Daikin CVXM20A2V1B, FVXM25A2V1B, FVXM35A2V1B, FVXM50A2V1B Installer reference guide

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Installer reference guide

Split system air conditioners

CVXM20A2V1B FVXM25A2V1B

FVXM35A2V1B FVXM50A2V1B

Table of contents

1 About the documentation 4

1.1 About this document ...................................................................................................................................................... 4

2 General safety precautions 5

2.1 About the documentation .............................................................................................................................................. 5

2.1.1 Meaning of warnings and symbols ................................................................................................................ 5

2.2 For the installer............................................................................................................................................................... 6

2.2.1 General ........................................................................................................................................................... 6

2.2.2 Installation site ............................................................................................................................................... 7

2.2.3 Refrigerant — in case of R410A or R32.......................................................................................................... 11

2.2.4 Brine................................................................................................................................................................ 12

2.2.5 Water .............................................................................................................................................................. 13

2.2.6 Electrical ......................................................................................................................................................... 13

3 Specific installer safety instructions 16

4 About the box 18

4.1 Indoor unit ...................................................................................................................................................................... 18

4.1.1 To unpack the indoor unit .............................................................................................................................. 18

4.1.2 To remove the accessories from the indoor unit .......................................................................................... 18

5 About the unit 20

5.1 System layout.................................................................................................................................................................. 20

5.2 Operation range.............................................................................................................................................................. 20

5.3 About the wireless LAN................................................................................................................................................... 21

5.3.1 Precautions when using the wireless LAN ..................................................................................................... 21

5.3.2 Basic parameters ............................................................................................................................................ 21

5.3.3 Setting the wireless LAN................................................................................................................................. 21

6 Unit installation 23

6.1 Preparing the installation site......................................................................................................................................... 23

6.1.1 Installation site requirements of the indoor unit .......................................................................................... 23

6.2 Opening the indoor unit ................................................................................................................................................. 25

6.2.1 To remove the front panel ............................................................................................................................. 25

6.2.2 To remove the front grille .............................................................................................................................. 25

6.2.3 To open the terminal block and remove the electrical wiring box cover ..................................................... 25

6.3 Mounting the indoor unit ............................................................................................................................................... 26

6.3.1 To install the indoor unit ................................................................................................................................ 26

6.3.2 To drill a wall hole........................................................................................................................................... 31

6.3.3 To remove the slit portions ............................................................................................................................ 31

6.3.4 To provide drainage........................................................................................................................................ 32

6.4 Mounting the user interface........................................................................................................................................... 34

6.4.1 To mount the user interface holder............................................................................................................... 34

7 Piping installation 35

7.1 Preparing refrigerant piping ........................................................................................................................................... 35

7.1.1 Refrigerant piping requirements.................................................................................................................... 35

7.1.2 Refrigerant piping insulation .......................................................................................................................... 36

7.2 Connecting the refrigerant piping .................................................................................................................................. 36

7.2.1 About connecting the refrigerant piping ....................................................................................................... 36

7.2.2 Precautions when connecting the refrigerant piping .................................................................................... 36

7.2.3 Guidelines when connecting the refrigerant piping ...................................................................................... 37

7.2.4 Pipe bending guidelines ................................................................................................................................. 38

7.2.5 To flare the pipe end ...................................................................................................................................... 38

7.2.6 To connect the refrigerant piping to the indoor unit .................................................................................... 39

8 Electrical installation 40

8.1 About connecting the electrical wiring .......................................................................................................................... 40

8.1.1 Precautions when connecting the electrical wiring....................................................................................... 40

8.1.2 Guidelines when connecting the electrical wiring......................................................................................... 41

8.1.3 Specifications of standard wiring components.............................................................................................. 42

8.2 To connect the electrical wiring to the indoor unit ....................................................................................................... 42

8.3 To connect optional accessories (wired user interface, central user interface, wireless adapter, etc.) ...................... 43

Installer reference guide

9 Finishing the indoor unit installation 45

9.1 To finish the indoor unit installation .............................................................................................................................. 45

9.2 To close the indoor unit.................................................................................................................................................. 45

CVXM20+FVXM25~50A2V1B

Split system air conditioners

4P625991-1A – 2020.09

Table of contents

9.2.1 To close the electrical wiring box and close the terminal block.................................................................... 45

9.2.2 To re-install the front grille ............................................................................................................................ 45

9.2.3 To re-install the front panel ........................................................................................................................... 45

10 Configuration 47

10.1 To set a different address ............................................................................................................................................... 47

11 Commissioning 49

11.1 Overview: Commissioning .............................................................................................................................................. 49

11.2 Checklist before commissioning ..................................................................................................................................... 49

11.3 To perform a test run...................................................................................................................................................... 50

11.3.1 To perform a test run using the user interface ............................................................................................. 50

12 Hand-over to the user 51

13 Disposal 52

14 Technical data 53

14.1 Wiring diagram................................................................................................................................................................ 53

14.1.1 Unified wiring diagram legend....................................................................................................................... 53

15 Glossary 56

CVXM20+FVXM25~50A2V1B Split system air conditioners 4P625991-1A – 2020.09

Installer reference guide

1 | About the documentation

1 About the documentation

1.1 About this document

Target audience

Authorised installers

INFORMATION

Make sure that the user has the printed documentation and ask him/her to keep it for future reference.

INFORMATION

This appliance is intended to be used by expert or trained users in shops, in light industry, and on farms, or for commercial and household use by lay persons.

WARNING

Make sure installation, servicing, maintenance, repair and applied materials follow the instructions from Daikin and, in addition, comply with applicable legislation and are performed by qualified persons only. In Europe and areas where IEC standards apply, EN/IEC 60335-2-40 is the applicable standard.

Documentation set

This document is part of a documentation set. The complete set consists of:

▪ General safety precautions:

- Safety instructions that you MUST read before installing

- Format: Paper (in the box of the indoor unit)

▪ Indoor unit installation manual:

- Installation instructions

- Format: Paper (in the box of the indoor unit)

▪ Installer reference guide:

- Preparation of the installation, good practices, reference data,…

- Format: Digital files on http://www.daikineurope.com/support-and-manuals/

product-information/

Latest revisions of the supplied documentation may be available on the regional Daikin website or via your dealer.

The original documentation is written in English. All other languages are translations.

Technical engineering data

▪ A subset of the latest technical data is available on the regional Daikin website

(publicly accessible).

Installer reference guide

▪ The full set of latest technical data is available on the Daikin Business Portal

(authentication required).

CVXM20+FVXM25~50A2V1B

Split system air conditioners

4P625991-1A – 2020.09

2 General safety precautions

2.1 About the documentation

▪ The original documentation is written in English. All other languages are

translations.

▪ The precautions described in this document cover very important topics, follow

them carefully.

▪ The installation of the system, and all activities described in the installation

manual and in the installer reference guide MUST be performed by an authorised installer.

2.1.1 Meaning of warnings and symbols

DANGER

Indicates a situation that results in death or serious injury.

2 | General safety precautions

DANGER: RISK OF ELECTROCUTION

Indicates a situation that could result in electrocution.

