Daikin RXJ20M5V1B, RXJ25M5V1B, RXJ35M5V1B, RXA20A5V1B, RXA25A5V1B Installer reference guide
...
Installer reference guide
R32 Split system air conditioners
RXJ20M5V1B
RXJ25M5V1B
RXJ35M5V1B
RXA20A5V1B
RXA25A5V1B
RXA35A5V1B
RXM20R5V1B
RXM25R5V1B
RXM35R5V1B
ARXM25R5V1B
ARXM35R5V1B
RXJ20M5V1B9
RXJ25M5V1B9
RXJ35M5V1B9
RXA20A5V1B9
RXA25A5V1B9
RXA35A5V1B9
RXM20R5V1B9
RXM25R5V1B9
RXM35R5V1B9
ARXM25R5V1B9
ARXM35R5V1B9
Table of contents
Table of contents
1 About the documentation 4
1.1 About this document ...................................................................................................................................................... 4
2 General safety precautions 5
2.1 About the documentation .............................................................................................................................................. 5
2.1.1 Meaning of warnings and symbols ................................................................................................................ 5
2.2 For the installer............................................................................................................................................................... 6
2.2.1 General ........................................................................................................................................................... 6
2.2.2 Installation site ............................................................................................................................................... 7
2.2.3 Refrigerant — in case of R410A or R32.......................................................................................................... 10
2.2.4 Electrical ......................................................................................................................................................... 12
3 Specific installer safety instructions 15
4 About the box 21
4.1 Overview: About the box ................................................................................................................................................ 21
4.2 Outdoor unit ................................................................................................................................................................... 21
4.2.1 To unpack the outdoor unit ........................................................................................................................... 21
4.2.2 To remove the accessories from the outdoor unit........................................................................................ 22
5 About the unit 24
5.1 Overview: About the units and options.......................................................................................................................... 24
5.2 Identification ................................................................................................................................................................... 24
5.2.1 Identification label: Outdoor unit .................................................................................................................. 24
6 Unit installation 25
6.1 Preparing the installation site......................................................................................................................................... 25
6.1.1 Installation site requirements of the outdoor unit........................................................................................ 26
6.1.2 Additional installation site requirements of the outdoor unit in cold climates............................................ 28
6.2 Opening and closing the unit.......................................................................................................................................... 29
6.2.1 About opening the units................................................................................................................................. 29
6.2.2 To open the outdoor unit ............................................................................................................................... 29
6.2.3 To close the outdoor unit ............................................................................................................................... 29
6.3 Mounting the outdoor unit............................................................................................................................................. 30
6.3.1 About mounting the outdoor unit ................................................................................................................. 30
6.3.2 Precautions when mounting the outdoor unit .............................................................................................. 30
6.3.3 To provide the installation structure ............................................................................................................. 30
6.3.4 To install the outdoor unit ............................................................................................................................. 31
6.3.5 To provide drainage........................................................................................................................................ 31
6.3.6 To prevent the outdoor unit from falling over .............................................................................................. 32
7 Piping installation 33
7.1 Preparing refrigerant piping ........................................................................................................................................... 33
7.1.1 Refrigerant piping requirements.................................................................................................................... 33
7.1.2 Refrigerant piping insulation .......................................................................................................................... 34
7.1.3 Refrigerant piping length and height difference ........................................................................................... 34
7.2 Connecting the refrigerant piping .................................................................................................................................. 34
7.2.1 About connecting the refrigerant piping ....................................................................................................... 34
7.2.2 Precautions when connecting the refrigerant piping .................................................................................... 35
7.2.3 Guidelines when connecting the refrigerant piping ...................................................................................... 36
7.2.4 Pipe bending guidelines ................................................................................................................................. 36
7.2.5 To flare the pipe end ...................................................................................................................................... 37
7.2.6 Using the stop valve and service port ............................................................................................................ 37
7.2.7 To connect the refrigerant piping to the outdoor unit ................................................................................. 39
7.3 Checking the refrigerant piping...................................................................................................................................... 39
7.3.1 About checking the refrigerant piping ........................................................................................................... 39
7.3.2 Precautions when checking the refrigerant piping........................................................................................ 40
7.3.3 To check for leaks ........................................................................................................................................... 40
7.3.4 To perform vacuum drying............................................................................................................................. 41
