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Midea Värmepump MV8M-160WV2RN8

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Original instructions

Thank you very much for purchasing our air conditioner.

Before using your air conditioner, please read this manual carefully and retain it for future reference.

The figures shown in this manual are for reference purposes only and may be slightly different from the actual product.

IMPORTANT NOTE:

INSTALLATION AND

OWNER’S MANUAL

Full DC Inverter V8 R32 Series Mini VRF (ODU)

CONTENTS

OWNER’S MANUAL

740

PRECAUTIONS

PACKING BOX

OUTDOOR UNIT

PREPARATIONS BEFORE INSTALLATION

635

OUTDOOR UNIT INSTALLATION

ELECTRICAL WIRING

216

COMMISSIONING

CONFIGURATION

PRECAUTIONS ON REFRIGERANT LEAKAGE

10 49

TURN OVER TO CUSTOMER

11 50

TECHNICAL DATA

INSTALLATION MANUAL

BEFORE OPERATING

OPERATIONS

MAINTENANCE AND REPAIR

TROUBLESHOOTING

5 CHANGING INSTALLATION SITE

6 DISPOSAL

NOTE

The single-phase units comply with IEC 61000-3-12.

The figures in this manual are for explanation purposes only. They may be slightly different from the air conditioner you

purchased (depending on the model). The actual shape shall prevail.

Refrigerant pipe

connector

Air inlet

Mounting

bracket

Air outlet

OWNER’S MANUAL 1.1 Overview

Read these instructions carefully before

operation. And keep this manual handy for

future reference.

Any person who is involved with working on or

opening 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 credential.

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 a person

competent in the use of flammable refrigerants.

1 BEFORE OPERATING

To prevent injury to the user or others and property

damage, the following instructions must be followed.

Ignoring these instructions may cause harm or damage.

The safety precautions listed here are divided into the

following types. They are quite important, so be sure to

follow them carefully.

Meanings of WARNING, CAUTION NOTE and ,

INFORMATION symbols.

Explanation of symbols displayed on the application

CAUTION

This symbol indicates that the operation manual should be read carefully.

This symbol indicates that service personnel should be handling this equipment

while referencing the installation manual.

This symbol indicates that additional information is available in documents such

as the operating manual or installation manual.

A situation that may lead to severe injury or

death.

A situation that may lead to mild or moderate

injury.

A situation that may cause damage to the

equipment or loss of property.

Indicates a useful hint or additional information.

INFORMATION

WARNING

CAUTION

NOTE

1.2 Important Safety Information

This appliance can be used by children

ages 8 and above and persons with

reduced physical, sensory or mental

capabilities or who lack experience and

knowledge only if they are supervised or

have been given instruction concerning the

use of the appliance in a safe way and

understand the hazards involved.

Children shall not play with the appliance.

Children shall not clean or maintain the

appliance without supervision.

This appliance is not intended for use by

persons (including children) with reduced

physical, sensory or mental capabilities, or

persons who lack experience and

knowledge, unless they are supervised or

have been given instructions concerning

the use of the appliance by a person

responsible for their safety.

– Children should be supervised to ensure that

they do not play with the appliance.

– The split units shall only be connected to an

appliance compatible with the same refrigerant.

– The units 8-18 kW are split unit air

conditioners, complying with split unit

requirements of this International standard,

and must only be connected to the units that

have been confirmed as complying with the

corresponding split unit requirements of this

International standard.

Ask your dealer to assist in the installation

of the air conditioner.

Incomplete installation performed by yourself

may result in a water leakage, electric shock,

and fire.

Ask your dealer for assistance with

improvement, repair, and maintenance.

Incomplete improvement, repair, and

maintenance may result in a water leakage,

electric shock, and fire.

To avoid electric shock, fire or injury,

please turn off the power supply and call

your dealer for instructions if you detect

any abnormalities such as a burning smell

Never let the indoor unit or the remote

controller get wet.

This could lead to electric shock or fire.

Never press the button of the remote

controller with a hard, pointed object.

The remote controller may be damaged.

Never replace a fuse with a fuse that has an

incompatible rated current or other wires

when a fuse blows out.

The use of wire or copper wire may cause the

unit to break down or cause a fire.

Exposing your body to the air flow of the

air conditioner for long periods of time may

be harmful to your health

Do not insert fingers, rods or other objects

into the air inlet or outlet.