DANGER: RISK OF BURNING/SCALDING

Indicates a situation that could result in burning/scalding because of extreme hot or cold temperatures.

DANGER: RISK OF EXPLOSION

Indicates a situation that could result in explosion.

WARNING

Indicates a situation that could result in death or serious injury.

WARNING: FLAMMABLE MATERIAL

CAUTION

Indicates a situation that could result in minor or moderate injury.

CVXM20+FVXM25~50A2V1B Split system air conditioners 4P625991-1A – 2020.09

NOTICE

Indicates a situation that could result in equipment or property damage.

INFORMATION

Indicates useful tips or additional information.

Symbols used on the unit:

Installer reference guide

2 | General safety precautions

Symbols used in the documentation:

Symbol Explanation

Before installation, read the installation and operation manual, and the wiring instruction sheet.

Before performing maintenance and service tasks, read the service manual.

For more information, see the installer and user reference guide.

The unit contains rotating parts. Be careful when servicing or inspecting the unit.

Symbol Explanation

Indicates a figure title or a reference to it.

Example: " 1–3 Figure title" means "Figure 3 in chapter 1".

Indicates a table title or a reference to it.

Example: " 1–3 Table title" means "Table 3 in chapter 1".

2.2 For the installer

2.2.1 General

If you are NOT sure how to install or operate the unit, contact your dealer.

DANGER: RISK OF BURNING/SCALDING

▪ Do NOT touch the refrigerant piping, water piping or internal parts during and

immediately after operation. It could be too hot or too cold. Give it time to return to normal temperature. If you must touch it, wear protective gloves.

▪ Do NOT touch any accidental leaking refrigerant.

WARNING

Improper installation or attachment of equipment or accessories could result in electrical shock, short-circuit, leaks, fire or other damage to the equipment. Only use accessories, optional equipment and spare parts made or approved by Daikin.

WARNING

Make sure installation, testing and applied materials comply with applicable legislation (on top of the instructions described in the Daikin documentation).

Installer reference guide

CAUTION

Wear adequate personal protective equipment (protective gloves, safety glasses,…) when installing, maintaining or servicing the system.

WARNING

Tear apart and throw away plastic packaging bags so that nobody, especially children, can play with them. Possible risk: suffocation.

CVXM20+FVXM25~50A2V1B

Split system air conditioners

4P625991-1A – 2020.09

2 | General safety precautions

WARNING

Provide adequate measures to prevent that the unit can be used as a shelter by small animals. Small animals that make contact with electrical parts can cause malfunctions, smoke or fire.

CAUTION

Do NOT touch the air inlet or aluminium fins of the unit.

CAUTION

▪ Do NOT place any objects or equipment on top of the unit. ▪ Do NOT sit, climb or stand on the unit.

NOTICE

Works executed on the outdoor unit are best done under dry weather conditions to avoid water ingress.

In accordance with the applicable legislation, it might be necessary to provide a logbook with the product containing at least: information on maintenance, repair work, results of tests, stand-by periods,…

2.2.2 Installation site

Also, at least, following information MUST be provided at an accessible place at the product:

▪ Instructions for shutting down the system in case of an emergency

▪ Name and address of fire department, police and hospital

▪ Name, address and day and night telephone numbers for obtaining service

In Europe, EN378 provides the necessary guidance for this logbook.

▪ Provide sufficient space around the unit for servicing and air circulation.

▪ Make sure the installation site withstands the weight and vibration of the unit.

▪ Make sure the area is well ventilated. Do NOT block any ventilation openings.

▪ Make sure the unit is level.

Do NOT install the unit in the following places:

▪ In potentially explosive atmospheres.

▪ In places where there is machinery that emits electromagnetic waves.

Electromagnetic waves may disturb the control system, and cause malfunction of the equipment.

▪ In places where there is a risk of fire due to the leakage of flammable gases

(example: thinner or gasoline), carbon fibre, ignitable dust.

Instructions for equipment using R32 refrigerant

CVXM20+FVXM25~50A2V1B Split system air conditioners 4P625991-1A – 2020.09

▪ In places where corrosive gas (example: sulphurous acid gas) is produced.

Corrosion of copper pipes or soldered parts may cause the refrigerant to leak.

▪ In bathrooms.

WARNING: MILDLY FLAMMABLE MATERIAL

The refrigerant inside this unit is mildly flammable.

Installer reference guide

2 | General safety precautions

WARNING

▪ Do NOT pierce or burn. ▪ Do NOT use means to accelerate the defrosting process or to clean the

equipment, other than those recommended by the manufacturer.

▪ Be aware that R32 refrigerant does NOT contain an odour.

WARNING

The appliance shall be stored so as to prevent mechanical damage and in a wellventilated room without continuously operating ignition sources (example: open flames, an operating gas appliance or an operating electric heater) and have a room size as specified below.

WARNING

Make sure installation, servicing, maintenance and repair comply with instructions from Daikin and with applicable legislation (for example national gas regulation) and are executed only by authorised persons.

WARNING

If one or more rooms are connected to the unit using a duct system, make sure:

▪ there are no operating ignition sources (example: open flames, an operating gas

appliance or an operating electric heater) in case the floor area is less than the minimum floor area A (m²).

▪ no auxiliary devices, which may be a potential ignition source, are installed in the

duct work (example: hot surfaces with a temperature exceeding 700°C and electric switching device);

▪ only auxiliary devices approved by the manufacturer are used in the duct work; ▪ air inlet AND outlet are connected directly to the same room by ducting. Do NOT

use spaces such as a false ceiling as a duct for the air inlet or outlet.

NOTICE

▪ Precautions shall be taken to avoid excessive vibration or pulsation to

refrigeration piping.

▪ Protection devices, piping and fittings shall be protected as far as possible against

adverse environmental effects.

▪ Provision shall be made for expansion and contraction of long runs of piping. ▪ Piping in refrigerating systems shall be designed and installed such as to minimise

the likelihood of hydraulic shock damaging the system.

▪ The indoor equipment and pipes shall be securely mounted and guarded such

that accidental rupture of equipment or pipes cannot occur from events such as moving furniture or reconstruction activities.

CAUTION

Do NOT use potential sources of ignition in searching for or detection of refrigerant leaks.

Installer reference guide

CVXM20+FVXM25~50A2V1B

Split system air conditioners

4P625991-1A – 2020.09

NOTICE

Contains fluorinated greenhouse gases

tCO2eq

1000

GWP × kg

GWP: xxx

R32

▪ Do NOT re-use joints which have been used already. ▪ Joints made in installation between parts of refrigerant system shall be accessible

for maintenance purposes.

Installation space requirements

WARNING

If appliances contain R32 refrigerant, the floor area of the room in which the appliances are installed, operated and stored MUST be larger than the minimum floor area defined in table below A (m2). This applies to:

▪ Indoor units without a refrigerant leakage sensor; in case of indoor units with

refrigerant leakage sensor, consult the installation manual

▪ Outdoor units installed or stored indoors (e.g. winter garden, garage, machinery

room)

▪ Pipework in unventilated spaces

NOTICE

▪ Pipework shall be protected from physical damage. ▪ Installation of pipework shall be kept to a minimum.

