Daikin FXFQ20BVEB, FXFQ25BVEB, FXFQ32BVEB, FXFQ40BVEB, FXFQ50BVEB Installer reference guide
...
Installer and user
reference guide
VRV system air conditioner
FXFQ20BVEB
FXFQ25BVEB
FXFQ32BVEB
FXFQ40BVEB
FXFQ50BVEB
FXFQ63BVEB
FXFQ80BVEB
FXFQ100BVEB
FXFQ125BVEB
Installer and user reference guide
VRV system air conditioner
English
Table of contents
Table of contents
1 General safety precautions 3
1.1 About the documentation .......................................................... 3
1.1.1 Meaning of warnings and symbols.............................. 3
1.2 For the user ............................................................................... 3
1.3 For the installer.......................................................................... 3
1.3.1 General ....................................................................... 3
1.3.2 Installation site ............................................................ 4
1.3.3 Refrigerant .................................................................. 5
1.3.4 Brine............................................................................ 6
1.3.5 Water .......................................................................... 6
1.3.6 Electrical ..................................................................... 6
2 About the documentation 7
2.1 About this document.................................................................. 7
For the installer 8
3 About the box 8
3.1 Overview: About the box ........................................................... 8
3.2 Indoor unit ................................................................................. 8
3.2.1 To unpack and handle the unit.................................... 8
3.2.2 To remove the accessories from the indoor unit......... 8
4 About the units and options 8
4.1 Overview: About the units and options...................................... 8
4.2 Identification .............................................................................. 8
4.2.1 Identification label: Indoor unit .................................... 9
4.3 System layout............................................................................ 9
4.4 Combining units and options ..................................................... 9
4.4.1 Possible options for the indoor unit............................. 9
5 Preparation 9
5.1 Overview: Preparation............................................................... 9
5.2 Preparing the installation site .................................................... 9
5.2.1 Installation site requirements of the indoor unit .......... 9
5.3 Preparing refrigerant piping....................................................... 10
5.3.1 Refrigerant piping requirements.................................. 10
5.3.2 Refrigerant piping insulation ....................................... 11
5.4 Preparing electrical wiring ......................................................... 11
5.4.1 About preparing electrical wiring................................. 11
6 Installation 11
6.1 Overview: Installation ................................................................ 11
6.2 Mounting the indoor unit............................................................ 11
6.2.1 Precautions when mounting the indoor unit................ 11
6.2.2 Guidelines when installing the indoor unit................... 11
6.2.3 Guidelines when installing the drain piping................. 12
6.3 Connecting the refrigerant piping .............................................. 14
6.3.1 About connecting the refrigerant piping ...................... 14
6.3.2 Precautions when connecting the refrigerant piping... 14
6.3.3 Guidelines when connecting the refrigerant piping..... 14
6.3.4 Pipe bending guidelines.............................................. 15
6.3.5 To flare the pipe end................................................... 15
6.3.6 To connect the refrigerant piping to the indoor unit .... 15
6.4 Connecting the electrical wiring................................................. 15
6.4.1 About connecting the electrical wiring......................... 15
6.4.2 Precautions when connecting the electrical wiring ..... 16
6.4.3 Guidelines when connecting the electrical wiring ....... 16
6.4.4 Specifications of standard wiring components............ 16
6.4.5 To connect the electrical wiring on the indoor unit...... 16
7 Configuration 17
7.1 Field settings ............................................................................. 17
8 Commissioning 18
8.1 Overview: Commissioning......................................................... 18
8.2 Precautions when commissioning .............................................. 19
8.3 Checklist before commissioning................................................. 19
8.4 To perform a test run.................................................................. 19
8.5 Error codes when performing a test run ..................................... 20
9 Hand-over to the user 20
10 Disposal 20
11 Technical data 20
11.1 Piping diagram: Indoor unit ........................................................ 21
11.2 Wiring diagram ........................................................................... 21
11.2.1 Unified wiring diagram legend...................................... 21
For the user 22
12 About the system 22
12.1 System layout ............................................................................. 22
12.2 Information requirements for fan coil units ................................. 22
