Grunbeck WINNI-mat VGX User manual

Operation Manual
Water Softener
WINNI-mat®VGX
Edition December 2015
Order no. 215 188 040-inter
Test
pending

Water Softener
WINNI-mat®VGX
Order no. 215 188 040-inter Edited by: KONS-pha-rg G:\BA-188040-INTER-VGX.DOC
2
Contents - Summary
A General 5
1 Preface
2 How to use this operation manual
3 General safety information
4 Shipping and storage
5 Disposal of used parts and materials
B Basic Information 9
1 Laws, regulations, standards
2 Water, scale and softening
3 Ion exchange
C Product Description 12
1 Type designation plate
2 Technical specifications
3 Designated application
4 Application limits
5 Scope of delivery
D Installation 19
1 General installation instructions
2 Preliminary work
3 How to connect the system
4 Terminal plan
E Start-up 26
1 How to prepare the brine tank
2 How to start up the system
3 How to set the soft water hardness
F Operation 32
1 Introduction
2 Operation of control system
2.1 Operating panel and display
2.2 How to set the operating parameters
2.3 How to read the operating status
2.4 How to release a manual regeneration
G Troubleshooting 38
H Maintenance and care 41
1 General information
2 Inspection (functional check)
3 Half-yearly maintenance
4 Annual maintenance
5 Operation log

Water Softener
WINNI-mat®VGX
Order no. 215 188 040-inter Edited by: KONS-pha-rg G:\BA-188040-INTER-VGX.DOC 3
Publisher's information
All rights reserved.
©Copyright by Grünbeck Wasseraufbereitung GmbH
Printed in Germany
Effective with the date of edition on the cover sheet.
-We reserve the right to modifications, especially with regard to tech-
nical progress-
Reprints, translations into foreign languages, electronic storage or copy-
ing only with explicit written approval of Grünbeck Wasseraufbereitung
GmbH.
Any type of duplication not authorized by Grünbeck Wasseraufberei-
tung is a copyright violation and subject to legal action.
Responsible for contents:
Grünbeck Wasseraufbereitung GmbH
Josef-Grünbeck-Strasse 1 89420 Hoechstaedt/Germany
Phone [phone] Fax [phone]
www.gruenbeck.de [email protected]
Print: Grünbeck Wasseraufbereitung GmbH
Josef-Grünbeck-Strasse 1, 89420 Hoechstaedt/Germany

Water Softener
WINNI-mat®VGX
Order no. 215 188 040-inter Edited by: KONS-pha-rg G:\BA-188040-INTER-VGX.DOC
4
EC Declaration of conformity
This is to certify that the system designated below meets the safety and health requirements of
the applicable European guidelines in terms of its design, construction and execution.
If the system is modified in a way not approved by us, this certificate is void.
Manufacturer: Grünbeck Wasseraufbereitung GmbH
Josef-Grünbeck-Strasse 1
89420 Hoechstaedt/Germany.
Responsible for documentation: Markus Pöpperl
System designation: WINNI-mat®
System type: VGX
Order number: Refer to type designation plate
Applicable guidelines: EC Low Voltage Guideline (2006/95 EC)
EC Guideline EMC (2004/108/EC))
RoHS (2011/65/EU)
Applied harmonized standards, in
particular: DIN EN 61000-6-2:2006-03, DIN EN 61000-6-3:2011-09
Applied national standards and
technical specifications, in partic-
ular:
DIN 19636-100:2008-02; DIN EN 14743:2011-05
DIN 31000/VDE 1000:2011-05
Place, date and manufacturer sig-
nature: Höchstädt, 14.12.2015 i. V.
M. Pöpperl
Dipl. Ing. (FH)
Function of signatory: Head of Department Product Realisation and Product Launch