Installer reference guide
2
8 Charging refrigerant 43
8.1 About charging refrigerant ............................................................................................................................................. 43
8.2 About the refrigerant...................................................................................................................................................... 44
8.3 Precautions when charging refrigerant.......................................................................................................................... 45
8.4 To determine the additional refrigerant amount .......................................................................................................... 45
8.5 To determine the complete recharge amount .............................................................................................................. 45
8.6 To charge additional refrigerant..................................................................................................................................... 45
RXJ-M(9)_RXA-A(9)_RXM-R(9)_ARXM-R(9)
R32 Split system air conditioners
4P519439-12M – 2021.02
Table of contents
8.7 To fix the fluorinated greenhouse gases label ............................................................................................................... 46
9 Electrical installation 47
9.1 About connecting the electrical wiring .......................................................................................................................... 47
9.1.1 Precautions when connecting the electrical wiring....................................................................................... 47
9.1.2 Guidelines when connecting the electrical wiring......................................................................................... 49
9.1.3 Specifications of standard wiring components.............................................................................................. 50
9.2 To connect the electrical wiring to the outdoor unit..................................................................................................... 50
10 Finishing the outdoor unit installation 52
10.1 To finish the outdoor unit installation............................................................................................................................ 52
10.2 To close the outdoor unit ............................................................................................................................................... 52
11 Configuration 53
11.1 Facility setting ................................................................................................................................................................. 53
11.1.1 To set the facility mode.................................................................................................................................. 53
11.2 Standby electricity saving function................................................................................................................................. 53
11.2.1 About the standby electricity saving function ............................................................................................... 53
12 Commissioning 55
12.1 Precautions when commissioning .................................................................................................................................. 55
12.2 Checklist before commissioning ..................................................................................................................................... 55
12.3 Checklist during commissioning ..................................................................................................................................... 56
12.4 To perform a test run...................................................................................................................................................... 56
12.5 Starting up the outdoor unit........................................................................................................................................... 57
13 Hand-over to the user 58
14 Maintenance and service 59
14.1 Overview: Maintenance and service .............................................................................................................................. 59
14.2 Maintenance safety precautions .................................................................................................................................... 59
14.3 Checklist for yearly maintenance of the outdoor unit ................................................................................................... 59
14.4 About the compressor .................................................................................................................................................... 60
15 Troubleshooting 61
15.1 Overview: Troubleshooting ............................................................................................................................................ 61
15.2 Precautions when troubleshooting ................................................................................................................................ 61
15.3 Solving problems based on symptoms ........................................................................................................................... 61
15.3.1 Symptom: The unit is NOT heating or cooling as expected........................................................................... 61
15.4 Fault diagnosis using LED on outdoor unit PCB.............................................................................................................. 62
16 Disposal 63
16.1 Overview: Disposal.......................................................................................................................................................... 63
16.2 To pump down ................................................................................................................................................................ 63
16.3 To start and stop forced cooling..................................................................................................................................... 64
16.3.1 To start and stop forced cooling using the indoor unit ON/OFF switch ....................................................... 64
16.3.2 To start and stop forced cooling using the indoor unit user interface ......................................................... 64
17 Glossary 65
RXJ-M(9)_RXA-A(9)_RXM-R(9)_ARXM-R(9)
R32 Split system air conditioners
4P519439-12M – 2021.02
Installer reference guide
3
1 | About the documentation
1 About the documentation
1.1 About this document
Target audience
Authorised installers
WARNING
Make sure installation, servicing, maintenance, repair and applied materials follow
the instructions from Daikin 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.
INFORMATION
This document only describes installation instructions specific to the outdoor unit.
For installation of the indoor unit (mounting the indoor unit, connecting the
refrigerant piping to the indoor unit, connecting the electrical wiring to the indoor
unit …), see the installation manual of the indoor unit.
Documentation set
This document is part of a documentation set. The complete set consists of:
▪ General safety precautions:
- Safety instructions that you MUST read before installing
- Format: Paper (in the box of the outdoor unit)
▪ Outdoor unit installation manual:
- Installation instructions
- Format: Paper (in the box of the outdoor unit)
▪ Installer reference guide:
- Preparation of the installation, reference data,…
- 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).
Installer reference guide
4
▪ The full set of latest technical data is available on the Daikin Business Portal
(authentication required).
RXJ-M(9)_RXA-A(9)_RXM-R(9)_ARXM-R(9)
R32 Split system air conditioners
4P519439-12M – 2021.02
2 General safety precautions
2.1 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.