13 User interface 22
14 Before operation 22
15 Operation 23
15.1 Operating the system ................................................................. 23
15.1.1 About operating the system ......................................... 23
15.1.2 About cooling, heating, fan only, and automatic
operation ...................................................................... 23
15.1.3 About the heating operation ......................................... 23
15.1.4 To operate the system ................................................. 23
15.2 Using the dry program ................................................................ 23
15.2.1 About the dry program ................................................. 23
15.2.2 To use the dry program................................................ 23
15.3 Adjusting the air flow direction.................................................... 24
15.3.1 About the air flow flap .................................................. 24
15.4 Active circulation airflow ............................................................. 24
15.4.1 To start the active circulation airflow ............................ 24
16 Energy saving and optimum operation 24
17 Maintenance and service 25
17.1 Precautions for maintenance and service .................................. 25
17.2 Cleaning the air filter, suction grille, air outlet and outside
panels......................................................................................... 25
17.2.1 To clean the air filter .................................................... 25
17.2.2 To clean the suction grille ............................................ 26
17.2.3 To clean the air outlet and outside panels ................... 26
17.3 Maintenance after a long stop period ......................................... 26
17.4 Maintenance before a long stop period ...................................... 26
17.5 About the refrigerant................................................................... 26
17.6 After-sales service and warranty ................................................ 27
17.6.1 Warranty period ........................................................... 27
17.6.2 Recommended maintenance and inspection ............... 27
17.6.3 Recommended maintenance and inspection cycles .... 27
17.6.4 Shortened maintenance and replacement cycles ........ 27
18 Troubleshooting 27
18.1 Symptoms that are NOT system malfunctions ........................... 28
18.1.1 Symptom: The system does not operate ..................... 28
18.1.2 Symptom: The fan speed does not correspond to the
setting .......................................................................... 28
18.1.3 Symptom: The fan direction does not correspond to
the setting .................................................................... 28
18.1.4 Symptom: White mist comes out of a unit (Indoor
unit) .............................................................................. 28
18.1.5 Symptom: White mist comes out of a unit (Indoor
unit, outdoor unit) ......................................................... 28
18.1.6 Symptom: The user interface display reads "U4" or
"U5" and stops, but then restarts after a few minutes.. 28
18.1.7 Symptom: Noise of air conditioners (Indoor unit) ......... 28
Installer and user reference guide
2
FXFQ20~125BVEB
VRV system air conditioner
4P561452-1 – 2018.12
1 General safety precautions
18.1.8 Symptom: Noise of air conditioners (Indoor unit,
outdoor unit)................................................................ 29
18.1.9 Symptom: Noise of air conditioners (Outdoor unit) ..... 29
18.1.10 Symptom: Dust comes out of the unit ......................... 29
18.1.11 Symptom: The units can give off odours..................... 29
18.1.12 Symptom: The outdoor unit fan does not spin ............ 29
18.1.13 Symptom: The display shows "88".............................. 29
18.1.14 Symptom: The compressor in the outdoor unit does
not stop after a short heating operation ...................... 29
19 Relocation 29
20 Disposal 29
21 Glossary 29
1 General safety precautions
1.1 About the documentation
▪ The original documentation is written in English. All other
languages are translations.
▪ The precautions described in this document cover very important
topics, follow them carefully.
▪ The installation of the system, and all activities described in the
installation manual and the installer reference guide MUST be
performed by an authorised installer.
1.1.1 Meaning of warnings and symbols
Symbol Explanation
For more information, see the installer and user
reference guide.
1.2 For the user
▪ If you are NOT sure how to operate the unit, contact your installer.
▪ This appliance can be used by children aged from 8 years and
above and persons with reduced physical, sensory or mental
capabilities or lack of experience and knowledge if they have been
given supervision or instruction concerning use of the appliance in
a safe way and understand the hazards involved. Children shall
NOT play with the appliance. Cleaning and user maintenance
shall NOT be made by children without supervision.
WARNING
To prevent electric shocks or fire:
▪ Do NOT rinse the unit.
▪ Do NOT operate the unit with wet hands.
▪ Do NOT place any objects containing water on the unit.
NOTICE
▪ Do NOT place any objects or equipment on top of the
unit.
▪ Do NOT sit, climb or stand on the unit.
▪ Units are marked with the following symbol:
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.
