Daikin CTXM15R2V1B, CTXM15R5V1B, FTXM20R2V1B, FTXM20R5V1B, FTXM25R2V1B Installer reference guide

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Installer reference guide

Daikin room air conditioner

CTXM15R2V1B CTXM15R5V1B

FTXM20R2V1B FTXM20R5V1B FTXM25R2V1B FTXM25R5V1B FTXM35R2V1B FTXM35R5V1B FTXM42R2V1B FTXM42R5V1B

FTXM50R2V1B FTXM60R2V1B FTXM71R2V1B

ATXM20R2V1B ATXM20R5V1B ATXM25R2V1B ATXM25R5V1B ATXM35R2V1B ATXM35R5V1B ATXM50R2V1B

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 Overview: About the box ................................................................................................................................................ 18

4.2 Indoor unit ...................................................................................................................................................................... 18

4.2.1 To unpack the indoor unit .............................................................................................................................. 18

4.2.2 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................................................................................................................................. 22

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 ................................................................................................................................................. 24

6.2.1 To remove the front panel ............................................................................................................................. 24

6.2.2 To open the service cover .............................................................................................................................. 25

6.2.3 To remove the front grille .............................................................................................................................. 25

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

6.3.1 To install the mounting plate ......................................................................................................................... 26

6.3.2 To drill a wall hole........................................................................................................................................... 27

6.3.3 To remove the pipe port cover ...................................................................................................................... 28

6.4 Connecting the drain piping ........................................................................................................................................... 28

6.4.1 General guidelines .......................................................................................................................................... 28

6.4.2 To connect the piping on right side, right-back, or right-bottom ................................................................. 29

6.4.3 To connect the piping on left side, left-back, or left-bottom ........................................................................ 30

6.4.4 To check for water leaks................................................................................................................................. 31

7 Piping installation 32

7.1 Preparing refrigerant piping ........................................................................................................................................... 32

7.1.1 Refrigerant piping requirements.................................................................................................................... 32

7.1.2 Refrigerant piping insulation .......................................................................................................................... 33

7.2 Connecting the refrigerant piping .................................................................................................................................. 33

7.2.1 About connecting the refrigerant piping ....................................................................................................... 33

7.2.2 Precautions when connecting the refrigerant piping .................................................................................... 34

7.2.3 Guidelines when connecting the refrigerant piping ...................................................................................... 35

7.2.4 Pipe bending guidelines ................................................................................................................................. 35

7.2.5 To flare the pipe end ...................................................................................................................................... 35

7.2.6 To connect the refrigerant piping to the indoor unit .................................................................................... 36

Installer reference guide

8 Electrical installation 37

8.1 About connecting the electrical wiring .......................................................................................................................... 37

8.1.1 Precautions when connecting the electrical wiring....................................................................................... 37

8.1.2 Guidelines when connecting the electrical wiring......................................................................................... 38

8.1.3 Specifications of standard wiring components.............................................................................................. 39

8.2 To connect the electrical wiring to the indoor unit ....................................................................................................... 39

9 Finishing the indoor unit installation 42

CTXM15+FTXM20~42+ATXM20~35R2/5V1B + FTXM50~71R2V1B +

Daikin room air conditioner

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4P518023-8G – 2020.06

Table of contents

9.1 To insulate the drain piping, refrigerant piping and interconnection cable.................................................................. 42

9.2 To pass the pipes through the wall hole ........................................................................................................................ 42

9.3 To fix the unit on the mounting plate ............................................................................................................................ 43

9.4 To close the indoor unit.................................................................................................................................................. 43

9.4.1 To re-install the front grille ............................................................................................................................ 43

9.4.2 To close the service cover .............................................................................................................................. 43

9.4.3 To re-install the front panel ........................................................................................................................... 43

10 Configuration 45

10.1 To set a different address ............................................................................................................................................... 45

11 Commissioning 47

11.1 Overview: Commissioning .............................................................................................................................................. 47

11.2 Checklist before commissioning ..................................................................................................................................... 47

