Daikin Sky Air Advance Series How to use

Installer reference guide
Sky Air Advance-series English
Installer reference guide
Sky Air Advance-series
RZA200D7Y1B
RZA250D7Y1B

Table of contents
Installer reference guide
2
RZA200+250D7Y1B
Sky Air Advance-series
4P573383-1 – 2019.04
Table of contents
1 General safety precautions 2
1.1 About the documentation .......................................................... 2
1.1.1 Meaning of warnings and symbols.............................. 3
1.2 For the installer.......................................................................... 3
1.2.1 General ....................................................................... 3
1.2.2 Installation site ............................................................ 3
1.2.3 Refrigerant .................................................................. 5
1.2.4 Brine............................................................................ 6
1.2.5 Water .......................................................................... 6
1.2.6 Electrical ..................................................................... 6
2 About the documentation 7
2.1 About this document.................................................................. 7
2.2 Installer reference guide at a glance ......................................... 7
3 About the box 7
3.1 Overview: About the box ........................................................... 7
3.2 Outdoor unit............................................................................... 7
3.2.1 To unpack the outdoor unit ......................................... 7
3.2.2 To handle the outdoor unit.......................................... 8
3.2.3 To remove the accessories from the outdoor unit....... 8
3.3 To remove the transportation stay............................................. 8
4 About the units and options 8
4.1 Overview: About the units and options...................................... 8
4.2 Identification .............................................................................. 8
4.2.1 Identification label: Outdoor unit ................................. 8
4.3 Combining units and options ..................................................... 9
4.3.1 Possible options for the outdoor unit........................... 9
5 Preparation 9
5.1 Overview: Preparation............................................................... 9
5.2 Preparing the installation site .................................................... 9
5.2.1 Installation site requirements of the outdoor unit ........ 9
5.2.2 Additional installation site requirements of the
outdoor unit in cold climates ....................................... 10
5.3 Preparing refrigerant piping....................................................... 10
5.3.1 Refrigerant piping requirements.................................. 10
5.3.2 Refrigerant piping insulation ....................................... 12
5.4 Preparing electrical wiring ......................................................... 12
5.4.1 About preparing electrical wiring................................. 12
6 Installation 13
6.1 Overview: Installation ................................................................ 13
6.2 Opening the units ...................................................................... 13
6.2.1 About opening the units .............................................. 13
6.2.2 To open the outdoor unit............................................. 13
6.3 Mounting the outdoor unit.......................................................... 13
6.3.1 About mounting the outdoor unit................................. 13
6.3.2 Precautions when mounting the outdoor unit.............. 13
6.3.3 To provide the installation structure............................ 13
6.3.4 To install the outdoor unit............................................ 14
6.3.5 To provide drainage.................................................... 14
6.3.6 To prevent the outdoor unit from falling over .............. 14
6.4 Connecting the refrigerant piping .............................................. 15
6.4.1 About connecting the refrigerant piping ...................... 15
6.4.2 Precautions when connecting the refrigerant piping... 15
6.4.3 Pipe bending guidelines.............................................. 15
6.4.4 To connect the refrigerant branching kit ..................... 15
6.4.5 To braze the pipe end................................................. 15
6.4.6 Using the stop valve and service port......................... 15
6.4.7 To remove the pinched pipes...................................... 16
6.4.8 To connect the refrigerant piping to the outdoor unit .. 17
6.5 Checking the refrigerant piping ................................................. 18
6.5.1 About checking the refrigerant piping ......................... 18
6.5.2 Precautions when checking the refrigerant piping ...... 18
6.5.3 Checking refrigerant piping: Setup............................... 19
6.5.4 To check for leaks........................................................ 19
6.5.5 To perform vacuum drying ........................................... 19
6.6 To insulate the refrigerant piping................................................ 19
6.7 Charging refrigerant ................................................................... 19
6.7.1 About charging refrigerant ........................................... 19
6.7.2 About the refrigerant .................................................... 20
6.7.3 Precautions when charging refrigerant ........................ 21
6.7.4 Definitions: L1~L7, H1, H2........................................... 21
6.7.5 Charging additional refrigerant..................................... 21
6.7.6 Completely recharging refrigerant................................ 22
6.7.7 To fix the fluorinated greenhouse gases label ............. 23
6.8 Connecting the electrical wiring.................................................. 23
6.8.1 About connecting the electrical wiring.......................... 23
6.8.2 About electrical compliance ......................................... 23
6.8.3 Precautions when connecting the electrical wiring ...... 23
6.8.4 Guidelines when connecting the electrical wiring ........ 23
6.8.5 Specifications of standard wiring components............. 24
6.8.6 To connect the electrical wiring on the outdoor unit..... 24
6.9 Finishing the outdoor unit installation ......................................... 25
6.9.1 To finish the outdoor unit installation ........................... 25
6.9.2 To close the outdoor unit ............................................. 25
6.9.3 To check the insulation resistance of the compressor. 25
7 Commissioning 26
7.1 Overview: Commissioning.......................................................... 26
7.2 Precautions when commissioning .............................................. 26
7.3 Checklist before commissioning................................................. 26
7.4 To perform a test run.................................................................. 26
7.5 Error codes when performing a test run ..................................... 27
8 Hand-over to the user 27
9 Maintenance and service 28
9.1 Overview: Maintenance and service .......................................... 28
9.2 Maintenance safety precautions................................................. 28
9.2.1 To prevent electrical hazards....................................... 28
9.3 Checklist for yearly maintenance of the outdoor unit ................. 28
10 Troubleshooting 28
10.1 Overview: Troubleshooting......................................................... 28
10.2 Precautions when troubleshooting ............................................. 29
11 Disposal 29
11.1 Overview: Disposal..................................................................... 29
11.2 About pump down ...................................................................... 29
11.3 To pump down............................................................................ 29
12 Technical data 30
12.1 Overview: Technical data ........................................................... 30
12.2 Service space: Outdoor unit ....................................................... 30
12.3 Piping diagram: Outdoor unit...................................................... 31
12.4 Wiring diagram: Outdoor unit ..................................................... 32
12.5 Information requirements for Eco Design................................... 33
13 Glossary 33
1 General safety precautions
1.1 About the documentation
▪ The original documentation is written in English. All other
languages are translations.
▪ The precautions described in this document cover very important
topics, follow them carefully.
▪ The installation of the system, and all activities described in the
installation manual and in the installer reference guide MUST be
performed by an authorised installer.

