Durr Dental Hygopure 90 User manual

EN
Installation and Operating instructions
2016/11SE
6046100125L41
*6046100125L41*
Hygopure 90

Installation and operating instructions for the Hygopure 90 water treatment system Page 1
Last updated: November 2016
TABLE OF CONTENTS
1Introduction .................................................................................................................. 2
2Important information prior to installation ..................................................................... 3
2.1 Installation requirements ....................................................................................... 3
2.2 Inspection of the delivery ...................................................................................... 3
2.3 Recommended tools for the installation ................................................................ 4
2.4 Location of the main components ......................................................................... 5
2.5 Serial number ........................................................................................................ 6
2.6 Structure of the Hygopure 90 water treatment system .......................................... 6
3Installation and commissioning the water treatment system ........................................ 7
3.1 Installing the water treatment system .................................................................... 7
3.1.1 Installing the water connection valve .............................................................. 7
3.1.2 Installing the waste water valve ...................................................................... 9
3.1.3 Installing the water tap .................................................................................... 9
3.1.4 Screwing in the steriliser connector .............................................................. 11
3.1.5 Connecting the pressure hoses .................................................................... 11
3.2 Commissioning the water treatment system ....................................................... 12
3.3 Technical information about the eco pump and the degree of efficiency ............ 13
4Care and maintenance of the water treatment system ............................................... 14
4.1 Cleaning and care from outside .......................................................................... 14
4.2 Replacement intervals for filter cartridges and membrane .................................. 14
4.3 Servicing the storage tank ................................................................................... 15
4.4 Important information pertaining to disinfection ................................................... 16
4.5 Important safety information following system standstill ..................................... 16
4.6 Replacing the filter cartridges .............................................................................. 17
4.7 Replacing the membrane .................................................................................... 19
5System specifications ................................................................................................. 21
6Problem-solving (tips and tricks) ................................................................................ 23
© VEWAMED GmbH & Co. KG 2020:
All rights reserved. Any reproduction, adaptation or translation - even in part - requires the express written
permission of VEWAMED

Installation and operating instructions for the Hygopure 90 water treatment system Page 2
Last updated: November 2016
1 Introduction
Congratulations on the purchase of your Hygopure 90 water treatment system. You are the proud
owner of a high-quality and reliable water treatment system for the production of demineralised
water.
This water treatment system was subject to an intensive quality test. This test checked the system
for its function and for leaks.
Please read the installation and operating instructions carefully before starting with the
installation. Retain this manual for later consultation.
The Hygopure 90 water treatment system acts reliably and in an environmentally-friendly fashion
to remove any bacteria, chlorine, hardness components, nitrates, pesticides, heavy metals,
sediment particles, silicates, viruses etc. and provides effective protection for your steriliser. After
pre-filtering, the tap water is cleaned via return osmosis. In contrast to all other methods of water
filtration, this filter technology removes almost all dissolved and undissolved molecule substances
from the tap water. This is based on a purely mechanical procedure without the release of any
chemicals or substitute materials. After the reverse osmosis procedure, the permeate is
desalinated using an ion exchanger. This produces high-quality demineralised water.
An amazing effect of the reverse osmosis technology is that the membrane predominantly lets
just water molecules pass through; the contaminants which it holds back are washes away from a
part of the water. The deflection of the water prevents contaminants either from entering the
cleaned water or from collecting within the system as with other filter methods. This also prevents
blockage of the membrane. In consequence, reverse osmosis membranes also have a very large
service life given constant output and minimum maintenance over many years.
The Hygopure 90 water treatment system is fitted with an eco module (water-saving technology).
This module consists of a hydraulic pump (permeate pump) and a hydraulic valve (automatic
shut-off valve). The eco module increases system efficiency by up to 70% and maintains this
constant whilst the storage tank is being filled. Operation of the eco module does not require
electricity as the water pressure of the waste water provides the requisite energy. The production
of pure water is indicated by a periodic "clicking" of the eco pump and a quiet whistling of the
hydraulic valve. The intervals and volume of the noise depends on the tap water pressure.

