Daikin RYYQ8T7Y1B, RYYQ10T7Y1B, RYYQ12T7Y1B, RYYQ14T7Y1B, RYYQ16T7Y1B* Installer reference guide

...

Installer and user

reference guide

VRV IV system air conditioner

RYYQ8T7Y1B* RYYQ10T7Y1B* RYYQ12T7Y1B* RYYQ14T7Y1B* RYYQ16T7Y1B* RYYQ18T7Y1B* RYYQ20T7Y1B*     RYMQ8T7Y1B* RYMQ10T7Y1B* RYMQ12T7Y1B* RYMQ14T7Y1B* RYMQ16T7Y1B* RYMQ18T7Y1B* RYMQ20T7Y1B*     RXYQ8T7Y1B* RXYQ10T7Y1B* RXYQ12T7Y1B* RXYQ14T7Y1B* RXYQ16T7Y1B* RXYQ18T7Y1B* RXYQ20T7Y1B*

Installer and user reference guide

VRV IV 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 ............................................................ 5

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

1.3.4 Brine............................................................................ 6

1.3.5 Water .......................................................................... 6

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

2 About the documentation 7

2.1 About this document.................................................................. 7

For the installer 7

3 About the box 7

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

3.2 To unpack the outdoor unit........................................................ 7

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

3.4 Accessory pipes: Diameters...................................................... 8

3.5 To remove the transportation stay............................................. 8

4 About the units and options 8

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

4.2 Identification label: Outdoor unit................................................ 9

4.3 About the outdoor unit ............................................................... 9

4.4 System layout............................................................................ 9

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 combinations of outdoor units ...................... 10

4.5.4 Possible options for the outdoor unit........................... 10

6.4.1 Precautions when connecting refrigerant piping.......... 22

6.4.2 About connecting the refrigerant piping ....................... 22

6.4.3 To route the refrigerant piping...................................... 23

6.4.4 To connect the refrigerant piping to the outdoor unit ... 23

6.4.5 To connect the multi connection piping kit................... 23

6.4.6 Multiple outdoor units: Knockout holes ........................ 24

6.4.7 To connect the refrigerant branching kit ...................... 24

6.4.8 To protect against contamination................................. 24

6.4.9 To braze the pipe end .................................................. 24

6.4.10 Using the stop valve and service port .......................... 24

6.4.11 To remove the pinched pipes....................................... 25

6.5 Checking the refrigerant piping .................................................. 26

6.5.1 About checking the refrigerant piping .......................... 26

6.5.2 Checking refrigerant piping: General guidelines.......... 26

6.5.3 Checking refrigerant piping: Setup............................... 27

6.5.4 To perform a leak test .................................................. 27

6.5.5 To perform vacuum drying ........................................... 27

6.6 To insulate the refrigerant piping................................................ 27

6.7 Charging refrigerant ................................................................... 28

6.7.1 Precautions when charging refrigerant ........................ 28

6.7.2 About charging refrigerant ........................................... 28

6.7.3 To determine the additional refrigerant amount........... 28

6.7.4 To charge refrigerant: Flow chart................................. 29

6.7.5 To charge refrigerant ................................................... 31

6.7.6 Step 6a: To automatically charge refrigerant............... 32

6.7.7 Step 6b: To manually charge refrigerant...................... 33

6.7.8 Error codes when charging refrigerant......................... 34

6.7.9 Checks after charging refrigerant................................. 34

6.7.10 To fix the fluorinated greenhouse gases label ............. 34

6.8 Connecting the electrical wiring.................................................. 34

6.8.1 Precautions when connecting electrical wiring ............ 34

6.8.2 Field wiring: Overview.................................................. 35

6.8.3 About the electrical wiring ............................................ 35

6.8.4 Guidelines when knocking out knockout holes ............ 36

6.8.5 To route and fix the transmission wiring ...................... 36

6.8.6 To connect the transmission wiring.............................. 36

6.8.7 To finish the transmission wiring.................................. 37

6.8.8 To route and fix the power supply................................ 37

6.8.9 To connect the power supply ....................................... 37

5 Preparation 10

5.1 Overview: Preparation............................................................... 10

5.2 Preparing installation site .......................................................... 11

5.2.1 Installation site requirements of the outdoor unit ........ 11

5.2.2 Additional installation site requirements of the

outdoor unit in cold climates ....................................... 12

5.2.3 Securing safety against refrigerant leaks.................... 12

5.3 Preparing refrigerant piping....................................................... 13

5.3.1 Refrigerant piping requirements.................................. 13

5.3.2 To select the piping size ............................................. 13

5.3.3 To select refrigerant branch kits.................................. 15

5.3.4 About the piping length ............................................... 15

5.3.5 Piping length: VRV DX only ........................................ 16

5.3.6 Piping length: VRV DX and Hydrobox ........................ 17

5.3.7 Piping length: VRV DX and RA DX............................. 18

5.3.8 Requirements in case of FXTQ indoor units............... 18

5.3.9 Multiple outdoor units: Possible layouts...................... 19

5.4 Preparing electrical wiring ......................................................... 20

5.4.1 About electrical compliance ........................................ 20

5.4.2 Safety device requirements ........................................ 20

6 Installation 21

6.1 Overview: Installation ................................................................ 21

6.2 Opening the units ...................................................................... 21

6.2.1 To open the outdoor unit............................................. 21

6.2.2 To open the electrical component box of the outdoor

unit .............................................................................. 21

6.3 Mounting the outdoor unit.......................................................... 22

6.3.1 To provide the installation structure............................ 22

6.4 Connecting the refrigerant piping .............................................. 22

7 Configuration 38

7.1 Overview: Configuration ............................................................. 38

7.2 Making field settings................................................................... 38

7.2.1 About making field settings .......................................... 38

7.2.2 Field setting components ............................................. 38

7.2.3 To access the field setting components....................... 39

7.2.4 To access mode 1 or 2 ................................................ 39

7.2.5 To use mode 1 ............................................................. 39

7.2.6 To use mode 2 ............................................................. 40

7.2.7 Mode 1: Monitoring settings......................................... 40

7.2.8 Mode 2: Field settings.................................................. 41

7.2.9 To connect the PC configurator to the outdoor unit ..... 44

7.3 Energy saving and optimum operation....................................... 44

7.3.1 Available main operation methods............................... 44

7.3.2 Available comfort settings ............................................ 45

7.3.3 Example: Automatic mode during cooling.................... 46

7.3.4 Example: Automatic mode during heating ................... 46

7.4 Using the leak detection function ............................................... 47

7.4.1 About automatic leak detection.................................... 47

7.4.2 To manually perform a leak detection.......................... 47

8 Commissioning 47

8.1 Overview: Commissioning.......................................................... 47

8.2 Precautions when commissioning .............................................. 48

8.3 Checklist before commissioning................................................. 48

8.4 About test run ............................................................................. 48

8.5 To perform a test run.................................................................. 49

8.6 Correcting after abnormal completion of the test run ................. 49

8.7 Operating the unit....................................................................... 50

Installer and user reference guide

RYYQ+RYMQ+RXYQ8~20T7Y1B

VRV IV system air conditioner

4P370475-1B – 2016.07

1 General safety precautions

9 Maintenance and service 50

9.1 Overview: Maintenance and service ......................................... 50

9.2 Maintenance safety precautions................................................ 50

9.2.1 To prevent electrical hazards...................................... 50

9.3 About service mode operation................................................... 50

9.3.1 To use vacuum mode ................................................. 50

9.3.2 To recover refrigerant ................................................. 50

10 Troubleshooting 51

10.1 Overview: Troubleshooting........................................................ 51

10.2 Solving problems based on error codes .................................... 51

10.3 Error codes: Overview ............................................................... 51

11 Disposal 54

12 Technical data 55

12.1 Overview: Technical data .......................................................... 55

12.2 Dimensions: Outdoor unit .......................................................... 55

12.3 Service space: Outdoor unit ...................................................... 56

12.4 Components: Outdoor unit ........................................................ 57

12.5 Components: Electrical component box .................................... 63

12.6 Piping diagram: Outdoor unit..................................................... 64

12.7 Wiring diagram: Outdoor unit .................................................... 67

12.8 Technical specifications: Outdoor unit....................................... 76

12.9 Capacity table: Indoor unit......................................................... 78

For the user 79

13 About the system 79

13.1 System layout ............................................................................ 79

14 User interface 79

15 Before operation 79

16 Operation 80

16.1 Operation range ........................................................................ 80

16.2 Operating the system ................................................................ 80

16.2.1 About operating the system ........................................ 80

16.2.2 About cooling, heating, fan only, and automatic

operation ..................................................................... 80

16.2.3 About the heating operation ........................................ 80

16.2.4 To operate the system (WITHOUT cool/heat

changeover remote control switch) ............................. 80

16.2.5 To operate the system (WITH cool/heat changeover

remote control switch)................................................. 81

16.3 Using the dry program ............................................................... 81

16.3.1 About the dry program ................................................ 81

16.3.2 To use the dry program (WITHOUT cool/heat

changeover remote control switch) ............................. 81

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

remote control switch)................................................. 81

16.4 Adjusting the air flow direction................................................... 81

16.4.1 About the air flow flap ................................................. 81

16.5 Setting the master user interface .............................................. 82

16.5.1 About setting the master user interface ...................... 82

16.5.2 To designate the master user interface (VRV DX and

Hydrobox) ................................................................... 82

16.5.3 To designate the master user interface (VRV DX and

RA DX)........................................................................ 82

16.6 About control systems ............................................................... 82

17 Energy saving and optimum operation 83

17.1 Available main operation methods ............................................ 83

17.2 Available comfort settings ......................................................... 83

18 Maintenance and service 83

18.1 Maintenance after a long stop period ........................................ 84

18.2 Maintenance before a long stop period ..................................... 84

18.3 About the refrigerant.................................................................. 84

18.4 After-sales service and warranty ............................................... 84

18.4.1 Warranty period ........................................................... 84

18.4.2 Recommended maintenance and inspection ............... 84

18.4.3 Recommended maintenance and inspection cycles .... 85

18.4.4 Shortened maintenance and replacement cycles ........ 85

19 Troubleshooting 85

19.1 Error codes: Overview ................................................................ 86

19.2 Symptoms that are NOT system malfunctions ........................... 87

19.2.1 Symptom: The system does not operate ..................... 87

19.2.2 Symptom: Cool/Heat cannot be changed over ............ 87

19.2.3 Symptom: Fan operation is possible, but cooling and

heating do not work...................................................... 87

19.2.4 Symptom: The fan strength does not correspond to

the setting .................................................................... 87

