Jura IMPRESSA C9 User manual

The IMPRESSA C9 Manual
The ‘IMPRESSA Manual’ has been awarded the seal of
approvalbytheindependentGermanTechnicalInspection
Agency, TÜV SÜD, due to its easy-to-understand style, its
thoroughness and coverage of safety aspects.

2
Your IMPRESSA C9
Control elements 4
Proper use 6
For your safety 6
The IMPRESSA C9 Manual 8
Symbol description.......................................................................................................................................8
1 IMPRESSA C9 9
Connector System©....................................................................................................................................10
JURA on the Internet....................................................................................................................................10
Knowledge Builder.......................................................................................................................................10
2 Preparing and using for the first time 11
Set up..............................................................................................................................................................11
Filling the water tank....................................................................................................................................11
Filling the bean container............................................................................................................................11
First-time use................................................................................................................................................12
Using and activating filter..........................................................................................................................13
Determining water hardness and adjusting............................................................................................14
Adjusting the grinder..................................................................................................................................15
Switching on.................................................................................................................................................16
Switching off.................................................................................................................................................16
3 Familiarising yourself with the control options 17
Preparation at the touch of a button........................................................................................................18
One-off settings before and during preparation....................................................................................18
Adjusting the default amount of water to suit the cup size.................................................................19
Permanent settings in programming mode..........................................................................................20
Query information and maintenance status..........................................................................................22
4 Preparation at the touch of a button 24
Ristretto, espresso and coffee...................................................................................................................24
Cappuccino...................................................................................................................................................24
Pre-ground coffee.......................................................................................................................................25
Hot milk and milk foam.............................................................................................................................26
Hot water......................................................................................................................................................27
5 Permanent settings in programming mode 28
Products........................................................................................................................................................28
Energy saving mode (Energy Save Mode, E.S.M.©)...............................................................................30
Automatic switch-off..................................................................................................................................30
Restore factory settings..............................................................................................................................31
Table of contents

3
Table of contents
Unit amount of water.................................................................................................................................32
Language......................................................................................................................................................33
6 Maintenance 34
Maintenance tips.........................................................................................................................................34
Rinse machine..............................................................................................................................................34
Filter change.................................................................................................................................................35
Clean machine.............................................................................................................................................36
Descale machine.........................................................................................................................................38
Rinsing the Cappuccino Frother...............................................................................................................40
Cleaning the Cappuccino Frother..............................................................................................................41
Disassembling and rinsing the Easy Cappuccino Frother....................................................................42
Disassembling and rinsing the Professional Cappuccino Frother......................................................42
Cleaning the bean container.....................................................................................................................43
Descaling the water tank...........................................................................................................................43
7 Display messages 44
8 Troubleshooting 46
9 Transport and environmentally neutral disposal 47
Transport / Empty system.........................................................................................................................47
Disposal.........................................................................................................................................................47
10 Technical data 48
Index 49
JURA contact details / Legal information 52

4
Control elements
Figure: IMPRESSA C9 Piano Black
Control elements
1 Cover of filler funnel for pre-ground coffee
2 Filler funnel for pre-ground coffee
3 Water tank cover
4 Water tank
5 Power cable (side of machine)
6 Coffee grounds container
7 Drip tray
8 Q On/off button
9 Fineness of grind switch
10 Bean container cover
11 Bean container
with aroma preservation cover
12 Connector System©
for removable frothers
13 Easy Cappuccino Frother
14 Height-adjustable coffee spout
15 Cup platform
5
9
1
3
2
4
6
7
12
13
14
11
15
10
8

5
Control elements
Front left:
1 Plain text display
u Ristretto button
i Espresso button
o Coffee button
cMaintenance button
vPre-ground coffee button
2 Rotary Switch cover
3 Rotary Switch
Front right:
p Cappuccino button
üMilk foam button
m Hot water button
4 Easy Cappuccino Frother
5 Professional Cappuccino Frother
6 Hot water nozzle
45
6
The Connector System©permits the use of different frothers. These are available from stockists.
4
3
1
2

