT/NXT2 - Programming 1. Activate the relay with Disabled. 2. Default setting: disabled. 3. Press to validate the selection and advance to the next parameter. Relay enabled at the 4. Set the relay activation time with beginning of regeneration.
  • Page 79 Installer manual Fleck 2910 NXT/NXT2 - Programming 1. Activate the relay with Disabled. 2. Default setting: disabled. 3. Press to validate the selection and advance to the next parameter. Relay enabled every 20 litre. 4. Set the relay activating time with 5.

  • Page 80: Diagnostic

    Installer manual Fleck 2910 NXT/NXT2 - Programming 1. Set the maximum flow rate with Example: 290 L/min. 2. Press to validate the selection and advance to the next parameter. 3. Set the number of litres per pulse(s) with Example: 1 litre for 1 pulse.
  • Page 81 Installer manual Fleck 2910 NXT/NXT2 - Programming 6.1.6.3 Peak flow rate Info The controller registers the highest flow rate since the last regeneration. 6.1.6.4 Totalizer Info The controller registers the total volume of treated water that passes through the meter since start-up (or last hard reset).

  • Page 82: Resetting The Controller

    Installer manual Fleck 2910 NXT/NXT2 - Programming 6.1.6.7 Volume remaining Info Shows the volume remaining for the valve where controller is installed, excepted for system 6 where it shows the volume remaining of the complete system. In system 4, 5, 7, 9 and 14.

  • Page 83: Nxt2 Controller

    Installer manual Fleck 2910 NXT/NXT2 - Programming Info There are two options to reset: partial and hard reset. Partial reset will set all the parameters to default values, except flow meter totalizer volume in diagnostic mode. Hard reset will set all the parameters to default values.
  • Page 84 Installer manual Fleck 2910 NXT/NXT2 - Programming 2. Network Indicator • Connected; • Disconnected; • Unit missing; • USB Connected. 3. Valve status • Initializing: after a power failure or a change in the programming, the controllers initializes for approximately 30 seconds;...
  • Page 85 Installer manual Fleck 2910 NXT/NXT2 - Programming 6.2.2 Commands 6.2.2.1 Menu commands Info At any time, press to return to previous screen without saving. Menus are displayed in a defined and incremental order. Editable digit is marked by two triangles (Cursor).

  • Page 86: Time Of Day Menu

    Installer manual Fleck 2910 NXT/NXT2 - Programming 6.2.3 Time of day menu Mandatory In multiple valve systems, set the time of day on the lead valve (#1) ! The time of day will be automatically updated on the other valves in the system within 10 seconds.

