Daikin VRV IV+ User guide

Installer and user reference guide
VRV IV+ heat pump
RYYQ8U7Y1B*
RYYQ10U7Y1B*
RYYQ12U7Y1B*
RYYQ14U7Y1B*
RYYQ16U7Y1B*
RYYQ18U7Y1B*
RYYQ20U7Y1B*
RYMQ8U7Y1B*
RYMQ10U7Y1B*
RYMQ12U7Y1B*
RYMQ14U7Y1B*
RYMQ16U7Y1B*
RYMQ18U7Y1B*
RYMQ20U7Y1B*
RXYQ8U7Y1B*
RXYQ10U7Y1B*
RXYQ12U7Y1B*
RXYQ14U7Y1B*
RXYQ16U7Y1B*
RXYQ18U7Y1B*
RXYQ20U7Y1B*

Table of contents
Installer and user reference guide
2
RYYQ+RYMQ+RXYQ8~20U7Y1B
VRV IV+ heat pump
4P546228-1A – 2019.10
Table of contents
1 General safety precautions 6
1.1 About the documentation .............................................................................................................................................. 6
1.1.1 Meaning of warnings and symbols ................................................................................................................ 6
1.2 For the user..................................................................................................................................................................... 7
1.3 For the installer............................................................................................................................................................... 8
1.3.1 General ........................................................................................................................................................... 8
1.3.2 Installation site ............................................................................................................................................... 9
1.3.3 Refrigerant...................................................................................................................................................... 9
1.3.4 Brine................................................................................................................................................................ 11
1.3.5 Water .............................................................................................................................................................. 11
1.3.6 Electrical ......................................................................................................................................................... 11
2 About the documentation 14
2.1 About this document ...................................................................................................................................................... 14
For the installer 14
3 About the box 16
3.1 Overview: About the box ................................................................................................................................................ 16
3.2 To unpack the outdoor unit............................................................................................................................................ 17
3.3 To remove the accessories from the outdoor unit ........................................................................................................ 17
3.4 Accessory pipes: Diameters............................................................................................................................................ 18
3.5 To remove the transportation stay ................................................................................................................................ 18
4 About the units and options 20
4.1 Overview: About the units and options.......................................................................................................................... 20
4.2 Identification label: Outdoor unit................................................................................................................................... 20
4.3 About the outdoor unit................................................................................................................................................... 21
4.4 System layout.................................................................................................................................................................. 21
4.5 Combining units and options.......................................................................................................................................... 22
4.5.1 About combining units and options............................................................................................................... 22
4.5.2 Possible combinations of indoor units........................................................................................................... 22
4.5.3 Possible combinations of outdoor units ........................................................................................................ 22
4.5.4 Possible options for the outdoor unit............................................................................................................ 23
5 Preparation 25
5.1 Overview: Preparation.................................................................................................................................................... 25
5.2 Preparing the installation site......................................................................................................................................... 25
5.2.1 Installation site requirements of the outdoor unit........................................................................................ 25
5.2.2 Additional installation site requirements of the outdoor unit in cold climates............................................ 27
5.2.3 Securing safety against refrigerant leaks ....................................................................................................... 28
5.3 Preparing refrigerant piping ........................................................................................................................................... 30
5.3.1 Refrigerant piping requirements.................................................................................................................... 30
5.3.2 To select the piping size ................................................................................................................................. 31
5.3.3 To select refrigerant branch kits .................................................................................................................... 33
5.3.4 About the piping length.................................................................................................................................. 35
5.3.5 Piping length: VRV DX only............................................................................................................................. 35
5.3.6 Piping length: VRV DX and Hydrobox............................................................................................................. 39
5.3.7 Piping length: VRV DX and RA DX................................................................................................................... 40
5.3.8 Multiple outdoor units: Possible layouts ....................................................................................................... 41
5.4 Preparing electrical wiring .............................................................................................................................................. 43
5.4.1 About preparing electrical wiring................................................................................................................... 43
5.4.2 About electrical compliance........................................................................................................................... 44
5.4.3 Safety device requirements ........................................................................................................................... 45
6 Installation 48
6.1 Overview: Installation ..................................................................................................................................................... 48
6.2 Opening the units ........................................................................................................................................................... 48
6.2.1 To open the outdoor unit............................................................................................................................... 48
6.2.2 To open the electrical component box of the outdoor unit ......................................................................... 49
6.3 Mounting the outdoor unit............................................................................................................................................. 49
6.3.1 To provide the installation structure ............................................................................................................. 49
6.4 Connecting the refrigerant piping .................................................................................................................................. 51
6.4.1 Precautions when connecting the refrigerant piping.................................................................................... 51
6.4.2 About connecting the refrigerant piping ....................................................................................................... 51

