Daikin Sky Air Alpha Series How to use

Installer reference guide
Sky Air Alpha-series
RZAG71N2V1B
RZAG100N2V1B
RZAG125N2V1B
RZAG140N2V1B
RZAG71N2Y1B
RZAG100N2Y1B
RZAG125N2Y1B
RZAG140N2Y1B

Table of contents
Installer reference guide
2
RZAG71~140N2V1+Y1
Sky Air Alpha-series
4P695307-1 – 2022.05
Table of contents
1 About this document 4
1.1 Meaning of warnings and symbols................................................................................................................................. 4
1.2 Installer reference guide at a glance .............................................................................................................................. 5
2 General safety precautions 7
2.1 For the installer............................................................................................................................................................... 7
2.1.1 General ........................................................................................................................................................... 7
2.1.2 Installation site ............................................................................................................................................... 8
2.1.3 Refrigerant — in case of R410A or R32.......................................................................................................... 10
2.1.4 Brine................................................................................................................................................................ 12
2.1.5 Water .............................................................................................................................................................. 12
2.1.6 Electrical ......................................................................................................................................................... 13
2.1.7 Gas .................................................................................................................................................................. 14
2.1.8 Gas exhaust..................................................................................................................................................... 15
2.1.9 Local legislation .............................................................................................................................................. 15
3 Specific installer safety instructions 17
4 About the box 22
4.1 Outdoor unit ................................................................................................................................................................... 22
4.1.1 To unpack the outdoor unit ........................................................................................................................... 22
4.1.2 To handle the outdoor unit............................................................................................................................ 22
4.1.3 To remove the accessories from the outdoor unit........................................................................................ 23
5 About the units and options 24
5.1 Overview: About the units and options.......................................................................................................................... 24
5.2 Identification ................................................................................................................................................................... 24
5.2.1 Identification label: Outdoor unit .................................................................................................................. 24
5.3 Combining units and options.......................................................................................................................................... 24
5.3.1 Possible options for the outdoor unit............................................................................................................ 25
6 Preparation 26
6.1 Overview: Preparation.................................................................................................................................................... 26
6.2 Preparing the installation site......................................................................................................................................... 26
6.2.1 Installation site requirements of the outdoor unit........................................................................................ 26
6.2.2 Additional installation site requirements of the outdoor unit in cold climates............................................ 29
6.3 Preparing refrigerant piping ........................................................................................................................................... 29
6.3.1 Refrigerant piping requirements.................................................................................................................... 29
6.3.2 Refrigerant piping insulation.......................................................................................................................... 32
6.4 Preparing electrical wiring .............................................................................................................................................. 33
6.4.1 About preparing electrical wiring................................................................................................................... 33
7 Installation 34
7.1 Overview: Installation ..................................................................................................................................................... 34
7.2 Opening the units ........................................................................................................................................................... 34
7.2.1 About opening the units................................................................................................................................. 34
7.2.2 To open the outdoor unit............................................................................................................................... 34
7.3 Mounting the outdoor unit............................................................................................................................................. 35
7.3.1 About mounting the outdoor unit ................................................................................................................. 35
7.3.2 Precautions when mounting the outdoor unit.............................................................................................. 35
7.3.3 To provide the installation structure ............................................................................................................. 35
7.3.4 To install the outdoor unit ............................................................................................................................. 36
7.3.5 To provide drainage........................................................................................................................................ 36
7.3.6 To prevent the outdoor unit from falling over .............................................................................................. 38
7.4 Connecting the refrigerant piping .................................................................................................................................. 39
7.4.1 About connecting the refrigerant piping ....................................................................................................... 39
7.4.2 Precautions when connecting the refrigerant piping.................................................................................... 39
7.4.3 Guidelines when connecting the refrigerant piping...................................................................................... 40
7.4.4 Pipe bending guidelines ................................................................................................................................. 41
7.4.5 To flare the pipe end ...................................................................................................................................... 41
7.4.6 To braze the pipe end..................................................................................................................................... 42
7.4.7 Using the stop valve and service port............................................................................................................ 42
7.4.8 To connect the refrigerant piping to the outdoor unit ................................................................................. 44
7.5 Checking the refrigerant piping...................................................................................................................................... 46
7.5.1 About checking the refrigerant piping........................................................................................................... 46
7.5.2 Precautions when checking the refrigerant piping........................................................................................ 47

