Pentair FLECK 3900 NXT Installer Manual
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Pentair FLECK 3900 NXT Installer Manual

Pentair FLECK 3900 NXT Installer Manual

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FLECK
3900 NXT
INSTALLER
MANUAL
WATER PURIFICATION

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Summary of Contents for Pentair FLECK 3900 NXT

  • Page 1 FLECK 3900 NXT INSTALLER MANUAL WATER PURIFICATION...

  • Page 2: Table Of Contents

    Installer Manual Fleck 3900 - NXT - Table of contents Table of contents Generalities ......... . 7 1.1.
  • Page 3 Installer Manual Fleck 3900 - NXT - Table of contents System sizing ........25 4.1.
  • Page 4 Installer Manual Fleck 3900 - NXT - Table of contents Programming ........57 6.1.
  • Page 5 Installer Manual Fleck 3900 - NXT - Table of contents Commissioning ........78 7.1.
  • Page 6 Installer Manual Fleck 3900 - NXT - Table of contents Troubleshooting ........95 10.1.

  • Page 7: Generalities

    First edition Address change, Bleam information and valve on 08.06.2018 BRY/FMI tank assembly. 1.3. Manufacturer identifier, product Manufacturer: Pentair International LLC Avenue de Sevelin 18 1004 Lausanne Switzerland Product: Fleck 3900 - NXT 1.4. Intended use The device is intended for industry environment use only and it is purpose-built for water treatment.

  • Page 8: Abbreviations Used

    Installer Manual Fleck 3900 - NXT - Generalities 1.5. Abbreviations used assy ............Assembly BLFC ............Brine Line Flow Controller BV ............Brine Valve DF............Down Flow DLFC ............Drain Line Flow Controller HW............Hot Water Inj ............Injector NBP............No By Pass PH ............

  • Page 9: Procedure For Technical Support

    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 10: Scan & Service Application

    Installer Manual Fleck 3900 - NXT - 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 11: Safety

    Installer Manual Fleck 3900 - NXT - Safety Safety 2.1. Safety pictograms definition Caution Warning Warns of a risk of minor injury or major Warns against serious personal injury material damage to the device or and damage to health. environment. Danger...

  • Page 12: Hazards

    Installer Manual Fleck 3900 - NXT - Safety 2.3. Hazards All the safety and protection instructions contained in this document must be observed in order to avoid temporary or permanent injury, damage to property or environmental pollution. At the same time, any other legal regulations, accident prevention and environmental protection measures, as well as any recognized technical regulations relating to appropriate and risk-free methods of working which apply in the country and place of use of the device must be adhered to.

  • Page 13: Hygiene Measures

    Installer Manual Fleck 3900 - NXT - Safety Assembly • Assemble only with components which are in accordance with drinking water standards; • after installation and before use, perform one or more manual regenerations in order to clean the media bed. During such operations, do not use the water for human consumption. Perform a disinfection of the system in the case of installations for treatment of drinking water for human use.

  • Page 14: Description

    Installer Manual Fleck 3900 - NXT - Description Description 3.1. Technical specifications Design specifications/ratings Valve body ..........Brass Rubber components ....... EP or EPDM Weight (valve with controller & meter) .. 41.0 kg (max) Recommended operating pressure ..1.8 - 8.6 bar Maximum inlet pressure ......
  • Page 15 Installer Manual Fleck 3900 - NXT - Description Electrical Controller operating voltage ....24 VAC Input supply frequency ......50/60 Hz Transformer voltage....... 24 VAC Motor input voltage......... 24 VAC Power consumption ....... 105 W Controller protection rating ....IP 22 Valve protection rating ......

  • Page 16: Performance Flow Rate Characteristics

    Installer Manual Fleck 3900 - NXT - Description 3.1.1. 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 17: Components Description And Location

    Installer Manual Fleck 3900 - NXT - Description 3.3. Components description and location Upper power head Brine line Drain line Outlet Camshaft Lower power head Micro-switches Brine valve Injector Motor Upper piston Inlet Display NXT controller Regeneration button Lower piston Shift button Motor Setting button...

  • Page 18: System Regeneration Cycle

    Installer Manual Fleck 3900 - NXT - Description 3.4. System regeneration cycle Note This valve allows DF and UF regenerations. 3.4.1. DF 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 19 Installer Manual Fleck 3900 - NXT - Description Note For illustration purpose only. Always verify inlet and outlet marking on the valve. SERVICE NORMAL USE BACKWASH Outlet Inlet Outlet Inlet Drain Valve Valve BRINE DRAW & SLOW RINSE RAPID RINSE Outlet Inlet Outlet...

  • Page 20: Uf Regeneration Cycle (5-Cycles Operation)

    Installer Manual Fleck 3900 - NXT - Description 3.4.2. UF 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 21 Installer Manual Fleck 3900 - NXT - Description Note For illustration purpose only. Always verify inlet and outlet marking on the valve. PAUSE & DELAY BRINE DRAW & SLOW RINSE Outlet Inlet Outlet Inlet Drain Valve Valve From brine tank BACKWASH RAPID RINSE Outlet...

