Gorenje REA53IN TT Návod na obsluhu

USERS AND INSTALLATION MANUAL – INDOOR UNIT R32

NAVODILA ZA UPORABO IN NAMESTITEV – NOTRANJA ENOTA R32

UPUTSTVO ZA UPOTREBU I POSTAVLJANJE – UNUTRAŠNJA JEDINICA R32

РЪКОВОДСТВО ЗА УПОТРЕБА И МОНТАЖ - ВЪТРЕШНО ТЯЛО R32

PRÍRUČKA POUŽÍVATEĽOV A INŠTALAČNÁ PRÍRUČKA

- VNÚTORNÁ JEDNOTKA R32

Thank you very much for purchasing this Air Conditioner. Please read this

use and installation instructions carefully before installing and using this

appliance and keep this manual for future reference.

FRANÇAIS

NEDERLANDS

USERS AND INSTALLATION MANUAL – INDOOR UNIT R32

Thank you very much for purchasing this Air Conditioner. Please read this

use and installation instructions carefully before installing and using this

appliance and keep this manual for future reference.

ITALIANO

ESPAÑOL

DEUTSCH

ENGLISH

FRANÇAIS

PORTUGUÊS

NEDERLANDS

РУССКИЙ ЯЗЫК

EN

safety instructions

1

Preparation before use

2

Safety Precautions

3

Identification of parts

12

Indoor unit

12

Outdoor unit

12

Display introduction

13

Maintenance

14

Protection

15

Troubleshooting

16

Installation instructions

17

Installation diagram

17

Select the installation locations

17

Indoor unit installation

18

Caution: Risk of fire/

flammable materials

WARNING: Servicing shall only be performed as recommended by the

equipment manufacturer. Maintenance and repair requiring the assistance of

other skilled personnel shall be carried out under the supervision of the

person competent in the use of flammable refrigerants.

Remote controller operating instructions. See "remote controller

instructions".

Contents

EN

•

To guarantee the unit work normally, please read the manual carefully before installation,

and try to install strictly according to this manual.

•

Do not let air enter the refrigeration system or discharge refrigerant when moving the

air conditioner.

•

Properly ground the air conditioner into the earth.

•

Check the connecting cables and pipes carefully, make sure they are correct and firm

before connecting the power of the air conditioner.

•

There must be an air-break switch.

•

After installing, the consumer must operate the air conditioner correctly according

to this manual, keep a suitable storage for maintenance and moving of the air

conditioner in the future.

•

Fuse of indoor unit: T 3.15A/5A 250VAC.

•

For 2,6kW~3,5kW models, fuse of outdoor unit: T 15A 250VAC

• For 5,3kW models,

fuse of outdoor unit: T 20A 250VAC

•

The installation instructions for appliances that are intended to be permanently

connected to fixed wiring and have a leakage current that may exceed 10 mA,

shall state that the installation of a residual current device (RCD) having a rated

residual operating current not exceeding 30 mA is advisable.

•

Warning: Risk of electric shock can cause injury or death: Disconnect all remote

electric power supplies before servicing.

•

The maximum length of the connecting pipe between the indoor unit and outdoor

unit should be less than 5 meters. It will affect the efficiency of the air conditioner

if the distance longer than that length.

•

This appliance can be used by children aged from 8 years and above and persons

with reduced physical, sensory or mental capabilities or lack of experience and

knowledge if they have been given supervision or instruction concerning use of the

appliance in a safe way and understand the hazards involved. Children shall not

play with the appliance. Cleaning and user maintenance shall not be made by

children without supervision.

•

The batteries in remote controller must be recycled or disposed of properly.

Disposal of Scrap Batteries --- Please discard the batteries as sorted municipal

waste at the accessible collection point.

•

If the appliance is fixed wiring, the appliance must be fitted with means for

disconnection from the supply mains having a contact separation in all poles that

provide full disconnection under over voltage category

111

conditions, and these

means must be incorporated in the fixed wiring in accordance with the wiring rules.

•

If the supply cord is damaged, it must be replaced by the manufacturer, its service

agent or similarly qualified persons to avoid a hazard.

•

The appliance shall be installed in accordance with national wiring regulations.

•

Servicing shall only be performed as recommended by the equipment manufacturer.