Table of contents
Installer reference guide
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4P695307-1 – 2022.05
7.5.3 Checking refrigerant piping: Setup ................................................................................................................ 47
7.5.4 To check for leaks ........................................................................................................................................... 48
7.5.5 To perform vacuum drying............................................................................................................................. 48
7.6 Charging refrigerant........................................................................................................................................................ 49
7.6.1 About charging refrigerant............................................................................................................................. 49
7.6.2 About the refrigerant ..................................................................................................................................... 51
7.6.3 Precautions when charging refrigerant ......................................................................................................... 51
7.6.4 Definitions: L1~L7, H1, H2.............................................................................................................................. 51
7.6.5 Charging additional refrigerant...................................................................................................................... 52
7.6.6 Completely recharging refrigerant................................................................................................................. 55
7.6.7 To fix the fluorinated greenhouse gases label............................................................................................... 57
7.7 Connecting the electrical wiring..................................................................................................................................... 58
7.7.1 About connecting the electrical wiring.......................................................................................................... 58
7.7.2 About electrical compliance........................................................................................................................... 58
7.7.3 Precautions when connecting the electrical wiring....................................................................................... 58
7.7.4 Guidelines when connecting the electrical wiring......................................................................................... 59
7.7.5 Specifications of standard wiring components.............................................................................................. 60
7.7.6 To connect the electrical wiring to the outdoor unit .................................................................................... 60
7.8 Finishing the outdoor unit installation ........................................................................................................................... 63
7.8.1 To finish the outdoor unit installation ........................................................................................................... 63
7.8.2 To close the outdoor unit............................................................................................................................... 64
7.8.3 To check the insulation resistance of the compressor.................................................................................. 64
8 Commissioning 65
8.1 Overview: Commissioning .............................................................................................................................................. 65
8.2 Precautions when commissioning.................................................................................................................................. 65
8.3 Checklist before commissioning..................................................................................................................................... 66
8.4 To perform a test run...................................................................................................................................................... 66
8.5 Error codes when performing a test run........................................................................................................................ 68
8.6 Dedicated field settings for technical cooling ................................................................................................................ 69
9 Hand-over to the user 70
10 Maintenance and service 71
10.1 Overview: Maintenance and service .............................................................................................................................. 71
10.2 Maintenance safety precautions.................................................................................................................................... 71
10.2.1 To prevent electrical hazards ......................................................................................................................... 71
10.3 Checklist for yearly maintenance of the outdoor unit................................................................................................... 72
11 Troubleshooting 73
11.1 Overview: Troubleshooting ............................................................................................................................................ 73
11.2 Precautions when troubleshooting ................................................................................................................................ 73
12 Disposal 75
12.1 Overview: Disposal.......................................................................................................................................................... 75
12.2 About pump down .......................................................................................................................................................... 75
12.3 To pump down ................................................................................................................................................................ 75
13 Technical data 77
13.1 Overview: Technical data................................................................................................................................................ 77
13.2 Service space: Outdoor unit ........................................................................................................................................... 77
13.3 Piping diagram: Outdoor unit ......................................................................................................................................... 79
13.4 Wiring diagram: Outdoor unit ........................................................................................................................................ 80
13.5 Eco Design requirements................................................................................................................................................ 83
14 Glossary 84

1 | About this document
Installer reference guide
4
RZAG71~140N2V1+Y1
Sky Air Alpha-series
4P695307-1 – 2022.05
1 About this document
Target audience
Authorised installers
INFORMATION
This appliance is intended to be used by expert or trained users in shops, in light
industry and on farms, or for commercial use by lay persons.
Documentation set
This document is part of a documentation set. The complete set consists of:
▪General safety precautions:
-Safety instructions that you MUST read before installing
-Format: Paper (in the box of the outdoor unit)
▪Outdoor unit installation 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 https://www.daikin.eu. Use the search function to
find your model.
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).
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.

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Installer reference guide
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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:
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 Installer reference guide at a glance
Chapter Description
General safety precautions Safety instructions that you must read before
installing
About the documentation What documentation exists for the installer
About the box How to unpack the units and remove their
accessories

1 | About this document
Installer reference guide
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RZAG71~140N2V1+Y1
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4P695307-1 – 2022.05
Chapter Description
About the units and options ▪How to identify the units
▪Possible combinations of units and options
Preparation What to do and know before going on‑site
Installation What to do and know to install the system
Commissioning What to do and know to commission the system
after it is installed
Hand‑over to the user What to give and explain to the user
Maintenance and service How to maintain and service the units
Troubleshooting What to do in case of problems
Disposal How to dispose of the system
Technical data Specifications of the system
Glossary Definition of terms