  • Page 22: Filter Cycle (3-Cycles Operation)

    Installer Manual Fleck 3900 - NXT - Description 3.4.3. Filter cycle (3-cycles operation) Service — normal use Unfiltered water is directed down through the media and up through the riser tube. The water is filtered as it passes through the media. Backwash —...
  • Page 23 Installer Manual Fleck 3900 - NXT - Description Note For illustration purpose only. Always verify inlet and outlet marking on the valve. SERVICE C1/C2 NORMAL USE BACKWASH Outlet Inlet Outlet Inlet Drain Valve Valve C3/C4 SERVICE RAPID RINSE NORMAL USE Outlet Inlet Outlet...

  • Page 24: Injector Block Position For Df And Uf Configurations

    Installer Manual Fleck 3900 - NXT - Description 3.5. Injector block position for DF and UF configurations 24 / 126 Ref. MKT-IM-015 / B - 08.06.2018...

  • Page 25: System Sizing

    Installer Manual Fleck 3900 - NXT - System sizing System sizing 4.1. Recommendations 4.1.1. Injector/DLFC/BLFC-Valve configuration Tank Resin Injector DLFC BLFC Brine Diameter volume syst. [in] Color Color [gpm] DF [gpm] UF [gpm] 283 - 424 Green 20.0 Green 284 - 425 25.0 426 - 605 White...
  • Page 26 Installer Manual Fleck 3900 - NXT - System sizing The below sizing method can be applied for both residential and industrial softeners. The sizing of a softener must be based upon certain parameters: • inlet water hardness; • peak flow rate and nominal flow rate; •...

  • Page 27: Determining The Required Volume Of Resin

    Installer Manual Fleck 3900 - NXT - System sizing Piping size (internal diameter) Max. flow rate [in] [mm] /h at 3 m/s] 1.25 8.69 13.57 21.20 34.2 49.2 4.2.2. Determining the required volume of resin When sizing a softener, make sure that the volume of resin in the tank (bed volume) will be sufficient so that even when the peak flow rate is reached, the velocity is still between the above values depending on the hardness.

  • Page 28: Resin Exchange Capacity And Capacity Of The Unit

    Installer Manual Fleck 3900 - NXT - System sizing 4.2.3. Resin exchange capacity and capacity of the unit The resin exchange capacity and capacity of the unit are two different things that should not be confused. The resin exchange capacity is the amount of Ca and Mg that can be retained by 1 litre of resin, which will depend on the resin type and salt dosage, whereas the capacity of the unit is the...
  • Page 29 Installer Manual Fleck 3900 - NXT - System sizing Salt amount Corresponding resin exchange °f.m °dH.m [g/L capacity in [g/L ] as CaCO [per L [per L resin resin resin resin 58.5 5.85 3.27 62.7 6.27 66.9 6.69 3.74 3.97 75.3 7.53 4.21...

  • Page 30: Valve Configuration

    Installer Manual Fleck 3900 - NXT - System sizing 4.2.4. Valve configuration Knowing the volume of resin, tank size and specifications of the resin, it is possible to determine the required valve configuration. The resin specification will give the backwash velocity, as well as the brine draw and slow rinse velocity that must be respected in order to ensure a proper regeneration of the unit.

  • Page 31: Cycle Time Calculation

    Installer Manual Fleck 3900 - NXT - System sizing 4.2.5. Cycle time calculation From this point, the volume of resin, the tank size, the capacity of the softener and the valve configuration are determined. Next step is to calculate the regeneration cycle duration, which depends on the valve configuration and once again on the resin specifications.
  • Page 32 Installer Manual Fleck 3900 - NXT - System sizing To calculate the brine draw duration: Knowing the injector draw flow rate at the working pressure: with: brine draw brine draw : brine draw duration [min] brine draw : brine volume to be drawn [L], see Refill calculation brine page 33 : injection draw flow rate [L/min]...

  • Page 33: Defining Salt Quantities

    Installer Manual Fleck 3900 - NXT - System sizing To calculate the refill duration: The refill flow rate is controlled by the refill controller (BLFC). The relation between the BLFC size, the tank size and the resin volume is given in the valve specifications. To calculate the refill duration: with: refill...

  • Page 34: 1800 Injector Flow Rates

    Installer Manual Fleck 3900 - NXT - System sizing 4.4. 1800 Injector flow rates The following tables and graphics represent the injectors flow rate as a function of the inlet pressure for the different injector sizes. INJECTOR 5 Total Rinse Draw Inlet pressure [bar] INJECTOR 6...
  • Page 35 Installer Manual Fleck 3900 - NXT - System sizing INJECTOR 7 Total Rinse Draw Inlet pressure [bar] INJECTOR 8 Total Rinse Draw Inlet pressure [bar] INJECTOR 9 Total Draw Rinse Rinse Draw Inlet pressure [bar] Ref. MKT-IM-015 / B - 08.06.2018 35 / 126...
  • Page 36 Installer Manual Fleck 3900 - NXT - System sizing INJECTOR 10 Total Rinse Draw Inlet pressure [bar] 36 / 126 Ref. MKT-IM-015 / B - 08.06.2018...