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2 Important information prior to installation
2.1 Installation requirements
The technical operating conditions of this water treatment system:
Water pressure:
from 2.4 to 7.0 bar
Water temperature:
from 4.0 °C to 38.0 °C
Hardness range:
All hardness ranges from soft (up to 8.4 °dH) to hard (> 14
°dH)
In general, tap water satisfies these requirements. Should you be uncertain, please makes
inquiries with your local provider.
NOTICE:
(1) The installation and maintenance of this water treatment system may only be
performed by trained and authorised persons.
(2) Do not connect the water treatment system to a hot water connection or behind a
pressureless boiler.
(3) Do not subject the water treatment system to temperatures below 0°C.
(4) If the water pressure exceeds 7.0 bar, a pressure reducer must be installed upstream.
(5) Use only microbiologically faultless water for the operation of the system.
(6) Safety reasons mean that we recommend either installing an aqua-stop valve or only
operating the water treatment system under supervision and turning off the water
supply outside the operating time. This avoids potential water damage.
(7) Comply with all general guidelines, local installations and hygiene regulations.
(8) Do not use any aggressive cleaning agents or disinfectants to clean the water
treatment system (inc. hose connections and hoses) as these could cause damage to
the system and result in water damage. Use only the VEWAMED disinfectant for
exterior and internal disinfection. Comply with the specifications of chapter 4 "Care
and maintenance of the water treatment system“.
2.2 Inspection of the delivery
The scope of delivery includes the components depicted on page 3. Should a components suffer
damage during transport, do not start with the installation. Instead, contact the dealer so that he
can replace the system.

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System components included in the scope of delivery:
Water treatment system with storage tank
The accessories kit contains:
Water connection valve Filter key Steriliser connector
Water tap Waste water valve Hose configuration
and
 1 pressure hose, black (2.0 m)
 2 pressure hoses, white (each 1.5 m)
 3 white plug angle connectors for optimal hose installation
 15 securing rings
 Replacement parts for hose connectors
 2 cable ties
Optional accessories (e.g. conductance meter, aqua-stop valve) are available from your dealer.
2.3 Recommended tools for the installation
We recommend the following tools for the installation:
 (battery) drill
 Open-ended wrench 14 mm or an adjustable spanner
 Screwdriver
 Hex driver with 2.5 mm tip
 Hose cutter (or scissors or a sharp knife)

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2.4 Location of the main components
Before starting with the installation of the Hygopure 90 water treatment system, you must decide
upon the optimal placing of the three main components filter system (filter group) storage tank
and water tap. Take into account the suitable connection possibilities for the inflow water and the
waste water.
Location of the filter group
The Hygopure 90 water treatment system is ideal for undertable installation, but can also be set
up directly on the work surface next to the steriliser.
NOTICE:
The Hygopure 90 water treatment system must be placed in an upright position and may
not be placed on its rear, otherwise it is impossible to guarantee the functionality of the
eco module.
Ensure that you have easy access to the filter group when you later need to change the filter
cartridge. When changing the filter cartridge, we recommend that you place the filter group
carefully on a towel.
Placing the storage tank
The storage tank should be maintained in an upright position. It is important that the storage tank
remains easily-accessible.
The white pressure hose included in the scope of delivery permits the installation of the storage
tank with a clearance of up to 1.5 metres from the filter group. In some cases, it is necessary to
place the storage tank further away. In this case, please contact your dealer.
Placing the water tap
A surface on the sink or work surface with a 5 cm diameter is required for the installation of the
water tap. Both practical and aesthetic considerations are important in locating the water tap.
Detailed information pertaining to the installation is provided in chapter 3.1.3 of this manual.
The white pressure hoses included in the scope of delivery permit the installation of the water tap
with a clearance of up to 3.5 metres from the storage tank. Should you require longer pressure
hoses, please consult your dealer. To prevent an overly-large pressure fall on the water tap
resulting from overly-long hose lines, the entire hose length "storage tank to the water tap" should
not exceed 8 metres.

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2.5 Serial number
Before starting with the installation, enter the serial number of the water treatment system here.
The serial number is located on the type plate on the rear of the filter group.
Serial number: _____________________________
Please have the serial number to hand for any questions or for service needs.
2.6 Structure of the Hygopure 90 water treatment system
The following figures show the structure of the water treatment system.
Figure: Hygopure 90 water treatment system - filter group and storage tank
1. Filter group (consisting of a system head and filter housing)
2. Activated carbon block filter (5 microns) in the right-hand filter housing (1st filter stage)
3. Sediment filter (1 micron) in the centre filter housing (2nd filter stage)
4. Ion exchanger in the left filter housing (4th filter stage)
5. Dust cover
6. Storage tank
7. Storage tank valve
Important note:
The mounting eyes for wall mounting are located on the rear of the filter group next to the
connection fitting for the blue cold water hose, the black waste water hose and the white
storage tank hose.
1
6
2
3
4
7
5

