Daikin RXYSQ4T7V1B, RXYSQ5T7V1B, RXYSQ6T7V1B, RXYSQ4T7Y1B, RXYSQ5T7Y1B Installer reference guide

...

Installer and user

reference guide

VRV IV-S system air conditioner

RXYSQ4T7V1B RXYSQ5T7V1B RXYSQ6T7V1B             RXYSQ4T7Y1B RXYSQ5T7Y1B RXYSQ6T7Y1B

Installer and user reference guide

VRV IV-S system air conditioner

English

Table of Contents

1 General safety precautions 3

1.1 About the documentation .......................................................... 3

1.1.1 Meaning of warnings and symbols.............................. 3

1.2 For the user ............................................................................... 4

1.3 For the installer.......................................................................... 4

1.3.1 General ....................................................................... 4

1.3.2 Installation site ............................................................ 4

1.3.3 Refrigerant .................................................................. 5

1.3.4 Brine............................................................................ 5

1.3.5 Water .......................................................................... 5

1.3.6 Electrical ..................................................................... 6

2 About the documentation 6

2.1 About this document.................................................................. 6

For the installer 7

3 About the box 7

3.1 Overview: About the box ........................................................... 7

3.2 Outdoor unit............................................................................... 7

3.2.1 To unpack the outdoor unit ......................................... 7

3.2.2 To handle the outdoor unit.......................................... 7

3.2.3 To remove the accessories from the outdoor unit....... 8

4 About the units and options 8

4.1 Overview: About the units and options...................................... 8

4.2 Identification .............................................................................. 8

4.2.1 Identification label: Outdoor unit ................................. 8

4.3 About the outdoor unit ............................................................... 8

4.4 System layout............................................................................ 8

4.5 Combining units and options ..................................................... 9

4.5.1 About combining units and options............................. 9

4.5.2 Possible combinations of indoor units......................... 9

4.5.3 Possible options for the outdoor unit........................... 9

5 Preparation 9

5.1 Overview: Preparation............................................................... 9

5.2 Preparing installation site .......................................................... 9

5.2.1 Installation site requirements of the outdoor unit ........ 9

5.2.2 Additional installation site requirements of the

outdoor unit in cold climates ....................................... 11

5.2.3 Securing safety against refrigerant leaks.................... 11

5.3 Preparing refrigerant piping....................................................... 12

5.3.1 Refrigerant piping requirements.................................. 12

5.3.2 Refrigerant piping material.......................................... 12

5.3.3 To select the piping size ............................................. 13

5.3.4 To select refrigerant branch kits.................................. 13

5.3.5 Refrigerant piping length and height difference .......... 14

5.4 Preparing electrical wiring ......................................................... 15

5.4.1 About electrical compliance ........................................ 15

5.4.2 Safety device requirements ........................................ 15

6 Installation 15

6.1 Overview: Installation ................................................................ 15

6.2 Opening the units ...................................................................... 15

6.2.1 About opening the units .............................................. 15

6.2.2 To open the outdoor unit............................................. 16

6.3 Mounting the outdoor unit.......................................................... 16

6.3.1 About mounting the outdoor unit................................. 16

6.3.2 Precautions when mounting the outdoor unit.............. 16

6.3.3 To provide the installation structure............................ 16

6.3.4 To install the outdoor unit............................................ 16

6.3.5 To provide drainage.................................................... 16

6.3.6 To prevent the outdoor unit from falling over .............. 17

6.4 Connecting the refrigerant piping .............................................. 17

6.4.1 About connecting the refrigerant piping ....................... 17

6.4.2 Precautions when connecting the refrigerant piping.... 17

6.4.3 Guidelines when connecting the refrigerant piping...... 18

6.4.4 Pipe bending guidelines............................................... 18

6.4.5 To flare the pipe end .................................................... 18

6.4.6 To braze the pipe end .................................................. 18

6.4.7 Using the stop valve and service port .......................... 18

6.4.8 To connect the refrigerant piping to the outdoor unit ... 19

6.4.9 To connect the refrigerant branching kit ...................... 20

6.5 Checking the refrigerant piping .................................................. 20

6.5.1 About checking the refrigerant piping .......................... 20

6.5.2 Checking refrigerant piping: General guidelines.......... 21

6.5.3 Checking refrigerant piping: Setup............................... 21

6.5.4 To perform a leak test .................................................. 21

6.5.5 To perform vacuum drying ........................................... 22

6.6 To insulate the refrigerant piping................................................ 22

6.7 Charging refrigerant ................................................................... 22

6.7.1 About charging refrigerant ........................................... 22

6.7.2 Precautions when charging refrigerant ........................ 22

6.7.3 To determine the additional refrigerant amount........... 23

6.7.4 To charge refrigerant ................................................... 23

6.7.5 Error codes when charging refrigerant......................... 24

6.7.6 To fix the fluorinated greenhouse gases label ............. 24

6.8 Connecting the electrical wiring.................................................. 24

6.8.1 About connecting the electrical wiring.......................... 24

6.8.2 Precautions when connecting electrical wiring ............ 25

6.8.3 Guidelines when knocking out knockout holes ............ 26

6.8.4 Guidelines when connecting the electrical wiring ........ 26

6.8.5 To connect the electrical wiring on the outdoor unit..... 26

6.9 Finishing the outdoor unit installation ......................................... 28

6.9.1 To finish the transmission wiring.................................. 28

6.9.2 To close the outdoor unit ............................................. 28

7 Configuration 28

7.1 Overview: Configuration ............................................................. 28

7.2 Making field settings................................................................... 28

7.2.1 About making field settings .......................................... 28

7.2.2 To access the field setting components....................... 29

7.2.3 Field setting components ............................................. 29

7.2.4 To access mode 1 or 2 ................................................ 29

7.2.5 To use mode 1 ............................................................. 30

7.2.6 To use mode 2 ............................................................. 30