  • Page 37: Installation

    Installer Manual Fleck 3900 - NXT - Installation Installation Mandatory It is strictly forbidden for not qualified personal, to accede to system’s internal parts to perform any kind of technical action. Be sure to disconnect the electrical power, close the water inlet and depressurize the system before opening the front cover to access internal parts.

  • Page 38: Installation Environment

    Installer Manual Fleck 3900 - NXT - Installation 5.3. Installation environment 5.3.1. General • Use only brine salts designed for water softening. Do not use ice melt, block, or rock salts; • 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 plug the upper screen;...

  • Page 39: Mechanical

    Installer Manual Fleck 3900 - NXT - Installation 5.3.4. Mechanical • Do not use petroleum-based lubricants such as Vaseline, oils, or hydrocarbon-based lubricants. Use only 100% silicone lubricants; • all plastic connections should be hand-tightened. PTFE (plumber’s tape) may be used on connections that do not use an O-ring seal.

  • Page 40: Valve Connection To Piping

    Installer Manual Fleck 3900 - NXT - Installation 5.5. 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 41 • in any case, any failure caused by improper installations and/or piping connections may void the warranty of Pentair products; • in the same way, using lubricant* on the valve thread is not allowed and will void the warranty for the valve and tank.

  • Page 42: Side-Mounted Valve Installation

    Installer Manual Fleck 3900 - NXT - Installation 5.5.2. Side-mounted valve installation Valid for location having a reduced height. Inlet shutoff Inlet Manual shutoff valve bypass Rubber expansion joint Outlet Fleck meter Unit 1 lead Outlet shutoff Drain line Support tripod Rubber expansion joint •...

  • Page 43: Block Diagram And Configuration Example

    Installer Manual Fleck 3900 - NXT - Installation 5.6. 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 Drain line Brine line Valve Brine tank Resin tank...

  • Page 44: System Types

    Installer Manual Fleck 3900 - NXT - Installation Side mounted configuration example Valve 3900 NXT Upper distributor A-2742-FU Side mounted SBV 28182 adapter 18926 Tank C-4278-F7 Upper distributor A-2742-FL Air check 18979 5.7. System types Note For all multiple tank systems, NBP version valves must be used. Metered immediate: The controller monitors the volume of water used.

  • Page 45: Single Valve (System #4)

    Installer Manual Fleck 3900 - NXT - 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 or an external remote regen signal. Inlet Outlet Valve...

  • Page 46: Multiple Valves With Consecutive Regenerations (System #6)

    Installer Manual Fleck 3900 - NXT - Installation 5.7.3. Multiple valves with consecutive regenerations (System #6) This system works with 2 to 4 valves and a meter. During normal operation, the controllers of each valve display the time of day and the volume of water remaining.

  • Page 47: Multiple Valves, Alternating (System #9)

    Installer Manual Fleck 3900 - NXT - Installation 5.7.5. Multiple valves, alternating (System #9) This system works with 2 to 4 valves. One, two or three tanks online supplying treated water, one tank in standby. Each unit in the system has its own flow meter.
  • Page 48 Installer Manual Fleck 3900 - NXT - Installation 2. The total flow rate to the primary tank increase past the first trip point programmed rate. The flow rate demand stays past the trip point for the preset delayed time. The next tank (least volume remaining) changes from standby to in service.
  • Page 49 Installer Manual Fleck 3900 - NXT - Installation 4. Total flow rate demand increased past a second trip point programmed rate. The second and third tank (least volume remaining) changes from standby to service. The total flow is split between three meters. Inlet Outlet Valve...
  • Page 50 Installer Manual Fleck 3900 - NXT - Installation 6. Tanks return to standby due to decreased total flow rate and trip points programmed. The tank with the most remaining volume will be the first to go into standby. Inlet Outlet Valve Tank Check valve...

  • Page 51: Valve Connection To Piping

    Installer Manual Fleck 3900 - NXT - Installation If two tanks are in service and both reach Volume remaining = 0, the other two tanks will shift from standby into service. The lead tank with Volume remaining = 0 will start regeneration. The second tank with Volume remaining = 0 will enter into standby.

  • Page 52: Electrical Connections

    Installer Manual Fleck 3900 - NXT - Installation 5.9. Electrical connections Interlock (RJ45 cable) Adapter power head Black Violet HCAM: Upper position cam Green LDM: Lower power head motor Brown Inhibition signal UDM: Upper power head motor Yellow Remote regen signal start Sw1: Upper position switch White...

