Daikin RXF25E5V1B Bruksanvisning

Daikin Ikke kategorisert RXF25E5V1B

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Installer reference guide

R32 split series

RXF20E5V1B

RXF25E5V1B

RXF35E5V1B

RXF42E5V1B

ARXF20E5V1B

ARXF25E5V1B

ARXF35E5V1B

ARXF42E5V1B

Table of contents

Installer reference guide

RXF20~42E5V1B+ARXF20~42E5V1B

R32 split series

4P519439-21V – 2022.10

Table of contents

1 About the documentation 4

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

1.2 Installer reference guide at a glance .............................................................................................................................. 5

2 General safety precautions 6

2.1 About the documentation .............................................................................................................................................. 6

2.1.1 Meaning of warnings and symbols ................................................................................................................ 6

2.2 For the installer............................................................................................................................................................... 7

2.2.1 General ........................................................................................................................................................... 7

2.2.2 Installation site ............................................................................................................................................... 8

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

2.2.4 Electrical ......................................................................................................................................................... 13

3 Specific installer safety instructions 16

4 About the box 21

4.1 Overview: About the box ................................................................................................................................................ 21

4.2 Outdoor unit ................................................................................................................................................................... 21

4.2.1 To unpack the outdoor unit ........................................................................................................................... 21

4.2.2 To remove the accessories from the outdoor unit........................................................................................ 22

5 About the units and options 24

5.1 Overview: About the units and options.......................................................................................................................... 24

5.2 Identification ................................................................................................................................................................... 24

5.2.1 Identification label: Outdoor unit .................................................................................................................. 24

6 Unit installation 25

6.1 Preparing the installation site......................................................................................................................................... 25

6.1.1 Installation site requirements of the outdoor unit........................................................................................ 26

6.1.2 Additional installation site requirements of the outdoor unit in cold climates............................................ 28

6.2 Opening the units ........................................................................................................................................................... 29

6.2.1 About opening the units................................................................................................................................. 29

6.2.2 To open the outdoor unit............................................................................................................................... 29

6.3 Mounting the outdoor unit............................................................................................................................................. 29

6.3.1 About mounting the outdoor unit ................................................................................................................. 29

6.3.2 Precautions when mounting the outdoor unit.............................................................................................. 30

6.3.3 To provide the installation structure ............................................................................................................. 30

6.3.4 To install the outdoor unit ............................................................................................................................. 30

6.3.5 To provide drainage........................................................................................................................................ 31

6.3.6 To prevent the outdoor unit from falling over .............................................................................................. 31

7 Piping installation 33

7.1 Preparing refrigerant piping ........................................................................................................................................... 33

7.1.1 Refrigerant piping requirements.................................................................................................................... 33

7.1.2 Refrigerant piping length and height difference ........................................................................................... 33

7.1.3 Refrigerant piping insulation.......................................................................................................................... 34

7.2 Connecting the refrigerant piping .................................................................................................................................. 34

7.2.1 About connecting the refrigerant piping ....................................................................................................... 34

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

7.2.3 Guidelines when connecting the refrigerant piping...................................................................................... 36

7.2.4 Pipe bending guidelines ................................................................................................................................. 36

7.2.5 To flare the pipe end ...................................................................................................................................... 36

7.2.6 Using the stop valve and service port............................................................................................................ 37

7.2.7 To connect the refrigerant piping to the outdoor unit ................................................................................. 38

7.3 Checking the refrigerant piping...................................................................................................................................... 39

7.3.1 About checking the refrigerant piping........................................................................................................... 39

7.3.2 Precautions when checking the refrigerant piping........................................................................................ 39

7.3.3 To check for leaks ........................................................................................................................................... 40

7.3.4 To perform vacuum drying............................................................................................................................. 40

7.4 Charging refrigerant........................................................................................................................................................ 41

7.4.1 About charging refrigerant............................................................................................................................. 41

7.4.2 About the refrigerant ..................................................................................................................................... 42

7.4.3 To determine the additional refrigerant amount.......................................................................................... 43

7.4.4 To determine the complete recharge amount.............................................................................................. 43

7.4.5 To charge additional refrigerant .................................................................................................................... 44

7.4.6 To fix the fluorinated greenhouse gases label............................................................................................... 44

Table of contents

Installer reference guide

RXF20~42E5V1B+ARXF20~42E5V1B

R32 split series

4P519439-21V – 2022.10

8 Electrical installation 45

8.1 Preparing electrical wiring .............................................................................................................................................. 45

8.1.1 About preparing electrical wiring................................................................................................................... 45

8.2 Connecting the electrical wiring..................................................................................................................................... 46

8.2.1 About connecting the electrical wiring.......................................................................................................... 46

8.2.2 Precautions when connecting the electrical wiring....................................................................................... 46

8.2.3 Guidelines when connecting the electrical wiring......................................................................................... 47

8.2.4 Specifications of standard wiring components.............................................................................................. 48

8.2.5 To connect the electrical wiring to the outdoor unit .................................................................................... 48

9 Finishing the outdoor unit installation 50

9.1 To finish the outdoor unit installation............................................................................................................................ 50

9.2 To close the outdoor unit ............................................................................................................................................... 50

10 Commissioning 51

10.1 Overview: Commissioning .............................................................................................................................................. 51

10.2 Precautions when commissioning.................................................................................................................................. 51

10.3 Checklist before commissioning..................................................................................................................................... 51

10.4 Checklist during commissioning ..................................................................................................................................... 52

10.5 To perform a test run...................................................................................................................................................... 52

10.6 Starting up the outdoor unit........................................................................................................................................... 53

11 Hand-over to the user 54

12 Maintenance and service 55

12.1 Overview: Maintenance and service .............................................................................................................................. 55

12.2 Maintenance safety precautions.................................................................................................................................... 55

12.3 Checklist for yearly maintenance of the outdoor unit................................................................................................... 55

13 Troubleshooting 57

13.1 Overview: Troubleshooting ............................................................................................................................................ 57

13.2 Precautions when troubleshooting ................................................................................................................................ 57

13.3 Solving problems based on symptoms........................................................................................................................... 57

13.3.1 Symptom: Indoor units fall, vibrate or make noise ....................................................................................... 57

13.3.2 Symptom: The unit is NOT heating or cooling as expected........................................................................... 58

13.3.3 Symptom: Water leakage............................................................................................................................... 58

13.3.4 Symptom: Electrical leakage .......................................................................................................................... 58

13.3.5 Symptom: Unit does NOT function or burn damage..................................................................................... 58

14 Disposal 59

14.1 Overview: Disposal.......................................................................................................................................................... 59

14.2 To pump down ................................................................................................................................................................ 59

14.3 To start and stop forced cooling..................................................................................................................................... 60

14.3.1 To start and stop forced cooling using the indoor unit ON/OFF switch ....................................................... 60

14.3.2 To start and stop forced cooling using the indoor unit user interface ......................................................... 60

15 Technical data 61

15.1 Wiring diagram................................................................................................................................................................ 62

16 Glossary 63

1 | About the documentation

Installer reference guide

RXF20~42E5V1B+ARXF20~42E5V1B

R32 split series

4P519439-21V – 2022.10

1 About the documentation

1.1 About this document

WARNING

Make sure installation, servicing, maintenance, repair and applied materials follow

the instructions from Daikin (including all documents listed in “Documentation set”)

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.

INFORMATION

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

for future reference.

Target audience

Authorised installers

INFORMATION

This document only describes installation instructions specific to the outdoor unit.

For installation of the indoor unit (mounting the indoor unit, connecting the

refrigerant piping to the indoor unit, connecting the electrical wiring to the indoor

unit …), see the installation manual of the indoor unit.

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 outdoor unit)

▪ Outdoor unit installation manual:

- Installation instructions

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

▪ Installer reference guide:

- Preparation of the installation, reference data,…

- Format: Digital files on https://www.daikin.eu. Use the search function to

find your model.

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).

1 | About the documentation

Installer reference guide

RXF20~42E5V1B+ARXF20~42E5V1B

R32 split series

4P519439-21V – 2022.10

1.2 Installer reference guide at a glance

Chapter Description

General safety precautions Safety instructions that you MUST read before

installing

About the documentation What documentation exists for the installer

About the box How to unpack the units and remove their

accessories

About the unit ▪ System layout

▪ Operation range

Preparation What to do and know before going on‑site

Installation What to do and know to install the system

Configuration What to do and know to configure the system

after it is installed

Commissioning What to do and know to commission the system

after it is configured

Hand‑over to the user What to give and explain to the user

Disposal How to dispose of the system

Technical data Specifications of the system

Glossary Definition of terms

2 | General safety precautions

Installer reference guide

RXF20~42E5V1B+ARXF20~42E5V1B

R32 split series

4P519439-21V – 2022.10

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.