6
Important information
Themachinehasbeendesignedandbuiltfordomesticuse.Itshould
only be used to prepare coffee and to heat milk and water. Use for
any other purpose will be deemed improper. JURA Elektroappa-
rate AG cannot accept any responsibility for the consequences of
improper use.
Before using the machine always carefully read and comply with all
these instructions. Keep this manual close to the IMPRESSA and, if
appropriate, pass it on to the next user.
Please read and note carefully the following important safety infor-
mation.
By doing this, you can avoid the life-threatening danger of electric
shock:
ZNever use a machine which has been damaged or with a
defective power cable.
ZForinformationonwhattodoincaseofdamage,forexample
ifthereisasmellofburning,unplugthemachineimmediately
from the mains supply and contact the JURA service centre.
ZIf the power cable for this machine is damaged, it must be
repairedeitherdirectlybyJURAorbyaJURAapprovedservice
centre.
ZMake sure that the IMPRESSA and the power cable are not
located close to hot surfaces.
ZBecarefultoensure that thepowercable doesnotgetcaught
and does not rub against sharp edges.
ZNever open and repair the machine yourself. Do not modify
themachinein anywaythat isnotdescribedintheIMPRESSA
Manual. The machine contains live parts. If opened, there is a
danger of serious injury. Repairs may only be carried out by
JURA approved service centres, using original spare parts and
accessories.
There is a risk of scalds or burns on the spouts or on the nozzle:
ZPlace the machine out of the reach of children.
ZDo not touch any hot parts. Use the handles provided.
ZBe careful to ensure that the appropriate nozzle is installed
and clean. The nozzle or parts of the nozzle might come off if
the parts are not assembled correctly or a blockage occurs.
For your safety
Proper use

7
Important information
A defective machine is not safe and could cause injury or fire. To
avoid damage and any associated risk of injury or fire:
ZNeverallowthepowercabletolooselyhangdown.Thepower
cable can be tripped over or damaged.
ZProtect your IMPRESSA from environmental influences such
as rain, frost and direct sunlight.
ZDo not put the IMPRESSA, cable or connections in water.
ZDo not put the IMPRESSA or any individual parts in the dish-
washer.
ZSwitch your IMPRESSA off with the On/Off button before
cleaning it. Always wipe your IMPRESSA with a damp cloth
rather than a wet one, and protect it from prolonged water
splash.
ZOnly connect the machine to a power supply in accordance
with the information on the rating plate. The rating plate is
locatedontheundersideofyourIMPRESSA. Furthertechnical
data is given in Chapter 10 ‘Technical Data’.
ZUse only original JURA care products. Use of accessories that
are not explicitly recommended by JURA could damage the
IMPRESSA.
ZDonotuseanycoffeebeanstreatedwithadditivesorcaramel-
ised coffee beans.
ZAlways fill the water tank with cold, fresh mains water.
ZIf you are absent for a prolonged period of time, turn the
machine off.
Risk to children and persons with limited capabilities in operating
machines:
ZThe machine is not designed to be operated by children and
persons with limited capabilities.
ZThe machine may only be used by persons who are able to
operate the machine safely.
Safe handling of the CLARIS filter cartridges:
ZFilter cartridges should be kept out of the reach of children.
ZStore them dry in the sealed package.
ZProtect them from heat and direct sunlight.
ZDo NOT use damaged filter cartridges.
ZDo NOT open filter cartridges.

8
The IMPRESSA C9 Manual
You are holding the manual for your IMPRESSA C9 in your hand. It
will help you to familiarize yourself with your IMPRESSA safely and
quickly and teach you the full range of facilities it offers.
Chapter 2, ‘Preparing and using your IMPRESSA for the first time’,
explains step-by-step how to set up and prepare the IMPRESSA.
Chapter 3, ‘Familiarising yourself with the control options’ is impor-
tant for you to read as you are familiarising yourself with your
IMPRESSA. It invites you to actively explore all the different coffee
experiences that it offers.
All the other chapters are intended to help you when you have a
specific query.
If you use the IMPRESSA C9, you will become a master at preparing
exciting coffee specialities, you will be a Barista!
Youcandownloadtheshortoperatinginstructionsforyourmachine
from the JURA website (www.jura.com).
The IMPRESSA C9 Manual
Symbol description
Warnings
CAUTION
AlwaystakenoteofanyinformationmarkedwiththeCAUTIONorWARNINGsymbol.
The signal word WARNING points out potential risk of serious injury, and the signal
word CAUTION potential risk of slight injury.
CAUTION The CAUTION symbol is used to draw attention to circumstances which could cause
the machine to become damaged.
Symbols used
EInformation and tips to make things easier for you as you use your IMPRESSA.
@References to the online JURA website, where you can find interesting further infor-
mation: www.jura.com.
TPrompttotakeaction.Thissymbolmeans thatyouarebeing promptedtoperform
some action.