Maintenance and repair requiring the assistance of other skilled personnel shall be

carried out under the supervision of the person competent in the use of flammable

refrigerants.

•

The appliance shall not be installed in the laundry.

-1-

2

EN

For the multi system, the refrigerant refers to the multi outdoor unit.

When charging refrigerant into the system, make sure to charge in liquid state, if the

refrigerant of the appliance is R32.Otherwise, chemical composition of refrigerant

(R32) inside the system may change and thus affect performance of the air conditioner.

According to the character of refrigerant (R32, the value of GWP is 675), the

pressure of the tube is very high, so be sure to be careful when you install and repair

the appliance.

If the supply cord is damaged, it must be replaced by the manufacturer, its

service agent or similarly qualified persons to avoid a hazard.

Installation of this product must be done by experienced service technicians’

professional installers only in accordance with this manual.

The temperature of refrigerant circuit will be high, please keep the

interconnection cable away from the copper tube.

Before using the air conditioner, be sure to check and preset the following.

Remote Control presetting

Each time after the remote control is replaced with new batteries or is energized, remote control auto presetting

heat pump. If the air conditioner you purchased is a Cooling Only one, heat pump remote controller can also be used.

Back-light function of Remote Control(optional)

Hold down any button on remote control to activate the back light. It automatically shuts off 10 seconds later.

Note: Back-light is an optional function.

Auto Restart Presetting

The air conditioner has an Auto-Restart function.

This appliance is made of recyclable or re-usable material. Scrapping must be carried out in compliance with local

waste disposal regulations. Before scrapping it, make sure to cut off the mains cord so that the appliance cannot

be re-used.

For more detailed information on handling and recycling this product, contact your local authorities who

deal with the separate collection of rubbish or the shop where you bought the appliance.

SCRAPPING OF APPLIANCE

This appliance is marked according to the European Directive 2012/19/EC,

Waste Electrical and Electronic Equipment (WEEE).

This marking indicates that this product should not be disposed

with other household wastes throughout the EU. To prevent possible harm to

the environment or human health from uncontrolled waste disposal, recycle it

responsibly to promote the sustainable reuse of material resources. To return

your used device, please use the return and collection systems or contact the

retailer where the product was purchased. They can take this product for

environmentally safe recycling.

Preparation before use

Note

Preset

3

EN

Symbols in this Use and Care Manual are interpreted as shown below.

Be sure not to do.

Pay attention to such a situation.

Grounding is essential.

Warning: Incorrect handling could

cause a serious hazard, such as death,

serious injury, etc.

Use correct power supply in

accordance with the rating plate

requirement. Otherwise, serious

faults or hazard may occur, or a

fire maybe break out.

Keep the power supply circuit

breaker or plug from dirt.

Connect the power supply cord

to it firmly and correctly, lest an

electric shock or a fire break out

due to insufficient contact.

Do not use the power supply

circuit breaker or pull off the plug

to turn it off during operation.

This may cause a fire due to

spark, etc.

It is harmful to your health if the cool

air reaches you for a long time. It is

advisable to let the air flow be

deflected to all the room.

Prevent the air flow from reaching

the gas burners and stove.

Do not touch the operation buttons

when your hands are wet.

Never insert a stick or similar obstacle

to the unit. Since the fan rotates at high

speed, this may cause an injury.

Do not repair the appliance by yourself.

If this is done incorrectly, it may cause

an electric shock, etc.

Do not put any objects on the outdoor

unit.

ON

OFF

SMART MOD E

TEMP.

SUPER

FAN S P EED

TEMP.

FEEL SLEE P

It is the user's responsibility to

make the appliance be grounded

according to local codes or

ordinances by a licensed

technician.

CLOCK TI MER ON TI MER O FF

QUI ET D IM MER ECONO M Y

Turn off the appliance by remote control

firstly before cutting off power supply if

malfunction occurs.

ON

OFF

ON

OFF

4

EN

Do not knit, pull or press the

power supply cord, lest the

power supply cord be broken. An

electric shock or fire is probably

caused by a broken power

supply cord.

5

EN

Safety precautions

Precautions for using R32 refrigerant

For the multi system, the refrigerant refers to the multi outdoor unit. The basic installation work procedures

are the same as the conventional refrigerant (R410A). However, pay attention to the following points:

CAUTION

1.

Transport of equipment containing flammable refrigerants

Compliance with the transport regulations

2.

