Daikin SV1A25AJV1B User manual

Installer and user reference guide
VRV 5 safety valve unit
SV1A25AJV1B
SV4A14AJV1B
SV6A14AJV1B
SV8A14AJV1B

Table of contents
Installer and user reference guide
2
SV1A25AJV1B+SV4~8A14AJV1B
VRV 5 safety valve unit
4P749917-1 – 2023.09
Table of contents
1 About this document 5
1.1 Meaning of warnings and symbols................................................................................................................................. 5
2 General safety precautions 7
2.1 For the installer............................................................................................................................................................... 7
2.1.1 General ........................................................................................................................................................... 7
2.1.2 Installation site ............................................................................................................................................... 8
2.1.3 Refrigerant — in case of R410A or R32.......................................................................................................... 8
2.1.4 Electrical ......................................................................................................................................................... 10
3 Specific installer safety instructions 13
3.1 Instructions for equipment using R32 refrigerant ......................................................................................................... 17
For the user 19
4 User safety instructions 20
4.1 General............................................................................................................................................................................ 20
4.2 Instructions for safe operation ....................................................................................................................................... 21
5 About the system 25
5.1 System layout.................................................................................................................................................................. 25
6 Before operation 27
7 Maintenance and service 28
7.1 Precautions for maintenance and service...................................................................................................................... 28
7.2 About the refrigerant...................................................................................................................................................... 28
7.2.1 About the refrigerant leakage sensor ............................................................................................................ 29
8 Troubleshooting 30
8.1 Symptoms that are NOT system malfunctions............................................................................................................... 30
8.1.1 Symptom: noise.............................................................................................................................................. 31
9 Relocation 32
10 Disposal 33
For the installer 34
11 About the box 35
11.1 To handle the unit........................................................................................................................................................... 35
11.2 To unpack the unit .......................................................................................................................................................... 36
11.3 To remove the accessories ............................................................................................................................................. 39
12 About the unit and options 41
12.1 Identification ................................................................................................................................................................... 41
12.1.1 Identification label: SV unit ............................................................................................................................ 41
12.2 About the operation range ............................................................................................................................................. 41
12.3 System layout.................................................................................................................................................................. 41
12.4 Combining units and options.......................................................................................................................................... 42
12.4.1 Possible options for the SV unit ..................................................................................................................... 42
13 Special requirements for R32 units 44
13.1 Installation space requirements ..................................................................................................................................... 44
13.2 System layout requirements........................................................................................................................................... 44
13.3 To determine the required safety measures ................................................................................................................. 45
13.3.1 Overview: flowchart ....................................................................................................................................... 48
13.4 Safety measures.............................................................................................................................................................. 49
13.4.1 No safety measure.......................................................................................................................................... 49
13.4.2 External alarm................................................................................................................................................. 49
13.4.3 Natural ventilation.......................................................................................................................................... 50
13.4.4 Ventilated enclosure ...................................................................................................................................... 52
13.4.5 Overview: flowchart ....................................................................................................................................... 59
13.5 Combinations of ventilated enclosure configurations................................................................................................... 60
13.6 Combinations of safety measures .................................................................................................................................. 61