9
1 IMPRESSA C9
The new entry level model in the One Touch Cappuccino league is
sure to please all cappucino fans with its simple ‘touch of a button’
functionwithouthavingtomovethecup.Inelegantpianoblackand
with a new user interface, the high-quality IMPRESSA C9 is fully in
keepingwithcurrenttrendsandexudesanauraofsuperiority,dura-
bilityandcompetence.Itimpressivelydemonstratestheseattributes
with each coffee speciality that you enjoy.
ZOne Touch Cappuccino: Your IMPRESSA C9 makes a cup of
cappuccino at the touch of a button, without you having to
movethecup.Hotmilkfoam,flowingintothecupand slowly
starting to fill it. Steam which rises, awakening the anticipa-
tion of a delicious speciality. Aromatic coffee, blending with
the milk, pushing up the milk foam topping. These are the
protagonists in a sensuous drama – the drama of perfect cof-
fee preparation.
ZSimpleoperation:Withtheclearlyarrangedcontrolelements
and the easy-to-understand text and graphic display, opera-
tionof the IMPRESSAC9is also simpleforbeginners. You can
navigate effectively through the individual programme steps
by simply turning and pressing the Rotary Switch. The focus
is on your personal taste. Simply select the coffee strength,
amount of water and temperature according to your individ-
ual preferences.
ZEnergy saving mode (Energy Save Mode, E.S.M.© ): The
IMPRESSA C9 actively assists you in saving energy. With the
EnergySavingModeyoucanadjusttheenergysavingpoten-
tial to suit the way you like to enjoy your beverages.
ZZero-Energy Switch (On/Offbutton):When the IMPRESSAis
switched off with the On/Off button, the machine consumes
less than 0.01 W of standby energy.
Coffee that fulfils your
wildest dreams
1 IMPRESSA C9

10
1 IMPRESSA C9
ZHeight-adjustable coffee spout: The height of the coffee
spout, which can be adjusted within a range of 65 to 111 mm,
canbeadaptedtoallcupsizesonacontinuousscale.Thispre-
vents coffee splashing on the machine and is your guarantee
for a rich, thick crema.
The Connector System©permits the use of different cappuccino
frothers:
ZProfessional Cappuccino Frother
UCappuccino, latte macchiato
UHot milk and milk foam
ZEasy Cappuccino Frother
UCappuccino
UMilk foam
Visit us on the Internet.
@ At www.jura.com you will find interesting and up-to-date
information on your IMPRESSA and on every aspect of cof-
fee.
You can familiarise yourself with your IMPRESSA C9 in a fun way on
the PC.
@ The Knowledge Builder awaits you at www.jura.com. The
interactive assistant, LEO, will support you and explain the
benefits of and how to use your IMPRESSA.
Connector System©
JURA on the Internet
Knowledge Builder

11
2 Preparing and using your IMPRESSA for the first time
Thischapterprovidesyouwiththeinformationyouneedtouseyour
IMPRESSA without any problems. You will prepare your IMPRESSA
step-by-step for your first coffee experience.
KeepthepackagingforyourIMPRESSA.Itshouldbeusedtoprotect
the machine during transportation.
When setting up your IMPRESSA, please note the following:
ZSet the IMPRESSA down on a horizontal surface that is not
sensitive to water.
ZChoose a spot for your IMPRESSA which is protected against
overheating. Ensure that the ventilation slots are not covered.
To enjoy perfect coffee we recommend changing the water every
day.
Milk, mineral water or other liquids can damage the water tank or
the machine.
TOnly fill the water tank with fresh, cold water.
TRemove the water tank and rinse it with cold water.
TFill the water tank with fresh, cold water and reinsert.
Thebeancontainerhasanaromapreservationcover.Thiswillensure
that your coffee beans retain their aroma for longer.
Coffee beans which have been treated with additives (e.g. sugar),
pre-ground or freeze-dried coffee will damage the grinder.
TOnly use untreated coffee beans to refill the bean container.
TOpenthecoverofthebeancontainerandremovethearoma
preservation cover.
TRemove any dirt or foreign objects inside the bean con-
tainer.
TFill the bean container with coffee beans, then close the
aroma preservation cover and the bean container cover.
Set up
Filling the water tank
CAUTION
Filling the bean con-
tainer
CAUTION
2 Preparing and using for the first time