Marking of equipment using signs

Compliance with local regulations

3.

Disposal of equipment using flammable refrigerants

Compliance with national regulations

4.

Storage of equipment/appliances

The storage of equipment should be in accordance with the manufacturer's

instructions.

5.

Storage of packed (unsold) equipment

Storage package protection should be constructed such that mechanical

damage to the equipment inside the package will not cause a leak of the

refrigerant charge.

The maximum number of pieces of equipment permitted to be stored together will

be determined by local regulations.

6.

Information on servicing

6-1 Checks to the area

Prior to beginning work on systems containing flammable refrigerants, safety

checks are necessary to ensure that the risk of ignition is minimized. For repair

to the refrigerating system, the following precautions shall be complied with

prior to conducting work on the system.

6-2 Work procedure

Work shall be undertaken under a controlled procedure to minimize the risk of

flammable gas or vapor being present while the work is being performed.

6-3 General work area

All maintenance staff and others working in the local area shall be instructed on

the nature of work being carried out. Work in confined spaces shall be avoided.

The area around the workspace shall be sectioned off. Ensure that the

conditions within the area have been made safe by control of flammable

material.

6-4 Checking for presence of refrigerant

The area shall be checked with an appropriate refrigerant detector prior to and

during work, to ensure the technician is aware of potentially flammable atmospheres.

Ensure that the leak detection equipment being used is suitable for use with

flammable refrigerants, i.e. non-sparking, adequately sealed or intrinsically

safe.

6

EN

CAUTION

6-5 Presence of fire extinguisher

If any hot work is to be conducted on the refrigeration equipment or any

associated parts, appropriate fire extinguishing equipment shall be available

to hand.

Have a dry powder or CO2 fire extinguisher adjacent to the charging area.

6-6 No ignition sources

No person carrying out work in relation to a refrigeration system which involves

exposing any pipe work that contains or has contained flammable refrigerant shall

use any sources of ignition in such a manner that it may lead to the risk of fire or

explosion.

All possible ignition sources, including cigarette smoking, should be kept

sufficiently far away from the site of installation, repairing, removing and disposal,

during which flammable refrigerant can possibly be released to the surrounding

space.

Prior to work taking place, the area around the equipment is to be surveyed to make

sure that there are no flammable hazards or ignition risks. “No Smoking” signs shall

be displayed.

6-7 Ventilated area

Ensure that the area is in the open or that it is adequately ventilated before

breaking into the system or conducting any hot work.

A degree of ventilation shall continue during the period that the work is carried out.

The ventilation should safely disperse any released refrigerant and preferably

expel it externally into the atmosphere.

6-8 Checks to the refrigeration equipment

Where electrical components are being changed, they shall be fit for the

purpose and to the correct specification.

At all times the manufacturer's maintenance and service guidelines shall be

followed. If in doubt consult the manufacturer's technical department for

assistance.

The following checks shall be applied to installations using flammable

refrigerants:

–

The charge size is in accordance with the room size within which the

refrigerant containing parts are installed;

–

The ventilation machinery and outlets are operating adequately and are not

obstructed;

–

If an indirect refrigerating circuit is being used, the secondary circuit shall be

checked for the presence of refrigerant;

–

Marking to the equipment continues to be visible and legible. Markings and

signs that are illegible shall be corrected;

–

Refrigeration pipe or components are installed in a position where they are

unlikely to be exposed to any substance which may corrode refrigerant

containing components, unless the components are constructed of materials

7

EN

CAUTION

which are inherently resistant to being corroded or are suitably protected

against being so corroded.

6-9 Checks to electrical devices

Repair and maintenance to electrical components shall include initial safety

checks and component inspection procedures.

If a fault exists that could compromise safety, then no electrical supply shall be

connected to the circuit until it is satisfactorily dealt with.

If the fault cannot be corrected immediately but it is necessary to continue

operation, an adequate temporary solution shall be used.

This shall be reported to the owner of the equipment, so all parties are advised. Initial

safety checks shall include:

–

That capacitors are discharged: this shall be done in a safe manner to avoid

possibility of sparking;

–

That there no live electrical components and wiring are exposed while

charging, recovering or purging the system;

–

That there is continuity of earth bonding.

7.

