12
EN
3 Intended use
3.1 Proper use
This product is intended for the partial softening of
drinking and service water. It is also designed to
prevent malfunction and damage caused by calci-
devices, boilers and other equipment.
match the expected usage conditions. For more
information, see DIN 1988-200 and the technical
data in this installation and operating manual (see
chapter 73).
If the product is intended for a commercial appli-
cation, a consultant from the manufacturer must
conduct a test and issue an approval.
Operation of the product only with regular function
checks and the performance of the maintenance
measures required to ensure the safe operating
condition of the product in accordance with the
operating conditions for planning and construction.
3.2 Foreseeable misuse
Failure to use the product over a longer period of
time (7 days as per DIN EN 806-5).
Failure to maintain the ambient conditions and
operating conditions (see chapter
73).
Failure to comply with the maintenance and ser-
The use of unauthorised consumables and
spare parts.
3.3 Disclaimer
The manufacturer is released from any liability if the
customer intentionally or forcibly removes guards
or circumvents the same, or if the customer does
not follow the instructions in this operating manual
or on the system.
3.4 Other applicable documentation
Data protection notice
Material safety data sheets
4 Function
The BWT Perla Duplex product range includes
various duplex water softeners based on ion ex-
exchange material.
4.1 Operation
Adaptive parallel operation via two columns
allows for maximum soft water availability and
minimises stagnation in the columns.
Regeneration is triggered volumetrically (depend-
ing on the quantity of water). This means that no
remaining supply of softened water is discarded
during regeneration.
During regeneration, only one column is availa-
ble, which handles the entire softening process.
Ideally, the regeneration time occurs at night,
as water consumption is usually lower during
this period.
If the capacity falls below 50% before the query
time, proportional regeneration starts immedi-
ately.
If the capacity does not fall below 50% until after
the query time, the control system assumes that
the regeneration time.
Regeneration begins immediately if the capacity
is exhausted; otherwise it starts at the selected
regeneration time.
4.2 Regeneration
Exchange of hardness forming substances Ca
and Mg ions for Na ions from the regenerative at
the ion exchanger.
A precision brine meter measures out the brine
required.
The product is equipped with a device that
disinfects the ion exchange material during
regeneration.
By measuring data acquisition during brine
extraction, the regeneration process is adapted
to the respective pressure conditions, the regen-
erative and regeneration water consumption is
reduced to the required minimum.
The optimised brine preparation process produc-
es as much brine as needed for regeneration in
less than 0.5 hours.
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