Daikin RXTM30N2V1B, RXTM40N2V1B, RXTP25N2V1B9, RXTP35N2V1B9, RXTP25N2V1B8 Installer reference guide

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Installer reference guide

R32 split series

RXTM30N2V1B RXTM40N2V1B

RXTP25N2V1B9 RXTP35N2V1B9 RXTP25N2V1B8 RXTP35N2V1B8

ARXTP25N2V1B ARXTP35N2V1B

RXTA30N2V1B

Table of contents

1 About the documentation 4

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

2 General safety precautions 5

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

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

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

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

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

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

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

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

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

3 Specific installer safety instructions 16

4 About the box 22

4.1 Overview: About the box ................................................................................................................................................ 22

4.2 Outdoor unit ................................................................................................................................................................... 22

4.2.1 To unpack the outdoor unit ........................................................................................................................... 22

4.2.2 To remove the accessories from the outdoor unit........................................................................................ 23

5 About the unit 24

5.1 Overview: About the unit ............................................................................................................................................... 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 unit ............................................................................................................................................................. 29

6.2.1 About opening the unit .................................................................................................................................. 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 ............................................................................................................................. 31

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 insulation .......................................................................................................................... 33

7.1.3 Refrigerant piping length and height difference ........................................................................................... 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 .................................................................................... 35

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 ...................................................................................................................................... 37

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

7.2.7 To connect the refrigerant piping to the outdoor unit ................................................................................. 39

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........................................................................................ 40

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

7.3.4 To perform vacuum drying............................................................................................................................. 41

Installer reference guide

8 Charging refrigerant 43

8.1 About charging refrigerant ............................................................................................................................................. 43

8.2 About the refrigerant...................................................................................................................................................... 44

8.3 Precautions when charging refrigerant.......................................................................................................................... 45

8.4 To determine the additional refrigerant amount .......................................................................................................... 45

8.5 To determine the complete recharge amount .............................................................................................................. 45

RXTM30+40N2V1B + RXTP25+35N2V1B9 + RXTP25+35N2V1B8 +

ARXTP25+35N2V1B + RXTA30N2V1B

R32 split series

4P518023-7H – 2020.08

Table of contents

8.6 To charge additional refrigerant..................................................................................................................................... 45

8.7 To fix the fluorinated greenhouse gases label ............................................................................................................... 46

9 Electrical installation 47

9.1 About connecting the electrical wiring .......................................................................................................................... 47

9.1.1 Precautions when connecting the electrical wiring....................................................................................... 47

9.1.2 Guidelines when connecting the electrical wiring......................................................................................... 49

9.1.3 Specifications of standard wiring components.............................................................................................. 50

9.2 To connect the electrical wiring to the outdoor unit..................................................................................................... 50

10 Finishing the outdoor unit installation 52

10.1 To finish the outdoor unit installation............................................................................................................................ 52

10.2 To close the outdoor unit ............................................................................................................................................... 52

11 Configuration 53

11.1 Facility setting ................................................................................................................................................................. 53

11.1.1 To set the facility mode.................................................................................................................................. 53

12 Commissioning 54

12.1 Overview: Commissioning .............................................................................................................................................. 54

12.2 Precautions when commissioning .................................................................................................................................. 54

12.3 Checklist before commissioning ..................................................................................................................................... 54

12.4 Checklist during commissioning ..................................................................................................................................... 55

12.5 To perform a test run...................................................................................................................................................... 55

12.6 Starting up the outdoor unit........................................................................................................................................... 56

13 Hand-over to the user 57

14 Maintenance and service 58

14.1 Overview: Maintenance and service .............................................................................................................................. 58

14.2 Maintenance safety precautions .................................................................................................................................... 58

14.3 Checklist for yearly maintenance of the outdoor unit ................................................................................................... 58

14.4 About the compressor .................................................................................................................................................... 59

15 Troubleshooting 60

15.1 Overview: Troubleshooting ............................................................................................................................................ 60

15.2 Precautions when troubleshooting ................................................................................................................................ 60

15.3 Solving problems based on symptoms ........................................................................................................................... 60

15.3.1 Symptom: Indoor units fall, vibrate or make noise ....................................................................................... 60

15.3.2 Symptom: The unit is NOT heating or cooling as expected........................................................................... 61

15.3.3 Symptom: Water leakage............................................................................................................................... 61

15.3.4 Symptom: Electrical leakage .......................................................................................................................... 61

15.3.5 Symptom: Unit does NOT function or burn damage..................................................................................... 61

15.4 Fault diagnosis using LED on outdoor unit PCB.............................................................................................................. 61