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
INFORMATION
Indicates useful tips or additional information.
Symbol Explanation
Before installation, read the installation and
operation manual, and the wiring instruction sheet.
Before performing maintenance and service tasks,
read the service manual.
FXFQ20~125BVEB
VRV system air conditioner
4P561452-1 – 2018.12
1.3.1 General
If you are NOT sure how to install or operate the unit, contact your
dealer.
Installer and user reference guide
3
1 General safety precautions
NOTICE
Improper installation or attachment of equipment or
accessories could result in electric shock, short-circuit,
leaks, fire or other damage to the equipment. Only use
accessories, optional equipment and spare parts made or
approved by Daikin.
WARNING
Make sure installation, testing and applied materials
comply with applicable legislation (on top of the
instructions described in the Daikin documentation).
CAUTION
Wear adequate personal protective equipment (protective
gloves, safety glasses,…) when installing, maintaining or
servicing the system.
WARNING
Tear apart and throw away plastic packaging bags so that
nobody, especially children, can play with them. Possible
risk: suffocation.
DANGER: RISK OF BURNING
▪ Do NOT touch the refrigerant piping, water piping or
internal parts during and immediately after operation. It
could be too hot or too cold. Give it time to return to
normal temperature. If you must touch it, wear
protective gloves.
▪ Do NOT touch any accidental leaking refrigerant.
WARNING
Provide adequate measures to prevent that the unit can be
used as a shelter by small animals. Small animals that
make contact with electrical parts can cause malfunctions,
smoke or fire.
CAUTION
Do NOT touch the air inlet or aluminium fins of the unit.
NOTICE
▪ Do NOT place any objects or equipment on top of the
unit.
▪ Do NOT sit, climb or stand on the unit.
NOTICE
Works executed on the outdoor unit are best done under
dry weather conditions to avoid water ingress.
In accordance with the applicable legislation, it might be necessary
to provide a logbook with the product containing at least: information
on maintenance, repair work, results of tests, stand-by periods,…
Also, at least, following information MUST be provided at an
accessible place at the product:
▪ Instructions for shutting down the system in case of an emergency
▪ Name and address of fire department, police and hospital
▪ Name, address and day and night telephone numbers for
obtaining service
In Europe, EN378 provides the necessary guidance for this logbook.
1.3.2 Installation site
▪ Provide sufficient space around the unit for servicing and air
circulation.
▪ Make sure the installation site withstands the weight and vibration
of the unit.
▪ Make sure the area is well ventilated. Do NOT block any
ventilation openings.
▪ Make sure the unit is level.
Do NOT install the unit in the following places:
▪ In potentially explosive atmospheres.
▪ In places where there is machinery that emits electromagnetic
waves. Electromagnetic waves may disturb the control system,
and cause malfunction of the equipment.
▪ In places where there is a risk of fire due to the leakage of
flammable gases (example: thinner or gasoline), carbon fibre,
ignitable dust.
▪ In places where corrosive gas (example: sulphurous acid gas) is
produced. Corrosion of copper pipes or soldered parts may cause
the refrigerant to leak.
Instructions for equipment using R32 refrigerant
If applicable.
WARNING
▪ Do NOT pierce or burn.
▪ Do NOT use means to accelerate the defrosting
process or to clean the equipment, other than those
recommended by the manufacturer.
▪ Be aware that R32 refrigerant does NOT contain an
odour.
WARNING
The appliance shall be stored so as to prevent mechanical
damage and in a well-ventilated room without continuously
operating ignition sources (example: open flames, an
operating gas appliance or an operating electric heater)
and have a room size as specified below.
NOTICE
▪ Do NOT re-use joints which have been used already.
▪ Joints made in installation between parts of refrigerant
system shall be accessible for maintenance purposes.
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.
Installation space requirements
NOTICE
▪ Pipework shall be protected from physical damage.
▪ Installation of pipework shall be kept to a minimum.