12
2 Preparing and using your IMPRESSA for the first time
If the machine is operated with a defective power cable, there is a
danger of electric shock.
TNever use a machine which has a defective power cable.
Precondition: The water tank and bean container are full.
TInsert the mains plug into a power socket.
Q T Press the On/Off button to switch the IMPRESSA on.
The pre-set language appears on the display.
TOpen the cover of the Rotary Switch.
The Rotary Switch lights up.
g T Turn the Rotary Switch until the desired language is dis-
played. For Example: LANGUAGE ENGLISH
k T Press the Rotary Switch to confirm the language.
OK appears briefly on the display to confirm the setting.
PRESS RINSE, the maintenance button clights up.
TClose the cover of the Rotary Switch.
TPlace a receptacle under the frother.
c T Press the maintenance button.
SYSTEM FILLING, the system fills up with water. A
small amount of water flows from the frother.
Thisoperationstopsautomatically,thefollowingappearson
the display: HEATING.
PRESS RINSE, the maintenance button clights up.
TPlace a receptacle under the coffee spout.
c T Press the maintenance button.
RINSING, the machine rinses. The operation stops auto-
matically.
READY, your IMPRESSA is ready to use.
EWhen a coffee speciality has been prepared for the first time,
it is possible that FILL BEANS is shown on the display as
the grinder has not yet been completely filled with coffee
beans. In this case prepare another coffee speciality.
First-time use
WARNING

13
2 Preparing and using your IMPRESSA for the first time
YourIMPRESSAnolongerhastobedescaledifyouareusingCLARIS
filter cartridges.
@ Youcanalsotryoutthe‘Insertfilter’operationonline.Visitthe
Knowledge Builder at www.jura.com.
EPerformthe‘Insertfilter’operationwithoutinterruptions.This
will ensure that your IMPRESSA always produces at its best.
Precondition: READY is displayed.
TOpen the cover of the Rotary Switch.
k T Keep the Rotary Switch pressed until RINSE appears on
the display.
g T Turn the Rotary Switch until FILTER - is displayed.
k T Press the Rotary Switch to enter the programme item.
NO -
g T Turn the Rotary Switch until YES w is displayed.
k T Press the Rotary Switch to confirm the setting.
OK appears briefly on the display to confirm the setting.
INSERT, the maintenance button clights up.
TClose the cover of the Rotary Switch.
TRemove the CLARIS filter cartridge from the Welcome Pack.
TRemove the water tank and empty it.
TLift the cartridge holder and insert the filter cartridge into
the water tank, applying slight pressure.
TClose the cartridge holder. It will click into place audibly.
TFill the water tank with fresh, cold water and reinsert.
TPlace a receptacle (at least 500 ml) under the frother.
c T Press the maintenance button.
FILTER RINSING. Water will flow out of the frother.
EYou can interrupt rinsing of the filter at any time by pressing
anybutton.PresstheMaintenancebuttonctocontinuerins-
ing of the filter.
EThe water may be slightly discoloured. This is not harmful to
health and does not affect the taste.
Using and activating
filter

14
2 Preparing and using your IMPRESSA for the first time
Filter rinsing stops automatically after approx. 500 ml.
HEATING appears on the display, then READY is dis-
played. The filter is now activated.
EHowever, if you are using the CLARIS filter cartridge and have
activated it, you will not be able to adjust the water hard-
ness.
Theharderthewateris,themorefrequentlytheIMPRESSAneedsto
be descaled. It is therefore important to adjust the water hardness.
The water hardness can be adjusted on a continuous scale between
1° dH and 30° dH. This can also be deactivated, which means that
the IMPRESSA will not let you know when it has to be descaled.
You can find out what the water hardness is by using the Aquadur®
test strip supplied as standard.
THold the test strip briefly (for one second) under flowing
water. Shake off the water.
TWait for about one minute.
TYou will then be able to read the degree of water hardness
from the discolouration of the Aquadur® test strip and the
description on the packaging.
You can now adjust the water hardness.
Example: To change the water hardness from 16°dH to
25°dH, proceed as follows:
Precondition: READY is displayed.
TOpen the cover of the Rotary Switch.
k T Keep the Rotary Switch pressed until RINSE appears.
g T Turn the Rotary Switch until HARDNESS is displayed.
k T Press the Rotary Switch to enter the programme item.
16°dH
g T Turn the Rotary Switch until 25°dH is displayed.
k T Press the Rotary Switch to confirm the setting.
OK appears briefly on the display to confirm the setting.
g T Turn the Rotary Switch until EXIT is displayed.
k T Press the Rotary Switch to exit programming mode.
READY appears on the display.
TClose the cover of the Rotary Switch.
Determining water
hardness and adjusting