16 Disposal 62

16.1 Overview: Disposal.......................................................................................................................................................... 62

16.2 To pump down ................................................................................................................................................................ 62

16.3 To start and stop forced cooling..................................................................................................................................... 63

16.3.1 To start and stop forced cooling using the indoor unit ON/OFF switch ....................................................... 63

16.3.2 To start and stop forced cooling using the indoor unit user interface ......................................................... 63

17 Technical data 64

17.1 Wiring diagram................................................................................................................................................................ 64

17.1.1 Unified wiring diagram legend....................................................................................................................... 64

17.2 Piping diagram ................................................................................................................................................................ 67

17.2.1 Piping diagram: Outdoor unit......................................................................................................................... 67

18 Glossary 68

RXTM30+40N2V1B + RXTP25+35N2V1B9 + RXTP25+35N2V1B8 + ARXTP25+35N2V1B + RXTA30N2V1B R32 split series 4P518023-7H – 2020.08

Installer reference guide

1 | About the documentation

1 About the documentation

1.1 About this document

Target audience

Authorised installers

INFORMATION

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

WARNING

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

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 http://www.daikineurope.com/support-and-manuals/

product-information/

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

Installer reference guide

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).

RXTM30+40N2V1B + RXTP25+35N2V1B9 + RXTP25+35N2V1B8 +

ARXTP25+35N2V1B + RXTA30N2V1B

R32 split series

4P518023-7H – 2020.08

2 General safety precautions

2.1 About the documentation

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

translations.

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

them carefully.

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

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

2.1.1 Meaning of warnings and symbols

DANGER

Indicates a situation that results in death or serious injury.

2 | General safety precautions

DANGER: RISK OF ELECTROCUTION

Indicates a situation that could result in electrocution.

DANGER: RISK OF BURNING/SCALDING

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

DANGER: RISK OF EXPLOSION

Indicates a situation that could result in explosion.

WARNING

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

WARNING: FLAMMABLE MATERIAL

CAUTION

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

Symbols used on the unit:

RXTM30+40N2V1B + RXTP25+35N2V1B9 + RXTP25+35N2V1B8 + ARXTP25+35N2V1B + RXTA30N2V1B R32 split series 4P518023-7H – 2020.08

NOTICE

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

INFORMATION

Indicates useful tips or additional information.

Installer reference guide

2 | General safety precautions

Symbols used in the documentation:

Symbol Explanation

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

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

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

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

Symbol Explanation

Indicates a figure title or a reference to it.

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

Indicates a table title or a reference to it.

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

2.2 For the installer

2.2.1 General

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

DANGER: RISK OF BURNING/SCALDING

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

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

▪ Do NOT touch any accidental leaking refrigerant.

WARNING

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

WARNING

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

Installer reference guide

CAUTION

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

WARNING

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

RXTM30+40N2V1B + RXTP25+35N2V1B9 + RXTP25+35N2V1B8 +

ARXTP25+35N2V1B + RXTA30N2V1B

R32 split series

4P518023-7H – 2020.08

2 | General safety precautions

WARNING

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

CAUTION

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

CAUTION

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

NOTICE

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

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

2.2.2 Installation site

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

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

▪ Name and address of fire department, police and hospital

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

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

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

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

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

▪ Make sure the unit is level.

Do NOT install the unit in the following places:

▪ In potentially explosive atmospheres.

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

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

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

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

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

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

Instructions for equipment using R32 refrigerant

RXTM30+40N2V1B + RXTP25+35N2V1B9 + RXTP25+35N2V1B8 + ARXTP25+35N2V1B + RXTA30N2V1B R32 split series 4P518023-7H – 2020.08

WARNING: FLAMMABLE MATERIAL

The refrigerant inside this unit is mildly flammable.

Installer reference guide

2 | General safety precautions

WARNING: MILDLY FLAMMABLE MATERIAL

The refrigerant inside this unit is mildly flammable.

WARNING

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

equipment, other than those recommended by the manufacturer.

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

WARNING

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

WARNING

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

WARNING

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

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

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

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

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

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

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

NOTICE

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

refrigeration piping.

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

adverse environmental effects.

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

the likelihood of hydraulic shock damaging the system.

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

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

Installer reference guide

CAUTION

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

RXTM30+40N2V1B + RXTP25+35N2V1B9 + RXTP25+35N2V1B8 +

ARXTP25+35N2V1B + RXTA30N2V1B

R32 split series

4P518023-7H – 2020.08

NOTICE

Contains fluorinated greenhouse gases

tCO2eq

1000

GWP × kg

GWP: xxx

R32

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

for maintenance purposes.