WARNING
If appliances contain R32 refrigerant, the floor area of the
room in which the appliances are installed, operated and
stored MUST be larger than the minimum floor area
defined in table below A (m2). This applies to:
▪ Indoor units without a refrigerant leakage sensor; in
case of indoor units with refrigerant leakage sensor,
consult the installation manual
▪ Outdoor units installed or stored indoors (e.g. winter
garden, garage, machinery room)
▪ Pipework in unventilated spaces
Installer and user reference guide
4
FXFQ20~125BVEB
VRV system air conditioner
4P561452-1 – 2018.12
To determine the minimum floor area
Contains fluorinated greenhouse gases
2
1
1
1
2
2
kg
tCO2eq
1000
GWP × kg
=
=
+
kg
=
kg
=
GWP: xxx
R32
0
10
20
30
40
50
60
70
80
90
100
110
120
130
140
150
160
170
180
190
200
210
220
230
240
250
260
270
280
290
300
310
320
330
340
350
360
370
380
390
400
410
420
430
440
450
460
470
480
490
500
510
520
530
540
550
1.822.2
2.4
2.6
2.833.2
3.4
3.6
3.844.2
4.4
4.6
4.855.2
5.4
5.6
5.866.2
6.4
6.6
6.877.2
7.4
7.6
7.8
1.843 7.956
8.0
A
min
(m2)
Floor-standing unit
(c)
Wall-mounted unit
(b)
Ceiling-mounted unit
(a)
m (kg)
Ceiling-mounted
unit
(a)
4.6 13.4
4.6 180
4.8 14.6
4.8 196
5.0 15.8
5.0 213
≤1.842 —
5.2 17.1
≤1.842 —
5.2 230
1.843 3.64
5.4 18.5
1.843 28.9
5.4 248
2.0 3.95
5.6 19.9
2.0 34.0
5.6 267
2.2 4.34
5.8 21.3
2.2 41.2
5.8 286
2.4 4.74
6.0 22.8
2.4 49.0
6.0 306
2.6 5.13
6.2 24.3
2.6 57.5
6.2 327
2.8 5.53
6.4 25.9
2.8 66.7
6.4 349
3.0 5.92
6.6 27.6
3.0 76.6
6.6 371
3.2 6.48
6.8 29.3
3.2 87.2
6.8 394
3.4 7.32
7.0 31.0
3.4 98.4
7.0 417
3.6 8.20
7.2 32.8
3.6 110
7.2 441
3.8 9.14
7.4 34.7
3.8 123
7.4 466
4.0 10.1
7.6 36.6
4.0 136
7.6 492
4.2 11.2
7.8 38.5
4.2 150
7.8 518
4.4 12.3
7.956 40.1
4.4 165
7.956 539
m (kg)
A
min
(m2)
4.6 20.0
4.8 21.8
5.0 23.6
≤1.842 —
5.2 25.6
1.843 4.45
5.4 27.6
2.0 4.83
5.6 29.7
2.2 5.31
5.8 31.8
2.4 5.79
6.0 34.0
2.6 6.39
6.2 36.4
2.8 7.41
6.4 38.7
3.0 8.51
6.6 41.2
3.2 9.68
6.8 43.7
3.4 10.9
7.0 46.3
3.6 12.3
7.2 49.0
3.8 13.7
7.4 51.8
4.0 15.1
7.6 54.6
4.2 16.7
7.8 57.5
4.4 18.3
7.956 59.9
Wall-mounted
unit
(b)
m (kg)
A
min
(m2)
Floor-standing
unit
(c)
m (kg)
A
min
(m2)
1 Determine the total refrigerant charge in the system (=factory
refrigerant charge + additional refrigerant amount
charged).
2 Determine which graph or table to use.
▪ For indoor units: Is the unit ceiling-mounted, wall-mounted or
floor-standing?
▪ For outdoor units installed or stored indoors, and field piping
in unventilated spaces, this depends on the installation
height:
If the installation height is… Then use the graph or table for…
<1.8m Floor-standing units
1.8≤x<2.2m Wall-mounted units
≥2.2m Ceiling-mounted units
3 Use the graph or table to determine the minimum floor area.
1 General safety precautions
FXFQ20~125BVEB
VRV system air conditioner
4P561452-1 – 2018.12
m Total refrigerant charge in the system
A
Minimum floor area
min
(a) Ceiling-mounted unit (= Ceiling-mounted unit)
(b) Wall-mounted unit (= Wall-mounted unit)
(c) Floor-standing unit (= Floor-standing unit)
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.