2 | General safety precautions

To determine the minimum floor area

1 Determine the total refrigerant charge in the system (= factory refrigerant

charge + additional refrigerant amount charged).

2 Determine which graph or table to use.

▪ For indoor units: Is the unit ceiling-mounted, wall-mounted or floor-

standing?

▪ For outdoor units installed or stored indoors, and field piping in unventilated

spaces, this depends on the installation height:

If the installation height is… Then use the graph or table for…

<1.8m Floor-standing units

1.8≤x<2.2m Wall-mounted units

≥2.2m Ceiling-mounted units

CVXM20+FVXM25~50A2V1B Split system air conditioners 4P625991-1A – 2020.09

3 Use the graph or table to determine the minimum floor area.

Installer reference guide

2 | General safety precautions

100

110

120

130

140

150

160

170

180

190

200

210

220

230

240

250

260

270

280

290

300

310

320

330

340

350

360

370

380

390

400

410

420

430

440

450

460

470

480

490

500

510

520

530

540

550

1.822.2

2.4

2.6

2.833.2

3.4

3.6

3.844.2

4.4

4.6

4.855.2

5.4

5.6

5.866.2

6.4

6.6

6.877.2

7.4

7.6

7.8

1.843 7.956

8.0

min

(m2)

Floor-standing unit

(c)

Wall-mounted unit

(b)

Ceiling-mounted unit

(a)

m (kg)

Ceiling-mounted

unit

(a)

4.6 13.4

4.6 180

4.8 14.6

4.8 196

5.0 15.8

5.0 213

≤1.842 —

5.2 17.1

≤1.842 —

5.2 230

1.843 3.64

5.4 18.5

1.843 28.9

5.4 248

2.0 3.95

5.6 19.9

2.0 34.0

5.6 267

2.2 4.34

5.8 21.3

2.2 41.2

5.8 286

2.4 4.74

6.0 22.8

2.4 49.0

6.0 306

2.6 5.13

6.2 24.3

2.6 57.5

6.2 327

2.8 5.53

6.4 25.9

2.8 66.7

6.4 349

3.0 5.92

6.6 27.6

3.0 76.6

6.6 371

3.2 6.48

6.8 29.3

3.2 87.2

6.8 394

3.4 7.32

7.0 31.0

3.4 98.4

7.0 417

3.6 8.20

7.2 32.8

3.6 110

7.2 441

3.8 9.14

7.4 34.7

3.8 123

7.4 466

4.0 10.1

7.6 36.6

4.0 136

7.6 492

4.2 11.2

7.8 38.5

4.2 150

7.8 518

4.4 12.3

7.956 40.1

4.4 165

7.956 539

m (kg)

min

(m2)

4.6 20.0

4.8 21.8

5.0 23.6

≤1.842 —

5.2 25.6

1.843 4.45

5.4 27.6

2.0 4.83

5.6 29.7

2.2 5.31

5.8 31.8

2.4 5.79

6.0 34.0

2.6 6.39

6.2 36.4

2.8 7.41

6.4 38.7

3.0 8.51

6.6 41.2

3.2 9.68

6.8 43.7

3.4 10.9

7.0 46.3

3.6 12.3

7.2 49.0

3.8 13.7

7.4 51.8

4.0 15.1

7.6 54.6

4.2 16.7

7.8 57.5

4.4 18.3

7.956 59.9

Wall-mounted

unit

(b)

m (kg)

min

(m2)

Floor-standing

unit

(c)

m (kg)

min

(m2)

Installer reference guide

m Total refrigerant charge in the system

Minimum floor area

min

(a) Ceiling-mounted unit (= Ceiling-mounted unit)

CVXM20+FVXM25~50A2V1B

Split system air conditioners

4P625991-1A – 2020.09

(b) Wall-mounted unit (= Wall-mounted unit)

2.2.3 Refrigerant — in case of R410A or R32

If applicable. See the installation manual or installer reference guide of your application for more information.

NOTICE

Make sure refrigerant piping installation complies with applicable legislation. In Europe, EN378 is the applicable standard.

NOTICE

Make sure the field piping and connections are NOT subjected to stress.

WARNING

During tests, NEVER pressurize the product with a pressure higher than the maximum allowable pressure (as indicated on the nameplate of the unit).

2 | General safety precautions

WARNING

Take sufficient precautions in case of refrigerant leakage. If refrigerant gas leaks, ventilate the area immediately. Possible risks:

▪ Excessive refrigerant concentrations in a closed room can lead to oxygen

deficiency.

▪ Toxic gas might be produced if refrigerant gas comes into contact with fire.

DANGER: RISK OF EXPLOSION

Pump down – Refrigerant leakage. If you want to pump down the system, and there

is a leak in the refrigerant circuit:

▪ Do NOT use the unit's automatic pump down function, with which you can collect

all refrigerant from the system into the outdoor unit. Possible consequence: Selfcombustion and explosion of the compressor because of air going into the operating compressor.

▪ Use a separate recovery system so that the unit's compressor does NOT have to

operate.

WARNING

ALWAYS recover the refrigerant. Do NOT release them directly into the environment. Use a vacuum pump to evacuate the installation.

CVXM20+FVXM25~50A2V1B Split system air conditioners 4P625991-1A – 2020.09

NOTICE

After all the piping has been connected, make sure there is no gas leak. Use nitrogen to perform a gas leak detection.

NOTICE

▪ To avoid compressor breakdown, do NOT charge more than the specified amount

of refrigerant.

▪ When the refrigerant system is to be opened, refrigerant MUST be treated

according to the applicable legislation.

Installer reference guide

2 | General safety precautions

▪ In case recharge is required, see the nameplate of the unit. It states the type of

refrigerant and necessary amount.

▪ The unit is factory charged with refrigerant and depending on pipe sizes and pipe

lengths some systems require additional charging of refrigerant.

▪ Only use tools exclusively for the refrigerant type used in the system, this to

ensure pressure resistance and prevent foreign materials from entering into the system.

▪ Charge the liquid refrigerant as follows:

WARNING

Make sure there is no oxygen in the system. Refrigerant may only be charged after performing the leak test and the vacuum drying.

Possible consequence: Self-combustion and explosion of the compressor because of oxygen going into the operating compressor.

If Then

A siphon tube is present

Charge with the cylinder upright.

(i.e., the cylinder is marked with "Liquid filling siphon attached")

A siphon tube is NOT present Charge with the cylinder upside down.

▪ Open refrigerant cylinders slowly.

▪ Charge the refrigerant in liquid form. Adding it in gas form may prevent normal

operation.

CAUTION

When the refrigerant charging procedure is done or when pausing, close the valve of the refrigerant tank immediately. If the valve is NOT closed immediately, remaining pressure might charge additional refrigerant. Possible consequence: Incorrect refrigerant amount.

2.2.4 Brine

Installer reference guide

If applicable. See the installation manual or installer reference guide of your application for more information.

WARNING

The selection of the brine MUST be in accordance with the applicable legislation.

WARNING

Take sufficient precautions in case of brine leakage. If brine leaks, ventilate the area immediately and contact your local dealer.