Installation space requirements

WARNING

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

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

refrigerant leakage sensor, consult the installation manual

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

room)

▪ Pipework in unventilated spaces

NOTICE

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

2 | General safety precautions

To determine the minimum floor area

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

charge + additional refrigerant amount charged).

2 Determine which graph or table to use.

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

standing?

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

spaces, this depends on the installation height:

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

<1.8m Floor-standing units

1.8≤x<2.2m Wall-mounted units

≥2.2m Ceiling-mounted units

RXTM30+40N2V1B + RXTP25+35N2V1B9 + RXTP25+35N2V1B8 + ARXTP25+35N2V1B + RXTA30N2V1B R32 split series 4P518023-7H – 2020.08

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

Installer reference guide

2 | General safety precautions

100

110

120

130

140

150

160

170

180

190

200

210

220

230

240

250

260

270

280

290

300

310

320

330

340

350

360

370

380

390

400

410

420

430

440

450

460

470

480

490

500

510

520

530

540

550

1.822.2

2.4

2.6

2.833.2

3.4

3.6

3.844.2

4.4

4.6

4.855.2

5.4

5.6

5.866.2

6.4

6.6

6.877.2

7.4

7.6

7.8

1.843 7.956

8.0

min

(m2)

Floor-standing unit

(c)

Wall-mounted unit

(b)

Ceiling-mounted unit

(a)

m (kg)

Ceiling-mounted

unit

(a)

4.6 13.4

4.6 180

4.8 14.6

4.8 196

5.0 15.8

5.0 213

≤1.842 —

5.2 17.1

≤1.842 —

5.2 230

1.843 3.64

5.4 18.5

1.843 28.9

5.4 248

2.0 3.95

5.6 19.9

2.0 34.0

5.6 267

2.2 4.34

5.8 21.3

2.2 41.2

5.8 286

2.4 4.74

6.0 22.8

2.4 49.0

6.0 306

2.6 5.13

6.2 24.3

2.6 57.5

6.2 327

2.8 5.53

6.4 25.9

2.8 66.7

6.4 349

3.0 5.92

6.6 27.6

3.0 76.6

6.6 371

3.2 6.48

6.8 29.3

3.2 87.2

6.8 394

3.4 7.32

7.0 31.0

3.4 98.4

7.0 417

3.6 8.20

7.2 32.8

3.6 110

7.2 441

3.8 9.14

7.4 34.7

3.8 123

7.4 466

4.0 10.1

7.6 36.6

4.0 136

7.6 492

4.2 11.2

7.8 38.5

4.2 150

7.8 518

4.4 12.3

7.956 40.1

4.4 165

7.956 539

m (kg)

min

(m2)

4.6 20.0

4.8 21.8

5.0 23.6

≤1.842 —

5.2 25.6

1.843 4.45

5.4 27.6

2.0 4.83

5.6 29.7

2.2 5.31

5.8 31.8

2.4 5.79

6.0 34.0

2.6 6.39

6.2 36.4

2.8 7.41

6.4 38.7

3.0 8.51

6.6 41.2

3.2 9.68

6.8 43.7

3.4 10.9

7.0 46.3

3.6 12.3

7.2 49.0

3.8 13.7

7.4 51.8

4.0 15.1

7.6 54.6

4.2 16.7

7.8 57.5

4.4 18.3

7.956 59.9

Wall-mounted

unit

(b)

m (kg)

min

(m2)

Floor-standing

unit

(c)

m (kg)

min

(m2)

Installer reference guide

m Total refrigerant charge in the system

Minimum floor area

min

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

RXTM30+40N2V1B + RXTP25+35N2V1B9 + RXTP25+35N2V1B8 +

ARXTP25+35N2V1B + RXTA30N2V1B

R32 split series

4P518023-7H – 2020.08

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

2.2.3 Refrigerant — in case of R410A or R32

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

NOTICE

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

NOTICE

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

WARNING

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

2 | General safety precautions

WARNING

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

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

deficiency.

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

DANGER: RISK OF EXPLOSION

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

is a leak in the refrigerant circuit:

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

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

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

operate.

WARNING

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

RXTM30+40N2V1B + RXTP25+35N2V1B9 + RXTP25+35N2V1B8 + ARXTP25+35N2V1B + RXTA30N2V1B R32 split series 4P518023-7H – 2020.08

NOTICE

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

NOTICE

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

of refrigerant.

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

according to the applicable legislation.

Installer reference guide

2 | General safety precautions

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

refrigerant and necessary amount.