Repairs to sealed components

During repairs to sealed components, all electrical supplies shall be disconnected

from the equipment being worked upon prior to any removal of sealed covers, etc.

If it is necessary to have an electrical supply to equipment during servicing, then a

permanently operating form of leak detection shall be located at the most critical

point to warn of a potentially hazardous situation.

Attention shall be paid to the following to ensure that by working on electrical

components, the casing is not altered in such a way that the level of protection is

affected.

This shall include damage to cables, excessive number of connections, terminals

not made to original specification, damage to seals, incorrect fitting of glands, etc.

Ensure that apparatus is mounted securely.

Ensure that seals or sealing materials have not degraded such that they no longer

serve the purpose of preventing the ingress of flammable atmospheres.

Replacement parts shall be in accordance with the manufacturer's specifications.

NOTE:

The use of silicon sealant may inhibit the effectiveness of some types of

leak detection equipment. Intrinsically safe components do not have to be

isolated prior to working on them.

8.

Repair to intrinsically safe components

Do not apply any permanent inductive or capacitance loads to the circuit without

ensuring that this will not exceed the permissible voltage and current permitted for

the equipment in use.

Intrinsically safe components are the only types that can be worked on while

8

EN

CAUTION

live in the presence of a flammable atmosphere. The test apparatus shall be at the

correct rating.

Replace components only with parts specified by the manufacturer.

Other parts may result in the ignition of refrigerant in the atmosphere from a leak.

9.

Cabling

Check that cabling will not be subject to wear, corrosion, excessive pressure,

vibration, sharp edges or any other adverse environmental effects.

The check shall also consider the effects of aging or continual vibration

from sources such as compressors or fans.

10.

Detection of flammable refrigerants

Under no circumstances shall potential sources of ignition be used in the

searching for or detection of refrigerant leaks.

A halide torch (or any other detector using a naked flame) shall not be used.

11.

Leak detection methods

The following leak detection methods are deemed acceptable for systems

containing flammable refrigerants:

–

Electronic leak detectors shall be used to detect flammable refrigerants, but

the sensitivity may not be adequate, or may need re-calibration. (Detection

equipment shall be calibrated in a refrigerant-free area.)

–

Ensure that the detector is not a potential source of ignition and is suitable

for the refrigerant used.

–

Leak detection equipment shall be set at a percentage of the LFL of the

refrigerant and shall be calibrated to the refrigerant employed and the

appropriate percentage of gas (25 % maximum) is confirmed.

–

Leak detection fluids are suitable for use with most refrigerants but the use

of detergents containing chlorine shall be avoided as the chlorine may react

with the refrigerant and corrode the copper pipe-work.

–

If a leak is suspected, all naked flames shall be removed/ extinguished.

–

If a leakage of refrigerant is found which requires brazing, all of the

refrigerant shall be recovered from the system, or isolated (by means of shut

off valves) in a part of the system remote from the leak.

–

Oxygen free nitrogen (OFN) shall then be purged through the system both

before and during the brazing process.

12.

Removal and evacuation

When breaking into the refrigerant circuit to make repairs – or for any other

purpose – conventional procedures shall be used.

However, it is important that best practice is followed since flammability is a

consideration.

The following procedure shall be adhered to:

–

Remove refrigerant;

–

Purge the circuit with inert gas;

9

EN

CAUTION

–

Evacuate;

–

Purge again with inert gas;

–

Open the circuit by cutting or brazing.

The refrigerant charge shall be recovered into the correct recovery cylinders.

The system shall be “flushed” with OFN to render the unit safe. This

process may need to be repeated several times.

Compressed air or oxygen shall not be used for this task.

Flushing shall be achieved by breaking the vacuum in the system with OFN and

continuing to fill until the working pressure is achieved, then venting to atmosphere,

and finally pulling down to a vacuum.

This process shall be repeated until no refrigerant is within the system. When

the final OFN charge is used, the system shall be vented down to atmospheric

pressure to enable work to take place.

This operation is absolutely vital if brazing operations on the pipe-work are to take

place.

Ensure that the outlet for the vacuum pump is not close to any ignition sources and

there is ventilation available.

13.

Charging procedures

In addition to conventional charging procedures, the following requirements shall

be followed:

–

Ensure that contamination of different refrigerants does not occur when

using charging equipment.

–

Hoses or lines shall be as short as possible to minimize the amount of

refrigerant contained in them.