CVXM20+FVXM25~50A2V1B

Split system air conditioners

4P625991-1A – 2020.09

2.2.5 Water

2.2.6 Electrical

2 | General safety precautions

WARNING

The ambient temperature inside the unit can get much higher than that of the room, e.g. 70°C. In case of a brine leak, hot parts inside the unit can create a hazardous situation.

WARNING

The use and installation of the application MUST comply with the safety and environmental precautions specified in the applicable legislation.

If applicable. See the installation manual or installer reference guide of your application for more information.

NOTICE

Make sure water quality complies with EU directive 98/83EC.

DANGER: RISK OF ELECTROCUTION

▪ Turn OFF all power supply before removing the switch box cover, connecting

electrical wiring or touching electrical parts.

▪ Disconnect the power supply for more than 10minutes, and measure the voltage

at the terminals of main circuit capacitors or electrical components before servicing. The voltage MUST be less than 50VDC before you can touch electrical components. For the location of the terminals, see the wiring diagram.

▪ Do NOT touch electrical components with wet hands. ▪ Do NOT leave the unit unattended when the service cover is removed.

WARNING

If NOT factory installed, a main switch or other means for disconnection, having a contact separation in all poles providing full disconnection under overvoltage categoryIII condition, MUST be installed in the fixed wiring.

CVXM20+FVXM25~50A2V1B Split system air conditioners 4P625991-1A – 2020.09

Installer reference guide

2 | General safety precautions

WARNING

▪ ONLY use copper wires. ▪ Make sure the field wiring complies with the applicable legislation. ▪ All field wiring MUST be performed in accordance with the wiring diagram

supplied with the product.

▪ NEVER squeeze bundled cables and make sure they do NOT come in contact with

the piping and sharp edges. Make sure no external pressure is applied to the terminal connections.

▪ Make sure to install earth wiring. Do NOT earth the unit to a utility pipe, surge

absorber, or telephone earth. Incomplete earth may cause electrical shock.

▪ Make sure to use a dedicated power circuit. NEVER use a power supply shared by

another appliance.

▪ Make sure to install the required fuses or circuit breakers. ▪ Make sure to install an earth leakage protector. Failure to do so may cause

electrical shock or fire.

▪ When installing the earth leakage protector, make sure it is compatible with the

inverter (resistant to high frequency electric noise) to avoid unnecessary opening of the earth leakage protector.

CAUTION

▪ When connecting the power supply: connect the earth cable first, before making

the current-carrying connections.

▪ When disconnecting the power supply: disconnect the current-carrying cables

first, before separating the earth connection.

▪ The length of the conductors between the power supply stress relief and the

terminal block itself must be as such that the current-carrying wires are tautened before the earth wire is in case the power supply is pulled loose from the stress relief.

NOTICE

Precautions when laying power wiring:

▪ Do NOT connect wiring of different thicknesses to the power terminal block (slack

in the power wiring may cause abnormal heat).

▪ When connecting wiring which is the same thickness, do as shown in the figure

above.

▪ For wiring, use the designated power wire and connect firmly, then secure to

prevent outside pressure being exerted on the terminal board.

▪ Use an appropriate screwdriver for tightening the terminal screws. A screwdriver

with a small head will damage the head and make proper tightening impossible.

▪ Over-tightening the terminal screws may break them.

Installer reference guide

Install power cables at least 1 m away from televisions or radios to prevent interference. Depending on the radio waves, a distance of 1 m may not be sufficient.

CVXM20+FVXM25~50A2V1B

Split system air conditioners

4P625991-1A – 2020.09

2 | General safety precautions

WARNING

▪ After finishing the electrical work, confirm that each electrical component and

terminal inside the electrical components box is connected securely.

▪ Make sure all covers are closed before starting up the unit.

NOTICE

Only applicable if the power supply is three‑phase, and the compressor has an ON/ OFF starting method.

If there exists the possibility of reversed phase after a momentary black out and the power goes on and off while the product is operating, attach a reversed phase protection circuit locally. Running the product in reversed phase can break the compressor and other parts.

CVXM20+FVXM25~50A2V1B Split system air conditioners 4P625991-1A – 2020.09

Installer reference guide

3 | Specific installer safety instructions

3 Specific installer safety instructions

Always observe the following safety instructions and regulations.

Unit installation (see "6Unit installation"[423])

WARNING

The appliance shall be stored in a room without continuously operating ignition sources (example: open flames, an operating gas appliance or an operating electric heater).

CAUTION

For walls containing a metal frame or a metal board, use a wall embedded pipe and wall cover in the feed-through hole to prevent possible heat, electrical shock, or fire.

Piping installation (see "7Piping installation"[435])

DANGER: RISK OF BURNING/SCALDING

CAUTION

▪ Use the flare nut fixed to the unit. ▪ To prevent gas leakage, apply refrigeration oil only to the inside of the flare. Use

refrigeration oil for R32.

▪ Do NOT reuse joints.

CAUTION

▪ Do NOT use mineral oil on flared part. ▪ NEVER install a drier to this R32 unit to guarantee its lifetime. The drying material

may dissolve and damage the system.

CAUTION

▪ Incomplete flaring may cause refrigerant gas leakage. ▪ Do NOT re-use flares. Use new flares to prevent refrigerant gas leakage. ▪ Use flare nuts that are included with the unit. Using different flare nuts may

cause refrigerant gas leakage.

Electrical installation (see "8Electrical installation"[440])

DANGER: RISK OF ELECTROCUTION

Installer reference guide

WARNING

▪ All wiring MUST be performed by an authorised electrician and MUST comply

with the applicable legislation.

▪ Make electrical connections to the fixed wiring. ▪ All components procured on-site and all electrical construction MUST comply

with the applicable legislation.

CVXM20+FVXM25~50A2V1B

Split system air conditioners

4P625991-1A – 2020.09

3 | Specific installer safety instructions

WARNING

▪ If the power supply has a missing or wrong N-phase, equipment might break

down.

▪ Establish proper earthing. Do NOT earth the unit to a utility pipe, surge absorber,

or telephone earth. Incomplete earthing may cause electrical shock.

▪ Install the required fuses or circuit breakers. ▪ Secure the electrical wiring with cable ties so that the cables do NOT come in

contact with sharp edges or piping, particularly on the high-pressure side.

▪ Do NOT use taped wires, stranded conductor wires, extension cords, or

connections from a star system. They can cause overheating, electrical shock or fire.

▪ Do NOT install a phase advancing capacitor, because this unit is equipped with an

inverter. A phase advancing capacitor will reduce performance and may cause accidents.

WARNING

ALWAYS use multicore cable for power supply cables.

WARNING

Use an all-pole disconnection type breaker with at least 3mm between the contact point gaps that provide full disconnection under overvoltage category III.

WARNING

If the supply cord is damaged, it MUST be replaced by the manufacturer, its service agent or similarly qualified persons in order to avoid a hazard.

WARNING

Do NOT connect the power supply to the indoor unit. This could result in electrical shock or fire.

WARNING

▪ Do NOT use locally purchased electrical parts inside the product. ▪ Do NOT branch the power supply for the drain pump, etc. from the terminal

block. This could result in electrical shock or fire.

WARNING

Keep the interconnection wiring away from copper pipes without thermal insulation as such pipes will be very hot.