  • Page 87: Basic Programming

    Installer manual Fleck 2910 NXT/NXT2 - Programming 6.2.4 Basic programming 6.2.4.1 Basic programming mode chart Parameter Options Definition Note DAY OVERRIDE / OFF to 99 Days between regenerations only for TIME DRIVEN metered regeneration types. 4, 8, 12, 16, Hour Hours or days between regenerations only for time clock regeneration type.
  • Page 88 Installer manual Fleck 2910 NXT/NXT2 - Programming 1. Press and hold simultaneously to enter user Without calendar override. programming mode. 2. Select the number of days or hours with 3. Press to validate the selection and advance to the next Override every 3 days.
  • Page 89 Installer manual Fleck 2910 NXT/NXT2 - Programming 6.2.4.6 Push settings This parameter allows to push and copy settings from the master unit to all other connected units. Info This parameter is visible only in multi-units systems. 1. Select OFF or ON with 2.
  • Page 90 Installer manual Fleck 2910 NXT/NXT2 - Programming Parameter Options Definition Note SYSTEM TYPE Single unit (default) 1 unit. Parallel interlock 2 to 8 units. Parallel series regeneration Alternating immediate 2 units. Alternating delayed Parallel with standby 2 to 8 units. unit On-demand NUMBER OF...
  • Page 91 Installer manual Fleck 2910 NXT/NXT2 - Programming Parameter Options Definition Note REGEN. TYPE TIME CLOCK Time clock (default) System 4 and 6 only. DAY OF THE Regeneration on System 4 and 6 only. WEEK selected days METER Metered immediate All system unless system 8.
  • Page 92 Installer manual Fleck 2910 NXT/NXT2 - Programming Parameter Options Definition Note FIXED% 0 to 50 This screen will only display when regeneration type selected is softener meter delayed with fixed% reserve; Any value set above 50% will be discard and 50% will be considered as % reserve.
  • Page 93 Installer manual Fleck 2910 NXT/NXT2 - Programming Parameter Options Definition Note LOCK START #1 00:00 to 23:59 Hour This screen will only display when lock windows #1 is on. LOCK END #1 00:00 to 23:59 Hour This screen will only display when lock windows #1 is on.
  • Page 94 Installer manual Fleck 2910 NXT/NXT2 - Programming Parameter Options Definition Note CONTINUOUS This screen will only display when FLOW DETECT regeneration type selected is (default) softener meter immediate or delayed. CONTINUOUS 0.1 to 227.1 l/min Only displayed if continuous flow FLOW DETECT -...
  • Page 95 Installer manual Fleck 2910 NXT/NXT2 - Programming Parameter Options Definition Note AUX. 1: TIME Minute Only displayed if “Time based” is BASED - START chosen for auxiliary 1 and END TIME End time #1 TIME #2 #1< total regeneration duration to total minus 1 minute;...
  • Page 96 Installer manual Fleck 2910 NXT/NXT2 - Programming Parameter Options Definition Note AUX. 2: CYCLE Service position Only displayed if “Cycle based” is BASED chosen for auxiliary 2; Backwash position Activate or de-activate for each Draw and slow rinse position position (  = deactivated;...
  • Page 97 Installer manual Fleck 2910 NXT/NXT2 - Programming Parameter Options Definition Note AUX. 2: VOLUME 1 to 7200 Second Only displayed if “volume based” is BASED - chosen for auxiliary 1; DURATION Volume range depend on capacity; Even if maximum theoretical programmable value is 9999 the controller will take 7200 as duration.
  • Page 98 Installer manual Fleck 2910 NXT/NXT2 - Programming • Italian; • Spanish; • Dutch; • Portuguese. 1. Select the system type with 2. Press to validate the selection and advance to the next parameter. 6.2.5.5 Assistance name 1 and 2 Edit names of assistance.
  • Page 99 Installer manual Fleck 2910 NXT/NXT2 - Programming 6.2.5.7 System type Select the system in which the valve(s) operate(s). Options: • 4: single valve; • 5: multiple valves, parallel interlock system (2- 8 units); • 6: multiple valves, parallel series regeneration system (2- 8 units);...
  • Page 100 Installer manual Fleck 2910 NXT/NXT2 - Programming Info Only visible in system 14, and on master valve, identified by on the controller screen. Depending on the number of tank used in the system, there might up to 7 trip point to set up (for 8 tanks systems).
  • Page 101 Installer manual Fleck 2910 NXT/NXT2 - Programming Options: • down flow; • up flow (do not use for 2510 and 2850 valve types); • filter. 1. Set regeneration flow with ð Default setting: down flow; 2. Press to validate the selection and advance to the next parameter.
  • Page 102 Installer manual Fleck 2910 NXT/NXT2 - Programming 1. Set the unit system with ð Default system unit: US; 2. Press to validate the selection and advance to the next parameter. 6.2.5.14 Volume override/ Volumetric Set the volume of water between 2 cleaning/regeneration cycles.
  • Page 103 Installer manual Fleck 2910 NXT/NXT2 - Programming Info Available only for softening metered systems. Based upon the system capacity, safety coefficient and inlet water hardness, the controller calculates the volume of water that the system can treat between 2 regenerations. When hardness unit is programmed in mg/L as CaCO...
  • Page 104 Installer manual Fleck 2910 NXT/NXT2 - Programming • fixed%; • fixed volume. 1. Select reserve type with 2. Press to validate the selection and advance to the next parameter. Fixed% Set the percentage of the total unit capacity used to calculate the unit safety reserve capacity.