19.2.5 Symptom: The fan direction does not correspond to

the setting .................................................................... 87

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

unit) .............................................................................. 87

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

unit, outdoor unit) ......................................................... 87

19.2.8 Symptom: The user interface display reads "U4" or "U5" and stops, but then restarts after a few minutes.. 87

19.2.9 Symptom: Noise of air conditioners (Indoor unit) ......... 87

19.2.10 Symptom: Noise of air conditioners (Indoor unit,

outdoor unit)................................................................. 87

19.2.11 Symptom: Noise of air conditioners (Outdoor unit) ...... 87

19.2.12 Symptom: Dust comes out of the unit .......................... 87

19.2.13 Symptom: The units can give off odours...................... 87

19.2.14 Symptom: The outdoor unit fan does not spin ............. 87

19.2.15 Symptom: The display shows "88"............................... 88

19.2.16 Symptom: The compressor in the outdoor unit does

not stop after a short heating operation ....................... 88

19.2.17 Symptom: The inside of an outdoor unit is warm

even when the unit has stopped .................................. 88

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

stopped ........................................................................ 88

20 Relocation 88

21 Disposal 88

22 Glossary 88

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.

RYYQ+RYMQ+RXYQ8~20T7Y1B VRV IV system air conditioner 4P370475-1B – 2016.07

Installer and user reference guide

1 General safety precautions

DANGER: RISK OF EXPLOSION

Indicates a situation that could result in explosion.

WARNING

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

WARNING: FLAMMABLE MATERIAL

CAUTION

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

NOTICE

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

INFORMATION

Indicates useful tips or additional information.

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.

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:

▪ 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

1.3.1 General

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

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.

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.

Installer and user reference guide

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.

RYYQ+RYMQ+RXYQ8~20T7Y1B

VRV IV system air conditioner

4P370475-1B – 2016.07

1 General safety precautions

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.

1.3.2 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.

▪ 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.

DANGER: RISK OF EXPLOSION

Pump down – Refrigerant leakage. If you want to pump

down the system, and there is a leakage in the refrigerant circuit:

▪ Do NOT use the unit's automatic pump down function,

with which you can collect all refrigerant from the system into the outdoor unit. Possible consequence: Self-combustion and explosion of the compressor because of air going into the operating compressor.

▪ Use a separate recovery system so that the unit's

compressor does NOT have to operate.

WARNING

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.

▪ 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")

Charge with the cylinder upright.

WARNING

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

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.

RYYQ+RYMQ+RXYQ8~20T7Y1B VRV IV system air conditioner 4P370475-1B – 2016.07

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.

Installer and user reference guide

1 General safety precautions

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.

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.

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.

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.

▪ 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.

Installer and user reference guide

RYYQ+RYMQ+RXYQ8~20T7Y1B

VRV IV system air conditioner

4P370475-1B – 2016.07

2 About the documentation

b d

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.

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)

For the installer

▪ Outdoor unit installation and operation manual:

▪ Installation and operation instructions

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

▪ Installer and user reference guide:

▪ Preparation of the installation, reference data,…

▪ Detailed step-by-step instructions and background information

for basic and advanced usage

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

and-manuals/product-information/

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

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

Technical engineering data

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

Daikin website (publicly accessible).

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

extranet (authentication required).

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 outdoor unit

▪ Removing the accessories from the unit

▪ Removing the transportation stay

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:

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.

▪ Lift the unit preferably with a crane and 2 belts of at least 8m long

as shown in the figure below. Always use protectors to prevent belt damage and pay attention to the position of the unit's centre of gravity.

a Packaging material b Belt sling c Opening d Protector

NOTICE

Use a belt sling of ≤20mm wide that adequately bears the weight of the unit.

▪ A forklift can only be used for transport as long as the unit remains

on its pallet as shown above.

3.2 To unpack the outdoor unit

Relief the unit from its packing material:

▪ Take care not to damage the unit when removing the shrink foil

with a cutter.

▪ Remove the 4 bolts fixing the unit to its pallet.

WARNING

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

RYYQ+RYMQ+RXYQ8~20T7Y1B VRV IV system air conditioner 4P370475-1B – 2016.07

Installer and user reference guide

4 About the units and options

8~12 HP

14~20 HP

14~20 HP8~12 HP

a d

1× 1×

1×

3P328191-1

BE SURE TO FILL OUT THE BLANKS, WHICH ARE NEEDED FOR AFTER-SALE SERVICES.

REQUEST FOR THE INDICATION OF INSTALLATION INFORMATION

1. RECORD OF INDOOR UNIT MODEL AND INSTALLATION SITE

2. RECORD FOR SETTINGS (CONTENTS SEE INSTALLATION MANUAL)

SETTING

2019

3938

1817

3736

1615

3534

23 24

4321

INSTALLATION

MODELNAME

No.

12 13 14

504948474645

6059585756

64636261

2221

333231

44434241

5554535251

SITE

INSTALLATION

MODELNAME

No.

SITE

INSTALLATION

MODELNAME

No.

SITE

INSTALLATION

MODELNAME

No.

SITE

INSTALLATION

MODELNAME

No.

SITE

INSTALLATION

MODELNAME

No.

SITE

INSTALLATION

MODELNAME

No.

SITE

3. RECORD OF INSTALLATION DATE

6. AFTER EQUIPPING, PLEASE PUT IT ON THE BACK SIDE OF THE FRONT PLATE.

DAY MONTH YEAR

4. MODEL NAME 5. MANUFACTURING NUMBER

VALUE

REMARK DATE SETTING VALUE REMARK DATE

3P328192-1

3. FOR DETAILS CONCERNING PIPING SELECTION AND CALCULATION OR HOW TO OPERATE THE LEAK DETECTION FUNCTION, PLEASE REFER TO THE INSTALLATION MANUAL.

2. RECORD OF ADDITIONAL REFRIGERANT CHARGE AMOUNT AND RESULT OF LEAK CHECK OPERATION

REQUEST FOR THE INDICATION OF ADDITIONAL REFRIGERANT CHARGING AND LEAK DETECTION OPERATION RESULT

BE SURE TO FILL OUT THE BLANKS, WHICH ARE NEEDED FOR AFTER-SALE SERVICES.

1. CALCULATION OF ADDITIONAL REFRIGERANT CHARGING AMOUNT

4. AFTER FILLING IN THIS TABLE, PLEASE PUT IT ON THE SWITCH BOX COVER.

(m) x 0.18(m) x 0.37

OUTDOOR UNIT

(m) x 0.26

(m) x 0.12 (m) x 0.059

(m) x 0.022

ADDITIONAL CHARGING AMOUNT

TOTAL LENGTH OF LIQUID PIPE SIZE O22.2 x 0.37

TOTAL LENGTH OF LIQUID PIPE SIZE O19.1 x 0.26

TOTAL LENGTH OF LIQUID PIPE SIZE O15.9 x 0.18

TOTAL LENGTH OF LIQUID PIPE SIZE O12.7 x 0.12

TOTAL LENGTH OF LIQUID PIPE SIZE O9.5 x 0.059

TOTAL LENGTH OF LIQUID PIPE SIZE O6.4 x 0.022

105%< CR < 130%

50%< CR < 105%

50%< CR < 70% 70%< CR < 85% 85%< CR < 105% 105%< CR < 130%

8HP

Total indoor unit capacity connection ratio (CR)

10-12HP

14-16HP

18-20HP

2.0

1.5

1.2

1.5

0.7

1.0

0.5

0.3

0.5

1.0

0.5

Total indoor unit capacity when piping length <30m

Total indoor unit capacity when piping length >30m

1.3

1.1

0.9

RYYQ18-20

RYYQ14-16

RYYQ8~12

ONLY FOR RYYQ8~20 MODELS

DATE AMOUNT

CALCULATE THE ADDITIONAL REFRIGERANT CHARGING AMOUNT BASED ON THE FORMULA BELOW BEFORE CHARGING.

SHIPMENT (INDICATED ON THE MACHINE NAMEPLATE) AND THE ADDITIONAL AMOUNT SHOWN AS FOLLOWS :

WHEN RE-CHARGING TOTAL AMOUNT OF REFRIGERANT , CHARGE THE TOTAL OF THE AMOUNT CHARGED AT

RESULT LEAK CHECK

DATE AMOUNT RESULT LEAK CHECK

1×

f g

1×1×

ID Øa

ID Øb

ID Øa

OD Øb

ID Øb

ID Øa

ID Øb

ID Øa

ID Øb

ID Øa

OD Øb

3 (12.3 N·m)

a b

Accessory pipes (mm) HP Øa Øb

Liquid pipe

▪ Front connection

8 9.5

12 9.5 12.7

14 12.7

18 12.7 15.9

▪ Bottom connection

3.3 To remove the accessories from the outdoor unit

Make sure that all accessories are available in the unit.

Equaliser pipe

(a)

▪ Front connection

8 19.1

12 19.1 22.2

▪ Bottom connection

18 25.4 28.6

(a) Only for RYMQ models.