15
2 Preparing and using your IMPRESSA for the first time
You can adjust the grinder continuously to suit the roast of your
coffee.
Ifyouadjustthefinenessofgrindwhenthegrinderisnotoperating,
the grinding wheel could be damaged.
TOnly adjust the fineness of grind when the grinder is run-
ning.
The fineness of grind setting is correct if the coffee flows regularly
from the coffee spout. A fine, thick crema is also formed.
Our recommendations:
ZSelect a fine setting for a light roast.
UIf the fineness of grind setting is too fine, the coffee only
drips from the coffee spout.
ZSelect a coarse setting for a darker roast.
UIf the fineness of grind is too coarse the coffee flows too
quickly from the coffee spout.
Example:Tochangethefinenessofgrindduringcoffeepreparation,
proceed as follows:
TOpen the cover of the bean container.
TRemove the aroma preservation cover.
TPlace a cup under the coffee spout.
o T Press the Coffee button.
The grinder starts and 1 COFFEE is displayed. After this,
the coffee strength is briefly displayed.
TTurn the fineness of grind switch to the desired position
while the grinder is running.
The coffee will be prepared and the fineness of grind is
adjusted.
TClose the aroma preservation cover and the cover of the
bean container.
Adjusting the grinder
CAUTION

16
2 Preparing and using your IMPRESSA for the first time
Q T Press the On/Off button to switch the IMPRESSA on.
HEATING is displayed.
PRESS RINSE, the maintenance button clights up.
TPlace a receptacle under the coffee spout.
c T Press the maintenance button.
RINSING, the machine rinses.
Preparation stops automatically. READY appears on the
display.
WhenyouswitchyourIMPRESSAoff,thespouts withwhichacoffee
speciality or milk have been prepared are rinsed.
TPlace a receptacle under the coffee spout and the frother.
Q T Press the On/Off button.
RINSING, the spouts used to prepare a speciality coffee
or milk are rinsed. The operation stops automatically and
your IMPRESSA is switched off.
EWhen your IMPRESSA is switched off, a hissing noise may be
audible. This is normal and does not have any effect on the
machine.
Switching on
Switching off

17
3 Familiarising yourself with the control options
WiththeIMPRESSA,youcanprepareanexcellentcoffeeormilkspe-
cialityatthetouchofabutton.Youalsohavetheoptionofadjusting
thecoffeestrengthandtemperature,aswellastheamountofwater
to your personal taste.
Thischapterwillallowyoutobecomefamiliarwithallcontroloptions
withtheaidofexamples.TofamiliariseyourselfwithyourIMPRESSA,
werecommendthatyoumakeapointofactivelytryingthefacilities
described in this chapter. You will find this is well worthwhile.
Learn how to perform the following:
ZPreparation at the touch of a button
ZOne-off settings before and while your drink is being pre-
pared.
ZAdjusting the default amount of water to suit the cup size
ZPermanent settings in programming mode
EYou can stop the machine at any time while a coffee or milk
speciality or hot waterisbeingprepared.To do this, press any
button.
@ If you prefer to familiarise yourself with your IMPRESSA in a
fun way on the computer, the interactive Knowledge Builder
tutorial programme can be found on the Internet at
www.jura.com.
3 Familiarising yourself with the control options