  • Page 105 Installer manual Fleck 2910 NXT/NXT2 - Programming Info This mode can be combined with the other methods of regeneration The remotely started regenerations overrule the other regeneration type once the signal is acquired. Options: • off; • immediate; • delayed.
  • Page 106 Installer manual Fleck 2910 NXT/NXT2 - Programming • Friday; • Saturday. 1. Select the days for regeneration with ð Default setting: Sunday; ð Multi-selection is possible; ð Not selected days are marked by and selected days are marked by 2. Press to validate the selection and advance to the next parameter.
  • Page 107 Installer manual Fleck 2910 NXT/NXT2 - Programming 1. Adjust the time of regeneration with and ; 2. Can be adjusted from: 00:00 to 23:59HR; 3. Press to validate the selection and advance to the next parameter. 6.2.5.24 Lock setting Set Lock Window settings: Enable lock windows then select the desired Lock Start time and Lock End time.
  • Page 108 Installer manual Fleck 2910 NXT/NXT2 - Programming 1. Enable lock window with Lock window #2 activated. ð Default setting: off; 2. Press to validate the selection and advance to the next parameter. Lock window #2 starts at 13:00. 3. Set lock start time with 4.
  • Page 109 Installer manual Fleck 2910 NXT/NXT2 - Programming 6.2.5.26 Meter type Select the size of the flow meter. Info Available only for softening metered systems. Options: • 0.75" paddle (standard for 2510 valve series); • 0.75" turbine; • 1.0" paddle (standard for 2750 valve series); • 1.0" turbine;...
  • Page 110 Installer manual Fleck 2910 NXT/NXT2 - Programming 6.2.5.27 Continuous flow detect settings Set continuous flow detect. Info Alert appears when specified continuous flow rate is detected during service over a specified duration. Available only for softening metered systems. Note that flow rate observed due to leaks are generally much smaller than service flow rate and this parameter must therefore be programmed accordingly.
  • Page 111 Installer manual Fleck 2910 NXT/NXT2 - Programming Info The NXT2 has two auxiliary relays available based on alarm, cycle, time or volume. The following settings are auxiliary 1 settings and are the same for auxiliary 2. Options: • standby (activates relay from beginning of regeneration and during standby phase);...
  • Page 112 Installer manual Fleck 2910 NXT/NXT2 - Programming 1. Set the relay Start time #1 with Activated as of the regeneration starts. 2. Can be adjusted from:0 to the total regeneration duration minus 1 minute; TIME BASED - START TIME #1. 3. Press to validate the selection and advance to the next parameter.
  • Page 113 Installer manual Fleck 2910 NXT/NXT2 - Programming 1. Set the relay activation volume with Activates upon 1 L. 2. Can be adjusted from: 1L to the total capacity of a service cycle VOLUMEBASED-VOLUME-L. excluding the reserve capacity.; 3. Press to validate the selection and advance to the next parameter;...
  • Page 114 Installer manual Fleck 2910 NXT/NXT2 - Programming 6.2.5.31 Lock options Select the desired lock settings option (off, time based, delayed, or enter code). Info Lock Settings prevents unexpected access to master programming. Once lock settings option is activated, the controller returns to normal service display.
  • Page 115 Installer manual Fleck 2910 NXT/NXT2 - Programming 6.2.6.2 Flow rate Info The display is updated every second. 6.2.6.3 Peak flow rate Info The controller registers the highest flow rate since the last regeneration. 6.2.6.4 Totalizer Info The controller registers the total volume of treated water that passes through the meter since start-up (or last hard reset).
  • Page 116 Installer manual Fleck 2910 NXT/NXT2 - Programming 6.2.6.7 Valve address Info Shows the position of the valve in a multiple valve system. 6.2.6.8 Last regeneration Info Shows the number of hours since the last regeneration, indicating the duration of the current service cycle.
  • Page 117 Installer manual Fleck 2910 NXT/NXT2 - Programming 6.2.6.12 Last settings change Info Shows when the last settings change occurred. 6.2.6.13 Error log Info The last 20 error or alarm events are registered showing time and date of occurrences. 6.2.6.14 Sunday average daily usage Info Shows average water consumption on Sunday.
  • Page 118 Installer manual Fleck 2910 NXT/NXT2 - Programming 6.2.6.17 Monday- daily usage Info Shows water consumption for the last 20 Monday. 6.2.6.18 Tuesday average daily usage Info Shows average water consumption on Tuesday. 6.2.6.19 Tuesday- daily usage Info Shows water consumption for the last 20 Tuesday.
  • Page 119 Installer manual Fleck 2910 NXT/NXT2 - Programming 6.2.6.22 Thursday average daily usage Info Shows average water consumption on Thursday. 6.2.6.23 Thursday- daily usage Info Shows water consumption for the last 20 Thursday. 6.2.6.24 Friday average daily usage Info Shows average water consumption on Friday.
  • Page 120 Installer manual Fleck 2910 NXT/NXT2 - Programming 6.2.6.27 Saturday- daily usage Info Shows water consumption for the last 20 Saturday. 6.2.7 Resetting the controller Mandatory Once you have completed this operation, check all programming steps ! Info There are two options to reset: reset to factory defaults or reset to Non-Factory Defaults.