2.1.1 Meaning of warnings and symbols
DANGER
Indicates a situation that results in death or serious injury.
2 | General safety precautions
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.
RXJ-M(9)_RXA-A(9)_RXM-R(9)_ARXM-R(9)
R32 Split system air conditioners
4P519439-12M – 2021.02
NOTICE
Indicates a situation that could result in equipment or property damage.
INFORMATION
Indicates useful tips or additional information.
Symbols used on the unit:
Installer reference guide
5
2 | General safety precautions
Symbols used in the documentation:
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.
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".
2.2 For the installer
2.2.1 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.
WARNING
Make sure installation, testing and applied materials comply with applicable
legislation (on top of the instructions described in the Daikin documentation).
Installer reference guide
6
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.
RXJ-M(9)_RXA-A(9)_RXM-R(9)_ARXM-R(9)
R32 Split system air conditioners
4P519439-12M – 2021.02
2 | General safety precautions
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,…
2.2.2 Installation site
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.
▪ 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.
Instructions for equipment using R32 refrigerant
RXJ-M(9)_RXA-A(9)_RXM-R(9)_ARXM-R(9)
R32 Split system air conditioners
4P519439-12M – 2021.02
▪ In places where corrosive gas (example: sulphurous acid gas) is produced.
Corrosion of copper pipes or soldered parts may cause the refrigerant to leak.
WARNING: MILDLY FLAMMABLE MATERIAL
The refrigerant inside this unit is mildly flammable.
Installer reference guide
7
2 | General safety precautions
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 wellventilated 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.
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
If one or more rooms are connected to the unit using a duct system, make sure:
▪ there are no operating ignition sources (example: open flames, an operating gas
appliance or an operating electric heater) in case the floor area is less than the
minimum floor area A (m²).
▪ no auxiliary devices, which may be a potential ignition source, are installed in the
duct work (example: hot surfaces with a temperature exceeding 700°C and
electric switching device);
▪ only auxiliary devices approved by the manufacturer are used in the duct work;
▪ air inlet AND outlet are connected directly to the same room by ducting. Do NOT
use spaces such as a false ceiling as a duct for the air inlet or outlet.
NOTICE
▪ Precautions shall be taken to avoid excessive vibration or pulsation to
refrigeration piping.
▪ Protection devices, piping and fittings shall be protected as far as possible against
adverse environmental effects.
▪ Provision shall be made for expansion and contraction of long runs of piping.
▪ Piping in refrigerating systems shall be designed and installed such as to minimise
the likelihood of hydraulic shock damaging the system.
▪ The indoor equipment and pipes shall be securely mounted and guarded such
that accidental rupture of equipment or pipes cannot occur from 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 installation between parts of refrigerant system shall be accessible
for maintenance purposes.
Installer reference guide
8
RXJ-M(9)_RXA-A(9)_RXM-R(9)_ARXM-R(9)
R32 Split system air conditioners
4P519439-12M – 2021.02
Installation space requirements
Contains fluorinated greenhouse gases
2
1
1
1
2
2
kg
tCO2eq
1000
GWP × kg
=
=
+
kg
=
kg
=
GWP: xxx
R32
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)
NOTICE
▪ Pipework shall be protected from physical damage.
▪ Installation of pipework shall be kept to a minimum.
To determine the minimum floor area
1 Determine the total refrigerant charge in the system (= factory refrigerant
charge + additional refrigerant amount charged).
2 | General safety precautions
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, 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.
RXJ-M(9)_RXA-A(9)_RXM-R(9)_ARXM-R(9)
R32 Split system air conditioners
4P519439-12M – 2021.02
Installer reference guide
9
2 | General safety precautions
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
560
570
580
590
600
610
620
630
640
650
660
670
680
690
700
710
720
730
740
750
760
770
1.843
9.55
2.21.8
2.4 2.8 3.2 3.6 4 4.4 4.8 5.2 5.6 6 6.4 6.8 7.2 7.6 8 8.4 8.8 9.22
2.6 3 3.4 3.8 4.2
4.6
5 5.4 5.8 6.2 6.6 7 7.4 7.8 8.2 8.6 9 9.4
Floor-standing unit
(c)
Wall-mounted unit
(b)
Ceiling-mounted unit
(a)
m [kg]
A
min
[m
2
]
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
4.4 165
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
8 40.5
8.2 42.6
8.4 44.7
8.6 46.8
8.8 49.0
9 51.3
9.2 53.6
9.4 55.9
9.55 57.7
8 60.5
8.2 63.6
8.4 66.7
8.6 69.9
8.8 73.2
9 76.6
9.2 80.0
9.4 83.6
9.55 86.2
8 545
8.2 572
8.4 601
8.6 629
8.8 659
9 689
9.2 720
9.4 752
9.55 776
Wall-mounted
unit
(b)
m (kg)
A
min
(m2)
Floor-standing
unit
(c)
m (kg)
A
min
(m2)
Installer reference guide
10
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)
2.2.3 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).