Table of contents
Installer and user reference guide
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VRV 5 safety valve unit
4P749917-1 – 2023.09
14 Unit installation 63
14.1 Preparing the installation site......................................................................................................................................... 63
14.1.1 Installation site requirements of the unit ...................................................................................................... 63
14.2 Possible configurations ................................................................................................................................................... 66
14.3 Opening and closing the unit.......................................................................................................................................... 68
14.3.1 To open the unit ............................................................................................................................................. 68
14.3.2 To close the unit ............................................................................................................................................. 68
14.4 Mounting the unit........................................................................................................................................................... 68
14.4.1 To mount the unit........................................................................................................................................... 68
14.4.2 To connect the drain piping ........................................................................................................................... 70
14.4.3 To install the drain piping............................................................................................................................... 71
14.5 Installing the ventilation ducting .................................................................................................................................... 72
14.5.1 To install the ducting ...................................................................................................................................... 72
14.5.2 To install the duct closing plate...................................................................................................................... 73
14.5.3 To switch the air in- and outlet side............................................................................................................... 74
15 Piping installation 80
15.1 Installation limitations .................................................................................................................................................... 81
15.1.1 Piping installation limitation........................................................................................................................... 82
15.2 Preparing refrigerant piping ........................................................................................................................................... 83
15.2.1 Refrigerant piping requirements.................................................................................................................... 83
15.2.2 Refrigerant piping material ............................................................................................................................ 83
15.2.3 Refrigerant piping insulation .......................................................................................................................... 83
15.3 Connecting the refrigerant piping .................................................................................................................................. 84
15.3.1 To connect the refrigerant piping .................................................................................................................. 84
15.3.2 To braze the pipe end..................................................................................................................................... 85
15.3.3 Joining branch pipe ports ............................................................................................................................... 86
15.4 To insulate the refrigerant piping................................................................................................................................... 86
16 Electrical installation 88
16.1 About connecting the electrical wiring .......................................................................................................................... 88
16.1.1 Precautions when connecting the electrical wiring....................................................................................... 88
16.1.2 Specifications of standard wiring components.............................................................................................. 89
16.1.3 Guidelines when connecting the electrical wiring......................................................................................... 91
16.2 To connect the electrical wiring ..................................................................................................................................... 93
16.3 To finish the electrical wiring.......................................................................................................................................... 96
16.4 To set the DIP switches................................................................................................................................................... 96
16.5 To connect the external outputs .................................................................................................................................... 98
17 Configuration 100
17.1 Making field settings....................................................................................................................................................... 100
17.1.1 About making field settings............................................................................................................................ 100
17.1.2 To access the field setting components......................................................................................................... 100
17.1.3 Field setting components ............................................................................................................................... 100
17.1.4 To access mode 1 or 2 .................................................................................................................................... 101
17.1.5 To use mode 1 ................................................................................................................................................ 102
17.1.6 To use mode 2 ................................................................................................................................................ 103
17.1.7 Mode 1: monitoring settings.......................................................................................................................... 104
17.1.8 Mode 2: field settings..................................................................................................................................... 104
17.1.9 Mode 2: default field settings ........................................................................................................................ 108
18 Commissioning 109
18.1 Precautions when commissioning .................................................................................................................................. 109
18.2 Checklist before commissioning..................................................................................................................................... 109
18.3 SV unit test run ............................................................................................................................................................... 110
18.3.1 About the SV unit test run.............................................................................................................................. 110
18.3.2 About airflow requirements........................................................................................................................... 111
18.3.3 About measuring the airflow rate .................................................................................................................. 112
18.3.4 To perform a SV unit test run......................................................................................................................... 113
18.3.5 Troubleshooting during a SV unit test run..................................................................................................... 114
18.4 System test run ............................................................................................................................................................... 115
19 Hand-over to the user 116
20 Maintenance and service 117
20.1 Before the maintenance and service of the SV unit ...................................................................................................... 117
20.2 SV unit maintenance and service label........................................................................................................................... 117
21 Troubleshooting 118
21.1 Solving problems based on error codes ......................................................................................................................... 118
21.1.1 Prerequisites: Troubleshooting ...................................................................................................................... 118

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Installer and user reference guide
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SV1A25AJV1B+SV4~8A14AJV1B
VRV 5 safety valve unit
4P749917-1 – 2023.09
21.1.2 Error codes: Overview .................................................................................................................................... 118
22 Disposal 119
23 Technical data 120
23.1 Wiring diagram................................................................................................................................................................ 120
24 Glossary 124

