Daikin RWEYQ8T9Y1B, RWEYQ10T9Y1B, RWEYQ12T9Y1B, RWEYQ14T9Y1B Installer reference guide

Installer and user

reference guide

VRV IV water-cooled system air conditioner

RWEYQ8T9Y1B RWEYQ10T9Y1B RWEYQ12T9Y1B RWEYQ14T9Y1B

Installer and user reference guide

VRV IV water-cooled 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............................................................................ 5

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 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............................................................................ 9

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 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 Single outdoor units and standard multi-outdoor-unit

combinations............................................................... 16

5.3.6 Multiple outdoor units: Possible layouts...................... 18

5.4 Preparing water piping .............................................................. 19

5.4.1 Water quality requirements ......................................... 19

5.4.2 Water circuit requirements .......................................... 19

5.4.3 Handling the brazed plate heat exchanger ................. 20

5.4.4 About the water flow rate ............................................ 20

5.5 Preparing electrical wiring ......................................................... 21

5.5.1 About electrical compliance ........................................ 21

5.5.2 Safety device requirements ........................................ 22

6 Installation 22

6.1 Overview: Installation ................................................................ 22

6.2 Opening the units ...................................................................... 22

6.2.1 To open the outdoor unit............................................. 22

6.2.2 To open the electrical component box of the outdoor

unit .............................................................................. 23