7.2.7 Mode 1 (and default situation): Monitoring settings ..... 30

7.2.8 Mode 2: Field settings.................................................. 31

7.2.9 To connect the PC configurator to the outdoor unit ..... 33

7.3 Energy saving and optimum operation....................................... 33

7.3.1 Available main operation methods............................... 33

7.3.2 Available comfort settings ............................................ 34

7.3.3 Example: Automatic mode during cooling.................... 35

7.3.4 Example: Automatic mode during heating ................... 35

8 Commissioning 36

8.1 Overview: Commissioning.......................................................... 36

8.2 Precautions when commissioning .............................................. 36

8.3 Checklist before commissioning................................................. 36

8.4 Checklist during commissioning ................................................. 37

8.4.1 About test run............................................................... 37

8.4.2 To perform a test run (7-LEDs display)........................ 37

8.4.3 Correcting after abnormal completion of the test run... 37

8.4.4 Operating the unit ........................................................ 37

9 Hand-over to the user 37

10 Maintenance and service 37

10.1 Overview: Maintenance and service .......................................... 38

10.2 Maintenance safety precautions................................................. 38

10.2.1 To prevent electrical hazards ....................................... 38

10.3 Checklist for yearly maintenance of the outdoor unit ................. 38

10.4 About service mode operation.................................................... 38

10.4.1 To use vacuum mode .................................................. 38

10.4.2 To recover refrigerant .................................................. 38

Installer and user reference guide

RXYSQ4~6T7V1B+Y1B

VRV IV-S system air conditioner

4P404676-1A – 2016.03

1 General safety precautions

11 Troubleshooting 38

11.1 Overview: Troubleshooting........................................................ 38

11.2 Precautions when troubleshooting ............................................ 39

11.3 Solving problems based on error codes .................................... 39

11.3.1 Error codes: Overview ................................................ 39

12 Disposal 40

13 Technical data 41

13.1 Overview: Technical data .......................................................... 41

13.2 Dimensions: Outdoor unit .......................................................... 41

13.3 Service space: Outdoor unit ...................................................... 42

13.4 Components: Outdoor unit ........................................................ 44

13.5 Piping diagram: Outdoor unit..................................................... 46

13.6 Wiring diagram: Outdoor unit .................................................... 47

13.7 Technical specifications: Outdoor unit....................................... 51

13.8 Capacity table: Indoor unit......................................................... 53

For the user 54

14 About the system 54

14.1 System layout ............................................................................ 54

15 User interface 54

16 Before operation 54

17 Operation 54

17.1 Operation range ........................................................................ 54

17.2 Operating the system ................................................................ 55

17.2.1 About operating the system ........................................ 55

17.2.2 About cooling, heating, fan only, and automatic

operation ..................................................................... 55

17.2.3 About the heating operation ........................................ 55

17.2.4 To operate the system (WITHOUT cool/heat

changeover remote control switch) ............................. 55

17.2.5 To operate the system (WITH cool/heat changeover

remote control switch)................................................. 55

17.3 Using the dry program ............................................................... 56

17.3.1 About the dry program ................................................ 56

17.3.2 To use the dry program (WITHOUT cool/heat

changeover remote control switch) ............................. 56

17.3.3 To use the dry program (WITH cool/heat changeover

remote control switch)................................................. 56

17.4 Adjusting the air flow direction................................................... 56

17.4.1 About the air flow flap ................................................. 56

17.5 Setting the master user interface .............................................. 57

17.5.1 About setting the master user interface ...................... 57

17.5.2 To designate the master user interface (VRV DX)...... 57

17.5.3 To designate the master user interface (RA DX) ........ 57

17.5.4 About control systems................................................. 57

18 Energy saving and optimum operation 57

18.1 Available main operation methods ............................................ 58

18.2 Available comfort settings ......................................................... 58

19 Maintenance and service 58

19.1 Maintenance after a long stop period ........................................ 58

19.2 Maintenance before a long stop period ..................................... 58

19.3 About the refrigerant.................................................................. 59

19.4 After-sales service and warranty ............................................... 59

19.4.1 Warranty period .......................................................... 59

19.4.2 Recommended maintenance and inspection .............. 59

19.4.3 Recommended maintenance and inspection cycles ... 59

19.4.4 Shortened maintenance and replacement cycles ....... 59

20.2.3 Symptom: Fan operation is possible, but cooling and

heating do not work...................................................... 61

20.2.4 Symptom: The fan strength does not correspond to

the setting .................................................................... 61

20.2.5 Symptom: The fan direction does not correspond to

the setting .................................................................... 61

20.2.6 Symptom: White mist comes out of a unit (Indoor

unit) .............................................................................. 62

20.2.7 Symptom: White mist comes out of a unit (Indoor

unit, outdoor unit) ......................................................... 62

20.2.8 Symptom: The user interface display reads "U4" or "U5" and stops, but then restarts after a few minutes.. 62

20.2.9 Symptom: Noise of air conditioners (Indoor unit) ......... 62

20.2.10 Symptom: Noise of air conditioners (Indoor unit,

outdoor unit)................................................................. 62

20.2.11 Symptom: Noise of air conditioners (Outdoor unit) ...... 62

20.2.12 Symptom: Dust comes out of the unit .......................... 62

20.2.13 Symptom: The units can give off odours...................... 62

20.2.14 Symptom: The outdoor unit fan does not spin ............. 62

20.2.15 Symptom: The display shows "88"............................... 62

20.2.16 Symptom: The compressor in the outdoor unit does

not stop after a short heating operation ....................... 62

20.2.17 Symptom: The inside of an outdoor unit is warm

even when the unit has stopped .................................. 62

20.2.18 Symptom: Hot air can be felt when the indoor unit is

stopped ........................................................................ 62

21 Relocation 62

22 Disposal 62

23 Glossary 62

1 General safety precautions

1.1 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 the installer reference guide must be performed by an authorized installer.

