Carel Compact ROC 25 User manual

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Water Treatment System
Compact ROC 25/40/80/140
Reverse osmosis system
USER MANUAL
WTS - Compact ROC
+03000130EN - ENG
Up to date version available on
www.carel.com
ENG

3
ENG
WTS +0300130EN rel. 1.0 - 05.09.2022
GENERAL WARNINGS
FAILURE TO CAREFULLY HEED THE WARNINGS SHOWN IN THIS
MANUAL COULD LEAD TO FIRE OR EXPLOSION AND CONSEQUENT
DAMAGE TO PROPERTY, INJURY OR DEATH.
• Do not store or use petrol or other ammable vapours and liquids
in the vicinity of this or other appliances.
IF YOU SMELL GAS:
1. Do not attempt to switch on any appliance;
2. Do not touch any electrical switches; do not use telephones in
the building;
3. Call the gas supplier immediately from a neighbour’s phone. Fol-
low the instructions given by the gas supplier;
4. If you cannot contact the gas supplier, call the re brigade;
• Installation and maintenance must be performed by a quali-
ed installer, service centre or gas supplier.
CAREL Industries reverse osmosis (RO) systems are advanced products,
whose operation is specied in the technical documentation supplied
with the product or can be downloaded, even prior to purchase, from the
website www.carel.com. Each CAREL product, in relation to its advanced
level of technology, requires setup/conguration/programming to be able
to operate in the best possible way for the specic application. Failure to
complete such operations, which are required/indicated in the user manu-
al, may cause the nal product to malfunction; CAREL accepts no liability in
such cases. The customer (manufacturer, developer or installer of the nal
equipment) accepts all liability and risk relating to the conguration of the
product in order to reach the expected results in relation to the specic
nal installation and/or equipment. CAREL may, based on specic agree-
ments, act as a consultant for the installation/commissioning/use of the
unit, however in no case does it accept liability for the correct operation
of the RO system and the nal installation if the warnings or suggestions
provided in this manual or in other product technical documents are not
heeded. In particular, as well as observing the above warnings and sug-
gestions, the following warnings must be observed for correct use of the
product:
ELECTRIC SHOCK HAZARD: the RO system contains live electrical com-
ponents.Disconnect the mains power supply before accessing inside
parts or during maintenance and installation.
WATER LEAK HAZARD: the RO system automatically and constantly lls/
drains certain quantities of water. Malfunctions in the connections or in
the humidier may cause leaks.
Environmental conditions, fuel and power supply voltage must all com-
ply with the specied values. All other uses and modications made to
the appliance that are not authorised by the manufacturer are considered
incorrect. Liability for injury or damage caused by the incorrect use of the
appliance lies exclusively with the user.
Please note that the appliance contains live electrical devices. All service
and/or maintenance operations must be performed by specialist and
qualied personnel who are aware of the necessary precautions and are
capable of performing the operations correctly and in accordance with
the safety standards and legislation in force, with specic reference to:
1. Italian law no. 46/90: “Safety standards relating to systems in buildings”;
2. Italian Presidential Decree no. 447 of 6 December 1991:“Regulations for
the enforcement of law no. 46, dated March 5, 1990, on safety relating
to systems in buildings”;
3. Italian law no. 10/91: “Regulations for the enforcement of the national
plan for energy savings and the development of renewable sources of
energy”
CAUTION
The installation of the product must include an earth connection, using
the Schuko plug available in the RO system.
Caution:
• Disconnect the appliance from the mains power supply before access-
ing any internal parts.
• Environmental and power supply conditions must conform to the val-
ues specied on the product rating labels.
• The product is designed exclusively to demineralize drinkable water.
• Only qualied personnel who are aware of the necessary precautions
and able to perform the required operations correctly may install, oper-
ate or carry out technical service on the product.
• Only water with the characteristics indicated in this manual must be
used.
• All operations on the product must be carried out according to the
instructions provided in this manual and on the labels applied to the
product. Any uses or modications that are not authorised by the manu-
facturer are considered improper. CAREL declines all liability for any such
unauthorised use.
• Do not attempt to open the appliance in any way other than described
in the manual.
• Observe the standards in force in the place where the RO system is
installed.
• The appliance is not intended for use by persons (including children)
with reduced physical, sensory or mental capabilities, or lack of expe-
rience and knowledge, unless they have been given supervision or in-
struction concerning use of the appliance by a person responsible for
their safety.
• Do not install and use the product near objects that may be damaged
when in contact with water (or condensate). CAREL declines all liability
for direct or indirect damage following water leaks from the humidier.
• Do not use corrosive chemicals, solvents or aggressive detergents to
clean the inside and outside parts of the RO system, unless specically
indicated in the user manual.
• Do not drop, hit or shake the RO system, as the inside parts and the
linings may be irreparably damaged,
CAREL adopts a policy of continual development. Consequently, CAREL
reserves the right to make changes and improvements to any product
described in this document without prior warning. The technical speci-
cations shown in the manual may be changed without prior warning.
The liability of CAREL in relation to its products is specied in the CAREL
general contract conditions, published on the website www.carel.com
and/or by specic agreements with customers; specically, to the extent
where allowed by applicable legislation, in no case will CAREL, its employ-
ees or subsidiaries/aliates be liable for any lost earnings or sales, losses of
data and information, costs of replacement goods or services, damage to
things or people, downtime or any direct, indirect, incidental, actual, puni-
tive, exemplary, special or consequential damage of any kind whatsoever,
whether contractual, extra-contractual or due to negligence, or any other
liabilities deriving from the installation or use of the product, even if CAREL
or its subsidiaries/aliates are warned of the possibility of such damage.
Warnings