6.3 Mounting the outdoor unit.......................................................... 23

6.3.1 To provide the installation structure............................ 23

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 ... 24

6.4.5 To connect the multi connection piping kit................... 24

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

6.4.7 To protect against contamination................................. 24

6.4.8 To braze the pipe end .................................................. 25

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

6.4.10 To remove the pinched pipes....................................... 26

6.5 Checking the refrigerant piping .................................................. 27

6.5.1 About checking the refrigerant piping .......................... 27

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

6.5.5 To perform vacuum drying ........................................... 28

6.6 Charging refrigerant ................................................................... 28

6.6.1 Precautions when charging refrigerant ........................ 28

6.6.2 About charging refrigerant ........................................... 29

6.6.3 To determine the additional refrigerant amount........... 29

6.6.4 To charge refrigerant ................................................... 29

6.6.5 Checks after charging refrigerant................................. 30

6.6.6 To fix the fluorinated greenhouse gases label ............. 30

6.7 Connecting the water piping....................................................... 31

6.7.1 About connecting the water piping............................... 31

6.7.2 Precautions when connecting the water piping............ 31

6.7.3 To connect the water piping......................................... 31

6.7.4 To fill the water circuit .................................................. 31

6.7.5 To insulate the water piping ......................................... 31

6.8 Connecting the electrical wiring.................................................. 31

6.8.1 Precautions when connecting electrical wiring ............ 31

6.8.2 Field wiring: Overview.................................................. 32

6.8.3 About the electrical wiring ............................................ 32

6.8.4 To route and fix the transmission wiring ...................... 33

6.8.5 To connect the transmission wiring.............................. 33

6.8.6 To finish the transmission wiring.................................. 34

6.8.7 To route and fix the power supply................................ 34

6.8.8 To connect the power supply ....................................... 34

6.8.9 To connect the optional wiring ..................................... 34

7 Configuration 35

7.1 Overview: Configuration ............................................................. 35

7.2 Making field settings................................................................... 36

7.2.1 About making field settings .......................................... 36

7.2.2 Field setting components ............................................. 36

7.2.3 To access the field setting components....................... 36

7.2.4 To access mode 1 or 2 ................................................ 36

7.2.5 To use mode 1 ............................................................. 37

7.2.6 To use mode 2 ............................................................. 37

7.2.7 Mode 1: Monitoring settings......................................... 38

7.2.8 Mode 2: Field settings.................................................. 38

7.2.9 To connect the PC configurator to the outdoor unit ..... 40

8 Commissioning 40

8.1 Overview: Commissioning.......................................................... 40

8.2 Precautions when commissioning .............................................. 40

8.3 Checklist before commissioning................................................. 40

8.4 About the test run ....................................................................... 41

8.5 To perform a test run.................................................................. 41

8.6 Correcting after abnormal completion of the test run ................. 42

8.7 Operating the unit....................................................................... 42

9 Maintenance and service 42

9.1 Overview: Maintenance and service .......................................... 42

9.2 Maintenance safety precautions................................................. 42

9.2.1 To prevent electrical hazards....................................... 42

9.3 Maintenance of the plate heat exchanger .................................. 42

9.3.1 To clean the plate heat exchanger............................... 42

9.4 About service mode operation.................................................... 43

Installer and user reference guide

VRV IV water-cooled system air conditioner

RWEYQ8~14T9Y1B

4P452191-1A – 2018.03

1 General safety precautions

9.4.1 To use vacuum mode ................................................. 43

9.4.2 To recover refrigerant ................................................. 43

10 Troubleshooting 43

10.1 Overview: Troubleshooting........................................................ 43

10.2 Solving problems based on error codes .................................... 43

11 Disposal 43

12 Technical data 44

12.1 Overview: Technical data .......................................................... 44

12.2 Service space: Outdoor unit ...................................................... 44

12.3 Piping diagram: Outdoor unit..................................................... 44

12.4 Wiring diagram: Outdoor unit .................................................... 45

For the user 46

13 About the system 46

13.1 System layout ............................................................................ 46

14 User interface 47

15 Before operation 47

16 Operation 47

16.1 Operation range ........................................................................ 47

16.2 Operating the system ................................................................ 47

16.2.1 About operating the system ........................................ 47

16.2.2 About cooling, heating, fan only, and automatic

operation ..................................................................... 47

16.2.3 About the heating operation ........................................ 47

16.2.4 To operate the system (WITHOUT cool/heat

changeover remote control switch) ............................. 48

16.2.5 To operate the system (WITH cool/heat changeover

remote control switch)................................................. 48

16.3 Using the dry program ............................................................... 48

16.3.1 About the dry program ................................................ 48

16.3.2 To use the dry program (WITHOUT cool/heat

changeover remote control switch) ............................. 48

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

remote control switch)................................................. 49

16.4 Adjusting the air flow direction................................................... 49

16.4.1 About the air flow flap ................................................. 49

16.5 Setting the master user interface .............................................. 49

16.5.1 About setting the master user interface ...................... 49

16.5.2 To designate the master user interface (VRV DX and

Hydrobox) ................................................................... 49

16.6 About control systems ............................................................... 49

17 Energy saving and optimum operation 49

17.1 Available main operation methods ............................................ 50

17.2 Available comfort settings ......................................................... 50

18 Maintenance and service 50

18.1 Maintenance after a long stop period ........................................ 50

18.2 Maintenance before a long stop period ..................................... 51

18.3 About the refrigerant.................................................................. 51

18.4 After-sales service and warranty ............................................... 51

18.4.1 Warranty period .......................................................... 51

18.4.2 Recommended maintenance and inspection .............. 51

18.4.3 Recommended maintenance and inspection cycles ... 51

18.4.4 Shortened maintenance and replacement cycles ....... 52

19 Troubleshooting 52

19.1 Error codes: Overview ............................................................... 52

19.2 Symptoms that are NOT system malfunctions .......................... 52

19.2.1 Symptom: The system does not operate .................... 52

19.2.2 Symptom: Cool/Heat cannot be changed over ........... 53

19.2.3 Symptom: Fan operation is possible, but cooling and

heating do not work..................................................... 53

19.2.4 Symptom: The fan speed does not correspond to the

setting ......................................................................... 53

19.2.5 Symptom: The fan direction does not correspond to

the setting .................................................................... 53

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

unit) .............................................................................. 53

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

unit, outdoor unit) ......................................................... 53

19.2.8 Symptom: The user interface display reads "U4" or "U5" and stops, but then restarts after a few minutes.. 53

19.2.9 Symptom: Noise of air conditioners (Indoor unit) ......... 53

19.2.10 Symptom: Noise of air conditioners (Indoor unit,

outdoor unit)................................................................. 53

19.2.11 Symptom: Noise of air conditioners (Outdoor unit) ...... 53

19.2.12 Symptom: Dust comes out of the unit .......................... 53

19.2.13 Symptom: The units can give off odours...................... 53

19.2.14 Symptom: The outdoor unit fan does not spin ............. 53

19.2.15 Symptom: The display shows "88"............................... 53

19.2.16 Symptom: The compressor in the outdoor unit does

not stop after a short heating operation ....................... 54

19.2.17 Symptom: The inside of an outdoor unit is warm

even when the unit has stopped .................................. 54

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

stopped ........................................................................ 54

20 Relocation 54

21 Disposal 54

22 Glossary 54

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.