11.3 To perform a test run...................................................................................................................................................... 48

11.3.1 To perform a test run using the user interface ............................................................................................. 48

12 Hand-over to the user 49

13 Disposal 50

14 Technical data 51

14.1 Wiring diagram................................................................................................................................................................ 51

14.1.1 Unified wiring diagram legend....................................................................................................................... 51

15 Glossary 54

CTXM15+FTXM20~42+ATXM20~35R2/5V1B + FTXM50~71R2V1B + ATXM50R2V1B Daikin room air conditioner 4P518023-8G – 2020.06

Installer reference guide

1 | About the documentation

1 About the documentation

1.1 About this document

Target audience

Authorised installers

Documentation set

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

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.

▪ 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).

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

(authentication required).

Installer reference guide

CTXM15+FTXM20~42+ATXM20~35R2/5V1B + FTXM50~71R2V1B +

Daikin room air conditioner

ATXM50R2V1B

4P518023-8G – 2020.06

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.

Symbols used on the unit:

CTXM15+FTXM20~42+ATXM20~35R2/5V1B + FTXM50~71R2V1B + ATXM50R2V1B Daikin room air conditioner 4P518023-8G – 2020.06

NOTICE

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

INFORMATION

Indicates useful tips or additional information.

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.

CTXM15+FTXM20~42+ATXM20~35R2/5V1B + FTXM50~71R2V1B +

Daikin room air conditioner

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4P518023-8G – 2020.06

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.

▪ 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.

Instructions for equipment using R32 refrigerant

CTXM15+FTXM20~42+ATXM20~35R2/5V1B + FTXM50~71R2V1B + ATXM50R2V1B Daikin room air conditioner 4P518023-8G – 2020.06

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

CTXM15+FTXM20~42+ATXM20~35R2/5V1B + FTXM50~71R2V1B +

Daikin room air conditioner

ATXM50R2V1B

4P518023-8G – 2020.06

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

CTXM15+FTXM20~42+ATXM20~35R2/5V1B + FTXM50~71R2V1B + ATXM50R2V1B Daikin room air conditioner 4P518023-8G – 2020.06

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)

CTXM15+FTXM20~42+ATXM20~35R2/5V1B + FTXM50~71R2V1B +

Daikin room air conditioner

ATXM50R2V1B

4P518023-8G – 2020.06

(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.

CTXM15+FTXM20~42+ATXM20~35R2/5V1B + FTXM50~71R2V1B + ATXM50R2V1B Daikin room air conditioner 4P518023-8G – 2020.06

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.

CTXM15+FTXM20~42+ATXM20~35R2/5V1B + FTXM50~71R2V1B +

Daikin room air conditioner

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4P518023-8G – 2020.06

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.

CTXM15+FTXM20~42+ATXM20~35R2/5V1B + FTXM50~71R2V1B + ATXM50R2V1B Daikin room air conditioner 4P518023-8G – 2020.06

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

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.

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Daikin room air conditioner

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4P518023-8G – 2020.06

2 | General safety precautions

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.

CTXM15+FTXM20~42+ATXM20~35R2/5V1B + FTXM50~71R2V1B + ATXM50R2V1B Daikin room air conditioner 4P518023-8G – 2020.06

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).

WARNING

Do NOT place objects below the indoor and/or outdoor unit that may get wet. Otherwise condensation on the main unit or refrigerant pipes, air filter dirt or drain blockage may cause dripping, and objects under the unit may get dirty or damaged.

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32])

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.

Installer reference guide

Electrical installation (see "8Electrical installation"[437])

DANGER: RISK OF ELECTROCUTION

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3 | Specific installer safety instructions

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.

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.

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WARNING

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

Installer reference guide

4 | About the box

1×1× 2× 2× 2×1× 1× 1×1× 1× 1×

fe1d e2ba c g h i j

4 About the box

4.1 Overview: About the box

This chapter describes what you have to do after the box with the indoor unit is delivered on-site.

