Daikin FXFQ20BVEB User guide

Installer and user reference guide
VRV system air conditioner
FXFQ20BVEB
FXFQ25BVEB
FXFQ32BVEB
FXFQ40BVEB
FXFQ50BVEB
FXFQ63BVEB
FXFQ80BVEB
FXFQ100BVEB
FXFQ125BVEB

Table of contents
Installer and user reference guide
2
FXFQ20~125BVEB
VRV system air conditioner
4P561452-1B – 2021.07
Table of contents
1 General safety precautions 5
1.1 About the documentation .............................................................................................................................................. 5
1.1.1 Meaning of warnings and symbols ................................................................................................................ 5
1.2 For the user..................................................................................................................................................................... 6
1.3 For the installer............................................................................................................................................................... 7
1.3.1 General ........................................................................................................................................................... 7
1.3.2 Installation site ............................................................................................................................................... 8
1.3.3 Refrigerant — in case of R410A or R32.......................................................................................................... 9
1.3.4 Electrical ......................................................................................................................................................... 11
2 About the documentation 13
2.1 About this document ...................................................................................................................................................... 13
For the installer 14
3 About the box 15
3.1 Overview: About the box ................................................................................................................................................ 15
3.2 Indoor unit ...................................................................................................................................................................... 15
3.2.1 To unpack and handle the unit ...................................................................................................................... 15
3.2.2 To remove the accessories from the indoor unit .......................................................................................... 16
4 About the units and options 17
4.1 Overview: About the units and options.......................................................................................................................... 17
4.2 Identification ................................................................................................................................................................... 17
4.2.1 Identification label: Indoor unit ..................................................................................................................... 17
4.3 System layout.................................................................................................................................................................. 18
4.4 Combining units and options.......................................................................................................................................... 18
4.4.1 Possible options for the indoor unit............................................................................................................... 18
5 Preparation 19
5.1 Overview: Preparation.................................................................................................................................................... 19
5.2 Preparing the installation site......................................................................................................................................... 19
5.2.1 Installation site requirements of the indoor unit .......................................................................................... 19
5.3 Preparing refrigerant piping ........................................................................................................................................... 22
5.3.1 Refrigerant piping requirements.................................................................................................................... 22
5.3.2 Refrigerant piping insulation.......................................................................................................................... 23
5.4 Preparing electrical wiring .............................................................................................................................................. 23
5.4.1 About preparing electrical wiring................................................................................................................... 23
6 Installation 24
6.1 Overview: Installation ..................................................................................................................................................... 24
6.2 Mounting the indoor unit ............................................................................................................................................... 24
6.2.1 Precautions when mounting the indoor unit................................................................................................. 24
6.2.2 Guidelines when installing the indoor unit.................................................................................................... 25
6.2.3 Guidelines when installing the drain piping................................................................................................... 27
6.3 Connecting the refrigerant piping .................................................................................................................................. 30
6.3.1 About connecting the refrigerant piping ....................................................................................................... 30
6.3.2 Precautions when connecting the refrigerant piping.................................................................................... 31
6.3.3 Guidelines when connecting the refrigerant piping...................................................................................... 31
6.3.4 Pipe bending guidelines ................................................................................................................................. 32
6.3.5 To flare the pipe end ...................................................................................................................................... 32
6.3.6 To connect the refrigerant piping to the indoor unit .................................................................................... 33
6.4 Connecting the electrical wiring..................................................................................................................................... 34
6.4.1 About connecting the electrical wiring.......................................................................................................... 34
6.4.2 Precautions when connecting the electrical wiring....................................................................................... 34
6.4.3 Guidelines when connecting the electrical wiring......................................................................................... 34
6.4.4 Specifications of standard wiring components.............................................................................................. 35
6.4.5 To connect the electrical wiring to the indoor unit....................................................................................... 36
7 Configuration 39
7.1 Field setting..................................................................................................................................................................... 39
8 Commissioning 42
8.1 Overview: Commissioning .............................................................................................................................................. 42
8.2 Precautions when commissioning.................................................................................................................................. 42

