Fleck 5800 SXT programming

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ErnieO

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I have a 1 ft3 Fleck 5800 Sxt softener. My hardness in water is 9 gpg on city water and there are 4 people in the home. So I have about 2,700 grains to recover per day.

I'm trying to figure out the proper control valve programming settings for capacity, BW, BD, RR & BF.

So... I have a 32,000 grain unit. At an 8lb salting I can recover 24,000 grains. Should the Capacity be set at 32 for the total capacity or 24 if I'm using an 8lb salting?

Is there a formula to calculate the best backwash length, brine draw length, and rapid rinse length? Currently I just have it set at 10/60/10.

For the brine fill to get an 8lbs salting with a blfc of .25gpm i get an 11min fill time.

Any input would be appreciated.
 

Reach4

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following changes C to compensate for brine fill rounding.
System info (not programmed)
salt lb/cuft = 7.5 ; A choice ( efficiency vs capacity)
BLFC = 0.5 ; Brine Refill rate GPM
cubic ft resin = 1 ; ft3 resin = (nominal grains)/32,000
Compensated hardness = 10 ; including any compensation
People = 4 ; gallons affects reserve calc
Estimated gal/day = 240 ; 60 gal per person typical calc
Estimated days/regen = 10.00 ; Computed days including reserve

Fleck 5600SXT Settings:
DF = Gal ; Units
VT = dF1b ; Downflw/, Single Backwash, black cam
CT = Fd ; Meter Delayed regen trigger
NT = 1 ; Number of tanks
C = 23 ; capacity in 1000 grains
H = 10 ; Hardness-- compensate if needed
RS = rc ; rc says use gallons vs percent
RC = 240 ; Reserve capacity gallons
DO = 30 ; Day Override (30 if no iron)
RT = 2:00 ; Regen time (default 2 AM)
BW = 5 ; Backwash (minutes)
Bd = 60 ; Brine draw minutes
RR = 5 ; Rapid Rinse minutes
BF = 5 ; Brine fill minutes
FM = ____0.7 ; https://terrylove.com/forums/index.php?attachments/img_fleck5600sxt_flow-png.31592/

=============================

Revised based on numbers from
https://terrylove.com/forums/index.php?threads/help-for-programming-fleck-5810.82673/#post-595983
The less salt per cubic ft, the more salt efficient, but more hardness breakthrough.
BLFC = 0.5
cubic ft resin = 1
Alternative C and BF pairs:
lb/cuft ; C= ; BF=
3.000 ; 13.8 ; 2
4.500 ; 18.0 ; 3
6.000 ; 21.0 ; 4 #less salt
7.500 ; 23.3 ; 5 #used above
9.000 ; 25.2 ; 6 #softer water.
10.500 ; 26.6 ; 7
12.000 ; 27.9 ; 8
13.500 ; 28.9 ; 9
15.000 ; 29.8 ; 10 #uses more salt. Silkier water.
 

ErnieO

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Thanks for the response. So the C should be set to match the BF recovery. In your example, a 6lb salting will recover 21,000 grains. Therefore C will be set at 21 and BF will be set to 4 if BLFC is .5gpm to give us the 2gallons needed.

Thanks again.
 
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