It contains information about:

▪ Unpacking and handling the unit

▪ Removing the accessories from the unit

Keep the following in mind:

▪ At delivery, the unit MUST be checked for damage. Any damage MUST be

reported immediately to the claims agent of the carrier.

▪ Bring the packed unit as close as possible to its final installation position to

prevent damage during transport.

▪ When handling the unit, take into account the following:

Fragile, handle the unit with care.

Keep the unit upright in order to avoid damage.

▪ Prepare the path along which you want to bring the unit inside in advance.

4.2 Indoor unit

4.2.1 To unpack the indoor unit

4.2.2 To remove the accessories from the indoor unit

Installer reference guide

1 Remove:

▪ the accessory bag located at the bottom of the package,

▪ the mounting plate attached to the back of the indoor unit,

▪ the spare SSID sticker located on the front grille.

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4 | About the box

a Installation manual b Operation manual c General safety precautions

d Spare SSID sticker e1 Class 15~42: Silver allergen removal air purifying filter (without frame) e2 Class 50~71: Titanium apatite deodorising filter and silver allergen removal air purifying filter (with frame)

f Indoor unit fixing screw (M4×12L). Refer to "9.3To fix the unit on the mounting plate"[443]. g Dry battery AAA.LR03 (alkaline) for user interface h User interface holder

i User interface

j Mounting plate

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

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

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Installer reference guide

5 | About the unit

h1 h2

5 About the unit

5.1 System layout

WARNING: MILDLY FLAMMABLE MATERIAL

The refrigerant inside this unit is mildly flammable.

a Front cover b Service cover c Caulk pipe hole gap with putty d Refrigerant piping, drain hose and interconnection cable e Intelligent eye sensor

f Insulation tape

g Air filters h1 Class 15~42: Silver allergen removal air purifying filter (without frame) h2 Class 50~71: Titanium apatite deodorising filter and silver allergen removal air purifying filter (with frame)

5.2 Operation range

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

Outdoor temperature –20~52°CDB –20~24°CDB

Indoor temperature 17~38°C DB

Indoor humidity ≤80%

(a)

(b)

In combination with outdoor units: RXM71R, 2MXM, 2AMXM, 3MXM, 3AMXM,

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

In combination with outdoor unit RZAG

Cooling and drying

(a)(b)

Heating

(a)

–21~18°CWB

10~27°CDB

12~28°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.

—

4MXM, 5MXM

Cooling and drying

(a)(b)

Heating

(a)

–15~18°CWB

Installer reference guide

Indoor temperature 18~37°C DB

Indoor humidity ≤80%

10~30°CDB

14~28°CWB

(a)

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—

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5 | About the unit

(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.

In combination with other outdoor units

Cooling and drying

(a)(b)

Heating

Outdoor temperature –10~50°CDB –20~24°CDB

–21~18°CWB

(a)

Indoor temperature 18~37°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.

14~28°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 1~13

Output power 13dBm

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

Power supply DC 14 V / 100 mA

(11n)

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Installer reference guide

5 | About the unit

5.3.3 Setting the wireless LAN

To install the Daikin Residential Controller application

The customer is responsible for providing:

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

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

▪ 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

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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 ......................................................................................................................................................... 24

6.2.1 To remove the front panel ..................................................................................................................................... 24

6.2.2 To open the service cover ...................................................................................................................................... 25

6.2.3 To remove the front grille ...................................................................................................................................... 25

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

6.3.1 To install the mounting plate ................................................................................................................................. 26

6.3.2 To drill a wall hole .................................................................................................................................................. 27

6.3.3 To remove the pipe port cover .............................................................................................................................. 28

6.4 Connecting the drain piping ................................................................................................................................................... 28

6.4.1 General guidelines.................................................................................................................................................. 28

6.4.2 To connect the piping on right side, right-back, or right-bottom ......................................................................... 29

6.4.3 To connect the piping on left side, left-back, or left-bottom................................................................................ 30

6.4.4 To check for water leaks ........................................................................................................................................ 31

6.1 Preparing the installation site

6 | Unit installation

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.