1.1.1 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

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

WARNING: FLAMMABLE MATERIAL

WARNING

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

20 Troubleshooting 60

20.1 Error codes: Overview ............................................................... 60

20.2 Symptoms that are not air conditioner troubles ......................... 61

20.2.1 Symptom: The system does not operate .................... 61

20.2.2 Symptom: Cool/Heat cannot be changed over ........... 61

RXYSQ4~6T7V1B+Y1B VRV IV-S system air conditioner 4P404676-1A – 2016.03

CAUTION

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

Installer and user reference guide

1 General safety precautions

NOTICE

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

INFORMATION

Indicates useful tips or additional information.

1.2 For the user

▪ If you are not sure how to operate the unit, contact your installer.

▪ This appliance can be used by children aged from 8 years and

above and persons with reduced physical, sensory or mental capabilities or lack of experience and knowledge if they have been given supervision or instruction concerning use of the appliance in a safe way and understand the hazards involved. Children shall not play with the appliance. Cleaning and user maintenance shall not be made by children without supervision.

WARNING

To prevent electric shocks or fire:

▪ Do NOT rinse the unit.

▪ Do NOT operate the unit with wet hands.

▪ Do NOT place any objects containing water on the unit.

NOTICE

▪ Do NOT place any objects or equipment on top of the

unit.

▪ Do NOT sit, climb or stand on the unit.

▪ 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: the dismantling of the system, treatment of the refrigerant, of oil and of other parts must be done by an authorized installer and must comply with applicable legislation. Units must be treated at a specialized 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.

▪ Batteries are marked with the following symbol:

This means that the batteries may not be mixed with unsorted household waste. If a chemical symbol is printed beneath the symbol, this chemical symbol means that the battery contains a heavy metal above a certain concentration. Possible chemical symbols are: Pb: lead (>0.004%). Waste batteries must be treated at a specialized treatment facility for reuse. By ensuring waste batteries are disposed of correctly, you will help to prevent potential negative consequences for the environment and human health.

1.3 For the installer

NOTICE

Improper installation or attachment of equipment or accessories could result in electric 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).

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.

DANGER: RISK OF BURNING

▪ 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

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 aluminum fins of the unit.

NOTICE

▪ 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.

1.3.1 General

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

Installer and user reference guide

1.3.2 Installation site

▪ Provide sufficient space around the unit for servicing and air

circulation.

▪ Make sure the installation site withstands the unit's weight and

vibration.

RXYSQ4~6T7V1B+Y1B

VRV IV-S system air conditioner

4P404676-1A – 2016.03

1 General safety precautions

▪ 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.

1.3.3 Refrigerant

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).

▪ In case re-charge is required, refer to 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")

A siphon tube is NOT present Charge with the cylinder upside

▪ 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.

Charge with the cylinder upright.

down.

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 may 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.

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.

WARNING

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

1.3.4 Brine

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.

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.

1.3.5 Water

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

RXYSQ4~6T7V1B+Y1B VRV IV-S system air conditioner 4P404676-1A – 2016.03

Installer and user reference guide

2 About the documentation

NOTICE

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

1.3.6 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 1 minute,

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, shall be installed in the fixed wiring.

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 electric 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.

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 below.

▪ 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.

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

WARNING

▪ After finishing the electrical work, confirm that each

electrical component and terminal inside the electrical components box is connected securely.

▪ Make sure all covers are closed before starting up the

unit.

NOTICE

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

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

2 About the documentation

2.1 About this document

Target audience

Authorised installers + end users

INFORMATION

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

Installer and user reference guide

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 and operation manual:

▪ Installation and operation instructions

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

RXYSQ4~6T7V1B+Y1B

VRV IV-S system air conditioner

4P404676-1A – 2016.03

3 About the box

▪ Installer and user reference guide:

▪ Preparation of the installation, technical specifications,

reference data,…

▪ Detailed step-by-step instructions and background information

for basic and advanced usage

For the installer

3 About the box

3.1 Overview: About the box

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

It contains information about:

▪ Unpacking and handling the units

▪ Removing the accessories from the units

Keep the following in mind:

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

must be reported immediately to the carrier's claims agent.

▪ 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:

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

and-manuals/product-information/

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

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

3.2 Outdoor unit

3.2.1 To unpack the outdoor unit

Fragile, handle the unit with care.

Keep the unit upright in order to avoid compressor damage.

▪ Choose on beforehand the path along which the unit is to be

brought in.

3.2.2 To handle the outdoor unit

Carry the unit slowly as shown:

CAUTION

To avoid injury, do NOT touch the air inlet or aluminum fins of the unit.

Forklift. As long as the unit remains on its pallet, you can also use a forklift.

RXYSQ4~6T7V1B+Y1B VRV IV-S system air conditioner 4P404676-1A – 2016.03

Installer and user reference guide

4 About the units and options

1×

e f

1× 1×

1×

d d

c c

3.2.3 To remove the accessories from the outdoor unit

1 Remove the service cover. See "6.2.2 To open the outdoor

unit"on page16.