Water Softener
WINNI-mat®VGX
Order no. 215 188 040-inter Edited by: KONS-pha-rg G:\BA-188040-INTER-VGX.DOC 5
A General
1 | Preface
Thank you for opting for a Grünbeck product. Backed by decades of
experience in the area of water treatment, we provide solutions for all
kind of processes.
Drinking water (raw water) is classified as food and requires particular
care. Therefore, always ensure the required hygiene in operating and
maintaining systems for drinking water treatment. This also applies to
the treatment of water for industrial use if repercussions for the drink-
ing water (raw water) cannot completely be excluded.
All Grünbeck systems and devices are made of high-quality materials.
This ensures reliable operation over many years, provided you treat
the systems with the required care. This operation manual assists you
with important information. Therefore, read the complete manual be-
fore installing, operating or maintaining your system.
Customer satisfaction is our prime objective and providing customers
with qualified advice is crucial. If you have any questions concerning
this system, possible extensions or general water and waste water
treatment, our technical service staff, as well as the experts at our
headquarters in Hoechstaedt, are available to help you.
Advice and assistance For advice and assistance please contact your local representative
(refer to www.gruenbeck.com) or get in touch with our service centre
which can be reached during office hours:
Tel.: [phone]
Fax: [phone]
Email: [email protected]
We can connect you with the appropriate expert more quickly if you
provide the required system data. In order to have access to this data
at all times, please have the detailed system information handy (refer
to type designation plate in chapter C-1).

Water Softener
WINNI-mat®VGX
Order no. 215 188 040-inter Edited by: KONS-pha-rg G:\BA-188040-INTER-VGX.DOC
6
2 | How to use this operation manual
This operation manual is intended for the operators of our systems. It
is divided into several chapters (a letter is assigned to each of them)
which are listed in the “Table of contents” on page 1 in alphabetical
order. In order to find the specific information you are looking for,
check for the corresponding chapter on page 1.
The headers and page numbers with chapter information make it eas-
ier to find your way around in the manual. In case of larger chapters,
first check out page 1 of said chapter (e. g. H-1) where you will find
more information on the contents of this chapter.
3 | General safety information
3.1 Symbols and notes Important notes in this operation manual are characterised by sym-
bols. Please pay particular attention to these notes in order to ensure
a danger-free, safe and productive system operation.
Danger! Failure to adhere to these notes will cause serious or life-
threatening injury, extreme damage to property or inadmissible con-
tamination of drinking water.
Warning! Failure to adhere to these notes may cause injury, damage
to property or contamination of the drinking water.
Attention! Failure to adhere to these notes may result in damage to
the system or other objects.
Note: This symbol characterises notes and tips to make your work eas-
ier.
Tasks with this symbol may only be performed by Grünbeck's tech-
nical service or by persons expressly authorised by Grünbeck.
Tasks with this symbol may only be performed by qualified electrical
experts according to the VDE guidelines or according to the guide-
lines of a similar local institution.
Tasks with this symbol may only be performed by water companies
or approved installation companies. In Germany, the installation
company must be registered in a water company installation directory
as per §12(2) AVBWasserV (German Ordinance on General Condi-
tions for the Supply of Water).
3.2 Operating
personnel Only persons who have read and understood this operation manual
are permitted to work with the system. The safety guidelines are to
be strictly adhered to.

Water Softener
WINNI-mat®VGX
Order no. 215 188 040-inter Edited by: KONS-pha-rg G:\BA-188040-INTER-VGX.DOC 7
3.3 Designated
application The system may only be used for the purpose outlined in the product
description (chapter C). The guidelines in this operation manual as
well as the applicable local guidelines concerning the drinking water
protection, accident prevention and occupational safety must be ad-
hered to.
In addition, appropriate application also implies that the system may
only be operated when it is in proper working order. Any malfunctions
must be repaired at once.
3.4 Protection from water damage
Warning! In order to properly protect the installation site from water damage:
1. a sufficient floor drain system must be available or
2. a safety device (see chapter CAccessories) must be installed.
Warning! Floor drains that are channeled off to the lifting system do
not function in case of a power failure.
3.5 Indication of
specific dangers Danger due to electricity! Do not touch electrical parts with wet
hands! Disconnect the system from mains before starting work on
electrical parts of the system. Have qualified experts replace dam-
aged cables immediately.
Danger due to mechanical energy! System parts may be subject to
overpressure. Danger of injury and damage to property due to escap-
ing water and unexpected movement of system parts. Check pres-
sure pipes regularly. Depressurise the system before starting repair
or maintenance work on the system.
Hazardous to health due to contaminated drinking water! The sys-
tem may only be installed by a qualified company. The operation
manual must be strictly adhered to! Ensure that there is sufficient
flow. The pertinent guidelines must be followed for starting-up after
long periods of standstill. Inspections and maintenance must be per-
formed at the intervals specified!
Note: By concluding a maintenance contract, you ensure that all of
the required tasks are performed on time. You may perform the inter-
im inspections yourself.

