Installer Manual Fleck 5812 - XTR - System sizing
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Ref. MKT-IM-019 / E - 14.10.2019
To calculate the brine draw duration:
Knowing the injector draw flow rate at the working pressure:
Note
Multiply the amount of salt in kg by 3 to get a approximation of the brine volume to draw.
To calculate slow rinse duration:
The volume of water to be used for slow rinse is given in the resin manufacturers specifications.
Generally speaking, it is advised that between 2 and 4 BV of water is used to perform the slow rinse
after brine draw. The slow rinse cycle allows brine to be pushed slowly through the resin bed, allowing
the resin to be in contact with brine for sufficient time and therefore to be regenerated.
Refer to the injector curve at the common working pressure to determine the slow rinse duration.
To calculate fast rinse duration:
The fast rinse is aimed at eliminating an excess of salt in the resin bed and also recompacting the
resin in the tank.
Depending on the valve type, the fast rinse flow rate is controlled by the DLFC or it has about the same
flow rate as in service. The fast rinse velocity can be the same as the service velocity, and the volume
of water to be used for the fast rinse is generally between 1 and 10 BV depending on the salt dosage.
T
brine draw
= V
brine
/ Q
draw
with:
T
brine draw
: brine draw duration [min]
V
brine
: brine volume to be drawn [L], see Refill calculation page 39
Q
draw
: injection draw flow rate [L/min]
T
slow rinse
= (N
BVsr
x BV) / Q
SR
with:
T
slow rinse
: slow rinse duration [min]
N
BVsr
: number of bed volume for slow rinse
BV: bed volume [L]
Q
SR
: injector slow rinse flow rate [L/min]
T
fast rinse
= (N
BVfr
x BV) / Q
DLFC
with:
T
fast rinse
: fast rinse duration [min]
N
BVfr
: number of bed volume for fast rinse
BV: bed volume [L]
Q
DLFC
: drain line flow controller size [L/min]
Summary of Contents for FLECK 5812 XTR
Page 1: ...INSTALLER MANUAL WATER PURIFICATION FLECK 5812 XTR...
Page 18: ...Installer Manual Fleck 5812 XTR Description 18 132 Ref MKT IM 019 E 14 10 2019 3 2 2 Base 4...
Page 108: ...Installer Manual Fleck 5812 XTR Maintenance 108 132 Ref MKT IM 019 E 14 10 2019...
Page 110: ...Installer Manual Fleck 5812 XTR Maintenance 110 132 Ref MKT IM 019 E 14 10 2019...
Page 132: ...www pentairaquaeurope com...