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

lengths some systems require additional charging of refrigerant.

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

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

▪ Charge the liquid refrigerant as follows:

WARNING

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

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

If Then

A siphon tube is present

Charge with the cylinder upright.

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

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

▪ Open refrigerant cylinders slowly.

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

operation.

CAUTION

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

2.2.4 Brine

Installer reference guide

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

WARNING

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

WARNING

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

RXTM30+40N2V1B + RXTP25+35N2V1B9 + RXTP25+35N2V1B8 +

ARXTP25+35N2V1B + RXTA30N2V1B

R32 split series

4P518023-7H – 2020.08

2.2.5 Water

2.2.6 Electrical

2 | General safety precautions

WARNING

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

WARNING

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

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

NOTICE

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

DANGER: RISK OF ELECTROCUTION

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

electrical wiring or touching electrical parts.

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

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

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

WARNING

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

RXTM30+40N2V1B + RXTP25+35N2V1B9 + RXTP25+35N2V1B8 + ARXTP25+35N2V1B + RXTA30N2V1B R32 split series 4P518023-7H – 2020.08

Installer reference guide

2 | General safety precautions

WARNING

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

supplied with the product.

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

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

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

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

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

another appliance.

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

electrical shock or fire.

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

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

CAUTION

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

the current-carrying connections.

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

first, before separating the earth connection.

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

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

NOTICE

Precautions when laying power wiring:

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

in the power wiring may cause abnormal heat).

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

above.

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

prevent outside pressure being exerted on the terminal board.

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

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

▪ Over-tightening the terminal screws may break them.

Installer reference guide

WARNING

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

terminal inside the electrical components box is connected securely.

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

RXTM30+40N2V1B + RXTP25+35N2V1B9 + RXTP25+35N2V1B8 +

ARXTP25+35N2V1B + RXTA30N2V1B

R32 split series

4P518023-7H – 2020.08

2 | General safety precautions

NOTICE

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

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

RXTM30+40N2V1B + RXTP25+35N2V1B9 + RXTP25+35N2V1B8 + ARXTP25+35N2V1B + RXTA30N2V1B R32 split series 4P518023-7H – 2020.08

Installer reference guide

3 | Specific installer safety instructions

3 Specific installer safety instructions

Always observe the following safety instructions and regulations.

WARNING: FLAMMABLE MATERIAL

The refrigerant inside this unit is mildly flammable.

Unit installation (see

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

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).

Opening the unit (see

"6Unit installation"[425]

)

"6.1Preparing the installation site"[425]

"6.2Opening the unit"[429]

)

DANGER: RISK OF ELECTROCUTION

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

DANGER: RISK OF BURNING/SCALDING

DANGER: RISK OF ELECTROCUTION

Connecting the refrigerant piping (see

piping"[4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:

ð 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.

"7.2Connecting the refrigerant

Installer reference guide

RXTM30+40N2V1B + RXTP25+35N2V1B9 + RXTP25+35N2V1B8 +

ARXTP25+35N2V1B + RXTA30N2V1B

R32 split series

4P518023-7H – 2020.08

3 | Specific installer safety instructions

CAUTION

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

refrigeration oil for R32.

▪ Do NOT reuse joints.

CAUTION

▪ Do NOT use mineral oil on flared part. ▪ 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.

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 start the unit if it is vacuumed.

Charging refrigerant (see

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.

"8Charging refrigerant"[443]

)

RXTM30+40N2V1B + RXTP25+35N2V1B9 + RXTP25+35N2V1B8 + ARXTP25+35N2V1B + RXTA30N2V1B R32 split series 4P518023-7H – 2020.08

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.

Installer reference guide

3 | Specific installer safety instructions

CAUTION

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

WARNING

Appliance shall be installed in accordance with national wiring regulations.

WARNING

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

with the applicable legislation.

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

with the applicable legislation.

WARNING

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

down.

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

or telephone earth. Incomplete earthing may cause electrical shock.

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

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

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

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

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

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

"9Electrical installation"[447]

)

Installer reference guide

WARNING

ALWAYS use multicore cable for power supply cables.

WARNING

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

WARNING

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

WARNING

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

RXTM30+40N2V1B + RXTP25+35N2V1B9 + RXTP25+35N2V1B8 +

ARXTP25+35N2V1B + RXTA30N2V1B

R32 split series

4P518023-7H – 2020.08

3 | Specific installer safety instructions

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.

DANGER: RISK OF ELECTROCUTION

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.