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.

RWEYQ8~14T9Y1B VRV IV water-cooled system air conditioner 4P452191-1A – 2018.03

Installer and user reference guide

1 General safety precautions

NOTICE

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

INFORMATION

Indicates useful tips or additional information.

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:

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.

▪ 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.

Installer and user reference guide

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.

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.

RWEYQ8~14T9Y1B

VRV IV water-cooled system air conditioner

4P452191-1A – 2018.03

1 General safety precautions

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.

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.

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.

A siphon tube is NOT present Charge with the cylinder upside

down.

▪ Open refrigerant cylinders slowly.

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

prevent normal operation.

CAUTION

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

Possible consequence: Incorrect refrigerant amount.

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.

RWEYQ8~14T9Y1B VRV IV water-cooled system air conditioner 4P452191-1A – 2018.03

Installer and user reference guide

1 General safety precautions

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.

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 m away from televisions or radios to prevent interference. Depending on the radio waves, a distance of 1m may not be sufficient.

Installer and user reference guide

WARNING

▪ After finishing the electrical work, confirm that each

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

▪ Make sure all covers are closed before starting up the

unit.

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.

RWEYQ8~14T9Y1B

VRV IV water-cooled system air conditioner

4P452191-1A – 2018.03

2 About the documentation

2.1 About this document

Target audience

Authorised installers + end users

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)

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

▪ 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.

▪ 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).

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.

▪ 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.

▪ 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 5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.

RWEYQ8~14T9Y1B VRV IV water-cooled system air conditioner 4P452191-1A – 2018.03

Installer and user reference guide

3 About the box

4×

1× 1× 1× 1×1×

a b c d e

1× 1× 1×1×

f g h i

Øa

Øb

Øc

Ød

Øa

Øb

Øc

Ød

Øa

Øb

Øc

Ød

(12.3 N·m)

3.3 To remove the accessories from the outdoor unit

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 h Hose

i Water filter

Accessory pipes

HP Øa Øb Øc Ød

(mm)

Gas pipe

▪ Front connection

8 25.4 25.4 25.4 19.1

(a)

10 22.2

12 28.6

▪ Top connection

High pressure/Low pressure gas pipe

▪ Front connection

8 25.4 25.4 25.4 15.9

10 19.1

(a)

14 22.2

▪ Top connection

(a) Braze the straight accessory pipe onto the L-shaped

accessory pipe in order to get the correct diameter to connect the field pipes (for front connection).

3.5 To remove the transportation stay

NOTICE

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

The compressor transportation stay must be removed. It is installed under the compressor leg in order to protect the unit during transport. Proceed as shown in the figure and procedure below.

1 Remove the bolt.

2 Lift the insulation to access the compressor mounting bolt.

3 Slightly loosen the mounting bolt.

4 Remove the transportation stay as shown in the figure below.

5 Tighten the mounting bolt to 12.3N•m of torque.

3.4 Accessory pipes: Diameters

Accessory pipes

(mm)

Liquid pipe

▪ Front connection

▪ Top connection

Installer and user reference guide

HP Øa Øb Øc Ød

8 12.7 12.7 12.7 9.5

(a)

12 12.7

VRV IV water-cooled system air conditioner

RWEYQ8~14T9Y1B

4P452191-1A – 2018.03

4 About the units and options

g g

c c cd

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

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

which outdoor units can be combined

4.2 Identification label: Outdoor unit

Location

These units have (in single use) heating capacities ranging from 25 to 45 kW and cooling capacities ranging from 22.4 to 40kW. When multi combination is used, the capacity can go up to 135 kW for heating and 120kW for cooling.

The unit is designed to work in heating mode at indoor temperatures from 15°C WB to 27°C WB and in cooling mode at indoor temperatures from 21°CDB to 32°CDB or 14°CWB to 25°CWB.

The ambient temperature around the unit should be above 0°C DB and below 40°C DB. Relative humidity around the unit should be below 80%.

The water temperature at the water inlet of the unit must be between 10°C and 45°C. The lower limit is extendable down to –10°C (heating operation mode) in case the brine type setting [2‑50] is set for use with brine as heat source medium.

4.4 System layout

INFORMATION

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

units"on page10.