3.5 To remove the transportation stay

Only for 14~20 HP

NOTICE

If the unit is operated with the transportation stay attached, abnormal vibration or noise may be generated.

The transportation stay installed over the compressor leg for protecting the unit during transport must be removed. Proceed as shown in the figure and procedure below.

1 Slightly loosen the fixing nut (a).

2 Remove the transportation stay (b) as shown in the figure

below.

3 Tighten the fixing nut (a) again.

a General safety precautions b Installation manual and operation manual c Additional refrigerant charge label d Installation information sticker e Fluorinated greenhouse gases label

f Multilingual fluorinated greenhouse gases label

g Piping accessory bag

3.4 Accessory pipes: Diameters

Accessory pipes (mm) HP Øa Øb

Gas pipe

▪ Front connection

▪ Bottom connection

Installer and user reference guide

8 19.1

10 25.4 22.2

12 25.4 28.6

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.

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4 About the units and options

14~20 HP8~12 HP

g g

c c cd

▪ Which outdoor units have to be used as standalone units, and

which outdoor units can be combined.

4.2 Identification label: Outdoor unit

Location

Model identification

Example: R Y Y Q 18 T7 Y1 B [*]

Code Explanation

R Outdoor air cooled

Y Y=Heat pump (continuous heating)

X=Heat pump (no continuous heating)

Y Y=Pair module only

M=Multi module only

Q Refrigerant R410A

18 Capacity class

T7 Model series

Y1 Power supply

B European market

[*] Minor model change indication

(a) For RXYQ, there is no restriction on use as multi module.

(a)

The outdoor unit is designed to work in heating mode at ambient temperatures from –20°CWB to 15.5°CWB and in cooling mode at ambient temperatures from –5°CDB to 43°CDB.

4.4 System layout

INFORMATION

When using FXTQ indoor units, different requirements apply. See "5.3.8 Requirements in case of FXTQ indoor

units"on page18.

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.

a VRV IV Heat pump outdoor unit b Refrigerant piping c VRV direct expansion (DX) indoor unit d VRV LT Hydrobox (HXY080/125) 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 (dedicated depending on indoor unit type) h User interface (wireless, dedicated depending on indoor

unit type)

i Cool/Heat changeover remote control switch

4.5 Combining units and options

4.3 About the outdoor unit

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

Model line up:

Model Description

RYYQ8~20

RYYQ22~54

RXYQ8~20 Single non-continuous heating model.

RXYQ22~54 Multi non-continuous heating model

Depending on the type of outdoor unit which is chosen, some

(a)

Single continuous heating model.

Multi continuous heating model (consisting of 2 or 3 RYMQ modules).

(consisting of 2 or 3 RXYQ modules).

(a) The RYYQ models provide continuous comfort during

defrost operation.

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 heat pump.

The VRV IV 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.

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, single outdoor unit use, multiple outdoor unit use, combinations between indoor units, etc.) mentioned in the technical engineering data.

functionality will or will not exist. It will be indicated throughout this installation manual and brought to your attention. Certain features have exclusive model rights.

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

These units have (in single use) heating capacities ranging from 25 to 63kW and cooling capacities rating from 22.4 to 56 kW. In multi combination the heating capacity can go up till 168 kW and in cooling till 150kW.

4.5.2 Possible combinations of indoor units

INFORMATION

When using FXTQ indoor units, different requirements apply. See "5.3.8 Requirements in case of FXTQ indoor

units"on page18.

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

RYYQ+RYMQ+RXYQ8~20T7Y1B VRV IV system air conditioner 4P370475-1B – 2016.07

Installer and user reference guide

5 Preparation

▪ 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.

▪ Hydrobox (air to water applications): HXY080/125 series only.

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

depending on application.

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

depending on application.

4.5.3 Possible combinations of outdoor units

Possible standalone outdoor units

Non-continuous heating Continuous heating

RXYQ8 RYYQ8

RXYQ10 RYYQ10

RXYQ12 RYYQ12

RXYQ14 RYYQ14

RXYQ16 RYYQ16

RXYQ18 RYYQ18

RXYQ20 RYYQ20

Possible standard combinations of outdoor units

▪ RXYQ22~54 consists of 2 or 3 RXYQ8~20 units.

▪ RYYQ22~54 consists of 2 or 3 RYMQ8~20 units.

▪ RYYQ8~20 units cannot be combined.

▪ RYMQ8~20 units cannot be used as standalone outdoor unit.

Non-continuous heating Continuous heating

RXYQ22 = RXYQ10 + 12 RYYQ22 = RYMQ10 + 12

RXYQ24 = RXYQ8 + 16 RYYQ24 = RYMQ8 + 16

RXYQ26 = RXYQ12 + 14 RYYQ26 = RYMQ12 + 14

RXYQ28 = RXYQ12 + 16 RYYQ28 = RYMQ12 + 16

RXYQ30 = RXYQ12 + 18 RYYQ30 = RYMQ12 + 18

RXYQ32 = RXYQ16 + 16 RYYQ32 = RYMQ16 + 16

RXYQ34 = RXYQ16 + 18 RYYQ34 = RYMQ16 + 18

RXYQ36 = RXYQ16 + 20 RYYQ36 = RYMQ16 + 20

RXYQ38 = RXYQ8 + 10 + 20 RYYQ38 = RYMQ8 + 10 + 20

RXYQ40 = RXYQ10 + 12 + 18 RYYQ40 = RYMQ10 + 12 + 18

RXYQ42 = RXYQ10 + 16 + 16 RYYQ42 = RYMQ10 + 16 + 16

RXYQ44 = RXYQ12 + 16 + 16 RYYQ44 = RYMQ12 + 16 + 16

RXYQ46 = RXYQ14 + 16 + 16 RYYQ46 = RYMQ14 + 16 + 16

RXYQ48 = RXYQ16 + 16 + 16 RYYQ48 = RYMQ16 + 16 + 16

RXYQ50 = RXYQ16 + 16 + 18 RYYQ50 = RYMQ16 + 16 + 18

RXYQ52 = RXYQ16 + 18 + 18 RYYQ52 = RYMQ16 + 18 + 18

RXYQ54 = RXYQ18 + 18 + 18 RYYQ54 = RYMQ18 + 18 + 18

Description Model name

Refnet joint KHRQ22M20T

KHRQ22M29T9

KHRQ22M64T

KHRQ22M75T

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

"5.3.3To select refrigerant branch kits"on page15.

Outdoor multi connection piping kit

Number of outdoor units Model name

2 BHFQ22P1007

3 BHFQ22P1517

Cool/heat selector

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

Description Model name

Cool/heat change over switch KRC19-26A

Cool/heat change over PCB BRP2A81

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.

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/.

Heater tape kit

To keep the drain holes free in cold climates with high humidity, you can install a heater tape kit. If you do so, you also have to install the heater tape PCB kit.

Description Model name

Heater tape kit for 8~12 HP EKBPH012T

Heater tape kit for 14~20 HP EKBPH020T

Heater tape PCB kit EKBPHPCBT

See also: "5.2.2 Additional installation site requirements of the

outdoor unit in cold climates"on page12.

KJB111A

5 Preparation

4.5.4 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

KHRQ22M64H

KHRQ22M75H

Installer and user reference guide

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

RYYQ+RYMQ+RXYQ8~20T7Y1B

VRV IV system air conditioner

4P370475-1B – 2016.07

5 Preparation

b e

(mm)

5.2 Preparing installation site

5.2.1 Installation site requirements of the outdoor unit

▪ Provide sufficient space around the unit for servicing and air

circulation.

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

vibration.

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

ventilation openings.

▪ Make sure the unit is level.

▪ Select a place where rain can be avoided as much as possible.

▪ Select the location of the unit in such a way that the sound

generated by the unit does not disturb anyone, and the location is selected according the applicable legislation.

Do NOT install the unit in the following places:

▪ In potentially explosive atmospheres.

▪ In places where there is machinery that emits electromagnetic

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

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

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

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

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

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

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

CAUTION

Appliance not accessible to the general public, install it in a secured area, protected from easy access.

This unit, both indoor and outdoor, is suitable for installation in a commercial and light industrial environment.

▪ When installing, take strong winds, typhoons or earthquakes into

account, improper installation may result in the unit turning over.

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

any damage to the installation space and surroundings.

▪ When installing the unit in a small room, take measures in order to

keep the refrigerant concentration from exceeding allowable safety limits in the event of a refrigerant leak, refer to "About

safety against refrigerant leaks"on page12.

CAUTION

Excessive refrigerant concentrations in a closed room can lead to oxygen deficiency.

▪ Be sure that the air inlet of the unit is not positioned towards the

main wind direction. Frontal wind will disturb the operation of the unit. If necessary, use a screen to block the wind.

▪ Ensure that water cannot cause any damage to the location by

adding water drains to the foundation and prevent water traps in the construction.

Seaside installation. Make sure the outdoor unit is NOT directly exposed to sea winds. This is to prevent corrosion caused by high levels of salt in the air, which might shorten the life of the unit.

Install the outdoor unit away from direct sea winds.

Example: Behind the building.

NOTICE

This is a class A product. In a domestic environment this product may cause radio interference in which case the user may be required to take adequate measures.

NOTICE

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

It is therefore recommended to install the equipment and electric wires keeping proper distances away from stereo equipment, personal computers, etc.

a Personal computer or radio

b Fuse

c Earth leakage protector

d User interface

e Indoor unit

f Outdoor unit

In places with weak reception, keep distances of 3 m or more to avoid electromagnetic disturbance of other equipment and use conduit tubes for power and transmission lines.

RYYQ+RYMQ+RXYQ8~20T7Y1B VRV IV system air conditioner 4P370475-1B – 2016.07

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

▪ Height of windbreaker≥1.5×height of outdoor unit

▪ Mind the service space requirements when installing the

windbreaker.

a Sea wind b Building c Outdoor unit d Windbreaker

Installer and user reference guide

5 Preparation

(°C WB)

a b

15.5 15

–5

–10

–15

–20

10 15 20 25

(°C DB)

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

NOTICE

When operating the unit in a low outdoor ambient temperature, be sure to follow the instructions described below.