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VRV IV+ heat pump
4P546228-1A – 2019.10
6.4.3 To route the refrigerant piping ...................................................................................................................... 52
6.4.4 To connect the refrigerant piping to the outdoor unit ................................................................................. 52
6.4.5 To connect the multi connection piping kit................................................................................................... 53
6.4.6 Multiple outdoor units: Knockout holes ........................................................................................................ 54
6.4.7 To connect the refrigerant branching kit....................................................................................................... 54
6.4.8 To protect against contamination.................................................................................................................. 54
6.4.9 To braze the pipe end..................................................................................................................................... 55
6.4.10 Using the stop valve and service port............................................................................................................ 56
6.4.11 To remove the pinched pipes......................................................................................................................... 57
6.5 Checking the refrigerant piping...................................................................................................................................... 59
6.5.1 About checking the refrigerant piping........................................................................................................... 59
6.5.2 Checking refrigerant piping: General guidelines ........................................................................................... 60
6.5.3 Checking refrigerant piping: Setup ................................................................................................................ 60
6.5.4 To perform a leak test .................................................................................................................................... 61
6.5.5 To perform vacuum drying............................................................................................................................. 61
6.6 To insulate the refrigerant piping................................................................................................................................... 62
6.7 Charging refrigerant........................................................................................................................................................ 63
6.7.1 Precautions when charging refrigerant ......................................................................................................... 63
6.7.2 About charging refrigerant............................................................................................................................. 64
6.7.3 To determine the additional refrigerant amount.......................................................................................... 64
6.7.4 To charge refrigerant: Flow chart .................................................................................................................. 67
6.7.5 To charge refrigerant...................................................................................................................................... 69
6.7.6 Step 6a: To automatically charge refrigerant ................................................................................................ 72
6.7.7 Step 6b: To manually charge refrigerant ....................................................................................................... 73
6.7.8 Error codes when charging refrigerant.......................................................................................................... 74
6.7.9 Checks after charging refrigerant .................................................................................................................. 75
6.7.10 To fix the fluorinated greenhouse gases label............................................................................................... 75
6.8 Connecting the electrical wiring..................................................................................................................................... 76
6.8.1 Precautions when connecting the electrical wiring....................................................................................... 76
6.8.2 Field wiring: Overview .................................................................................................................................... 77
6.8.3 About the electrical wiring ............................................................................................................................. 78
6.8.4 Guidelines when knocking out knockout holes ............................................................................................. 79
6.8.5 To route and fix the transmission wiring ....................................................................................................... 79
6.8.6 To connect the transmission wiring............................................................................................................... 80
6.8.7 To finish the transmission wiring ................................................................................................................... 81
6.8.8 To route and fix the power supply................................................................................................................. 81
6.8.9 To connect the power supply......................................................................................................................... 82
7 Configuration 84
7.1 Overview: Configuration................................................................................................................................................. 84
7.2 Making field settings....................................................................................................................................................... 84
7.2.1 About making field settings............................................................................................................................ 84
7.2.2 Field setting components............................................................................................................................... 85
7.2.3 To access the field setting components......................................................................................................... 86
7.2.4 To access mode 1 or 2.................................................................................................................................... 86
7.2.5 To use mode 1 ................................................................................................................................................ 87
7.2.6 To use mode 2 ................................................................................................................................................ 88
7.2.7 Mode 1: Monitoring settings ......................................................................................................................... 89
7.2.8 Mode 2: Field settings .................................................................................................................................... 92
7.2.9 To connect the PC configurator to the outdoor unit..................................................................................... 99
7.3 Energy saving and optimum operation .......................................................................................................................... 99
7.3.1 Available main operation methods................................................................................................................ 99
7.3.2 Available comfort settings.............................................................................................................................. 100
7.3.3 Example: Automatic mode during cooling..................................................................................................... 103
7.3.4 Example: Automatic mode during heating .................................................................................................... 104
7.4 Using the leak detection function .................................................................................................................................. 105
7.4.1 About automatic leak detection .................................................................................................................... 105
7.4.2 To manually perform a leak detection........................................................................................................... 105
8 Commissioning 108
8.1 Overview: Commissioning .............................................................................................................................................. 108
8.2 Precautions when commissioning.................................................................................................................................. 108
8.3 Checklist before commissioning..................................................................................................................................... 109
8.4 About the test run........................................................................................................................................................... 110
8.5 To perform a test run...................................................................................................................................................... 111
8.6 Correcting after abnormal completion of the test run .................................................................................................. 112
8.7 Operating the unit........................................................................................................................................................... 112
9 Maintenance and service 113
9.1 Overview: Maintenance and service .............................................................................................................................. 113