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Figure: Hygopure 90 (system head)
8. Membrane housing with membrane (3rd filter stage)
9. eco pump (permeate pump)
10. Automatic deactivation valve
11. Membrane service valve
12. Reducing valve
13. System console (aluminium filter acceptance)
14. Filter housing cover
3 Installation and commissioning the water treatment system
3.1 Installing the water treatment system
The main section of the installation now begins. Following all the next steps in a sequential
fashion.
3.1.1 Installing the water connection valve
NOTICE:
We recommend that you secure every water treatment unit with an aqua-stop valve on
safety grounds. Alternatively, either only operate the water treatment system under
supervision and turn off the water supply outside the operating time using a central water
supply switch (e.g. ball cock). This avoids potential water damage.
The standard scope of delivery contains a water connection valve (consisting of a tap connection
with a 3/4" thread, a nonreturn valve and a water shut-off valve). The scope of delivery also
contains a tap connection with 1/2". These tap connections fit all outlet valves (cold water taps)
with 3/4" or 1/2" thread. You can plug the grey plug angle connection (included in the scope of
delivery) into the tap connection to ensure optimal hose installation.
The nonreturn valve prevents flowback into the water supply. The nonreturn valve and the water
shut-off valve are already integrated in the blue water inflow hose and are pre-installed.
8
9
10
12
13
14
11

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Holding
element
Figure: tap connection with an integrated nonreturn valve
Now screw in the fitting water connection valve (tap connection) to the tap hand tight. The water
connection valve (tap connection) can be screwed in somewhat tighter if necessary. Keep the tap
closed.
Technical tips regarding the hose connections:
The Hygopure 90 water treatment system only uses high-quality John Guest hose connections
called "Quick Connect Fittings". When using John Guest connections, you need only connect the
pressure hose to the corresponding fitting and you are finished. This enables quick and simple
installation. The following figures show the function of the John Guest hose connections:
Connecting the hose: slide the hose into the hose connection to its fullest extent until it is tight.
The holding element fixes the hose in the connector. The o-ring creates a permanently leak-free
connection. Pull the connection lightly to check it.
Figure: Connecting the hose
Remove the hose: Check that the system is de-pressurised. Push the holding element into the
hose connection and hold using your fingers. You can now remove the inserted hose with your
other hand.
Figure: Removing the hose

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3.1.2 Installing the waste water valve
Fit the waste water valve to the waste water siphon to enable removal of the waste water. To do
so, fix the waste water valve to a suitable position on the waste water siphon using the rubber
collar and the pipe clamps. You may need to shorten the waste water connection on the waste
water siphon with a saw or a sharp knife so that the rubber collar lies closely on the waste water
connection of the waste water siphon. Position the waste water valve in such a way that the
connection of the water treatment system for the waste water hose points upwards and at an
angle. Screw the hose clamps tight using a screwdriver or an adjustable spanner.
Figure: Waste water valve
1. Water treatment system connection fitting for the waste water hose
2. Connection for the steriliser waste water hose
3. Rubber collar
4. Hose clamps
5. Waste water connection from the waste water siphon
3.1.3 Installing the water tap
A surface on the sink or work surface with a 5 cm diameter is required for the installation of the
water tap (the white protective plate of the water tap has a diameter of 4.5 cm). Should you not
have this amount of space available, you can leave out the protective plate. In this case, you will
require an installation surface with a diameter of 3.3 cm (this corresponds with the trunk diameter
of the water tap). Practical considerations are central in locating the water tap, aesthetic reasons
also exist.
Ensure that the position of the water tap permits simple installation from below. The water tap
should be located far enough from the sink fittings to enable both taps to be operated easily and
to prevent interference.
Some sinks have wooden struts or metal clips on the underside. Avoid these locations and look
for another position for the water tap.
The drillhole with a diameter of 12 mm must be performed with considerable care. Work
with care and comply with all the general protective regulations.
4
2
1
3
5