RXJ-M(9)_RXA-A(9)_RXM-R(9)_ARXM-R(9)
R32 Split system air conditioners
4P519439-12M – 2021.02
2 | General safety precautions
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: Selfcombustion and explosion of the compressor because of air going into the
operating compressor.
▪ Use a separate recovery system so that the unit's compressor does NOT have to
operate.
WARNING
ALWAYS recover the refrigerant. Do NOT release them directly into the environment.
Use a vacuum pump to evacuate the installation.
NOTICE
After all the piping has been connected, make sure there is no gas leak. Use nitrogen
to perform a gas leak detection.
NOTICE
▪ To avoid compressor breakdown, do NOT charge more than the specified amount
of refrigerant.
▪ When the refrigerant system is to be opened, refrigerant MUST be treated
according to the applicable legislation.
WARNING
Make sure there is no oxygen in the system. Refrigerant may only be charged after
performing the leak test and the vacuum drying.
Possible consequence: Self-combustion and explosion of the compressor because of
oxygen going into the operating compressor.
▪ In case recharge is required, see the nameplate of the unit. It states the type of
refrigerant and necessary amount.
▪ The unit is factory charged with refrigerant and depending on pipe sizes and pipe
lengths some systems require additional charging of refrigerant.
▪ Only use tools exclusively for the refrigerant type used in the system, this to
ensure pressure resistance and prevent foreign materials from entering into the
system.
RXJ-M(9)_RXA-A(9)_RXM-R(9)_ARXM-R(9)
R32 Split system air conditioners
4P519439-12M – 2021.02
▪ Charge the liquid refrigerant as follows:
Installer reference guide
11
2 | General safety precautions
If Then
A siphon tube is present
Charge with the cylinder upright.
(i.e., the cylinder is marked with "Liquid
filling siphon attached")
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.
2.2.4 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 10minutes, and measure the voltage
at the terminals of main circuit capacitors or electrical components before
servicing. The voltage MUST be less than 50VDC 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
categoryIII condition, MUST be installed in the fixed wiring.
Installer reference guide
12
RXJ-M(9)_RXA-A(9)_RXM-R(9)_ARXM-R(9)
R32 Split system air conditioners
4P519439-12M – 2021.02
2 | General safety precautions
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.
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.
RXJ-M(9)_RXA-A(9)_RXM-R(9)_ARXM-R(9)
R32 Split system air conditioners
4P519439-12M – 2021.02
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.
Installer reference guide
13
2 | General safety precautions
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.
Installer reference guide
14
RXJ-M(9)_RXA-A(9)_RXM-R(9)_ARXM-R(9)
R32 Split system air conditioners
4P519439-12M – 2021.02
3 | Specific installer safety instructions
3 Specific installer safety instructions
Always observe the following safety instructions and regulations.
Unit installation (see
"6Unit installation"[425]
WARNING
Installation shall be done by an installer, the choice of materials and installation shall
comply with the applicable legislation. In Europe, EN378 is the applicable standard.
Installation site (see
"6.1Preparing the installation site"[425]
CAUTION
▪ Check if the installation location can support the unit's weight. Poor installation is
hazardous. It can also cause vibrations or unusual operating noise.
▪ Provide sufficient service space.
▪ Do NOT install the unit so that it is in contact with a ceiling or a wall, as this may
cause vibrations.
WARNING
The appliance shall be stored in a room without continuously operating ignition
sources (example: open flames, an operating gas appliance or an operating electric
heater).
Opening and closing the unit (see
)
)
"6.2Opening and closing the unit"[429]
)
DANGER: RISK OF ELECTROCUTION
Do NOT leave the unit unattended when the service cover is removed.
DANGER: RISK OF BURNING/SCALDING
DANGER: RISK OF ELECTROCUTION
Connecting the refrigerant piping (see
piping"[434]
)
CAUTION
▪ No brazing or welding on site for units with R32 refrigerant charge during
shipment.