18
3 Familiarising yourself with the control options
Prepare your favourite coffee speciality at the touch of a button.
Allcoffeespecialities arepreparedfollowingthismodelatthetouch
of a button.
Example: This is how to prepare one espresso.
Precondition: READY is displayed.
TPlace an espresso cup under the coffee spout.
i T Press the Espresso button.
1 ESPRESSO and the coffee strength is then briefly dis-
played.
Thepre-set amountofwater flowsintothecup.Preparation
stops automatically. READY appears on the display.
Example: This is how to prepare twoespressi.
Precondition: READY is displayed.
TPlace two espresso cups under the coffee spout.
i T Press the Espresso button twice (within two seconds).
2 ESPRESSI appearsonthedisplay,thepre-setamount
of water flows into the cups.
Preparation stops automatically. READY appears on the
display.
The coffee strength can be changed before preparation or during
the grinding operation.
The following coffee strengths can be selected for 1 ristretto,
1 espresso, 1 coffee and 1 cappuccino:
ZMild
ZNormal
ZStrong
EThe pre-set amount of water can be changed during the
brewing operation by turning the Rotary Switch.
One-offsettingsbeforeandduringcoffeepreparationalwaysfollow
this model. These settings are not saved.
Preparation at the
touch of a button
Preparing a coffee speciality
at the touch of a button
Preparing two coffee
specialities at the touch of
one button
One-off settings before
and during preparation

19
3 Familiarising yourself with the control options
Example: Proceed as follows to to prepare astrong cup of coffee.
Precondition: READY is displayed.
TOpen the cover of the Rotary Switch.
TPlace a cup under the coffee spout.
g T Turn the Rotary Switch until STRONG is displayed.
o T Press the Coffee button for as long as STRONG is dis-
played.
1 COFFEE /STRONG
Thepre-set amountofwater flowsintothecup.Preparation
stops automatically. READY appears on the display.
TClose the cover of the Rotary Switch.
Example: Proceed as follows to prepare a 110 ML cup of coffee.
Precondition: READY is displayed.
TOpen the cover of the Rotary Switch.
TPlace a cup under the coffee spout.
o T Press the Coffee button.
The grinding operation starts. 1 COFFEE and the coffee
strength is then briefly displayed.
g T Turn the Rotary Switch during the brewing operation until
110 ML is displayed.
The set amount of water flows into the cup. Preparation
stops automatically. READY appears on the display.
TClose the cover of the Rotary Switch.
Itiseasytomakepermanentsettingsfortheamountofwaterforall
coffeeandmilkspecialitiesaswellashot wateraccordingtothe cup
size. As in the following example, adjust the amount of water once.
Every time you prepare a drink in the future, this amount of water
will be dispensed.
The permanent settings for adapting the amount of water to to the
cupsizeforallcoffeeandmilkspecialitiesaswellashotwaterfollow
this model.
Example: To make permanent settings for the amount of water for
an espresso, proceed as follows:
Precondition: READY is displayed.
Changing the coffee
strength before preparation
Changing the amount of
water during preparation
Adjusting the default
amount of water to
suit the cup size

20
3 Familiarising yourself with the control options
TPlace an espresso cup under the coffee spout.
i T Press and hold the Espresso button.
1 ESPRESSO appears on the display.
i T Hold the Espresso button down until ENOUGH
COFFEE ? appears.
i T Release the Espresso button.
Coffee preparation will start and the espresso will flow into
the cup.
TPress any button as soon as enough espresso has flowed
into the cup.
Preparation stops automatically. OK appears briefly on the
display. The set amount of water for an espresso will be per-
manently stored. READY appears on the display.
EYou can alter these settings at any time by repeating the
above procedure.
Youcaneasilyadjust yourIMPRESSAtoyourpersonalcoffeeblends
and specialities. You can navigate through the easy-to-understand
programme steps and make permanent settings by simply turning
and pressing the Rotary Switch.
You can make the following settings with the Rotary Switch:
Permanent settings in
programming mode
Programme item Sub-item Explanation
RINSE C–CLEANING, RINSE,
C–RINSE, CLEAN,
FILTER (only when the
filter is activated),
DE-SCALE (only when the
filter is not activated),
TSelect the desired maintenance
programme.
If no action is taken, programming mode
is exited automatically after approx. five
seconds.
BUTTONS SELECT BUTTON TSelect your settings for the coffee and
milk specialities and hot water.
FILTER - YES w
NO -
TIndicate whether you operate your
IMPRESSA with or without a CLARIS filter
cartridge.
HARDNESS (is only
displayed when the
filter is not activated)
INACTIVE,
1°dH – 30°dH
TAdjust the water hardness.