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.

INFORMATION

For instructions on how to install the snow cover, contact your dealer.

NOTICE

When installing the snow cover, do NOT obstruct the air flow of the unit.

NOTICE

When operating the unit 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 Warming up operation range

b Operation range

TAI Ambient indoor temperature

TAO Ambient outdoor temperature

If the unit has to operate for 5 days in this area with high humidity (>90%), Daikin recommends to install the optional heater tape kit (EKBPH012T or EKBPH020T) to keep the drain holes free. If you do so, you also have to install the heater tape PCB kit (EKBPHPCBT).

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 the system is 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.

Installer and user reference guide

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.

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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)

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:

5 Preparation

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

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.

▪ Temper grade: use piping with temper grade in function of the

pipe diameter as listed in table below.

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.)

RYYQ+RYMQ+RXYQ8~20T7Y1B VRV IV system air conditioner 4P370475-1B – 2016.07

Pipe Ø (mm) Temper grade of piping material

≤15.9 O (annealed)

≥19.1 1/2H (half hard)

▪ All piping lengths and distances have been taken into

consideration (see "5.3.4About the piping length"on page15).

5.3.2 To select the piping size

INFORMATION

When using FXTQ indoor units, different requirements apply. See "5.3.8 Requirements in case of FXTQ indoor

units"on page18.

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

Installer and user reference guide

5 Preparation

B B B

D F

1 2 4 5

b c

1,2 VRVDX indoor unit

3 BP box

4,5 RADX indoor unit

a,b Indoor branch kit

x,y Outdoor multi connection kit

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

Choose from the following table in accordance with the outdoor unit total capacity type, connected downstream.

Outdoor unit

capacity type (HP)

Piping outer diameter size (mm)

Gas pipe Liquid pipe

8 19.1 9.5

10 22.2 9.5

12~16 28.6 12.7

18~22 28.6 15.9

24 34.9 15.9

26~34 34.9 19.1

36~54 41.3 19.1

D: 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

Piping outer diameter size (mm)

Gas pipe Liquid pipe

<150 15.9 9.5

150≤x<200 19.1

200≤x<290 22.2

290≤x<420 28.6 12.7

420≤x<640 15.9

640≤x<920 34.9 19.1

≥920 41.3

Example:

▪ Downstream capacity for E=capacity index of unit 1

▪ Downstream capacity for D=capacity index of unit 1+capacity

index of unit 2

E: Piping between refrigerant branch kit and indoor unit

Pipe size for direct connection to indoor unit must be the same as the connection size of the indoor unit (in case indoor unit is VRVDX indoor or Hydrobox).

Indoor unit capacity

index

15~50 12.7 6.4

Installer and user reference guide

Piping outer diameter size (mm)

Gas pipe Liquid pipe

Indoor unit capacity

index

Piping outer diameter size (mm)

Gas pipe Liquid pipe

63~140 15.9 9.5

200 19.1

250 22.2

▪ When the equivalent pipe length between outdoor and indoor

units is 90m or more, the size of the main pipes (both gas side and liquid side) must be increased. Depending on the length of the piping, the capacity may drop, but even in such a case the size of the main pipes has to be increased. More specifications can be found in the technical engineering data book.

a Outdoor unit b Main pipes c Increase if the equivalent piping length is ≥90m d First refrigerant branch kit e Indoor unit

Size up

HP class Piping outer diameter size (mm)

Gas pipe Liquid pipe

8 19.1 → 22.2 9.5 → 12.7

10 22.2 → 25.4

12+14 28.6

16 28.6 → 31.8

(a)

(b)

(a)

12.7 → 15.9

18~22 15.9 → 19.1

24 34.9

26~34 34.9 → 38.1

36~54 41.3

(a) If the size-up size is NOT available, you must use the

standard size. Sizes bigger than the size-up size are NOT allowed. But even if you use the standard size, the equivalent piping length is allowed to be more than 90m.

(b) Pipe size-up is NOT allowed.

(b)

(a)

(b)

19.1 → 22.2

▪ The pipe thickness of the refrigerant piping shall comply with the

applicable legislation. The minimal pipe thickness for R410A piping must be in accordance with the table below.

Pipe Ø (mm) Minimal thickness t (mm)

6.4/9.5/12.7 0.80

15.9 0.99

19.1/22.2 0.80

28.6 0.99

34.9 1.21

41.3 1.43

▪ 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28.

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5 Preparation

Ø22.2 mm

Ø28.6 mm

Ø19.1 mm

F: Piping between refrigerant branch kit and BP unit

Pipe size for direct connection on BP unit must be based on the total capacity of the connected indoor units (only in case RADX indoor units are connected).

Total capacity index

of connected indoor

units

20~62 12.7 6.4

63~149 15.9 9.5

150~208 19.1

Example:

Downstream capacity for F=capacity index of unit 4+capacity index of unit 5

Piping outer diameter size (mm)

Gas pipe Liquid pipe

G: Piping between BP unit and RA DX indoor unit

Only in case RADX indoor units are connected.

Indoor unit capacity

index

20, 25, 30 9.5 6.4

50 12.7

60 9.5

71 15.9

Piping outer diameter size (mm)

Gas pipe Liquid pipe

5.3.3 To select refrigerant branch kits

INFORMATION

When using FXTQ indoor units, different requirements apply. See "5.3.8 Requirements in case of FXTQ indoor

units"on page18.

Refrigerant refnets

For piping example, refer to "5.3.2 To select the piping size" on

page13.

▪ 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).

Indoor unit capacity index 2 pipes

≥640 KHRQ22M75H

(a) If the pipe size above the refnet header is Ø34.9 or more,

KHRQ22M75H is required.

INFORMATION

Maximum 8 branches can be connected to a header.

▪ How to choose an outdoor multi connection piping kit. Choose

from the following table in accordance with the number of outdoor units.

Number of outdoor units Branch kit name

2 BHFQ22P1007

3 BHFQ22P1517

The RYYQ22~54 models, consisting of two or three RYMQ modules, require a 3-pipe system. There is an additional equalising pipe for such modules (in addition to the conventional gas and liquid piping). This equalising pipe does not exist for RYYQ8~20 or RXYQ8~54 units.

The equalising pipe connections for the different RYMQ modules are mentioned in below table.

RYMQ Equalising pipe Ø (mm)

8 19.1

10~16 22.2

18~20 28.6

Deciding the equalising pipe diameter:

▪ In case of 3 multi units: the connection diameter of outdoor to T-

joint has to be kept.

▪ In case of 2 multi units: the connection pipe has to have the

largest diameter.

There is never a connection of the equalising pipe with the indoor units.

Example: (free multi combination)

RYMQ8+RYMQ12+RYMQ18. Largest connection is Ø28.6 (RYMQ18); Ø22.2 (RYMQ12) and Ø19.1 (RYMQ8). In figure below only equalising pipe is shown.

Outdoor unit capacity type

▪ For refnet joints other than the first branch (example refnet joint b),

select the proper branch kit model based on the total capacity index of all indoor units connected after the refrigerant branch.

Indoor unit capacity index 2 pipes

▪ 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 2 pipes

RYYQ+RYMQ+RXYQ8~20T7Y1B VRV IV system air conditioner 4P370475-1B – 2016.07

(HP)

8~10 KHRQ22M29T9

12~22 KHRQ22M64T

24~54 KHRQ22M75T

<200 KHRQ22M20T

200≤x<290 KHRQ22M29T9

290≤x<640 KHRQ22M64T

≥640 KHRQ22M75T

<200 KHRQ22M29H

200≤x<290

290≤x<640 KHRQ22M64H

2 pipes

(a)

INFORMATION

Reducers or T-joints are field supplied.

NOTICE

Refrigerant branch kits can only be used with R410A.

5.3.4 About the piping length

INFORMATION

When using FXTQ indoor units, different requirements apply. See "5.3.8 Requirements in case of FXTQ indoor

units"on page18.

Make sure to perform the piping installation within the range of the maximum allowable pipe length, allowable level difference and allowable length after branching as indicated below. Three patterns will be discussed, including VRV DX indoor units combined with Hydrobox units or RADX indoor units.

Installer and user reference guide

5 Preparation

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

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

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

j k

1 2 3 4 5 6

7 8

c d e f g h

1 2 3 4 5 6 7

c d e f g h i

r s

Definitions

Term Definition

Actual piping length Pipe length between outdoor

(a)

and indoor

units.

Equivalent piping

(b)

length

Pipe length between outdoor units.

Total piping length Total piping length from the outdoor

(a)

and indoor

(a)

to all

indoor units.

H1 Difference in height between outdoor and

indoor units.

H2 Difference in height between indoor and

indoor units.

H3 Difference in height between outdoor and

outdoor units.

H4 Difference in height between outdoor and

BP unit.

H5 Difference in height between BP unit and

BP unit.

H6 Difference in height between BP unit and

RADX indoor unit.

(a) If the system capacity is >20HP, re-read "the first outdoor

branch as seen from the indoor unit".

(b) 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).

