# Fleck 5800 SXT programming

### Users who are viewing this thread

#### ErnieO

##### New Member
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

##### Well-Known Member
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
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

##### New Member
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.

#### Reach4

##### Well-Known Member
Yes.

Replies
34
Views
681
Replies
11
Views
601
Replies
18
Views
467
Replies
4
Views
580
Replies
1
Views
1K
Hey, wait a minute.

This is awkward, but...

It looks like you're using an ad blocker. We get it, but (1) terrylove.com can't live without ads, and (2) ad blockers can cause issues with videos and comments. If you'd like to support the site, please allow ads.