Daikin REYQ8U7Y1B, REYQ10U7Y1B, REYQ12U7Y1B, REYQ14U7Y1B, REYQ16U7Y1B Installer reference guide

...

Installer and user

reference guide

VRV IV+ heat recovery

REYQ8U7Y1B REYQ10U7Y1B REYQ12U7Y1B REYQ14U7Y1B REYQ16U7Y1B REYQ18U7Y1B REYQ20U7Y1B

REMQ5U7Y1B

Installer and user reference guide

VRV IV+ heat recovery

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 (only for 14+16 HP) ............ 8

3.6 To remove the transportation stay (only for 18+20 HP) ............ 9

4 About the units and options 9

4.1 Overview: About the units and options...................................... 9

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

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

4.4 System layout............................................................................ 10

4.5 Combining units and options ..................................................... 10

4.5.1 About combining units and options............................. 10

4.5.2 Possible combinations of indoor units......................... 10

4.5.3 Possible combinations of outdoor units ...................... 10

4.5.4 Possible options for the outdoor unit........................... 11

5 Preparation 11

5.1 Overview: Preparation............................................................... 11

5.2 Preparing the 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.................... 13

5.3 Preparing refrigerant piping....................................................... 14

5.3.1 Refrigerant piping requirements.................................. 14

5.3.2 To select the piping size ............................................. 14

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

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

5.3.5 Single outdoor units and standard multi-outdoor-unit

combinations >20 HP.................................................. 16

5.3.6 Standard multi-outdoor-unit combinations ≤20 HP

and free multi-outdoor-unit combinations.................... 18

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

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

5.4.1 About preparing electrical wiring................................. 20

5.4.2 About electrical compliance ........................................ 20

5.4.3 Safety device requirements ........................................ 21

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 .............................................................................. 22

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

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

6.4 Connecting the refrigerant piping ............................................... 23

6.4.1 Precautions when connecting the refrigerant piping.... 23

6.4.2 About connecting the refrigerant piping ....................... 23

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

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 .................................................. 25

6.4.10 Using the stop valve and service port .......................... 25

6.4.11 To remove the pinched pipes....................................... 26

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

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

6.5.2 Checking refrigerant piping: General guidelines.......... 27

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................................................ 28

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........... 29

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 the 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

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....................... 38

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 ............................................................. 39

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 ..... 43

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

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

7.3.2 Available comfort settings ............................................ 44

7.3.3 Example: Automatic mode during cooling.................... 45

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

7.4 Using the leak detection function ............................................... 46

7.4.1 About automatic leak detection.................................... 46

7.4.2 To manually perform a leak detection.......................... 46

8 Commissioning 47

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

8.2 Precautions when commissioning .............................................. 47

8.3 Checklist before commissioning................................................. 47

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

8.5 To perform a test run.................................................................. 48

8.6 Correcting after abnormal completion of the test run ................. 48

Installer and user reference guide

REYQ8~20+REMQ5U7Y1B

VRV IV+ heat recovery 4P561154-1 – 2018.09

1 General safety precautions

8.7 Operating the unit...................................................................... 48

9 Maintenance and service 49

9.1 Overview: Maintenance and service ......................................... 49

9.2 Maintenance safety precautions................................................ 49

9.2.1 To prevent electrical hazards...................................... 49

9.3 About service mode operation................................................... 49

9.3.1 To use vacuum mode ................................................. 49

9.3.2 To recover refrigerant ................................................. 49

10 Troubleshooting 49

10.1 Overview: Troubleshooting........................................................ 49

10.2 Solving problems based on error codes .................................... 49

10.3 Error codes: Overview ............................................................... 50

11 Disposal 53

12 Technical data 54

12.1 Overview: Technical data .......................................................... 54

12.2 Service space: Outdoor unit ...................................................... 54

12.3 Piping diagram: Outdoor unit..................................................... 55

12.4 Wiring diagram: Outdoor unit .................................................... 57

For the user 59

13 About the system 59

13.1 System layout ............................................................................ 59

14 User interface 60

15 Before operation 60

16 Operation 60

16.1 Operation range ........................................................................ 60

16.2 Operating the system ................................................................ 60

16.2.1 About operating the system ........................................ 60

16.2.2 About cooling, heating, fan only, and automatic

operation ..................................................................... 60