5.3.5 Piping length: VRV DX only

For system only containing VRVDX indoor units:

System setup

Example Description

Example 1.1

Example 1.2

Example 1.3

Example 2.1

Single outdoor

Branch with refnet joint

Single outdoor

Branch with refnet joint and refnet header

Single outdoor

Branch with refnet header

Multi outdoor

Branch with refnet joint

Example Description

Example 2.2

Multi outdoor

Branch with refnet joint and refnet header

Example 2.3

Multi outdoor

Branch with refnet header

Example 3

With standard multi layout

Indoor unit Refnet joint Refnet header Outdoor multi connection piping kit

Maximum allowable length

▪ Between outdoor and indoor units (single/multi combinations)

Actual piping length

165m/135m

Example 1.1

▪ unit8: a+b+c+d+e+f+g+p≤165m

Example 1.2

▪ unit6: a+b+h≤165m

▪ unit8: a+i+k≤165m

Example 1.3

▪ unit8: a+i≤165m

Example 2.1

▪ unit8: a+b+c+d+e+f+g+p≤135m

Equivalent length 190m/160m

Total piping length

1000m/500m

Example 1.1

▪ a+b+c+d+e+f+g+h+i+j+k+l+m+n+p≤1000m

Example 2.1

▪ a+b+c+d+e+f+g+h+i+j+k+l+m+n+p≤500m

▪ Between outdoor branch and outdoor unit (only in case >20HP)

Actual piping length

10m

Example 3

▪ r, s, t≤10m; u≤5m

Equivalent length 13m

Installer and user reference guide

RYYQ+RYMQ+RXYQ8~20T7Y1B

VRV IV system air conditioner

4P370475-1B – 2016.07

5 Preparation

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

2 3

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

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

Maximum allowable height difference

H1 ≤50m (40m) (if outdoor is located below indoor units)

Conditional extension up till 90m is possible without additional option kit:

▪ In case the outdoor location is higher than indoor:

extension is possible up till 90 m and following 2conditions must be fulfilled:

▪ Liquid piping size up (see table "Size up" in "E: Piping

between refrigerant branch kit and indoor unit" on page14).

▪ Dedicated setting on outdoor unit is required (see [2‑49]

in "7.2.8Mode 2: Field settings"on page41).

▪ In case the outdoor location is lower than indoor:

extension is possible up till 90 m and following 6conditions must be fulfilled:

▪ 40~60m: minimum connection ratio connected: 80%.

▪ 60~65m: minimum connection ratio connected: 90%.

▪ 65~80m: minimum connection ratio connected: 100%.

▪ 80~90m: minimum connection ratio connected: 110%.

▪ Liquid piping size up (see table "Size up" in "E: Piping

between refrigerant branch kit and indoor unit" on page14).

▪ Dedicated setting on outdoor unit is required (see [2‑35]

in "7.2.8Mode 2: Field settings"on page41).

H2 ≤30m

H3 ≤5m

Maximum allowable length after branch

The pipe length from the first refrigerant branch kit to the indoor unit ≤40 m.

Example 1.1: unit 8: b+c+d+e+f+g+p≤40m

Example 1.2: unit 6: b+h≤40m, unit 8: i+k≤40m

Example 1.3: unit 8: i≤40m

However, extension is possible if all below conditions are met. In this case limitation can be extended up to 90m.

b It is necessary to increase the pipe size of the gas and liquid

piping if the pipe length between the first and the final branch kit is over 40m.

If the increased pipe size is larger than the pipe size of the main pipe, then the pipe size of the main pipe has to be increased as well.

Increase the pipe size as follows:

9.5 → 12.7; 12.7 → 15.9; 15.9 → 19.1; 19.1 → 22.2; 22.2 →

25.4

(a)

; 28.6 → 31.8

(a)

; 34.9 → 38.1

(a)

(a) If the size-up size is NOT available, you must use the standard size. Sizes bigger than the size-up size are NOT allowed. But even if you use the standard size, you can increase the maximum allowable length after the first branch if all other conditions are met.

Example: unit8: b+c+d+e+f+g+p≤90m and b+c+d+e+f+g >40m; increase the pipe size of b, c, d, e, f, g.

c When the piping size is increased (stepb), the piping length

has to be counted as double (except for the main pipe and the pipes that are not increased in pipe size).

The total piping length has to be within limitations (see table above).

Example: a+b×2+c×2+d×2+e×2+f×2+g×2+h+i+j+k+l+m+n +p≤1000m (500m).

d The piping length difference between the nearest indoor from

first branch to the outdoor unit and farthest indoor to the outdoor unit is ≤40m.

Example: The farthest indoor unit 8. The nearest indoor unit 1 → (a+b+c+d+e+f+g+p)–(a+h)≤40m.

5.3.6 Piping length: VRV DX and Hydrobox

For system containing VRVDX indoor units and Hydrobox:

System setup

Example Description

Example 1

Branch with refnet joint

Conditions:

a The piping length between all indoor to the nearest branch kit is

≤40m.

Example: h, i, j … p≤40m

RYYQ+RYMQ+RXYQ8~20T7Y1B VRV IV system air conditioner 4P370475-1B – 2016.07

1 Outdoor units 2 Refnet joints (A~G) 3 Indoor unit (1~8)

Example 2

Branch with refnet joint and refnet header

Example 3

Branch with refnet header

1~7 VRVDX indoor units

8 Hydrobox unit (HXY080/125)

Maximum allowable length

Between outdoor and indoor units.

Installer and user reference guide

5 Preparation

BP1 6

b d

A B

BP2

321

2 3

1 2 3 4

1. 2.

12 HP FXTQ80 FXTQ80 FXTQ80 FXTQ80 14 HP FXTQ100 FXTQ80 FXTQ100 FXTQ80 16 HP FXTQ100 FXTQ100 FXTQ100 FXTQ100

10 HP FXTQ63 FXTQ63 FXTQ63 FXTQ63

8 HP FXTQ50 FXTQ50 FXTQ50 FXTQ50

Actual piping length

135m

Example 1:

▪ a+b+c+d+e+f+g+p≤135 m

▪ a+b+c+d+k≤135m

Example 2:

▪ a+i+k≤135m

▪ a+b+e≤135m

Example 3:

▪ a+i≤135m

▪ a+d≤135m

Equivalent length

(a)

160m

Total piping length 300m

Example 3:

▪ a+b+c+d+e+f+g+h+i≤300m

(a) Assume equivalent piping length of refnet joint=0.5m and

refnet header=1m (for calculation purposes).

Maximum allowable height difference (on Hydrobox indoor unit)

H1 ≤50m (40m) (if outdoor is located below indoor units)

H2 ≤15m

Maximum allowable length after branch

The pipe length from the first refrigerant branch kit to the indoor unit ≤40 m.

Example 1: unit 8: b+c+d+e+f+g+p≤40m

Example 2: unit 6: b+h≤40m, unit 8: i+k≤40m

Example 3: unit 8: i≤40m, unit 2: c≤40m

(a) Assume equivalent piping length of refnet joint=0.5m and

refnet header=1m (for calculation purposes).

▪ Between BP unit and indoor unit.

Indoor unit capacity index Pipe length

<60 2~15m

60 2~12m

71 2~8m

Remark: Minimum allowable length between outdoor unit and first refrigerant branch kit>5m (the refrigerant noise from the outdoor unit can be transmitted).

Example: a>5m

Maximum allowable height difference

H1 ≤50m (40m) (if outdoor is located below indoor units)

H2 ≤15m

H4 ≤40m

H5 ≤15m

H6 ≤5m

Maximum allowable length after branch

The pipe length from the first refrigerant branch kit to the indoor unit ≤50m.

Example: b+g+l≤50m

If the piping length between the first branch and BP unit or VRVDX indoor unit is over 20 m, it is necessary to increase the gas and liquid piping size between the first branch and BP unit or VRVDX indoor unit. If the piping diameter of the sized up piping exceeds the diameter of the piping before the first branch kit, than the latter also requires a liquid piping and gas piping size up.

5.3.7 Piping length: VRV DX and RA DX

For system containing VRVDX indoor units and RADX indoor units:

System setup

Header

BP box

1~5 RADX indoor units

6,7 VRVDX indoor units

Maximum allowable length

▪ Between outdoor unit and indoor unit.

Actual piping length

Equivalent length

Total piping length 250m

Installer and user reference guide

100m

Example:

a+b+g+l≤100m

(a)

120m

Example:

a+b+d+g+l+k+c+e+f+h+i+j≤250m

5.3.8 Requirements in case of FXTQ indoor units

When using FXTQ indoor units, the following requirements apply.

Possible combinations

FXTQ indoor units cannot be combined with any other indoor type compatible with the outdoor unit. Only the following outdoor-indoor unit combinations are allowed:

Outdoor unit FXTQ50 FXTQ63 FXTQ80 FXTQ100

RYYQ8/RXYQ8 4× O — — —

RYYQ10/RXYQ10 — 4× O — —

RYYQ12/RXYQ12 — — 4× O —

RYYQ14/RXYQ14 — — 2× O 2× O

RYYQ16/RXYQ16 — — — 4× O

System layout (2 possibilities)

RYYQ+RYMQ+RXYQ8~20T7Y1B

VRV IV system air conditioner

4P370475-1B – 2016.07

5 Preparation

a b

b b b

≥200 mm

A Piping between outdoor unit and first refrigerant branch kit B Piping between refrigerant branch kits C Piping between refrigerant branch kit and indoor units

a1, a2 Refnet joints

b Refnet header

Refrigerant piping length and height difference

The piping lengths and height differences must comply with the following requirements.

Maximum piping lengths

1 Longest pipe (actual) ≤120m

2 After first branch ≤40m

3 Total piping length ≤300m

Maximum height differences

1 Indoor-Outdoor (outdoor lowest) ≤40m

2 Outdoor-Indoor (outdoor highest) ≤50m

3 Indoor-Indoor ≤15m

A: Piping between outdoor unit and first refrigerant branch kit

Use the following diameters:

Outdoor unit

capacity type (HP)

Piping outer diameter size (mm)

Gas pipe Liquid pipe

8 19.1 9.5

10 22.2 9.5

12~16 28.6 12.7

R Additional refrigerant charge according to liquid piping

diameter/length and outdoor unit specific amount. See

"6.7.3To determine the additional refrigerant amount"on page28.

