Can you guys validate my numbers for a new install?

[Brent J]

I just recently purchased and installed a Fleck 7000sxt with 2.5cf of 10% cross-linked resin.

I'm on city water with 22 grains or hardness and 0 -.3 ppm of iron and magnesium.

We have 4 people in our household and I calculated a capacity of about 6000 grains of hardness removal per day.

My settings are as follows and based on my calculations the system should regenerate every 3 - 5 days.

C: 32000
H: 25
RS: RC
RC: 240
DO: 14
RT: 12:00
B1: 5
BD: 60
B2: 5
RR: 5
BF: 24 (BLFC .125 GPM for a salt dose of 8#)

Thanks for looking

 

[ditttohead]

2.5 cubic feet?

7000SXT 13x54 (2.5 Cu. Ft.) Softener
Your 80,000 grain system has been factory programmed as follows:
8# of salt per cu. ft. = 20# of salt per regeneration
24,000 grains capacity per cu. ft. = 60,000 grains total capacity
Raw water hardness=20 grains

1: set time to 12:01 P.M.
2: push “regen” button
3: push and hold ^ v buttons for 7 seconds to enter master program mode
Push “regen” button between each step to get to next step
4: DF set to Gal,
5: VT set to dF2b,
6: CT set to Fd
7: C Set to 60.0
8: H set to 22
9: RS set to RC
10: RC set to 240
11: DO set 14
12: RT set to 2:00
13: B1 set to 10
14: BD set to 60
15: B2 set to 5
16: RR set to 10
17: BF set to 54 for .125 BLFC
18: FM set to t1.2

The DLFC should be 4.0 GPM

 

[Sponsor]

 

[Brent J]

2.5 cubic feet?

7000SXT 13x54 (2.5 Cu. Ft.) Softener
Your 80,000 grain system has been factory programmed as follows:
8# of salt per cu. ft. = 20# of salt per regeneration
24,000 grains capacity per cu. ft. = 60,000 grains total capacity
Raw water hardness=20 grains

1: set time to 12:01 P.M.
2: push “regen” button
3: push and hold ^ v buttons for 7 seconds to enter master program mode
Push “regen” button between each step to get to next step
4: DF set to Gal,
5: VT set to dF2b,
6: CT set to Fd
7: C Set to 60.0
8: H set to 22
9: RS set to RC
10: RC set to 240
11: DO set 14
12: RT set to 2:00
13: B1 set to 10
14: BD set to 60
15: B2 set to 5
16: RR set to 10
17: BF set to 54 for .125 BLFC
18: FM set to t1.2

The DLFC should be 4.0 GPM

Yes, 2.5 cubic feet and the vendor lists the backwash flow control rate as 3.5 gallons and I'm not sure if that equates to the drain line flow control (DLFC) or not.

I did change the salt setting to 3# per cubic foot for a total of 8# per regeneration based on my calculations (8/2.7/.125=23.7 rounded up to 24 for the brine fill cycle)

 

[ditttohead]

3 pounds per CF is not highly recommended. Iron fouling is more likely to occur with lower salt settings. Also your water quality will suffer. Hardness leakage is more pronounced at lower salt settings. Most companies tend to go between 6 and 9 pounds per CF to ensure very happy customers. But... it is up to you.

Backwash Flow control of 3.5 should be fine assuming your water temperature is not above 70 degrees.

 

[Brent J]

That makes sense

I bumped it up to 6# and the capacity to 50k

Should I also increase the brine draw time since the brine fill time is so close now? Does the brine draw and fill both flow at the same .125 GPH rate?

 

[ditttohead]

The brine draw is unrestricted, the BLFC is a directional flow control. Brine draw is based on the injector and water pressure.