Heat pump system

Model identification

Example: RW E Y Q 8 T9 Y1 B [*]

Code Explanation

RW Water-cooled

E Heat pump system

Y Heat recovery system

Q Refrigerant R410A

8 Capacity class

T9 Model series

Y1 Power supply

B European market

[*] Minor model change indication

a Unit b Refrigerant piping c VRV DX indoor unit d LT Hydrobox unit 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 h Wireless user interface

i Cool/heat changeover remote control switch

j Water system connection

4.3 About the outdoor unit

This installation manual concerns the VRV IV water-cooled system air conditioner. The unit is full inverter driven, and can be used for cooling, heat pump and heat recovery applications.

Model line up:

Model Description

RWEYQ8~14 Heat recovery model for single or multi-use

Depending on the chosen type of unit, 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 indoor installation and aimed for heat pump applications including water to air and water to water applications.

RWEYQ8~14T9Y1B VRV IV water-cooled system air conditioner 4P452191-1A – 2018.03

Installer and user reference guide

4 About the units and options

k l

e e

f h

c c

kkk

Heat recovery system

4.5 Combining units and options

4.5.1 About combining units and options

NOTICE

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

The VRV IV water cooled 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.

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.

For more information, see "5.3.5 Single outdoor units and standard

multi-outdoor-unit combinations"on page16.

▪ 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):

a 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

m Water system connection

Water system

a Unit b Connection to refrigerant system c Water piping d Dry cooler e Brine loop

f Closed cooling tower g Boiler

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 units

RWEYQ8

RWEYQ10

RWEYQ12

RWEYQ14

Possible standard combinations of units

RWEYQ16~42 consists of 2 or 3 RWEYQ8~14 units.

RWEYQ16 = RWEYQ8 + 8

RWEYQ18 = RWEYQ8 + 10

RWEYQ20 = RWEYQ10 + 10

RWEYQ22 = RWEYQ10 + 12

RWEYQ24 = RWEYQ12 + 12

RWEYQ26 = RWEYQ12 + 14

RWEYQ28 = RWEYQ14 + 14

RWEYQ30 = RWEYQ10 +10 + 10

RWEYQ32 = RWEYQ10 +10 + 12

RWEYQ34 = RWEYQ10 + 12 + 12

RWEYQ36 = RWEYQ12 + 12 + 12

RWEYQ38 = RWEYQ12 + 12 + 14

RWEYQ40 = RWEYQ12 + 14 + 14

RWEYQ42 = RWEYQ14 + 14 + 14

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4P452191-1A – 2018.03

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

In case of heat pump system

Description Model name

Refnet header KHRQ22M29H

KHRQ22M64H

KHRQ22M75H

Refnet joint KHRQ22M20T

KHRQ22M29T9

KHRQ22M64T

KHRQ22M75T

In case of heat recovery system

Description Model name

Refnet header KHRQ23M29H

KHRQ23M64H

KHRQ23M75H

Refnet joint KHRQ23M20T

KHRQ23M29T9

KHRQ23M64T

KHRQ23M75T

Outdoor multi connection piping kit

In case of heat pump system

Number of outdoor units Model name

2 BHFQ22P1007

3 BHFQ22P1517

In case of heat recovery system

Number of outdoor units Model name

2 BHFQ23P907

3 BHFQ23P1357

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 changeover switch KRC19-26A

Cool/heat changeover PCB BRP2A81

With optional fixing box for the switch

INFORMATION

The cool/heat selector can only be used when the

refrigerant system is configured as heat pump system.

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.

KJB111A

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/.

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.

5 Preparation

5.1 Overview: Preparation

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

It contains information about:

▪ Preparing the installation site

▪ Preparing the water piping

▪ 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 unit's weight and

vibration.

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

ventilation openings.

▪ Make sure the unit is level.

▪ Make sure to install the unit in a machine room that is free of

moisture. The unit is designed for indoor use only.

▪ 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.

RWEYQ8~14T9Y1B VRV IV water-cooled system air conditioner 4P452191-1A – 2018.03

NOTICE

This equipment is compliant with Class A of EN55032/ CISPR 32. In a residential environment this equipment may cause radio interference.

Installer and user reference guide

5 Preparation

baa

df e

(mm)

≥

1500

≥

1500

≥

1500

≥

1000≥1000

≥

1000≥1000

≥

1000≥1000

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.

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.

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

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

▪ Install drain piping to ensure proper drainage and insulate piping

to prevent condensation. Improper drain piping may result in indoor water leakage and property damage.

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.

