BWT Bewamat COMB 1 Produktdatenblatt Seite 10

4 Installation conditions
4.1 General
The unit must be installed as described in the installation guide in com-
pliance with the general requirements for the supply of water in Germany
("AVB Wasser") V, section 12.2 by a water supply company or by a party
registered in the water supply company's index of fitters.
Observe all applicable local installation regulations, general guidelines,
sanitary requirements and technical specifications.
4.2 Installation site and environment
Filter units must 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
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 no floor drain is available or if the floor drain is drained using an electric
pump, a customer-supplied safety device that shuts off the water supply
without a current (e.g. BWT AQA Stop including moisture sensor) must
be installed to prevent water damage.
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.
4.3 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, see table "5.1 Feed water requirements", page 6.
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 consumption as defined in
the German drinking water ordinance ("Trinkwasserverordnung"), the
ambient temperature must not exceed 25°C.
If the treated water is intended for industrial purposes only, the ambient
temperature must not exceed 40°C.
The maximum operating pressure of the unit must not be exceeded;
see "5 Technical data", page 5. If the network pressure is higher,
a pressure reducer must be installed upstream of the unit.
A minimum operating pressure is required for the unit to function correctly;
see "5 Technical data", page 5.
During pressure fluctuations or surges, the sum of the pressure surge and
the standing pressure must not exceed the nominal pressure; the positive
pressure surge must not exceed 2 bar and the negative pressure surge must
not be less than 50% of the self-adjusting flow pressure.
Continuous operation of the multi-target filter with water containing chlo-
rine 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/chlorine dioxide
will cause premature ageing of the ion exchange material. A water sof-
tener reduces the concentration of free chlorine and chlorine dioxide. In
other words, the concentration in the outflow of a filter unit is generally
considerably lower than in the inflow.
4.4 Installation
The pipeline network must be rinsed before the product can be installed.
You must check whether a mineral metering device needs to be installed
downstream from the product for the purpose of preventing corrosion.
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 direction of flow upstream of
the filter unit.
The multi-target filter is not suitable for producing drinking water from wa-
ter with unknown origins. Where necessary, a coarse sediment collector
(strainer) must be installed upstream of the product.
Suitable test sample extraction points must be installed upstream and
downstream of the product in accordance with the specifications of
VDI 6023.
The hose attached to the overflow point of the regenerative container
and the rinsing water hose must be routed at an incline to the sewage
system or connected to a pump.
According to EN 1717, the rinsing 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, the pump must be designed for a
water volume of at least 2 m /h or 35 l/min for units for building services
3
and at least 3 m /h or 50 l/min for building technology and industrial
3
engineering units.
If the pump is also used for other plants simultaneously, it must be sized
larger by a factor of their water output quantities.
The pump must be resistant to salt water.
4.5 Operation
The product must match the expected usage conditions. For more
information, see the technical data.
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.
The microbiological quality of the outlet water is also determined by the
quality of the regenerative used.
4.6 Functional and warranty conditions
The product requires regular functional monitoring, maintenance and
replacement of important parts after certain time intervals.
The amounts of metering substance and regenerative necessary are sub-
ject to the level of consumption, which depends on operating conditions.
The product must be cleaned regularly and also disinfected if necessary.
See the installation and operating instructions for the maintenance inter-
vals. We recommend that you enter into a service agreement.