BWT Duo-DVGW 2 Einbau- Und Bedienungsanleitung Seite 32

EN
Filter
0000
Σ m
3
4 Installation
The pipeline network must be flushed before the unit can be installed.
You must check whether a mineral metering device needs to be installed
downstream from the water softener for the purpose of preventing cor-
rosion.
Use corrosion-resistant pipe materials for installation. Pay attention to
corrosion-causing chemical properties when different pipe materials are
combined (mixed installation), even in the inflow direction upstream of
the water softener.
A protective filter must be installed in the direction of flow 1 m upstream
of the unit. The filter must be functional before the softener is installed.
This is the only way to ensure that dirt and corrosive products do not
enter the water softener.
Test sample extraction points must be installed upstream and down-
stream of the unit, according to the specifications of VDI 6023.
The hose attached to the overflow point of the regenerative container
and the flushing water hose must be routed at an incline to the sewage
system or connected to a pump.
According to EN 1717, the flushing water hose and the overflow hose
must be connected to the sewage system at a specified distance above
the highest possible waste water level. (Distance is greater than the
diameter of the drain pipe).
If the flushing water is fed into a pump, it must be designed for a water
volume of at least 2 m /h or 35 l/min for units for building services and at
3
least 3 m 3 /h or 50 l/min for Rondomat and AQA perla professional units.
If the pump is used for other units concurrently, it must be of a larger
size to suit the units' water output volumes.
The pump must be salt-water resistant.
5 Operation
The performance specifications of the unit must match the expected
usage conditions. Related information can be found in DIN 1988-200
and in the technical specifications.
After periods in which little or no water is tapped, e.g. during holidays,
you must fully open the tap for at least 5 minutes before you can use the
water again (see the section on stoppages in the operating instructions).
The microbiological quality of the softened water is also determined by
the quality of the regenerative used.
32
Metering unit
flushing water and over-
flow hoses
> 20 mm