Function; Installation Requirements - BWT AQA Perla Installation And Operating Manual

Function

Function
Function Function Function
AQA Perla is a duplex softening unit that functions
in accordance with the ion exchange principle. The
unit is run with columns continually changing at
short intervals. This method of operating ensures
that softened water is even available during a re-
generation procedure, while the frequent column
change minimises stagnation times. In terms of
chemical and microbiological parameters, this leads
to significantly better water quality than with con-
ventional alternating softening units.
Regeneration is triggered volumetrically (depends
on the quantity of water).
Very brief salt dilution times and short regenera-
tion periods are achieved thanks to the special
salt hopper for storing and dissolving salt.
The hardness of the drinking water and the de-
sired hardness of blended water on-site is entered
into the electronic system when the unit is started-
up. All other unit parameters are stored in the elec-
tronic system. All unit data is preset and unit pa-
rameters can be queried. The remaining capacity
is displayed in litres or in bar-graph form. The flow
quantity is displayed in l/h during operation.
The unit is equipped with a device that disinfects
the ion exchanger during the regeneration proc-
ess. Spring-loaded non-return valves protect all
water connections on the inlet side of the unit (in
compliance with DVGW). This eliminates the need
for a system or pipe isolator.
The system complies with all relevant national and
international standards.
Electrical power failure Electrical power failure
Electrical power failure Electrical power failure Electrical power failure
In case of an electrical power failure of more than
8h the softener restarts with an automatic regen-
eration of both columns.
All settings are permanently stored and do not have
to be reentered after an electrical power failure.

Installation Requirements

Installation Requirements
Installation Requirements Installation Requirements Installation Requirements
Observe all applicable installation regulations, general
guidelines, hygiene requirements, and technical speci-
fications.
Softening systems may not be installed in water sup-
ply systems which provide water for fire extinguishing
purposes.
The pipe network must be flushed before the unit is
installed.
The hard water to be fed into the unit must always meet
the specifications of the German drinking water regu-
lations or EU directive 98/83 EC. The total dissolved
iron and manganese may not exceed 0.1mg/l. The
hard water to be fed into the unit must always be free of
air bubbles; if necessary, a bleed device must be in-
stalled.
Continuous operation of the softening unit with water
containing chlorine or chlorine dioxide is possible if the
concentration of free chlorine/chlorine dioxide does not
exceed 0.5mg/l.
However, continuous operation with water containing
chlorine/chlorine dioxide causes the ion exchanger resin
to age prematurely. A softening unit reduces the con-
centration of free chlorine and chlorine dioxide. In other
words, the concentration in the outflow of a softening
unit is generally considerably lower than in the inflow.
The unit should be sized so that at least daily regen-
eration is necessary based on the throughput. If
water consumption is reduced, e.g. during holidays,
a shut-off device must be fully opened for at least 5
minutes before water can be used again (DIN 1988
sections 4 and 8).
Use corrosion-resistant pipe materials for installation.
Observe corrosion-causing chemical properties in the
combination of different pipe materials (mixed installa-
tion), even in the direction of the flow upstream of the
softening unit.
A protective filter must be installed no further than 1m
upstream from the unit. The filter must be functional
before the water softening unit is installed. This is the
only way to ensure that dirt and corrosive products
cannot enter the softener.
You must check whether a mineral dosing device should
be installed downstream from the unit for the purpose
of preventing corrosion.
GB GB GB GB GB
1m 1m 1m
1m
5 5 5 5 5