1 | About this document
Installer and user reference guide
5
SV1A25AJV1B+SV4~8A14AJV1B
VRV 5 safety valve unit
4P749917-1 – 2023.09
1 About this document
WARNING
Make sure installation, servicing, maintenance, repair and applied materials follow
the instructions from Daikin (including all documents listed in “Documentation set”)
and, in addition, comply with applicable legislation and are performed by qualified
persons only. In Europe and areas where IEC standards apply, EN/IEC 60335-2-40 is
the applicable standard.
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 and household 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 SV unit)
▪SV unit installation and operation manual:
-Installation and operation instructions
-Format: Paper (in the box of the SV 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 https://www.daikin.eu. Use the search function to
find your model.
The latest revision of the supplied documentation is published on the regional
Daikin website and is available via your dealer.
The original instructions are written in English. All other languages are translations
of the original instructions.
Technical engineering data
▪A subset of the latest technical data is available on the regional Daikin website
(publicly accessible).
▪The full set of the latest technical data is available on the Daikin Business Portal
(authentication required).
1.1 Meaning of warnings and symbols
DANGER
Indicates a situation that results in death or serious injury.

1 | About this document
Installer and user reference guide
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VRV 5 safety valve unit
4P749917-1 – 2023.09
DANGER: RISK OF ELECTROCUTION
Indicates a situation that could result in electrocution.
DANGER: RISK OF BURNING/SCALDING
Indicates a situation that could result in burning/scalding 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
WARNING: MILDLY FLAMMABLE MATERIAL
The refrigerant inside this unit is mildly flammable.
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.
Symbols used on the unit:
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.
The unit contains rotating parts. Be careful when servicing or
inspecting the unit.
Symbols used in the documentation:
Symbol Explanation
Indicates a figure title or a reference to it.
Example: " 1–3 Figure title" means "Figure 3 in chapter 1".
Indicates a table title or a reference to it.
Example: " 1–3 Table title" means "Table 3 in chapter 1".

2 | General safety precautions
Installer and user reference guide
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SV1A25AJV1B+SV4~8A14AJV1B
VRV 5 safety valve unit
4P749917-1 – 2023.09
2 General safety precautions
In this chapter
2.1 For the installer....................................................................................................................................................................... 7
2.1.1 General ................................................................................................................................................................... 7
2.1.2 Installation site ....................................................................................................................................................... 8
2.1.3 Refrigerant — in case of R410A or R32 ................................................................................................................. 8
2.1.4 Electrical ................................................................................................................................................................. 10
2.1 For the installer
2.1.1 General
If you are NOT sure how to install or operate the unit, contact your dealer.
DANGER: RISK OF BURNING/SCALDING
▪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
electrical shock, short-circuit, leaks, fire or other damage to the equipment. ONLY
use accessories, optional equipment and spare parts made or approved by Daikin
unless otherwise specified.
WARNING
Make sure installation, testing and applied materials comply with applicable
legislation (on top of the instructions described in the Daikin documentation).
WARNING
Tear apart and throw away plastic packaging bags so that nobody, especially NOT
children, can play with them. Possible consequence: 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
Wear adequate personal protective equipment (protective gloves, safety glasses,…)
when installing, maintaining or servicing the system.
CAUTION
Do NOT touch the air inlet or aluminium fins of the unit.

2 | General safety precautions
Installer and user reference guide
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VRV 5 safety valve unit
4P749917-1 – 2023.09
CAUTION
▪Do NOT place any objects or equipment on top of the unit.
▪Do NOT sit, climb or stand on the unit.
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.
2.1.2 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.
2.1.3 Refrigerant — in case of R410A or R32
If applicable. See the installation manual or installer reference guide of your
application for more information.
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
During tests, NEVER pressurise the product with a pressure higher than the
maximum allowable pressure (as indicated on the nameplate of the unit).