CVXM20+FVXM25~50A2V1B Split system air conditioners 4P625991-1A – 2020.09

Installer reference guide

4 | About the box

2×1×

1× 2×1× 1× 1×

2×

1×

1× 2×

j k li

edb ca f

4 About the box

4.1 Indoor unit

4.1.1 To unpack the indoor unit

Installer reference guide

4.1.2 To remove the accessories from the indoor unit

1 Remove the accessories located at the bottom of the package. Spare SSID

sticker is located on the unit.

a Installation manual b Operation manual c General safety precautions d Mounting plate (attached to the unit) e Titanium apatite deodorising filter

f Drain hose g Insulation piece h User interface

i User interface holder j Dry battery AAA.LR03 (alkaline) for user interface

k Spare SSID sticker (attached to the unit)

CVXM20+FVXM25~50A2V1B

Split system air conditioners

4P625991-1A – 2020.09

4 | About the box

l Screws

▪ Spare SSID sticker. Do NOT throw away the spare sticker. Keep it in a safe place

in case it is needed in the future (e.g. in case the front grille is replaced, attach it to the new front grille).

CVXM20+FVXM25~50A2V1B Split system air conditioners 4P625991-1A – 2020.09

Installer reference guide

5 | About the unit

cba d

5 About the unit

5.1 System layout

WARNING: MILDLY FLAMMABLE MATERIAL

The refrigerant inside this unit is mildly flammable.

Following symbols may occur on the indoor unit:

Symbol Explanation

Measure the voltage at the terminals of main circuit capacitors or electrical components before servicing.

5.2 Operation range

Use the system in the following temperature and humidity ranges for safe and effective operation.

In combination with outdoor unit RXM25~50, 2MXM40+50, 3MXM40+52

Outdoor temperature –10~46°CDB –15~24°CDB

Indoor temperature 18~32°C DB

Indoor humidity ≤80%

(a)

(b)

a Indoor unit b Drain piping c Refrigerant piping (gas and liquid) d Outdoor unit

Cooling and drying

(a)(b)

Heating

(a)

–15~18°CWB

10~30°CDB

14~23°CWB

(b)

A safety device might stop the operation of the system if the unit runs outside its operation range. Condensation and water dripping might occur if the unit runs outside its operation range.

—

Installer reference guide

In combination with outdoor unit RXTP25+35

Cooling and drying

(a)(b)

Heating

(a)

Outdoor temperature –10~46°CDB –25~24°CDB

–25~18°CWB

CVXM20+FVXM25~50A2V1B

Split system air conditioners

4P625991-1A – 2020.09

5 | About the unit

In combination with outdoor unit RXTP25+35

Cooling and drying

(a)(b)

Heating

(a)

Indoor temperature 18~32°C DB

Indoor humidity ≤80%

(a)

A safety device might stop the operation of the system if the unit runs outside its operation range.

(b)

Condensation and water dripping might occur if the unit runs outside its operation range.

5.3 About the wireless LAN

For detailed specifications, installation instructions, setting methods, FAQ, declaration of conformity and the latest version of this manual, visit http://

www.onlinecontroller.daikineurope.com.

INFORMATION

▪ Daikin Industries Czech Republic s.r.o. declares that the radio equipment type

inside of this unit is in compliance with Directive 2014/53/EU.

▪ This unit is considered as combined equipment according to the definition of

Directive 2014/53/EU.

14~23°CWB

(b)

10~30°CDB

—

5.3.1 Precautions when using the wireless LAN

Do NOT use near:

▪ Medical equipment. E.g. persons using cardiac pacemakers or defibrillators. This

product may cause electromagnetic interference.

▪ Auto-control equipment. E.g. automatic doors or fire alarm equipment. This

product may cause faulty behaviour of the equipment.

▪ Microwave oven. It may affect wireless LAN communications.

5.3.2 Basic parameters

What Value

Frequency range 2400MHz~2483.5MHz

Radio protocol IEEE 802.11b/g/n

Radio frequency channel 13ch

Output power 13dBm

Effective radiated power 15dBm (11b) / 14dBm (11g) / 14dBm

Power supply DC 14 V / 100 mA

(11n)

5.3.3 Setting the wireless LAN

CVXM20+FVXM25~50A2V1B Split system air conditioners 4P625991-1A – 2020.09

The customer is responsible for providing:

▪ Smartphone or tablet with minimum supported version of Android or iOS,

specified on http://www.onlinecontroller.daikineurope.com

Installer reference guide

5 | About the unit

To install the Daikin Residential Controller application

▪ Internet line and communicating device, such as modem, router, etc.

▪ Wireless LAN access point.

▪ Installed free Daikin Residential Controller application.

1 Open:

▪ Google Play for appliances using Android. ▪ App Store for appliances using iOS.

2 Search for Daikin Residential Controller.

3 Follow the directions on the screen to install.

Installer reference guide

CVXM20+FVXM25~50A2V1B

Split system air conditioners

4P625991-1A – 2020.09

6 Unit installation

In this chapter

6.1 Preparing the installation site ................................................................................................................................................ 23

6.1.1 Installation site requirements of the indoor unit .................................................................................................. 23

6.2 Opening the indoor unit ......................................................................................................................................................... 25

6.2.1 To remove the front panel ..................................................................................................................................... 25

6.2.2 To remove the front grille ...................................................................................................................................... 25

6.2.3 To open the terminal block and remove the electrical wiring box cover ............................................................. 25

6.3 Mounting the indoor unit....................................................................................................................................................... 26

6.3.1 To install the indoor unit ........................................................................................................................................ 26

6.3.2 To drill a wall hole .................................................................................................................................................. 31

6.3.3 To remove the slit portions.................................................................................................................................... 31

6.3.4 To provide drainage ............................................................................................................................................... 32

6.4 Mounting the user interface .................................................................................................................................................. 34

6.4.1 To mount the user interface holder ...................................................................................................................... 34

6.1 Preparing the installation site

Do NOT install the unit in places often used as work place. In case of construction works (e.g. grinding works) where a lot of dust is created, the unit MUST be covered.

6 | Unit installation

Choose an installation location with sufficient space for carrying the unit in and out of the site.

WARNING

The appliance shall be stored in a room without continuously operating ignition sources (example: open flames, an operating gas appliance or an operating electric heater).

6.1.1 Installation site requirements of the indoor unit

INFORMATION

Also read the precautions and requirements in the "2 General safety

precautions"[45].

INFORMATION

The sound pressure level is less than 70dBA.

NOTICE

The equipment described in this manual may cause electronic noise generated from radio-frequency energy. The equipment complies to specifications that are designed to provide reasonable protection against such interference. However, there is no guarantee that interference will not occur in a particular installation.

It is therefore recommended to install the equipment and electric wires in such a way that they keep a proper distance from stereo equipment, personal computers, etc.

CVXM20+FVXM25~50A2V1B Split system air conditioners 4P625991-1A – 2020.09

Install power cables at least 1 m away from televisions or radios to prevent interference. Depending on the radio waves, a distance of 1 m may not be sufficient.