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.

NOTICE

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

INFORMATION

Indicates useful tips or additional information.

Symbols used on the unit:

2 | General safety precautions

Installer reference guide

RXF20~42E5V1B+ARXF20~42E5V1B

R32 split series

4P519439-21V – 2022.10

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.

Symbols used in the documentation:

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).

WARNING

Tear apart and throw away plastic packaging bags so that nobody, especially

children, can play with them. Possible risk: suffocation.

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.

2 | General safety precautions

Installer reference guide

RXF20~42E5V1B+ARXF20~42E5V1B

R32 split series

4P519439-21V – 2022.10

CAUTION

Wear adequate personal protective equipment (protective gloves, safety glasses,…)

when installing, maintaining or servicing the system.

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,…

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.

2.2.2 Installation site

▪ 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.

Instructions for equipment using R32 refrigerant

WARNING: MILDLY FLAMMABLE MATERIAL

The refrigerant inside this unit is mildly flammable.

2 | General safety precautions

Installer reference guide

RXF20~42E5V1B+ARXF20~42E5V1B

R32 split series

4P519439-21V – 2022.10

WARNING

▪ Do NOT pierce or burn refrigerant cycle parts.

▪ Do NOT use cleaning materials or means to accelerate the defrosting process

other than those recommended by the manufacturer.

▪ Be aware that the refrigerant inside the system is odourless.

WARNING

The appliance shall be stored so as to prevent mechanical damage and in a well-

ventilated 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 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.

WARNING

▪ Take precautions to avoid excessive vibration or pulsation to refrigeration piping.

▪ Protect the protection devices, piping and fittings as much as possible against

adverse environmental effects.

▪ Provide space for expansion and contraction of long runs of piping.

▪ Design and install piping in refrigerating systems such as to minimise the

likelihood of hydraulic shock damaging the system.

▪ Mount the indoor equipment and pipes securely and protect them to avoid

accidental rupture of equipment or pipes in case of events such as moving

furniture or reconstruction activities.

CAUTION

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

leaks.

NOTICE

▪ Do NOT re-use joints and copper gaskets which have been used already.

▪ Joints made in installation between parts of refrigerant system shall be accessible

for maintenance purposes.

2 | General safety precautions

Installer reference guide

RXF20~42E5V1B+ARXF20~42E5V1B

R32 split series

4P519439-21V – 2022.10

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 (m

). 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)

NOTICE

▪ Protect pipework from physical damage.

▪ Keep the pipework installation to a minimum.

To determine the minimum floor area

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

charge + additional refrigerant amount charged).

Contains fluorinated greenhouse gases

tCO

1000

GWP × kg

GWP: xxx

R32

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, 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

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

2 | General safety precautions

Installer reference guide

RXF20~42E5V1B+ARXF20~42E5V1B

R32 split series

4P519439-21V – 2022.10

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

560

570

580

590

600

610

620

630

640

650

660

670

680

690

700

710

720

730

740

750

760

770

1.843

9.55

2.21.8

2.4 2.8 3.2 3.6 4 4.4 4.8 5.2 5.6 6 6.4 6.8 7.2 7.6 8 8.4 8.8 9.22

2.6 3 3.4 3.8 4.2

4.6

5 5.4 5.8 6.2 6.6 7 7.4 7.8 8.2 8.6 9 9.4

Floor-standing unit

(c)

Wall-mounted unit

(b)

Ceiling-mounted unit

(a)

m [kg]

min

]

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

4.4 165

m (kg)

min

)

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

8 40.5

8.2 42.6

8.4 44.7

8.6 46.8

8.8 49.0

9 51.3

9.2 53.6

9.4 55.9

9.55 57.7

8 60.5

8.2 63.6

8.4 66.7

8.6 69.9

8.8 73.2

9 76.6

9.2 80.0

9.4 83.6

9.55 86.2

8 545

8.2 572

8.4 601

8.6 629

8.8 659

9 689

9.2 720

9.4 752

9.55 776

Wall-mounted

unit

(b)

m (kg)

min

)

Floor-standing

unit

(c)

m (kg)

min

)

m Total refrigerant charge in the system

min

Minimum floor area

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

(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.

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: Self-

combustion 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

During tests, NEVER pressurise the product with a pressure higher than the

maximum allowable pressure (as indicated on the nameplate of the unit).

2 | General safety precautions

Installer reference guide

RXF20~42E5V1B+ARXF20~42E5V1B

R32 split series

4P519439-21V – 2022.10

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.

WARNING

ALWAYS recover the refrigerant. Do NOT release them directly into the environment.

Use a vacuum pump to evacuate the installation.

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.

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.

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.

NOTICE

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

to perform a gas leak detection.

▪ 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:

If Then

A siphon tube is present

(i.e., the cylinder is marked with "Liquid

filling siphon attached")

Charge with the cylinder upright.

2 | General safety precautions

Installer reference guide

RXF20~42E5V1B+ARXF20~42E5V1B

R32 split series

4P519439-21V – 2022.10

If Then

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 Electrical

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.

2 | General safety precautions

Installer reference guide

RXF20~42E5V1B+ARXF20~42E5V1B

R32 split series

4P519439-21V – 2022.10

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.

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.

2 | General safety precautions

Installer reference guide

RXF20~42E5V1B+ARXF20~42E5V1B

R32 split series

4P519439-21V – 2022.10

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.

3 | Specific installer safety instructions

Installer reference guide

RXF20~42E5V1B+ARXF20~42E5V1B

R32 split series

4P519439-21V – 2022.10

3 Specific installer safety instructions

Always observe the following safety instructions and regulations.

Unit installation (see

"6Unit installation"[

25]

)

WARNING

Installation shall be done by an installer, the choice of materials and installation shall

comply with the applicable legislation. In Europe, EN378 is the applicable standard.

Installation site (see

"6.1Preparing the installation site"[

25]

)

CAUTION

▪ Check if the installation location can support the unit's weight. Poor installation is

hazardous. It can also cause vibrations or unusual operating noise.

▪ Provide sufficient service space.

▪ Do NOT install the unit so that it is in contact with a ceiling or a wall, as this may

cause vibrations.

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).

Connecting the refrigerant piping (see

"7.2Connecting the refrigerant

piping"[

34]

)

CAUTION

▪ No brazing or welding on site for units with R32 refrigerant charge during

shipment.

▪ During installation of the refrigeration system, joining of parts with at least one

part charged shall be performed taking into account the following requirements:

inside occupied spaces non-permanent joints are NOT allowed for R32 refrigerant

except for site made joints directly connecting the indoor unit to piping. Site

made joints directly connecting piping to indoor units shall be of non-permanent

type.

NOTICE

▪ 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 (FW68DA).

▪ Do NOT reuse joints.

NOTICE

▪ Do NOT use mineral oil on flared part.

▪ Do NOT reuse piping from previous installations.

▪ NEVER install a drier to this R32 unit to guarantee its lifetime. The drying material

may dissolve and damage the system.

3 | Specific installer safety instructions

Installer reference guide

RXF20~42E5V1B+ARXF20~42E5V1B

R32 split series

4P519439-21V – 2022.10

WARNING

Connect the refrigerant piping securely before running the compressor. If the

refrigerant piping is NOT connected and the stop valve is open when the compressor

is run, air will be sucked in. This will cause abnormal pressure in the refrigeration

cycle, which may result in equipment damage and even injury.

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.

CAUTION

Do NOT open the valves before flaring is complete. This would cause refrigerant gas

leakage.

DANGER: RISK OF EXPLOSION

Do NOT open the stop valves before the vacuum drying is finished.

Charging refrigerant (see

"7.4Charging refrigerant"[

41]

)

WARNING

▪ The refrigerant inside the unit is mildly flammable, but normally does NOT leak. If

the refrigerant leaks in the room and comes in contact with fire from a burner, a

heater, or a cooker, this may result in fire, or the formation of a harmful gas.

▪ Turn OFF any combustible heating devices, ventilate the room, and contact the

dealer where you purchased the unit.