2 | General safety precautions
Installer and user reference guide
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VRV 5 safety valve unit
4P749917-1 – 2023.09
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 might be produced if refrigerant gas comes into contact with fire.
WARNING
ALWAYS recover the refrigerant. Do NOT release them directly into the environment.
Use a vacuum pump to evacuate the installation.
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.
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.
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.
NOTICE
After all the piping has been connected, make sure there is no gas leak. Use nitrogen
to perform a gas leak detection.
▪In case recharge is required, see the nameplate or the refrigerant charge label of
the unit. It states the type of refrigerant and necessary amount.
▪Whether the unit is factory charged with refrigerant or non-charged, in both
cases you might need to charge additional refrigerant, depending on the pipe
sizes and pipe lengths of the system.
▪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.

2 | General safety precautions
Installer and user reference guide
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VRV 5 safety valve unit
4P749917-1 – 2023.09
If Then
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.
2.1.4 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 10minutes, 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.

2 | General safety precautions
Installer and user reference guide
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VRV 5 safety valve unit
4P749917-1 – 2023.09
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
electrical 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.
WARNING
▪After finishing the electrical work, confirm that each electrical component and
terminal inside the switch box is connected securely.
▪Make sure all covers are closed before starting up the unit.
CAUTION
▪When connecting the power supply: connect the earth cable first, before making
the current-carrying connections.
▪When disconnecting the power supply: disconnect the current-carrying cables
first, before separating the earth connection.
▪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.

2 | General safety precautions
Installer and user reference guide
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VRV 5 safety valve unit
4P749917-1 – 2023.09
Install power cables at least 1 meter away from televisions or radios to prevent
interference. Depending on the radio waves, a distance of 1 meter may NOT be
sufficient.
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.

3 | Specific installer safety instructions
Installer and user reference guide
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SV1A25AJV1B+SV4~8A14AJV1B
VRV 5 safety valve unit
4P749917-1 – 2023.09
3 Specific installer safety instructions
Always observe the following safety instructions and regulations.
Unit installation (see "14Unit installation"[ 4
63])
WARNING
The fixing method of the unit MUST be in accordance with the instructions from this
manual. See "14.4Mounting the unit"[468].
WARNING
Follow the service space dimensions in this manual to install the unit correctly. See
"14.1.1Installation site requirements of the unit"[463].
WARNING
In case the safety measures require a ventilated enclosure, respect the following:
▪Auxiliary devices which may be a potential ignition source shall not be installed in
the ductwork (example: hot surfaces with a temperature exceeding 700°C and
electric switching devices).
▪Only auxiliary devices (example: extraction fan) approved by the manufacturer
are used in the ductwork.
WARNING
If the ventilated enclosure safety measure is applied, the SV unit must have its own
ductwork and extraction fan. Do NOT combine this ductwork with ducting for other
purposes.
WARNING
Do NOT install operating ignition sources (example: open flames, an operating gas
appliance or an operating electric heater) in the ductwork.
WARNING
The appliance shall be stored as follows:
▪in such a way as to prevent mechanical damage.
▪in a well-ventilated room without continuously operating ignition sources
(example: open flames, an operating gas appliance or an operating electric
heater).
▪in a room with dimensions as specified in "13 Special requirements for R32
units"[444].
WARNING
Safety shut-off valves shall only be replaced with valves specified by the appliance
manufacturer.
CAUTION
Appliance NOT accessible to the general public. Install it in a secured area, protected
from easy access.
This unit is suitable for installation in a commercial, light industrial, household and
residential environment.