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VRV IV+ heat pump
4P546228-1A – 2019.10
9.2 Maintenance safety precautions.................................................................................................................................... 113
9.2.1 To prevent electrical hazards ......................................................................................................................... 113
9.3 About service mode operation....................................................................................................................................... 114
9.3.1 To use vacuum mode ..................................................................................................................................... 114
9.3.2 To recover refrigerant .................................................................................................................................... 114
10 Troubleshooting 116
10.1 Overview: Troubleshooting ............................................................................................................................................ 116
10.2 Solving problems based on error codes ......................................................................................................................... 116
10.3 Error codes: Overview .................................................................................................................................................... 116
11 Disposal 122
12 Technical data 123
12.1 Overview: Technical data................................................................................................................................................ 123
12.2 Service space: Outdoor unit ........................................................................................................................................... 123
12.3 Piping diagram: Outdoor unit ......................................................................................................................................... 126
12.4 Wiring diagram: Outdoor unit ........................................................................................................................................ 131
For the user 136
13 About the system 137
13.1 System layout.................................................................................................................................................................. 137
14 User interface 139
15 Before operation 140
16 Operation 141
16.1 Operation range.............................................................................................................................................................. 141
16.2 Operating the system ..................................................................................................................................................... 141
16.2.1 About operating the system........................................................................................................................... 141
16.2.2 About cooling, heating, fan only, and automatic operation ......................................................................... 141
16.2.3 About the heating operation.......................................................................................................................... 141
16.2.4 To operate the system (WITHOUT cool/heat changeover remote control switch)...................................... 142
16.2.5 To operate the system (WITH cool/heat changeover remote control switch)............................................. 143
16.3 Using the dry program .................................................................................................................................................... 143
16.3.1 About the dry program................................................................................................................................... 143
16.3.2 To use the dry program (WITHOUT cool/heat changeover remote control switch) .................................... 144
16.3.3 To use the dry program (WITH cool/heat changeover remote control switch) ........................................... 144
16.4 Adjusting the air flow direction ...................................................................................................................................... 145
16.4.1 About the air flow flap.................................................................................................................................... 145
16.5 Setting the master user interface................................................................................................................................... 146
16.5.1 About setting the master user interface........................................................................................................ 146
16.5.2 To designate the master user interface (VRV DX and Hydrobox) ................................................................. 146
16.5.3 To designate the master user interface (VRV DX and RA DX) ....................................................................... 147
16.6 About control systems .................................................................................................................................................... 147
17 Energy saving and optimum operation 148
17.1 Available main operation methods ................................................................................................................................ 148
17.2 Available comfort settings .............................................................................................................................................. 149
18 Maintenance and service 150
18.1 Maintenance after a long stop period............................................................................................................................ 150
18.2 Maintenance before a long stop period......................................................................................................................... 150
18.3 About the refrigerant...................................................................................................................................................... 151
18.4 After-sales service and warranty .................................................................................................................................... 151
18.4.1 Warranty period ............................................................................................................................................. 151
18.4.2 Recommended maintenance and inspection................................................................................................ 151
18.4.3 Recommended maintenance and inspection cycles ..................................................................................... 152
18.4.4 Shortened maintenance and replacement cycles ......................................................................................... 153
19 Troubleshooting 154
19.1 Error codes: Overview .................................................................................................................................................... 155
19.2 Symptoms that are NOT system malfunctions............................................................................................................... 157
19.2.1 Symptom: The system does not operate....................................................................................................... 157
19.2.2 Symptom: Cool/Heat cannot be changed over ............................................................................................. 158
19.2.3 Symptom: Fan operation is possible, but cooling and heating do not work ................................................ 158
19.2.4 Symptom: The fan speed does not correspond to the setting...................................................................... 158
19.2.5 Symptom: The fan direction does not correspond to the setting................................................................. 158
19.2.6 Symptom: White mist comes out of a unit (Indoor unit) .............................................................................. 158