▪ Do NOT use the unit until a service person confirms that the part from which the

refrigerant leaked has been repaired.

WARNING

▪ Only use R32 as refrigerant. Other substances may cause explosions and

accidents.

▪ R32 contains fluorinated greenhouse gases. Its global warming potential (GWP)

value is 675. Do NOT vent these gases into the atmosphere.

▪ When charging refrigerant, ALWAYS use protective gloves and safety glasses.

NOTICE

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

refrigerant.

WARNING

NEVER directly touch any accidental leaking refrigerant. This could result in severe

wounds caused by frostbite.

Electrical installation (see

"8Electrical installation"[

45]

)

WARNING

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

3 | Specific installer safety instructions

Installer reference guide

RXF20~42E5V1B+ARXF20~42E5V1B

R32 split series

4P519439-21V – 2022.10

WARNING

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

with the applicable national wiring regulation.

▪ 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, 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 provides 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.

DANGER: RISK OF ELECTROCUTION

All electrical parts (including thermistors) are powered by the power supply. Do NOT

touch them with bare hands.

3 | Specific installer safety instructions

Installer reference guide

RXF20~42E5V1B+ARXF20~42E5V1B

R32 split series

4P519439-21V – 2022.10

DANGER: RISK OF ELECTROCUTION

▪ Use this compressor on a grounded system only.

▪ Turn the power off before servicing the compressor.

▪ Reattach the switch box cover and service lid after servicing.

CAUTION

ALWAYS wear safety glasses and protective gloves.

DANGER: RISK OF EXPLOSION

▪ Use a pipe cutter to remove the compressor.

▪ Do NOT use the brazing torch.

▪ Use approved refrigerants and lubricants only.

DANGER: RISK OF BURNING/SCALDING

Do NOT touch the compressor with bare hands.

Troubleshooting (see

"13Troubleshooting"[

57]

)

DANGER: RISK OF ELECTROCUTION

DANGER: RISK OF BURNING/SCALDING

WARNING

▪ When carrying out an inspection on the switch box of the unit, ALWAYS make

sure that the unit is disconnected from the mains. Turn off the respective circuit

breaker.

▪ When a safety device was activated, stop the unit and find out why the safety

device was activated before resetting it. NEVER shunt safety devices or change

their values to a value other than the factory default setting. If you are unable to

find the cause of the problem, call your dealer.

WARNING

Prevent hazards due to inadvertent resetting of the thermal cut-out: power to this

appliance MUST NOT be supplied through an external switching device, such as a

timer, or connected to a circuit that is regularly turned ON and OFF by the utility.

DANGER: RISK OF ELECTROCUTION

▪ When the unit is NOT operating, the LEDs on the PCB are turned OFF in order to

save power.

▪ Even when the LEDs are OFF, the terminal block and the PCB may be powered.

4 | About the box

Installer reference guide

RXF20~42E5V1B+ARXF20~42E5V1B

R32 split series

4P519439-21V – 2022.10

4 About the box

4.1 Overview: About the box

This chapter describes what you have to do after the box with the outdoor unit is

delivered on-site.

Keep the following in mind:

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

damage or missing parts 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 in advance the path along which you want to bring the unit to its final

installation position.

4.2 Outdoor unit

4.2.1 To unpack the outdoor unit

4 | About the box

Installer reference guide

RXF20~42E5V1B+ARXF20~42E5V1B

R32 split series

4P519439-21V – 2022.10

WARNING

Make sure installation, servicing, maintenance and repair comply with instructions

from Daikin and with applicable legislation and are executed ONLY by authorised

persons.

4.2.2 To remove the accessories from the outdoor unit

1 Lift the outdoor unit.

CAUTION

ONLY handle the outdoor unit as follows:

2 Remove the accessories at the bottom of the package.

4 | About the box

Installer reference guide

RXF20~42E5V1B+ARXF20~42E5V1B

R32 split series

4P519439-21V – 2022.10

b ec d

1×

1× 1× 1× 1×

a General safety precautions

b Outdoor unit installation manual

c Fluorinated greenhouse gases label

d Multilingual fluorinated greenhouse gases label

e Drain plug (located on the bottom of the packing case)

5 | About the units and options

Installer reference guide

RXF20~42E5V1B+ARXF20~42E5V1B

R32 split series

4P519439-21V – 2022.10

5 About the units and options

5.1 Overview: About the units and options

This chapter contains information about:

▪ Identification of the outdoor unit

5.2 Identification

NOTICE

When installing or servicing several units at the same time, make sure NOT to switch

the service panels between different models.

5.2.1 Identification label: Outdoor unit

Location

6 | Unit installation

Installer reference guide

RXF20~42E5V1B+ARXF20~42E5V1B

R32 split series

4P519439-21V – 2022.10

6 Unit installation

In this chapter

6.1 Preparing the installation site ................................................................................................................................................ 25

6.1.1 Installation site requirements of the outdoor unit ............................................................................................... 26

6.1.2 Additional installation site requirements of the outdoor unit in cold climates ................................................... 28

6.2 Opening the units ................................................................................................................................................................... 29

6.2.1 About opening the units ........................................................................................................................................ 29

6.2.2 To open the outdoor unit ...................................................................................................................................... 29

6.3 Mounting the outdoor unit .................................................................................................................................................... 29

6.3.1 About mounting the outdoor unit ......................................................................................................................... 29

6.3.2 Precautions when mounting the outdoor unit...................................................................................................... 30

6.3.3 To provide the installation structure ..................................................................................................................... 30

6.3.4 To install the outdoor unit ..................................................................................................................................... 30

6.3.5 To provide drainage ............................................................................................................................................... 31

6.3.6 To prevent the outdoor unit from falling over ...................................................................................................... 31

6.1 Preparing the installation site

Choose an installation location with sufficient space to transport the unit in and

out of the 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.

CAUTION

▪ Check if the installation location can support the unit's weight. Poor installation is

hazardous. It can also cause vibrations or unusual operating noise.

▪ Provide sufficient service space.

▪ Do NOT install the unit so that it is in contact with a ceiling or a wall, as this may

cause vibrations.

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

the unit will not disturb anyone and the location is selected according the

applicable legislation.

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

▪ Avoid areas where flammable gas or product might leak.

▪ Install units, power cables and communication wiring at least 3 m away from

televisions or radios to prevent interference. Depending on the radio waves, a

distance of 3m may not be sufficient.

WARNING

Do NOT place objects below the indoor and/or outdoor unit that may get wet.

Otherwise condensation on the unit or refrigerant pipes, air filter dirt or drain

blockage may cause dripping, and objects under the unit may get dirty or damaged.

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 | Unit installation

Installer reference guide

RXF20~42E5V1B+ARXF20~42E5V1B

R32 split series

4P519439-21V – 2022.10

WARNING

Make sure installation, servicing, maintenance and repair comply with instructions

from Daikin and with applicable legislation and are executed ONLY by authorised

persons.

6.1.1 Installation site requirements of the outdoor unit

INFORMATION

Also read the following requirements:

▪ General installation site requirements. See the "General safety precautions"

chapter.

▪ Refrigerant piping requirements (length, height difference). See further in this

"Preparation" chapter.

Mind the following spacing guidelines:

≤1200

>150

>50

>300

(mm)(mm)

a Air outlet

b Air inlet

NOTICE

▪ Do NOT stack the units on each other.

▪ Do NOT hang the unit on a ceiling.

Strong winds (≥18km/h) blowing against the outdoor unit’s air outlet causes short

circuit (suction of discharge air). This may result in:

▪ deterioration of the operational capacity;

▪ frequent frost acceleration in heating operation;

▪ disruption of operation due to decrease of low pressure or increase of high

pressure;

▪ a broken fan (if a strong wind blows continuously on the fan, it may start rotating

very fast, until it breaks).

It is recommended to install a baffle plate when the air outlet is exposed to wind.

It is recommended to install the outdoor unit with the air inlet facing the wall and

NOT directly exposed to the wind.

6 | Unit installation

Installer reference guide

RXF20~42E5V1B+ARXF20~42E5V1B

R32 split series

4P519439-21V – 2022.10

a Baffle plate

b Prevailing wind direction

c Air outlet

Do NOT install the unit in the following places:

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

cause no trouble.

Note: If the sound is measured under actual installation conditions, the

measured value might be higher than the sound pressure level mentioned in

Sound spectrum in the data book due to environmental noise and sound

reflections.

INFORMATION

The sound pressure level is less than 70dBA.