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Installing the water tap
Fit the water tap as follows (see following figure):
1. Should the selected position on the work surface or the sink permit the use of the white
protective plate, slide the protective plate and directly under the trunk of the water tap followed
by the rubber seal. In this case, the small black rubber seal is not required for installation.
Should the available space not permit use of the protective plate, slide the slide the small
black rubber seal directly under the trunk of the water tap.
2. Push the water tap through the drillhole. Slide on the thick black plastic flat washer from the
underside of the work surface or sink.
Tip:
The strength of some work surfaces may necessitate omission of the black plastic flat washer to
enable the water tap to be screwed down.
Figure: Installing the water tap
3. Now slide on the counter-ring and screw on the locknut.
4. Now align the water tap by turning the trunk into the desired position. Then tighten the locknut
or the fixing nut using a open-ended wrench (14 mm) or an adjustable spanner. Hold the trunk
in the desired position. Ensure that the white paint does not suffer damage.
5. Screw on the hose adapter. Do not over-tighten.
Water tap trunk
Tap upper part, pivotable
No rubber seal
Protective plate
Large rubber seal
Plastic flat washer
Counter-ring
Locknut
Hose adapter

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The function of the water tap
The water tap has two operating positions:
1. Pulling the lever upwards effects a continuous function. This then latches. This position is
recommended if you need to fill a larger vessel or empty the storage tank completely.
2. Should you only wish to remove a small amount, depress the lever. The water only flows
when the lever is depressed.
3.1.4 Screwing in the steriliser connector
The water connection with a 3/8" internal thread is located on the rear of the Hygoclave 90 Dürr
Dental steriliser. Screw in the steriliser connector hand-tight. The steriliser connector can be
screwed in somewhat tighter with an adjustable spanner.
3.1.5 Connecting the pressure hoses
Please use the following tips to connect the pressure hoses:
Tips for connecting the pressure hoses:
(1.) NOTICE: Do not bend the hose
The pressure hoses must not be kinked during installation and connection.
(2.) NOTICE: Do not damage
Install the pressure hoses in such a way that they cannot be damaged by other objects or a
cupboard door. As such, we advise that you protect the hoses with a flexible empty conduit.
(3.) Hose length:
Cut the hoses with a hose cutter, scissors or a sharp knife. Ensure a clean cut at right-angles.
The hoses may not be too short, so that the filter group can be removed simply and easily for the
purposes of changing the membrane or filter cartridge. Cutting the hoses too short means that
you will need to disconnect the hoses from the hose connections when changing the filter. As
such, we recommend that you do not shorten the hoses!
The connection fittings for the blue cold water hose, the black waste water hose and the
white storage tank hose are located on the rear of the filter group.
Install the hoses included in the scope of delivery as follows:
1. First remove the plastic protective sleeves from the respective hose connections.
You can use the plug angle connector (included in the scope of delivery) as required to
ensure optimal hose installation.
2. Insert the black hose on the quick-connect fitting of the waste water valve and the other end
in the grey hose connection (black waste water hose) on the rear-side of the filter group.
3. The blue hose serves as a water line and is pre-installed. Now insert this in the tap
connection.

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4. Connect a white hose (1.5 m in length) in the hose connection of the left-hand filter housing
(4th filter stage and the other end in the T-connector of the storage tank. Insert the other
white hose (length: 1.5 m) in the T-connector of the storage tank and insert the other end in
the T-connector of the hose "steriliser hose - removal hose“ hose configuration.
5. The white hose of the hose configuration with integrated stop valve (steriliser shut-off
valve) must be connected in the steriliser connector on the rear-side of the steriliser. You can
interrupt the water connection to the steriliser using the shut-off valve in the steriliser hose.
This is required with a filter change, system disinfection or maintenance of the steriliser.
6. Insert the other white hose of the hose configuration (length: 2.0 m) in the water tap hose
adapter. You can perform pressure relief via the water tap when changing the filter or
membrane.
7. Now you can fix the hoses with cable ties. This bundles the pressure hoses tidily. Do not pull
the cable ties too tight, so that the hoses do not suffer damage and you can still slide
the cable ties a little if required. Ensure that the pressure hoses are not kinked.
8. Now you can fix the pressure hoses with the red securing rings. This prevents unintedned
loosening of the hoses. This makes sense for the water line hose above all. Press the
securing ring between the clamping sleeve and the fitting until the securing ring latches. You
may need to pull back the hose carefully to do this.
3.2 Commissioning the water treatment system
Commission the water treatment system with the following simple steps:
1. Ensure that the steriliser shut-off valve, the storage tank valve and the water shut-off valve
are still closed.
open closed
Figure: Function of the storage tank valve, the steriliser shut-off valve,
Water shut-off valve and membrane service valve
2. Now open the tap slowly and then then water shut-off valve. Check for leaks in the hose
connections. The system will fill with water and production begins.
3. Open the water tap. The steriliser shut-off valve must be closed. Demineralised water will drip
or flow out of the water tap for c. five minutes. The flow speed is the production rate with
which the water treatment system produces demineralised water. Allow the system to produce
for c. 1 hour. This ensures that all the filter cartridges and the membrane are subject to
sufficient rinsing. Whilst this is happening, check all the hose connections for leaks.
4. Now close the water tap and open the storage tank valve. The storage tank now begins to fill
with demineralised water. The time required to fill the storage tank depends on the water
temperature and above all the water pressure. A storage tank with a gross volume of 12 litres
requires between 1 and 3 hours to fill. Check the complete system for leaks. Once you no
longer hear the click of the eco pump, the storage tank is full.