2 Remove the accessories.

4.2.1 Identification label: Outdoor unit

Location

Model identification

Example: R X Y S Q 6 T7 Y1 B [*]

Code Explanation

R Outdoor air cooled

X Heat pump (no continuous heating)

Y Single module

S S series

Q Refrigerant R410A

4~6 Capacity class

T7 VRV IV series

B European market

[*] Minor model change indication

Power supply

a General safety precautions b Outdoor unit installation and operation manual c Fluorinated greenhouse gases label d Multilingual fluorinated greenhouse gases label e Gas piping accessory 1 + copper gasket (only for

RXYSQ6)

f Gas piping accessory 2 (only for RXYSQ6)

g Gas piping accessory 3 (only for RXYSQ6)

4 About the units and options

4.1 Overview: About the units and options

This chapter contains information about:

▪ Identification of the outdoor unit.

▪ Where the outdoor unit fits in the system layout.

▪ With which indoor units and options you can combine the outdoor

units.

4.2 Identification

NOTICE

When installing or servicing several units at the same time, make sure NOT to switch the service panels between different models.

4.3 About the outdoor unit

This installation manual concerns the VRV IV-S, full inverter driven, heat pump system.

These units are intended for outdoor installation and aimed for air to air heat pump applications.

Specification RXYSQ4~6

Capacity Heating 14.2~18.0kW

Cooling 12.1~15.5kW

Ambient design temperature

Heating –20~15.5°CWB

Cooling –5~46°CDB

4.4 System layout

NOTICE

Design of the system must not be done at temperatures below –15°C.

INFORMATION

Not all combinations of indoor units are allowed, for guidance, see "4.5.2 Possible combinations of indoor

units"on page9.

Installer and user reference guide

a VRV IV-S Heat pump outdoor unit b Refrigerant piping

RXYSQ4~6T7V1B+Y1B

VRV IV-S system air conditioner

4P404676-1A – 2016.03

5 Preparation

c VRV direct expansion (DX) indoor unit d User interface (dedicated depending on indoor unit type) e BP box (required to connect Residential Air (RA) or Sky Air

(SA) direct expansion (DX) indoor units)

f Residential Air (RA) direct expansion (DX) indoor units

g User interface (wireless, dedicated depending on indoor

unit type)

4.5 Combining units and options

4.5.1 About combining units and options

NOTICE

To be sure your system setup (outdoor unit+indoor unit(s)) will work, you have to consult the latest technical engineering data for VRV IV-S heat pump.

The VRV IV-S heat pump system can be combined with several types of indoor units and is intended for R410A use only.

For an overview which units are available you can consult the product catalogue for VRV IV-S.

An overview is given indicating the allowed combinations of indoor units and outdoor units. Not all combinations are allowed. They are subject to rules (combination between outdoor-indoor, combinations between indoor units, etc.) mentioned in the technical engineering data.

4.5.2 Possible combinations of indoor units

In general following type of indoor units can be connected to a VRV IV-S heat pump system. The list is non-exhaustive and is depending on both outdoor unit model and indoor unit model combinations.

▪ VRV direct expansion (DX) indoor units (air to air applications).

▪ SA/RA (Sky Air/Residential Air) direct expansion (DX) indoor units

(air to air applications). Further referred to as RADX indoor units. These indoor units require a BP box.

▪ AHU (air to air applications): EKEXV-kit+EKEQ-box are required,

depending on application.

▪ Aircurtain (air to air applications): CYV/CAV (Biddle) series,

depending on application.

INFORMATION

▪ Combination of VRVDX and RADX indoor units is not

allowed.

▪ Combination of RA DX and AHU indoor units is not

allowed.

▪ Combination of RADX and aircurtain indoor units is not

allowed.

4.5.3 Possible options for the outdoor unit

INFORMATION

Refer to the technical engineering data for the latest option names.

Refrigerant branching kit

Description Model name

Refnet header KHRQ22M29H

Refnet joint KHRQ22M20T

For the selection of the optimal branching kit, please refer to

"5.3.4To select refrigerant branch kits"on page13.

Cool/heat selector

In order to control the cooling or heating operation from a central location, the following option can be connected:

Description RXYSQ4~6_V1 RXYSQ4~6_Y1

Cool/heat selector switch

Cool/heat selector PCB

Cool/heat selector cable

With optional fixing box for the switch

External control adaptor (DTA104A61/62)

To instruct specific operation with an external input coming from a central control the external control adaptor can be used. Instructions (group or individual) can be instructed for low noise operation and power consumption limitation operation.

The external control adapter has to be installed in the indoor unit.

PC configurator cable (EKPCCAB)

You can make several commissioning field settings through a personal computer interface. For this option EKPCCAB is required which is a dedicated cable to communicate with the outdoor unit. The user interface software is available on http://

www.daikineurope.com/support-and-manuals/software-downloads/.

KRC19-26A KRC19-26A

EBRP2B —

— EKCHSC

KJB111A KJB111A

5 Preparation

5.1 Overview: Preparation

This chapter describes what you have to do and know before going on-site.

It contains information about:

▪ Preparing the installation site

▪ Preparing the refrigerant piping

▪ Preparing the electrical wiring

5.2 Preparing 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 the installation location with sufficient place for carrying the unit in and out of the site.

5.2.1 Installation site requirements of the outdoor unit

INFORMATION

5.2.2 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.

5 Preparation

NOTICE

When operating the unit in heating in a low outdoor ambient temperature with high humidity conditions, make sure to take precautions to keep the drain holes of the unit free by using proper equipment.

In heating:

a Snow cover or shed b Pedestal (minimum height = 150mm) c Prevailing wind direction d Air outlet

RXYSQ4~6T7V1B+Y1B VRV IV-S system air conditioner 4P404676-1A – 2016.03

a Warming up operation range

b Operation range

TAI Ambient indoor temperature

TAO Ambient outdoor temperature

If the unit is selected to operate at ambient temperatures lower than –5°C for 5 days or longer, with relative humidity levels exceeding 95%, we recommend to apply a Daikin range specifically designed for such application and/or to contact your dealer for further advice.