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 accumulate, 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 one of the following cases, calculate the volume of (D), (E) as a single room or as the smallest room:

D When there are no smaller room divisions:

5.2.2 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

Installer and user reference guide

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5 Preparation

B B B

D F

1 2 4 5

B B B

D E

1 2

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.

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 using the total volume of the

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

5.3 Preparing refrigerant piping

Pipe Ø Minimal thickness t

6.4mm/9.5mm/12.7mm 0.80mm

15.9mm 0.99mm

19.1mm/22.2mm 0.80mm

28.6mm 0.99mm

34.9mm 1.21mm

41.3mm 1.43mm

▪ 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 "6.6.3 To determine the additional refrigerant

amount"on page29.

5.3.2 To select the piping size

INFORMATION

Please select the proper pipe sizes depending on the mode of your system. There are 2 possible modes:

▪ heat pump,

▪ heat recovery.

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

In case of heat pump system

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 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.

▪ 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)

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

In case of heat recovery system

▪ All piping lengths and distances have been taken into

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

▪ 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.

RWEYQ8~14T9Y1B VRV IV water-cooled system air conditioner 4P452191-1A – 2018.03

1,2 VRVDX indoor unit

3 BS unit

Installer and user reference guide

5 Preparation

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.

In case of heat pump system

Outdoor unit

capacity type (HP)

8 19.1 9.5

10 22.2

12~16 28.6 12.7

18~22 15.9

24 34.9

26~34 19.1

36~42 41.3

In case of heat recovery system

Outdoor unit

capacity type (HP)

8 9.5 19.1 15.9

10 22.2 19.1

12 12.7 28.6

14~16 22.2

18 15.9

20~22 28.6

24 34.9

26~34 19.1

36 41.3

38~42 34.9

Piping outer diameter size (mm)

Gas pipe Liquid pipe

Piping outer diameter size (mm)

Liquid pipe Suction gas

pipe

High pressure/low pressure gas

pipe

In case of heat recovery system

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

E: Piping between refrigerant branch kit or BS unit and indoor unit

For heat pump and heat recovery system

Pipe size for direct connection to indoor unit must be the same as the connection size of the indoor unit.

Indoor unit capacity

index

15~50 12.7 6.4

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.

Piping outer diameter size (mm)

Gas pipe Liquid 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.

In case of heat pump system

Indoor unit capacity

index

<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

Installer and user reference guide

Piping outer diameter size (mm)

Gas pipe Liquid pipe

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)

8 9.5 → 12.7

12+14 12.7 → 15.9

18~22 15.9 → 19.1

26~34 19.1 → 22.2

36~42

F: Piping between refrigerant branch kit and BP unit

Heat pump system in case of single outdoor 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).

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5 Preparation

Total capacity index

of connected indoor

units

Piping outer diameter size (mm)

Gas pipe Liquid pipe

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]

G: Piping between BP unit and RA DX indoor unit

Heat pump system in case of single outdoor unit

Only in case RADX indoor units are connected.

Indoor unit capacity

index

Piping outer diameter size (mm)

Gas pipe Liquid pipe

20, 25, 30 9.5 6.4

50 12.7

60 9.5

71 15.9

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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).

Outdoor unit

capacity type (HP)

8~10 KHRQ22M29T9 KHRQ23M29T9

12~22 KHRQ22M64T KHRQ23M64T

24~42 KHRQ22M75T 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

<200 KHRQ22M20T KHRQ23M20T

200≤x<290 KHRQ22M29T9 KHRQ23M29T9

290≤x<640 KHRQ22M64T KHRQ23M64T

≥640 KHRQ22M75T 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

<200 KHRQ22M29H KHRQ23M29H

200≤x<290

290≤x<640 KHRQ22M64H

≥640 KHRQ22M75H KHRQ23M75H

(a) If the pipe size above the refnet header is Ø34.9mm or

more, KHRQ22M75H is required.

INFORMATION

Maximum 8 branches can be connected to a header.

2 pipes 3 pipes

(a)

KHRQ23M64H

(a)

▪ 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

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.

Definitions

Term Definition

Actual piping length Pipe length between outdoor

units

Equivalent piping length

Pipe length between outdoor units, including the equivalent length of the piping accessories

Total piping length Total piping length, from the outdoor to all

indoor units

(a) If the system is a multi outdoor installation, re-read "the first

outdoor unit branch as seen from the indoor unit".