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WTS +0300130EN rel. 1.0 - 05.09.2022
Warnings
DISPOSAL
Fig. 1 Fig. 2
PLEASE READ AND KEEP.
WITH REFERENCE TO EUROPEAN UNION DIRECTIVE 2012/19/EU
ISSUED ON 4 JULY 2012 AND RELATED NATIONAL LEGISLATION,
PLEASE NOTE THAT:
• Waste Electrical and Electronic Equipment (WEEE) cannot be disposed
of as municipal waste but must be collected separately so as to allow
subsequent recycling, treatment or disposal, as required by law;
• users are required to take Electrical and Electronic Equipment (EEE) at
end-of-life, complete with all essential components, to the WEEE collec-
tion centres identied by local authorities. The directive also provides
for the possibility to return the equipment to the distributor or retailer
at end-of-life if purchasing equivalent new equipment, on a one-to-one
basis, or one-to-zero for equipment less than 25 cm on their longest
side;
• the equipment may contain hazardous substances: the improper use or
incorrect disposal of such may have negative eects on human health
and on the environment;
• the symbol (crossed-out wheeled bin, see Figure 1), if shown on the
product or on the packaging, indicates that the equipment must be dis-
posed of separately at end-of-life;
• if at end-of-life the EEE contains a battery (Figure 2), this must be re-
moved following the instructions provided in the user manual before
disposing of the equipment. Used batteries must be taken to appropri-
ate waste collection centres as required by local regulations;
• in the event of illegal disposal of electrical and electronic waste, the
penalties are specied by local waste disposal legislation.
Warranty on materials: 2 years (from production date, excluding
consumables).
Approval: the quality and safety of CAREL products are guaranteed by
the ISO 9001 certified design and production system, as well as the ,
e marks.