  • Page 53: Connections For Multiple Valves

    Installer Manual Fleck 3900 - NXT - Installation 5.9.1. Connections for multiple valves 2 controllers NXT Duplex systems #5, #6, #7, #9 & #14 3 controllers NXT Triplex systems #5, #6, #9 & #14 4 controllers NXT Quadriplex systems #5, #6, #9 & #14 Ref.

  • Page 54: Bypassing

    Installer Manual Fleck 3900 - NXT - Installation 5.10. 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 55: Drain Line Connection

    Installer Manual Fleck 3900 - NXT - Installation 5.11. Drain line connection Note Standard commercial practices are expressed here. Local codes may require changes to the following suggestions. Check with local authorities before installing a system. Mandatory The drain line must be built with 1" PVC rigid tube with an air gap must be present at the drain.

  • Page 56: Overflow Line Connection

    Installer Manual Fleck 3900 - NXT - Installation 5.12. Overflow line connection In the event of a malfunction, the brine tank overflow fitting will direct "overflow" to the drain instead of spilling on the floor. This fitting should be on the side of the brine tank. Most tank manufacturers include a post for the tank overflow connector.

  • Page 57: Programming

    Installer Manual Fleck 3900 - NXT - Programming Programming 6.1. Display 6.1.1. During service 7#1 SRV* 08:26HR VOLUME 20000L 1. System type → #4: single valve; → #5: lockout system, 2 to 4 valves; → #6: parallel system, sequential regenerations, 2 to 4 valves; →...

  • Page 58: Setting The Time Of The Day

    Installer Manual Fleck 3900 - NXT - Programming Press to pass to the next step. to move the cursor to the next digit. to adjust the values. Press D at any time to exit programming mode without saving. 6.3. Setting the time of the day Set the time in the system.

  • Page 59: Inlet Water Hardness

    Installer Manual Fleck 3900 - NXT - Programming Select the language to be displayed with Press to validate the selection and advance to the next parameter. 6.4.2. Inlet water hardness Set the input water hardness in the unit defined on chapter 6.5.11. Display format, page 67. FEED WATER...

  • Page 60: Master Programming Mode

    Installer Manual Fleck 3900 - NXT - Programming 6.5. Master programming mode Note As soon as programming mode is entered, all parameters can be displayed or set to suit the needs. Depending on the current programming, some functions will not be displayed or will not be changeable.
  • Page 61 Installer Manual Fleck 3900 - NXT - Programming Parameter Options Definition Note 2 valves in the system This screen will not be displayed for SYSTEM SIZE 3 valves in the system system type 4. 4 valves in the system TIME CLK Time clock delayed System 4 only.
  • Page 62 Installer Manual Fleck 3900 - NXT - Programming Parameter Options Definition Note This screen will only display on the lead unit for system types 6 & 7. For all FEED WATER other system types, it will display for Milligram CaCO 1 to 1’999 HARDNESS all units.
  • Page 63 Installer Manual Fleck 3900 - NXT - Programming Parameter Options Definition Note OFF to This screen will only display when CYCLE 5 Hour 04:00:00 cycle 4 is not OFF. Enabled AUXILIARY Not compatible with CPO AUX RELAY activation. Disabled (Default) AUX RELAY 00:00:00 to Only displayed if auxiliary relay is...

  • Page 64: Entering Master Programming Mode

    Installer Manual Fleck 3900 - NXT - Programming 6.5.2. Entering master programming mode 7#1 SRV* 08:26HR Press simultaneously for 5 seconds to enter the master programming mode. VOLUME 20000L 6.5.3. Language setting Select the displayed language. Options: • English; • French;...

  • Page 65: Valve Address In The System

    Installer Manual Fleck 3900 - NXT - Programming 6.5.5. Valve address in the system Set the valve position in the system. Note Only visible in systems 5, 6, 7, 9 and 14. Note The number #1 is the lead valve (master) and contains the programmed parameters used by the other controllers in the system in order to control the regeneration and service or standby positions.

  • Page 66: Regeneration Type

    Installer Manual Fleck 3900 - NXT - Programming 6.5.7. Regeneration type Select the regeneration type. Options: • time clock delayed: regeneration will take place, at the programmed regeneration start up time, after predetermined delay set up in day elapsed (available only for system type 4); •...

  • Page 67: Remote Started Regeneration

    Installer Manual Fleck 3900 - NXT - Programming Options: • down flow; • up flow (not for 2850 valve type); • up flow fill first (only for 2750 and 2900/2910 types). REGENERANT FLOW: Set regeneration flow with → Default setting: down flow DOWN FLOW Press to validate the selection and advance to the next...