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 "General safety precautions" chapter.

INFORMATION

The sound pressure level is less than 70dBA.

▪ 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 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.

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Installer reference guide

6 | Unit installation

≥50

≥30

(mm)

Install power cables at least 1 metre away from televisions or radios to prevent interference. Depending on the radio waves, a distance of 3 metres may NOT be sufficient.

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

the unit will not disturb anyone.

▪ 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.

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.

WARNING

▪ Spacing. Install the unit at least 1.8 m from the floor and keep the following

requirements in mind for distances from the walls and the ceiling:

6.2 Opening the indoor unit

6.2.1 To remove the front panel

Installer reference guide

1 Hold the front panel by the panel tabs on both sides and open it.

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2 Remove the front panel by sliding it to the left or the right and pulling it

a b

3 4

toward you.

Result: The front panel shaft on 1 side will be disconnected.

3 Disconnect the front panel shaft on the other side in the same manner.

6.2.2 To open the service cover

1 Remove 1 screw from the service cover.

2 Pull out the service cover horizontally away from the unit.

6 | Unit installation

a Front panel shaft

6.2.3 To remove the front grille

1 Remove the front panel to remove the air filter.

2 For class 50~71 remove the flap (horizontal blade). Push the blade on its left

side to the centre and unhook it. Push blade on its right side to centre to unhook it from shaft. Disconnect the 2 centre connection points.

a Service cover screw b Service cover

NOTICE

When closing the service cover, make sure that the tightening torque does NOT exceed 1.4(±0.2)N•m.

CAUTION

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

3 Remove 2 screws (class 15~42) or 3 screws (class 50~71) from the front grille.

4 Push down the 3 upper hooks marked with a symbol with 3 circles.

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Installer reference guide

6 | Unit installation

3×

a Upper hook

b Symbol with 3 circles

5 We recommend opening the flap before removing the front grille.

6 Place both hands under the centre of the front grille, push it up and then

toward you.

6.3 Mounting the indoor unit

In this chapter

6.3.1 To install the mounting plate ................................................................................................................................. 26

6.3.2 To drill a wall hole .................................................................................................................................................. 27

6.3.3 To remove the pipe port cover .............................................................................................................................. 28

6.3.1 To install the mounting plate

1 Install the mounting plate temporarily.

2 Level the mounting plate.

3 Mark the centres of the drilling points on the wall using a tape measure.

Position the end of tape measure at symbol " ".

4 Finish the installation by securing the mounting plate on the wall using

M4×25L screws (field supply).

Class 15~42 Class 50~71

Installer reference guide

INFORMATION

The removed pipe port cover can be kept in the mounting plate pocket.

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6 | Unit installation

169

279

377.5

778

295

44.5

160

44.5

120

293.5

170

(mm)

h g

bac

998

299

170

120.5

130

469

475

PIPING HOLE CENTER:170mm TO THE LEFT

(mm)

PIPING HOLE CENTER:170mm TO THE LEFT

A For class: 15~42

B For class: 50~71 a Recommended mounting plate fixing spots f Position for the tape measure at symbol " " b Pocket for the pipe port cover g Gas pipe end

c Tabs for placing a spirit level h Liquid pipe end

d Through-the-wall hole: e Drain hose position

Class 15~42 Ø65 mm Class 50~71 Ø80 mm

6.3.2 To drill a wall hole

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.

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1 Bore a 65mm (class 15~42) or 80mm (class 50~71) large feed-through hole in

2 Insert a wall embedded pipe into the hole.

3 Insert a wall cover into the wall pipe.

NOTICE

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

the wall with a downward slope towards the outside.

Installer reference guide

6 | Unit installation

Ø65/80

6.3.3 To remove the pipe port cover

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.

To connect the piping on right-side, right-bottom, left-side or left-bottom, the pipe port cover MUST be removed.