Installer reference guide

6 | Unit installation

≤60

(65)

≤27°

(mm)

≥467

≥50 ≥50

A B

(105)

≤60

▪ Fluorescent lights. When installing a wireless user interface in a room with

fluorescent lights, mind the following to avoid interference:

- Install the wireless user interface as close as possible to the indoor unit.

- Install the indoor unit as far as possible from the fluorescent lights.

▪ Take care that in the event of a water leak, water cannot cause any damage to

the installation space and surroundings.

▪ Choose a location where the operation noise or the hot/cold air discharged from

the unit will not disturb anyone.

▪ Air flow. Make sure nothing blocks the air flow.

▪ Drainage. Make sure condensation water can be evacuated properly.

▪ Wall insulation. When conditions in the wall exceed 30°C and a relative humidity

of 80%, or when fresh air is inducted into the wall, then additional insulation is required (minimum 10mm thickness, polyethylene foam).

▪ Wall or floor strength. Check whether the wall or the floor is strong enough to

support the weight of the unit. If there is a risk, reinforce the wall or the floor before installing the unit.

Do NOT install the unit in the following places:

▪ In places where a mineral oil mist, spray or vapour may be present in the

atmosphere. Plastic parts may deteriorate and fall off or cause water leakage.

It is NOT recommended to install the unit in the following places because it may shorten the life of the unit:

▪ Where the voltage fluctuates a lot

▪ In vehicles or vessels

▪ Where acidic or alkaline vapour is present

▪ In places where a mineral oil mist, spray or vapour may be present in the

atmosphere. Plastic parts may deteriorate and fall off or cause water leakage.

▪ In places where the unit would be in the path of direct sunlight.

▪ In bathrooms.

▪ Sound sensitive areas (e.g. near a bedroom), so that the operation noise will

cause no trouble.

▪ Spacing. Mind the following requirements:

Installer reference guide

A Front view B Side view

▪ Do not install the unit more than 60mm above the floor.

CVXM20+FVXM25~50A2V1B

Split system air conditioners

4P625991-1A – 2020.09

6.2 Opening the indoor unit

4×

6.2.1 To remove the front panel

1 Slide both sliders in the direction of the arrows until they click.

2 Open the front panel and undo the string.

6 | Unit installation

3 Remove the front panel.

6.2.2 To remove the front grille

1 Remove the front panel. See "6.2.1To remove the front panel"[425].

2 Remove the 4 screws, remove the grill from 4 tabs on the top and remove the

front grille while pulling it toward you.

a Front grille b Tabs

6.2.3 To open the terminal block and remove the electrical wiring box cover

CVXM20+FVXM25~50A2V1B Split system air conditioners 4P625991-1A – 2020.09

To open the terminal block

1 Remove the front grille.

2 Remove 1 lower screw.

3 Lift the sensor securing plate.

Installer reference guide

6 | Unit installation

A B C

4 Move the metal plate cover down and then towards you to remove it.

a Screw b Sensor securing plate c Metal plate cover

To remove the electrical wiring box cover

1 Open the terminal block.

2 Remove 1 screw from the electrical wiring box.

3 Unhook the 2 tabs on the electrical wiring box cover and remove it.

6.3 Mounting the indoor unit

6.3.1 To install the indoor unit

Installer reference guide

a Screw b Wiring box cover c Tabs

Installation options

There are 3 possible type of installation for the indoor unit.

A Floor (exposed) installation B Wall (exposed) installation

C Half concealed installation a Mounting plate b Skirting board

CVXM20+FVXM25~50A2V1B

Split system air conditioners

4P625991-1A – 2020.09

6 | Unit installation

(mm)

634.5

750

006

300

200

285

115

159

238

689

159

Ø65

A B

6×

Floor-standing installation

6‒1 Indoor unit installation drawing: Floor-standing installation

A Front view B Side view C Top view

a Screw hole 6×

b Left-back piping hole location

c Right-back piping hole location

d Left/right piping hole location

e Left-bottom piping hole location

f Right-bottom piping hole location

1 Drill a wall hole, depending on which side piping is taken out. See "6.3.2 To

drill a wall hole"[431].

CVXM20+FVXM25~50A2V1B Split system air conditioners 4P625991-1A – 2020.09

2 Open the front panel and remove the front grille (see "6.2Opening the indoor

unit"[425]).

3 Remove the slit portions using nippers. See "6.3.3 To remove the slit

portions"[431].

4 Secure the unit to the wall and floor using 6 screws M4×25L (field supply).

5 When the complete installation is finished, attach the front panel and the

front grille in their original position.

Installer reference guide

6 | Unit installation

166

06≤

(mm)

634.5

750

006

553

300

200

285

115

238

Ø65

A B

c c

5×

Wall-mounted installation

6‒2 Indoor unit installation drawing: Wall-mounted installation

A Front view B Side view

C Top view a Mounting plate b Screw hole 4× c Floor d Left-back piping hole location e Right-back piping hole location

f Left/right piping hole location g Left-bottom piping hole location h Right-bottom piping hole location

6 Temporarily secure the mounting plate on the wall.

Installer reference guide

7 Make sure the mounting plate is level.

8 Mark the centres of the drilling points on the wall.

9 Secure the mounting plate on the wall using 5 screws M4×25L (field supply).

10 Drill a wall hole, depending on which side piping is taken out. See "6.3.2 To

drill a wall hole"[431].

11 Open the front panel and remove the front grille (see "6.2Opening the indoor

unit"[425]).

12 Remove the slit portions using nippers. See "6.3.3 To remove the slit

portions"[431].

13 If necessary for the skirting board, remove the slit portion on the bottom

frame.

CVXM20+FVXM25~50A2V1B

Split system air conditioners

4P625991-1A – 2020.09

6 | Unit installation

≤60

4×

a Bottom frame

b Slit portion

14 Align the unit using the alignment symbol on the mounting plate:

375 mm from the alignment symbol to the each side (unit width 750 mm), 487mm from the alignment symbol to the bottom of the unit.

15 Hook the unit on the mounting plate and secure the unit to the wall using 4

screws M4×25L (field supply).

CVXM20+FVXM25~50A2V1B Split system air conditioners 4P625991-1A – 2020.09

a Alignment symbol

16 When the complete installation is finished, attach the front panel and the

front grille in their original position.

Installer reference guide

6 | Unit installation

5 4

734~740

170

350

200

593~595

170 350

d e

A B

(mm)

Ø60

159

238

689

159

b b

634.5

115

285

300

6×

Half-concealed installation

6‒3 Indoor unit installation drawing: Half-concealed installation

A Front view B Side view

C Top view a Extra filler board b Screw hole 6× c Hole d Left-back piping hole location e Right-back piping hole location

f Right/left piping hole location g Left-bottom piping hole location h Right-bottom piping hole location

17 Make a hole in the wall as illustrated above.

Installer reference guide

18 Install the extra filler board (field supply) in accordance with the space

between the unit and the wall. Make sure there is no gap between the unit and the wall.

19 Drill a wall hole, depending on which side piping is taken out. See "6.3.2 To

drill a wall hole"[431].

20 Remove the slit portions using nippers. See "6.3.3 To remove the slit

portions"[431].

21 Open the front panel, remove the front grille, remove the top and side casings

(see "6.2Opening the indoor unit"[425]).