  • Page 68: System Capacity

    Installer Manual Fleck 3900 - NXT - Programming 6.5.12. System capacity Set the capacity of the tank where the valve is installed. Note On the basis of system capacity, safety coefficient and inlet water hardness, the controller calculates the volume of water that the system can treat between 2 regenerations. Example: 3000 g of CaCO Set the unit capacity with capacity.
  • Page 69 Installer Manual Fleck 3900 - NXT - Programming 6.5.15.1 Trip point 1 Note Only visible if controller programmed as valve position #1. TRIP POINT 1: Set the trip point 1 flow rate with → Can be adjusted from 0 to 3997 Lpm. 0000 Lpm AA Press to validate the selection and advance to the next...

  • Page 70: Regeneration Days Override

    Installer Manual Fleck 3900 - NXT - Programming TRIP DELAY 3: AJ Set the trip point 3 delay with → Can be adjusted from 30 to 99 seconds. 30 SECONDS AK Press to validate the selection and advance to the next parameter.

  • Page 71: Programming Regeneration Cycle Times

    Installer Manual Fleck 3900 - NXT - Programming 6.5.18. Programming regeneration cycle times Set the cycle times of the regeneration. Note Five cycles can be set. The system displays the programming cycles. The display allows setting of a specific time for each cycle. If a cycle is set to NO, the next cycles is not activated. Note...
  • Page 72 Installer Manual Fleck 3900 - NXT - Programming Disabled. AS Activate the relay with AUXILIARY RELAY: → Default setting: disabled. DISABLED AT Press to validate the selection and advance to the next parameter. Relay enabled beginning of regeneration. AU Set the relay activation time with AUX RELAY OUTPUT...

  • Page 73: Flow Meter Selection

    Installer Manual Fleck 3900 - NXT - Programming 6.5.20. Flow meter selection Select the size of the flow meter. Options: • 1" paddle; • 1" turbine; • 1½" paddle; • 1½" turbine; • 2" paddle; • 3" paddle (standard for 3900 valve); •...

  • Page 74: Parameters Saving

    Installer Manual Fleck 3900 - NXT - Programming 6.5.21. Parameters saving Note When the last parameter is set and the button pressed, the controller updates the database based on the new programming. Wait until programming is finished, this may take a few seconds.

  • Page 75: Totalizer

    Installer Manual Fleck 3900 - NXT - Programming 6.6.4. Totalizer Note The controller registers the total volume of treated water that passes through the meter since start-up (or last hard reset).  TOTALIZER To reset, press and hold the buttons for 5 seconds until the display shows zero.

  • Page 76: Valve Position

    Installer Manual Fleck 3900 - NXT - Programming system (complete system). VOL REMAIN SYST 0100000L 6.6.8. Valve position Note Shows the position of the valve in a multiple valve system, also called the valve address. VALVE ADDRESS:  6.6.9. Software version Note...

  • Page 77: Resetting The Controller

    Installer Manual Fleck 3900 - NXT - Programming 6.7. Resetting the controller Mandatory Once you have completed this operation, it is necessary to check all programming steps. Note There are two methods to reset. 6.7.1. Partial reset Caution All the parameters are set to default values, except flow meter totalizer volume in diagnostic mode.

  • Page 78: Commissioning

    Installer Manual Fleck 3900 - NXT - Commissioning Commissioning Note This chapter is available for standard regeneration types. Contact your supplier if the actual regeneration is not standard and if you need assistance. 7.1. Water filling, draining and waterproofness inspection 7.1.1.

  • Page 79: Activating A Multiple Valves System

    Installer Manual Fleck 3900 - NXT - Commissioning 7.1.2. Activating a multiple valves system (Systems #5, #6, #7, #9 and #14) Follow the previous procedure for each tank of the system. Note In order to gain time, program first all tanks as single system #4. Proceed to start up as described above for each tank, then program the correct system type and valve address and eventually set/trip points in case of system #14.

  • Page 80: Sodium Or Calcium Hypochlorite

    Installer Manual Fleck 3900 - NXT - 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 81: Operation

    Installer Manual Fleck 3900 - NXT - Operation Operation 8.1. Display 8.1.1. During service • Single valve in service in timeclock mode: 4#- SRV 15:25HR REGEN IN 03 DAYS • single valve in service in volume immediate or delayed mode: 4#- SRV* 14:24HR...

  • Page 82: Recommendations

    Installer Manual Fleck 3900 - NXT - Operation 8.2. Recommendations • Use only regeneration salts designed for water softening in accordance with EN973; • for optimal system operation, the use of clean salt, free from impurities, is recommended (for example salt pellets); •...

  • Page 83: Maintenance

    Cleaning and maintenance shall take place at regular intervals in order to guarantee the proper functioning of the complete system, and be documented in the maintenance chapter in the user guide document. Mandatory The maintenance must be done by a professional certified by Pentair, otherwise the warranty will void. 9.1. Recommendations 9.1.1.

  • Page 84: Replacing The Upper/Lower Power Head Motor

    Installer Manual Fleck 3900 - NXT - Maintenance 9.2.2. Upper/lower power head motor replacement Operation Using a flat screwdriver, unscrew or 1b) and open the cover or 2b). Disconnect the motor (10). Remove the micro-switches (9), see chapter 9.2.3. Micro-switches replacement, page 85. Using a Philips screwdriver, unscrew (5) and open the controller (8) (only for upper power head motor).