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WTS +0300130EN rel. 1.0 - 05.09.2022
Index
1. Introduction............................................................... 7
1.1 Typographic Distinctions......................................................................7
1.2 Documentation ..........................................................................................7
1.3 Symbols in Use............................................................................................7
1.4 Intended Use................................................................................................7
1.5 Unit sizes..........................................................................................................8
2. Safety Instructions.................................................... 9
2.1 Guidelines for Safe Operation...........................................................9
3. Transport .................................................................. 11
3.1 Overview......................................................................................................11
3.2 Interim Storage ........................................................................................11
3.3 Check for complete and correct delivery of goods...........11
3.4 Scope of delivery.....................................................................................11
4. Function and structure .......................................... 12
4.1 Mode of operation.................................................................................12
4.2 Influencing factors .................................................................................12
4.3 Operating conditions of the unit..................................................12
4.4 Operating sequence.............................................................................13
4.5 Mechanical construction ...................................................................14
4.6 Flowchart.....................................................................................................15
5. Mechanical installation.......................................... 18
5.1 Environment Parameters to be met and Mounting
Recommendations ................................................................................18
5.2 Installation steps......................................................................................18
6. Water connection.................................................... 21
7. Electrical connection.............................................. 22
7.1 Procedure for electrical installation.............................................22
7.2 Electrical installation check list.......................................................22
7.3 Inputs and outputs of the main board......................................22
8. Initial start-up and flushing
of the membrane(s)................................................ 23
8.1 System start-up after initial commissioning ..........................23
8.2 Adjusting the metering pump.......................................................24
9. Maintenance ............................................................ 25
9.1 General..........................................................................................................25
9.2 Safety instructions for maintenance...........................................25
9.3 Change prefilter.......................................................................................26
9.4 Membrane exchange...........................................................................26
9.5 Maintenance scheme...........................................................................26
10. Decomissioning....................................................... 28
10.1 Dismantling................................................................................................28
10.2 Disposal after dismantling.................................................................28
11. Control ...................................................................... 29
11.1 The control panel....................................................................................29
11.2 Operating states ......................................................................................30
11.3 Menu navigation.....................................................................................32
11.4 Setting options at operator level ..................................................33
11.5 Menu Structure........................................................................................34
11.6 Setting options at service level......................................................36
11.7 Wiring diagram.........................................................................................47
12. Error description ..................................................... 48
13. Spare parts ............................................................... 50
14. Commissioning report /
maintenance documentation............................... 52
15. Technical specifications ......................................... 54
16. Antiscalant ............................................................... 55
Index

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Introduction
WTS +0300130EN rel. 1.0 - 05.09.2022
Dear Customer,
Thank you for choosing a CAREL reverse osmosis unit. CAREL reverse osmoses units are state of the art.
In order to operate your CAREL reverse osmosis unit safely, properly and efficiently, please read these operating
instructions.
Only use the CAREL R.O. unit in faultless condition and for its intended use, being aware of safety and hazards, and
observing all instructions in this manual.
If you have additional questions, please contact your expert dealer.
For all technical questions or spare parts orders, please be prepared to provide unit type and serial number (see name
plate on the unit).
1.1 Typographic Distinctions
•preceded by a bullet: general specifications
»preceded by an arrow: Procedures for servicing or maintenance which should or must be performed in the indicated order
þinstallation step which must be checked off.
italics Terms used with graphics or drawings
1.2 Documentation
Retention
Please retain these operating instructions in a secure, always accessible location. If the product is resold, turn the
documentation over to the new operator. If the documentation is lost, please contact CAREL.
Versions in Other Languages
These operating instructions are available in several languages. If interested, please contact CAREL or your CAREL dealer.
1.3 Symbols in Use
Specific Symbols related to Safety Instructions
According to ANSI Z535.6 the following signal words are used within this document:
DANGER indicates a hazardous situation which, if not avoided, will result in death or serious injury.
WARNING indicates a hazardous situation which, if not avoided, could result in death or serious injury.
CAUTION indicates a hazardous situation which, if not avoided, could result in minor or moderate injury.
NOTICE is used to address practices not related to physical injury.
1.3.1 General Symbols
Notice: This symbol is used whenever a situation requires special attention beyond the scope of safety instructions.
1.4 Intended Use
CAREL reverse osmosis unit is used to produce fully demineralized water.
It may only be used in accordance with its intended purpose.
Notice:
• Intended use also includes compliance with the assembly, disassembly and reassembly, commissioning, operating and main-
tenance conditions and disposal measures prescribed by us.
• Only qualied and authorized personnel may work on and with the system. Persons who carry out transport or work on
and with the system must have read the relevant parts of the operating instructions and in particular the chapter “Safety
instructions”. In addition, the personnel must be informed by the operator of any hazards that may exist. Leave a copy of the
operating manual at the place of use of the unit.
• The installation of additional equipment is only permitted with the written approval of the manufacturer.
Use of the system
• The system is intended for operation (with use of feed water in the drinking water sector) of humidication systems.
• The limit and guide values as per the regulations enforced in the installation country must be taken into account.
• Frost protection and protection against excessive moisture must be ensured
• The permitted surrounding temperature is between 5° C and 40° C
• The use of a system separator according to DIN 1988, part 4 and DIN EN 1717 is obligatory.
1. INTRODUCTION