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Installer and user reference guide
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VRV IV+ heat pump
4P546228-1A – 2019.10
19.2.7 Symptom: White mist comes out of a unit (Indoor unit, outdoor unit)........................................................ 158
19.2.8 Symptom: The user interface reads "U4" or "U5" and stops, but then restarts after a few minutes.......... 158
19.2.9 Symptom: Noise of air conditioners (Indoor unit)......................................................................................... 159
19.2.10 Symptom: Noise of air conditioners (Indoor unit, outdoor unit) .................................................................. 159
19.2.11 Symptom: Noise of air conditioners (Outdoor unit)...................................................................................... 159
19.2.12 Symptom: Dust comes out of the unit........................................................................................................... 159
19.2.13 Symptom: The units can give off odours ....................................................................................................... 159
19.2.14 Symptom: The outdoor unit fan does not spin.............................................................................................. 159
19.2.15 Symptom: The display shows "88"................................................................................................................. 159
19.2.16 Symptom: The compressor in the outdoor unit does not stop after a short heating operation ................. 160
19.2.17 Symptom: The inside of an outdoor unit is warm even when the unit has stopped.................................... 160
19.2.18 Symptom: Hot air can be felt when the indoor unit is stopped.................................................................... 160
20 Relocation 161
21 Disposal 162
22 Technical data 163
22.1 Information requirements for Eco Design...................................................................................................................... 163
23 Glossary 164

1 | General safety precautions
Installer and user reference guide
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RYYQ+RYMQ+RXYQ8~20U7Y1B
VRV IV+ heat pump
4P546228-1A – 2019.10
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 in 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.
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.

1 | General safety precautions
Installer and user reference guide
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RYYQ+RYMQ+RXYQ8~20U7Y1B
VRV IV+ heat pump
4P546228-1A – 2019.10
Symbol Explanation
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.
CAUTION
▪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 | General safety precautions
Installer and user reference guide
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RYYQ+RYMQ+RXYQ8~20U7Y1B
VRV IV+ heat pump
4P546228-1A – 2019.10
1.3 For the installer
1.3.1 General
If you are NOT sure how to install or operate the unit, contact your dealer.
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
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.
WARNING
Provide adequate measures to prevent that the unit can be used as a shelter by small
animals. Small animals that make contact with electrical parts can cause
malfunctions, smoke or fire.
CAUTION
Do NOT touch the air inlet or aluminium fins of the unit.
CAUTION
▪Do NOT place any objects or equipment on top of the unit.
▪Do NOT sit, climb or stand on the unit.
NOTICE
Works executed on the outdoor unit are best done under dry weather conditions to
avoid water ingress.
In accordance with the applicable legislation, it might be necessary to provide a
logbook with the product containing at least: information on maintenance, repair
work, results of tests, stand-by periods,…
Also, at least, following information MUST be provided at an accessible place at the
product:

1 | General safety precautions
Installer and user reference guide
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RYYQ+RYMQ+RXYQ8~20U7Y1B
VRV IV+ heat pump
4P546228-1A – 2019.10
▪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).
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.

1 | General safety precautions
Installer and user reference guide
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RYYQ+RYMQ+RXYQ8~20U7Y1B
VRV IV+ heat pump
4P546228-1A – 2019.10
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.
Possible consequence: Self-combustion and explosion of the compressor because of
oxygen going into the operating compressor.
▪In case recharge is required, see the nameplate of the unit. It states the type of
refrigerant and necessary amount.
▪The unit is factory charged with refrigerant and depending on pipe sizes and pipe
lengths some systems require additional charging of refrigerant.
▪Only use tools exclusively for the refrigerant type used in the system, this to
ensure pressure resistance and prevent foreign materials from entering into the
system.
▪Charge the liquid refrigerant as follows:
If Then
A siphon tube is present
(i.e., the cylinder is marked with "Liquid
filling siphon attached")
Charge with the cylinder upright.
A siphon tube is NOT present Charge with the cylinder upside down.
▪Open refrigerant cylinders slowly.

1 | General safety precautions
Installer and user reference guide
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RYYQ+RYMQ+RXYQ8~20U7Y1B
VRV IV+ heat pump
4P546228-1A – 2019.10
▪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.
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.