P Additional refrigerant charge due to use of FXTQ indoor

units. P=ΣT

T Additional charge for each indoor unit used (depending on

type)

1..4

Indoor unit T (kg)

FXTQ50 0.6

FXTQ63 0.5

FXTQ80 0.9

FXTQ100 1.1

5.3.9 Multiple outdoor units: Possible layouts

▪ The piping between the outdoor units must be routed level or

slightly upward to avoid the risk of oil retention into the piping.

Pattern 1 Pattern 2

B: Piping between refrigerant branch kits

Use the following diameters:

Outdoor unit

capacity type (HP)

Piping outer diameter size (mm)

Gas pipe Liquid pipe

8+10 22.2 9.5

12 28.6 12.7

14+16 28.6 15.9

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 Piping outer diameter size (mm)

Gas pipe Liquid pipe

FXTQ50 15.9 9.5

FXTQ63 15.9 9.5

FXTQ80 19.1 9.5

FXTQ100 22.2 9.5

a1, a2: Refnet joints

Outdoor unit capacity type

Refnet joint

(HP)

8+10 KHRQ22M29T9

12~16 KHRQ22M64T

a To indoor unit

b Piping between outdoor units X Not allowed O Allowed

▪ To avoid the risk of oil retention to the outmost outdoor unit,

always connect the stop valve and the piping between outdoor units as shown in the 4 correct possibilities of the figure below.

b: Refnet header

Outdoor unit capacity type

Additional refrigerant charge

When using FXTQ indoor units, additional refrigerant needs to be charged to the system.

Total system refrigerant charge = Z = O+R+P

RYYQ+RYMQ+RXYQ8~20T7Y1B VRV IV system air conditioner 4P370475-1B – 2016.07

(HP)

8+10 KHRQ22M64H

12~16 KHRQ22M75H

O Standard factory charge of outdoor unit

Refnet header

a To indoor unit

b Oil collects to the outmost outdoor unit when the system

stops

X Not allowed O Allowed

Installer and user reference guide

5 Preparation

≤2 m

≤2 m ≤2 m

≥200 mm

>2 m >2 m

A B C

a b c

▪ If the piping length between the outdoor units exceeds 2m, create

a rise of 200mm or more in the gas line within a length of 2 m from the kit.

If Then

≤2m

>2m

a To indoor unit b Piping between outdoor units

NOTICE

There are restrictions on the refrigerant pipe connection order between outdoor units during installation in case of a multiple outdoor unit system. Install according to following restrictions. The capacities of outdoor units A, B and C must fulfill the following restriction conditions: A≥B≥C.

Model Z

(Ω) Minimum S

max

value (kVA)

RYYQ8/RYMQ8/RXYQ8 — 1216

RYYQ10/RYMQ10/RXYQ10 — 564

RYYQ12/RYMQ12/RXYQ12 — 615

RYYQ14/RYMQ14/RXYQ14 — 917

RYYQ16/RYMQ16/RXYQ16 — 924

RYYQ18/RYMQ18/RXYQ18 — 873

RYYQ20/RYMQ20/RXYQ20 — 970

RYYQ22/RXYQ22 — 1179

RYYQ24/RXYQ24 — 2140

RYYQ26/RXYQ26 — 1532

RYYQ28/RXYQ28 — 1539

RYYQ30/RXYQ30 — 1488

RYYQ32/RXYQ32 — 1848

RYYQ34/RXYQ34 — 1797

RYYQ36/RXYQ36 — 1894

RYYQ38/RXYQ38 — 2750

RYYQ40/RXYQ40 — 2052

RYYQ42/RXYQ42 — 2412

RYYQ44/RXYQ44 — 2463

RYYQ46/RXYQ46 — 2765

RYYQ48/RXYQ48 — 2772

RYYQ50/RXYQ50 — 2721

RYYQ52/RXYQ52 — 2670

RYYQ54/RXYQ54 — 2619

a To indoor units

b Outdoor unit multi connecting piping kit (first branch)

c Outdoor unit multi connecting piping kit (second branch)

5.4 Preparing electrical wiring

5.4.1 About electrical compliance

This equipment complies with:

▪ EN/IEC 61000‑3‑11 provided that the system impedance Z

less than or equal to Z

at the interface point between the user's

max

supply and the public system.

▪ EN/IEC 61000‑3‑11 = European/International Technical

Standard setting the limits for voltage changes, voltage fluctuations and flicker in public low-voltage supply systems for equipment with rated current ≤75A.

▪ It is the responsibility of the installer or user of the equipment to

ensure, by consultation with the distribution network operator if necessary, that the equipment is connected only to a supply with a system impedance Z

less than or equal to Z

sys

max

▪ EN/IEC 61000‑3‑12 provided that the short-circuit power Ssc is

greater than or equal to the minimum Ssc value at the interface point between the user's supply and the public system.

▪ 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.

▪ It is the responsibility of the installer or user of the equipment to

ensure, by consultation with the distribution network operator if necessary, that the equipment is connected only to a supply with a short-circuit power Ssc greater than or equal to the minimum Ssc value.

sys

INFORMATION

Multi units are standard combinations.

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.

For standard combinations

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

INFORMATION

Multi units are standard combinations.

Model Minimum

circuit

ampacity

RYYQ8/RYMQ8/RXYQ8 16.1A 20A

RYYQ10/RYMQ10/RXYQ10 22.0A 25A

RYYQ12/RYMQ12/RXYQ12 24.0A 32A

RYYQ14/RYMQ14/RXYQ14 27.0A 32A

RYYQ16/RYMQ16/RXYQ16 31.0A 40A

RYYQ18/RYMQ18/RXYQ18 35.0A 40A

RYYQ20/RYMQ20/RXYQ20 39.0A 50A

RYYQ22/RXYQ22 46.0A 63A

RYYQ24/RXYQ24 46.0A 63A

RYYQ26/RXYQ26 51.0A 63A

RYYQ28/RXYQ28 55.0A 63A

RYYQ30/RXYQ30 59.0A 80A

RYYQ32/RXYQ32 62.0A 80A

Recommended

fuses

Installer and user reference guide

RYYQ+RYMQ+RXYQ8~20T7Y1B

VRV IV system air conditioner

4P370475-1B – 2016.07

6 Installation

14×14×

8~12 HP 14~20 HP

2×

8~12 HP

SW8

6×

14~20 HP

SW8

Model Minimum

circuit

ampacity

RYYQ34/RXYQ34 66.0A 80A

RYYQ36/RXYQ36 70.0A 80A

RYYQ38/RXYQ38 76.0A 100A

RYYQ40/RXYQ40 81.0A 100A

RYYQ42/RXYQ42 84.0A 100A

RYYQ44/RXYQ44 86.0A 100A

RYYQ46/RXYQ46 89.0A 100A

RYYQ48/RXYQ48 93.0A 125A

RYYQ50/RXYQ50 97.0A 125A

RYYQ52/RXYQ52 101.0A 125A

RYYQ54/RXYQ54 105.0A 125A

For all models:

▪ Phase and frequency: 3N~50Hz

▪ Voltage: 380-415V

▪ Transmission line section: 0.75~1.25 mm2, maximum length is

1000 m. If the total transmission wiring exceeds these limits, it may result in communication error.

For non-standard combinations

Calculate the recommended fuse capacity

Formula Calculate, by adding the minimum circuit amps of each

used unit (according to the table above), multiply the result by 1.1 and select the next higher recommended fuse capacity.

Example Combining the RXYQ30 by using the RXYQ8,

RXYQ10, and RXYQ12.

▪ Minimum circuit ampacity of the RXYQ8=16.1A

▪ Minimum circuit ampacity of the RXYQ10=22.0A

▪ Minimum circuit ampacity of the RXYQ12=24.0A

Accordingly, the minimum circuit ampacity of the RXYQ30=16.1+22.0+24.0=62.1A

Multiplying the above result by 1.1 (62.1×1.1)=68.31A, so the recommended fuse capacity would be 80A.

Recommended

fuses

6.2 Opening the units

6.2.1 To open the outdoor unit

DANGER: RISK OF ELECTROCUTION

DANGER: RISK OF BURNING

To gain access to the unit, front plates need to be opened as follows:

Once the front plates open, the electrical component box can be accessed. See "6.2.2 To open the electrical component box of the

outdoor unit"on page21.

For service purposes, the push buttons on the main PCB need to be accessed. To access these push buttons, the electrical component box cover does not need to be opened. See "7.2.3To access the

field setting components"on page39.

6.2.2 To open the electrical component box of the outdoor unit

NOTICE

Do not apply excessive force when opening the electronic component box cover. Excessive force can deform the cover, resulting in entering of water to cause equipment failure.

NOTICE

When using residual current operated circuit breakers, be sure to use a high-speed type 300 mA rated residual operating current.

6 Installation

6.1 Overview: Installation

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

It contains information about:

▪ Opening the units

▪ Mounting the outdoor unit

▪ Connecting the refrigerant piping

▪ Checking the refrigerant piping

▪ Charging refrigerant

▪ Connecting the electrical wiring

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Installer and user reference guide

6 Installation

a b

c d

≥100 mm

729

≤613

≥929

≥AB

(mm)

20 mm

NOTICE

When closing the electrical component box cover, make sure that the sealing material on the lower back side of the cover is not caught and bend towards the inside.

a Electrical component box cover

b Front side

c Power supply terminal block

d Sealing material

e Moisture and dirt could enter

X Not allowed

O Allowed

NOTICE

▪ Prepare a water drainage channel around the

foundation to drain waste water from around the unit. During heating operation and when the outdoor temperatures are negative, the drained water from the outdoor unit will freeze up. If the water drainage is not taken care of, the area around the unit might be very slippery.

▪ When installed in a corrosive environment, use a nut

with plastic washer (a) to protect the nut tightening part from rust.

6.3 Mounting the outdoor unit

6.3.1 To provide the installation structure

Make sure the unit is installed level on a sufficiently strong base to prevent vibration and noise.

