Fleck 7000SXT Issues

Discussion in 'Water Softener Forum, Questions and Answers' started by Xav1029, Jul 10, 2018.

  1. Xav1029

    Xav1029 New Member

    Joined:
    Jul 10, 2018
    Location:
    Tampa, FL
    After reading through numerous helpful threads, I decided to ask for your advice because I cannot get my softener to function properly. Specs and settings are as follows:

    Fleck 7000SXT
    64,000 capacity, 2.0 cu ft
    City water, 14-17 grain hardness depending on when I test it.
    4 adults, 1 todler
    #0 Red injector
    0.125 BLFC

    DF = Gal
    VT = dF2b
    CT = Fd
    C = 40.0
    H = 22.0
    RS = cr
    DO = 28
    RT = 2:00
    B1 = 8.0
    Bd = 110.0
    B2 = 5.0
    RR = 5.0
    BF = 35.0
    FM = t1.2

    We have had the softener for about a year, and it worked OK for the most part. We were getting some harder (6 grain) water at the end of the cycles, so I decided to inspect the hoses to make sure nothing was clogged. Everything worked fine for one cycle after that, but now it is not drawing any brine whatsoever during the BD cycle. It won't even draw from a cup if I disconnect from the float switch. I have checked for clogged drain lines and cleaned the injector and blfc.

    Do my settings look OK? What else should I check to figure out why the system is not drawing any brine?

    Thanks\
     
  2. ditttohead

    ditttohead Water systems designer, R&D

    Joined:
    Jan 9, 2012
    Occupation:
    Water systems designer, R&D, Technical Director
    Location:
    Ontario California
    You may want to rebuild the valve, it is a fairly simple procedure. Brine draw issues are usually a plugged drain line, bad injector, worn valve internals, or one of a dozen other possibilities.
     
    Xav1029 likes this.
  3. Sponsor

    Sponsor Paid Advertisement

     
    Xav1029 likes this.
  4. Reach4

    Reach4 Well-Known Member

    Joined:
    Sep 25, 2013
    Location:
    IL
    Make sure there is flow from the drain line during brine draw.

    During your cleaning the injector screen and injector etc, did you find crud?
     
  5. Xav1029

    Xav1029 New Member

    Joined:
    Jul 10, 2018
    Location:
    Tampa, FL
    There is some flow from the drain line during the BD cycle, but not as much as during backwash. I found some particles in the screen during cleaning, but nothing major. I did not add silicone grease when putting back together though. Could air be getting into system?
     
  6. Reach4

    Reach4 Well-Known Member

    Joined:
    Sep 25, 2013
    Location:
    IL
    A #0 injector should be sending about 0.3 gpm to the drain if no brine is being drawn. (see graphs in service manual.) That is a lot lower than the 3.5 gpm you get during backwash of a 12 inch tank.

    I would use silicone grease or release compound whenever you reuse or replace an o-ring or seal. I use Molykote 111 5.3 ounce tube. That is a lot. You want a very thin coat. This is not the cause of your problem however.

    https://www.danco.com/product/0-5-oz-silicone-faucet-grease/ Danco 88693 is probably available locally.

    Your test of removing the tube going to the float valve and putting it in a cup would seem to make that probabliy low; you had bypassed the locations of common leaks. I guess you could suck on the tube. If you suck air, then I would think that means an air leak.

    https://terrylove.com/forums/index....-technician-is-scratching-is-head-help.73584/ discusses a brine draw problem for a different softener.
     
  7. Xav1029

    Xav1029 New Member

    Joined:
    Jul 10, 2018
    Location:
    Tampa, FL
    Took apart the valve as suggested, cleaned everything, and put it all back together with a little lube and the system is drawing brine properly again. Appreciate the help!

    Could you guys tell me if my settings look OK?
     
  8. Reach4

    Reach4 Well-Known Member

    Joined:
    Sep 25, 2013
    Location:
    IL
    They are definitely reasonable...
    Your C is low compared to your BF number, so you are programming in some extra margin. For 6 pounds of salt per cuft, the BF would normally be 32 instead of 35. Here is a table that shows what C number you could chose for various BF numbers, if you like. So with BF=35, you could change C to 42.3.

    lb/cuft ; C= ; BF=
    5.063 ; 36.6 ; 27
    5.250 ; 37.2 ; 28
    5.438 ; 37.9 ; 29
    5.625 ; 38.6 ; 30
    5.813 ; 39.3 ; 31

    6.000 ; 40.0 ; 32
    6.188 ; 40.8 ; 33
    6.375 ; 41.5 ; 34
    6.563 ; 42.3 ; 35
    6.750 ; 43.1 ; 36
    6.938 ; 43.8 ; 37
    7.125 ; 44.6 ; 38
    7.313 ; 45.3 ; 39
    7.500 ; 46.1 ; 40
    7.688 ; 46.8 ; 41
    7.875 ; 47.5 ; 42
    8.063 ; 48.2 ; 43
    8.250 ; 48.9 ; 44
    8.438 ; 49.5 ; 45
    8.625 ; 50.2 ; 46
    8.813 ; 50.8 ; 47
    9.000 ; 51.3 ; 48
    9.188 ; 51.9 ; 49
    9.375 ; 52.4 ; 50
     
    Xav1029 likes this.
  9. Xav1029

    Xav1029 New Member

    Joined:
    Jul 10, 2018
    Location:
    Tampa, FL
    Thanks for your help! This chart comes in very handy.
     
Similar Threads: Fleck 7000SXT
Forum Title Date
Water Softener Forum, Questions and Answers Fleck 7000sxt Still Not Softening Feb 2, 2018
Water Softener Forum, Questions and Answers Trying to decide between Fleck 5600SXT and 7000SXT Mar 31, 2017
Water Softener Forum, Questions and Answers Programming advice for Fleck 7000SXT Feb 12, 2017
Water Softener Forum, Questions and Answers New softener runs out of gas early - Fleck 7000SXT settings? Jan 29, 2017
Water Softener Forum, Questions and Answers Fleck 7000SXT - No Brine Draw Dec 20, 2016

Share This Page