▪ 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

Seaside installation. Make sure the outdoor unit is NOT directly exposed to sea

winds. This is to prevent corrosion caused by high levels of salt in the air, which

might shorten the life of the unit.

Install the outdoor unit away from direct sea winds.

Example: Behind the building.

If the outdoor unit is exposed to direct sea winds, install a windbreaker.

▪ Height of windbreaker≥1.5×height of outdoor unit

▪ Mind the service space requirements when installing the windbreaker.

6 | Unit installation

Installer reference guide

RXF20~42E5V1B+ARXF20~42E5V1B

R32 split series

4P519439-21V – 2022.10

a Sea wind

b Building

c Outdoor unit

d Windbreaker

The outdoor unit is designed for outdoor installation only, and for ambient

temperatures ranging from –10 to 46°C in cooling mode and from –15 to 24°C in

heating mode. Unless otherwise specified in the operation manual of the

connected indoor unit.

6.1.2 Additional installation site requirements of the outdoor unit in cold climates

Protect the outdoor unit against direct snowfall and take care that the outdoor unit

is NEVER snowed up.

a Snow cover or shed

b Pedestal

c Prevailing wind direction

d Air outlet

In any case, provide at least 300 mm of free space below the unit. Additionally,

make sure the unit is positioned at least 100 mm above the maximum expected

level of snow. See "6.3Mounting the outdoor unit"[429] for more details.

In heavy snowfall areas it is very important to select an installation site where the

snow will NOT affect the unit. If lateral snowfall is possible, make sure that the heat

exchanger coil is NOT affected by the snow. If necessary, install a snow cover or

shed and a pedestal.

6 | Unit installation

Installer reference guide

RXF20~42E5V1B+ARXF20~42E5V1B

R32 split series

4P519439-21V – 2022.10

6.2 Opening the units

6.2.1 About opening the units

At certain times, you have to open the unit. Example:

▪ When connecting the refrigerant piping

▪ When connecting the electrical wiring

▪ When maintaining or servicing the unit

DANGER: RISK OF ELECTROCUTION

Do NOT leave the unit unattended when the service cover is removed.

6.2.2 To open the outdoor unit

DANGER: RISK OF ELECTROCUTION

DANGER: RISK OF BURNING/SCALDING

1×

6.3 Mounting the outdoor unit

6.3.1 About mounting the outdoor unit

When

The outdoor and indoor unit must be mounted before the refrigerant piping can be

connected.

Typical workflow

Mounting the outdoor unit typically consists of the following stages:

1 Providing the installation structure.

2 Installing the outdoor unit.

3 Providing drainage.

4 Preventing the unit from falling over.

5 Protecting the unit against snow and wind by installing a snow cover and baffle

plates. See "6.1Preparing the installation site"[425].

6 | Unit installation

Installer reference guide

RXF20~42E5V1B+ARXF20~42E5V1B

R32 split series

4P519439-21V – 2022.10

6.3.2 Precautions when mounting the outdoor unit

INFORMATION

Also read the precautions and requirements in the following chapters:

▪ General safety precautions

▪ Preparation

6.3.3 To provide the installation structure

Check the strength and level of the installation ground so that the unit will not

cause any operating vibration or noise.

Fix the unit securely by means of foundation bolts in accordance with the

foundation drawing.

Prepare 4 sets of M8 or M10 anchor bolts, nuts and washers (field supply).

20 mm

300

470

192

(mm)

192

a 100mm above expected level of snow

6.3.4 To install the outdoor unit

4× M8/M10

6 | Unit installation

Installer reference guide

RXF20~42E5V1B+ARXF20~42E5V1B

R32 split series

4P519439-21V – 2022.10

6.3.5 To provide drainage

▪ Make sure that condensation water can be evacuated properly.

▪ Install the unit on a base to make sure that there is proper drainage in order to

avoid ice accumulation.

▪ Prepare a water drainage channel around the foundation to drain waste water

away from the unit.

▪ Avoid drain water flowing over the footpath, so that it does NOT become slippery

in case of ambient freezing temperatures.

▪ If you install the unit on a frame, install a waterproof plate within 150mm of the

bottom side of the unit in order to prevent water from getting into the unit and

to avoid drain water dripping (see the following figure).

NOTICE

If the unit is installed in a cold climate, take adequate measures so that the

evacuated condensate CANNOT freeze.

NOTICE

If the drain holes of the outdoor unit are blocked up by a mounting base or floor

surface, place additional foot bases ≤30mm under the outdoor unit's feet.

INFORMATION

For information on the available options, contact your dealer.

1 Use a drain plug for drainage.

2 Use a Ø16mm hose (field supply).

a Drain port

b Bottom frame

c Drain plug

d Hose (field supply)

6.3.6 To prevent the outdoor unit from falling over

In case the unit is installed in places where strong wind can tilt the unit, take

following measure:

1 Prepare 2 cables as indicated in the following illustration (field supply).

2 Place the 2 cables over the outdoor unit.

6 | Unit installation

Installer reference guide

RXF20~42E5V1B+ARXF20~42E5V1B

R32 split series

4P519439-21V – 2022.10

3 Insert a rubber sheet between the cables and the outdoor unit to prevent the

cables from scratching the paint (field supply).

4 Attach the ends of the cables.

5 Tighten the cables.

7 | Piping installation

Installer reference guide

RXF20~42E5V1B+ARXF20~42E5V1B

R32 split series

4P519439-21V – 2022.10

7 Piping installation

In this chapter

7.1 Preparing refrigerant piping................................................................................................................................................... 33

7.1.1 Refrigerant piping requirements ........................................................................................................................... 33

7.1.2 Refrigerant piping length and height difference ................................................................................................... 33

7.1.3 Refrigerant piping insulation.................................................................................................................................. 34

7.2 Connecting the refrigerant piping.......................................................................................................................................... 34

7.2.1 About connecting the refrigerant piping............................................................................................................... 34

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

7.2.3 Guidelines when connecting the refrigerant piping.............................................................................................. 36

7.2.4 Pipe bending guidelines ......................................................................................................................................... 36

7.2.5 To flare the pipe end.............................................................................................................................................. 36

7.2.6 Using the stop valve and service port.................................................................................................................... 37

7.2.7 To connect the refrigerant piping to the outdoor unit ......................................................................................... 38

7.3 Checking the refrigerant piping.............................................................................................................................................. 39

7.3.1 About checking the refrigerant piping................................................................................................................... 39

7.3.2 Precautions when checking the refrigerant piping ............................................................................................... 39

7.3.3 To check for leaks................................................................................................................................................... 40

7.3.4 To perform vacuum drying .................................................................................................................................... 40

7.4 Charging refrigerant ............................................................................................................................................................... 41

7.4.1 About charging refrigerant .................................................................................................................................... 41

7.4.2 About the refrigerant ............................................................................................................................................. 42

7.4.3 To determine the additional refrigerant amount.................................................................................................. 43

7.4.4 To determine the complete recharge amount...................................................................................................... 43

7.4.5 To charge additional refrigerant............................................................................................................................ 44

7.4.6 To fix the fluorinated greenhouse gases label....................................................................................................... 44

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6].

▪ Piping material: phosphoric acid deoxidised seamless copper

▪ Piping diameter:

Liquid piping Ø6.4mm (1/4")

Gas piping Ø9.5mm (3/8")

▪ 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") Annealed (O)

(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.

7.1.2 Refrigerant piping length and height difference

What? Distance

Maximum allowable pipe length 20m

7 | Piping installation

Installer reference guide

RXF20~42E5V1B+ARXF20~42E5V1B

R32 split series

4P519439-21V – 2022.10

What? Distance

Minimum allowable pipe length 1.5m

Maximum allowable height difference 12m

7.1.3 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

Pipe outer diameter (Ø

) Insulation inner diameter

(Ø

)

Insulation thickness (t)

6.4mm (1/4") 8~10mm ≥10mm

9.5mm (3/8") 12~15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.

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

DANGER: RISK OF BURNING/SCALDING

7 | Piping installation

Installer reference guide

RXF20~42E5V1B+ARXF20~42E5V1B

R32 split series

4P519439-21V – 2022.10

NOTICE

▪ Use the flare nut fixed to the main unit.

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

refrigeration oil for R32 (Example: FW68DA).

▪ Do NOT reuse joints.

NOTICE

▪ Do NOT use mineral oil on flared part.

