Pentair FLECK 3150 NXT - Salt amount definition

Installer Manual Fleck 3150 - NXT - System sizing
Ref. MKT-IM-010 / B - 28.05.2018 31 / 122
To calculate the refill duration:
The refill flow rate is controlled by the refill controller (BLFC). The relation between the BLFC size,
the tank size and the resin volume is given in the valve specifications.
To calculate the refill duration:
Note
When calculating the time required to draw the brine, take into account that the volume of
brine [V
brine
] will be 1.125 bigger than the volume of water refilled.
4.3. Salt amount definition
The salt settings are controlled through the controller programming. See 4.2.3. Resin exchange
capacity and capacity of the unit, page 26.
T
refill
= V
WB
/ Q
BLFC
with:
T
refill
: refill duration [min]
V
WB
: Volume of water to be refill to prepare the brine [L]
Q
BLFC
: BLFC size [L/min]
V
WB
= D
Salt
x BV / S
sol
with:
V
WB
: Volume of water to be refill to prepare the brine [L]
D
Salt
: Salt dosage per litre of resin [g/L]
BV: Bed volume [L]
S
sol
: 360g/L - Solubility of salt per litre of water