5.2.3 Securing safety against refrigerant leaks

About safety against refrigerant leaks

The installer and system specialist shall secure safety against leakage according to local regulations or standards. The following standards may be applicable if local regulations are not available.

This system uses R410A as refrigerant. R410A itself is an entirely safe non-toxic, non-combustible refrigerant. Nevertheless care must be taken to ensure that air conditioning facilities are installed in a room which is sufficiently large. This assures that the maximum concentration level of refrigerant gas is not exceeded, in the unlikely event of major leak in the system and this in accordance to the local applicable regulations and standards.

About the maximum concentration level

The maximum charge of refrigerant and the calculation of the maximum concentration of refrigerant is directly related to the humanly occupied space in to which it could leak.

The unit of measurement of the concentration is kg/m3 (the weight in kg of the refrigerant gas in 1m3 volume of the occupied space).

Compliance to the local applicable regulations and standards for the maximum allowable concentration level is required.

According to the appropriate European Standard, the maximum allowed concentration level of refrigerant to a humanly space for R410A is limited to 0.44 kg/m3.

Installer and user reference guide

5 Preparation

a Direction of the refrigerant flow b Room where refrigerant leak has occurred (outflow of all

the refrigerant from the system)

Pay special attention to places, such as basements etc., where refrigerant can stay, since refrigerant is heavier than air.

To check the maximum concentration level

Check the maximum concentration level in accordance with steps 1 to 4 below and take whatever action is necessary to comply.

1 Calculate the amount of refrigerant (kg) charged to each system

separately.

Formula A+B=C

A Amount of refrigerant in a single unit system

(amount of refrigerant with which the system is charged before leaving the factory)

B Additional charging amount (amount of

refrigerant added locally in accordance with the length or diameter of the refrigerant piping)

C Total amount of refrigerant (kg) in the

system

NOTICE

Where a single refrigerant facility is divided into 2 entirely independent refrigerant systems, use the amount of refrigerant with which each separate system is charged.

2 Calculate the volume of the room (m3) where the indoor unit is

installed. In a case such as the following, calculate the volume of (D), (E) as a single room or as the smallest room.

D Where there are no smaller room divisions:

3 Calculate the refrigerant density using the results of the

calculations in steps 1 and 2 above. If the result of the above calculation exceeds the maximum concentration level, a ventilation opening to the adjacent room shall be made.

Formula F/G≤H

F Total volume of refrigerant in the refrigerant

system

G Size (m3) of smallest room in which there is

an indoor unit installed

H Maximum concentration level (kg/m3)

4 Calculate the refrigerant density taking the volume of the room

where the indoor unit is installed and the adjacent room. Install ventilation openings in the door of adjacent rooms until the refrigerant density is smaller than the maximum concentration level.

5.3 Preparing refrigerant piping

5.3.1 Refrigerant piping requirements

INFORMATION

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

NOTICE

The refrigerant R410A requires strict cautions for keeping the system clean, dry and tight.

▪ Clean and dry: foreign materials (including mineral oils

or moisture) should be prevented from getting mixed into the system.

▪ Tight: R410A does not contain any chlorine, does not

destroy the ozone layer, and does not reduce earth's protection against harmful ultraviolet radiation. R410A can contribute slightly to the greenhouse effect if it is released. Therefore we should take special attention to check the tightness of the installation.

NOTICE

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

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

be ≤30 mg/10 m.

5.3.2 Refrigerant piping material

▪ Piping material: Phosphoric acid deoxidised seamless copper.

E Where there is a room division, but there is an opening

between the rooms sufficiently large to permit a free flow of air back and forth.

a Opening between the rooms

b Partition (Where there is an opening without a door

or where there are openings above and below the door which are each equivalent in size to 0.15% or more of the floor area.)

Installer and user reference guide

▪ Piping temper grade and thickness:

Outer diameter

(Ø)

6.4mm (1/4")

9.5mm (3/8")

12.7mm (1/2")

15.9mm (5/8") Annealed (O) ≥0.99mm

19.1mm (3/4") Half hard (1/2H) ≥0.80mm

(a) Depending on the applicable legislation and the unit's

▪ Flare connections: Only use annealed material.

Temper grade Thickness (t)

Annealed (O) ≥0.80mm

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

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(a)

5 Preparation

B-1 B-2

C-1 C-2 C-3 C-4 E E E E

1 1

3-1 3-2 3-3 3-4

RA DXVRV DX

5 5 5 5

2 2

b c

5.3.3 To select the piping size

Determine the proper size referring to following tables and reference figure (only for indication).

INFORMATION

▪ Combination of VRVDX and RADX indoor units is not

allowed.

▪ Combination of RA DX and AHU indoor units is not

allowed.

▪ Combination of RADX and aircurtain indoor units is not

allowed.

INFORMATION

If you install RA DX indoor units, you have to configure field setting [2‑38] (= type of installed indoor units). See

"7.2.8Mode 2: Field settings"on page31.

1 Outdoor unit 2 Refrigerant branch kits

3-1~3-4 VRVDX indoor units

4 BP units 5 RADX indoor units

A Piping between outdoor unit and (first) refrigerant branch

B-1 B-2 Piping between refrigerant branch kits

C-1~C-4 Piping between refrigerant branch kit and indoor unit

In case the required pipe sizes (inch sizes) are not available, it is also allowed to use other diameters (mm sizes), taken the following into account:

▪ Select the pipe size nearest to the required size.

▪ Use the suitable adapters for the change-over from inch tomm

pipes (field supply).