▪ Do NOT reuse piping from previous installations.

▪ 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.

▪ Do NOT leave pipes unattended at the site. If the installation is NOT done within 1

day, 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

Indoor unit Regardless of the period

NOTICE

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.

WARNING

Connect the refrigerant piping securely before running the compressor. If the

refrigerant piping is NOT connected and the stop valve is open when the compressor

is run, air will be sucked in. This will cause abnormal pressure in the refrigeration

cycle, which may result in equipment damage and even injury.

7 | Piping installation

Installer reference guide

RXF20~42E5V1B+ARXF20~42E5V1B

R32 split series

4P519439-21V – 2022.10

7.2.3 Guidelines when connecting the refrigerant piping

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)

Flare dimensions

(A) (mm)

Flare shape (mm)

Ø6.4 15~17 8.7~9.1

0.4~0.8

±2

45°

90°

±2

ØA

Ø9.5 33~39 12.8~13.2

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

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.

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.

a b

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.

7 | Piping installation

Installer reference guide

RXF20~42E5V1B+ARXF20~42E5V1B

R32 split series

4P519439-21V – 2022.10

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

Flare tool for R32

(clutch type)

Conventional flare tool

Clutch type

(Ridgid-type)

Wing nut type

(Imperial-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 b

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 Using the stop valve and service port

CAUTION

Do NOT open the valves before flaring is complete. This would cause refrigerant gas

leakage.

To handle the stop valve

Take the following guidelines into account:

▪ The stop valves are factory closed.

▪ The following figure shows the stop valve parts required when handling the

valve.

a Service port and service port cap

b Valve stem

c Field piping connection

d Stem cap

▪ Keep both stop valves open during operation.

▪ Do NOT apply excessive force to the valve stem. Doing so may break the valve

body.

▪ ALWAYS make sure to secure the stop valve with a spanner, then loosen or

tighten the flare nut with a torque wrench. Do NOT place the spanner on the

stem cap, as this could cause a refrigerant leak.

7 | Piping installation

Installer reference guide

RXF20~42E5V1B+ARXF20~42E5V1B

R32 split series

4P519439-21V – 2022.10

a Spanner

b Torque wrench

▪ When it is expected that the operating pressure will be low (e.g. when cooling

will be performed while the outside air temperature is low), sufficiently seal the

flare nut in the stop valve on the gas line with silicon sealant to prevent freezing.

Silicon sealant, make sure there is no gap.

To open/close the stop valve

1 Remove the stop valve cover.

2 Insert a hexagon wrench (liquid side: 4 mm, gas side: 4 mm) into the valve

stem and turn the valve stem:

Counterclockwise to open

Clockwise to close

3 When the stop valve CANNOT be turned any further, stop turning.

4 Install the stop valve cover.

Result: The valve is now open/closed.

To handle the stem cap

▪ The stem cap is sealed where indicated with the arrow. Do NOT damage it.

▪ After handling the stop valve, tighten the stem cap, and check for refrigerant

leaks.

Item Tightening torque (N∙m)

Stem cap, liquid side 21.6~27.4

Stem cap, gas side 21.6~27.4

To handle the service cap

▪ ALWAYS use a charge hose equipped with a valve depressor pin, since the service

port is a Schrader type valve.

▪ After handling the service port, tighten the service port cap, and check for

refrigerant leaks.

Item Tightening torque (N∙m)

Service port cap 10.8~14.7

7.2.7 To connect the refrigerant piping to the outdoor unit

▪ Piping length. Keep field piping as short as possible.

▪ Piping protection. Protect the field piping against physical damage.

7 | Piping installation

Installer reference guide

RXF20~42E5V1B+ARXF20~42E5V1B

R32 split series

4P519439-21V – 2022.10

1 Connect the liquid refrigerant connection from the indoor unit to the liquid

stop valve of the outdoor unit.

c b

a Liquid stop valve

b Gas stop valve

c Service port

2 Connect the gas refrigerant connection from the indoor unit to the gas stop

valve of the outdoor unit.

NOTICE

It is recommended that the refrigerant piping between indoor and outdoor unit is

installed in a ducting or the refrigerant piping is wrapped with finishing tape.

7.3 Checking the refrigerant piping

7.3.1 About checking the refrigerant piping

The outdoor unit's internal refrigerant piping has been factory tested for leaks. You

only have to check the outdoor unit's external refrigerant piping.

Before checking the refrigerant piping

Make sure the refrigerant piping is connected between the outdoor unit and the

indoor unit.

Typical workflow

Checking the refrigerant piping typically consists of the following stages:

1 Checking for leaks in the refrigerant piping.

2 Performing vacuum drying to remove all moisture, air or nitrogen from the

refrigerant piping.

If there is a possibility of moisture being present in the refrigerant piping (for

example, water may have entered the piping), first carry out the vacuum drying

procedure below until all moisture has been removed.

7.3.2 Precautions when checking the refrigerant piping

INFORMATION

Also read the precautions and requirements in the following chapters:

▪ General safety precautions

▪ Preparation

NOTICE

Use a 2-stage vacuum pump with a non-return valve that can evacuate to a gauge

pressure of −⁠100.7kPa (−⁠1.007bar)(5Torr absolute). Make sure the pump oil does

not flow oppositely into the system while the pump is not working.

7 | Piping installation

Installer reference guide

RXF20~42E5V1B+ARXF20~42E5V1B

R32 split series

4P519439-21V – 2022.10

NOTICE

Use this vacuum pump for R32 exclusively. Using the same pump for other

refrigerants may damage the pump and the unit.

NOTICE

▪ Connect the vacuum pump to the service port of the gas stop valve.

▪ Make sure that the gas stop valve and liquid stop valve are firmly closed before

performing the leak test or vacuum drying.

7.3.3 To check for leaks

NOTICE

Do NOT exceed the unit's maximum working pressure (see "PS High" on the unit

name plate).

NOTICE

ALWAYS use a recommended bubble test solution from your wholesaler.

NEVER use soap water:

▪ Soap water may cause cracking of components, such as flare nuts or stop valve

caps.

▪ Soap water may contain salt, which absorbs moisture that will freeze when the

piping gets cold.

▪ Soap water contains ammonia which may lead to corrosion of flared joints

(between the brass flare nut and the copper flare).

1 Charge the system with nitrogen gas up to a gauge pressure of at least

200kPa (2bar). It is recommended to pressurize to 3000kPa (30bar) in order

to detect small leaks.

2 Check for leaks by applying the bubble test solution to all connections.

3 Discharge all nitrogen gas.

7.3.4 To perform vacuum drying

Connect the vacuum pump and manifold as follows:

a Low pressure gauge

b Gauge manifold

c High pressure gauge

d Low-pressure valve (Lo)

e High-pressure valve (Hi)

7 | Piping installation

Installer reference guide

RXF20~42E5V1B+ARXF20~42E5V1B

R32 split series

4P519439-21V – 2022.10

f Charging hoses

g Vacuum pump

h Valve caps

i Service port

j Gas stop valve

k Liquid stop valve

1 Vacuum the system until the pressure on the manifold indicates −0.1 MPa

(−1bar).

2 Leave as is for 4-5minutes and check the pressure:

If the pressure… Then…

Does not change There is no moisture in the system.

This procedure is finished.

Increases There is moisture in the system. Go

to the next step.

3 Vacuum the system for at least 2hours to a manifold pressure of −0.1MPa

(−1bar).

4 After turning the pump OFF, check the pressure for at least 1hour.

5 If you do NOT reach the target vacuum or CANNOT maintain the vacuum for

1hour, do the following:

▪ Check for leaks again.

▪ Perform vacuum drying again.

NOTICE

Make sure to open the stop valves after installing the refrigerant piping and

performing vacuum drying. Running the system with the stop valves closed may

break the compressor.

INFORMATION

After opening the stop valve, it is possible that the pressure in the refrigerant piping

does NOT increase. This might be caused by e.g. the closed state of the expansion

valve in the outdoor unit circuit, but does NOT present any problem for correct

operation of the unit.

7.4 Charging refrigerant

7.4.1 About charging refrigerant

The outdoor unit is factory charged with refrigerant, but in some cases the

following might be necessary:

What When

Charging additional refrigerant When the total liquid piping length is

more than specified (see later).

Completely recharging refrigerant Example:

▪ When relocating the system.

▪ After a leak.

Charging additional refrigerant

Before charging additional refrigerant, make sure the outdoor unit's external

refrigerant piping is checked (leak test, vacuum drying).