When the fan is in operation, it will cause injury.

Never use a flammable spray, such as hair

spray or lacquerer paint, near the unit.

It may cause a fire.

Prior to beginning work on systems

containing flammable refrigerants, safety

checks are necessary to minimize the risk

of ignition

When repairing the refrigerating system,

comply with the following precautions prior

to conducting work on the system:

– shall be undertaken according to controlled

procedures so as to minimize the risk of the

presence of flammable gases or vapors while

the work is being performed.

– 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 shall be checked with an

appropriate refrigerant detector prior to and

during work, to ensure the technician is aware

of potentially toxic or flammable environment.

Ensure that the leak detection equipment

being used is suitable for use with all

applicable refrigerants, i.e. non-sparking,

adequately sealed or intrinsically safe.

– If any hot work is to be conducted on the

refrigerating equipment or any associated

parts, appropriate fire extinguishing equipment

shall be available and easily accessible. Have

a dry powder or CO2 fire extinguisher adjacent

to the charging area.

– When carrying out work in relation to a

refrigerating system that involves exposing any

pipe work, no sources of ignition shall be used

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, repair, or removal and disposal of

the unit, during which refrigerant can possibly

be released into the surrounding space. Prior

to beginning work, 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 clearly

displayed.

Ensure that the area is in the open or that it

is adequately ventilated before opening 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 surroundings.

Where electrical components are being

changed, they shall be fit according to their

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 actual refrigerant charge 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;

– Equipment marking must remain visible and

legible. Markings and signs that are illegible

shall be corrected;

WARNING

– Refrigerating pipe or components are

installed in a position where they are unlikely

to be exposed to any substances which may

corrode refrigerant containing components,

unless the components are constructed of

materials that are inherently resistant to

corrosion or are suitably protected against

corrosion.

Repair and maintenance of 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 the fault has been dealt with

satisfactorily. 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

that all parties are advised. Initial safety

checks shall include:

– That capacitors are discharged: this shall be

done in a safe manner to avoid the possibility

of sparking;

– That no live electrical components and wiring

are exposed while charging, recovering or

purging the system;

– That there is continuity of grounding.

When repairing 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 absolutely necessary to have an

electrical supply to the equipment during

servicing, then a permanently operating

form of leak detection shall be installed at

the most critical point to warn of a

potentially hazardous situation.

Particular 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, an excessive amount of

connections, terminals not made to their

original specification, damage to seals,

incorrect fitting of glands, etc.

Ensure that the apparatus is mounted

securely.

Ensure that seals or sealing materials have

not degraded to the point that they no

longer prevent the ingress of flammable

materials. Replacement parts shall conform

with the manufacturer’s specifications.

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 live in

the presence of flammable gases. 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

which has leaked into the surroundings.

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

take into account the effects of aging or

continual vibration from sources such as

compressors or fans.

Under no circumstances shall potential

sources of ignition be used while searching

for or detection of refrigerant leaks. A halide

torch (or any other detector using a naked

flame) shall not be used.

Electronic leak detectors may be used to

detect refrigerant leaks but, in the case of

flammable refrigerants, 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 for the refrigerant

employed, and the appropriate percentage

of gas (25 % maximum) is confirmed.

If a leak is suspected, all naked flames shall

be removed/extinguished.

If a leakage of refrigerant which requires

brazing is found, 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.

When opening the refrigerant circuit to

make repairs – or for any other purpose –

conventional procedures shall be used.

However, for flammable refrigerants it is

important that best practice is followed

since flammability is a consideration. The

following procedure shall be followed:

– Remove refrigerant;

– Purge the circuit with inert gas;

– Evacuate;

– Purge 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. Do not use

compressed air or oxygen for this task.

Flushing shall be achieved by breaking the

vacuum in the system with OFN and

continuing to fill until a working pressure is

achieved, then venting to the surroundings,

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

pipework are to take place.

Ensure that the outlet for the vacuum pump

is not close to any ignition sources and

there is ventilation available.

When removing refrigerant from a system,

either for servicing or decommissioning, it

is recommended that all refrigerants are

removed safely.

When transferring refrigerant into cylinders,

ensure that only appropriate refrigerant

recovery cylinders are used. 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 labeled for that

refrigerant (i.e. special cylinders for the

recovery of refrigerant). Cylinders shall be

complete, with pressure-relief valves and

associated shut-off valves in good working

order. Empty recovery cylinders are

evacuated and, if possible, cooled before

recovery occurs.