Water Softener
WINNI-mat®VGX
Order no. 215 188 040-inter Edited by: KONS-pha-rg G:\BA-188040-INTER-VGX.DOC
8
4 | Shipping and storage
Attention! The system may be damaged by frost or high tempera-
tures. In order to avoid damage of this kind:
Protect from frost during transportation and storage! Do not install or
store system next to objects which radiate a lot of heat.
5 | Disposal of used parts and materials
Used parts and materials are to be disposed of, or made available for
recycling purposes, according to the applicable local guidelines.
If a material is subject to specific regulations, adhere to the notes in-
dicated on the packing.
If in doubt, contact your local waste disposal authority or the manufac-
turer for more information.

Water Softener
WINNI-mat®VGX
Order no. 215 188 040-inter Edited by: KONS-pha-rg G:\BA-188040-INTER-VGX.DOC 9
B Basic Information
1 | Laws, regulations, standards
In the interest of good health, rules cannot be ignored when it comes
to the processing of drinking water (raw water). This operation manual
takes into consideration the current regulations and stipulates infor-
mation that you will need for the safe operation of your water treat-
ment system.
Among other things, the regulations stipulate that
only approved companies are permitted to make major modifica-
tions to water supply facilities
and that tests, inspections and maintenance on installed devices
are to be performed at regular intervals.
2 | Water, scale and softening
The water works provide us with pure water (raw water) that is suitable
for drinking. However, this water is much more often used for washing
machines, heating systems, water heaters, commercial devices, etc.,
where it can lead to problems if it is "hard".
Hard water is generated if water containing carbon dioxide* flows
through layers of calcium. It dissolves the calcium until the so-called
calcium - carbon dioxide - equilibrium has been reached.
If this equilibrium is unsettled (e.g. by heating CO2escapes) more
calcium (CaCO3) is precipitated (scale).

Water Softener
WINNI-mat®VGX
Order no. 215 188 040-inter Edited by: KONS-pha-rg G:\BA-188040-INTER-VGX.DOC
10
The total hardness of the water is the sum of the concentrations of
calcium ions and magnesium ions.
Note: Calcium ions and magnesium ions exist side by side in nature,
e.g. in the mineral dolomite.
Hardness ranges according to the German Act on Environmental Sus-
tainability of Detergents and Cleaning Agents (WMRG):
Hardness range °dH °f
mmol/l =
mol/m3
1 (soft) < 8.4 < 15.0 < 1.50
2 (medium) 8.4 – 14.0 15.0 – 25.0 1.50 – 2.50
3 (hard) > 14.0 > 25.0 > 2.50
From hardness range medium onwards, it is advisable to soften the
water for usage. Additional measures may be necessary depending on
the original quality of the water and its intended use.
* CO2from the air dissolves in water, causing a low concentration of carbon dioxide.

Water Softener
WINNI-mat®VGX
Order no. 215 188 040-inter Edited by: KONS-pha-rg G:\BA-188040-INTER-VGX.DOC 11
3 | Ion exchange
Resin
Fig. B-1: Initial position
The exchange of calcium and magnesium ions for sodium ions caus-
es the water to become soft.
Principle
The hard raw water flows through an exchanger. This tank is filled with a
resin, to which sodium ions are bonded (see fig. B-1).
Since these bonding positions at the resin prefer calcium and magnesi-
um ions, these ions are retained while the resin discharges sodium ions
into the water (exchange reaction). In this way, all substances causing
hardness remain in the exchanger. Soft water with sodium ions leaves
the exchanger (fig. B-2). This process continues until a major part of the
sodium ions is exhausted.
Hard water
Soft water
Resin
Fig. B-2: Operation
The exchange reaction can be reversed if a large amount of sodium
ions (salt solution = brine) is added (fig. B-3). By their sheer number,
the sodium ions displace the calcium and magnesium ions at the
docking positions of the resin.
This process restores the initial state. The resin is regenerated and is
again ready for softening.
Drinking water (raw water)
As protection against corrosion, we recommend a soft water hardness
of at least 3 °dH (5.3 °f, 0.53 mmol/l). According to the German Drink-
ing Water Ordinance, the limit value for sodium ions (200 mg/l) should
not be exceeded. This hardness is achieved by adding untreated
drinking water (raw water), a process which is known as blending.
Resin
Waste water
Brine solution
Fig. B-3: Regeneration
Note: Many popular mineral waters contain significantly more
sodium ions. Check for yourself by reading the analysis results
on the labels.
Sodium ions Calcium ions Magnesium ions