  • Page 85: Replacing Micro-Switches

    Installer Manual Fleck 3900 - NXT - Maintenance 9.2.3. Micro-switches replacement Operation Using a flat screwdriver, unscrew or 1b) and open the cover or 2b). Using a Phillips screwdriver, unscrew (3) and extract the protection plates (4) and the micro-switches (5). Reverse above procedure steps to rebuild Ref.

  • Page 86: Replacing The Upper Piston And/Or Seal And Spacer Kit

    Installer Manual Fleck 3900 - NXT - Maintenance 9.2.4. Upper piston and/or seal and spacer kit replacement Operation Using a flat screwdriver, unscrew (1) and open the cover (2). Using a 32 mm wrench, unscrew (3). Using pliers, remove the clip (6) and the connecting pin (7). Using a 10 mm wrench, unscrew (4) and remove the upper power head (5).
  • Page 87 Installer Manual Fleck 3900 - NXT - Maintenance Ref. MKT-IM-015 / B - 08.06.2018 87 / 126...

  • Page 88: Replacing The Lower Piston And/Or Seal And Spacer Kit

    Installer Manual Fleck 3900 - NXT - Maintenance 9.2.5. Lower piston and/or seal and spacer kit replacement Operation Using a flat screwdriver, unscrew (1) and open the cover (2). Using pliers, remove the clip (5) and the connecting pin (6). Using a 10 mm wrench, unscrew (3) and remove the lower power head (4).
  • Page 89 Installer Manual Fleck 3900 - NXT - Maintenance Ref. MKT-IM-015 / B - 08.06.2018 89 / 126...

  • Page 90: Replacing The Upper/Lower Cam

    Installer Manual Fleck 3900 - NXT - Maintenance 9.2.6. Upper/lower cam replacement Operation Using a flat screwdriver, unscrew or 1b) and open the cover or 2b). Remove the micro-switches (3), see chapter 9.2.3. Micro-switches replacement, page 85. Disconnect the motor (4). Using a Philips screwdriver, unscrew (7) and open the controller (8) (only for upper power head).

  • Page 91: Cleaning The Injector

    Installer Manual Fleck 3900 - NXT - Maintenance 9.2.7. Injector cleaning Operation Using a 4 mm Allen wrench, unscrew (1). Using a 24 mm wrench, remove the tube (9). Using a 4 mm Allen wrench, unscrew (10) and remove the connector (8), the o-ring (7) and the injector nozzle (6).

  • Page 92: Cleaning The Blfc

    Installer Manual Fleck 3900 - NXT - Maintenance 9.2.8. BLFC cleaning Operation Using a 34 mm wrench, remove the flow control housing (1) from the valve. Using pliers, remove the retaining ring (6), the flow control retainer (5), the washer holder (3) and the washer (4).

  • Page 93: Cleaning The Dlfc

    Installer Manual Fleck 3900 - NXT - Maintenance 9.2.9. DLFC cleaning Operation Using a 5 mm Allen wrench, unscrew (1) and remove the housing (2). Remove the cover plate (4) and the seat (6). Remove the washers (5) from the seat (6). Clean or change the washers (5).

  • Page 94: Valve On Tank Assembly

    Installer Manual Fleck 3900 - NXT - Maintenance 9.2.10. Valve on tank assembly Operation Lubricate the seals with approved silicone grease. Spin the valve (1) onto the tank (2), ensuring the threads are not cross-threaded. Rotate the valve (1) clockwise and freely, without using force until it comes to a stop. Note...

  • Page 95: Troubleshooting

    Installer Manual Fleck 3900 - NXT - Troubleshooting Troubleshooting 10.1. Error detection Note 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 96 Installer Manual Fleck 3900 - NXT - Troubleshooting Problem Cause Solution Improper salt setting. Check salt usage and salt setting. Excessive salt See problem "Excessive water in consumption Excessive water in brine tank. brine tank" below. Determine if micro-switch or Controller cycles Maladjusted, broken or shorted controller is faulty and replace it,...

  • Page 97: Programming Error

    Installer Manual Fleck 3900 - NXT - Troubleshooting Problem Cause Solution Check controller program and Controller is not programming positioning of controls. Replace correctly. power head assembly if not positioning properly. Remove power head assembly and Drain flows continuously inspect bore. Remove foreign Foreign material in valve body.

  • Page 98: Examples Of Error Displayed

    Installer Manual Fleck 3900 - NXT - Troubleshooting 10.3. Examples of error displayed • The unit 2 has been reset; DETECTED ERROR = → Reprogram the unit. RESET UNIT DETECTED  • there is no message from unit 3; ERROR →...