Recovery equipment shall be in good

working order and have an easily accessible

set of instructions concerning the

equipment . and the equipment shall be

suitable for the recovery of all appropriate

refrigerants including, when applicable,

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 the manufacturer if assistance is

required.

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 will 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.

Electric heating will only be employed on

the compressor body to accelerate this

process. When oil is drained from a system,

it shall be carried out safely.

The maximum operating pressure of the

aplication is 43 bar, which must be

considered when connecting to any

condenser unit or evaporator unit.

The application shall only be connected to

an appliance suitable for the same

refrigerant.

The units (8-18kW) are partial unit air

conditioners, complying with partial unit

requirements of this International Standard,

and must only be connected to other units

that have been confirmed as complying to

corresponding partial unit requirements of

this International Standard.

Ensure that contamination of different

refrigerants does not occur when using

charging equipment. Hoses or lines shall be

as short as possible to minimise the amount

of refrigerant they contain.

Cylinders shall be kept upright.

Ensure that the refrigeration system is

grounded prior to charging the system with

refrigerant.

Label the system when charging is

complete (if it is not already labeled).

Take extreme care 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.

Before carrying out this procedure, it is

essential that the technician is completely

familiar with the equipment and all its detail.

It is recommended 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.

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 supervised at all

times 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 the cylinder is situated on the

scales before recovery takes place.

g) Start the recovery machine and operate it in

accordance with the 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 has been 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.

Equipment shall be labeled 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.

WARNING

Do not use the air conditioner for other

purposes.

In order to avoid any quality deterioration, do

not use the unit for the cooling of precision

instruments, food, plants, animals or works of

art.

Before cleaning, be sure to stop the

operation, turn the breaker off or unplug the

supply cord.

Otherwise, electric shock and injury may occur.

In order to avoid electric shock or fire,

make sure that an earth leak detector is

installed.

Be sure the air conditioner is grounded.

In order to avoid electric shock, make sure that

the unit is grounded and that the earth wire is

not connected to a gas or water pipe, lightning

conductor or telephone earth wire.

In order to avoid injury, do not remove the

fan guard of the outdoor unit.

Do not operate the air conditioner with a wet

hands.

An electric shock may happen.

Do not touch the heat exchanger fins. These

fins are sharp and could cut you.

Do not place items which might be damaged

by moisture under the indoor unit.

Condensation may form if the humidity is above

80%, the drain outlet is blocked or the filter is

polluted.

After extended use, inspect the unit stand

and fitting for damage.

If damaged, the unit may fall and cause injury.

To avoid oxygen deficiency, ventilate the

room sufficiently if equipment with a burner

is used together with the air conditioner.

Arrange the drain hose to ensure smooth

drainage.

Incomplete drainage may cause wetting of the

building, furniture, etc.

Never touch the internal parts of the

controller.

Do not remove the front panel. Some parts

inside are dangerous to touch, and machine

troubles may occur.

Never expose little children, plants or

animals directly to the air flow.

Adverse influence to little children, animals and

plants may occur.

Do not allow a child to climb on the outdoor

unit and avoid placing any objects on it.

Injury may occur due to falling or tumbling.

Do not operate the air conditioner when

using a room fumigation - type insecticide.

Failure to observe this precaution could cause

the chemicals to become deposited in the unit,

which could endanger the health of those who

are hypersensitive to chemicals.

Do not place appliances which produce

open flame in places exposed to the air flow

from the unit or under the indoor unit.

It may cause incomplete combustion or

deformation of the unit due to the heat.

Never touch the air outlet or the horizontal

blades while the swing flap is in operation.

Your fingers may become caught or the unit

may break down.

Never put any objects into the air inlet or

outlet.

Objects touching the fan at high speed can be

dangerous.

Never inspect or service the unit by

yourself.

Ask a qualified service person to perform this

task.

If electrical appliances are disposed of in

landfills or dumps, hazardous substances

can leak into the groundwater and get into

the food chain, harming your health and

well-being.

To prevent refrigerant leak, contact your

dealer.

When the system is installed and operates in a

small room, it is required to maintain the

concentration of the refrigerant below the limit,

in case a leak occurs. Otherwise, oxygen in the

room may be affected, resulting in a serious

accident.

The refrigerant in the air conditioner is safe

and normally does not leak.