3 | Specific installer safety instructions
Installer and user reference guide
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VRV 5 safety valve unit
4P749917-1 – 2023.09
CAUTION
If the metal duct passes through a metal lath, wire lath or metal plate of the wooden
structure, separate the duct and wall electrically.
Refrigerant piping installation (see "15Piping installation"[ 4
80])
DANGER: RISK OF BURNING/SCALDING
WARNING
Field piping MUST be in accordance with the instructions from this manual. See
"15Piping installation"[480].
CAUTION
Piping MUST be installed according to instructions given in "15 Piping
installation" [4 80]. Only mechanical joints (e.g. braze+flare connections) that are
compliant with the latest version of ISO14903 can be used.
Low temperature solder alloys shall not be used for pipe connections.
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 might be produced if refrigerant gas comes into contact with fire.
WARNING
During tests, NEVER pressurise the product with a pressure higher than the
maximum allowable pressure (as indicated on the nameplate of the unit).
WARNING
Bent header or branch pipes can lead to refrigerant leakage. Possible consequence:
asphyxiation, suffocation and fire.
▪NEVER bend the branch and header pipes sticking out of the unit. They have to
remain straight.
▪ALWAYS support the branch and header pipes at a distance of 1m from the unit.
WARNING
Overheated insulation can start to burn. Possible consequence: fire.
▪When performing brazing work header or branch pipes, cool all other header and
branch pipes by wrapping them in wet cloths.
CAUTION
Install the refrigerant piping or components in a position where they are unlikely to
be exposed to any substance which may corrode components containing refrigerant,
unless the components are constructed of materials that are inherently resistant to
corrosion or are suitably protected against corrosion.

3 | Specific installer safety instructions
Installer and user reference guide
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CAUTION
▪Do NOT use mineral oil on flared part.
▪Do NOT reuse piping from previous installations.
▪NEVER install a drier to this unit to guarantee its lifetime. The drying material may
dissolve and damage the system.
Electrical installation (see "16Electrical installation"[ 4
88])
DANGER: RISK OF ELECTROCUTION
DANGER: RISK OF ELECTROCUTION
Before performing work on the unit, disconnect any power source connected to the
unit.
WARNING
If the supply cord is damaged, it MUST be replaced by the manufacturer, its service
agent or similarly qualified persons in order to avoid a hazard.
WARNING
Electrical wiring MUST be in accordance with the instructions from this manual. See
"16Electrical installation"[488].
WARNING
▪All wiring MUST be performed by an authorised electrician and MUST comply
with the national wiring regulation.
▪Make electrical connections to the fixed wiring.
▪All components procured on-site and all electrical construction MUST comply
with the applicable legislation.
WARNING
The electrical components shall only be replaced with parts specified by the
appliance manufacturer. Replacement with other parts may result in the ignition of
refrigerant in the event of a leak.
WARNING
The appliance MUST be installed in accordance with national wiring regulations.
WARNING
▪If the power supply has a missing or wrong N-phase, equipment might break
down.
▪Establish proper earthing. Do NOT earth the unit to a utility pipe, surge absorber,
or telephone earth. Incomplete earthing may cause electrical shocks.
▪Install the required fuses or circuit breakers.
▪Secure the electrical wiring with cable ties so that the cables do NOT come into
contact with sharp edges or piping, particularly on the high-pressure side.
▪Do NOT use taped wires, extension cords, or connections from a star system.
They can cause overheating, electrical shocks or fire.

3 | Specific installer safety instructions
Installer and user reference guide
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WARNING
ALWAYS use multicore cable for power supply cables.
WARNING
Use an all-pole disconnection type breaker with at least 3mm between the contact
point gaps that provides full disconnection under overvoltage category III.
WARNING
The appliance MUST be installed in accordance with national wiring regulations.
CAUTION
Do NOT push or place redundant cable length into the unit.
CAUTION
Be careful NOT to pinch cables between the service cover and the switchbox.
Commissioning (see "18Commissioning"[ 4
109])
WARNING
Commissioning MUST be in accordance with the instructions from this manual. See
"18Commissioning"[4109].
CAUTION
Do NOT perform the test operation while working on the indoor units.
When performing the test operation, NOT ONLY the outdoor unit, but the connected
indoor unit will operate as well. Working on an indoor unit while performing a test
operation is dangerous.
CAUTION
Do NOT insert fingers, rods or other objects into the air inlet (damper).
WARNING
Safety shut-off valves shall only be replaced with valves specified by the appliance
manufacturer.
Troubleshooting (see "21Troubleshooting"[ 4
118])
DANGER: RISK OF ELECTROCUTION
DANGER: RISK OF ELECTROCUTION
Do NOT leave the unit unattended when the service cover is removed.
DANGER: RISK OF BURNING/SCALDING