NOTICE

When the installation height of the unit needs to be increased, do not use stands to only support the corners.

X Not allowed

O Allowed (* = preferred installation)

▪ The height of the foundation must at least be 150mm from the

floor. In heavy snowfall areas, this height should be increased, depending on the installation place and condition.

▪ The preferred installation is on a solid longitudinal foundation

(steel beam frame or concrete). The foundation must be larger than the grey marked area.

6.4 Connecting the refrigerant piping

6.4.1 Precautions when connecting refrigerant piping

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).

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.

Minimum foundation

a Anchor point (4×)

HP AA AB

8~12 766 992

14~20 1076 1302

▪ Fasten the unit in place using four foundation bolts M12. It is best

Installer and user reference guide

to screw in the foundation bolts until their length remains 20mm above the foundation surface.

WARNING

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

Only use phosphoric acid deoxidised seamless copper.

NOTICE

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

6.4.2 About connecting the refrigerant piping

Before connecting the refrigerant piping, make sure the outdoor and indoor units are mounted.

Connecting the refrigerant piping involves:

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6 Installation

a b

2 2

≤Ø25.4 >Ø25.4

A B

7.5°

>120 mm

>500 mm

▪ Routing and connecting the refrigerant piping to the outdoor unit

▪ Protecting the outdoor unit against contamination

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

installation manual of the indoor units)

▪ Connecting the multi-connection piping kit

▪ Connecting the refrigerant branching kit

▪ Keeping in mind the guidelines for:

▪ Brazing

▪ Using the stop valves

▪ Removing the pinched pipes

6.4.3 To route the refrigerant piping

Installation of refrigerant piping is possible as front connection or side connection (when taken out from the bottom) as shown in the figure below.

a Left-side connection

b Front connection

c Right-side connection

For side connections, the knockout hole on the bottom plate should be removed:

a Large knockout hole

b Drill

c Points for drilling

NOTICE

Precautions when making knockout holes:

▪ Avoid damaging the casing.

▪ After making the knockout holes, we recommend you

remove the burrs and paint the edges and areas around the edges using repair paint to prevent rusting.

▪ When passing electrical wiring through the knockout

holes, wrap the wiring with protective tape to prevent damage.

6.4.4 To connect the refrigerant piping to the outdoor unit

INFORMATION

All local inter unit piping are field supplied except the accessory pipes.

NOTICE

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

NOTICE

▪ Be sure to use the supplied accessory pipes when

carrying out piping work in the field.

▪ 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.

Connection from the stop valves to the field piping can be done by using accessory pipes supplied as accessory.

The connections to the branch kits are the responsibility of the installer (field piping).

6.4.5 To connect the multi connection piping kit

NOTICE

Improper installation may lead to malfunction of the outdoor unit.

▪ Install the joints horizontally, so that the caution label (a) attached

to the joint comes to the top.

▪ Do not tilt the joint more than 7.5° (see view A).

▪ Do not install the joint vertically (see view B).

a Caution label X Not allowed O Allowed

▪ Make sure that the total length of the piping connected to the joint

is absolute straight for more than 500mm. Only if a straight field piping of more than 120 mm is connected, more than 500 mm of straight section can be ensured.

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Installer and user reference guide

6 Installation

a b c d e

6.4.6 Multiple outdoor units: Knockout holes

Connection Description

Front connection Remove the front plate knockout holes to

connect.

Bottom connection Remove the knockout holes on the bottom

frame and route the piping under the bottom.

6.4.7 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.

a Close the areas marked with " ". (When the piping is

routed from the front panel.)

▪ Only use clean pipes.

▪ Hold the pipe end downwards when removing burrs.

▪ Cover the pipe end when inserting it through a wall, to prevent

dust and/or particles entering the pipe.

6.4.9 To braze the pipe end

▪ 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.

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.

a Horizontal surface

b Refnet joint mounted vertically

c Refnet joint mounted horizontally

6.4.8 To protect against contamination

Protect the piping as described in the following table to prevent dirt, liquid or dust from entering the 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

Block all gaps in the holes for passing out piping and wiring using sealing material (field supply) (otherwise the capacity of the unit will drop and small animals may enter the machine).

Example: passing piping out through the front.

Installer and user reference guide

period

6.4.10 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.

a Service port and service port cover b Stop valve c Field piping connection d Stop valve cover

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a b

cde

a Service port

p<p

R410AN2

b c e

f g

A B

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.

To fully open the Ø19.1 mm~Ø25.4 mm stop valve, turn the hexagonal wrench until a torque between 27 and 33 N•m is achieved.

Inadequate torque may cause leakage of refrigerant and breakage of the stop valve cap.

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

Stop valve

size (mm)

Ø9.5 5.4~6.6 4mm 13.5~16.5 11.5~13.9

Ø12.7 8.1~9.9 18.0~22.0

Ø15.9 13.5~16.5 6mm 23.0~27.0

Ø19.1 27.0~33.0 8mm 22.5~27.5

Ø25.4

Tightening torque N•m (turn clockwise to close)

Shaft

Valve body Hexagonal

wrench

Cap (valve

lid)

Service

port

NOTICE

Pay attention that mentioned torque range is applicable for opening Ø19.1~Ø25.4mm stop valves only.

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:

6.4.11 To remove the pinched pipes

WARNING

Any gas or oil remaining inside the stop valve may blow off the pinched piping.

Failure to observe the instructions in procedure below properly may result in property damage or personal injury, which may be serious depending on the circumstances.

Use the following procedure to remove the pinched piping:

1 Remove the valve cover and make sure that the stop valves are

fully closed.

a Service port and service port cover

b Stop valve

c Field piping connection

d Stop valve cover

2 Connect the vacuuming/recovery unit through a manifold to the

service port of all stop valves.

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.

RYYQ+RYMQ+RXYQ8~20T7Y1B VRV IV system air conditioner 4P370475-1B – 2016.07

a Pressure reducing valve

b Nitrogen

c Weighing scales

d Refrigerant R410A tank (siphon system)

e Vacuum pump

f Liquid line stop valve

g Gas line stop valve A Valve A

Installer and user reference guide

6 Installation

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

B Valve B

3 Recover gas and oil from the pinched piping by using a

recovery unit.

CAUTION

Do not vent gases into the atmosphere.

4 When all gas and oil is recovered from the pinched piping,

disconnect the charge hose and close the service ports.

5 Cut off the lower part of the gas, liquid and equalising stop

valve pipes along the black line. Use an appropriate tool (e.g. a pipe cutter, a pair of nippers).

WARNING

Never remove the pinched piping by brazing.

Any gas or oil remaining inside the stop valve may blow off the pinched piping.

6 Wait until all oil is dripped out before continuing with the

connection of the field piping in case the recovery was not complete.

6.5 Checking the refrigerant piping

6.5.1 About checking the refrigerant piping

Method 1: Before power ON

If the system has not yet been powered on, no special action is required to perform the leak test and the vacuum drying.

Method 2: After power ON

If the system has already been powered on, activate setting [2‑21] (refer to "7.2.4 To access mode 1 or 2" on page39). This setting will open field expansion valves to guarantee a R410A piping pathway and make it possible to perform the leak test and the vacuum drying.

NOTICE

Make sure that all indoor units connected to the outdoor unit are powered on.

NOTICE

Wait until the outdoor unit has finished the initialisation to apply setting [2‑21].

Leak test and vacuum drying

Checking the refrigerant piping involves:

▪ Checking for any leakages in the refrigerant piping.

▪ Performing vacuum drying to remove all moisture, air or nitrogen

in 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.

All piping inside the unit has been factory tested for leaks.

Only field installed refrigerant piping needs to be checked. Therefore, make sure that all the outdoor unit stop valves are firmly closed before performing leak test or vacuum drying.

NOTICE

Make sure that all (field supplied) field piping valves are OPEN (not outdoor unit stop valves!) before you start leak test and vacuuming.

For more information on the state of the valves, refer to

"6.5.3Checking refrigerant piping: Setup"on page27.

6.5.2 Checking refrigerant piping: General guidelines

Connect the vacuum pump through a manifold to the service port of all stop valves to increase efficiency (refer to "6.5.3 Checking

refrigerant piping: Setup"on page27).

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.

Therefore, there will be explained 2 methods for initial installation, leak test and vacuum drying.

Installer and user reference guide

NOTICE

Use a 2-stage vacuum pump with a non-return valve or a solenoid valve that can evacuate to a gauge pressure of –⁠100.7kPa (5Torr absolute).

NOTICE

Make sure the pump oil does not flow oppositely into the system while the pump is not working.

NOTICE

Do not purge the air with refrigerants. Use a vacuum pump to evacuate the installation.

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6 Installation

p<p

R410AN2

b c e

A B

6.5.3 Checking refrigerant piping: Setup

a Pressure reducing valve

b Nitrogen

c Weighing scales

d Refrigerant R410A tank (siphon system)

e Vacuum pump

f Liquid line stop valve g Gas line stop valve h Equalising line stop valve (only for RYMQ) A Valve A B Valve B C Valve C D Valve D

Valve State of valve

Valve A Open

Valve B Open

Valve C Open

Valve D Open

Liquid line stop valve Close

Gas line stop valve Close

Equalising line stop valve Close

NOTICE

The connections to the indoor units and all indoor units should also be leak and vacuum tested. Keep any possible (field supplied) field piping valves open as well.

Refer to the indoor unit installation manual for more details. Leak test and vacuum drying should be done before the power supply is set to the unit. If not, see also the flow chart earlier described in this chapter (see "6.5.1 About

checking the refrigerant piping"on page26).

6.5.4 To perform a leak test

The leak test must satisfy the specifications of EN378‑2.

To check for leaks: Vacuum leak test

1 Evacuate the system from the liquid and gas piping to

–⁠100.7kPa (–⁠1.007bar/5Torr) for more than 2 hours.

