Installation Conditions; General Information; Installation Site And Environment; Feed Water - BWT AQA perla XL Einbau- Und Bedienungsanleitung

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Installation conditions

5.1

General information

The unit must be installed as described in the in-
stallation instructions and in compliance with AVB
Wasser V, §12.2 (general requirements for the
supply of water in Germany). It must be installed
by a water utility company or by an installation
company registered in the water utility company's
index of installers.
Observe all applicable local installation regulations,
general guidelines, sanitary requirements and tech-
nical specifications.
5.2

Installation site and environment

Water softeners may not be installed in systems
that provide water for fire extinguishing purposes.
The installation site must be kept free of frost, must
protect the unit from chemicals, paint, solvents
and fumes, must be structurally waterproofed in
accordance with DIN 18195-5 and must allow for
easy connection to the water supply system.
A connection to the sewage system, a floor drain
and a separate mains connection (230 V/50 Hz)
must be located in the immediate vicinity.
If there is no floor drain, the Aquastop safety function
integrated into the water softener (available with
some models) or the internal Aquastop function
may suffice.
However, this is at the property insurer's discretion.
It is the unit operator's responsibility to clarify this.
If there is no floor drain and the water softener
does not have an integrated Aqua Stop function, a
separate safety device will have to be installed on
site in the direction of flow upstream of the softener.
This safety device (e.g. external BWT Aqua s top) has
to shut off the water supply when there is no current
in order to prevent unintended water leakage from
the water softener if the unit is damaged.
The rated mains power (230 V / 50 Hz) and the
required operating pressure must be present at
all times. A separate means of protection against
a shortage of water is not provided and must be
installed on site if desired.
5.3

Feed water

The hard water to be fed into the unit must always
meet the specifications of the German Drinking
Water Ordinance ["Trinkwasserverordnung"] or EU
Directive 98/83/EC. The total dissolved iron and
manganese may not exceed 0.1 mg/l. The hard
water to be fed into the unit must always be free
of air bubbles. Install a bleed device if necessary.
If the treated water is intended for human con-
sumption as defined in the German Drinking Water
Ordinance, the ambient temperature must not
exceed 25 °C.
If the treated water is intended for industrial pur-
poses only, the ambient temperature must not
exceed 40 °C.
The unit's maximum operating pressure must never
be exceeded (see chapter 12, technical specifica-
tions). If the network pressure is higher, a pressure
reducer must be installed upstream of the unit.
The unit requires a minimum operating pressure
to function correctly (see chapter 12, technical
specifications).
The optimal operating pressure is between 3 and
6 bar.
During pressure fluctuations and surges, the sum
of the pressure surge and the standing pressure
must not exceed the nominal pressure. The po-
sitive pressure surge must not exceed 2 bar and
the negative pressure surge must not be less than
50 % of the self-adjusting flow pressure (see DIN
1988-200/3.4.3).
Continuous operation of the water softener with wa-
ter containing chlorine or chlorine dioxide is possible
if the concentration of free chlorine / chlorine dioxide
does not exceed 0.5 mg/l.
Continuous operation with water containing chlorine
or chlorine dioxide can lead to premature ageing
if an organic ion exchange material is used. A
water softener can reduce the concentration of
free chlorine and chlorine dioxide. In other words,
the concentration in the outflow of a water softener
is generally considerably lower than in the inflow.
EN
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