Finishing indoor unit installation (see

installation"[452]

)

DANGER: RISK OF ELECTROCUTION

▪ Make sure that the system is earthed properly. ▪ Turn off the power supply before servicing. ▪ Install the switch box cover before turning on the power supply.

Commissioning (see

"12Commissioning"[454]

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.

"10Finishing the outdoor unit

)

Maintenance and service (see

RXTM30+40N2V1B + RXTP25+35N2V1B9 + RXTP25+35N2V1B8 + ARXTP25+35N2V1B + RXTA30N2V1B R32 split series 4P518023-7H – 2020.08

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.

"14Maintenance and service"[458]

)

DANGER: RISK OF ELECTROCUTION

Installer reference guide

3 | Specific installer safety instructions

DANGER: RISK OF BURNING/SCALDING

WARNING

▪ Before carrying out any maintenance or repair activity, ALWAYS switch off the

circuit breaker on the supply panel, remove the fuses or open the protection devices of the unit.

▪ Do NOT touch live parts for 10 minutes after the power supply is turned off

because of high voltage risk.

▪ Please note that some sections of the electric component box are hot. ▪ Make sure you do NOT touch a conductive section. ▪ Do NOT rinse the unit. This may cause electric shocks or fire.

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 goggles 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

DANGER: RISK OF ELECTROCUTION

DANGER: RISK OF BURNING/SCALDING

"15Troubleshooting"[460]

)

Installer reference guide

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.

RXTM30+40N2V1B + RXTP25+35N2V1B9 + RXTP25+35N2V1B8 +

ARXTP25+35N2V1B + RXTA30N2V1B

R32 split series

4P518023-7H – 2020.08

3 | Specific installer safety instructions

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.

RXTM30+40N2V1B + RXTP25+35N2V1B9 + RXTP25+35N2V1B8 + ARXTP25+35N2V1B + RXTA30N2V1B R32 split series 4P518023-7H – 2020.08

Installer reference guide

4 | About the box

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. Any damage MUST be

reported immediately to the claims agent of the carrier.

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

prevent damage during transport.

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

Fragile, handle the unit with care.

Keep the unit upright in order to avoid damage.

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

4.2 Outdoor unit

4.2.1 To unpack the outdoor unit

Installer reference guide

RXTM30+40N2V1B + RXTP25+35N2V1B9 + RXTP25+35N2V1B8 +

ARXTP25+35N2V1B + RXTA30N2V1B

R32 split series

4P518023-7H – 2020.08

4 | About the box

1×1× 1× 1× 1×

b c da e

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.

RXTM30+40N2V1B + RXTP25+35N2V1B9 + RXTP25+35N2V1B8 + ARXTP25+35N2V1B + RXTA30N2V1B R32 split series 4P518023-7H – 2020.08

a General safety precautions b Outdoor unit installation manual c Fluorinated greenhouse gases label d Multilingual fluorinated greenhouse gases label e Energy label (for models RXTM-N2 and ARXTP-N2 is located on the right side of the unit)

Installer reference guide

5 | About the unit

5 About the unit

5.1 Overview: About the unit

WARNING: MILDLY FLAMMABLE MATERIAL

The refrigerant inside this unit is mildly flammable.

WARNING: FLAMMABLE MATERIAL

The refrigerant inside this unit is mildly flammable.

INFORMATION

For the operation limits see the latest technical data of the outdoor unit on the regional Daikin website (publicly accessible).

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

Installer reference guide

RXTM30+40N2V1B + RXTP25+35N2V1B9 + RXTP25+35N2V1B8 +

ARXTP25+35N2V1B + RXTA30N2V1B

R32 split series

4P518023-7H – 2020.08

6 Unit installation

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.

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 unit..................................................................................................................................................................... 29

6.2.1 About opening the unit .......................................................................................................................................... 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 ..................................................................................................................................... 31

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

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

6 | Unit installation

6.1 Preparing the installation site

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

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

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.

▪ 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.

RXTM30+40N2V1B + RXTP25+35N2V1B9 + RXTP25+35N2V1B8 + ARXTP25+35N2V1B + RXTA30N2V1B R32 split series 4P518023-7H – 2020.08

NOTICE

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.

Installer reference guide

6 | Unit installation

>150

>50

>300

(mm)

>100

>50

>150

>50

>100

6.1.1 Installation site requirements of the outdoor unit

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).