▪ The additional refrigerant calculation has to be adjusted as

mentioned in "6.7.3 To determine the additional refrigerant

amount"on page23.

kit

D Piping between refrigerant branch kit and BP unit E Piping between BP unit and RADX indoor unit

A: Piping between outdoor unit and (first) refrigerant branch kit

When the equivalent pipe length between outdoor and indoor units is 90m or more, the size of the main gas pipe must be increased (sizeup). If the recommended gas pipe (size-up) is not available, you must use the standard size (which might result in a small capacity decrease).

a Outdoor unit

RXYSQ4~6T7V1B+Y1B VRV IV-S system air conditioner 4P404676-1A – 2016.03

b Main gas pipe c Increase d First refrigerant branch kit e Indoor unit

Outdoor unit

capacity type (HP)

4+5 15.9 19.1 9.5

6 19.1 22.1

Piping outer diameter size (mm)

Gas pipe Liquid pipe

Standard Size-up

B: Piping between refrigerant branch kits

Choose from the following table in accordance with the indoor unit total capacity type, connected downstream. Do not let the connection piping exceed the refrigerant piping size chosen by the general system model name.

Indoor unit capacity

index

<150 15.9 9.5

150≤x≤182 19.1

Example: Downstream capacity for B-1 = capacity index of unit 3-1 + capacity index of unit 3-2

Piping outer diameter size (mm)

Gas pipe Liquid pipe

C: Piping between refrigerant branch kit and indoor unit

Use the same diameters as the connections (liquid, gas) on the indoor units. The diameters of the indoor units are as follows:

Indoor unit capacity

index

15~50 12.7 6.4

63~140 15.9 9.5

Piping outer diameter size (mm)

Gas pipe Liquid pipe

D: Piping between refrigerant branch kit and BP unit

Total capacity index of connected indoor

units

15~62 12.7 6.4

63~149 15.9 9.5

150~182 19.1

Piping outer diameter size (mm)

Gas pipe Liquid pipe

E: Piping between BP unit and RA DX indoor unit

Indoor unit capacity

index

15~42 9.5 6.4

50 12.7

60 9.5

71 15.9

Piping outer diameter size (mm)

Gas pipe Liquid pipe

5.3.4 To select refrigerant branch kits

For piping example, refer to "5.3.3 To select the piping size" on

page13.

Refnet joint at first branch (counting from outdoor unit)

When using refnet joints at the first branch counted from the outdoor unit side, choose from the following table in accordance with the capacity of the outdoor unit. Example: Refnet joint A→B‑1.

Outdoor unit capacity type

(HP)

4~6 KHRQ22M20T

Refrigerant branch kit

Installer and user reference guide

5 Preparation

Refnet joints at other branches

For refnet joints other than the first branch, select the proper branch kit model based on the total capacity index of all indoor units connected after the refrigerant branch. Example: Refnet joint B‑1→C‑1.

Indoor unit capacity index Refrigerant branch kit

<182 KHRQ22M20T

Refnet headers

Concerning refnet headers, choose from the following table in accordance with the total capacity of all the indoor units connected below the refnet header.

Indoor unit capacity index Refrigerant branch kit

<182 KHRQ22M29H

INFORMATION

Maximum 8 branches can be connected to a header.

5.3.5 Refrigerant piping length and height difference

The piping lengths and height differences must comply with the following requirements. Two patterns will be discussed:

• Outdoor with 100% VRVDX indoor units

• Outdoor with 100% RADX indoor units

Requirement Limit

VRVDX RADX

Maximum actual piping length

▪ Example 1.1, unit8: a+b+c+d+e+f+g+p≤Limit

▪ Example 1.2, unit6: a+b+h≤Limit

▪ Example 1.2, unit8: a+i+k≤Limit

▪ Example 1.3, unit8: a+i≤Limit

▪ Example 2, unit18: a+b+m≤Limit

Maximum equivalent piping length

Maximum total piping length

▪ Example 1.1: a+b+c+d+e+f+g+h+i+j+k+l+m+n+p≤Limit

▪ Example 2: a+b+c+d+e+f+g+h+i+j+k+l+m≤Limit

Minimum length outdoor-first refrigerant branch kit

▪ Example 2: Limit≤a

Maximum length first branch kit-indoor unit

▪ Example 1.1, unit8: b+c+d+e+f+g+p≤Limit

▪ Example 1.2, unit6: b+h≤Limit

▪ Example 1.2, unit8: i+k≤Limit

▪ Example 1.3, unit8: i≤Limit

▪ Example 2, unit18: b+m≤Limit

Maximum length outdoor-BP

▪ Example 2, BP3: a+b≤Limit

Minimum and maximum length BP-indoor

▪ Example 2, unit 18: Min.≤m≤Max.

Maximum height difference outdoor-indoor Outdoor higher than indoor

Maximum height difference indoor-indoor

▪ Examples: H2≤Limit

Maximum height difference outdoor-BP

▪ Example 2: H3≤Limit

Maximum height difference BP-BP

▪ Example 2: H4≤Limit

Maximum height difference BP-indoor

▪ Example 2: H5≤Limit

(a) Assume equivalent piping length of refnet joint=0.5m and refnet header=1m (for calculation purposes of equivalent piping length, not for

refrigerant charge calculations).

(a)

Indoor unit capacity index<60 N/A 2~15m

Indoor unit capacity index=60 N/A 2~12m

Indoor unit capacity index=71 N/A 2~8m

▪ Examples: H1≤Limit

Outdoor lower than indoor 40m

120m 65m

150m 85m

300m 140m

N/A 5m

40m 40m

N/A 55m

50m 30m

15m 15m

N/A 30m

N/A 15m

N/A 5m

Installer and user reference guide

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Example 1 (VRVDX indoor units) Example 2 (RADX indoor units)

h i j k l m n

B C D E F G

b c d e f

1 2 3 4 5 6 7

BP1

BP3

131211

BP2

161514

c d e f

g h

A B

1 2 3 4 5 6

7 8

b d e fig h

1 2 3 4 5 6 7

Example 1.1

Example 1.2

Example 1.3

Refnet joint Refnet header

BP box

1~8 VRVDX indoor units

11~18 RADX indoor units

6 Installation

5.4 Preparing electrical wiring

5.4.1 About electrical compliance

Only for RXYSQ4~6_V1

Equipment complying with EN/IEC 61000‑3‑12 (European/ International Technical Standard setting the limits for harmonic currents produced by equipment connected to public low-voltage systems with input current >16A and ≤75A per phase.).