2 | General safety precautions
Installer reference guide
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2 General safety precautions
2.1 For the installer
2.1.1 General
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).
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
Wear adequate personal protective equipment (protective gloves, safety glasses,…)
when installing, maintaining or servicing the system.
CAUTION
Do NOT touch the air inlet or aluminium fins of the unit.
CAUTION
▪Do NOT place any objects or equipment on top of the unit.
▪Do NOT sit, climb or stand on the unit.
If you are NOT sure how to install or operate the unit, contact your dealer.
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:

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▪Instructions for shutting down the system in case of an emergency
▪Name and address of fire department, police and hospital
▪Name, address and day and night telephone numbers for obtaining service
In Europe, EN378 provides the necessary guidance for this logbook.
2.1.2 Installation site
▪Provide sufficient space around the unit for servicing and air circulation.
▪Make sure the installation site withstands the weight and vibration of the unit.
▪Make sure the area is well ventilated. Do NOT block any ventilation openings.
▪Make sure the unit is level.
Do NOT install the unit in the following places:
▪In potentially explosive atmospheres.
▪In places where there is machinery that emits electromagnetic waves.
Electromagnetic waves may disturb the control system, and cause malfunction of
the equipment.
▪In places where there is a risk of fire due to the leakage of flammable gases
(example: thinner or gasoline), carbon fibre, ignitable dust.
▪In places where corrosive gas (example: sulphurous acid gas) is produced.
Corrosion of copper pipes or soldered parts may cause the refrigerant to leak.
Instructions for equipment using R32 refrigerant
WARNING: FLAMMABLE MATERIAL
The refrigerant inside this unit is mildly flammable.
WARNING
▪Do NOT pierce or burn refrigerant cycle parts.
▪Do NOT use cleaning materials or means to accelerate the defrosting process
other than those recommended by the manufacturer.
▪Be aware that the refrigerant inside the system is odourless.
WARNING
Make sure installation, servicing, maintenance and repair comply with instructions
from Daikin and with applicable legislation and are executed ONLY by authorised
persons.
CAUTION
Do NOT use potential sources of ignition in searching for or detection of refrigerant
leaks.

2 | General safety precautions
Installer reference guide
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NOTICE
▪Take precautions to avoid excessive vibration or pulsation to refrigeration piping.
▪Protect the protection devices, piping and fittings as much as possible against
adverse environmental effects.
▪Provide space for expansion and contraction of long runs of piping.
▪Design and install piping in refrigerating systems such as to minimise the
likelihood of hydraulic shock damaging the system.
▪Mount the indoor equipment and pipes securely and protect them to avoid
accidental rupture of equipment or pipes in case of events such as moving
furniture or reconstruction activities.
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.
Installation space requirements
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
▪Protect pipework from physical damage.
▪Keep the pipework installation to a minimum.
To determine the minimum floor area
1Determine the total refrigerant charge in the system (= factory refrigerant
charge + additional refrigerant amount charged).
Contains fluorinated greenhouse gases
2
11
1
2
2kg
tCO
2
eq
1000
GWP × kg
=
=
+
kg
=
kg
=
GWP: xxx
R32
2Determine 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…
<1.8m Floor-standing units
1.8≤x<2.2m Wall-mounted units
≥2.2m Ceiling-mounted units

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3Use the graph or table to determine the minimum floor area.
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]
Amin [m2]
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) Amin (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) Amin (m2)
Floor-standing
unit(c)
m (kg) Amin (m2)
mTotal refrigerant charge in the system
Amin Minimum floor area
(a) Ceiling-mounted unit (= Ceiling-mounted unit)
(b) Wall-mounted unit (= Wall-mounted unit)
(c) Floor-standing unit (= Floor-standing unit)
2.1.3 Refrigerant — in case of R410A or R32
If applicable. See the installation manual or installer reference guide of your
application for more information.
DANGER: RISK OF EXPLOSION
Pump down – Refrigerant leakage. If you want to pump down the system, and there
is a leak in the refrigerant circuit:
▪Do NOT use the unit's automatic pump down function, with which you can collect
all refrigerant from the system into the outdoor unit. Possible consequence: Self-
combustion and explosion of the compressor because of air going into the
operating compressor.
▪Use a separate recovery system so that the unit's compressor does NOT have to
operate.