If the refrigerant leaks into the room and comes

into contact with the fire of a burner, a heater or

a cooker, a harmful gas could be released.

Turn off any combustible heating devices,

ventilate the room, and contact the dealer

where you purchased the unit.

Do not use the air conditioner until a service

person confirms that the refrigerant leak is

repaired.

Keep ventilation openings clear of

obstruction.

Do not dispose of this product as unsorted

municipal waste. This waste should be

collected separately for special treatment.

Do not dispose of electrical appliances as

unsorted municipal waste. Use

separate collection facilities.

Contact your local government

for information regarding the

connection systems available

WARNING

CAUTION CAUTION

The space considered shall be any space

which contains refrigerant-containing parts or

into which refrigerant could be released.

The room area (A) of the smallest, enclosed,

occupied space shall be used in the

determination of the refrigerant quantity limits.

The maximum refrigerant charge is related to

types of the indoor units, which have different

installation heights

The lowest maximum allowable charge of all

rooms shall be used.

1.3.1.4 Refrigerant charge and room area

limitations (strategy 2)

The system also has a maximum design

refrigerant charge limit of 12 kg, which cannot

be exceeded under any circumstances.

The maximum refrigerant limit described above

applies to unventilated areas. For adding

additional measures, such as areas with

mechanical ventilation, please refer to

applicable legislation for the maximum

refrigerant limit.

Determine the charge limit for the refrigerating system

as the smaller of:

1) The maximum refrigerant charge (Mmax) in the

system from

the above room area limitations

2) The maximum refrigerant charge (Mmax) with

additional measures, such as areas with mechanical

ventilation.

3) 12 kg from the limit of the application.

Table 1-1

In IEC 60335-2-40, R32 refrigerant is classified as

class A2L, which is mildly flammable. And the system

meets the requirements of enhanced tightness

refrigerating systems. Therefore, R32 refrigerant is

suitable for systems needing additional refrigerant

charge and which will limit room area strategy.

Similarly, the total amount of refrigerant in the system

shall be less than or equal to the maximum refrigerant

charge. The maximum refrigerant charge depends on

the space of the rooms being served by the system.

As shown above:

1) Curve a) is refrigerant charge limitation for the indoor (

unit installation height between 1.8 m and 2.2 m.

2) Curve b) is refrigerant charge limitation for the indoor (

unit installation height not less than 2.2 m.

4 2.048/2.503 23 4.911/6.003 42 6.637/7.956

5 2.29/2.798 24 5.017/6.132 43 6.715/7.956

6 2.508/3.066 25 5.12/6.258 44 6.793/7.956

7 2.709/3.311 26 5.222/6.382 45 6.87/7.956

8 2.896/3.54 27 5.321/6.504 46 6.946/7.956

9 3.072/3.755 28 5.419/6.623 47 7.021/7.956

10 3.238/3.958 29 5.515/6.74 48 7.095/7.956

11 3.396/4.151 30 5.609/6.856 49 7.169/7.956

12 3.547/4.336 31 5.702/6.969 50 7.241/7.956

13 3.692/4.513 32 5.793/7.08 51 7.313/7.956

14 3.832/4.683 33 5.883/7.19 52 7.385/7.956

15 3.966/4.847 34 5.971/7.298 53 7.455/7.956

16 4.096/5.006 35 6.058/7.405 54 7.525/7.956

17 4.222/5.161 36 6.144/7.51 55 7.595/7.956

18 4.345/5.31 37 6.229/7.614 56 7.664/7.956

19 4.464/5.456 38 6.313/7.716 57 7.732/7.956

20 4.58/5.597 39 6.395/7.817 58 7.799/7.956

21 4.693/5.736 40 6.477/7.916 59 7.866/7.956

22 4.803/5.871 41 6.557/7.956 60 7.933/7.956

≥ 61 7.956/7.956

Amin/m2Mmax/kg--(a)/(b) Amin/m2Mmax/kg--(a)/(b) Amin/m2Mmax/kg--(a)/(b)

(a): The IDU installation height between 1.8 m and 2.2 m

(b): The IDU installation height not less than 2.2 m

NOTE

CAUTION

0.00

2.00

4.00

6.00

8.00

10.00

12.00

5 10 15 20 25 30 35 40

(b)

(a)

(d)

(c)

Figure 1-4

For 8-10 kW

Only the factory refrigerant shut-off device can be

used.