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Introduction WTS +0300130EN rel. 1.0 - 05.09.2022
Notice:
• Avoid water temperatures above 20°C to prevent possible germ growth.
• Due to their construction, CAREL reverse osmosis systems are not intended for outdoor installation.
1.5 Unit sizes
The following reverse osmosis units belong to the ROC (Reverse-Osmosis-Compact) series:
• ROC025: max. permeate production rate of 25 l/h
• ROC040: max. permeate production rate of 40 l/h
• ROC080: max. permeate production rate of 80 l/h
• ROC0140: max. permeate production rate of 140 l/h
The following reverse osmosis plants belong to the ROL (Reverse-Osmosis-Large) series
• ROL160: max. permeate production rate of 160 l/h
• ROL320: max. permeate production rate of 320 l/h
• ROL460: max. permeate production rate of 460 l/h
• ROL600: max. permeate production rate of 600 l/h
• ROL1000: max. permeate production rate of 1000 l/h
• ROL1200: max. permeate production rate of 1200 l/h

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Safety Instructions
WTS +0300130EN rel. 1.0 - 05.09.2022
2. SAFETY INSTRUCTIONS
These safety instructions are required by law. They promote workplace safety and accident prevention.
2.1 Guidelines for Safe Operation
2.1.1 Scope
Comply with the accident prevention regulation„DGUV Regulation 3“ to prevent injury to yourself and others. Beyond
that, national regulations apply without restrictions. This way you can protect yourself and others from harm.
2.1.2 Unit control
Do not perform any work which compromises the safety of the unit. Obey all safety instructions and warnings present
on the unit.
In case of a malfunction or electrical power disruption, switch off the unit immediately and prevent a restart. Repair
malfunctions promptly.
Caution: Restricted use.
IEC 60335-1 stipulates as follows:
This device may be used by children of eight years of age and above as well as by persons with reduced physical,
sensory or mental capabilities or lack of experience and knowledge so long as they are supervised or have been
instructed regarding the safe use of the device and understand the hazards that may result from it. Cleaning and
maintenance of the unit must not be undertaken by children without supervision.
Notice: The installation room must be adequately ventilated and be equipped with a floor drain. A water stop
mechanism (e.g. leakage detector) can be used as an alternative.
2.1.3 Unit operation
Caution: Danger of scalding!
Hot surfaces can cause injuries. Protect yourself with suitable protective equipment.
Notice: Water leaks possible due to defective connections or malfunctions.
• Before starting work, the water supply to the reverse osmosis system (RO system) must be shut o.
• The system may be under pressure. Release pressure before starting work.
• The reverse osmosis (RO) systems continuously produce permeate (product water) and concentrate (waste water).
Connections and water-carrying components must be checked regularly for correct functionality.
Notice: Risk of material damage!
• The unit may be damaged if switched on repeatedly following a malfunction without prior repair. Rectify defects immediately!
• Regularly check that all safety and monitoring devices are functioning normally. Do not remove or disable safety devices.
Notice: It is essential to leave the RO system connected to the power supply permanently. Only then the automatic
rinsing can be carried out (protection against germs).
Switch device ON/OFF
The system can be switched on/off in different ways:
» Interrupt the power supply (pull the plug) or
» operate the main fuse switch (only ROL units) or
» press the ESC key (for about 2 seconds).
2.1.4 Mounting, dismantling, maintenance and repair of the unit
Notice: the CAREL reverse osmosis units are IP20 protected. Make sure that the unit is not object to dripping water
in the mounting location.
Notice: Do not install CAREL reverse osmosis systems above electrical equipment such as fuse boxes, electrical
appliances, etc. In the event of a leakage, leaking water can damage the underlying electrical systems.
Notice:
• Use genuine spare parts only
• After any repair work, have qualied personnel check the safe operation of the unit
• Attaching or installing of additional components is permitted only with the written consent of the manufacturer