7 | Piping installation

Installer reference guide

RXF20~42E5V1B+ARXF20~42E5V1B

R32 split series

4P519439-21V – 2022.10

INFORMATION

Depending on the units and/or the installation conditions, it might be necessary to

connect electrical wiring before you can charge refrigerant.

Typical workflow – Charging additional refrigerant typically consists of the following

stages:

1 Determining if and how much you have to charge additionally.

2 If necessary, charging additional refrigerant.

3 Filling in the fluorinated greenhouse gases label, and fixing it to the inside of

the outdoor unit.

Completely recharging refrigerant

Before completely recharging refrigerant, make sure the following is done:

1 All refrigerant is recovered from the system.

2 The outdoor unit's external refrigerant piping is checked (leak test, vacuum

drying).

3 Vacuum drying on the outdoor unit's internal refrigerant piping is performed.

NOTICE

Before completely recharging, perform vacuum drying on the outdoor unit's internal

refrigerant piping as well.

Typical workflow – Completely recharging refrigerant typically consists of the

following stages:

1 Determining how much refrigerant to charge.

2 Charging refrigerant.

3 Filling in the fluorinated greenhouse gases label, and fixing it to the inside of

the outdoor unit.

7.4.2 About the refrigerant

This product contains fluorinated greenhouse gases. Do NOT vent gases into the

atmosphere.

Refrigerant type: R32

Global warming potential (GWP) value: 675

Periodical inspections for refrigerant leaks may be required depending on the

applicable legislation. Contact your installer for more information.

WARNING: MILDLY FLAMMABLE MATERIAL

The refrigerant inside this unit is mildly flammable.

7 | Piping installation

Installer reference guide

RXF20~42E5V1B+ARXF20~42E5V1B

R32 split series

4P519439-21V – 2022.10

WARNING

▪ The refrigerant inside the unit is mildly flammable, but normally does NOT leak. If

the refrigerant leaks in the room and comes in contact with fire from a burner, a

heater, or a cooker, this may result in fire, or the formation of a harmful gas.

▪ Turn OFF any combustible heating devices, ventilate the room, and contact the

dealer where you purchased the unit.

▪ Do NOT use the unit until a service person confirms that the part from which the

refrigerant leaked has been repaired.

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 pierce or burn refrigerant cycle parts.

▪ Do NOT use cleaning materials or means to accelerate the defrosting process

other than those recommended by the manufacturer.

▪ Be aware that the refrigerant inside the system is odourless.

NOTICE

Applicable legislation on fluorinated greenhouse gases requires that the refrigerant

charge of the unit is indicated both in weight and CO

equivalent.

Formula to calculate the quantity in CO

equivalent tonnes: GWP value of the

refrigerant × total refrigerant charge [in kg]/1000

Contact your installer for more information.

7.4.3 To determine the additional refrigerant amount

If the total liquid piping

length is…

Then…

≤10m Do NOT add additional refrigerant.

>10m R=(total length (m) of liquid piping⁠–⁠10m)×0.020

R=Additional charge (kg) (rounded in units of

0.01kg)

INFORMATION

Piping length is the one-way length of liquid piping.

7.4.4 To determine the complete recharge amount

INFORMATION

If a complete recharge is necessary, the total refrigerant charge is: the factory

refrigerant charge (see unit name plate) + the determined additional amount.

7 | Piping installation

Installer reference guide

RXF20~42E5V1B+ARXF20~42E5V1B

R32 split series

4P519439-21V – 2022.10

7.4.5 To charge additional refrigerant

WARNING

▪ Only use R32 as refrigerant. Other substances may cause explosions and

accidents.

▪ R32 contains fluorinated greenhouse gases. Its global warming potential (GWP)

value is 675. Do NOT vent these gases into the atmosphere.

▪ When charging refrigerant, ALWAYS use protective gloves and safety glasses.

NOTICE

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

refrigerant.

Prerequisite: Before charging refrigerant, make sure the refrigerant piping is

connected and checked (leak test and vacuum drying).

1 Connect the refrigerant cylinder to the service port.

2 Charge the additional refrigerant amount.

3 Open the gas stop valve.

If pump down is needed in case of dismantling or relocating the system, see

"14.2To pump down"[459] for more details.

7.4.6 To fix the fluorinated greenhouse gases label

1 Fill in the label as follows:

Contains fluorinated greenhouse gases

tCO

GWP × kg

1000

GWP: XXX

RXXX

a If a multilingual fluorinated greenhouse gases label is delivered with the unit (see

accessories), peel off the applicable language and stick it on top of a.

b Factory refrigerant charge: see unit name plate

c Additional refrigerant amount charged

d Total refrigerant charge

e Quantity of fluorinated greenhouse gases of the total refrigerant charge

expressed as tonnes CO

equivalent.

f GWP = Global Warming Potential

NOTICE

Applicable legislation on fluorinated greenhouse gases requires that the refrigerant

charge of the unit is indicated both in weight and CO

equivalent.

Formula to calculate the quantity in CO

equivalent tonnes: GWP value of the

refrigerant × total refrigerant charge [in kg] / 1000

Use the GWP value mentioned on the refrigerant charge label.

2 Fix the label on the inside of the outdoor unit near the gas and liquid stop

valves.

8 | Electrical installation

Installer reference guide

RXF20~42E5V1B+ARXF20~42E5V1B

R32 split series

4P519439-21V – 2022.10

8 Electrical installation

In this chapter

8.1 Preparing electrical wiring...................................................................................................................................................... 45

8.1.1 About preparing electrical wiring .......................................................................................................................... 45

8.2 Connecting the electrical wiring............................................................................................................................................. 46

8.2.1 About connecting the electrical wiring.................................................................................................................. 46

8.2.2 Precautions when connecting the electrical wiring .............................................................................................. 46

8.2.3 Guidelines when connecting the electrical wiring ................................................................................................ 47

8.2.4 Specifications of standard wiring components ..................................................................................................... 48

8.2.5 To connect the electrical wiring to the outdoor unit ............................................................................................ 48

8.1 Preparing electrical wiring

8.1.1 About preparing electrical wiring

INFORMATION

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

precautions"[46].

INFORMATION

Also read "8.2.4Specifications of standard wiring components"[448].

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, 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

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

with the applicable national wiring regulation.

▪ Make electrical connections to the fixed wiring.

▪ All components procured on-site and all electrical construction MUST comply

with the applicable legislation.

WARNING

ALWAYS use multicore cable for power supply cables.

8 | Electrical installation

Installer reference guide

RXF20~42E5V1B+ARXF20~42E5V1B

R32 split series

4P519439-21V – 2022.10

8.2 Connecting the electrical wiring

8.2.1 About connecting the electrical wiring

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.

8.2.2 Precautions when connecting the electrical wiring

DANGER: RISK OF ELECTROCUTION

WARNING

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

with the applicable national wiring regulation.

▪ Make electrical connections to the fixed wiring.

▪ All components procured on-site and all electrical construction MUST comply

with the applicable legislation.

WARNING

ALWAYS use multicore cable for power supply cables.

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.

8 | Electrical installation

Installer reference guide

RXF20~42E5V1B+ARXF20~42E5V1B

R32 split series

4P519439-21V – 2022.10

INFORMATION

Also read the precautions and requirements in the following chapters:

▪ General safety precautions

▪ Preparation

8.2.3 Guidelines when connecting the electrical wiring

Keep the following in mind:

NOTICE

We recommend using solid (single-core) wires. If stranded wires are used, twist the

conductor to consolidate the end or twist the conductor to consolidate the end in

combination with the usage of a round crimp-style terminal on the end of the

conductor.

To prepare stranded conductor wire for installation

Method 1: Twisting conductor

1 Strip insulation (20 mm) from the wires.

2 Twist the end of the conductor to create a "solid-like" connection.

Method 2: Using round crimp-style terminal

1 Strip insulation from wires and twist the end of each wire.

2 Install a round crimp-style terminal on the end of the wire. Place the round

crimp-style terminal on the wire up to the covered part and fasten the

terminal with the appropriate tool.