The refrigerant shut-off device shall be located

outside.

The refrigerant shut-off device shall only be

installed on the main pipe and is close to the first

branch joint.

The refrigerant shut-off device is not allowed for

series or parallel connections.

The refrigerant shut-off device shall be positioned

to enable access for maintenance by an

authorized person.

Condition B. With additional measure

If the system is equipped with a factory refrigerant

shut-off device on the outdoor unit main pipe and an

alarm device connected to the indoor unit, further rules

regarding refrigerant charge and room area can be

followed. Figure 1-4 and Table 1-4 is suitable for 8-10

kW and Figure 1-5 and Table 1-5 is suitable for

12-18kW.

The alarm device shall be turned on by the

signal from the refrigerant leakage sensor.

The alarm device shall also alert an authorized

person to take appropriate action.

The alarm device shall provide both audible

and visual warnings, such as by a loud (15 dBA

above the background noise level) buzzer and

a flashing light.

At least one alarm device shall be installed

inside each occupied space. For the occupancy

listed below, the alarm system shall also warn

at a supervised location, such as the night

porter’s location, as well as the occupied

space.

Rooms, parts of buildings, buildings where

• sleeping facilities are provided,

• people are restricted in their movement,

• an uncontrolled number of people are

present, or

• to which any person has access without

being personally acquainted with the

necessary safety precautions.

In cases where the alarm device is installed,

the power source of the alarm system shall be

from a power source independent of the

refrigerating systems which the alarm system is

protecting.

(a) Installation height 1 (on the lowest underground floor & A<14 m2)

(b) Installation height 2 (on the lowest underground floor & A<14 m

(d) Not in lowest underground floor

Maximum refrigerant charge (Mmax/kg)

Minimum room area (Amin/m2)

NOTE

1) Curve (a) is the refrigerant charge limitation for the

indoor unit installation height between 1.8 m and

2.2 m while A is < 14 m

2 on the lowest underground

floor.

2) Curve (b) is the refrigerant charge limitation for the

indoor unit installation height not less than 2.2 m

while A is < 14 m

2 on the lowest underground floor.

3) Curve (c) is the refrigerant charge limitation for the

smallest room on the lowest underground floor

while A is ≥ 14 m2.

4) Curve (d) is the refrigerant charge limitation for the

smallest room not on the lowest underground floor.

0.00

2.00

4.00

6.00

8.00

10.00

12.00

5 10 15 20 25 30 35 40

(b)

(a)

(d)

(c)

Figure 1-5

For 12-18 kW (Single-phase & three-phase)

For 8-10 kW Table 1-4

(a) Installation height 1 (on the lowest underground floor & A<14 m

(b) Installation height 2 (on the lowest underground floor & A<14 m

(d) Not on the lowest underground floor

Maximum refrigerant charge (Mmax/kg)

Minimum room area (Amin/m

Amin/m2Mmax/kg--(a)/(b)/(c)/(d) Mmax/kg--(a)/(b)/(c)/(d) Mmax/kg--(a)/(b)/(c)/(d)

Amin/m2Amin/m2

(a): The IDU installation height is between 1.8 m and 2.2 m while A is <14 m

2 and on the lowest underground floor

(b): The IDU installation height is not less than 2.2 m while A is <14 m

2 and on the lowest underground floor

(c): The refrigerant charge limitation is on the lowest underground floor while A is ≥14 m

(d): The refrigerant charge limitation is not on the lowest underground floor.

4 15 26

5 16 27

6 17 28

7 18 29

8 19 30

9 20 31

10 21 32

11 22 33

12 23 34

13 24 35

≥ 3614 25

1.657/2.026/-/3.15 -/-/5.065/6.865 -/-/8.78/10.58

2.072/2.532/-/3.488 -/-/5.403/7.203 -/-/9.117/10.917

2.486/3.039/-/3.826 -/-/5.74/7.54 -/-/9.455/11.255

2.72/3.325/-/4.163 -/-/6.078/7.878 -/-/9.793/11.593

2.908/3.554/-/4.501 -/-/6.416/8.216 -/-/10.131/11.931

3.085/3.77/-/4.839 -/-/6.754/8.554 -/-/10.468/12

3.377/3.974/-/5.177 -/-/7.091/8.891 -/-/10.806/12

3.714/4.168/-/5.514 -/-/7.429/9.229 -/-/11.144/12

4.052/4.353/-/5.852 -/-/7.767/9.567 -/-/11.481/12

4.39/4.531/-/6.19 -/-/8.104/9.904 -/-/11.819/12

-/-/12/12

-/-/4.727/6.527 -/-/8.442/10.242

The application also has a maximum design

refrigerant charge limit of 12 kg, which cannot be

exceeded in any circumstances.