16.2.3 About the heating operation ........................................ 60

16.2.4 To operate the system (WITHOUT cool/heat

changeover remote control switch) ............................. 61

16.2.5 To operate the system (WITH cool/heat changeover

remote control switch)................................................. 61

16.3 Using the dry program ............................................................... 61

16.3.1 About the dry program ................................................ 61

16.3.2 To use the dry program (WITHOUT cool/heat

changeover remote control switch) ............................. 62

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

remote control switch)................................................. 62

16.4 Adjusting the air flow direction................................................... 62

16.4.1 About the air flow flap ................................................. 62

16.5 Setting the master user interface .............................................. 62

16.5.1 About setting the master user interface ...................... 62

16.5.2 To designate the master user interface (VRV DX and

Hydrobox) ................................................................... 63

16.6 About control systems ............................................................... 63

17 Energy saving and optimum operation 63

17.1 Available main operation methods ............................................ 63

17.2 Available comfort settings ......................................................... 63

18 Maintenance and service 64

18.1 Maintenance after a long stop period ........................................ 64

18.2 Maintenance before a long stop period ..................................... 64

18.3 About the refrigerant.................................................................. 64

18.4 After-sales service and warranty ............................................... 64

18.4.1 Warranty period .......................................................... 64

18.4.2 Recommended maintenance and inspection .............. 64

18.4.3 Recommended maintenance and inspection cycles ... 65

18.4.4 Shortened maintenance and replacement cycles ....... 65

19.1 Error codes: Overview ................................................................ 66

19.2 Symptoms that are NOT system malfunctions ........................... 67

19.2.1 Symptom: The system does not operate ..................... 67

19.2.2 Symptom: Cool/Heat cannot be changed over ............ 67

19.2.3 Symptom: Fan operation is possible, but cooling and

heating do not work...................................................... 67

19.2.4 Symptom: The fan speed does not correspond to the

setting .......................................................................... 67

19.2.5 Symptom: The fan direction does not correspond to

the setting .................................................................... 67

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

unit) .............................................................................. 67

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

unit, outdoor unit) ......................................................... 67

19.2.8 Symptom: The user interface display reads "U4" or "U5" and stops, but then restarts after a few minutes.. 67

19.2.9 Symptom: Noise of air conditioners (Indoor unit) ......... 67

19.2.10 Symptom: Noise of air conditioners (Indoor unit,

outdoor unit)................................................................. 67

19.2.11 Symptom: Noise of air conditioners (Outdoor unit) ...... 67

19.2.12 Symptom: Dust comes out of the unit .......................... 68

19.2.13 Symptom: The units can give off odours...................... 68

19.2.14 Symptom: The outdoor unit fan does not spin ............. 68

19.2.15 Symptom: The display shows "88"............................... 68

19.2.16 Symptom: The compressor in the outdoor unit does

not stop after a short heating operation ....................... 68

19.2.17 Symptom: The inside of an outdoor unit is warm

even when the unit has stopped .................................. 68

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

stopped ........................................................................ 68

20 Relocation 68

21 Disposal 68

22 Technical data 68

22.1 Information requirements for Eco Design ................................... 68

23 Glossary 68

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 authorised 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.

DANGER: RISK OF EXPLOSION

Indicates a situation that could result in explosion.

19 Troubleshooting 65

REYQ8~20+REMQ5U7Y1B VRV IV+ heat recovery 4P561154-1 – 2018.09

Installer and user reference guide

1 General safety precautions

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:

This means that electrical and electronic products may NOT be mixed with unsorted household waste. Do NOT try to dismantle the system yourself: the dismantling of the system, treatment of the refrigerant, of oil and of other parts must be done by an authorized installer and must comply with applicable legislation. Units must be treated at a specialized treatment facility for reuse, recycling and recovery. By ensuring this product is disposed of correctly, you will help to prevent potential negative consequences for the environment and human health. For more information, contact your installer or local authority.

▪ Batteries are marked with the following symbol:

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

1.3 For the installer

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.

CAUTION

Do NOT touch the air inlet or aluminium 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.

Installer and user reference guide

REYQ8~20+REMQ5U7Y1B

VRV IV+ heat recovery 4P561154-1 – 2018.09

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 weight and vibration

of the unit.

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

ventilation openings.

▪ Make sure the unit is level.

Do NOT install the unit in the following places:

▪ In potentially explosive atmospheres.

▪ In places where there is machinery that emits electromagnetic

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

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

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

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

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

1.3.3 Refrigerant

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

NOTICE

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

NOTICE

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

WARNING

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

DANGER: RISK OF EXPLOSION

Pump down – Refrigerant leakage. If you want to pump

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

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

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

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

compressor does NOT have to operate.

WARNING

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.

▪ Only use tools exclusively for the refrigerant type used in the

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

▪ Charge the liquid refrigerant as follows:

If Then

A siphon tube is present

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

A siphon tube is NOT present Charge with the cylinder upside

Charge with the cylinder upright.

down.

WARNING

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

▪ Excessive refrigerant concentrations in a closed room

can lead to oxygen deficiency.

▪ Toxic gas may be produced if refrigerant gas comes

into contact with fire.

REYQ8~20+REMQ5U7Y1B VRV IV+ heat recovery 4P561154-1 – 2018.09

▪ Open refrigerant cylinders slowly.