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8.3 Checklist before commissioning..................................................................................................................................... 43
8.4 To perform a test run...................................................................................................................................................... 43
8.5 Error codes when performing a test run........................................................................................................................ 45
9 Hand-over to the user 46
10 Disposal 47
11 Technical data 48
11.1 Piping diagram: Indoor unit ............................................................................................................................................ 48
11.2 Wiring diagram................................................................................................................................................................ 48
11.2.1 Unified wiring diagram legend ....................................................................................................................... 48
For the user 52
12 About the system 53
12.1 System layout.................................................................................................................................................................. 53
12.2 Information requirements for fan coil units................................................................................................................... 54
13 User interface 55
14 Before operation 56
15 Operation 57
15.1 Operating the system ..................................................................................................................................................... 57
15.1.1 About operating the system........................................................................................................................... 57
15.1.2 About cooling, heating, fan only, and automatic operation ......................................................................... 57
15.1.3 About the heating operation.......................................................................................................................... 57
15.1.4 To operate the system ................................................................................................................................... 58
15.2 Using the dry program .................................................................................................................................................... 58
15.2.1 About the dry program................................................................................................................................... 58
15.2.2 To use the dry program.................................................................................................................................. 58
15.3 Adjusting the air flow direction ...................................................................................................................................... 58
15.3.1 About the air flow flap.................................................................................................................................... 58
15.4 Active circulation airflow ................................................................................................................................................ 59
15.4.1 To start the active circulation airflow ............................................................................................................ 59
16 Energy saving and optimum operation 61
17 Maintenance and service 62
17.1 Precautions for maintenance and service...................................................................................................................... 62
17.2 Cleaning the air filter, suction grille, air outlet and outside panels............................................................................... 62
17.2.1 To clean the air filter ...................................................................................................................................... 63
17.2.2 To clean the suction grille .............................................................................................................................. 64
17.2.3 To clean the air outlet and outside panels .................................................................................................... 65
17.3 Maintenance after a long stop period............................................................................................................................ 65
17.4 Maintenance before a long stop period......................................................................................................................... 66
17.5 About the refrigerant...................................................................................................................................................... 66
17.6 After-sales service and warranty .................................................................................................................................... 66
17.6.1 Warranty period ............................................................................................................................................. 66
17.6.2 Recommended maintenance and inspection................................................................................................ 66
17.6.3 Recommended maintenance and inspection cycles ..................................................................................... 67
17.6.4 Shortened maintenance and replacement cycles ......................................................................................... 68
18 Troubleshooting 69
18.1 Symptoms that are NOT system malfunctions............................................................................................................... 70
18.1.1 Symptom: The system does not operate....................................................................................................... 70
18.1.2 Symptom: The fan speed does not correspond to the setting...................................................................... 70
18.1.3 Symptom: The fan direction does not correspond to the setting................................................................. 70
18.1.4 Symptom: White mist comes out of a unit (Indoor unit) .............................................................................. 70
18.1.5 Symptom: White mist comes out of a unit (Indoor unit, outdoor unit)........................................................ 70
18.1.6 Symptom: The user interface reads "U4" or "U5" and stops, but then restarts after a few minutes.......... 71
18.1.7 Symptom: Noise of air conditioners (Indoor unit)......................................................................................... 71
18.1.8 Symptom: Noise of air conditioners (Indoor unit, outdoor unit) .................................................................. 71
18.1.9 Symptom: Noise of air conditioners (Outdoor unit)...................................................................................... 71
18.1.10 Symptom: Dust comes out of the unit........................................................................................................... 71
18.1.11 Symptom: The units can give off odours ....................................................................................................... 71
18.1.12 Symptom: The outdoor unit fan does not spin.............................................................................................. 71
18.1.13 Symptom: The display shows "88"................................................................................................................. 71
18.1.14 Symptom: The compressor in the outdoor unit does not stop after a short heating operation ................. 72

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19 Relocation 73
20 Disposal 74
21 Glossary 75

1 | General safety precautions
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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/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
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:

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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".
1.2 For the user
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.

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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.
1.3 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/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.

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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:
▪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.

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▪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 — in case of R410A or R32
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 might be produced if refrigerant gas comes into contact with fire.
DANGER: RISK OF EXPLOSION
Pump down – Refrigerant leakage. If you want to pump down the system, and there
is a leak in the refrigerant circuit:
▪Do NOT use the unit's automatic pump down function, with which you can collect
all refrigerant from the system into the outdoor unit. Possible consequence: Self-
combustion and explosion of the compressor because of air going into the
operating compressor.
▪Use a separate recovery system so that the unit's compressor does NOT have to
operate.
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.

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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.
▪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.

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1.3.4 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.
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.
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.

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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.
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
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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 indoor unit)
▪Indoor unit installation and operation manual:
-Installation and operation instructions
-Format: Paper (in the box of the indoor unit)
▪Installer and user reference guide:
-Preparation of the installation, good practices, 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).

For the installer
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For the installer

3 | About the box
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3 About the box
3.1 Overview: About the box
This chapter describes what you have to do after the box with the indoor unit is
delivered on-site.
It contains information about:
▪Unpacking and handling the unit
▪Removing the accessories from the unit
Keep the following in mind:
▪At delivery, the unit MUST be checked for damage. Any damage MUST be
reported immediately to the claims agent of the carrier.
▪Bring the packed unit as close as possible to its final installation position to
prevent damage during transport.
▪Prepare the path along which you want to bring the unit inside in advance.
3.2 Indoor unit
3.2.1 To unpack and handle the unit
Use a sling of soft material or protective plates together with a rope when lifting
the unit. This to avoid damage or scratches to the unit.
1Lift the unit by holding on to the hanger brackets without exerting any
pressure on other parts, especially on refrigerant piping, drain piping and
other resin parts.
1 2