Installer and user reference guide
5
1 General safety precautions
DANGER: RISK OF EXPLOSION
Pump down – Refrigerant leakage. If you want to pump
down the system, and there is a leak in the refrigerant
circuit:
▪ Do NOT use the unit's automatic pump down function,
with which you can collect all refrigerant from the
system into the outdoor unit. Possible consequence:
Self-combustion and explosion of the compressor
because of air going into the operating compressor.
▪ Use a separate recovery system so that the unit's
compressor does NOT have to operate.
WARNING
ALWAYS recover the refrigerant. Do NOT release them
directly into the environment. Use a vacuum pump to
evacuate the installation.
NOTICE
After all the piping has been connected, make sure there is
no gas leak. Use nitrogen to perform a gas leak detection.
NOTICE
▪ To avoid compressor breakdown, do NOT charge more
than the specified amount of refrigerant.
▪ When the refrigerant system is to be opened,
refrigerant MUST be treated according to the applicable
legislation.
WARNING
Make sure there is no oxygen in the system. Refrigerant
may only be charged after performing the leak test and the
vacuum drying.
▪ In case re-charge is required, refer to the nameplate of the unit. It
states the type of refrigerant and necessary amount.
▪ 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")
A siphon tube is NOT present Charge with the cylinder upside
Charge with the cylinder upright.
down.
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
98/83EC.
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.
▪ Open refrigerant cylinders slowly.
▪ Charge the refrigerant in liquid form. Adding it in gas form may
prevent normal operation.
Installer and user reference guide
6
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.
FXFQ20~125BVEB
VRV system air conditioner
4P561452-1 – 2018.12
2 About the documentation
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.
WARNING
▪ After finishing the electrical work, confirm that each
electrical component and terminal inside the electrical
components box is connected securely.
▪ Make sure all covers are closed before starting up the
unit.
NOTICE
Only applicable if the power supply is three‑phase, and the
compressor has an ON/OFF starting method.
If there exists the possibility of reversed phase after a
momentary black out and the power goes on and off while
the product is operating, attach a reversed phase
protection circuit locally. Running the product in reversed
phase can break the compressor and other parts.
2 About the documentation
2.1 About this document
Target audience
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
extranet (authentication required).
FXFQ20~125BVEB
VRV system air conditioner
4P561452-1 – 2018.12
Installer and user reference guide
7
3 About the box
1 2
8× 4×1×1× 1×
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1×
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1×
7×
1×
e fdcb
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For the installer
3 About the box
3.1 Overview: About the box
This chapter describes what you have to do after the box with the
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 carrier's claims agent.
▪ 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.
Lift 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.
3.2.2 To remove the accessories from the indoor unit
a Paper pattern for installation (upper part of packing)
b General safety precautions
c Indoor unit installation and operation manual
d Installation guide
e Washers for hanger brackets
f Screws (to temporarily attach the paper pattern for
installation to the indoor unit)
g Cable ties
h Metal clamp
i Insulation piece (drain pipe)
j Sealing pads: Large (drain pipe), medium 1 (gas pipe),
medium 2 (liquid pipe), small (electrical wiring)
k Drain hose
l Insulation piece: Small (liquid pipe)
m Insulation piece: Large (gas pipe)
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.
Installer and user reference guide
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FXFQ20~125BVEB
VRV system air conditioner
4P561452-1 – 2018.12
5 Preparation
a
b
c
d
e
i
f
g
h
b
a
c
df e
(mm)
≥
1500
≥
1500
≥
1000≥1000
≥
1000≥1000
4.2.1 Identification label: Indoor unit
Location
4.3 System layout
NOTICE
Design of the system must not be done at temperatures
below –15°C.
a Indoor unit
b Outdoor unit
c User interface
d Suction air
e Discharge air
f Refrigerant piping + interconnection cable
g Drain pipe
h Earth wiring
i Suction grille and air filter
4.4 Combining units and options
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
▪ Preparing the electrical wiring
5.2 Preparing the installation 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.
Choose an installation location with sufficient space for carrying the
unit in and out of the site.
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 70dBA.
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
NOTICE
The equipment described in this manual may cause
electronic noise generated from radio-frequency energy.