  • Page 121: Commissioning

    Installer manual Fleck 2910 NXT/NXT2 - Commissioning Commissioning Info This chapter is available for standard regeneration flows. Contact your supplier if the actual regeneration is not standard and if you need assistance. Water filling, draining and waterproofness inspection 7.1.1 Activating a single valve system (System 4) 1.

  • Page 122: Activating A Multiple Valves System (Systems 5, 6, 7, 8, 9 And 14)

    Installer manual Fleck 2910 NXT/NXT2 - Commissioning 12. With the brine tank completely refilled and full of salt, adjust the safety brine valve in the brine well. Make sure the overflow elbow is installed above the float level and the discharge point.

  • Page 123: Sodium Or Calcium Hypochlorite

    Installer manual Fleck 2910 NXT/NXT2 - Commissioning 7.2.2 Sodium or calcium hypochlorite These materials are satisfactory for use with polystyrene resins, synthetic gel zeolite, greensand and bentonites. 5.25% Sodium hypochlorite If stronger solutions are used, such as those sold for commercial laundries, adjust the dosage accordingly.

  • Page 124: Operation

    Installer manual Fleck 2910 NXT/NXT2 - Operation Operation Display 8.1.1 NXT controller 8.1.1.1 During service • Single valve in service in timeclock mode: • single valve in service in volume immediate or delayed mode: • lead valve in regeneration queued in interlock system: •...
  • Page 125 Installer manual Fleck 2910 NXT/NXT2 - Operation • single valve in service in volume immediate or delayed mode: • lead valve in regeneration queued in interlock system: • window lock activated in serial regeneration system: • remote lock activated in serial regeneration system: 8.1.2.2...

  • Page 126: Led Status

    Installer manual Fleck 2910 NXT/NXT2 - Operation • cycle step #4, time remaining 2 hours 40 min: Once in position: • the timer advance to regeneration cycle step #5: During transition to cycle: • cycle step #5, time remaining 15 min: Once in position: 8.1.3 LED status Blue →...

  • Page 127: Immediate Regeneration

    Installer manual Fleck 2910 NXT/NXT2 - Operation ð For NXT2: The blue LED and the symbol on the valve state flash. Info To cancel: press (for NXT) or (for NXT2) again. For NXT: The blue LED stop flashing and the letters SRV take place on the valve status.

  • Page 128: Maintenance

    Installer manual Fleck 2910 NXT/NXT2 - Maintenance Maintenance Mandatory Cleaning, maintenance and service operation shall take place at regular intervals and must be done by qualified personnel only in order to guarantee the proper functioning of the complete system. Report mainteance done in the Maintenance chapter of the User Guide document.

  • Page 129: Regeneration Test

    Installer manual Fleck 2910 NXT/NXT2 - Maintenance 9.1.3 Regeneration test 9.1.3.1 Valve used for softening 1. Check condition of brine tank and any associated equipment. 2. Check salt level in brine tank. 3. Initiate regeneration test. ð Check brine draw during brine draw stage.

  • Page 130: Recommended Maintenance Plan

    Installer manual Fleck 2910 NXT/NXT2 - Maintenance Recommended maintenance plan 9.2.1 Valve used for softening Items 1 year 2 year 3 year 4 year 5 year Injector & filter Clean Clean Clean Clean Clean/ replace if necessary BLFC*** Clean Clean...
  • Page 131 Installer manual Fleck 2910 NXT/NXT2 - Maintenance Items 1 year 2 year 3 year 4 year 5 year Valve Check Check Check Check Check watertightness Valve to piping Check Check Check Check Check watertightness * Wear parts - durability strongly affected by raw water quality and regeneration frequency.

  • Page 132: Valve Used For Filtration

    Installer manual Fleck 2910 NXT/NXT2 - Maintenance 9.2.2 Valve used for filtration Items 1 year 2 year 3 year 4 year 5 year DLFC*** Clean Clean Clean Clean Clean/ replace if necessary Bypass (if Clean Clean Clean Clean Clean/replace present,...

  • Page 133: Cleaning And Maintenance

    Installer manual Fleck 2910 NXT/NXT2 - Maintenance Recommendations 9.3.1 Use original spare parts Caution - material Risk of damage due to use of non-genuine spare parts ! To ensure correct operation and safety of the device, only use original spare parts and accessories recommended by the manufacturer.