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

prevent normal operation.

CAUTION

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

Installer and user reference guide

1 General safety precautions

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.

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, MUST be installed in the fixed wiring.

WARNING

▪ ONLY use copper wires.

▪ Make sure the field wiring complies with the applicable

legislation.

▪ All field wiring MUST be performed in accordance with

the wiring diagram supplied with the product.

▪ NEVER squeeze bundled cables and make sure they

do NOT come in contact with the piping and sharp edges. Make sure no external pressure is applied to the terminal connections.

▪ Make sure to install earth wiring. Do NOT earth the unit

to a utility pipe, surge absorber, or telephone earth. Incomplete earth may cause electrical shock.

▪ Make sure to use a dedicated power circuit. NEVER

use a power supply shared by another appliance.

▪ Make sure to install the required fuses or circuit

breakers.

▪ Make sure to install an earth leakage protector. Failure

to do so may cause electric shock or fire.

▪ When installing the earth leakage protector, make sure

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

CAUTION

When connecting the power supply, the earth connection must be made before the current-carrying connections are established. When disconnecting the power supply, the current-carrying connections must be separated before the earth connection is. The length of the conductors between the power supply stress relief and the terminal block itself must be as such that the current-carrying wires are tautened before the earth wire is in case the power supply is pulled loose from the stress relief.

NOTICE

Precautions when laying power wiring:

▪ Do NOT connect wiring of different thicknesses to the

power terminal block (slack in the power wiring may cause abnormal heat).

▪ When connecting wiring which is the same thickness,

do as shown in the figure above.

▪ For wiring, use the designated power wire and connect

firmly, then secure to prevent outside pressure being exerted on the terminal board.

▪ Use an appropriate screwdriver for tightening the

terminal screws. A screwdriver with a small head will damage the head and make proper tightening impossible.

▪ Over-tightening the terminal screws may break them.

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.

Installer and user reference guide

REYQ8~20+REMQ5U7Y1B

VRV IV+ heat recovery 4P561154-1 – 2018.09

2 About the documentation

WARNING

▪ After finishing the electrical work, confirm that each

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

▪ Make sure all covers are closed before starting up the

unit.

NOTICE

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

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

2 About the documentation

2.1 About this document

Target audience

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)

▪ 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).

For the installer

3 About the box

3.1 Overview: About the box

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

It contains information about:

▪ Unpacking and handling the outdoor unit

▪ Removing the accessories from the unit

Keep the following in mind:

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

MUST be reported immediately to the 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.

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

advance.

▪ 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

Remove the packaging material from the unit:

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

with a cutter.

REYQ8~20+REMQ5U7Y1B VRV IV+ heat recovery 4P561154-1 – 2018.09

Installer and user reference guide

3 About the box

5~12 HP

14~20 HP

14~20 HP5~12 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

▪ 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.

3.3 To remove the accessories from the outdoor unit

3.4 Accessory pipes: Diameters

Accessory pipes (mm) HP Øa Øb

Gas pipe

▪ Front connection

▪ Bottom connection

Liquid pipe

▪ Front connection

▪ Bottom connection

High pressure/low pressure gas pipe

▪ Front connection

▪ Bottom connection

5 25.4 19.1

10 22.2

12 28.6

(a)

18+20

31.8 41.4

5 9.5 9.5

12 12.7

14 12.7

18 15.9

5 19.1 15.9

10 19.1

14 22.2

20 28.6

Make sure that all accessories are available in the unit.

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

(a) Only in combination with the outdoor unit multi-connection

piping kit.

3.5 To remove the transportation stay (only for 14+16 HP)

The transportation stays for protecting the unit during transport must be removed. Proceed as shown in the figure and procedure below.

NOTICE

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

1 Slightly loosen the bolt (a).

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

below.

3 Tighten the bolt (a) again.

Installer and user reference guide

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VRV IV+ heat recovery 4P561154-1 – 2018.09

(x2)

121

(12.3 N·m)

3.6 To remove the transportation stay

(12.3 N·m)

222

a b

e c

14~20 HP5~12 HP

(only for 18+20 HP)

The transportation stays for protecting the unit during transport must be removed. Proceed as shown in the figure and procedure below.

NOTICE

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

1 Slightly loosen the bolt (a).

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

below.

3 Tighten the bolt (a) again.

4 Slightly loosen the bolt (c).

5 Remove the bolt (d) of the transportation stay (e).

6 Remove the transportation stay (e) as shown in the figure

below.