Use the following methods for installing wires:

Wire type Installation method

Single-core wire

Stranded conductor wire

twisted to "solid-like"

connection

c b

AA´

A´

a Curled wire (single-core or twisted stranded

conductor wire)

b Screw

c Flat washer

8 | Electrical installation

Installer reference guide

RXF20~42E5V1B+ARXF20~42E5V1B

R32 split series

4P519439-21V – 2022.10

Wire type Installation method

Stranded conductor wire

with round crimp-style

terminal

c b ba c

a Terminal

b Screw

c Flat washer

Allowed

NOT allowed

Tightening torques

Item Tightening torque (N•m)

M4 (X1M) 1.2~1.5

M4 (earth)

▪ The earth wire between the wire retainer and the terminal must be longer than

the other wires.

1-3

8.2.4 Specifications of standard wiring components

Component

Power supply cable Voltage 220~240V

Phase 1~

Frequency 50Hz

Wire sizes MUST comply with applicable

legislation

Interconnection cable (indoor↔outdoor) 4-core cable ≥1.5 mm² and

applicable for 220~240 V

Recommended field fuse 16A

Earth leakage circuit breaker MUST comply with applicable

legislation

8.2.5 To connect the electrical wiring to the outdoor unit

1 Remove the service cover. See "6.2.2To open the outdoor unit"[429].

2 Strip insulation (20mm) from the wires.

a b

a Strip wire end to this point

b An excessive strip length may cause electrical shock or leakage

3 Open the wire clamp.

8 | Electrical installation

Installer reference guide

RXF20~42E5V1B+ARXF20~42E5V1B

R32 split series

4P519439-21V – 2022.10

4 Connect the interconnection cable and power supply as follows:

50 Hz

220-240 V

a b

c d e

a Interconnection cable

b Power supply cable

c Circuit breaker

d Residual current device

e Power supply

f Earth

3×

5 Tighten the terminal screws securely. We recommend using a Phillips

screwdriver.

9 | Finishing the outdoor unit installation

Installer reference guide

RXF20~42E5V1B+ARXF20~42E5V1B

R32 split series

4P519439-21V – 2022.10

9 Finishing the outdoor unit installation

9.1 To finish the outdoor unit installation

NOTICE

It is recommended that the refrigerant piping between indoor and outdoor unit is

installed in a ducting or the refrigerant piping is wrapped with finishing tape.

1 Insulate and fix the refrigerant piping and cables as follows:

a Gas pipe

b Gas pipe insulation

c Interconnection cable

d Field wiring (if applicable)

e Liquid pipe

f Liquid pipe insulation

g Finishing tape

2 Install the service cover.

9.2 To close the outdoor unit

NOTICE

When closing the outdoor unit cover, make sure that the tightening torque does NOT

exceed 1.3N•m.

1×

10 | Commissioning

Installer reference guide

RXF20~42E5V1B+ARXF20~42E5V1B

R32 split series

4P519439-21V – 2022.10

10 Commissioning

10.1 Overview: Commissioning

This chapter describes what you have to do and know to commission the system

after it is installed.

Typical workflow

Commissioning typically consists of the following stages:

1 Checking the "Checklist before commissioning".

2 Performing a test run for the system.

10.2 Precautions when commissioning

DANGER: RISK OF ELECTROCUTION

DANGER: RISK OF BURNING/SCALDING

CAUTION

Do NOT perform the test operation while working on the indoor units.

When performing the test operation, NOT ONLY the outdoor unit, but the connected

indoor unit will operate as well. Working on an indoor unit while performing a test

operation is dangerous.

CAUTION

Do NOT insert fingers, rods or other objects into the air inlet or outlet. Do NOT

remove the fan guard. When the fan is rotating at high speed, it will cause injury.

NOTICE

Turn ON the power 6 hours before operation in order to have power running to the

crankcase heater and to protect the compressor.

During test operation, the outdoor unit and the indoor units will start up. Make

sure that the preparations of all indoor units are finished (field piping, electrical

wiring, air purge, ...). See installation manual of the indoor units for details.

10.3 Checklist before commissioning

1 After the installation of the unit, check the items listed below.

2 Close the unit.

3 Power up the unit.

The indoor unit is properly mounted.

10 | Commissioning

Installer reference guide

RXF20~42E5V1B+ARXF20~42E5V1B

R32 split series

4P519439-21V – 2022.10

The outdoor unit is properly mounted.

The system is properly earthed and the earth terminals are tightened.

The power supply voltage matches the voltage on the identification label of the unit.

There are NO loose connections or damaged electrical components in the switchbox.

There are NO damaged components or squeezed pipes on the inside of the indoor and

outdoor units.

There are NO refrigerant leaks.

The refrigerant pipes (gas and liquid) are thermally insulated.

The correct pipe size is installed and the pipes are properly insulated.

The stop valves (gas and liquid) on the outdoor unit are fully open.

The following field wiring has been carried out according to this document and the

applicable legislation between the outdoor unit and the indoor unit.

Drainage

Make sure drainage flows smoothly.

Possible consequence: Condensate water might drip.

The indoor unit receives the signals of the user interface.

The specified wires are used for the interconnection cable.

The fuses, circuit breakers, or locally installed protection devices are installed according to

this document, and have NOT been bypassed.

10.4 Checklist during commissioning

To perform an air purge.

To perform a test run.

10.5 To perform a test run

Prerequisite: Power supply MUST be in the specified range.

Prerequisite: Test run may be performed in cooling or heating mode.

Prerequisite: Test run should be performed in accordance with the operation

manual of the indoor unit to make sure that all functions and parts are working

properly.

1 In cooling mode, select the lowest programmable temperature. In heating

mode, select the highest programmable temperature. Test run can be

disabled if necessary.

2 When the test run is finished, set the temperature to a normal level. In cooling

mode: 26~28°C, in heating mode: 20~24°C.

3 The system stops operating 3minutes after the unit is turned OFF.

10 | Commissioning

Installer reference guide

RXF20~42E5V1B+ARXF20~42E5V1B

R32 split series

4P519439-21V – 2022.10

INFORMATION

▪ Even if the unit is turned OFF, it consumes electricity.

▪ When the power turns back on after a power break, the previously selected

mode will be resumed.

10.6 Starting up the outdoor unit

See the indoor unit installation manual for configuration and commissioning of the

system.

11 | Hand-over to the user

Installer reference guide

RXF20~42E5V1B+ARXF20~42E5V1B

R32 split series

4P519439-21V – 2022.10

11 Hand-over to the user

Once the test run is finished and the unit operates properly, make sure the

following is clear for the user:

▪ Make sure that the user has the printed documentation and ask him/her to keep

it for future reference. Inform the user that he can find the complete

documentation at the URL mentioned earlier in this manual.

▪ Explain the user how to properly operate the system and what to do in case of

problems.

▪ Show the user what to do for the maintenance of the unit.

▪ Explain the user about energy saving tips as described in the operation manual.

13 | Troubleshooting

Installer reference guide

RXF20~42E5V1B+ARXF20~42E5V1B

R32 split series

4P519439-21V – 2022.10

13 Troubleshooting

13.1 Overview: Troubleshooting

This chapter describes what you have to do in case of problems.

It contains information about solving problems based on symptoms.

Before troubleshooting

Carry out a thorough visual inspection of the unit and look for obvious defects such

as loose connections or defective wiring.

13.2 Precautions when troubleshooting

DANGER: RISK OF ELECTROCUTION

DANGER: RISK OF BURNING/SCALDING

WARNING

▪ When carrying out an inspection on the switch box of the unit, ALWAYS make

sure that the unit is disconnected from the mains. Turn off the respective circuit

breaker.

▪ When a safety device was activated, stop the unit and find out why the safety

device was activated before resetting it. NEVER shunt safety devices or change

their values to a value other than the factory default setting. If you are unable to

find the cause of the problem, call your dealer.

WARNING

Prevent hazards due to inadvertent resetting of the thermal cut-out: power to this

appliance MUST NOT be supplied through an external switching device, such as a

timer, or connected to a circuit that is regularly turned ON and OFF by the utility.

13.3 Solving problems based on symptoms

13.3.1 Symptom: Indoor units fall, vibrate or make noise

Possible causes Corrective action

The indoor units are NOT installed

securely.

Install the indoor units securely.

13 | Troubleshooting

Installer reference guide

RXF20~42E5V1B+ARXF20~42E5V1B

R32 split series

4P519439-21V – 2022.10

13.3.2 Symptom: The unit is NOT heating or cooling as expected

Possible causes Corrective action

Wrong connection of the electrical

wires

Connect the electrical wires correctly.

Gas leakage Check for gas leakage.