The equipment complies to specifications that are
designed to provide reasonable protection against such
interference. However, there is no guarantee that
interference will not occur in a particular installation.
It is therefore recommended to install the equipment and
electric wires keeping proper distances away from stereo
equipment, personal computers, etc.
5 Preparation
5.1 Overview: Preparation
This chapter describes what you have to do and know before going
on-site.
It contains information about:
▪ Preparing the installation site
▪ Preparing the refrigerant piping
FXFQ20~125BVEB
VRV system air conditioner
4P561452-1 – 2018.12
a Earth leakage protector
b Fuse
c Outdoor unit
d Indoor unit
e User interface
f Personal computer or radio
Installer and user reference guide
9
5 Preparation
1
2
3
4
1
2
3
4
1
2
3
a b c
(mm)
≥1500
≥
2000
≥
4000
≥1500
A
B
C
ba dac
≥1500 ≥500 ≥200
a
A A A
b c
t
Ø
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 hot/cold air discharged from the unit
or the operation noise, 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. Also make sure the "Air
flow direction" field setting corresponds with the actual situation
(see "7.1Field settings"on page17).
Example:
≥298mm: In case of installation with standard decoration
panel
≥340mm: In case of installation with design decoration
panel
≥348mm: In case of installation with fresh air intake kit
≥378mm: In case of installation with self-cleaning
decoration panel
a Indoor unit
b Lighting (the figure shows ceiling-mounted lighting, but
recessed lighting is also allowed)
c Air fan
d Static volume (example: table)
▪ A: Minimum distance to the wall. Depends on the air flow
directions towards the wall.
a Air outlet and corners open
b Air outlet closed, corners open (optional blocking pad kit
required)
c Air outlet and corners closed (optional blocking pad kit
required)
▪ B: Minimum and maximum distance to the floor:
▪ Minimum: 2.7m to avoid accidental touching.
▪ Maximum: Depends on the air flow directions and the capacity
class. Also make sure the "Ceiling height" field setting
corresponds with the actual situation. See "7.1 Field
settings"on page17.
a All-round air flow
b 4-way air flow (with closed corners) (optional blocking pad
kit required)
c 3-way air flow (optional blocking pad kit required)
▪ Ceiling insulation. When conditions in the ceiling exceed 30°C
and a relative humidity of 80%, or when fresh air is inducted into
the ceiling, then additional insulation is required (minimum 10mm
thickness, polyethylene foam).
▪ Spacing. Mind the following requirements:
A Minimum distance to the wall (see below)
B Minimum and maximum distance to the floor (see below)
C 20~63 class:
≥214mm: In case of installation with standard decoration
panel
≥256mm: In case of installation with design decoration
panel
≥294mm: In case of installation with self-cleaning
decoration panel
≥263mm: In case of installation with fresh air intake kit
80~100 class:
≥256mm: In case of installation with standard decoration
panel
≥298mm: In case of installation with design decoration
panel
≥306mm: In case of installation with fresh air intake kit
≥316mm: In case of installation with self-cleaning
decoration panel
125 class:
If air flow direction… Then B
FXFQ20~100 FXFQ125
All-round ≤3.5m ≤4.2m
(a)
4-way
3-way
(a)
(a) Optional blocking kit required
≤4.0m ≤4.5m
≤3.5m ≤4.2m
5.3 Preparing refrigerant piping
5.3.1 Refrigerant piping requirements
INFORMATION
Also read the precautions and requirements in the
"General safety precautions" chapter.
Refrigerant piping diameter
Use the same diameters as the connections on the outdoor units:
Class L1 liquid piping L1 gas piping
20~50 Ø6.4mm Ø12.7mm
63~125 Ø9.5mm Ø15.9mm
Refrigerant piping material
▪ Piping material: Phosphoric acid deoxidised seamless copper.
▪ Flare connections: Only use annealed material.
▪ Piping temper grade and thickness:
Outer diameter
Temper grade Thickness (t)
(Ø)
6.4mm (1/4") Annealed (O) ≥0.8mm
9.5mm (3/8")
12.7mm (1/2")
15.9mm (5/8")
(a)
Installer and user reference guide
10
FXFQ20~125BVEB
VRV system air conditioner
4P561452-1 – 2018.12
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