7 Tighten the bolt (c) again.

4 About the units and options

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

units

▪ 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 E Y Q 18 U7 Y1 B [*]

Code Explanation

R Outdoor air cooled

E Heat recovery

Y Y=Single or multi module

M=Multi module only

Q Refrigerant R410A

18 Capacity class

U7 Model series

Y1 Power supply

B European market

[*] Minor model change indication

4.3 About the outdoor unit

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

Model line up:

Model Description

REYQ8~20 Heat recovery model for single or multi-use

REMQ5 Heat recovery model for multi-use only

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

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

REYQ8~20+REMQ5U7Y1B VRV IV+ heat recovery 4P561154-1 – 2018.09

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.

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.

Installer and user reference guide

4 About the units and options

k l

e e

f h

c c

kkk

4.4 System layout

NOTICE

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

INFORMATION

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

units"on page10.

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.

4.5.2 Possible combinations of indoor units

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

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

▪ HT (high temperature) Hydrobox (air-to-water applications): HXHD

series (heating only).

▪ LT (low temperature) Hydrobox (air-to-water applications):

HXY080/125 series.

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

depending on the application.

▪ Comfort air curtain (air-to-air applications): CYVS (Biddle) series.

4.5.3 Possible combinations of outdoor units

Possible standalone outdoor units

Non-continuous heating

REYQ8

REYQ10

REYQ12

REYQ14

REYQ16

REYQ18

REYQ20

Possible standard combinations of outdoor units

INFORMATION

U-series units cannot share the same refrigerant circuit with T-series units. However, electrically, U-series units and T-series units can be connected via F1/F2.

4.5 Combining units and options

a Outdoor unit b Refrigerant piping c BS unit d Multi BS unit e VRV DX indoor unit

f LT Hydrobox unit g Cooling only VRV indoor unit h HT Hydrobox unit

i EKEXV kit j AHU

k User interface

l Wireless user interface

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 recovery.

The VRV IV heat recovery 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.

▪ REYQ10~54 consist of 2 or 3 REYQ8~20 or REMQ5 units.

▪ REMQ5 units cannot be used as standalone outdoor units.

Continuous heating

REYQ10 = REMQ5 + 5

REYQ13 = REYQ8 + REMQ5

REYQ16 = REYQ8 + 8

REYQ18 = REYQ8 + 10

REYQ20 = REYQ8 + 12

REYQ22 = REYQ10 + 12

REYQ24 = REYQ8 + 16

REYQ26 = REYQ12 + 14

REYQ28 = REYQ12 + 16

REYQ30 = REYQ12 + 18

REYQ32 = REYQ16 + 16

REYQ34 = REYQ16 + 18

REYQ36 = REYQ16 + 20

REYQ38 = REYQ8 + 12 + 18

REYQ40 = REYQ10 + 12 + 18

REYQ42 = REYQ10 + 16 + 16

REYQ44 = REYQ12 + 16 + 16

REYQ46 = REYQ14 + 16 + 16

REYQ48 = REYQ16 + 16 + 16

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REYQ8~20+REMQ5U7Y1B

VRV IV+ heat recovery 4P561154-1 – 2018.09

5 Preparation

baa

df e

(mm)

≥

1500

≥

1500

≥

1500

≥

1000≥1000

≥

1000≥1000

≥

1000≥1000

Continuous heating

REYQ50 = REYQ16 + 16 + 18

REYQ52 = REYQ16 + 18 + 18

REYQ54 = REYQ18 + 18 + 18

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 KHRQ23M29H

KHRQ23M64H

KHRQ23M75H

Refnet joint KHRQ23M20T

KHRQ23M29T9

KHRQ23M64T

KHRQ23M75T

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 BHFQ23P907

3 BHFQ23P1357

PC configurator cable (EKPCCAB)

For VRV IV heat recovery system it is also possible to 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 5~12 HP EKBPH012TA

Heater tape kit for 14~20 HP EKBPH020TA

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

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

Demand PCB (EKRP1AHTA)

To enable the power saving consumption control by digital inputs you must install the demand PCB.

For installation instructions, see the installation manual of the demand PCB and addendum book for optional equipment.

▪ Preparing the refrigerant piping

▪ Preparing the electrical wiring

5.2 Preparing the 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 weight and vibration

of the unit.

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

ventilation openings.

▪ Make sure the unit is level.

▪ 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.

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.

5 Preparation

5.1 Overview: Preparation

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

It contains information about:

▪ Preparing the installation site

REYQ8~20+REMQ5U7Y1B VRV IV+ heat recovery 4P561154-1 – 2018.09

a Personal computer or radio b Fuse c Earth leakage protector d User interface e Indoor unit

f Outdoor unit

Installer and user reference guide

5 Preparation

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.

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13.

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.

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.

▪ To prevent exposure to wind and snow, install a baffle plate on the

air side of the outdoor unit:

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.

Install the outdoor unit away from direct sea winds.

Example: Behind the building.

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

▪ Height of windbreaker≥1.5×height of outdoor unit

▪ Mind the service space requirements when installing the

windbreaker.