1 Cut off the pipe port cover from inside the front grille using a coping saw.

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

NOTICE

Do NOT use nippers to remove the pipe port cover, as this would damage the front grille.

6.4 Connecting the drain piping

In this chapter

6.4.1 General guidelines.................................................................................................................................................. 28

6.4.2 To connect the piping on right side, right-back, or right-bottom ......................................................................... 29

6.4.3 To connect the piping on left side, left-back, or left-bottom................................................................................ 30

6.4.4 To check for water leaks ........................................................................................................................................ 31

6.4.1 General guidelines

▪ Pipe length. Keep drain piping as short as possible.

▪ Pipe size. If drain hose extension or embedded drain piping is required, use

appropriate parts that match the hose front end.

Installer reference guide

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6 | Unit installation

Ø16

Ø18

b c

Ø16

a b c

Ø18

≥50

NOTICE

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

▪ Drain hose extension. To extend the drain hose, use a field supplied hose with

inner Ø16mm. Do NOT forget to use a heat insulation tube on the indoor section of the extension hose.

a Drain hose supplied with the indoor unit b Heat insulation tube (field supply) c Extension drain hose

▪ Rigid polyvinyl chloride pipe. When connecting a rigid polyvinyl chloride pipe

(nominal Ø13mm) directly to the drain hose as with embedded piping work, use a field supplied drain socket (nominal Ø13mm).

a Drain hose supplied with the indoor unit b Drain socket with nominal Ø13mm (field supply) c Rigid polyvinyl chloride pipe (field supply)

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

piping in the building.

1 Insert the drain hose in the drain pipe as shown in the following figure, so it

will NOT be pulled out of the drain pipe.

6.4.2 To connect the piping on right side, right-back, or right-bottom

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INFORMATION

The factory default is right-side piping. For left-side piping, remove the piping from the right side and install it on the left side.

Installer reference guide

6 | Unit installation

6.4.3 To connect the piping on left side, left-back, or left-bottom

1 Attach the drain hose with adhesive vinyl tape to the bottom of the

refrigerant pipes.

2 Wrap the drain hose and the refrigerant pipes together using insulation tape.

A Right-side piping B Right-bottom piping

C Right-back piping

a Remove the pipe port cover here for right side piping

b Remove the pipe port cover here for right-bottom piping

INFORMATION

The factory default is right-side piping. For left-side piping, remove the piping from the right side and install it on the left side.

1 Remove the insulation fixing screw on the right side and remove the drain

hose.

2 Remove the drain plug on the left side and attach it to the right side.

NOTICE

Do NOT apply lubricating oil (refrigerant oil) to the drain plug when inserting it. The drain plug may deteriorate and cause drain leakage from the plug.

a 4mm hexagonal wrench

3 Insert the drain hose on the left side and do not forget to tighten it with the

fixing screw; otherwise water leakage may occur.

a Insulation fixing screw

b Drain hose

4 Attach the drain hose to the refrigerant piping bottom side using adhesive

vinyl tape.

Installer reference guide

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6.4.4 To check for water leaks

1 Remove the air filters.

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

water leaks.

6 | Unit installation

A Left-side piping B Left-back piping C Left-bottom piping

a Remove the pipe port cover here for left-side piping

b Remove the pipe port cover here for left-bottom piping

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Installer reference guide

7 | Piping installation

7 Piping installation

In this chapter

7.1 Preparing refrigerant piping

7.1.1 Refrigerant piping requirements

7.1 Preparing refrigerant piping................................................................................................................................................... 32

7.1.1 Refrigerant piping requirements ........................................................................................................................... 32

7.1.2 Refrigerant piping insulation.................................................................................................................................. 33

7.2 Connecting the refrigerant piping.......................................................................................................................................... 33

7.2.1 About connecting the refrigerant piping ............................................................................................................... 33

7.2.2 Precautions when connecting the refrigerant piping............................................................................................ 34

7.2.3 Guidelines when connecting the refrigerant piping.............................................................................................. 35

7.2.4 Pipe bending guidelines ......................................................................................................................................... 35

7.2.5 To flare the pipe end .............................................................................................................................................. 35

7.2.6 To connect the refrigerant piping to the indoor unit ............................................................................................ 36

INFORMATION

Also read the precautions and requirements in the "General safety precautions" chapter.