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5. Open the steriliser shut-off valve. The system is now ready for operation.
Check the water treatment system every day in the first week after installation for any
leaks. Thereafter make the checks on a weekly basis.
Congratulations,
You have now successfully installed your Hygopure 90 water treatment system.
Please comply with the further specifications in this manual, above all Chapter 4.5
"Important safety information following system standstill".
3.3 Technical information about the eco pump and the degree of efficiency
(1) The Hygopure 90 water treatment system is fitted with an eco module (water-saving
technology). This module consists of a hydraulic pump (permeate pump) and a hydraulic valve.
The eco module increases system efficiency by up to 70% and maintains this constant whilst the
storage tank is being filled. Operation of the eco module does not require electricity as the water
pressure of the waste water provides the requisite energy. The production of pure water is
indicated by a periodic "clicking" of the eco pump and a quiet whistling of the hydraulic shut-off
valve. The intervals and volume of the noise depends on the tap water pressure.
(2.) Given high water pressure and depending on the hose installation, it is possible that
the higher energy of the waste water causes the black waste water hose to strike against
another object (e.g. the waste water pipe). If you think that the eco pump is "clicking" too
loudly, the cause is in all probability to be found with the waste water hose. In this case, check the
hose installation and if necessary, adapt it to the cable ties or secure the waste water hose with
an additional cable tie. This prevents the blows (or the disturbing noises) from the waste water
hose.
(3.) The ratio between the raw water produced and the amount of waste water is referred
to as the degree of efficiency. The degree of effectiveness of the Hygopure 90 water treatment
system is set to an optimal ratio. Depending on the water pressure and temperature, it lies at
between 1.3 and 1.4. This guarantees optimal productivity, a long membrane service life and a
high purity level of the permeate.

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4 Care and maintenance of the water treatment system
4.1 Cleaning and care from outside
If necessary, the filter group, the storage container and the pressure hoses can wiped down with
a soft, lint-free cloth and warm soapy water. Do not use any scouring agents, sharp cleaning
tools, disinfectant solutions or aggressive cleaning agents to clean the water treatment
system (esp. hose connections) as these could cause damage to the system and result in
water damage.
The exterior disinfection can be performed using the VEWAMED disinfectant (SANOSIL
solution S003). Die SANOSlL Lösung S003 is a 1.5% hydrogen peroxide silver solution which
poses no danger to human health and the environment. It has been tested in accordance with
DGHM (Deutsche Gesellschaft für Hygiene und Mikrobiologie - The German Association for
Hygiene and Microbiology) requirements. This disinfectant is odour-free and can be stored for c. 2
years without loss of effectiveness. Keep the disinfectant shut and at a temperature under 25°C.
Keep out of the reach of children!
4.2 Replacement intervals for filter cartridges and membrane
The pre-filter cartridges activated carbon block filter (filter stage 1) and sediment filter
(filter-stage 2) should be changed when the ion exchanger is exhausted or after a year at the
latest.
The service life of the ion exchanger cartridges (filter stage 4) depends above all on the daily
requirements for demineralised water. For example, with tap water with 14° dH; a permeate of 40
µS; a daily requirement of 5 L demineralised water and a threshold valve of 15 μS for the
demineralised water, this produces a ion exchanger service life of 260 days (excerpt from the
service life table). The ion exchanger cartridge should be also replaced after a year at the latest.
The Hygopure 90 water treatment system cartridge set (consisting of a pre-filter and ion
exchanger) is available to this end.
NOTICE:
Hygiene grounds require that you ensure extreme cleanliness when replacing the filter
cartridge. Do not touch the filter cartridges directly with your hands; use the packaging, a
clean cloth or new disposable gloves to handle the filter cartridge.
Experience shows that the membrane (filter stage 3) must be replaced every 3 - 5 years. Hard
tap water can require replacement after 2 years.
A high membrane filtration capacity (i.e. retention quota of the membrane) means a longer
service life for the ion exchanger. If the conductance of the permeate doubles from e.g. 40
µS/cm to 80 µS/cm the service life of the ion exchanger will halve.
The time depends primarily on the cleaning performance of the membrane. If this falls under 80%,
change is required. As such, we recommend that you not only check the conductance of the
demineralised water at regular intervals, but also determine the conductance of the permeate (or
the retention quota of the membrane). The retention quota of the membrane is calculated as
follows:
EC value raw water - EC value permeate
EC value raw water
x 100%
Retention quota in % =