  • Page 134: Power Head And/Or Motor Replacement

    Installer manual Fleck 2910 NXT/NXT2 - Maintenance 9.4.2 Power head and/or motor replacement 9.4.2.1 Valve with NXT controller Info As the DC motor is equipped with an AC to DC converter, AC and DC motors can be used with the NXT controller.
  • Page 135 Installer manual Fleck 2910 NXT/NXT2 - Maintenance 9.4.2.2 Valve with NXT2 controller Caution - material Risk of damage due to AC motor use ! Use only DC motor with NXT2 controller. 1. Using a flat screwdriver, unscrew (1) and open the cover (2).

  • Page 136: Lower Power Head Motor Replacement

    Installer manual Fleck 2910 NXT/NXT2 - Maintenance 9.4.3 Lower power head motor replacement Caution - material Risk of damage due to AC motor use ! Use only DC motor with NXT2 controller. Info As the DC motor is equipped with a AC to DC converter, AC and DC motors can be used with the NXT controller.

  • Page 137: Nxt To Nxt2 Controller Upgrade

    Installer manual Fleck 2910 NXT/NXT2 - Maintenance 9.4.4 NXT to NXT2 controller upgrade Mandatory As NXT2 controller functions only with DC motors, in case of NXT to NXT2 controller upgrade, the AC motor must be changed for a DC motor ! 1.
  • Page 138 Installer manual Fleck 2910 NXT/NXT2 - Maintenance 138 / 172 Ref. MKT-IM-002 / E - 12.11.2019...

  • Page 139: Nxt2 Controller Replacement

    Installer manual Fleck 2910 NXT/NXT2 - Maintenance 9.4.5 NXT2 controller replacement 1. Using a flat screwdriver, unscrew (1) and open the cover (2). 2. Press on the clips (3) and remove the controller (4). 3. Disconnect the controller (4). 4. Connect the new NXT2 controller (5), see NXT2 controller connections [}Page 57].

  • Page 140: Upper Piston And/Or Seal And Spacer Kit Disassembly/Replacement

    Installer manual Fleck 2910 NXT/NXT2 - Maintenance 9.4.6 Upper piston and/or seal and spacer kit disassembly/replacement 1. Using a flat screwdriver, unscrew (1) and open the cover (2). 2. Using pliers, remove the connecting pin (3). 3. Using a flat screwdriver, unscrew (4) and remove the motor assembly (6).
  • Page 141 Installer manual Fleck 2910 NXT/NXT2 - Maintenance Item Part number Description Packaging quantity 13061 Puller 11098 Stuffer Ref. MKT-IM-002 / E - 12.11.2019 141 / 172...

  • Page 142: Lower Piston And/Or Seal And Spacer Kit Replacement

    Installer manual Fleck 2910 NXT/NXT2 - Maintenance 9.4.7 Lower piston and/or seal and spacer kit replacement 1. Using a flat screwdriver, unscrew (1) and open the cover (2). 2. Using pliers, remove the connecting pin (5). 3. Using a 6 mm Allen key, unscrew (3) and remove the lower power head (4).
  • Page 143 Installer manual Fleck 2910 NXT/NXT2 - Maintenance Ref. MKT-IM-002 / E - 12.11.2019 143 / 172...

  • Page 144: Micro-Switches Replacement

    Installer manual Fleck 2910 NXT/NXT2 - Maintenance 9.4.8 Micro-switches replacement 9.4.8.1 Upper motor 1. Using a Phillips screwdriver, unscrew (3), extract the micro-switches (2) and protections (1). 2. Reverse above procedure steps to rebuild. AC motor DC motor 144 / 172...
  • Page 145 Installer manual Fleck 2910 NXT/NXT2 - Maintenance 9.4.8.2 Lower motor 1. Using a Phillips screwdriver, unscrew (3), extract the micro-switches (2) and protections (1). 2. Reverse above procedure steps to rebuild. AC motor DC motor Ref. MKT-IM-002 / E - 12.11.2019...