3 | Specific installer safety instructions
Installer and user reference guide
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4P749917-1 – 2023.09
WARNING
Prevent hazards due to inadvertent resetting of the thermal cut-out: power to this
appliance MUST NOT be supplied through an external switching device, such as a
timer, or connected to a circuit that is regularly turned ON and OFF by the utility.
WARNING
▪When carrying out an inspection on the switch box of the unit, ALWAYS make
sure that the unit is disconnected from the mains. Turn off the respective circuit
breaker.
▪When a safety device was activated, stop the unit and find out why the safety
device was activated before resetting it. NEVER shunt safety devices or change
their values to a value other than the factory default setting. If you are unable to
find the cause of the problem, call your dealer.
3.1 Instructions for equipment using R32 refrigerant
WARNING: MILDLY FLAMMABLE MATERIAL
The refrigerant inside this unit is mildly flammable.
WARNING
▪Do NOT pierce or burn refrigerant cycle parts.
▪Do NOT use cleaning materials or means to accelerate the defrosting process
other than those recommended by the manufacturer.
▪Be aware that the refrigerant inside the system is odourless.
WARNING
The appliance shall be stored as follows:
▪in such a way as to prevent mechanical damage.
▪in a well-ventilated room without continuously operating ignition sources
(example: open flames, an operating gas appliance or an operating electric
heater).
▪in a room with dimensions as specified in "13 Special requirements for R32
units"[444].
WARNING
Make sure installation, servicing, maintenance and repair comply with instructions
from Daikin and with applicable legislation (for example national gas regulation) and
are executed ONLY by authorised persons.
WARNING
Refrigerant sensors of the refrigerant detection system shall only be replaced with
refrigerant sensors specified by the appliance manufacturer.
WARNING
Safety shut-off valves shall not be reset until the room has been ventilated. Resetting
may result in additional flammable refrigerant to be released into the room.

3 | Specific installer safety instructions
Installer and user reference guide
18
SV1A25AJV1B+SV4~8A14AJV1B
VRV 5 safety valve unit
4P749917-1 – 2023.09
WARNING
▪Take precautions to avoid excessive vibration or pulsation to refrigeration piping.
▪Protect the protection devices, piping and fittings as much as possible against
adverse environmental effects.
▪Provide space for expansion and contraction of long runs of piping.
▪Design and install piping in refrigerating systems such as to minimise the
likelihood of hydraulic shock damaging the system.
▪Mount the indoor equipment and pipes securely and protect them to avoid
accidental rupture of equipment or pipes in case of events such as moving
furniture or reconstruction activities.
CAUTION
Do NOT use potential sources of ignition in searching for or detection of refrigerant
leaks.
NOTICE
▪Do NOT re-use joints and copper gaskets which have been used already.
▪Joints made in the installation between parts of the refrigerant system shall be
accessible for maintenance purposes.
See "13.3 To determine the required safety measures" [4 45] to check if your
system meets the R32 safety requirements.

For the user
Installer and user reference guide
19
SV1A25AJV1B+SV4~8A14AJV1B
VRV 5 safety valve unit
4P749917-1 – 2023.09
For the user

4 | User safety instructions
Installer and user reference guide
20
SV1A25AJV1B+SV4~8A14AJV1B
VRV 5 safety valve unit
4P749917-1 – 2023.09
4 User safety instructions
Always observe the following safety instructions and regulations.
In this chapter
4.1 General.................................................................................................................................................................................... 20
4.2 Instructions for safe operation............................................................................................................................................... 21
4.1 General
WARNING
If you are NOT sure how to operate the unit, contact your
installer.
WARNING
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 electrical 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.