If the system applies to case (d) in Figure 1-4

and Table 1-4 or Figure 1-5 and Table 1-5, the

minimum room area for a 8-10 kW outdoor unit

must not be less than 7 m2 and the minimum

room area for a 12-18 kW outdoor unit must not

be less than 10 m2.

The maximum refrigerant limit described above

applies to unventilated areas. If adding

additional measures, such as areas with

mechanical ventilation, please refer to applicable

legislation for the maximum refrigerant limit.

The maximum

refrigerant

charge has to be

assessed for the room with the smallest room

area in both the lowest underground floor and

the other floors.

And in the lowest underground floor,

the

maximum refrigerant charge is also related to

types of the indoor units, which have different

installation heights.

The lowest maximum allowable charge of all

shall be used.

If the unit is connected via an air duct system to

multiple rooms, the applicable maximum

refrigerant limits are different. Please contact

your installer or dealer for further information

and professional advice.

Determine the charge limit for the refrigerating system

as the smaller of:

1) The maximum refrigerant charge (Mmax) in the

system from

the above room area limitations

2) The maximum refrigerant charge (Mmax) with air

duct system or

additional measures, such as areas with

mechanical ventilation.

3) 12 kg from the limit of the application.

The refrigerant leakage sensor can only use the

factory model or the specified model indicated

in the corresponding manual.

The R32 refrigerant leakage sensor must be

used to activate the refrigerant shut-off device,

the alarm device, incorporated circulation airflow

or other emergency controls, which shall give an

electrical signal at a predetermined alarm set

point in response to leaked refrigerant.

The location of leakage sensors shall be chosen

in relation to the refrigerant and they shall be

located where leaked refrigerant will

concentrate. Please refer to the indoor unit

installation manual for specific requirements.

The installation of the refrigerant leakage sensor

shall allow access for checking, repair or

replacement by an authorized person.

The refrigerant leakage sensor shall be installed

so its function can be verified easily.

The refrigerant leakage sensor shall be

protected to prevent tampering or unauthorized

resetting of the pre-set value.

To be effective, the refrigerant leakage sensor

must be electrically powered at all times after

installation, other than when servicing.

For 12-18 kW (Single-phase & three-phase) Table1-5

Amin/m2Mmax/kg--(a)/(b)/(c)/(d) Mmax/kg--(a)/(b)/(c)/(d) Mmax/kg--(a)/(b)/(c)/(d)

Amin/m2Amin/m2

(a): The IDU installation height is between 1.8 m and 2.2 m while A is <14m

2 and on the lowest underground floor

(b): The IDU installation height is not less than 2.2 m while A is <14m

2 and on the lowest underground floor

(c): The refrigerant charge limitation is on the lowest underground floor while A is ≥14m

(d): The refrigerant charge limitation is not on the lowest underground floor.

4 15 26

5 16 27

6 17 28

7 18 29

8 19 30

9 20 31

10 21 32

11 22 33

12 23 34

13 24 35

14 25

2.657/2.026/-/4.15 -/-/5.065/7.865 -/-/8.78/11.58

2.072/2.532/-/4.488 -/-/5.403/8.203 -/-/9.117/11.917

2.486/3.039/-/4.826 -/-/5.74/8.54 -/-/9.455/12

2.72/3.325/-/5.163 -/-/6.078/8.878 -/-/9.793/12

2.908/3.554/-/5.501 -/-/6.416/9.216 -/-/10.131/12

3.085/3.77/-/5.839 -/-/6.754/9.554 -/-/10.468/12

3.377/3.974/-/6.177 -/-/7.091/9.891 -/-/10.806/12

3.714/4.168/-/6.514 -/-/7.429/10.229 -/-/11.144/12

4.052/4.353/-/6.852 -/-/7.767/10.567 -/-/11.481/12

4.39/4.531/-/7.19 -/-/8.104/10.904 -/-/11.819/12

≥36 -/-/12/12-/-/4.727/7.527 -/-/8.442/11.242

NOTE

CAUTION

Installation scheme flow chart

Determine the room size

and the refrigerant

system configuration

Determine the strategy of the

refrigerant charge and room area

limitations following section 1.3.1

Decrease piping

length by changing

layout.

