Installation Conditions; General; Installation Site And Environment; Feed Water - BWT Bewamat 25A Einbau- Und Bedienungsanleitung

EN
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Installation conditions

5.1

General

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 or if the floor drain leads into
an electrical pump, there must be a safety device
that shuts off the water supply when there is no
current (e.g. BWT Aqua Stop) to prevent damage
by water.
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.
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5.3

Feed water

The hard water to be fed into the unit must always
meet the specifications of the Trinkwasserverord-
nung (German drinking water ordinance) 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 Trinkwasser-verordnung
(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 technical specifications). 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 (see chapter 12, Technical specifications).
During pressure fluctuations and surges, the sum
of the pressure surge and the standing pressure
must not exceed the nominal pressure. The positi-
ve 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 chlori-
ne/chlorine dioxide will cause premature ageing of
the ion exchange material. A water softener reduces
the concentration of free chlorine and chlorine dioxi-
de. In other words, the concentration in the outflow
of a water softener is generally considerably lower
than in the inflow.