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We recommend that you check the retention quota at least once a year (e.g. when changing the
cartridge). You can ascertain the retention quota via the membrane service valve using a
hand-held conductance meter. Proceed as follows:
1. Close the storage tank valve.
2. Use a hex driver (tip 2.5 mm) to unscrew the two fixing screws on the dust cover.
3. Open the water tap and allow the system to produce for min. 10 minutes. Then close the
water tap.
4. Now open the membrane service valve and catch the permeate in a clean container (glass
beaker). Then shut the membrane service valve.
5. Measure the conductance of the permeate using a hand-held conductance meter.
6. Fill another container with tap water and measure the conductance of the raw water.
7. Return the dust cover to the system console and screw it tight. Then re-open the storage tank
valve.
4.3 Servicing the storage tank
We recommend that you subject the air pressure of the empty storage container to regular checks
(min. every 2 years), ideally upon every filter change. Only a correctly set pre-pressure
guarantees the complete functionality of water treatment system with reverse osmosis.
Tips:
(1.) Air pressure in the storage tank
The empty storage container stands under an over-pressure of 0.5 to 0.6 bar. This air pressure
can be measured on the air pressure valve of the storage container (this is protected by a
protective cap) and changed if necessary. The air pressure of the storage tank was set carefully
before delivery.
(2.) Measuring and setting the air pressure
The air pressure valve of the storage tank functions like the valve on a car or a bicycle tyre. The
air pressure is easy to measure using an air pressure monitor.
Proceed as follows to check the air pressure of the storage tank:
1. Close the valve of the water tap then open the water tap and empy the storage tank.
2. Then close the water tap and the storage tank valve. Now remove the short hose with the T
connector from the storage tank valve.
3. Hold the storage tank at a slight angle / horizontally over the sink and open the storage tank
valve. This enables any residual water to leave the storage tank. Then close the storage tank
valve again.
4. Now screw on the protective cap of the air pressure valve. This is located on the underside of
the storage tank.

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5. Measure the air pressure with a pressure meter and increase the pressure as required (e.g.
with a bicycle pump). The empty storage tank must have a pre-pressure of between 0.5 bar (7
psi) and 0.6 bar (8.5 psi). Screw the protective cap onto the air pressure valve.
6. Reconnect the short hose with the T connector to the storage tank valve and open the water
connection valve and the storage tank valve.
4.4 Important information pertaining to disinfection
The water treatment system must be disinfected following longer down-time and at least
once a year. Ideally, you should combine disinfection with the annual filter cartridge change. To
this end, please comply with the note in chapter 4.5 "Important safety information following
system standstill" and chapter 4.6 "Replacing the pre-filter cartridges".
The aim of disinfection is to prevent microbial contamination of the system. All system
components subject to water flow are much less sensitive to microbiological contamination than
locations with standing water i.e. in a storage tank. Microbes could develop here, especially given
system standstill.
The disinfection of the water treatment system should be performed by a service technician.
4.5 Important safety information following system standstill
Safety reasons mean that we recommend either installing an aqua-stop valve or only
operating the water treatment system under supervision and turning off the water supply
outside the operating time. This avoids the danger of water damage.
Given downtime of the water treatment system of a number of days (e.g. a over the
weekend) it is sufficient if you close the the water connection and the storage tank valve.
Given downtime of the water treatment system of up to three weeks (e.g. a two-week
holiday) considerations of safety require that you close the the water connection valve and
empty the storage tank. Then close the storage tank valve and the steriliser shut-off valve.
After returning, allow the water treatment system to produce for c. 30 minutes whilst keeping the
storage tank valve and the steriliser shut-off valve closed. Then open the storage tank valve. If
the storage tank is full, empty it completely. The system is ready to operate after the second
filling.
Given downtime of the water treatment system of over three weeks (e.g. a long holiday)
considerations of safety require that you close the the water connection valve and empty
the storage tank. Then close the storage tank valve and the steriliser shut-off valve. A
service technician must perform disinfection before commissioning.