Yes

Check if the area of the

smallest room meets

the requirements

Calculate the total refrigerant

charging amount (Mc) according to

section 5.8.1

Check the corresponding table to

get the maximum refrigerant

charge (Mmax)

Yes

1.Select the Indoor unit with

a larger airflow rate.

2.Decrease piping length by

changing layout.

3.Increase the smallest

room area.

4.Change the strategy as

described in section 1.3.1.

5. Add additional measures

as described in applicable

legislation.

≤12 kg?

≤Mmax

NOTE

2. OPERATIONS

Use the system in the following temperatures to

ensure safe and effective operation. The Operating

range for the air conditioner is shown in Table 2-1.

Table 2-1

2 Operating Range.1

Cooling

Heating

Dehumidification

Outdoor temperature /DB

Indoor temperature /DB

Indoor temperature /WB

Outdoor temperature /DB

Indoor temperature /DB

Outdoor temperature /WB

Model

-15 °C to 52 °C

8/10/12/14/16/18 kW

16 °C to 30 °C

13 °C to 23 °C

Outdoor temperature /DB

Indoor temperature /DB

Indoor temperature /WB

-15 °C to 52 °C

12 °C to 30 °C

9 °C to 23 °C

-20 °C to 30 °C

-20 °C to 16.5 °C

16 °C to 30 °C

2.2 Operation and Performance

2.2.1 Operating System

Run

2.2.2 Cooling and heating operations

The indoor units in the air conditioner can be controlled

separately, but the indoor units in the same system

cannot operate in the heating and cooling modes at the

same time.

When the cooling and heating operation conflict with

each other, the indoor units which are running in cooling

or fan mode will stop and will display the message

standby or no priority on the control panel. Those indoor

units which are running on heating mode will run

continuously.

If the air conditioner administrator has set the running

mode, then the air conditioner cannot run in any mode

other than the mode presented. Standby or no priority

will be displayed on the control panel.

Press the "switch" button on the controller.

Result: The running light turns on and the system starts

to run.

Stop

Press the "switch" button on the controller again.

Result: The running light is now off, and the system

stops running.

Adjust

Refer to the controller user manual for information about

how to set the required temperature, fan speed and air

flow direction.

Repeatedly press the mode selector on the controller to

select the required operation mode.

If the above operating conditions cannot be

met, the safety protection function may be

triggered and the air conditioner may

malfunction.

When the unit operates in "cooling" mode in a

relatively humid environment (relative

humidity higher than 80%), condensation

may occur on the surface of the IDU and

water may drip. In this case, turn the wind

deflector to the maximum air outlet position

and set the fan speed to "High".

Outdoor operating temperature under -5

°C

"cooling" mode, the startup capacity of IDUs

must meet at least 30% of ODU capacity.

NOTE

To protect this unit, please turn on the main

power supply 12 hours before you start to

operate this unit.

Once the unit has stopped running, do not

disconnect the power immediately. Wait for at

least 10 minutes.

2.2.3 Features of heating operation

While heating, as the outdoor temperature decreases,

frost may form on the heat exchanger in the outdoor

unit, making it more difficult for the heat exchanger to

heat up the air. The heating capacity will decrease, and

the system will need to be defrosted in order to provide

sufficient heat to the indoor unit. At this point, the control

panel of the indoor unit will show that a defrost

operation is occurring.

Once the unit starts, it takes some time for the room

temperature to rise, as the unit uses a hot air circulation

system to heat the room.

The indoor fan motor will automatically stop running so

as to prevent cold air from coming out of the indoor unit

when the heating operation starts. This process will take

some time, which depends on the indoor and outdoor

temperature. This is not a malfunction.

When there is a drop in the external temperature, the

heating capacity decreases. If this happens, please use

other heating equipment and units at the same time.

(Make sure the room is well ventilated if you are using

equipment that produces fire.) Do not place any

equipment that may produce a fire where the air outlets

of the unit are or below the unit itself.

And need to perform the following operations to prevent

the heating capacity from dropping or prevent cold air

from coming out of the system.

About heating capacity

Defrost operation

Produktspecifikationer

Varumärke:	Midea
Kategori:	Värmepump
Modell:	MV8M-160WV2RN8

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