2 | General safety precautions
Installer reference guide
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WARNING
During tests, NEVER pressurise the product with a pressure higher than the
maximum allowable pressure (as indicated on the nameplate of the unit).
WARNING
Take sufficient precautions in case of refrigerant leakage. If refrigerant gas leaks,
ventilate the area immediately. Possible risks:
▪Excessive refrigerant concentrations in a closed room can lead to oxygen
deficiency.
▪Toxic gas might be produced if refrigerant gas comes into contact with fire.
WARNING
ALWAYS recover the refrigerant. Do NOT release them directly into the environment.
Use a vacuum pump to evacuate the installation.
WARNING
Make sure there is no oxygen in the system. Refrigerant may ONLY be charged after
performing the leak test and the vacuum drying.
Possible consequence: Self-combustion and explosion of the compressor because of
oxygen going into the operating compressor.
NOTICE
▪To avoid compressor breakdown, do NOT charge more than the specified amount
of refrigerant.
▪When the refrigerant system is to be opened, refrigerant MUST be treated
according to the applicable legislation.
NOTICE
Make sure refrigerant piping installation complies with applicable legislation. In
Europe, EN378 is the applicable standard.
NOTICE
Make sure the field piping and connections are NOT subjected to stress.
NOTICE
After all the piping has been connected, make sure there is no gas leak. Use nitrogen
to perform a gas leak detection.
▪In case recharge is required, see the nameplate 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:

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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.
2.1.4 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.
2.1.5 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 2020/2184.

2 | General safety precautions
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2.1.6 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 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.
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.
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.

2 | General safety precautions
Installer reference guide
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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.
Install power cables at least 1 meter away from televisions or radios to prevent
interference. Depending on the radio waves, a distance of 1 meter may NOT be
sufficient.
NOTICE
ONLY applicable if the power supply is three‑phase, and the compressor has an ON/
OFF starting method.
If there exists the possibility of reversed phase after a momentary black out and the
power goes ON and OFF while the product is operating, attach a reversed phase
protection circuit locally. Running the product in reversed phase can break the
compressor and other parts.
2.1.7 Gas
The gas boiler is factory‑set to:
▪the type of gas quoted on the type identification plate or on the setting type
identification plate,
▪the gas pressure quoted on the type identification plate.
Operate the unit ONLY with the gas type and gas pressure indicated on these type
identification plates.
Installation and adaptation of the gas system MUST be conducted by:
▪personnel qualified for this work,
▪in compliance with valid gas installation related guidelines,
▪in accordance with applicable regulations of the gas supply company,
▪In accordance with local and national regulations.
Boilers that use natural gas MUST be connected to a governed meter.
Boilers that use liquid petroleum gas (LPG) MUST be connected to a regulator.
The size of the gas supply pipe should under no circumstance be less than 22mm.
The meter or regulator and pipe work to the meter MUST be checked preferably by
the gas supplier. This is to ensure that the equipment works good and meets the
gas flow and pressure requirements.

2 | General safety precautions
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DANGER
If you smell gas:
▪call immediately your local gas supplier and your installer,
▪call the suppliers's number on the side of the LPG tank (if applicable),
▪turn off the emergency control valve at the meter/regulator,
▪do NOT turn electrical switches ON or OFF,
▪do NOT strike matches or smoke,
▪put out naked flames,
▪open doors and windows immediately,
▪keep people away from the affected area.
2.1.8 Gas exhaust
Flue systems must NOT be modified or installed in any way other than as described
in the fitting instructions. Any misuses or unauthorized modifications to the
appliance, flue or associated components and systems could invalidate the
warranty. The manufacturer accepts no liability arising from any such actions,
excluding statutory rights.
It is NOT allowed to combine flue system parts purchased from different suppliers.
2.1.9 Local legislation
See the local and national regulations.
Local regulations for UK
It is law that all gas appliances are installed by a gas safe registered competent
engineer and in accordance with the following recommendations:
▪Current Gas Safety (Installation and Use) Regulations
▪All current building regulations
▪Building Standards (Scotland) Consolidated
▪This appliance MUST be installed in accordance with the Gas (Safety and Use)
Regulations, current Building Regulations, Building Standards (Scotland), I.S.813
Installation of Gas Appliances (Ireland), IEE Wiring Regulations (BS 7671), Health
and Safety Document No. 635 (Electricity at Work Regulations) and Local Water
Authority Bye Laws
▪UK Water Regulations and Bye Laws
▪Health & Safety
The installation MUST comply with the following British Standards codes of
practice:
▪BS 5440-1: 2008 Flueing and ventilation for gas appliances of rated input not
exceeding 70kW net (1st, 2nd and 3rd family gases)
▪BS 5440-2: 2009 Flueing and ventilation for gas appliances of rated input not
exceeding 70kW net (1st, 2nd and 3rd family gases)
▪BS 5546: 2010 Specification for installation and maintenance of gas-fired water-
heating appliances of rated input not exceeding 70kW net
▪BS 5549: 1990 Forced circulation hot water systems.