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Safety Instructions WTS +0300130EN rel. 1.0 - 05.09.2022
2.1.5 Electrical
Caution: Risk of electrical shock!
Hazardous electrical voltage!
Any work on the electrical system to be performed by certified expert staff (electricians or expert personnel with
comparable training) only.
During maintenance or installation work, the device must be disconnected from the power supply and secured against
being switched on again. The absence of voltage must be ensured by a measurement.
After electrical installation or repair work, test all safety mechanisms (such as grounding resistance).
Notice
Use only original fuses with the appropriate amperage rating.
Regularly check the unit‘s electrical equipment. Promptly repair any damage such as loose connections or burned
wiring.
Responsibility for intrinsically safe installation of the CAREL reverse osmosis unit is incumbent on the installing specialist
company.

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Transport
WTS +0300130EN rel. 1.0 - 05.09.2022
3. TRANSPORT
3.1 Overview
Notice: Proceed carefully when transporting the reverse osmosis unit in order to prevent damage due to stress
or careless loading and unloading. Protect the device from moisture during transport; the storage and shipping
temperature is 5° to 40°C.
3.2 Interim Storage
Store the unit in a dry place and protect from frost and strong sunlight.
3.3 Check for complete and correct delivery of goods
Upon receipt of the unit, confirm that:
• model and serial number on the name plate match those specied in the order and delivery documents
• the equipment is complete and all parts are in perfect condition
Notice: In case of damage from shipment and/or missing parts, immediately notify the carrier or supplier in writing.
3.4 Scope of delivery
ROC
• reverse osmosis unit incl. control
• 2 membranes (ROC025 and ROC140: only 1 membrane)
• 1 prelter (ROC140: 2 prelters)
• manual
• connection material