  • Page 146: Cams Replacement

    Installer manual Fleck 2910 NXT/NXT2 - Maintenance 9.4.9 Cams replacement 9.4.9.1 Upper motor 1. Using a pin punch, remove the pins (2). 2. Remove the cams (1). 3. Replace the cams (1) ensuring they are in the same position. 4. Using pliers, replace the pins (2).
  • Page 147 Installer manual Fleck 2910 NXT/NXT2 - Maintenance 9.4.9.2 Lower motor 1. Using a 6 mm wrench, unscrew (7), remove the washer (6) and the pointer (5). 2. Using pliers, remove the circlip (4) and the arm (3). 3. Using a pin punch, remove the pins (1).

  • Page 148: Injector Cleaning

    Installer manual Fleck 2910 NXT/NXT2 - Maintenance 9.4.10 Injector cleaning 1. Using an 8 mm and a 20 mm wrench, unscrew the screws (1) and the brine valve nut (2). 2. Using flat screwdrivers, remove the injectors (5) and (6) from injector body (8).

  • Page 149: Blfc Cleaning

    Installer manual Fleck 2910 NXT/NXT2 - Maintenance 9.4.11 BLFC cleaning 1. Using 16 mm and 21 mm wrenches, release the nuts (2) and remove the tube (1). 2. Using a 22 mm wrench, remove the flow washer housing (3) from the brine valve.

  • Page 150: Dlfc Cleaning

    Installer manual Fleck 2910 NXT/NXT2 - Maintenance 9.4.12 DLFC cleaning 1. Using a 39 mm wrench, unscrew and remove the flow washer housing (1). 2. Remove the flow washer (2) from the flow washer housing (1). 3. Clean or change the flow washer (2).

  • Page 151: Valve On Tank Assembly

    Installer manual Fleck 2910 NXT/NXT2 - Maintenance 9.4.13 Valve on tank assembly 1. Lubricate the seals with approved silicone grease. 2. Spin the valve (1) onto the tank (2), ensuring the threads are not cross-threaded. 3. Rotate the valve (1) clockwise and freely, without using force until it comes to a stop.

  • Page 152: Troubleshooting

    Installer manual Fleck 2910 NXT/NXT2 - Troubleshooting Troubleshooting 10.1 Error detection Info It can take up to 30 seconds before an error can be detected and displayed. Mandatory All the errors must be displayed on each controller before they can be corrected ! •...
  • Page 153 Installer manual Fleck 2910 NXT/NXT2 - Troubleshooting Problem Cause Solution Hard water By-pass valve is open. Close by-pass valve. No salt is in brine tank. Add salt to brine tank and maintain salt level above water level. Injector screen plugged.

  • Page 154: Programming Error

    Installer manual Fleck 2910 NXT/NXT2 - Troubleshooting Problem Cause Solution Excessive water in brine Plugged drain line flow control. Clean flow control. tank Plugged injector system. Clean injector and screen. Controller is not cycling. Replace controller. Foreign material in brine valve.

  • Page 155: Examples Of Error Displayed

    Installer manual Fleck 2910 NXT/NXT2 - Troubleshooting • system size: ex. programmed for 4 units, but there are only 2 units; • units of measure do not correspond between the different valves of the system; • wrong type of valve programmed.
  • Page 156 Installer manual Fleck 2910 NXT/NXT2 - Troubleshooting • the motor is on but no encoder pulses are detected or CAM Switches change state within a given duration; – Verify correct valve type is chosen. Trigger a manual regeneration. • motor current exceeds thresholds;...

  • Page 157: Spare Parts And Options

    Installer manual Fleck 2910 NXT/NXT2 - Spare parts and options Spare parts and options 11.1 Valve parts list Item Part number Description Packaging quantity VCPHINDUS1 Power head 2510/2750/2850/2910 See Power head parts list [}Page 159]. 28416-US Piston assy 2910 upper DF...
  • Page 158 Installer manual Fleck 2910 NXT/NXT2 - Spare parts and options Item Part number Description Packaging quantity BU28515-04 body assy 2910 DF/NBP HW BU28515-05 Valve body assy 2910 UF BU28515-06 Valve body assy 2910 UF/NBP 19925SP Gasket injector block 16735SP Flow washer 12 gpm...

  • Page 159: Power Head Parts List

    Installer manual Fleck 2910 NXT/NXT2 - Spare parts and options 11.2 Power head parts list Item Part number Description Packaging quantity 26260 Transformer 24 VAC, 60 VA 44415 Transformer 24 VDC BU28713 Controller assy NXT BR61702-03 Circuit board NXT 28008 Harness pulse controller 3230 (not shown)

  • Page 160: Lower Power Head Parts List

    Installer manual Fleck 2910 NXT/NXT2 - Spare parts and options Item Part number Description Packaging quantity 27927-31 Drive motor assy 24 VAC/50Hz 2910 UF (Obsolete 04/2019) 29206 Drive motor assy 2910 DF 24V DC 29207 Drive motor assy 2910 UF 24 VDC 25351 Guide cable &...