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▪BS 6700: 2006 + A1: 2009 Design, installation, testing and maintenance of
services supplying water for domestic use within buildings and their curtilages -
Specification
▪BS 6798: 2014 Specification for selection, installation, inspection, commissioning,
servicing and maintenance of gas-fired boilers of rated input not exceeding
70kW net
▪BS 6891: 2015 Specification for the installation and maintenance of low pressure
gas installation pipework of up to 35mm (R1¼) on premises
▪BS 7593: 2006 Code of practice for treatment of water in domestic hot water
space heating systems
▪BS 7671: 2018 Requirements for electrical installations. IET wiring regulations
▪BS 7074: 1 Code of practice for domestic and hot water supply
▪EN12828: 2014 Space heating for domestic premises
Potable water: all seals, joints and compounds (including flux and solder) and
components used as part of the secondary domestic water system MUST be
approved by WRAS.

3 | Specific installer safety instructions
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3 Specific installer safety instructions
Always observe the following safety instructions and regulations.
Installation site (see "6.2Preparing the installation site"[ 4
26])
WARNING
Follow the service space dimensions in this manual for correct installation of the unit.
See "13.2Service space: Outdoor unit"[477].
WARNING
Tear apart and throw away plastic packaging bags so that nobody, especially
children, can play with them. Possible risk: suffocation.
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.
CAUTION
This equipment is NOT intended for use in residential locations and will NOT
guarantee to provide adequate protection to radio reception in such locations.
CAUTION
Excessive refrigerant concentrations in a closed room can lead to oxygen deficiency.
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)
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.

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Opening the unit (see "7.2Opening the units"[ 4
34])
DANGER: RISK OF BURNING/SCALDING
DANGER: RISK OF ELECTROCUTION
DANGER: RISK OF ELECTROCUTION
Do NOT leave the unit unattended when the service cover is removed.
Mounting the outdoor unit (see "7.3Mounting the outdoor unit"[ 4
35])
WARNING
Fixing method of the outdoor unit MUST be in accordance with the instructions from
this manual. See "7.3Mounting the outdoor unit"[435].
Connecting the refrigerant piping (see "7.4Connecting the refrigerant
piping"[
4
39])
WARNING
The field piping method MUST be in accordance with the instructions from this
manual. See "7.4Connecting the refrigerant piping"[439].
NOTICE
▪Do NOT use mineral oil on flared part.
▪Do NOT reuse piping from previous installations.
▪NEVER install a drier to this unit to guarantee its lifetime. The drying material may
dissolve and damage the system.
CAUTION
Install the refrigerant piping or components in a position where they are unlikely to
be exposed to any substance which may corrode components containing refrigerant,
unless the components are constructed of materials that are inherently resistant to
corrosion or are suitably protected against corrosion.
WARNING
Take sufficient precautions in case of refrigerant leakage. If refrigerant gas leaks,
ventilate the area immediately. Possible risks:
▪Excessive refrigerant concentrations in a closed room can lead to oxygen
deficiency.
▪Toxic gas might be produced if refrigerant gas comes into contact with fire.
WARNING
ALWAYS recover the refrigerant. Do NOT release them directly into the environment.
Use a vacuum pump to evacuate the installation.

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WARNING
During tests, NEVER pressurise the product with a pressure higher than the
maximum allowable pressure (as indicated on the nameplate of the unit).
CAUTION
Do NOT vent gases into the atmosphere.
WARNING
Any gas or oil remaining inside the stop valve may blow off the pinched piping.
Failure to observe the instructions in procedure below properly may result in
property damage or personal injury, which may be serious depending on the
circumstances.
WARNING
NEVER remove the pinched piping by brazing.
Any gas or oil remaining inside the stop valve may blow off the pinched piping.
Charging refrigerant (see "7.6Charging refrigerant"[ 4
49])
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.
WARNING
Charging of refrigerant MUST be in accordance with the instructions from this
manual. See "7.6Charging refrigerant"[449].
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.

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Electrical installation (see "7.7Connecting the electrical wiring"[ 4
58])
WARNING
Electrical wiring connection method MUST be in accordance with the instructions
from:
▪This manual. See "7.7Connecting the electrical wiring"[458].
▪The wiring diagram of the outdoor unit, which is delivered with the unit, located
on the inside of the top plate. For a translation of its legend, see "13.4 Wiring
diagram: Outdoor unit"[480].
CAUTION
Do NOT push or place redundant cable length into the unit.
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.
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 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
ALWAYS use multicore cable for power supply cables.