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.

a Sea wind b Building c Outdoor unit d Windbreaker

Installer and user reference guide

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VRV IV+ heat recovery 4P561154-1 – 2018.09

NOTICE

(°C WB)

a b

15.5 15

–5

–10

–15

–20

10 15 20 25

(°C DB)

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 (EKBPH012TA or EKBPH020TA) to keep the drain holes free.

5.2.3 Securing safety against refrigerant leaks

5 Preparation

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

the refrigerant from the system)

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

To check the maximum concentration level

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

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

separately.

Formula A+B=C

A Amount of refrigerant in a single unit system

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

B Additional charging amount (amount of

refrigerant added locally)

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.

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.

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.

REYQ8~20+REMQ5U7Y1B VRV IV+ heat recovery 4P561154-1 – 2018.09

D When there are no smaller room divisions:

E When there is a room division that has an opening

sufficiently large to permit free air flow.

a Opening between the rooms. In case there is a door the openings above and below the door each must be equivalent in size to 0.15% or more of the floor area.

b Room division

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.

Installer and user reference guide

5 Preparation

D E

C C

1 2

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 to the greenhouse effect if it is released. Therefore pay 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.

▪ Only use phosphoric acid deoxidised seamless copper.

▪ 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.

Pipe Ø Temper grade of piping material

≤15.9mm O (annealed)

≥19.1mm 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

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

1,2 VRVDX indoor unit

3 BS unit 4 Cooling-only VRV indoor unit

A~E Piping

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)

5~8 9.5 19.1 15.9

10 9.5 22.2 19.1

12 12.7 28.6 19.1

14~16 12.7 28.6 22.2

18 15.9 28.6 22.2

20~22 15.9 28.6 28.6

24 15.9 34.9 28.6

26~34 19.1 34.9 28.6

36 19.1 41.3 28.6

38~54 19.1 41.3 34.9

Piping outer diameter size (mm)

Liquid pipe Suction gas

pipe

High pressure/low pressure gas

pipe

D: Piping between refrigerant branch kits or refrigerant branch kit and BS unit

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

Indoor unit capacity

index

<150 9.5 15.9 12.7

150≤x<200 19.1 15.9

200≤x<290 22.2 19.1

290≤x<420 12.7 28.6

420≤x<640 15.9 28.6

640≤x<920 19.1 34.9

≥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]

Piping outer diameter size (mm)

Liquid pipe Suction gas

pipe

High pressure/low pressure gas

pipe

Installer and user reference guide

E: Piping between refrigerant branch kit or BS unit 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

Piping outer diameter size (mm)

Gas pipe Liquid pipe

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VRV IV+ heat recovery 4P561154-1 – 2018.09

5 Preparation

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

▪ If a size-up of the piping is required, refer to the table below.

a Outdoor unit

b Main pipes

c Increase

d First refrigerant branch kit

e Indoor unit

Size up

HP class Liquid piping outer diameter size (mm)

5~8 9.5 → 12.7

12+14 12.7 → 15.9

18~22 15.9 → 19.1

26~34 19.1 → 22.2

36~54

▪ 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29.

5.3.3 To select refrigerant branch kits

Refrigerant refnets

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

page14.

▪ 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).

Outdoor unit capacity type

(HP)

8+10 KHRQ23M29T9

12~22 KHRQ23M64T

3 pipes

Outdoor unit capacity type

3 pipes

(HP)

24~54 KHRQ23M75T

▪ 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 3 pipes

<200 KHRQ23M20T

200≤x<290 KHRQ23M29T9

290≤x<640 KHRQ23M64T

≥640 KHRQ23M75T

▪ 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 3 pipes

<200 KHRQ23M29H

200≤x<290

290≤x<640 KHRQ23M64H

(a)

≥640 KHRQ23M75H

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

KHRQ23M75H 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 BHFQ23P907

3 BHFQ23P1357

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

Make sure the piping installation does not exceed the maximum allowable pipe length, the allowable level difference, and the allowable length after branching. To illustrate the piping length requirements, 6 cases are discussed in the chapters below. They describe both standard and non-standard outdoor unit combinations with VRV DX indoor units, Hydrobox units and/or air handling units (AHU).

Definitions

Term Definition

Actual piping length Pipe length between outdoor and

Equivalent piping length Pipe length between outdoor and

Total piping length Total piping length, from the

Equivalent length of the piping accessories

Accessory Equivalent length

Refnet joint 0.5m

indoor units

indoor units, including the equivalent length of the piping accessories

outdoor to all indoor units

REYQ8~20+REMQ5U7Y1B VRV IV+ heat recovery 4P561154-1 – 2018.09

Installer and user reference guide

5 Preparation

1 5

3 2

b b

Accessory Equivalent length

Refnet header 1m

Single BS1Q100~160 4m

Single BS1Q25 6m

Multi BS4~16Q14 4m

Allowable height difference

Term Definition Height difference

H1 Height difference

between outdoor and indoor units

H2 Height difference

between indoor units

H3 Height difference

between outdoor units

H4 Height difference

between EKEXV‑kits and AHU units.