Equivalent length of the piping accessories

Accessory Equivalent length

Refnet joint 0.5m

Refnet header 1m

Single BS1Q100~160 4m

Single BS1Q25 6m

Multi BS4~16Q14 4m

Allowable height difference

Term Definition Distance

Actual piping length Pipe length between

Equivalent piping

length

(b)

Total piping length Total piping length from the

(a)

outdoor

Pipe length between outdoor

outdoor

and indoor units

(a)

and indoor units

(a)

to all indoor units

H1 Height difference between

outdoor and indoor units

H2 Height difference between

indoor units

H3 Height difference between

outdoor units

H4 Height difference between

outdoor unit and BP unit.

H5 Height difference between BP

units

H6 Height difference between BP

unit and RA DX indoor unit

H7 Height difference between

EKEXV-kits and AHU units

(a)

and indoor

(a)

and indoor

165m

190m

300m

50/40m

15m

30m

5m

40m

15m

5m

(b)

(c)

RWEYQ8~14T9Y1B VRV IV water-cooled system air conditioner 4P452191-1A – 2018.03

Installer and user reference guide

5 Preparation

(a) If the system capacity is a multi outdoor installation, re-read

"the first outdoor branch as seen from the indoor unit".

(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.

only, the height difference between indoor units (H2) can be increased to 30m. In all other cases, the H2 is limited to 15m.

If Then

The outdoor unit is positioned higher than the indoor units

The outdoor unit is positioned lower than the indoor units

▪ Minimum connection ratio: 80%

▪ Size up the liquid piping (refer to

"5.3.2 To select the piping size" on page13 for more information)

▪ Activate the outdoor unit setting. Refer to

the service manual for more information.

▪ Minimum connection ratio 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%

▪ Size up the liquid piping (refer to

"5.3.2 To select the piping size" on page13 for more information)

▪ Activate the outdoor unit setting. Refer to

the service manual for more information.

▪ No technical cooling

Pipe Maximum length

(actual/equivalent)

Longest pipe from the outdoor unit or the

165m/190m last multi-outdoor piping branch (1+2+6, 1+3, 1+2+5)

Longest pipe after the first branch (3, 2+6,

40m/—

2+5)

In case of a multi-outdoor setup: longest

10m/13m pipe from the outdoor unit to the last multioutdoor piping branch (4)

Total pipe length (1+2+3+5+6) 300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13.

Connection with VRV DX indoor units and Hydrobox units

(a)

5.3.5 Single outdoor units and standard multioutdoor-unit combinations

In case of heat pump system

Connection with VRV DX indoor units and air handling units

a Outdoor unit b VRV DX indoor unit c EKEXV kit d Air handling unit

Installer and user reference guide

a Outdoor unit b VRV DX indoor unit c LT Hydrobox unit

Pipe Maximum length

(actual/equivalent)

Longest pipe from the outdoor unit or the

120m/140m last multi-outdoor piping branch (1+2+6, 1+3, 1+2+5)

Longest pipe after the first branch (3, 2+6,

40m/—

2+5)

In case of a multi-outdoor setup: longest

10m/13m pipe from the outdoor unit to the last multioutdoor piping branch (4)

Total pipe length (1+2+3+5+6) 300m/—

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5 Preparation

H2 H4

5 7

1 2

Connection with only VRV DX and RA DX indoor units

a Outdoor unit

b VRV DX indoor unit

c RADX indoor unit

d BP box

(1)

In case of heat recovery system

Connection with VRV DX indoor units and air handling units

(1) This connection is only allowed on a single outdoor unit

installation.

Pipe Maximum length

(actual/equivalent)

Longest pipe from the outdoor unit or the

100m/120m last multi-outdoor piping branch (1+2, 1+3+4, 1+3+5+6, 1+3+5+7)

Longest pipe after the first branch (3+4,

40m/—

3+5+6, 3+5+7)

Total pipe length (1+2+3+4+5+6+7+8+9) 250m/—

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 the outdoor unit and first refrigerant branch kit must be larger than 5m (e.g., a>5m).

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) 40m/—

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

Total pipe length 300m/—

If the piping length between the first branch and BP unit or VRV DX indoor unit is larger than 20m, it is necessary to increase the gas

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)

165m/190m

(a)

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13.

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, then the latter also requires a liquid piping and gas piping size up.

RWEYQ8~14T9Y1B VRV IV water-cooled system air conditioner 4P452191-1A – 2018.03

Installer and user reference guide

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