INFORMATION

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

▪ Mind the service space requirements when installing the windbreaker.

a Sea wind b Building c Outdoor unit d Windbreaker

The outdoor unit is designed for outdoor installation only, and for ambient temperatures within the following ranges:

Cooling mode Heating mode

–10~46°C DB –25~24°C DB

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

It is recommended to provide at least 150 mm of free space below the unit (300mm for heavy snowfall areas). Additionally, make sure the unit is positioned at least 100mm above the maximum expected level of snow. If necessary, construct a pedestal. See "6.3Mounting the outdoor unit"[429] for more details.

Installer reference guide

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.

RXTM30+40N2V1B + RXTP25+35N2V1B9 + RXTP25+35N2V1B8 +

ARXTP25+35N2V1B + RXTA30N2V1B

R32 split series

4P518023-7H – 2020.08

6.2 Opening the unit

1×

6.2.1 About opening the unit

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

6.2.2 To open the outdoor unit

6 | Unit installation

DANGER: RISK OF ELECTROCUTION

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

DANGER: RISK OF ELECTROCUTION

DANGER: RISK OF BURNING/SCALDING

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

RXTM30+40N2V1B + RXTP25+35N2V1B9 + RXTP25+35N2V1B8 + ARXTP25+35N2V1B + RXTA30N2V1B R32 split series 4P518023-7H – 2020.08

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

Installer reference guide

6 | Unit installation

20 mm

330

524

211

(mm)

211

6.3.2 Precautions when mounting the outdoor unit

6.3.3 To provide the installation structure

INFORMATION

Also read the precautions and requirements in the following chapters:

▪ "2General safety precautions"[45] ▪ "6.1Preparing the installation site"[425]

Check the strength and level of the installation ground so that the unit will not cause any operating vibration or noise.

Use a vibration-proof rubber (field supply) in cases where vibrations may be transmitted to the building.

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).

Installer reference guide

a 100mm above expected level of snow

RXTM30+40N2V1B + RXTP25+35N2V1B9 + RXTP25+35N2V1B8 +

ARXTP25+35N2V1B + RXTA30N2V1B

R32 split series

4P518023-7H – 2020.08

6.3.4 To install the outdoor unit

4× M8/M10

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.

6 | Unit installation

▪ 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.

INFORMATION

For information on the available options, contact your dealer.

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.

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

cables from scratching the paint (field supply).

RXTM30+40N2V1B + RXTP25+35N2V1B9 + RXTP25+35N2V1B8 + ARXTP25+35N2V1B + RXTA30N2V1B R32 split series 4P518023-7H – 2020.08

4 Attach the ends of the cables.

5 Tighten the cables.

Installer reference guide

6 | Unit installation

Installer reference guide

RXTM30+40N2V1B + RXTP25+35N2V1B9 + RXTP25+35N2V1B8 +

ARXTP25+35N2V1B + RXTA30N2V1B

R32 split series

4P518023-7H – 2020.08

7 Piping installation

In this chapter

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

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

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

7.1.3 Refrigerant piping length and height difference ................................................................................................... 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............................................................................................ 35

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 .............................................................................................................................................. 37

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

7.2.7 To connect the refrigerant piping to the outdoor unit ......................................................................................... 39

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 ............................................................................................... 40

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

7.3.4 To perform vacuum drying .................................................................................................................................... 41

7 | Piping installation

7.1 Preparing refrigerant piping

7.1.1 Refrigerant piping requirements

INFORMATION

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

precautions"[45].

▪ 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)

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.

(a)

7.1.2 Refrigerant piping insulation

▪ Use polyethylene foam as insulation material:

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

0.045kcal/mh°C)

- with a heat resistance of at least 120°C

▪ Insulation thickness

RXTM30+40N2V1B + RXTP25+35N2V1B9 + RXTP25+35N2V1B8 + ARXTP25+35N2V1B + RXTA30N2V1B R32 split series 4P518023-7H – 2020.08

Installer reference guide

7 | Piping installation

ØiØ

ØpØ

Pipe outer diameter (Øp) Insulation inner diameter

6.4mm (1/4") 8~10mm ≥10mm

9.5mm (3/8") 12~15mm

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.

7.1.3 Refrigerant piping length and height difference

What? Distance

Maximum allowable pipe length 20m

Minimum allowable pipe length 1.5m

Maximum allowable height difference 15m

Insulation thickness (t)

(Øi)

7.2 Connecting the refrigerant piping

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:

ð 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.

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.