▪ During installation of the refrigeration system, joining of parts with at least one
part charged shall be performed taking into account the following requirements:
inside occupied spaces non permanent joints are not allowed for R32 refrigerant
except for site made joints directly connecting the indoor unit to piping. Site
made joints directly connecting piping to indoor units shall be of non permanent
type.
"7.2Connecting the refrigerant
RXJ-M(9)_RXA-A(9)_RXM-R(9)_ARXM-R(9)
R32 Split system air conditioners
4P519439-12M – 2021.02
Installer reference guide
15
3 | Specific installer safety instructions
CAUTION
▪ Use the flare nut fixed to the unit.
▪ To prevent gas leakage, apply refrigeration oil only to the inside of the flare. Use
refrigeration oil for R32.
▪ Do NOT reuse joints.
CAUTION
▪ Do NOT use mineral oil on flared part.
▪ Do NOT reuse piping from previous installations.
▪ NEVER install a drier to this R32 unit to guarantee its lifetime. The drying material
may dissolve and damage the system.
WARNING
Connect the refrigerant piping securely before running the compressor. If the
refrigerant piping is NOT connected and the stop valve is open when the compressor
is run, air will be sucked in. This will cause abnormal pressure in the refrigeration
cycle, which may result in equipment damage and even injury.
CAUTION
▪ Incomplete flaring may cause refrigerant gas leakage.
▪ Do NOT re-use flares. Use new flares to prevent refrigerant gas leakage.
▪ Use flare nuts that are included with the unit. Using different flare nuts may
cause refrigerant gas leakage.
CAUTION
Do NOT open the valves before flaring is complete. This would cause refrigerant gas
leakage.
DANGER: RISK OF EXPLOSION
Do NOT start the unit if it is vacuumed.
Charging refrigerant (see
WARNING
The refrigerant inside the unit is mildly flammable, but normally does NOT leak. If the
refrigerant leaks in the room and comes in contact with fire from a burner, a heater,
or a cooker, this may result in fire, or the formation of a harmful gas.
Turn off any combustible heating devices, ventilate the room, and contact the dealer
where you purchased the unit.
Do NOT use the unit until a service person confirms that the part from which the
refrigerant leaked has been repaired.
"8Charging refrigerant"[443]
)
Installer reference guide
16
WARNING
▪ Only use R32 as refrigerant. Other substances may cause explosions and
accidents.
▪ R32 contains fluorinated greenhouse gases. Its global warming potential (GWP)
value is 675. Do NOT vent these gases into the atmosphere.
▪ When charging refrigerant, ALWAYS use protective gloves and safety glasses.
RXJ-M(9)_RXA-A(9)_RXM-R(9)_ARXM-R(9)
R32 Split system air conditioners
4P519439-12M – 2021.02
3 | Specific installer safety instructions
CAUTION
To avoid compressor breakdown, do NOT charge more than the specified amount of
refrigerant.
WARNING
NEVER directly touch any accidental leaking refrigerant. This could result in severe
wounds caused by frostbite.
Electrical installation (see
WARNING
Appliance shall be installed in accordance with national wiring regulations.
WARNING
▪ All wiring MUST be performed by an authorised electrician and MUST comply
with the applicable legislation.
▪ Make electrical connections to the fixed wiring.
▪ All components procured on-site and all electrical construction MUST comply
with the applicable legislation.
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 shock.
▪ Install the required fuses or circuit breakers.
▪ Secure the electrical wiring with cable ties so that the cables do NOT come in
contact with sharp edges or piping, particularly on the high-pressure side.
▪ Do NOT use taped wires, stranded conductor wires, extension cords, or
connections from a star system. They can cause overheating, electrical shock or
fire.
▪ Do NOT install a phase advancing capacitor, because this unit is equipped with an
inverter. A phase advancing capacitor will reduce performance and may cause
accidents.
"9Electrical installation"[447]
)
RXJ-M(9)_RXA-A(9)_RXM-R(9)_ARXM-R(9)
R32 Split system air conditioners
4P519439-12M – 2021.02
WARNING
ALWAYS use multicore cable for power supply cables.
WARNING
Use an all-pole disconnection type breaker with at least 3mm between the contact
point gaps that provide full disconnection under overvoltage category III.
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
Do NOT connect the power supply to the indoor unit. This could result in electrical
shock or fire.