–

Cylinders shall be kept upright.

–

Ensure that the refrigeration system is earthed prior to charging the system

with refrigerant.

–

Label the system when charging is complete (if not already).

–

Extreme care shall be taken not to overfill the refrigeration system.

Prior to recharging the system, it shall be pressure tested with OFN.

The system shall be leak tested on completion of charging but prior to

commissioning.

A follow up leak test shall be carried out prior to leaving the site.

14.

Decommissioning

Before carrying out this procedure, it is essential that the technician is

completely familiar with the equipment and all its detail.

It is recommended good practice that all refrigerants are recovered safely. Prior to the

task being carried out, an oil and refrigerant sample shall be taken in case analysis is

required prior to re-use of reclaimed refrigerant. It is essential that electrical power is

available before the task is commenced.

a) Become familiar with the equipment and its operation.

b) Isolate system electrically.

10

EN

CAUTION

c) Before attempting the procedure ensure that:

–

Mechanical handling equipment is available, if required, for handling

refrigerant cylinders;

–

All personal protective equipment is available and being used correctly;

–

The recovery process is always supervised by a competent person;

–

Recovery equipment and cylinders conform to the appropriate standards.

d) Pump down refrigerant system, if possible.

e) If a vacuum is not possible, make a manifold so that refrigerant can be

removed from various parts of the system.

f) Make sure that cylinder is situated on the scales before recovery takes

place.

g) Start the recovery machine and operate in accordance with manufacturer's

instructions.

h) Do not overfill cylinders. (No more than 80 % volume liquid charge).

I) Do not exceed the maximum working pressure of the cylinder, even

temporarily.

j) When the cylinders have been filled correctly and the process completed, make

sure that the cylinders and the equipment are removed from site promptly and

all isolation valves on the equipment are closed off.

k) Recovered refrigerant shall not be charged into another refrigeration system

unless it has been cleaned and checked.

15.

Labelling

Equipment shall be labelled stating that it has been de-commissioned and emptied of

refrigerant.

The label shall be dated and signed.

Ensure that there are labels on the equipment stating the equipment contains

flammable refrigerant.

16.

Recovery

When removing refrigerant from a system, either for servicing or

decommissioning, it is recommended good practice that all refrigerants are

removed safely.

When transferring refrigerant into cylinders, ensure that only appropriate

refrigerant recovery cylinders are employed.

Ensure that the correct number of cylinders for holding the total system charge

is available.

All cylinders to be used are designated for the recovered refrigerant and

labelled for that refrigerant (i.e. special cylinders for the recovery of

refrigerant).

Cylinders shall be complete with pressure relief valve and associated shut- off

valves in good working order.

Empty recovery cylinders are evacuated and, if possible, cooled before

recovery occurs.

The recovery equipment shall be in good working order with a set of

11

EN

CAUTION

instructions concerning the equipment that is at hand and shall be suitable for the

recovery of flammable refrigerants.

In addition, a set of calibrated weighing scales shall be available and in good

working order.

Hoses shall be complete with leak-free disconnect couplings and in good

condition.

Before using the recovery machine, check that it is in satisfactory working order, has

been properly maintained and that any associated electrical components are sealed

to prevent ignition in the event of a refrigerant release. Consult manufacturer if in

doubt.

The recovered refrigerant shall be returned to the refrigerant supplier in the

correct recovery cylinder, and the relevant Waste Transfer Note arranged. Do not

mix refrigerants in recovery units and especially not in cylinders.

If compressors or compressor oils are to be removed, ensure that they have

been evacuated to an acceptable level to make certain that flammable

refrigerant does not remain within the lubricant.

The evacuation process shall be carried out prior to returning the compressor to the

suppliers.

Only electric heating to the compressor body shall be employed to accelerate this

process.

When oil is drained from a system, it shall be carried out safely.

CAUTION

When moving or relocating the air conditioner, consult experienced service

technicians for disconnection and reinstallation of the unit.

Do not place any other electrical products or household belongings under indoor unit

or outdoor unit. Condensation dripping from the unit might get them wet and may

cause damage or malfunction of your property.

Do not use means to accelerate the defrosting process or to clean, other than those

recommended by the manufacturer.

The appliance shall be stored in a room without continuously operating ignition sources

(for example, open flames, an operating gas appliance or an operating electric heater).