5.4.2 Safety device requirements

The power supply must be protected with the required safety devices, i.e. a main switch, a slow blow fuse on each phase and an earth leakage protector in accordance with the applicable legislation.

Selection and sizing of the wiring should be done in accordance with the applicable legislation based on the information mentioned in the table below.

Model Minimum circuit

RXYSQ4_V1 29.1A 32A 1~ 50Hz

RXYSQ5_V1

RXYSQ6_V1

RXYSQ4_Y1 14.1A 16A 3N~ 50Hz

RXYSQ5_Y1

RXYSQ6_Y1

Transmission wiring

Transmission wiring Vinyl cords with 0.75 to 1.25mm²

Maximum wiring length

(= distance between outdoor and furthest indoor unit)

Total wiring length

(= distance between outdoor and all indoors)

RXYSQ4~6T7V1B+Y1B VRV IV-S system air conditioner 4P404676-1A – 2016.03

ampacity

If the total transmission wiring exceeds these limits, it may result in communication error.

6 Installation

6.1 Overview: Installation

This chapter describes what you have to do and know on-site to install the system.

Typical workflow

Installation typically consists of the following stages:

▪ Mounting the outdoor unit.

▪ Mounting the indoor units.

▪ Connecting the refrigerant piping.

▪ Checking the refrigerant piping.

Recommended

fuses

sheath or cables (2‑core wires)

300m

600m

Power supply

220-240V

380-415V

▪ Charging refrigerant.

▪ Connecting the electrical wiring.

▪ Finishing the outdoor installation.

▪ Finishing the indoor installation.

INFORMATION

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.

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

Installer and user reference guide

6 Installation

1×

(mm)

>150

620

350

(345-355)

4× M12

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

a Make sure not to cover the drain holes.

INFORMATION

The recommended height of the upper protruding part of the bolts is 20mm.

6.3 Mounting the outdoor unit

6.3.1 About mounting the outdoor unit

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 outdoor unit from falling over.

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

cover and baffle plates. See "Preparing installation site" in

"5Preparation"on page9.

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 anchor bolts, nuts and washers (field supply) as follows:

NOTICE

Fix the outdoor unit to the foundation bolts using nuts with resin washers (a). If the coating on the fastening area is stripped off, the nuts rust easily.

6.3.4 To install the outdoor unit

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 a proper

drainage in order to avoid ice accumulation.

▪ Prepare a water drainage channel around the foundation to drain

waste water surrounding the unit.

▪ Avoid drain water flowing over the footpath, so that it does not

become slippery in case of ambient freezing temperatures.

Installer and user reference guide

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6 Installation

≥150 mm

117

102

376

191

a a a

▪ 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 the invasion of water in the unit and to avoid the drain water dripping (see the following illustration).

NOTICE

If drain holes of the outdoor unit are covered by a mounting base or by floor surface, raise the unit to provide a free space of more than 150mm under the outdoor unit.

Drain holes (dimensions in mm)

Typical workflow

Connecting the refrigerant piping involves:

▪ Connecting the refrigerant piping to the outdoor unit

▪ Connecting refrigerant branch kits

▪ Connecting the refrigerant piping to the indoor units (see the

installation manual of the indoor units)

▪ Insulating the refrigerant piping

▪ Keeping in mind the guidelines for:

▪ Pipe bending

▪ Flaring pipe ends

▪ Brazing

▪ Using the stop valves

6.4.2 Precautions when connecting the refrigerant piping

INFORMATION

Also read the precautions and requirements in the following chapters:

▪ General safety precautions

▪ Preparation

DANGER: RISK OF BURNING

a Drain holes

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 cable from scratching the paint (field supply).

4 Attach the cable’s ends. Tighten those ends.

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 R410A when adding refrigerant.

▪ Only use installation tools (e.g. manifold gauge set) that

are exclusively used for R410A installations to withstand the pressure and to prevent foreign materials (e.g. mineral oils and moisture) from mixing into the system.

▪ Install the piping so that the flare is NOT subjected to

mechanical stress

▪ Protect the piping as described in the following table to

prevent dirt, liquid or dust from entering the piping.

▪ Use caution when passing copper tubes through walls

(see figure below).

Unit Installation period Protection method

Outdoor unit >1month Pinch the pipe

<1month Pinch or tape the pipe

Indoor unit Regardless of the

period

6.4 Connecting the refrigerant piping

6.4.1 About connecting the refrigerant piping

Before connecting the refrigerant piping

Make sure the outdoor and indoor units are mounted.

RXYSQ4~6T7V1B+Y1B VRV IV-S system air conditioner 4P404676-1A – 2016.03

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.

Installer and user reference guide

6 Installation

a b

R=0.4~0.8

45°

±2

90°

±2

a b

≤Ø25.4

a b c d e

6.4.3 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 two 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)

Ø6.4 15~17 8.7~9.1

Ø9.5 33~39 12.8~13.2

Ø12.7 50~60 16.2~16.6

Ø15.9 63~75 19.3~19.7

Ø19.1 90~110 23.6~24.0

Tightening

torque (N•m)

Flare

dimensions (A)

(mm)

Flare shape

(mm)

Conventional flare tool

Flare tool for

R410A (clutch

type)

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 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.