1 | General safety precautions
Installer and user reference guide
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4P546228-1A – 2019.10
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 m away from televisions or radios to prevent
interference. Depending on the radio waves, a distance of 1 m may not be
sufficient.

1 | General safety precautions
Installer and user reference guide
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4P546228-1A – 2019.10
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
Installer and user reference guide
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RYYQ+RYMQ+RXYQ8~20U7Y1B
VRV IV+ heat pump
4P546228-1A – 2019.10
2 About the documentation
2.1 About this document
Target audience
Authorised installers + end users
INFORMATION
This appliance is intended to be used by expert or trained users in shops, in light
industry and on farms, or for commercial use by lay persons.
Documentation set
This document is part of a documentation set. The complete set consists of:
▪General safety precautions:
-Safety instructions that you must read before installing
-Format: Paper (in the box of the outdoor unit)
▪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 Business Portal
(authentication required).

2 | About the documentation
Installer and user reference guide
15
RYYQ+RYMQ+RXYQ8~20U7Y1B
VRV IV+ heat pump
4P546228-1A – 2019.10
For the installer

3 | About the box
Installer and user reference guide
16
RYYQ+RYMQ+RXYQ8~20U7Y1B
VRV IV+ heat pump
4P546228-1A – 2019.10
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 claims agent of the carrier.
▪Bring the packed unit as close as possible to its final installation position to
prevent damage during transport.
▪When handling the unit, take into account the following:
Fragile, handle the unit with care.
Keep the unit upright in order to avoid 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.
d
d
b
b
d
c
a
c
aPackaging material
bBelt sling
cOpening
dProtector
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 | About the box
Installer and user reference guide
17
RYYQ+RYMQ+RXYQ8~20U7Y1B
VRV IV+ heat pump
4P546228-1A – 2019.10
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.
8~12 HP
14~20 HP
3.3 To remove the accessories from the outdoor unit
14~20 HP8~12 HP
Make sure that all accessories are available in the unit.
a d
1× 1×
e
1×
3P328191-1
BESURE TO FILL OUTTHE BLANKS, WH ICHARE NEEDED FOR AFTER-SALE SERVICES.
REQUESTFOR THE INDICATION OF INSTALLATIONINFORMATION
1.RECORD OF INDOOR UNIT MODELAND INSTALLATION SITE
2.RECORD FOR SETTINGS (CONTENTS SEE INSTALLATIONMANUAL)
SETTING
40
30
10
2019
9
29
3938
28
8
1817
7
27
3736
26
6
1615
5
25
3534
23 24
4321
INSTALLATION
MODELNAME
No.
12 13 14
504948474645
6059585756
64636261
11
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.RECORDOF INSTALLATION DATE
6.AFTEREQUIPPING, PLEASE PUT IT ON THE BACK SIDE OF THE FRONT PLATE.
DAY MONTH YEAR 4. MODEL NAME 5.MANUFACTURINGNUMBER
VALUE REMARK DATE SETTING VALUE REMARK DATE
3P328192-1
3.FOR DETAILSCONCERNING PIPING SELECTION AND CALCULATION OR HOW TO OPERATE THE LEAK DETECTION FUNCTION, PLEASE REFERTO THE INSTALLATION MANUAL.
2.RECORD OF ADDITIONALREFRIGERANT CHARGE AMOUNT AND RESULT OF LEAK CHECK OPERATION
REQUESTFOR THE INDICATION OF ADDITIONALREFRIGERANT CHARGING AND LEAK DETECTION OPERATION RESULT
BESURE TO FILLOUT THE BLANKS, WHICH ARE NEEDED FOR AFTER-SALE SERVICES.
1.CALCULATIONOF ADDITIONAL REFRIGERANT CHARGING AMOUNT
4.AFTER FILLING INTHIS TABLE, PLEASE PUT IT ON THE SWITCH BOX COVER.
(m)x0.18(m)x0.37
kg
OUTDOOR
UNIT
(m)x0.26
(m)x0.12 (m)x0.059 (m)x0.022
ADDITIONALCHARGING
AMOUNT
TOTALLENGTHOFLIQUID
PIPESIZEO22.2 x 0.37
TOTALLENGTHOFLIQUID
PIPESIZEO19.1 x 0.26
TOTALLENGTHOFLIQUID
PIPESIZEO15.9 x 0.18
TOTALLENGTHOFLIQUID
PIPESIZEO12.7 x 0.12
TOTALLENGTHOFLIQUID
PIPESIZEO9.5 x 0.059
TOTALLENGTHOFLIQUID
PIPESIZEO6.4 x 0.022
105%<CR< 130%
50%<CR< 105%
50%<CR< 70%
70%<CR< 85%
85%<CR< 105%
105%<CR< 130%
8HP
Totalindoorunit
capacityconnection
ratio(CR)
10-12HP14-16HP18-20HP
2.0
1.5
1.5
1.2
1.5
1
1
0.7
1.0
0.5
0.5
0.3
0.5
0
0
0
1.0
0.5
0.5
0.5
0.5
0
0
0
Totalindoorunitcapacity
whenpipinglength <30m
Totalindoorunitcapacity
whenpipinglength >30m
kg
1.3
1.1
0.9
RYYQ18-20
RYYQ14-16
RYYQ8~12
kg
ONLYFORRYYQ8~20MODELS
DATE
AMOUNT
CALCULATETHEADDITIONALREFRIGERANT CHARGINGAMOUNTBASED ON THE FORMULA BELOW BEFORECHARGING.
SHIPMENT(INDICATEDON THE MACHINE NAMEPLATE)AND THE ADDITIONAL AMOUNT SHOWNAS FOLLOWS :
WHENRE-CHARGINGTOTALAMOUNT OF REFRIGERANT , CHARGETHETOTAL OF THE AMOUNT CHARGEDAT
RESULTLEAKCHECK
DATE
AMOUNT
RESULTLEAKCHECK
DATE
AMOUNT
RESULTLEAKCHECK
DATE
AMOUNT
RESULTLEAKCHECK
c
1×
b
1×
f g
1×1×
aGeneral safety precautions