Do not pierce or burn.

Be aware that refrigerants may not contain an odor.

To keep ventilation openings, clear of obstruction.

The appliance shall be stored in a well-ventilated area where the room size

corresponds to the room area as specified for operation.

The appliance shall be stored in a room without continuously operating open

flames (for example an operating gas appliance) and ignition sources (for example

an operating electric heater).

12

EN

CAUTION

Any person who is involved with working on or breaking into a refrigerant circuit

should hold a current valid certificate from an industry-accredited assessment

authority, which authorizes their competence to handle refrigerants safely in

accordance with an industry recognized assessment specification.

Servicing shall only be performed as recommended by the equipment

manufacturer.

Maintenance and repair requiring the assistance of other skilled personnel shall be

carried out under the supervision of the person competent in the use of flammable

refrigerants.

Do not use means to accelerate the defrosting process or to clean, other than those

recommended by the manufacturer.

Appliance shall be installed, operated and stored in a room with a floor area

larger than 10 m

2

.

The installation of pipe-work shall be kept to a a room with a floor area larger than

10 m

2

.

The pipe-work shall be compliance with national gas regulations. The maximum

refrigerant charge amount is 2.5 kg.

Mechanical connectors used indoors shall comply with ISO 14903. When

mechanical connectors are reused indoors, sealing parts shall be renewed. When

flared joints are reused indoors, the flare part shall be re-fabricated. The

installation of pipe-work shall be kept to a minimum.

Mechanical connections shall be accessible for maintenance purposes.

Explanation of symbols displayed on the indoor unit or outdoor unit.

WARNING

This symbol shows that this appliance uses a flammable

refrigerant.

If the refrigerant is leaked and exposed to an external

ignition source, there is a risk of fire

CAUTION

This symbol shows that the operation manual should be

read carefully.

CAUTION

This symbol shows that a service personnel should be

handling this equipment with reference to the

installation manual.

CAUTION

This symbol shows that information is available such as the

operating manual or installation manual.

13

EN

Identification of parts

Front Panel

Air Intake

Display Panel

Emergency Panel

Air Outlet

Vertical Adjustment

Louver

Horizontal Adjustment

Louver

Air Filter

Remote Controller

Air Intake

Pipes and Power

Connection Cord

Drain Hose

Note: Condensate water drains

at COOLING or DRY operation.

Air Outlet

The figures in this manual are based on the external view of a standard model.

Consequently, the shape may differ from that of the air conditioner you have selected.

Indoor unit

Outdoor unit

The symbols may be different from these models, but the functions are similar.

13

EN

Display introduction

Temperature indicator

Display set temperature.

It shows FC after 200 hours of usage as reminder to clean the filter.

After filter cleaning press the filter reset button located on the indoor unit behind the front

panel to reset the display. (optional)

Running indicator

Run

Timer

Sleep

Comp.

It lights up when the AC is running.

It flashes during defrosting.

Timer indicator

It lights up during set time.

Sleep indicator

It lights up in sleep mode.

Compressor indicator

It lights up when the compressor is on.

Super indicator

It lights up in super mode.

Mode indicator

Heating displays orange,others display white

Fan speed indicator

8

Signal Receptor

Smart WIFI indicator 10

It lights up during WIFI is on.

NANOE indicator

It lights up in NANOE mode.

9

5

4

3

2

VG/VL series

1

11

1

2

3

4

5

6

9

7

The symbols may be different from these models, but the functions are similar.

13

EN

9

4

2

1

5

VT series

3

9

5

4

3

2

1

SF/DG (Right side)

series

9

4

2

1

5

3

SE series

The symbols may be different from these models, but the functions are similar.

13

EN

NS/DE series

NT series

4

2

1

5

3

VQ/TE/TF/DA/DG(Middle)/DH/DL(Right side) series

The symbols may be different from these models, but the functions are similar.

13

EN

VM series

4

5

1

2

4

2

3

5

1

2

4

9

NM/DF series

3

NK series

3

6

TA/TC series

1

TQ/TR series

9

optional

9

2

3

10

3

1

optional

4

9

Stránka sa načítava ...

Gorenje REA53IN TT Návod na obsluhu

Gorenje REA53IN TT Návod na obsluhu

Súvisiace články

Ďalšie dokumenty