(a) If single outdoor units or standard multi-outdoor

combinations >20HP are connected to only VRV DX indoor units, then the height difference between indoor units (=H2) can be increased from 15 to 30m. However, this limits the allowable maximum length of the longest pipe (see "Connection with only VRV DX indoor units"on

page16).

(b) The allowable height difference is 50m in case the outdoor

unit is positioned higher than the indoor unit, and 40m in case the outdoor unit is positioned lower than the indoor unit. If only VRV DX indoor units are used, the allowable height difference between outdoor and indoor units may be extended to 90m, without the need of an additional option kit. In this case, make sure all conditions below are met:

If Then

The outdoor unit is positioned

▪ Minimum connection ratio:

higher than the indoor units

▪ Size up the liquid piping (refer

▪ Activate the outdoor unit

The outdoor unit is positioned

▪ Minimum connection ratio

lower than the indoor units

▪ Size up the liquid piping (refer

▪ Activate the outdoor unit

▪ No technical cooling

(m)

(b)

50/40

(a)

80%

to "5.3.2 To select the piping

size" on page 14 for more

information)

setting. Refer to the service manual for more information.

varies according to the height difference between outdoor and indoor units:

▪ 40~60m: 80%

▪ 60~65m: 90%

▪ 65~80m: 100%

▪ 80~90m: 110%

to "5.3.2 To select the piping

size" on page 14 for more

information)

setting. Refer to the service manual for more information.

5.3.5 Single outdoor units and standard multioutdoor-unit combinations >20 HP

Connection with only VRV DX indoor units

a Outdoor unit b VRV DX indoor unit c Multi BS unit d BS unit e VRV DX indoor unit

Pipe Maximum length (actual/

Longest pipe from the outdoor unit or the last multi-outdoor piping branch (1+2, 1+3, 1+5)

Longest pipe after the first branch (2, 3, 5)

In case of a multi-outdoor setup: longest pipe from the outdoor unit to the last multi-outdoor piping branch (4)

Total pipe length 1000m/—

(a) If the equivalent piping length is more than 90m, size up

the main liquid piping according to "5.3.2To select the

piping size"on page14.

(b) If the height difference between indoor units (=H2) is

between 15 and 30m, then the allowable maximum length of the longest pipe is limited to 120/165m (actual/ equivalent).

conditions are met:

1 In case of BS1Q units, the piping length between all indoor

units and the nearest branch kit is ≤40m.

2 In case of multi BS units, the piping length between all indoor

units and the multi BS unit is ≤40m.

3 It is required to size up the liquid piping between the first branch

kit and the last. Beware that in contrast to multi BS units, BS1Q units are NOT considered branch kits. If the increased pipe size is larger than the pipe size of the main pipe, also increase the size of the main pipe.

4 After sizing up the liquid piping (previous condition), double its

length in the calculation of the total piping length. Make sure the total piping length is within limitations.

5 The piping length difference between the nearest indoor unit to

the outdoor unit and the farthest indoor unit to the outdoor unit is ≤40m.

equivalent)

165m/190m

120m/165m

(c)

40m/—

10m/13m

(a)

(b)

Installer and user reference guide

REYQ8~20+REMQ5U7Y1B

VRV IV+ heat recovery 4P561154-1 – 2018.09

5 Preparation

1 2

3 5

1 2

Connection with VRV DX indoor units and Hydrobox units

a Outdoor unit

b VRV DX indoor unit

c Multi BS unit

d LT Hydrobox unit

e HT Hydrobox unit

Pipe Maximum length (actual/

Longest pipe from the outdoor unit or the last multi-outdoor piping branch (1+2, 1+3, 1+5)

Longest pipe after the first branch (2, 3, 5)

In case of a multi-outdoor setup: longest pipe from the outdoor unit to the last multi-outdoor piping branch (4)

Total pipe length 300m/600m

(a) If the equivalent piping length is more than 90m, size up

the main liquid piping according to "5.3.2To select the

piping size"on page14.

(b) In this case, both are actual piping lengths: outdoor units

≤20HP / outdoor units >20HP.

equivalent)

135m/160m

40m

10m/13m

Connection with VRV DX indoor units and air handling units

a Outdoor unit b VRV DX indoor unit c Multi BS unit

(a)

Longest pipe from the outdoor unit or the last multi-outdoor piping branch (1+2, 1+3, 1+5)

Longest pipe after the first

(b)

branch (2, 3, 5)

In case of a multi-outdoor setup: longest pipe from the outdoor unit to the last multi-outdoor piping branch (4)

Total pipe length 1000m/—

d BS unit e EKEXV kit

f AHU

Pipe Maximum length (actual/

equivalent)

165m/190m

(a)

40m/—

10m/13m

(a) If the equivalent piping length is more than 90m, size up

the main liquid piping according to "5.3.2To select the

piping size"on page14.