Water Softener
WINNI-mat®VGX
Order no. 215 188 040-inter Edited by: KONS-pha-rg G:\BA-188040-INTER-VGX.DOC
12
C Product Description
1 | Type designation plate
The type designation plate is located at the operator panel of the sof-
tener. In order to speed up the processing of your inquiries or orders,
please specify the data shown on the type designation plate when
contacting Grünbeck. Please copy the indicated information to the
table below in order to have it readily available whenever necessary.
Water softener WINNI-mat®VGX
VGX Serial no.: / 
Order no.: 
2 | Technical specification
The WINNI-mat®VGX softener is a single system with built-in bypass
(bypass pipe in connection block) for the continuous supply of raw water
during the regeneration. The system is equipped with a central control
valve and is volume-controlled. The regeneration is released when the
pre-set water volume in the exchanger has been softened. If the water
volume between two regenerations is not consumed within 4 days after
the last regeneration, the system starts a forced regeneration (required
as per DIN 19636). The system regenerates using inlet water.
All system data are summarised in tables C-1 and C-2. The information
indicated applies to standard softeners. Possible deviations in case of
special versions are listed separately, if applicable.
Warning! Extended periods of standstill may cause bacterial growth
in the drinking water (raw water). The automatic regeneration coun-
teracts this effect. Therefore, do not disconnect the system from the
water and power supply when you are absent for longer periods of
time.
Attention! Electrically operated valves. In case of power failure during
the regeneration, water may flow into the drain or brine tank. In case of
power failure, check the system and shut-off the water supply, if neces-
sary.

Water Softener
WINNI-mat®VGX
Order no. 215 188 040-inter Edited by: KONS-pha-rg G:\BA-188040-INTER-VGX.DOC 13
Table C-1: Technical specifications Water Softener WINNI-mat®VGX
9 14 19 14 H
Connection data
Connection diameter DN 25
(
1" AG
)
Drain connection min. DN 50
Power supply [V]/[Hz] 230/50-60
(
s
y
stem operation with protective low volta
g
e 24/50-60
)
Connected load
Operation = max. / standb
y
[VA] 17 / 13
Protection/protection class IP 54/I
Performance data
Nominal pressure PN 10
Operatin
g
pressure min/max.
(
recommended
)
[bar] 2.0/8.0
(
4.0
)
Nominal flow at 0.8 bar pressure loss (raw
water 20 °dH (35.6 °f, 3.56 mmol/l) and soft
water hardness 8 °dH
(
14,2 °f, 1,42 mmol/l
)
)
[m³/h] 1.7 2.1 2.1 -
Nominal flow at 0 °dH
(
0 °f, 0 mmol/l
)
[m³/h] 1.3 1.4 1.4 0.5
Nominal flow acc. to DIN EN 14743
(
pressure loss 1 bar ≙KVvalue
)
[m³/h] 1.6 1.7 1.7 -
Nominal capacit
y
[mol] 1.6 2.4 3.2 2.4
Capacit
y
per k
g
of re
g
eneration salt [mol/k
g
] 4.5 4.5 4.3 2.9
Duration of re
g
eneration [min] 50 60 70 68
Dimensions and wei
g
hts 1
)
A
S
y
stem width [mm] 330
B S
y
stem hei
g
ht [mm] 640
C S
y
stem depth [mm] 530
D Hei
g
ht of safet
y
overflow brine tank [mm] 395
E Connection hei
g
ht of control valve [mm] 507
F Installation length without
screw connection [mm] 190 -
G Installation length
with screw connection [mm] 271 -
Operatin
g
wei
g
ht, approx. [k
g
] 60 73 75 73
Wei
g
ht empt
y
, approx. [k
g
] 25 28 30 28
Fillin
g
volumes and consumption data
Resin fillin
g
volume [l] 4 6 7.5 6
Salt consumption per regeneration approx.
*[g] 350 530 750 850
Re
g
eneration salt suppl
y
max. [k
g
]38
Total waste water volume per re
g
eneration, approx. [l] 30 40 50 53
General information
Suitable for homes of … families
(
up to … persons
)
2
)
1-2
(
5
)
3-5
(
12
)
6-8
(
20
)
-
DVGW re
g
istration number NW-9151BP5635
SVGW certificate number test pendin
g
Max. water/ambient temperature3
)
[°C] 30/40
Order no. 188 100 188 200 188 300 188 250
*The waste water volume and salt consumption refer
to an inlet pressure of 3 bar. The indicated values
change at different inlet pressures and only serve as
a means for a rough analysis.
1) All indications are approximate.
2) Recommendation for installation in Switzerland: VGX
9 for one-family homes, VGX 14 for 2-family homes,
VGX 19 for 3-family homes
3) Refer to installation requirements!
Fig. C-1: Dimensional drawing WINNI-mat®VGX