  • Page 161: Injector Parts List

    Installer manual Fleck 2910 NXT/NXT2 - Spare parts and options 11.4 Injector parts list 1600/1650 1700/1710 Brine system Part number Description Packaging quantity 1600 24555-3 Inj 1600 assy HW DF # 3 1650 24199-3 Inj 1650 assy DF # 3...

  • Page 162: Brine Valve Parts List

    Installer manual Fleck 2910 NXT/NXT2 - Spare parts and options 11.5 Brine valve parts list Item Part number Description Packaging quantity 26909-0.25 BV 1600 assy 2750NBP/2850 0.25 gpm 26909-0.50 BV 1600 assy 2750NBP/2850 0.50 gpm 26909-1 BV 1600 assy 2750NBP/2850 1 gpm BU28796-0.25 BV 1650 assy 2850 NBP 0.25 gpm...

  • Page 163: Safety Brine Valves List

    Installer manual Fleck 2910 NXT/NXT2 - Spare parts and options Item Part number Description Packaging quantity 26992-1.2 BV 1700 assy 2850 NBP 1.20 gpm 26992-2.0 BV 1700 assy 2850 NBP 2.00 gpm 26992-4.0 BV 1700 assy 2850 NBP 4.00 gpm BU28608-1.2...

  • Page 164: Safety Brine Valves Parts List

    Installer manual Fleck 2910 NXT/NXT2 - Spare parts and options Item Brine Part Description Packaging system number quantity 1600 27833 Safety brine valve 2300, without air check 27834 Safety brine valve 2300, HW, without air check 60067-03 Safety brine valve 2310, without air check...

  • Page 165: Distribution Systems Parts List

    Installer manual Fleck 2910 NXT/NXT2 - Spare parts and options Item Part number Description Packaging quantity 19645 Body, safety brine valve, 2310 19805SP Plastic SBV 2310 Nut 19804 Screw, sckt Hd, set, 10-24 x 0.75" 60068-30SP New Float assy 2310 10150SP Grommet pass rod 2300/2310/2350 18168 Air Check 500 (0,915 m)

  • Page 166: Air Checks List

    Installer manual Fleck 2910 NXT/NXT2 - Spare parts and options 11.9 Air checks list Item Brine Part Description Packaging system number quantity 1600 18168 Air checks 500A, 915mm (36") 26773 Air checks 500A, 1m25 23473 Air checks 500 HW 1710...
  • Page 167 Installer manual Fleck 2910 NXT/NXT2 - Spare parts and options Item Part number Description Packaging quantity BR15432 Impeller shaft for impeller 15374-01 BR15374 Impeller 2" 18330 Meter cover assy electronic 12473SP Screw hex washer 10-24x⅝ 18-8SS 60625-10 Meter assy 2" electronic plastic Ref.

  • Page 168: Stainless Steel Meters Parts List

    Installer manual Fleck 2910 NXT/NXT2 - Spare parts and options 11.10.2 Stainless steel meters parts list Item Part number Description Packaging quantity 29094 Meter assy SS 2" BSP Mechanical 75 m / Electronic 29095 Meter assy SS 2" BSP Mechanical 375 m 11.11...

  • Page 169: Kits

    Installer manual Fleck 2910 NXT/NXT2 - Spare parts and options Item Part number Description Packaging quantity BR19791-02 Meter cable electronic 0.75 m BR19791-04 Meter cable electronic 2.5 m BR19791-05 Meter cable electronic 7.7 m 11.12 Kits Kit 51 Kit 57 Item Brine Part number...

  • Page 170: Ce Compliance Parts List

    Installer manual Fleck 2910 NXT/NXT2 - Spare parts and options 11.13 CE compliance parts list Item Part number Description Packaging quantity Kit 8 Top distributor 2” & pin assy Kit 9 Top distributor 2” & pin assy HW 11.14 Other components list...
  • Page 171 This will help to reduce the impact on the environment, health, safety and help to promote recycling. Pentair do not collect used product for recycling. Contact your local recycling center for more information.
  • Page 172 www.pentairaquaeurope.com...

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