6.4.6 To braze the pipe end

NOTICE

Precautions when connecting field piping. Add brazing material as shown in the figure.

▪ When brazing, blow through with nitrogen to prevent creation of

large quantities of oxidised film on the inside of the piping. This film adversely affects valves and compressors in the refrigerating system and prevents proper operation.

▪ Set the nitrogen pressure to 20kPa (just enough so it can be felt

on the skin) with a pressure-reducing valve.

6.4.4 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).

6.4.5 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 downward so that the

chips do not enter the pipe.

a Cut exactly at right angles. b Remove burrs.

3 Remove the flare nut from the stop valve and put the flare nut

on the pipe.

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

following illustration.

a Refrigerant piping b Part to be brazed c Taping d Manual valve e Pressure-reducing valve

f Nitrogen

▪ Do NOT use anti-oxidants when brazing pipe joints.

Residue can clog pipes and break equipment.

▪ Do NOT use flux when brazing copper-to-copper refrigerant

piping. Use phosphor copper brazing filler alloy (BCuP), which does not require flux. Flux has an extremely harmful influence on refrigerant piping systems. For instance, if chlorine based flux is used, it will cause pipe corrosion or, in particular, if the flux contains fluorine, it will deteriorate the refrigerant oil.

6.4.7 Using the stop valve and service port

To handle the stop valve

▪ Make sure to keep all stop valves open during operation.

▪ The figure below shows the name of each part required in

handling the stop valve.

▪ The stop valve is factory closed.

Installer and user reference guide

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VRV IV-S system air conditioner

4P404676-1A – 2016.03

a Service port and service port cover

a b

cde

b d

4× Ø6 mm

b Stop valve c Field piping connection d Stop valve cover

6 Installation

To handle the service port

▪ 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, make sure to tighten the service

port cover securely. For the tightening torque, refer to the table below.

▪ Check for refrigerant leaks after tightening the service port cover.

Tightening torques

a Service port b Stop valve cover c Hexagon hole d Shaft e Seal

To open the stop valve

1 Remove the stop valve cover.

2 Insert a hexagon wrench into the stop valve and turn the stop

valve counterclockwise.

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

Result: The valve is now open.

Stop valve

size (mm)

Ø9.5 5.4~6.6 4mm 13.5~16.5 11.5~13.9

Ø15.9 13.5~16.5 6mm 22.5~27.5

Tightening torque N•m (turn clockwise to close)

Shaft

Valve body Hexagonal

wrench

Cap (valve

lid)

Service

port

6.4.8 To connect the refrigerant piping to the outdoor unit

NOTICE

Be sure that the field installed piping does not touch other pipes, the bottom panel or side panel. Especially for the bottom and side connection, be sure to protect the piping with suitable insulation, to prevent it from coming into contact with the casing.

1 Do the following:

▪ Remove the service cover (a) with screw (b). ▪ Remove the piping intake plate (c) with screw (d).

To close the stop valve

1 Remove the stop valve cover.

2 Insert a hexagon wrench into the stop valve and turn the stop

valve clockwise.

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

Result: The valve is now closed.

Closing direction:

To handle the stop valve cover

▪ The stop valve cover is sealed where indicated by the arrow. Take

care not to damage it.

▪ After handling the stop valve, make sure to tighten the stop valve

cover securely. For the tightening torque, refer to the table below.

▪ Check for refrigerant leaks after tightening the stop valve cover.

RXYSQ4~6T7V1B+Y1B VRV IV-S system air conditioner 4P404676-1A – 2016.03

2 Choose a piping route (a, b, c or d).

3 If you have chosen the downwards piping route:

▪ Drill (a, 4×) and remove the knockout hole (b). ▪ Cut out the slits (c) with a metal saw.

Installer and user reference guide

6 Installation

e1 ecdf

d e f

d e1 e f

Refrigerant piping works are finished?

The indoor units and/or outdoor unit were already powered ON?

Use procedure: "Method 2: After power ON".

Finish piping work.

Use procedure: "Method 1: Before power ON

(regular method)".

Yes

4 Do the following:

▪ Connect the liquid pipe (a) to the liquid stop valve. ▪ Connect the gas pipe (b) to the gas stop valve.

▪ In case of RXYSQ6: Connect the gas piping accessories (c,

c1, d, e), and cut them to the required length (e1). This is necessary because the size of the gas stop valve is Ø15.9 while the piping between outdoor unit and first refrigerant branch kit is Ø19.1.

Possibility 1: To the front

Possibility 2: To the back

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.

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.

6.4.9 To connect the refrigerant branching kit

For installation of the refrigerant branching kit, refer to the installation manual delivered with the kit.

▪ Mount the refnet joint so that it branches either horizontally or

vertically.

▪ Mount the refnet header so that it branches horizontally.

Possibility 3: To the side

c, c1 Gas piping accessory 1 + copper gasket (always use it)

e, e1 Gas piping accessory 3 (cut it to the required length)

5 Reattach the service cover and the piping intake plate.

6 Seal all gaps (example: a) to prevent snow and small animals

from entering the system.

Installer and user reference guide

d Gas piping accessory 2

f Field supply

Possibility 4: Downwards

a Horizontal surface b Refnet joint mounted vertically c Refnet joint mounted horizontally

6.5 Checking the refrigerant piping

6.5.1 About checking the refrigerant piping

It is very important that all refrigerant piping work is done before the units (outdoor or indoor) are powered on.

When the units are powered on, the expansion valves will initialise. This means that they will close. Leak test and vacuum drying of field piping and indoor units is impossible when this happens.

RXYSQ4~6T7V1B+Y1B

VRV IV-S system air conditioner

4P404676-1A – 2016.03

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