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3.2.2 To remove the accessories from the indoor unit
1×
1× 1×
8× 4×1×1× 1×
a
4×
1× 1×
7×
e fdcb
h i
m
g
j
k l
aPaper pattern for installation (upper part of packing)
bGeneral safety precautions
cIndoor unit installation and operation manual
dInstallation guide
eWashers for hanger brackets
fScrews (to temporarily attach the paper pattern for installation to the indoor unit)
gCable ties
hMetal clamp
iSealing pads: Large (drain pipe), medium 1 (gas pipe), medium 2 (liquid pipe), small
(electrical wiring)
jDrain hose
kInsulation piece: Small (liquid pipe)
lInsulation piece: Large (gas pipe)
mInsulation piece (drain pipe)

4 | About the units and options
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4 About the units and options
4.1 Overview: About the units and options
This chapter contains information about:
▪Identifying the indoor unit
▪Combining outdoor and indoor units
▪Combining the indoor unit with options
INFORMATION
For year‑round cooling applications with low indoor humidity conditions, such as
Electronic Data Processing rooms, contact your dealer or see the engineering
databook or the service manual.
4.2 Identification
NOTICE
When installing or servicing several units at the same time, make sure NOT to switch
the service panels between different models.
4.2.1 Identification label: Indoor unit
Location

4 | About the units and options
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4.3 System layout
a
b
c
d
ei
f
g
h
aIndoor unit
bOutdoor unit
cUser interface
dSuction air
eDischarge air
fRefrigerant piping + interconnection cable
gDrain pipe
hEarth wiring
iSuction grille and air filter
4.4 Combining units and options
INFORMATION
Certain options might not be available in your country.
4.4.1 Possible options for the indoor unit
Make sure you have the following mandatory options:
▪User interface: Wired or wireless
▪Decoration panel: Standard, self-cleaning or design

5 | Preparation
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5 Preparation
5.1 Overview: Preparation
This chapter describes what you have to do and know before going on-site.
It contains information about:
▪Preparing the installation site
▪Preparing the refrigerant piping
▪Preparing the electrical wiring
5.2 Preparing the installation site
Choose an installation location with sufficient space for carrying the unit in and out
of the site.
Do NOT install the unit in places often used as work place. In case of construction
works (e.g. grinding works) where a lot of dust is created, the unit MUST be
covered.
5.2.1 Installation site requirements of the indoor unit
INFORMATION
Also read the following requirements:
▪General installation site requirements. See the "General safety precautions"
chapter.
▪Refrigerant piping requirements (length, height difference). See further in this
"Preparation" chapter.
INFORMATION
The sound pressure level is less than 70dBA.
CAUTION
Appliance NOT accessible to the general public, install it in a secured area, protected
from easy access.
This unit, both indoor and outdoor, is suitable for installation in a commercial and
light industrial environment.
Do NOT install the unit in the following places:
▪In places where a mineral oil mist, spray or vapour may be present in the
atmosphere. Plastic parts may deteriorate and fall off or cause water leakage.
It is NOT recommended to install the unit in the following places because it may
shorten the life of the unit:
▪Where the voltage fluctuates a lot
▪In vehicles or vessels
▪Where acidic or alkaline vapour is present

5 | Preparation
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NOTICE
The equipment described in this manual may cause electronic noise generated from
radio-frequency energy. The equipment complies to specifications that are designed
to provide reasonable protection against such interference. However, there is no
guarantee that interference will not occur in a particular installation.
It is therefore recommended to install the equipment and electric wires in such a
way that they keep a proper distance from stereo equipment, personal computers,
etc.
b
a
c
df e
(mm)
≥
1500
≥
1500
≥
1000
≥
1000
≥
1000
≥
1000
aEarth leakage protector
bFuse
cOutdoor unit
dIndoor unit
eUser interface
fPersonal computer or radio
▪In places with weak reception, keep distances of 3 m or more to avoid
electromagnetic disturbance of other equipment and use conduit tubes for
power and transmission lines.
▪Fluorescent lights. When installing a wireless user interface in a room with
fluorescent lights, mind the following to avoid interference:
-Install the wireless user interface as close as possible to the indoor unit.
-Install the indoor unit as far as possible from the fluorescent lights.
▪Take care that in the event of a water leak, water cannot cause any damage to
the installation space and surroundings.
▪Choose a location where the operation noise or the hot/cold air discharged from
the unit will not disturb anyone.
▪Air flow. Make sure nothing blocks the air flow.
▪Drainage. Make sure condensation water can be evacuated properly.
▪Paper pattern for installation (upper part of packing) (accessory). When
selecting the installation location, use the paper pattern. It contains the
dimensions of the unit and the required ceiling opening.
▪Air flow directions. You can select different air flow directions. Choose the one
best suited for the room. For more information, see the installation manual of
the optional blocking pad kit.
Example:
1
2
3
4
1
2
3
4
1
2
3
a b c
aAll-round air flow
b4-way air flow (with closed corners) (optional blocking pad kit required)
c3-way air flow (optional blocking pad kit required)