Water Softener
WINNI-mat®VGX
Order no. 215 188 040-inter Edited by: KONS-pha-rg G:\BA-188040-INTER-VGX.DOC
14
3 | Designated application
Water softeners of the series WINNI-mat®VGX are designed for the sof-
tening and partial softening of cold drinking and process water. In case of
single systems, only raw water is available during the regeneration
phase.
Note: In case of unfavourable flow conditions / installation situations,
the water supply by means of the bypass may result in flow noises.
The water to be softened has to be free of iron and manganese (less
than 0.2 mg iron resp. 0.05 mg manganese per litre). Based on VDI
6023. If the softened water is intended for human consumption as per the
German Drinking Water Ordinance, the ambient temperature must not
exceed 25 °C. In case of solely technical applications, the ambient tem-
perature must not exceed 40 °C. The systems are suitable for (partial)
softening of drinking and process water.
Note: For the softening to < 1°dH (1.78 °f, 0.178 mmol/l), only VGX 14-
H is suitable.
The stipulations of the Drinking Water Act are compulsory for the sof-
tening of drinking water (raw water); 200 mg/l of sodium ions (refer to
chapter E, pos. 3) not to be exceeded. This requires a blending valve
for the addition of inlet water.
The system is adjusted to the soft water requirements to be expected at
the installation site, it is not suitable for major deviations.
The system may only be operated if all components are installed
properly. Safety devices must NEVER be removed, bridged or other-
wise tampered with.
Appropriate application of the system also implies that the information
contained in this operating manual and all safety guidelines applying at
the installation site be observed. Furthermore, the maintenance and
inspection intervals have to be observed.

Water Softener
WINNI-mat®VGX
Order no. 215 188 040-inter Edited by: KONS-pha-rg G:\BA-188040-INTER-VGX.DOC 15
4 | Application limits
According to DIN 1988-200, the following application limits are valid:
Range of application Max. nominal capacity acc. to
DIN 1988 -200 System
One- and two-family homes
(up to 5 persons) 1.6 mol (9.0 °dH x m³, 16 °f x m³) VGX 9
Three- to five-family homes
(up to 12 persons) 2.4 mol (13.4 °dH x m³, 24 °f x m³) VGX 14
Six- to eight-family homes
(up to 20 persons) 3.6 mol (20.2 °dH x m³, 36 °f x m³) VGX 19
5 | Scope of delivery
5.1 Standard equipment
Water softener, completely assembled, ready for connection for
DN 25 (1“)
Operation manual
Operating card
Water test kit “Total hardness“
5.2 Accessories
Note: It is possible to retrofit existing water softeners with accesso-
ries. Please contact your local Grünbeck representative or Grünbeck’s
headquarters in Hoechstaedt for details.
EXADOS®dosing computer EK 6 – GSX/VGX
EXADOS®dosing computer ES 6 – GSX/VGX 115 430
115 440
Electronically-controlled dosing system for corrosion
protection in combination with the WINNI-mat®VGX.
The system is triggered by the serial interface of the
WINNI-mat®VGX EXAcount without the necessity of an
additional turbine water meter.