1 General safety precautions
Installer reference guide
3
RZA200+250D7Y1B
Sky Air Advance-series
4P573383-1 – 2019.04
1.1.1 Meaning of warnings and symbols
DANGER
Indicates a situation that results in death or serious injury.
DANGER: RISK OF ELECTROCUTION
Indicates a situation that could result in electrocution.
DANGER: RISK OF BURNING
Indicates a situation that could result in burning because of
extreme hot or cold temperatures.
DANGER: RISK OF EXPLOSION
Indicates a situation that could result in explosion.
WARNING
Indicates a situation that could result in death or serious
injury.
WARNING: FLAMMABLE MATERIAL
CAUTION
Indicates a situation that could result in minor or moderate
injury.
NOTICE
Indicates a situation that could result in equipment or
property damage.
INFORMATION
Indicates useful tips or additional information.
Symbol Explanation
Before installation, read the installation and
operation manual, and the wiring instruction sheet.
Before performing maintenance and service tasks,
read the service manual.
For more information, see the installer and user
reference guide.
1.2 For the installer
1.2.1 General
If you are NOT sure how to install or operate the unit, contact your
dealer.
NOTICE
Improper installation or attachment of equipment or
accessories could result in electric shock, short-circuit,
leaks, fire or other damage to the equipment. Only use
accessories, optional equipment and spare parts made or
approved by Daikin.
WARNING
Make sure installation, testing and applied materials
comply with applicable legislation (on top of the
instructions described in the Daikin documentation).
CAUTION
Wear adequate personal protective equipment (protective
gloves, safety glasses,…) when installing, maintaining or
servicing the system.
WARNING
Tear apart and throw away plastic packaging bags so that
nobody, especially children, can play with them. Possible
risk: suffocation.
DANGER: RISK OF BURNING
▪ Do NOT touch the refrigerant piping, water piping or
internal parts during and immediately after operation. It
could be too hot or too cold. Give it time to return to
normal temperature. If you must touch it, wear
protective gloves.
▪ Do NOT touch any accidental leaking refrigerant.
WARNING
Provide adequate measures to prevent that the unit can be
used as a shelter by small animals. Small animals that
make contact with electrical parts can cause malfunctions,
smoke or fire.
CAUTION
Do NOT touch the air inlet or aluminium fins of the unit.
NOTICE
▪ Do NOT place any objects or equipment on top of the
unit.
▪ Do NOT sit, climb or stand on the unit.
NOTICE
Works executed on the outdoor unit are best done under
dry weather conditions to avoid water ingress.
In accordance with the applicable legislation, it might be necessary
to provide a logbook with the product containing at least: information
on maintenance, repair work, results of tests, stand-by periods,…
Also, at least, following information MUST be provided at an
accessible place at the product:
▪ Instructions for shutting down the system in case of an emergency
▪ Name and address of fire department, police and hospital
▪ Name, address and day and night telephone numbers for
obtaining service
In Europe, EN378 provides the necessary guidance for this logbook.
1.2.2 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.