22 Secure the unit to the extra filler board and to the floor using 6 screws

M4×25L (field supply).

CVXM20+FVXM25~50A2V1B

Split system air conditioners

4P625991-1A – 2020.09

23 When the complete installation is finished, attach the front panel and the

Ø65

c d

6.3.2 To drill a wall hole

1 Bore a 65 mm large feed-through hole in the wall with a downward slope

2 Insert a wall embedded pipe into the hole.

3 Insert a wall cover into the wall pipe.

6 | Unit installation

front grille in their original position.

CAUTION

For walls containing a metal frame or a metal board, use a wall embedded pipe and wall cover in the feed-through hole to prevent possible heat, electrical shock, or fire.

NOTICE

Be sure to seal the gaps around the pipes with sealing material (field supply), in order to prevent water leakage.

towards the outside.

a Wall embedded pipe

b Putty

c Wall hole cover

4 After completing wiring, refrigerant piping and drain piping, do NOT forget to

seal the gap with putty.

6.3.3 To remove the slit portions

For side piping (left/right) and bottom piping (left/right) slit portions must be removed. Remove slit portions according to where the piping is taken out.

a Bottom frame

b Slit portion for side piping on the front grille (same on the other side)

c Slit portion for side piping on the bottom frame (same of the other side)

d Slit portion for the bottom piping

1 Cut off the slit portion using nippers.

CVXM20+FVXM25~50A2V1B Split system air conditioners 4P625991-1A – 2020.09

Installer reference guide

6 | Unit installation

2 Remove an burrs along the cut section using a half round needle file.

6.3.4 To provide drainage

Make sure condensation water can be evacuated properly. This involves:

▪ General guidelines

▪ Connecting the drain piping to the indoor unit

▪ Checking for water leaks

General guidelines

▪ Pipe length. Keep drain piping as short as possible. Minimum is 3m.

▪ Pipe size. Use rigid polyvinyl chloride pipe with 20 mm nominal diameter and

26mm outer diameter.

NOTICE

▪ Install the drain hose with a downward slope. ▪ Traps are NOT permitted. ▪ Do NOT put the end of the hose in water.

Installer reference guide

▪ Drain hose. Drain hose (accessory) is 220 mm long and with 18 mm outer

diameter on the connecting side.

▪ Extension hose. Use rigid polyvinyl chloride pipe (field supply) with 20 mm

nominal diameter as extension hose. When connecting an extension hose, use a polyvinyl adhesive agent for glueing.

CVXM20+FVXM25~50A2V1B

Split system air conditioners

4P625991-1A – 2020.09

▪ Condensation. Take measures against condensation. Insulate the complete drain

1×

100

≥50

220

150

100

(mm)

piping in the building.

To connect the drain piping to the indoor unit

NOTICE

Incorrect connection of the drain hose might cause leaks, and damage the installation space and surroundings.

1 Push the drain hose (accessory) as far as possible over the drain socket and fix

it with 1 screw (accessory).

6 | Unit installation

a Drain pan

b Drain socket

c Drain hose (accessory)

d Screw (accessory)

2 Check for water leaks (see "To check for water leaks"[433]).

3 Insulate the indoor drain socket and drain hose with ≥10 mm insulation

material to prevent condensation.

4 Connect the drain piping to the drain hose. Insert the drain hose ≥50mm, so it

will not be pulled out of the drain pipe.

a Drain hose (accessory)

b Vinyl chloride drain pipe (VP-30) (field supply)

c Reducer (field supply)

d Vinyl chloride drain pipe (VP-20) (field supply)

To check for water leaks

CVXM20+FVXM25~50A2V1B Split system air conditioners 4P625991-1A – 2020.09

1 Remove the air filters.

2 Gradually pour approximately 1 l of water in the drain pan, and check for

water leaks.

Installer reference guide

6 | Unit installation

cba

2×

6.4 Mounting the user interface

6.4.1 To mount the user interface holder

a User interface b Screws (field supply) c User interface holder

1 Choose a place where the signal can reach the unit.

2 Fix the user interface holder (accessory) to the wall or a similar location using

2 M3×20L screws (field supply).

3 Insert the user interface into the user interface holder.

Installer reference guide

CVXM20+FVXM25~50A2V1B

Split system air conditioners

4P625991-1A – 2020.09

7 Piping installation

In this chapter

7.1 Preparing refrigerant piping................................................................................................................................................... 35

7.1.1 Refrigerant piping requirements ........................................................................................................................... 35

7.1.2 Refrigerant piping insulation.................................................................................................................................. 36

7.2 Connecting the refrigerant piping.......................................................................................................................................... 36

7.2.1 About connecting the refrigerant piping ............................................................................................................... 36

7.2.2 Precautions when connecting the refrigerant piping............................................................................................ 36

7.2.3 Guidelines when connecting the refrigerant piping.............................................................................................. 37

7.2.4 Pipe bending guidelines ......................................................................................................................................... 38

7.2.5 To flare the pipe end .............................................................................................................................................. 38

7.2.6 To connect the refrigerant piping to the indoor unit ............................................................................................ 39

7.1 Preparing refrigerant piping

7.1.1 Refrigerant piping requirements

INFORMATION

Also read the precautions and requirements in the "2 General safety

precautions"[45].

7 | Piping installation

▪ Foreign materials inside pipes (including oils for fabrication) must be

≤30mg/10m.

Refrigerant piping diameter

Use the same diameters as the connections on the outdoor units:

Class Pipe outer diameter (mm)

25+35 Ø6.4 Ø9.5

50 Ø6.4 Ø12.7

Refrigerant piping material

NOTICE

The piping and other pressure-containing parts shall be suitable for refrigerant. Use phosphoric acid deoxidised seamless copper for refrigerant.

INFORMATION

Additional refrigerant charge is NOT allowed in case of combination of the outdoor unit 3MXM40N8 or 3MXM52N8 with the indoor units CVXM-A and/or FVXM-A. The total piping length MUST be ≤30m.

Liquid piping Gas piping

▪ Piping material: Phosphoric acid deoxidised seamless copper.

▪ Piping temper grade and thickness:

Outer diameter (Ø) Temper grade Thickness (t)

(a)

6.4mm (1/4") Annealed (O) ≥0.8mm

9.5mm (3/8")

12.7mm (1/2")

CVXM20+FVXM25~50A2V1B Split system air conditioners 4P625991-1A – 2020.09

Installer reference guide

7 | Piping installation

ØiØ

ØpØ

7.1.2 Refrigerant piping insulation

(a)

Depending on the applicable legislation and the maximum working pressure of the unit (see "PS High" on the unit name plate), larger piping thickness might be required.

▪ Use polyethylene foam as insulation material:

- with a heat transfer rate between 0.041 and 0.052 W/mK (0.035 and

0.045kcal/mh°C)

- with a heat resistance of at least 120°C

▪ Insulation thickness

Pipe outer diameter (Øp) Insulation inner diameter

6.4mm (1/4") 8~10mm ≥10mm

9.5mm (3/8") 12~15mm ≥13mm

12.7mm (1/2") 14~16mm ≥13mm

If the temperature is higher than 30°C and the humidity is higher than RH80%, the thickness of the insulation materials should be at least 20 mm to prevent condensation on the surface of the insulation.