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

Installer reference guide

RXTM30+40N2V1B + RXTP25+35N2V1B9 + RXTP25+35N2V1B8 +

ARXTP25+35N2V1B + RXTA30N2V1B

R32 split series

4P518023-7H – 2020.08

▪ Keeping in mind the guidelines for:

- Pipe bending

- Flaring pipe ends

- Using the stop valves

7.2.2 Precautions when connecting the refrigerant piping

INFORMATION

Also read the precautions and requirements in the following chapters:

▪ "2General safety precautions"[45] ▪ "7.1Preparing refrigerant piping"[433]

DANGER: RISK OF BURNING/SCALDING

CAUTION

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

refrigeration oil for R32.

▪ Do NOT reuse joints.

7 | Piping installation

CAUTION

▪ 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. ▪ 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).

RXTM30+40N2V1B + RXTP25+35N2V1B9 + RXTP25+35N2V1B8 + ARXTP25+35N2V1B + RXTA30N2V1B R32 split series 4P518023-7H – 2020.08

Installer reference guide

7 | Piping installation

0.4~0.8

±2

45°

90°

±2

ØA

7.2.3 Guidelines when connecting the refrigerant piping

Unit Installation period Protection method

Outdoor unit >1month Pinch the pipe

<1month Pinch or tape the pipe

Indoor unit Regardless of the period

INFORMATION

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

WARNING

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

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).

Installer reference guide

RXTM30+40N2V1B + RXTP25+35N2V1B9 + RXTP25+35N2V1B8 +

ARXTP25+35N2V1B + RXTA30N2V1B

R32 split series

4P518023-7H – 2020.08

7.2.5 To flare the pipe end

a b

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.

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

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

7 | Piping installation

CAUTION

cause refrigerant gas leakage.

a Cut exactly at right angles. b Remove burrs.

Flare tool for R32

(clutch type)

A 0~0.5mm 1.0~1.5mm 1.5~2.0mm

5 Check that the flaring is properly made.

a Flare’s inner surface MUST be flawless. b The pipe end MUST be evenly flared in a perfect circle. c Make sure the flare nut is fitted.

7.2.6 Using the stop valve and service port

CAUTION

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

Conventional flare tool

Clutch type

(Ridgid-type)

Wing nut type

(Imperial-type)

RXTM30+40N2V1B + RXTP25+35N2V1B9 + RXTP25+35N2V1B8 + ARXTP25+35N2V1B + RXTA30N2V1B R32 split series 4P518023-7H – 2020.08

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.

Installer reference guide

7 | Piping installation

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.

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.

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:

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

Silicon sealant, make sure there is no gap.

Counterclockwise to open Clockwise to close

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.

Installer reference guide

RXTM30+40N2V1B + RXTP25+35N2V1B9 + RXTP25+35N2V1B8 +

ARXTP25+35N2V1B + RXTA30N2V1B

R32 split series

4P518023-7H – 2020.08

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

leaks.

Item Tightening torque (N∙m)

Stem cap, liquid side 14.2~17.2

Stem cap, gas side 17.1~20.9

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

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

stop valve of the outdoor unit.

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

RXTM30+40N2V1B + RXTP25+35N2V1B9 + RXTP25+35N2V1B8 + ARXTP25+35N2V1B + RXTA30N2V1B R32 split series 4P518023-7H – 2020.08

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.

Installer reference guide

7 | Piping installation

7.3.2 Precautions when checking the refrigerant piping

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.

INFORMATION

Also read the precautions and requirements in the following chapters:

▪ "2General safety precautions"[45] ▪ "7.1Preparing refrigerant piping"[433]

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.

7.3.3 To check for leaks

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.

NOTICE

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

NOTICE

Make sure to use a recommended bubble test solution from your wholesaler. Do not use soap water, which may cause cracking of flare nuts (soap water may contain salt, which absorbs moisture that will freeze when the piping gets cold), and/or lead to corrosion of flared joints (soap water may contain ammonia which causes a corrosive effect between the brass flare nut and the copper flare).

Installer reference guide

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.

RXTM30+40N2V1B + RXTP25+35N2V1B9 + RXTP25+35N2V1B8 +

ARXTP25+35N2V1B + RXTA30N2V1B

R32 split series

4P518023-7H – 2020.08

7.3.4 To perform vacuum drying

ihj

abc

f f

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)

g Vacuum pump h Valve caps

k Liquid stop valve

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

(−1bar).

7 | Piping installation

DANGER: RISK OF EXPLOSION

Do NOT start the unit if it is vacuumed.

f Charging hoses

i Service port j Gas stop valve

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.

RXTM30+40N2V1B + RXTP25+35N2V1B9 + RXTP25+35N2V1B8 + ARXTP25+35N2V1B + RXTA30N2V1B R32 split series 4P518023-7H – 2020.08

Installer reference guide

7 | Piping installation

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.