REYQ8~20+REMQ5U7Y1B VRV IV+ heat recovery 4P561154-1 – 2018.09

Installer and user reference guide

5 Preparation

1 5

3 2

b b

1 2

3 5

5.3.6 Standard multi-outdoor-unit combinations ≤20 HP and free multi-outdoor-unit combinations

Connection with only VRV DX indoor units

a Outdoor unit b VRV DX indoor unit c Multi BS unit d BS unit e VRV DX indoor unit

Pipe Maximum length (actual/

Longest pipe from the outdoor unit or the last multi-outdoor piping branch (1+2, 1+3, 1+5)

Longest pipe after the first branch (2, 3, 5)

In case of a multi-outdoor setup: longest pipe from the outdoor unit to the last multi-outdoor piping branch (4)

Total pipe length 500m/—

(a) If the equivalent piping length is more than 90m, size up

the main liquid piping according to "5.3.2To select the

piping size"on page14.

1 In case of BS1Q units, the piping length between all indoor

(b) An extension up to 90m is possible if all of the following

conditions are met:

units and the nearest branch kit is ≤40m.

2 In case of multi BS units, the piping length between all indoor

units and the multi BS unit is ≤40m.

3 It is required to size up the liquid piping between the first branch

4 After sizing up the liquid piping (previous condition), double its

length in the calculation of the total piping length. Make sure the total piping length is within limitations.

5 The piping length difference between the nearest indoor unit to

the outdoor unit and the farthest indoor unit to the outdoor unit is ≤40m.

Installer and user reference guide

equivalent)

135m/160m

40m/—

10m/13m

Connection with VRV DX indoor units and Hydrobox units

a Outdoor unit b VRV DX indoor unit c Multi BS unit d LT Hydrobox unit e HT Hydrobox unit

Pipe Maximum length (actual/

Longest pipe from the outdoor unit or the last multi-outdoor

(a)

piping branch (1+2, 1+3, 1+5)

Longest pipe after the first branch (2, 3, 5)

(b)

In case of a multi-outdoor setup: longest pipe from the outdoor unit to the last multi-outdoor piping branch (4)

Total pipe length 300m/500m

(a) If the equivalent piping length is more than 90m, size up

the main liquid piping according to "5.3.2To select the

piping size"on page14.

(b) In this case, both are actual piping lengths: outdoor units

≤20HP / outdoor units >20HP.

equivalent)

135m/160m

(a)

40m/—

10m/13m

(b)

REYQ8~20+REMQ5U7Y1B

VRV IV+ heat recovery 4P561154-1 – 2018.09

Connection with VRV DX indoor units and air

1 2

a b

b b b

≥200 mm

≤2 m

≤2 m ≤2 m

≥200 mm

>2 m >2 m

handling units

5 Preparation

a To indoor unit b Piping between outdoor units

X Not allowed (oil remains in piping)

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.

a Outdoor unit

b VRV DX indoor unit

c Multi BS unit

d BS unit

e EKEXV kit

f AHU

Pipe Maximum length (actual/

equivalent)

Longest pipe from the outdoor

135m/160m unit or the last multi-outdoor piping branch (1+2, 1+3, 1+5)

Longest pipe after the first

40m/—

branch (2, 3, 5)

In case of a multi-outdoor setup:

10m/13m longest pipe from the outdoor unit to the last multi-outdoor piping branch (4)

Total pipe length 500m/—

(a) If the equivalent piping length is more than 90m, size up

the main liquid piping according to "5.3.2To select the

piping size"on page14.

5.3.7 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

a To indoor unit

b Oil collects to the outmost outdoor unit when the system

(a)

stops

X Not allowed

O Allowed

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

a rise of 200 mm or more in the suction gas line and the high pressure/low pressure gas line within a length of 2m from the kit.

If Then

≤2m

>2m

REYQ8~20+REMQ5U7Y1B VRV IV+ heat recovery 4P561154-1 – 2018.09

a To indoor unit

b Piping between outdoor units

Installer and user reference guide

5 Preparation

A B C

a b c

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.

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 preparing electrical wiring

INFORMATION

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

WARNING

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

equipment might break down.

▪ Establish proper earthing. Do NOT earth the unit to a

utility pipe, surge absorber, or telephone earth. Incomplete earthing may cause electrical shock.

▪ Install the required fuses or circuit breakers.

▪ Secure the electrical wiring with cable ties so that the

cables do NOT come in contact with sharp edges or piping, particularly on the high-pressure side.