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Function and structure WTS +0300130EN rel. 1.0 - 05.09.2022
4. FUNCTION AND STRUCTURE
4.1 Mode of operation
General principle of reverse osmosis
Osmosis is a natural process, it is understood as the one-sided diffusion of a liquid (here the feed water) through a semi-
permeable membrane. A semi-permeable membrane is only permeable for certain substances.
As the liquid moves through a semi-permeable membrane, the pressure on the side with the lower concentration
decreases and at the same time the pressure of the more concentrated solution increases until a balance is reached,
stopping the water flow. Pressure difference between the two liquids is called“osmotic pressure”.
Reverse osmosis, on the other hand, is a technical process in which the natural process is reversed. It involves applying
a pressure higher than the osmotic pressure to the concentrated liquid so that the water flows in the opposite direction
through the semi-permeable membrane and thus separates the salts solved in the water.
Using this principle, water can be demineralized for drinking water as well as for process and industrial applications.
4.2 Inuencing factors
The performance of the reverse osmosis membrane depends strongly on the following parameters:
Water inlet pressure at the membrane:
– By lowering the working pressure, a reduction in permeate production can be achieved.
– By increasing the working pressure, an increase in permeate production is also achieved.
– The pump pressure can be changed by turning the screw on the pump (see chapter 8.4).
– Be careful not to exceed the maximum pump pressure!
Salt content of the feed water:
The higher the salt content, the faster the membrane wear.
Temperature of the feed water:
The ROC unit is set up for a feed water temperature of 15°C. Any difference from this temperature will affect the
production quantity and the quality of the permeate.
The following table shows the variation of the permeate production quantity by 3% per differing 1°C.
Temperature 15 °C + 1 + 2 + 3 + 4 + 5 + 6 + 7 + 8
Correction factor 1 1,03 1,06 1,09 1,12 1,15 1,18 1,21 1,25
Temperature 15 °C - 1 - 2 - 3 - 4 - 5 - 6 - 7 - 8
Correction factor 1 0,96 0,92 0,88 0,84 0,8 0,77 0,74 0,7
The colder the feed water, the lower the permeate production and the better/lower the conductivity.
The warmer the feed water, the higher the production quantity, but the lower the permeate quality.
4.3 Operating conditions of the unit
The ROC system can be fed with water from the normal water supply if the water has a maximum hardness up to
30°fH.
In order to avoid a reduction of the operating capacity, the water to be treated must comply with certain parameters:
Iron < 0,15 ppm
Manganese < 0,05 ppm
Aluminium < 0,05 ppm
SDI (Silt Density Index) < 3
Water temperature 5 to 25 °C
Free chlorine < 0.25 ppm
Hardness < 30 °fH
Oil and fat < 0.1 mg/l
COD < 10 mg/l
TOC < 3 mg/l
TDS < 1000μS/cm
SiO2 < 15 ppm
turbidity < 1 NTU
In some cases the reverse osmosis unit cannot be fed with water from the normal water supply because some elements
contained in the water (free chlorine, iron, suspended solids, hardness minerals) would disturb the osmotic process and
damage the membranes, sometimes irreversibly.
In these cases a pre-treatment is necessary, e.g: De-ironing, de-chlorination, softening with resins or chemical softening
(dosing pump with anti-fogging agent), depending on the characteristics of the water to be treated.

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Function and structure
WTS +0300130EN rel. 1.0 - 05.09.2022
4.4 Operating sequence
The feed water (raw water) is pumped through the pre-filter, which guarantees the de-chlorination and a final filter
capacity of 5 µm. This ensures the necessary clarity of the water at the membrane inlet. The feed water pressure must be
at least 2 to 5 bar during normal operation to ensure a correct supply pressure at the pump inlet.
The water then flows through the water inlet solenoid valve SV1 and is then directed by the pressure pump at high
pressure to the membrane(s).
The pressure switch PSHIGH provides a signal when the pressure exceeds 10 bar at the membrane inlet (ROC140 only).
Pure water (permeate) passes through the membrane; the salts solved in the water are retained by the membrane and
drained off (concentrate).
The permeate now flows via the pure water line (scope of delivery) to the expansion vessel or the permeate collecting
tank.
The quality of the permeate leaving the system is controlled by the conductivity sensor (ECPROBout).
The production process stops automatically when the water outlet pressure has reached
4 bar at the pressure switch PSMAX. The pressure in the following circuit is kept constant by the expansion vessel.
If the pressure in the following circuit at the pressure switch PSMIN falls below 2 bar (when the expansion vesel is
empty), the unit starts permeate production again.
If the inlet pressure falls below 0.8 bar, the pressure switch PSLOW gives the corresponding alarm and interrupts
operation.
Notice: The reverse osmosis (R.O.) units of the ROC series should not operate without an expansion vessel or
permeate collecting tank.