Installer reference guide

RXTM30+40N2V1B + RXTP25+35N2V1B9 + RXTP25+35N2V1B8 +

ARXTP25+35N2V1B + RXTA30N2V1B

R32 split series

4P518023-7H – 2020.08

8 Charging refrigerant

In this chapter

8.1 About charging refrigerant..................................................................................................................................................... 43

8.2 About the refrigerant ............................................................................................................................................................. 44

8.3 Precautions when charging refrigerant ................................................................................................................................. 45

8.4 To determine the additional refrigerant amount .................................................................................................................. 45

8.5 To determine the complete recharge amount ...................................................................................................................... 45

8.6 To charge additional refrigerant ............................................................................................................................................ 45

8.7 To fix the fluorinated greenhouse gases label....................................................................................................................... 46

8.1 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

8 | Charging refrigerant

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).

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.

RXTM30+40N2V1B + RXTP25+35N2V1B9 + RXTP25+35N2V1B8 + ARXTP25+35N2V1B + RXTA30N2V1B R32 split series 4P518023-7H – 2020.08

NOTICE

Before completely recharging, perform vacuum drying on the outdoor unit's internal refrigerant piping as well.

Installer reference guide

8 | Charging refrigerant

8.2 About the refrigerant

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.

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

Refrigerant type: R32

Global warming potential (GWP) value: 675

WARNING: FLAMMABLE MATERIAL

The refrigerant inside this unit is mildly flammable.

WARNING: MILDLY FLAMMABLE MATERIAL

The refrigerant inside this unit is mildly flammable.

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.

WARNING

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.

Installer reference guide

WARNING

NEVER directly touch any accidental leaking refrigerant. This could result in severe wounds caused by frostbite.

RXTM30+40N2V1B + RXTP25+35N2V1B9 + RXTP25+35N2V1B8 +

ARXTP25+35N2V1B + RXTA30N2V1B

R32 split series

4P518023-7H – 2020.08

8.3 Precautions when charging refrigerant

INFORMATION

Also read the precautions and requirements in the following chapters:

▪ "2General safety precautions"[45] ▪ "7.1Preparing refrigerant piping"[433]

8.4 To determine the additional refrigerant amount

8 | Charging refrigerant

If the total liquid piping

length is…

≤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.

8.5 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.

8.6 To charge additional refrigerant

Then…

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.

RXTM30+40N2V1B + RXTP25+35N2V1B9 + RXTP25+35N2V1B8 + ARXTP25+35N2V1B + RXTA30N2V1B R32 split series 4P518023-7H – 2020.08

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.

CAUTION

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

Installer reference guide

8 | Charging refrigerant

Contains fluorinated greenhouse gases

tCO2eq

GWP × kg

1000

GWP: XXX

RXXX

8.7 To fix the fluorinated greenhouse gases label

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

"16.2To pump down"[462] for more details.

1 Fill in the label as follows:

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 CO2 equivalent.

Formula to calculate the quantity in CO2 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.

Installer reference guide

RXTM30+40N2V1B + RXTP25+35N2V1B9 + RXTP25+35N2V1B8 +

ARXTP25+35N2V1B + RXTA30N2V1B

R32 split series

4P518023-7H – 2020.08

9 Electrical installation

In this chapter

9.1 About connecting the electrical wiring .................................................................................................................................. 47

9.1.1 Precautions when connecting the electrical wiring .............................................................................................. 47

9.1.2 Guidelines when connecting the electrical wiring ................................................................................................ 49

9.1.3 Specifications of standard wiring components ..................................................................................................... 50

9.2 To connect the electrical wiring to the outdoor unit ............................................................................................................ 50

9.1 About connecting the electrical wiring

Before connecting the electrical wiring

Make sure:

▪ The refrigerant piping is connected and checked

▪ The water piping is connected

Typical workflow

9 | Electrical installation

Connecting the electrical wiring typically consists of the following stages:

1 Making sure the power supply system complies with the electrical

specifications of the units.

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

9.1.1 Precautions when connecting the electrical wiring

WARNING

Appliance shall be installed in accordance with national wiring regulations.

DANGER: RISK OF ELECTROCUTION

INFORMATION

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

precautions"[45].

INFORMATION

Also read "9.1.3Specifications of standard wiring components"[450].

RXTM30+40N2V1B + RXTP25+35N2V1B9 + RXTP25+35N2V1B8 + ARXTP25+35N2V1B + RXTA30N2V1B R32 split series 4P518023-7H – 2020.08

WARNING

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

with the applicable legislation.

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

with the applicable legislation.

Installer reference guide