Intended Use; Foreseeable Misuse; Disclaimer; Other Applicable Documentation - BWT Rondomat Duo-DVGW 2 Einbau- Und Bedienungsanleitung

3

Intended use

For softening or partial softening of drinking water in multi-family houses,
housing areas, hospitals, and service water, process water, boiler
feed water, cooling water and air conditioning water and for reducing
malfunctions and damage due to lime in water pipes and connected
water-carrying system components.
3.1

Foreseeable misuse

Operating the unit with systems other than those specified in this do-
cumentation.
Failure to comply with the operating and ambient conditions specified
in section 12.
Not adhering to the prescribed maintenance and service intervals.
Using spare parts and consumables not approved by BWT.
3.2

Disclaimer

The manufacturer is released from any liability if the customer intentio-
nally or forcibly removes guards or safety devices, if the customer wilfully
modifies or circumvents the same, or if the customer does not follow the
instructions in this operating manual or on the system.
3.3

Other applicable documentation

Observe all documents from suppliers that were included with delive-
ry. These are considered part of this documentation and must not be
changed or removed.
4

Function

4.1

General

Rondomat Duo is a duplex water softener that functions using ion ex-
change. It is filled with organic ion exchange material.
Softened water is available during a regeneration process.
Regeneration is triggered volumetrically (depending on the quantity
of water). This means that no remaining supply of softened water is
discarded during regeneration.
Rondomat Duo-DVGW only:
Spring-loaded non-return valves protect all connections on the upstream
side of the unit. This eliminates the need for a system or a pipe isolator.
4.2

Operation

The mode of operation is consumption dependent. The ion exchange
columns are perfused on an alternating basis. This alternation maximises
softened water availability and minimises stagnation in the columns.
The settings are retained in the event of a power failure during operation.
The date and time are stored for at least 5 years.
4.3 Regeneration
A precision brine meter measures out the brine required.
A special salt dissolution and brine cavity within the regenerative contai-
ner is used to achieve the shortest salt dissolution times, and therefore
extremely short regeneration intervals.
A float switch integrated in the regenerative container indicates when
the regenerative is running low.
Rondomat Duo-DVGW only:
The unit is equipped with a device that disinfects the ion exchange
material during regeneration.
Additionally for Duo-I BOB only:
The unit is equipped with larger or two regenerative containers to extend
the refill intervals.
4.4 Operation
The operation can be carried out by Display and keyboard.
During start-up, you must enter the hardness of the local drinking water.
All other unit parameters are stored in the control unit. All unit data is
pre-set and unit parameters can be queried.
The unit capacity is displayed as a flow volume in l/h during operation.
The remaining capacity is displayed in liters or in bar-graph form.
4.5

Stagnation management

If the capacity is not used up within 96 hours, the control unit triggers
a regeneration.
4.6

Safety

The programmed parameters are stored permanently and remain
unaffected by this.
EN
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