2 Once reached, turn off the vacuum pump and check that the

pressure does not rise for at least 1 minute.

3 Should the pressure rise, the system may either contain

moisture (see vacuum drying below) or have leaks.

To check for leaks: Pressure leak test

1 Break the vacuum by pressurising with nitrogen gas to a

minimum gauge pressure of 0.2 MPa (2 bar). Never set the gauge pressure higher than the maximum operation pressure of the unit, i.e. 4.0MPa (40bar).

2 Test for leaks by applying a bubble test solution to all piping

connections.

3 Discharge all nitrogen gas.

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).

6.5.5 To perform vacuum drying

NOTICE

The connections to the indoor units and all indoor units should also be leak and vacuum tested. Keep, if existing, all (field supplied) field valves to the indoor units open as well.

Leak test and vacuum drying should be done before the power supply is set to the unit. If not, see "6.5.1 About

checking the refrigerant piping" on page 26 for more

information.

To remove all moisture from the system, proceed as follows:

1 Evacuate the system for at least 2 hours to a target vacuum of

–⁠100.7kPa (–⁠1.007bar/5Torr).

2 Check that, with the vacuum pump turned off, the target

vacuum is maintained for at least 1 hour.

3 Should you fail to reach the target vacuum within 2 hours or

maintain the vacuum for 1 hour, the system may contain too much moisture. In that case, break the vacuum by pressurising with nitrogen gas to a gauge pressure of 0.05 MPa (0.5 bar) and repeat steps 1 to 3 until all moisture has been removed.

4 Depending on whether you want to immediately charge

refrigerant through the refrigerant charge port or first pre-charge a portion of refrigerant through the liquid line, either open the outdoor unit stop valves, or keep them closed. See "6.7.2About

charging refrigerant"on page28 for more information.

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.

6.6 To insulate the refrigerant piping

After finishing the leak test and vacuum drying, the piping must be insulated. Take into account the following points:

▪ Make sure to insulate the connection piping and refrigerant branch

kits entirely.

▪ Be sure to insulate the liquid and gas piping (for all units).

▪ Use heat resistant polyethylene foam which can withstand a

temperature of 70°C for liquid piping and polyethylene foam which can withstand a temperature of 120°C for gas piping.

▪ Reinforce the insulation on the refrigerant piping according to the

installation environment.

Ambient

temperature

≤30°C 75% to 80% RH 15mm

>30°C ≥80% RH 20mm

Humidity Minimum thickness

RYYQ+RYMQ+RXYQ8~20T7Y1B VRV IV system air conditioner 4P370475-1B – 2016.07

Condensation might form on the surface of the insulation.

Installer and user reference guide

6 Installation

▪ If there is a possibility that condensation on the stop valve might

drip down into the indoor unit through gaps in the insulation and piping because the outdoor unit is located higher than the indoor unit, this must be prevented by sealing up the connections. See below figure.

a Insulation material

b Caulking etc.

6.7 Charging refrigerant

6.7.1 Precautions when charging refrigerant

WARNING

▪ Only use R410A as refrigerant. Other substances may

cause explosions and accidents.

▪ R410A contains fluorinated greenhouse gases. Its

global warming potential (GWP) value is 2087.5. Do NOT vent these gases into the atmosphere.

▪ When charging refrigerant, always use protective

gloves and safety glasses.

NOTICE

If the power of some units is turned off, the charging procedure cannot be finished properly.

NOTICE

In case of a multiple outdoor system, turn on the power of all outdoor units.

NOTICE

Be sure to turn on the power 6 hours before operation in order to have power running to the crankcase heater and to protect the compressor.

NOTICE

If operation is performed within 12 minutes after the indoor and outdoor units are turned on, the compressor will not operate before the communication is established in a correct way between outdoor unit(s) and indoor units.

NOTICE

Before starting charging procedures, check if the 7‑segment display indication of the outdoor unit A1P PCB is as normal (see "7.2.4 To access mode 1 or 2" on

page 39). If a malfunction code is present, see "10.2 Solving problems based on error codes" on page51.

NOTICE

Make sure all connected indoor units are recognised (see [1‑10], [1‑38] and [1‑39] in "7.2.7 Mode 1: Monitoring

settings"on page40).

NOTICE

Close the front panel before any refrigerant charge operation is executed. Without the front panel attached the unit cannot judge correctly whether it is operating properly or not.

NOTICE

In case of maintenance and the system (outdoor unit+field piping+indoor units) does not contain any refrigerant any more (e.g., after refrigerant reclaim operation), the unit has to be charged with its original amount of refrigerant (refer to the nameplate on the unit) by pre-charging before the automatic charging function can be started.

6.7.2 About charging refrigerant

Once vacuum drying is finished, additional refrigerant charging can start.

There are two methods to charge additional refrigerant.

Method See

Automatic charge "6.7.6Step 6a: To automatically charge

Manual charge "6.7.7Step 6b: To manually charge

INFORMATION

Adding refrigerant using the automatic refrigerant charging function is not possible when Hydrobox units or RA DX indoor units are connected to the system.

To speed up the refrigerant charging process, it is in case of larger systems recommended to first pre-charge a portion of refrigerant through the liquid line before proceeding with the actual automatic or manual charging. This step is included in below procedure (see

"6.7.5 To charge refrigerant" on page 31). It can be skipped, but

charging will take longer then.

A flow chart is available which gives an overview of the possibilities and actions to be taken (see "6.7.4 To charge refrigerant: Flow

chart"on page29).

refrigerant"on page32

refrigerant"on page33

6.7.3 To determine the additional refrigerant amount

INFORMATION

When using FXTQ indoor units, different requirements apply. See "5.3.8 Requirements in case of FXTQ indoor

units"on page18.

NOTICE

The refrigerant charge of the system must be less than 100 kg. This means that in case the calculated total refrigerant charge is equal to or more than 95kg you must divide your multiple outdoor system into smaller independent systems, each containing less than 95 kg refrigerant charge. For factory charge, refer to the unit name plate.

Additional refrigerant to be charged=R (kg). R should be rounded off in units of 0.1 kg.

R=[(X1×Ø22.2)×0.37+(X2×Ø19.1)×0.26+(X3×Ø15.9)×0.18+(X4×Ø12.7 )×0.12+(X5×Ø9.5)×0.059+(X6×Ø6.4)×0.022]+A+B

=Total length (m) of liquid piping size at Øa

1...6

Piping length Total indoor unit

capacity CR

≤30m 50%≤CR≤105% 0 0.5

105%<CR≤130% 0.5 1

(a)

A parameter (kg)

8 HP 10~16 HP 18~20 HP

Installer and user reference guide

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4P370475-1B – 2016.07

+ 64 hidden pages

Daikin RYYQ8T7Y1B*, RYYQ10T7Y1B*, RYYQ12T7Y1B*, RYYQ14T7Y1B*, RYYQ16T7Y1B* Installer reference guide

Table of Contents

1 General safety precautions

1.1 About the documentation

1.1.1 Meaning of warnings and symbols

1.2 For the user

1.3 For the installer

1.3.1 General

1.3.2 Installation site

1.3.3 Refrigerant

1.3.4 Brine

1.3.5 Water

1.3.6 Electrical

2 About the documentation

2.1 About this document

For the installer

3 About the box

3.1 Overview: About the box

3.2 To unpack the outdoor unit

4 About the units and options

3.3 To remove the accessories from the outdoor unit

3.5 To remove the transportation stay

3.4 Accessory pipes: Diameters

4.1 Overview: About the units and options

4.2 Identification label: Outdoor unit

4.4 System layout

4.5 Combining units and options

4.3 About the outdoor unit

4.5.1 About combining units and options

4.5.2 Possible combinations of indoor units

5 Preparation

4.5.3 Possible combinations of outdoor units

4.5.4 Possible options for the outdoor unit

5.1 Overview: Preparation

5.2 Preparing installation site

5.2.1 Installation site requirements of the outdoor unit

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

5.2.3 Securing safety against refrigerant leaks

About safety against refrigerant leaks

About the maximum concentration level

To check the maximum concentration level

5.3 Preparing refrigerant piping

5.3.1 Refrigerant piping requirements

5.3.2 To select the piping size

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

D: Piping between refrigerant branch kits

E: Piping between refrigerant branch kit and indoor unit

F: Piping between refrigerant branch kit and BP unit

G: Piping between BP unit and RA DX indoor unit

5.3.3 To select refrigerant branch kits

5.3.4 About the piping length

5.3.5 Piping length: VRV DX only

5.3.6 Piping length: VRV DX and Hydrobox

5.3.7 Piping length: VRV DX and RA DX

5.3.8 Requirements in case of FXTQ indoor units

5.3.9 Multiple outdoor units: Possible layouts

5.4 Preparing electrical wiring

5.4.1 About electrical compliance

5.4.2 Safety device requirements

6 Installation

6.2 Opening the units

6.2.1 To open the outdoor unit

6.2.2 To open the electrical component box of the outdoor unit

6.1 Overview: Installation

6.3 Mounting the outdoor unit

6.3.1 To provide the installation structure

6.4 Connecting the refrigerant piping

6.4.1 Precautions when connecting refrigerant piping

6.4.2 About connecting the refrigerant piping

6.4.3 To route the refrigerant piping

6.4.4 To connect the refrigerant piping to the outdoor unit

6.4.5 To connect the multi connection piping kit

6.4.6 Multiple outdoor units: Knockout holes

6.4.7 To connect the refrigerant branching kit

6.4.9 To braze the pipe end

6.4.8 To protect against contamination

6.4.10 Using the stop valve and service port

To handle the stop valve

To open the stop valve

To handle the service port

Daikin RYYQ8T7Y1B, RYYQ10T7Y1B, RYYQ12T7Y1B, RYYQ14T7Y1B, RYYQ16T7Y1B* Installer reference guide