7.2 Connecting the refrigerant piping

7.2.1 About connecting the refrigerant piping

Before connecting the refrigerant piping

Make sure the outdoor and indoor unit are mounted.

Insulation thickness (t)

(Øi)

Typical workflow

Connecting the refrigerant piping involves:

▪ Connecting the refrigerant piping to the indoor unit

▪ Connecting the refrigerant piping to the outdoor unit

▪ Insulating the refrigerant piping

▪ Keeping in mind the guidelines for:

- Pipe bending

- Flaring pipe ends

- Using the stop valves

7.2.2 Precautions when connecting the refrigerant piping

INFORMATION

Also read the precautions and requirements in the following chapters:

▪ General safety precautions ▪ Preparation

Installer reference guide

CVXM20+FVXM25~50A2V1B

Split system air conditioners

4P625991-1A – 2020.09

7 | Piping installation

DANGER: RISK OF BURNING/SCALDING

CAUTION

▪ Use the flare nut fixed to the unit. ▪ To prevent gas leakage, apply refrigeration oil only to the inside of the flare. Use

refrigeration oil for R32.

▪ Do NOT reuse joints.

CAUTION

▪ Do NOT use mineral oil on flared part. ▪ NEVER install a drier to this R32 unit to guarantee its lifetime. The drying material

may dissolve and damage the system.

NOTICE

Take the following precautions on refrigerant piping into account:

▪ Avoid anything but the designated refrigerant to get mixed into the refrigerant

cycle (e.g. air).

▪ Only use R32 when adding refrigerant. ▪ Only use installation tools (e.g. manifold gauge set) that are exclusively used for

R32 installations to withstand the pressure and to prevent foreign materials (e.g. mineral oils and moisture) from mixing into the system.

▪ Install the piping so that the flare is NOT subjected to mechanical stress. ▪ Protect the piping as described in the following table to prevent dirt, liquid or

dust from entering the piping.

▪ Use caution when passing copper tubes through walls (see figure below).

7.2.3 Guidelines when connecting the refrigerant piping

CVXM20+FVXM25~50A2V1B Split system air conditioners 4P625991-1A – 2020.09

Unit Installation period Protection method

Outdoor unit >1month Pinch the pipe

<1month Pinch or tape the pipe

Indoor unit Regardless of the period

INFORMATION

Do NOT open the refrigerant stop valve before checking the refrigerant piping. When you need to charge additional refrigerant it is recommended to open the refrigerant stop valve after charging.

Take the following guidelines into account when connecting pipes:

▪ Coat the flare inner surface with ether oil or ester oil when connecting a flare

nut. Tighten 3 or 4 turns by hand, before tightening firmly.

Installer reference guide

7 | Piping installation

0.4~0.8

±2

45°

90°

±2

ØA

a b

▪ ALWAYS use 2 wrenches together when loosening a flare nut.

▪ ALWAYS use a spanner and torque wrench together to tighten the flare nut when

connecting the piping. This to prevent nut cracking and leaks.

a Torque wrench b Spanner c Piping union d Flare nut

Piping size (mm) Tightening torque

(N•m)

Flare dimensions

(A) (mm)

Flare shape (mm)

Ø6.4 15~17 8.7~9.1

Ø9.5 33~39 12.8~13.2

Ø12.7 50~60 16.2~16.6

7.2.4 Pipe bending guidelines

Use a pipe bender for bending. All pipe bends should be as gentle as possible (bending radius should be 30~40 mm or larger).

7.2.5 To flare the pipe end

1 Cut the pipe end with a pipe cutter.

2 Remove burrs with the cut surface facing down so that the chips do NOT enter

the pipe.

CAUTION

cause refrigerant gas leakage.

Installer reference guide

a Cut exactly at right angles. b Remove burrs.

3 Remove the flare nut from the stop valve and put the flare nut on the pipe.

4 Flare the pipe. Set exactly at the position as shown in the following figure.

CVXM20+FVXM25~50A2V1B

Split system air conditioners

4P625991-1A – 2020.09

7 | Piping installation

a b

c d

Flare tool for R32

(clutch type)

A 0~0.5mm 1.0~1.5mm 1.5~2.0mm

5 Check that the flaring is properly made.

a Flare’s inner surface MUST be flawless.

b The pipe end MUST be evenly flared in a perfect circle.

c Make sure the flare nut is fitted.

7.2.6 To connect the refrigerant piping to the indoor unit

WARNING: MILDLY FLAMMABLE MATERIAL

The refrigerant inside this unit is mildly flammable.

▪ Pipe length. Keep refrigerant piping as short as possible. Minimum is 3m.

Conventional flare tool

Clutch type

(Ridgid-type)

Wing nut type

(Imperial-type)

1 Connect refrigerant piping to the unit using flare connections.

2 Insulate the refrigerant piping on the indoor unit as follows:

a Gas pipe

b Gas pipe insulation

c Liquid pipe

d Liquid pipe insulation

NOTICE

Make sure to insulate all refrigerant piping. Any exposed piping might cause condensation.

3 Close the slit on the refrigerant pipe connection and secure it with a tape

(field supply). Make sure there are no gaps.

4 Wrap the slit and the end of the insulation of the connected refrigerant piping

with insulation piece (accessory). Make sure there are no gaps.

CVXM20+FVXM25~50A2V1B Split system air conditioners 4P625991-1A – 2020.09

a Refrigerant pipe connection

b Refrigerant piping (field supply)

c Slit

d Tape

e Insulation piece (accessory)

Installer reference guide

8 | Electrical installation

8 Electrical installation

In this chapter

8.1 About connecting the electrical wiring

8.1 About connecting the electrical wiring .................................................................................................................................. 40

8.1.1 Precautions when connecting the electrical wiring .............................................................................................. 40

8.1.2 Guidelines when connecting the electrical wiring ................................................................................................ 41

8.1.3 Specifications of standard wiring components ..................................................................................................... 42

8.2 To connect the electrical wiring to the indoor unit ............................................................................................................... 42

8.3 To connect optional accessories (wired user interface, central user interface, wireless adapter, etc.).............................. 43

Typical workflow

Connecting the electrical wiring typically consists of the following stages:

1 Making sure the power supply system complies with the electrical

specifications of the units.

2 Connecting the electrical wiring to the outdoor unit. 3 Connecting the electrical wiring to the indoor unit. 4 Connecting the main power supply.

8.1.1 Precautions when connecting the electrical wiring

DANGER: RISK OF ELECTROCUTION

WARNING

ALWAYS use multicore cable for power supply cables.

INFORMATION

Also read the precautions and requirements in the "2 General safety

precautions"[45].

INFORMATION

Also read "8.1.3Specifications of standard wiring components"[442].

WARNING

▪ All wiring MUST be performed by an authorised electrician and MUST comply

with the applicable legislation.

▪ Make electrical connections to the fixed wiring. ▪ All components procured on-site and all electrical construction MUST comply

with the applicable legislation.

Installer reference guide

CVXM20+FVXM25~50A2V1B

Split system air conditioners

4P625991-1A – 2020.09

8 | Electrical installation

b a