  • Page 99: Spare Parts And Options

    Installer Manual Fleck 3900 - NXT - Spare parts and options Spare parts and options 11.1. BLFC parts list Assembly Min. order Item Part number Description quantity quantity BR16530 Flow control housing 19292SP O-ring 022 19053 Flow control retainer 1.5 to 7 gpm 19279 Flow control retainer 10 to 20 gpm 12086SP...

  • Page 100: Valve Parts List

    Installer Manual Fleck 3900 - NXT - Spare parts and options 11.2. Valve parts list 100 / 126 Ref. MKT-IM-015 / B - 08.06.2018...
  • Page 101 Installer Manual Fleck 3900 - NXT - Spare parts and options Assembly Min. order Item Part number Description quantity quantity PH3900-001 PH 3900 24V/50Hz grey w/o timer PH3900-002 PH 3900 adapt 24V/50Hz PH3900-007 PH 3900 adapt NXT PH3150-001 PH 3150 24V/50Hz grey without timer PH3150-002 PH 3150 NXT 24V/50Hz 60106-00...

  • Page 102: Upper Power Head Parts List

    Installer Manual Fleck 3900 - NXT - Spare parts and options 11.3. Upper power head parts list Assembly Min. order Item Part number Description quantity quantity 26637 Cover assy 3150/3900 upper grey 26260 Transformer 60VA 26259 Transformer 105VA 3900 17967 Liquid tight 25353 Guide cable &...
  • Page 103 Installer Manual Fleck 3900 - NXT - Spare parts and options Assembly Min. order Item Part number Description quantity quantity 16059SP Washer 16052SP Bushing 16053 Bracket brine side 23728SP Screw THM 6x12 40080SP Screw microswitch 10302SP Insulator limit switch 10218SP Microswitch 10872SP Screw motor mounting...

  • Page 104: Lower Power Head Parts List

    Installer Manual Fleck 3900 - NXT - Spare parts and options 11.4. Lower power head parts list Assembly Min. order Item Part number Description quantity quantity 16086 Bracket motor 3900 10872SP Screw motor mounting 11898SP Clip 3150/3900 BR11709 Connecting rod pin 18726-50SP Spacer indicator 19315...
  • Page 105 Installer Manual Fleck 3900 - NXT - Spare parts and options Assembly Min. order Item Part number Description quantity quantity 18963-39 Drive gear 3900 adapt 21361SP Screw TCHCM 8x16 BU26638 Cover assy grey 3900 lower 11080SP Screw flat head 16495 Cam assy 3900 lower BR42446 Harness lower drive (ex 40405)

  • Page 106: Injector Parts List

    Installer Manual Fleck 3900 - NXT - Spare parts and options 11.5. Injector parts list 106 / 126 Ref. MKT-IM-015 / B - 08.06.2018...
  • Page 107 Installer Manual Fleck 3900 - NXT - Spare parts and options Assembly Min. order Item Part number Description quantity quantity 18702 Fitting tube ½” NPT 5/8” 19677SP Screw 16341-01 Inj cover 1800 15246-01SP O-ring 560 CD 15128-04 Injector nozzle # 4 15128-05 Injector nozzle # 5 15128-06...

  • Page 108: Top Mounted Valve Distribution Systems Parts List

    Installer Manual Fleck 3900 - NXT - Spare parts and options 11.6. Top mounted valve distribution systems parts list Caution Respect the valve sizing configuration to avoid the resin to leak through the valve. Note The 0.2 mm and 0.3 mm slots are used for softening systems and the 0.5 mm slots are used for filtering systems.

  • Page 109: Tanks 42" - 48" Flanged 6", Tm, Slots 0.3 Mm

    Installer Manual Fleck 3900 - NXT - Spare parts and options 11.6.2. Tanks 42" - 48" flanged 6", TM, slots 0.3 mm Assembly Min. order Item Part number Description quantity quantity A-TF42-025 Distribution system assy, tanks 42" A-TF48-025 Distribution system assy, tanks 48" A-3100-11C Adapter A-PIPE-90...

  • Page 110: Side Mounted Valve Distribution Systems Parts List

    Installer Manual Fleck 3900 - NXT - Spare parts and options 11.7. Side mounted valve distribution systems parts list Caution Respect the valve sizing configuration to avoid the resin to leak through the valve. 11.7.1. Tanks 42" - 63" flanged 6", SM, top distribution, DN80 connections Assembly Min.
  • Page 111 Installer Manual Fleck 3900 - NXT - Spare parts and options Assembly Min. order Item Part number Description quantity quantity Distribution system assy, DN80, slots 0.2 mm,  A-2755-FU tanks 55" Distribution system assy, DN80, slots 0.5 mm, A-2555-FU tanks 55" Distribution system assy, DN80, slots 0.2 mm, ...