Water Softener
WINNI-mat®VGX
Order no. 215 188 040-inter Edited by: KONS-pha-rg G:\BA-188040-INTER-VGX.DOC
16
GENO-STOP®G 1” 126 875
GENO-STOP®for optimum protection from water dam-
age.
The new safety device GENO-STOP®provides reliable
and comprehensive protection from water damage. The
GENO-STOP®can be equipped with up to 2 wired water
sensors and 5 wireless water sensors.
For additional models, please inquire.
Delivery pump for regeneration water VGX/GSX 188 800
Delivery pump resistant against salt water for draining the
regeneration water in case of drain levels up to 2.5 m. The
pump is activated via the controller.
Drain connection DN 50 according to EN 1717 for
small water softeners 187 840
Connection accessories for DIN-conform waste water
connection DN 50, consisting of siphon, connection nipple
for drain resp. overflow hose and fastening material.
M-Bus measuring transducer D-DAM, complete
To transmit the flow rate and the meter reading as well
as statistical values of the water meter by means of M-
Bus (IEC 870). Furthermore, flow-controlled pulse out-
put, analogue output and relay contact to Grünbeck con-
troller. Dimensions 160 x 240 x 160 mm
115 850
Extension kit for connection hose 187 860
Extension kit for connection hose to extend the length of
the hose to 1.6 m, consisting of:
2 coupling pieces
2 flexible connection hoses

Water Softener
WINNI-mat®VGX
Order no. 215 188 040-inter Edited by: KONS-pha-rg G:\BA-188040-INTER-VGX.DOC 17
Connection angle 90°- 1“ (1 pair) 187 865
In case of cramped installation situations, the connec-
tion hoses can be laid much closer alongside water
softener.
Supplementary blending valve 187 870
To generate a second soft water hardness, can
directly be connected to the connection block.
Supplementary soft water outlet 187 875
Installation in soft water outlet between water sof-
tener and connection block, incl. sampling valve
and non-return valve.
Double screw connection G 1 ¼“ 151 072
For direct connection of drinking water filter (1“)
and water softener.
5.3 Consumables Please use only original consumables in order to ensure the reliable
operation of the system.
Regeneration salt (25 kg) acc. to EN 973
type A
Water test kit "Total Hardness °dH“
1 piece
127 001
170 145
Water test kit "Total Hardness °f“ 1 piece 170 182
5.4 Spare parts
You may order spare parts and consumables from your local
Grünbeck representative (refer to www.gruenbeck.de).
Note: For detailed specifications of the wearing parts refer to
chapter C-5.5.

Water Softener
WINNI-mat®VGX
Order no. 215 188 040-inter Edited by: KONS-pha-rg G:\BA-188040-INTER-VGX.DOC
18
5.4 Wearing parts
Seals are subject to a certain wear and tear. Wearing parts are listed
below.
Note: Although these are wearing parts, we grant a limited warranty
period of 6 months. The same applies for electrical components.
a) Seals, disc pairs, injector,
actuators
b) Carbon electrodes of the
disinfection unit
Fig. C-2: Control valve Fig. C-3: Brine valve
c) Maintenance kit VGX 187 804
consisting of:
Maintenance instructions
Profile seals/lip seals/O-rings
Special grease for discs

Water Softener
WINNI-mat®VGX
Order no. 215 188 040-inter Edited by: KONS-pha-rg G:\BA-188040-INTER-VGX.DOC 19
D Installation
1 | General installation instructions
The installation site must provide adequate space. A foundation of a
sufficient size and adequate carrying capacity must be provided. The
required connections must be provided for, before the system is in-
stalled. Please refer to table C-1 for dimensions and connection data.
1
Drinking water filter
(e. g. BOXER®KD incl. pressure reducer)
5
Drain connection DN 50 acc. to DIN EN 1717
for small-scale water softeners
2
GENO-STOP®
6
Control valve WINNI-mat®VGX
3
Water withdrawal point
6a
Soft water connection
4
Dosing computer EXADOS®
6b
Raw water connection
Fig. D-1: Installation example WINNI-mat®VGX

Water Softener
WINNI-mat®VGX
Order no. 215 188 040-inter Edited by: KONS-pha-rg G:\BA-188040-INTER-VGX.DOC
20
Fig. D-1 (a): Connections and control valve WINNI-mat®VGX
Note: Observe the operation manuals that have been supplied with
the accessories (see chapter C, 5.1) for your system (if applicable).
1.1 Water
installation You MUST observe the binding rules listed below when installing the
water softener WINNI-mat®VGX. Further recommendations facilitate
the work with the system. These installation instructions are illustrated
in fig. D-1.
Binding rules
The installation of a water softener represents a major interference of
the drinking water system. Therefore, only authorised experts may
install such systems.