▪ 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:

15~42 Ø6.4 Ø9.5

50~60 Ø6.4 Ø12.7

Refrigerant piping material

▪ Piping material: Phosphoric acid deoxidised seamless copper.

▪ Flare connections: Only use annealed material.

▪ Piping temper grade and thickness:

Outer diameter (Ø) Temper grade Thickness (t)

NOTICE

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

Class Pipe outer diameter (mm)

Liquid pipe Gas pipe

71 Ø6.4 Ø15.9

(a)

6.4mm (1/4") Annealed (O) ≥0.8mm

9.5mm (3/8")

12.7mm (1/2")

15.9mm (5/8")

Installer reference guide

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(a)

ØiØ

ØpØ

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.

7.1.2 Refrigerant piping insulation

▪ 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

7 | Piping installation

Pipe outer diameter (Øp) Insulation inner diameter

6.4mm (1/4") 8~10mm ≥10mm

9.5mm (3/8") 10~14mm ≥13mm

12.7mm (1/2") 14~16mm ≥13mm

15.9mm (5/8") 16~20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

Insulation thickness (t)

(Øi)

Make sure the outdoor and indoor unit are mounted.

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

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Installer reference guide

7 | Piping installation

7.2.2 Precautions when connecting the refrigerant piping

INFORMATION

Also read the precautions and requirements in the following chapters:

▪ General safety precautions ▪ Preparation

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).

Unit Installation period Protection method

Outdoor unit >1month Pinch the pipe

<1month Pinch or tape the pipe

Installer reference guide

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.

CTXM15+FTXM20~42+ATXM20~35R2/5V1B + FTXM50~71R2V1B +

Daikin room air conditioner

ATXM50R2V1B

4P518023-8G – 2020.06

7.2.3 Guidelines when connecting the refrigerant piping

0.4~0.8

±2

45°

90°

±2

ØA

a b

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.

▪ 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)

7 | Piping installation

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

Ø15.9 62~75 19.3~19.7

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.

CTXM15+FTXM20~42+ATXM20~35R2/5V1B + FTXM50~71R2V1B + ATXM50R2V1B Daikin room air conditioner 4P518023-8G – 2020.06

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.

Installer reference guide

7 | Piping installation

a b

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

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.

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, interconnection cable and drain hose on the

indoor unit as follows:

a Gas pipe

b Gas pipe insulation

c Interconnection cable

d Liquid pipe

e Liquid pipe insulation

f Finishing tape

g Drain hose

NOTICE

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

Installer reference guide

CTXM15+FTXM20~42+ATXM20~35R2/5V1B + FTXM50~71R2V1B +

Daikin room air conditioner

ATXM50R2V1B

4P518023-8G – 2020.06

8 Electrical installation

In this chapter

8.1 About connecting the electrical wiring .................................................................................................................................. 37

8.1.1 Precautions when connecting the electrical wiring .............................................................................................. 37

8.1.2 Guidelines when connecting the electrical wiring ................................................................................................ 38

8.1.3 Specifications of standard wiring components ..................................................................................................... 39

8.2 To connect the electrical wiring to the indoor unit ............................................................................................................... 39

8.1 About connecting the electrical wiring

Before connecting the electrical wiring

Make sure:

▪ The refrigerant piping is connected and checked

▪ The water piping is connected

Typical workflow

8 | Electrical installation

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

INFORMATION

Also read the precautions and requirements in the "General safety precautions" chapter.

INFORMATION

Also read "8.1.3Specifications of standard wiring components"[439].

CTXM15+FTXM20~42+ATXM20~35R2/5V1B + FTXM50~71R2V1B + ATXM50R2V1B Daikin room air conditioner 4P518023-8G – 2020.06

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

8 | Electrical installation

b a