  • Page 112: Tanks 42" - 63" Flanged 6", Sm, Bottom Distribution, Dn80

    Installer Manual Fleck 3900 - NXT - Spare parts and options 11.7.2. Tanks 42" - 63" flanged 6", SM, bottom distribution, DN80 connections Assembly Min. order Item Part number Description quantity quantity Distribution system assy, DN80, slots 0.2 mm,  A-2742-FL tanks 42"...
  • Page 113 Installer Manual Fleck 3900 - NXT - Spare parts and options Assembly Min. order Item Part number Description quantity quantity A-2727-10 Filter nozzle A-BTC8-30 Hub cap A-TH02-423 Lateral 423 mm, slots 0.2 mm, tanks 42" A-TH05-423 Lateral 423 mm, slots 0.5 mm, tanks 42" A-TH02-485 Lateral 485 mm, slots 0.2 mm, tanks 48"...

  • Page 114: Tanks 42" - 63" Flanged 6", Sm, Top & Bottom Distribution, Dn100

    Installer Manual Fleck 3900 - NXT - Spare parts and options 11.7.3. Tanks 42" - 63" flanged 6", SM, top & bottom distribution, DN100 connections Assembly Min. order Item Part number Description quantity quantity Distribution system assy, DN100, slots 0.2 mm,  A-ST10042-02 tanks 42"...
  • Page 115 Installer Manual Fleck 3900 - NXT - Spare parts and options Assembly Min. order Item Part number Description quantity quantity A-3100-09C Adapter DN100 A-3100-05C Prolongation ATD-H80-00 A-TH02-361 Lateral 361 mm, slots 0.2 mm, tanks 42" A-TH05-361 Lateral 361 mm, slots 0.5 mm, tanks 42" A-TH02-423 Lateral 423 mm, slots 0.2 mm, tanks 48"...

  • Page 116: Safety Brine Valves List

    Installer Manual Fleck 3900 - NXT - Spare parts and options 11.8. Safety brine valves list Assembly Min. order Item Part number Description quantity quantity SBV 2310 union PVC female 1" to be glued - male 28182 1" BSP 11.9. Air checks list Assembly Min.

  • Page 117: Dlfc Parts List

    Installer Manual Fleck 3900 - NXT - Spare parts and options 11.10. DLFC parts list Assembly Min. order Item Part number Description quantity quantity 25580-XX 2" DLFC assy 3150/3900 - 30 to 100 gpm 25177 Screw 27913-21 2" Flow control housing - BSP 16804 O-ring 16650...

  • Page 118: Meters Parts List

    Installer Manual Fleck 3900 - NXT - Spare parts and options 11.11. Meters parts list Assembly Min. order Item Part number Description quantity quantity 27129 Meter assy 3” electronic 3900 12112SP Screw hex HD 10-24x1/2 (mechanical cover) Screw hex washer 10-24x5/8 18-8SS (electronic 12473SP cover) 16400...

  • Page 119: Tank Adapter, Top Mounted, Threaded 6" List

    Installer Manual Fleck 3900 - NXT - Spare parts and options 11.12. Tank adapter, top mounted, threaded 6" list Assembly Min. order Item Part number Description quantity quantity 18041 Tank adapt assy 3900 TM threaded 6” 21408SP Tank adapt screw 3900 16345-01SP O-ring 16257SP...

  • Page 120: Tank Adapter, Tm, Flanged 6" List

    Installer Manual Fleck 3900 - NXT - Spare parts and options 11.13. Tank adapter, TM, flanged 6" list Assembly Min. order Item Part number Description quantity quantity 18925 Tank adapt assy 3900 TM flanged 6” 25175SP Screw THM 8X65 16345-01SP O-ring BU16800 O-ring...

  • Page 121: Sm Adapter List

    Installer Manual Fleck 3900 - NXT - Spare parts and options 11.14. SM adapter list Assembly Min. order Item Part number Description quantity quantity 18926 Tank adapt assy 3900 SM 21408SP Tank adapt screw 3900 16345-01SP O-ring BU16800 O-ring 16257SP Flange segment 18584-22 Side mount adapter...

  • Page 122: Kit Meter & Meter Cables List

    Installer Manual Fleck 3900 - NXT - Spare parts and options 11.15. Kit meter & Meter cables list Assembly Min. order Item Part number Description quantity quantity 25353 Guide cable & cable assy 3900/9500 18717 Guide cable 3900 17967 Liquid tight 15513 Cable meter 444 mm 19121-01...

  • Page 123: Other Components List

    Installer Manual Fleck 3900 - NXT - Spare parts and options 11.16. Other components list Mixing assembly Kit 78 Assembly Min. order Item Part number Description quantity quantity BU61564-10 Mixing assy 1" industrial 28181 PVC union female 1" BSP 16453 Pipe fitting PVC 11.17.

  • Page 124: Disposal

    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 125 Installer Manual Fleck 3900 - NXT - Disposal PAGE INTENTIONALLY LEFT BLANK Ref. MKT-IM-015 / B - 08.06.2018 125 / 126...
  • Page 126 www.pentairaquaeurope.com...

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