▪ Do NOT use taped wires, stranded conductor wires,

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

▪ Do NOT install a phase advancing capacitor, because

this unit is equipped with an inverter. A phase advancing capacitor will reduce performance and may cause accidents.

WARNING

▪ All wiring MUST be performed by an authorised

electrician and MUST comply with the applicable legislation.

▪ Make electrical connections to the fixed wiring.

▪ All components procured on-site and all electrical

construction MUST comply with the applicable legislation.

WARNING

The backup heater MUST have a dedicated power supply and MUST be protected by the safety devices required by the applicable legislation.

WARNING

ALWAYS use multicore cable for power supply cables.

5.4.2 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

sys

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.

Single outdoor unit

Model Z

(Ω) Minimum S

max

value (kVA)

REMQ5 — 2893

REYQ8 — 2893

REYQ10 — 3954

REYQ12 — 4313

REYQ14 — 4852

REYQ16 — 5391

REYQ18 — 6289

REYQ20 — 7009

Multiple outdoor units

Model Z

(Ω) Minimum S

max

value (kVA)

REYQ10 — 5786

REYQ13 — 5786

REYQ16 — 5786

REYQ18 — 6846

REYQ20 — 7206

REYQ22 — 8266

REYQ24 — 8284

REYQ26 — 9165

REYQ28 — 9704

REYQ30 — 10602

REYQ32 — 10781

REYQ34 — 11680

REYQ36 — 12399

REYQ38 — 13495

REYQ40 — 14556

REYQ42 — 14735

REYQ44 — 15094

REYQ46 — 15634

REYQ48 — 16172

REYQ50 — 17071

REYQ52 — 17969

Installer and user reference guide

REYQ8~20+REMQ5U7Y1B

VRV IV+ heat recovery 4P561154-1 – 2018.09

6 Installation

Multiple outdoor units

Model Z

REYQ54 — 18868

INFORMATION

Multi units are standard combinations.

(Ω) Minimum S

max

value (kVA)

5.4.3 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.

Single outdoor unit

Model Minimum

circuit

ampacity

REMQ5 16.1A 20A

REYQ8 16.1A 20A

REYQ10 22.0A 25A

REYQ12 24.0A 32A

REYQ14 27.0A 32A

REYQ16 31.0A 40A

REYQ18 35.0A 40A

REYQ20 39.0A 50A

Multi outdoor units

Model Minimum

circuit

ampacity

REYQ10 30.0A 40A

REYQ13 30.0A 40A

REYQ16 30.0A 40A

REYQ18 37.0A 50A

REYQ20 39.0A 50A

REYQ22 46.0A 63A

REYQ24 46.0A 63A

REYQ26 51.0A 63A

REYQ28 55.0A 63A

REYQ30 59.0A 80A

REYQ32 62.0A 80A

REYQ34 66.0A 80A

REYQ36 70.0A 80A

REYQ38 74.0A 100A

REYQ40 81.0A 100A

REYQ42 84.0A 100A

REYQ44 86.0A 100A

REYQ46 89.0A 100A

REYQ48 93.0A 125A

REYQ50 97.0A 125A

REYQ52 101.0A 125A

REYQ54 105.0A 125A

Recommended

fuses

Recommended

fuses

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 REYQ30 by using the REYQ8,

REYQ10, and REYQ12.

▪ Minimum circuit ampacity of the REYQ8=16.1A

▪ Minimum circuit ampacity of the REYQ10=22.0A

▪ Minimum circuit ampacity of the REYQ12=24.0A

Accordingly, the minimum circuit ampacity of the REYQ30=16.1+22.0+24.0=62.1A

Multiply the above result by 1.1 ⇒ (62.1A×1.1)=68.3A, so the recommended fuse capacity would be 80A.

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.

Typical workflow

Installation typically consists of the following stages:

1 Opening the units

2 Mounting the outdoor unit

3 Connecting the refrigerant piping

4 Checking the refrigerant piping

5 Insulating the refrigerant piping

6 Charging refrigerant

7 Connecting the electrical wiring

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:

REYQ8~20+REMQ5U7Y1B VRV IV+ heat recovery 4P561154-1 – 2018.09

Installer and user reference guide

6 Installation

14×14×

5~12 HP 14~20 HP

5~12 HP

2×

SW8

14~20 HP

6×

SW8

a b

c d

≥100 mm

729

≤613

≥929

≥AB

(mm)

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22.

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

field setting components"on page38.

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

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.

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.

▪ Stands under the unit must be at least 100mm wide.

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.

Installer and user reference guide

Minimum foundation

a Anchor point (4×)

HP AA AB

5~12 766 992

14~20 1076 1302

REYQ8~20+REMQ5U7Y1B

VRV IV+ heat recovery 4P561154-1 – 2018.09

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