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Function and structure WTS +0300130EN rel. 1.0 - 05.09.2022
4
12
11
9
8
6
5
2
13
1
7
19
18
14
Ø 10
Ø 10
20
3
10
4
12
10
9
14
Ø 10
21
5
16 2
13
1
7
Ø 8
6
3
8
17 15
11
Fig. 4.a
1 CB-EC activated carbon lter* 12 Flow limiter concentrate
2 Pressure gauge (feed water) / PI 13 Concentrate pipe
3 Water inlet solenoid valve 14 Permeate pipe
4 Pressure switch PS LOW 15 T-piece connection expansion vessel
5 control 16 Expansion vessel
6 Rotary vane pump 17 Manual control valve / RV
7 Motor 18 Flush valve (solenoid valve)
8 Pressure gauge membrane inlet / PI 19 Pressure switch / PS HIGH
9 Membrane vessel 20 Sediment lter
10 Pressure switch / PS MIN 21 Conductivity sensor
11 Pressure switch / PS MAX
ROC140
4.5 Mechanical construction
ROC025 to 080
The devices of the CAREL ROC
series are designed for wall mounting.
Fig. 4.b

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Function and structure
WTS +0300130EN rel. 1.0 - 05.09.2022
4.6 Flowchart
F Prelter
CV Non-return valve
PS Pressure switch
BV Manual ball valve
C.P. Control
FR Flow limiter
SV Solenoid valve
PI Pressure gauge
EV Expansion vessel
RV Manual control valve
EC Conductivity sensor
1 Feed water
2 Permeat
3 Concentrate
4 Blending kit (optional)

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Function and structure WTS +0300130EN rel. 1.0 - 05.09.2022
F Prelter
CV Non-return valve
PS Pressure switch
BV Manual ball valve
C.P. Control
FR Flow limiter
SV Solenoid valve
PI Pressure gauge
EV Expansion vessel
RV Manual control valve
EC Conductivity sensor
1 Feed water
2 Permeat
3 Concentrate
4 Blending kit (optional)

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Function and structure
WTS +0300130EN rel. 1.0 - 05.09.2022
F Prelter
CV Non-return valve
PS Pressure switch
BV Manual ball valve
C.P. Control
FR Flow limiter
SV Solenoid valve
PI Pressure gauge
EV Expansion vessel
RV Manual control valve
EC Conductivity sensor
1 Feed water
2 Permeat
3 Concentrate
4 Blending kit (optional)

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Mechanical installation WTS +0300130EN rel. 1.0 - 05.09.2022
5. MECHANICAL INSTALLATION
Caution: Risk of foot injuries!
Prevent unit from dropping during installation! Helping hand of a second person is advisable.
Caution: Risk of electrical shock!
Hazardous electrical voltage. During installation, the unit must be disconnected from power supply and secured against being switched on
again. The absence of voltage must be ensured by a measurement.
5.1 Environment Parameters to be met and Mounting
Recommendations
When selecting the installation site for the reverse osmosis unit, take the following into account:
• The minimum clearances indicated in the tting measures section must be observed in order to ensure adequate unit venti-
lation and allow for unobstructed access in case of maintenance
• Protection class IP20
• By design, CAREL reverse osmosis units are not qualied for outdoor installation (electronical components and water-bearing
parts may be damaged)
• Ambient temperature must lie between
• +5 and +40 °C (+41 and +104 °F) in order to protect the unit electronics against damage; frost may damage the solenoid valve
and pump, as well as make hoses burst.
• Avoid environments with excessive humidity, as it could have negative eects on the electronics.
• Installation in closed rooms requires aeration and, if necessary temperature conditioning in order to meet the environmental
conditions.
• Make use of existing water connections for supply and draining.
• Mount the unit on a stable, preferably solid wall with the required load-bearing capacity required (s. unit technical specica-
tions). If such a wall is not at hand, the unit may be attached to a stand bracket rmly anchored to the oor.
• For correct operation it is necessary that the unit is mounted vertically and horizontally perpendicular.
• The optimal feed water pressure of the reverse osmosis (RO) units is in the range of 2 bar to 5 bar. If these values are not rea-
ched, the installation of a pressure reducer or a booster pump is necessary.
• The on-site waste water connection must be a free outow according to DIN EN 1717.
• The installation room must be well ventilated and equipped with a oor drain. Alternatively, a water stop device (e.g. leakage
detector) can be used.
5.2 Installation steps
5.2.1 Feed water connection
» Connect the feed water inlet to the system. The diameter of the raw water pipe must be at least equal to the
diameter of the connection piece.
Fig. 5.a
» Observe the information in the technical data.
» Connect a shut-off valve upstream of the system.