13.3.3 Symptom: Water leakage

Possible causes Corrective action

Incomplete thermal insulation (gas and

liquid piping, indoor portions of the

drain hose extension).

Make sure the thermal insulation of the

piping and the drain hose is complete.

Improperly connected drainage. Secure the drainage.

13.3.4 Symptom: Electrical leakage

Possible causes Corrective action

The unit is NOT earthed correctly. Check and correct the connection of the

earth wiring.

13.3.5 Symptom: Unit does NOT function or burn damage

Possible causes Corrective action

The wiring was NOT performed in

accordance with the specifications.

Correct the wiring.

14 | Disposal

Installer reference guide

RXF20~42E5V1B+ARXF20~42E5V1B

R32 split series

4P519439-21V – 2022.10

14 Disposal

NOTICE

Do NOT try to dismantle the system yourself: dismantling of the system, treatment of

the refrigerant, oil and other parts MUST comply with applicable legislation. Units

MUST be treated at a specialised treatment facility for reuse, recycling and recovery.

▪ Units are marked with the following symbol:

This means that electrical and electronic products may NOT be mixed with

unsorted household waste. Do NOT try to dismantle the system yourself:

dismantling the system, treatment of the refrigerant, of oil and of other parts

MUST be done by an authorised installer and MUST comply with applicable

legislation.

Units MUST be treated at a specialised treatment facility for reuse, recycling and

recovery. By ensuring this product is disposed of correctly, you will help to

prevent potential negative consequences for the environment and human

health. For more information, contact your installer or local authority.

14.1 Overview: Disposal

Typical workflow

Disposing of the system typically consists of the following stages:

1 Pumping down the system.

2 Bringing the system to a specialized treatment facility.

INFORMATION

For more details, see the service manual.

14.2 To pump down

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: Self-

combustion 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.

14 | Disposal

Installer reference guide

RXF20~42E5V1B+ARXF20~42E5V1B

R32 split series

4P519439-21V – 2022.10

NOTICE

During pump down operation, stop the compressor before removing the refrigerant

piping. If the compressor is still running and the stop valve is open during pump

down, air will be sucked into the system. Compressor breakdown or damage to the

system can result due to abnormal pressure in the refrigerant cycle.

Pump down operation will extract all refrigerant from the system into the outdoor

unit.

1 Remove the valve cap from the liquid stop valve and the gas stop valve.

2 Carry out forced cooling. See "14.3To start and stop forced cooling"[460].

3 After 5 to 10minutes (after only 1 or 2minutes in case of very low ambient

temperatures (<−10°C)), close the liquid stop valve with a hexagonal wrench.

4 Check on the manifold if the vacuum is reached.

5 After 2-3minutes, close the gas stop valve and stop forced cooling.

a Gas stop valve

b Closing direction

c Hexagonal wrench

d Valve cap

e Liquid stop valve

14.3 To start and stop forced cooling

There are 2methods to perform forced cooling.

▪ Method 1. Using the indoor unit ON/OFF switch (if present on the indoor unit).

▪ Method 2. Using the indoor unit user interface.

14.3.1 To start and stop forced cooling using the indoor unit ON/OFF switch

1 Press the ON/OFF switch for at least 5seconds.

Result: Operation will start.

INFORMATION

Forced cooling stops automatically after 15minutes.

2 To stop operation sooner, press the ON/OFF switch.

14.3.2 To start and stop forced cooling using the indoor unit user interface

1 Set the operation mode to cooling. Refer to "To perform a test run" in the

installation manual of the indoor unit.

15 | Technical data

Installer reference guide

RXF20~42E5V1B+ARXF20~42E5V1B

R32 split series

4P519439-21V – 2022.10

15.1 Wiring diagram

INDOOR

OUTDOOR

For applied parts and numbering, refer to the wiring diagram on the unit. Part numbering is by Arabic numbers in ascending order for each part

and is represented in the overview below by symbol “*” in the part code.

Unified Wiring Diagram Legend

: CIRCUIT BREAKER

: CONNECTION

: CONNECTOR

: EARTH

: FIELD WIRING

: FUSE

: INDOOR UNIT

: OUTDOOR UNIT

: PROTECTIVE EARTH

: PROTECTIVE EARTH (SCREW)

: RECTIFIER

: RELAY CONNECTOR

: SHORT-CIRCUIT CONNECTOR

: TERMINAL

: TERMINAL STRIP

: WIRE CLAMP

WHT : WHITE

YLW : YELLOW

PNK : PINK

PRP, PPL : PURPLE

RED : RED

GRN : GREEN

GRY : GREY

ORG : ORANGE

BLK : BLACK

BLU : BLUE

BRN : BROWN

A*P : PRINTED CIRCUIT BOARD

BS* : PUSHBUTTON ON/OFF, OPERATION SWITCH

BZ, H*O : BUZZER

C* : CAPACITOR

AC*, CN*, E*, HA*, HE*, HL*, HN*, : CONNECTION, CONNECTOR

HR*, MR*_A, MR*_B, S*, U, V,

W, X*A, K*R_*

D*, V*D : DIODE

DB* : DIODE BRIDGE

DS* : DIP SWITCH

E*H : HEATER

F*U, FU*

(FOR CHARACTERISTICS,

: FUSE

REFER TO PCB INSIDE YOUR UNIT)

FG* : CONNECTOR (FRAME GROUND)

H* : HARNESS

H*P, LED*, V*L : PILOT LAMP, LIGHT EMITTING DIODE

HAP : LIGHT EMITTING DIODE (SERVICE MONITOR GREEN)

HIGH VOLTAGE : HIGH VOLTAGE

IES : INTELLIGENT EYE SENSOR

IPM* : INTELLIGENT POWER MODULE

K*R, KCR, KFR, KHuR, K*M : MAGNETIC RELAY

L : LIVE

L* : COIL

L*R : REACTOR

M* : STEPPER MOTOR

M*C : COMPRESSOR MOTOR

M*F : FAN MOTOR

M*P : DRAIN PUMP MOTOR

M*S : SWING MOTOR

MR*, MRCW*, MRM*, MRN* : MAGNETIC RELAY

N : NEUTRAL

n=*, N=* : NUMBER OF PASSES THROUGH FERRITE CORE

PAM : PULSE-AMPLITUDE MODULATION

PCB* : PRINTED CIRCUIT BOARD

PM* : POWER MODULE

PS : SWITCHING POWER SUPPLY

PTC* : THERMISTOR PTC

Q* : INSULATED GATE BIPOLAR TRANSISTOR

(IGBT)

Q*DI : EARTH LEAK CIRCUIT BREAKER

Q*L : OVERLOAD PROTECTOR

Q*M : THERMO SWITCH

R* : RESISTOR

R*T : THERMISTOR

RC : RECEIVER

S*C : LIMIT SWITCH

S*L : FLOAT SWITCH

S*NPH : PRESSURE SENSOR (HIGH)

S*NPL : PRESSURE SENSOR (LOW)

S*PH, HPS* : PRESSURE SWITCH (HIGH)

S*PL : PRESSURE SWITCH (LOW)

S*T : THERMOSTAT

S*RH : HUMIDITY SENSOR

S*W, SW* : OPERATION SWITCH

SA*, F1S : SURGE ARRESTOR

SR*, WLU : SIGNAL RECEIVER

SS* : SELECTOR SWITCH

SHEET METAL : TERMINAL STRIP FIXED PLATE

T*R : TRANSFORMER

TC, TRC : TRANSMITTER

V*, R*V : VARISTOR

V*R : DIODE BRIDGE

WRC : WIRELESS REMOTE CONTROLLER

X* : TERMINAL

X*M : TERMINAL STRIP (BLOCK)

Y*E : ELECTRONIC EXPANSION VALVE COIL

Y*R, Y*S : REVERSING SOLENOID VALVE COIL

Z*C : FERRITE CORE

ZF, Z*F : NOISE FILTER

DAIKIN ISITMA VE SOĞUTMA SİSTEMLERİ SAN.TİC. A.Ş.

İSTANBUL / TÜRKİYE

Tel: 0216 453 27 00

Faks: 0216 671 06 00

Çağrı Merkezi: 444 999 0

Web: www.daikin.com.tr

Gülsuyu Mahallesi, Fevzi Çakmak Caddesi, Burçak Sokak, No:20, 34848 Maltepe

4P519439-21V 2022.10

Verantwortung für Energie und Umwelt

Produkspesifikasjoner

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Modell:	RXF25E5V1B

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