Installation and operating instructions for the Hygopure 90 water treatment system Page 17
Last updated: November 2016
Important information:
Check the water treatment system every day in the first week after disinfection for any
leaks. Thereafter make the checks on a weekly basis.
Given the downtime of the water treatment system over several months we recommend
disinfection and replacement of all pressure hoses and filter cartridges. This should be
performed by the works.
Should the decision be made to decommission the system permanently, separate the
water treatment system from the water supply. The system components are recyclable. The
old filter cartridges must be disposed of via the domestic waste.
4.6 Replacing the filter cartridges
Please note:
Hygiene grounds require that you ensure extreme cleanliness during disinfection and
when replacing the filter cartridge and the membrane. Do not touch the filter cartridge and
membrane directly with your hands; use the packaging, a clean cloth or new disposable
gloves to handle them.
As the filter housing is full of water, keep a towel ready.
We recommend that you disinfect the entire water treatment system with every filter change.
Disinfection should be performed by a service technician.
The following section describes how to replace the filter cartridges without disinfection:
Process description without system disinfection
1. Ascertain the retention quota of the membrane (see chapter 4.2)
2. Close the water connection valve to switch off the water inflow.
3. Close the steriliser shut-off valve and the storage tank valve.
4. Now open the water tap to allow the pressure to escape from the system. Then close the
water tap.
5. Measure the air pressure of the empty storage tank (at least every 2 years, see chapter 4.3).
6. Remove the complete filter group. It is best if you place the filter group on a towel. Ensure that
the hoses are not kinked.
7. Working carefully (the housing is full of water) use the filter key to open the three filter
housings by turning in anti-clockwise and remove the filter cartridge. Should the filter housing
be difficult to open, strike the filter key carefully with your hand. Dispose of the used filter
cartridge via the domestic waste.
8. Wash the filter housing with warm water and a little cleaning agent and a soft washing cloth.
Clean the respective filter housing cover as required. Rinse out all the soap thoroughly.

Installation and operating instructions for the Hygopure 90 water treatment system Page 18
Last updated: November 2016
9. Check the o-rings (black filter housing sealing ring). This may not be permitted to be damaged
or soiled. The o-rings must be cleaned and greased with every filter change. Use the
grease included from the cartridge set. The o-rings may not twist and must lie evenly in the
groove. Damaged o-rings must be changed, otherwise there is the danger of water
damage. We recommend changing the o-rings every 3 to 4 years.
10. Remove the filter cartridge packaging. Insert the filter cartridge in the corresponding filter
housing.
11. Screw the filter housing with the activated carbon block filter to the right-hand filter housing
cover, the filter housing with the sediment filter to the central filter housing cover and the filter
housing with the ion-exchanging cartridge to the left-hand filter housing cover by turning it in
clockwise. You can screw the connections tighter with the filter key. This guarantees optimum
protection against leaks. Do not screw down the filter housing too tightly otherwise this could
cause problems when attempting to open the filter housing to change the filter.
12. If you need to change the membrane, perform steps 4 to 13 listed in chapter 4.7 "Changing
the membrane". Otherwise, proceed to step 13.
13. Remove the waste water hose from the waste water valve. Clean the hose should you find
soiling (usually algae). Then return the hose to the waste water valve.
14. Open the water connection valve The system will fill with water and production begins.
15. Open the water tap. Demineralised water will drip or flow out of the water tap for c. five
minutes. Allow the system to produce for 30 minutes whilst keeping the storage tank valve
closed. This will clean the new filter cartridges. Whilst this is happening, check all the hose
connections and filter housings for leaks.
16. Now close the water tap and open the storage tank valve. Once you no longer hear the click
of the eco pump, the storage tank is full.
17. Open the steriliser shut-off valve. The system is now ready for operation
Check the water treatment system every day in the first week after changing the filter for
any leaks. Thereafter make the checks on a weekly basis.