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Mechanical installation
WTS +0300130EN rel. 1.0 - 05.09.2022
5.2.2 Permeate line connection
» A short piece of hose is installed at the outlet port of the permeate in the factory. Remove this and replace it
with the white hose Ø10 mm (included in the scope of delivery).
Fig. 5.b
Notice: Never use the RO unit with the permeate line closed!
5.2.3 Connection of the expansion vessel
» Mount the holder* of the expansion tank on a stable wall.
» Seal the thread of the holder* (e.g. with Teflon tape).
» Mount the expansion tank on the holder*.
» Install the adapter* under the holder.
» Connect the following fitting to the Ø10 ball valve with a piece of white hose (diameter 10 mm).
Fig. 5.c
» With the rest of the hose, connect the ball valve to the T-piece.
Fig. 5.d
Notice: The expansion tank should be installed 3 5 m close to the R.O. unit.
Notice: Do not connect the permeate line to the expansion vessel until all other commissioning steps (especially
flushing the membranes) have been completed.
* Included in the delivery of the optionally available expansion vessel.
5.2.4 Connection of the concentrate line
» Connect the free connection of the flow limiter (with integrated backflow preventer) with the black hose (Ø
see technical data) with slope to a free flow.
Notice: Ensure a free outlet and discharge according to DIN EN 1717. Pay attention to the minimum requirement for
the free flow distance (between the drain hose and the siphon) of 26 mm to prevent microbial contamination.
Notice: The colour of the supplied hoses indicates their use:
White: for permeate Black: for concentrate
(PE hose connection: “John Guest” plug connection)

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Mechanical installation WTS +0300130EN rel. 1.0 - 05.09.2022
5.2.5 Inserting the prelter cartridge(s)
Before installing the filter set in the preffilter container, it must be ensured that the feed water line is closed and thus no
pressure is applied.
» Remove the filter container(s) using the screw driver supplied.
» Then install the new filter insert as shown.
» Refit the filter container(s) and screw tight.
Notice: If there are two prefilters ( ROC-140), insert the green activated carbon filter first.
Prefilter and membrane position
Fig. 5.e
5.2.6 Inserting the membrane(s)
Before installing the membranes in the membrane container, it must be ensured that:
– the feed water line is closed and thus no pressure is applied.
– the unit is out of power.
ROC025/040/080:
» Unscrew the cap of the membrane container and install the membrane.
» Pay attention to the installation direction (black lip seal downwards).
» Make sure that the membrane is correctly inserted.
» Tighten the closure of the membrane container.
ROC140:
» Unscrew the two quick fasteners (1) on the left-hand side of
the membrane pressure pipe and catch the leftover water.
» “Remove the two Allen screws (2) and the half-moon shaped
fastening rings (3) from the slot of the membrane pressure tube.
1
2
3
3
4
5
4
» Pull the end cap (4) out of the membrane pressure tube.
» Pull out the membrane (5) from the left side of the
membrane pressure tube.
5
6
» Ensure the correct installation direction and insert
the membrane from the right side into the membrane
pressure tube (6).
» Put the end cap back into the membrane pressure
tube and fasten it with the half-moon shaped fastening
rings (3) and the Allen screws (2).
» Finally, connect both quick fasteners (1).
Notice: Use disposable gloves when installing the
pre-filter(s) and membrane(s) to protect them from
contamination.
» Continue with the commissioning (chapter 8.1) and
flushing of the membrane.