Installer reference guide
17
3 | Specific installer safety instructions
WARNING
▪ Do NOT use locally purchased electrical parts inside the product.
▪ Do NOT branch the power supply for the drain pump, etc. from the terminal
block. This could result in electrical shock or fire.
WARNING
Keep the interconnection wiring away from copper pipes without thermal insulation
as such pipes will be very hot.
DANGER: RISK OF ELECTROCUTION
All electrical parts (including thermistors) are powered by the power supply. Do not
touch them with bare hands.
DANGER: RISK OF ELECTROCUTION
Disconnect the power supply for more than 10minutes, and measure the voltage at
the terminals of main circuit capacitors or electrical components before servicing.
The voltage MUST be less than 50VDC before you can touch electrical components.
For the location of the terminals, see the wiring diagram.
Finishing indoor unit installation (see
installation"[452]
)
DANGER: RISK OF ELECTROCUTION
▪ Make sure that the system is earthed properly.
▪ Turn off the power supply before servicing.
▪ Install the switch box cover before turning on the power supply.
Configuration (see
"11Configuration"[453]
WARNING
Before connecting or disconnecting the connector, make sure the power supply is
turned off.
Commissioning (see
"12Commissioning"[455]
DANGER: RISK OF ELECTROCUTION
DANGER: RISK OF BURNING/SCALDING
"10Finishing the outdoor unit
)
)
Installer reference guide
18
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.
RXJ-M(9)_RXA-A(9)_RXM-R(9)_ARXM-R(9)
R32 Split system air conditioners
4P519439-12M – 2021.02
3 | Specific installer safety instructions
CAUTION
Do NOT insert fingers, rods or other objects into the air inlet or outlet. Do NOT
remove the fan guard. When the fan is rotating at high speed, it will cause injury.
Maintenance and service (see
DANGER: RISK OF ELECTROCUTION
DANGER: RISK OF BURNING/SCALDING
WARNING
▪ Before carrying out any maintenance or repair activity, ALWAYS switch off the
circuit breaker on the supply panel, remove the fuses or open the protection
devices of the unit.
▪ Do NOT touch live parts for 10 minutes after the power supply is turned off
because of high voltage risk.
▪ Please note that some sections of the electric component box are hot.
▪ Make sure you do NOT touch a conductive section.
▪ Do NOT rinse the unit. This may cause electric shocks or fire.
DANGER: RISK OF ELECTROCUTION
▪ Use this compressor on a grounded system only.
▪ Turn the power off before servicing the compressor.
▪ Reattach the switch box cover and service lid after servicing.
"14Maintenance and service"[459]
)
CAUTION
Always wear safety goggles and protective gloves.
DANGER: RISK OF EXPLOSION
▪ Use a pipe cutter to remove the compressor.
▪ Do NOT use the brazing torch.
▪ Use approved refrigerants and lubricants only.
DANGER: RISK OF BURNING/SCALDING
Do NOT touch the compressor with bare hands.
Troubleshooting (see
DANGER: RISK OF ELECTROCUTION
DANGER: RISK OF BURNING/SCALDING
"15Troubleshooting"[461]
)
RXJ-M(9)_RXA-A(9)_RXM-R(9)_ARXM-R(9)
R32 Split system air conditioners
4P519439-12M – 2021.02
Installer reference guide
19
3 | Specific installer safety instructions
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.
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.
DANGER: RISK OF ELECTROCUTION
▪ When the unit is not operating, the LEDs on the PCB are turned off in order to
save power.
▪ Even when the LEDs are off, the terminal block and the PCB may be powered.
Installer reference guide
20
RXJ-M(9)_RXA-A(9)_RXM-R(9)_ARXM-R(9)
R32 Split system air conditioners
4P519439-12M – 2021.02
4 About the box
4.1 Overview: About the box
This chapter describes what you have to do after the box with the outdoor unit is
delivered on-site.
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.
▪ When handling the unit, take into account the following:
Fragile, handle the unit with care.
Keep the unit upright in order to avoid damage.
4 | About the box
4.2 Outdoor unit
4.2.1 To unpack the outdoor unit
Keep the unit away from rain or damp conditions.
At least 2persons MUST handle the box with the unit.
RXJ-M(9)_RXA-A(9)_RXM-R(9)_ARXM-R(9)
R32 Split system air conditioners
4P519439-12M – 2021.02
Installer reference guide
21
Loading...