Installer Manual Fleck 5812 - XTR - System sizing
Ref. MKT-IM-019 / E - 14.10.2019
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4.2.5. Cycle time calculation
From this point, the volume of resin, the tank size, the capacity of the softener and the valve
configuration are determined. Next step is to calculate the regeneration cycle duration, which
depends on the valve configuration and once again on the resin specifications.
Note
Preprogrammed cycle times are only factory default programming that need to be adjusted
to fit the system requirements.
For cycle time calculation the valve configuration must be known, which depends on:
•
the tank size;
•
the resin specifications for the velocity for backwashing the resin bed;
•
the velocity of water for brine draw, slow rinse and fast rinse.
Further information needed for cycle time calculation are:
•
the resin volume previously determined;
•
the salt amount used per regeneration;
•
the volume of water to use for backwash, brine draw, slow rinse and fast rinse.
To calculate the backwash duration:
Note
The typical value of the volume of water to be used for backwash is between 1.5 and 4 times
the bed volume, depending on the inlet water quality.
T
backwash
= (N
BVbw
x BV) / Q
DLFC
with:
T
backwash
: backwash duration [min]
N
BVbw
: number of bed volume for backwash
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...
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