3 | About the box
Installer and user reference guide
18
RYYQ+RYMQ+RXYQ8~20U7Y1B
VRV IV+ heat pump
4P546228-1A – 2019.10
bInstallation manual and operation manual
cAdditional refrigerant charge label
dInstallation information sticker
eFluorinated greenhouse gases label
fMultilingual fluorinated greenhouse gases label
gPiping accessory bag
3.4 Accessory pipes: Diameters
Accessory pipes (mm) HP Øa Øb
Gas pipe
▪Front connection
ID Øa
ID Øb
▪Bottom connection
ID Øa
OD Øb
8 25.4 19.1
10 22.2
12 28.6
14
16
18
20
Liquid pipe
▪Front connection
ID Øb
ID Øa
▪Bottom connection
ID Øb
ID Øa
8 9.5
10
12 9.5 12.7
14 12.7
16
18 12.7 15.9
20
Equaliser pipe(a)
▪Front connection
ID Øa
ID Øb
▪Bottom connection
ID Øa
OD Øb
8 19.1
10
12 19.1 22.2
14
16
18 25.4 28.6
20
(a) Only for RYMQ models.
3.5 To remove the transportation stay
Only for 14~20 HP
NOTICE
If the unit is operated with the transportation stay attached, abnormal vibration or
noise may be generated.
The transportation stay installed over the compressor leg for protecting the unit
during transport must be removed. Proceed as shown in the figure and procedure
below.

3 | About the box
Installer and user reference guide
19
RYYQ+RYMQ+RXYQ8~20U7Y1B
VRV IV+ heat pump
4P546228-1A – 2019.10
1Slightly loosen the fixing nut (a).
2Remove the transportation stay (b) as shown in the figure below.
3Tighten the fixing nut (a) again.
1
3 (12.3 N·m)
2
1
3 (12.3 N·m)
2a
b

4 | About the units and options
Installer and user reference guide
20
RYYQ+RYMQ+RXYQ8~20U7Y1B
VRV IV+ heat pump
4P546228-1A – 2019.10
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
14~20 HP8~12 HP
Model identification
Example: R Y Y Q 18 U7 Y1 B [*]
Code Explanation
R Outdoor air cooled
Y Y=Heat pump (continuous heating)
X=Heat pump (no continuous heating)
Y Y=Pair module only(a)
M=Multi module only
Q Refrigerant R410A
18 Capacity class
U7 Model series
Y1 Power supply
B European market
[*] Minor model change indication
(a) For RXYQ, there is no restriction on use as multi module.