1 General safety precautions
Installer reference guide
4
RZA200+250D7Y1B
Sky Air Advance-series
4P573383-1 – 2019.04
Instructions for equipment using R32 refrigerant
If applicable.
WARNING
▪ Do NOT pierce or burn.
▪ Do NOT use means to accelerate the defrosting
process or to clean the equipment, other than those
recommended by the manufacturer.
▪ Be aware that R32 refrigerant does NOT contain an
odour.
WARNING
The appliance shall be stored so as to prevent mechanical
damage and in a well-ventilated room without continuously
operating ignition sources (example: open flames, an
operating gas appliance or an operating electric heater)
and have a room size as specified below.
NOTICE
▪ Do NOT re-use joints which have been used already.
▪ Joints made in installation between parts of refrigerant
system shall be accessible for maintenance purposes.
WARNING
Make sure installation, servicing, maintenance and repair
comply with instructions from Daikin and with applicable
legislation (for example national gas regulation) and are
executed only by authorised persons.
Installation space requirements
NOTICE
▪ Pipework shall be protected from physical damage.
▪ Installation of pipework shall be kept to a minimum.
WARNING
If appliances contain R32 refrigerant, the floor area of the
room in which the appliances are installed, operated and
stored MUST be larger than the minimum floor area
defined in table below A (m2). This applies to:
▪ Indoor units without a refrigerant leakage sensor; in
case of indoor units with refrigerant leakage sensor,
consult the installation manual
▪ Outdoor units installed or stored indoors (e.g. winter
garden, garage, machinery room)
▪ Pipework in unventilated spaces
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, and field piping
in unventilated spaces, this depends on the installation
height:
If the installation height is… Then use the graph or table for…
<1.8m Floor-standing units
1.8≤x<2.2m Wall-mounted units
≥2.2m Ceiling-mounted units
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
1.8
2
2.2
2.4
2.6
2.8
3
3.2
3.4
3.6
3.8
4
4.2
4.4
4.6
4.8
5
5.2
5.4
5.6
5.8
6
6.2
6.4
6.6
6.8
7
7.2
7.4
7.6
7.8
1.843 7.956
8.0
Amin (m2)
Floor-standing unit
(c)
Wall-mounted unit
(b)
Ceiling-mounted unit
(a)
m (kg)

1 General safety precautions
Installer reference guide
5
RZA200+250D7Y1B
Sky Air Advance-series
4P573383-1 – 2019.04
Ceiling-mounted
unit(a)
4.6 13.4 4.6 180
4.8 14.6 4.8 196
5.0 15.8 5.0 213
≤1.842 —
5.2 17.1
≤1.842 —
5.2 230
1.843 3.64
5.4 18.5
1.843 28.9
5.4 248
2.0 3.95
5.6 19.9
2.0 34.0
5.6 267
2.2 4.34
5.8 21.3
2.2 41.2
5.8 286
2.4 4.74
6.0 22.8
2.4 49.0
6.0 306
2.6 5.13
6.2 24.3
2.6 57.5
6.2 327
2.8 5.53
6.4 25.9
2.8 66.7
6.4 349
3.0 5.92
6.6 27.6
3.0 76.6
6.6 371
3.2 6.48
6.8 29.3
3.2 87.2
6.8 394
3.4 7.32
7.0 31.0
3.4 98.4
7.0 417
3.6 8.20
7.2 32.8
3.6 110
7.2 441
3.8 9.14
7.4 34.7
3.8 123
7.4 466
4.0 10.1
7.6 36.6
4.0 136
7.6 492
4.2 11.2
7.8 38.5
4.2 150
7.8 518
4.4 12.3
7.956 40.1
4.4 165
7.956 539
m (kg) 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
7.956 59.9
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)
1.2.3 Refrigerant
If applicable. See the installation manual or installer reference guide
of your application for more information.
NOTICE
Make sure refrigerant piping installation complies with
applicable legislation. In Europe, EN378 is the applicable
standard.
NOTICE
Make sure the field piping and connections are NOT
subjected to stress.
WARNING
During tests, NEVER pressurize the product with a
pressure higher than the maximum allowable pressure (as
indicated on the nameplate of the unit).
WARNING
Take sufficient precautions in case of refrigerant leakage. If
refrigerant gas leaks, ventilate the area immediately.
Possible risks:
▪ Excessive refrigerant concentrations in a closed room
can lead to oxygen deficiency.
▪ Toxic gas may be produced if refrigerant gas comes
into contact with fire.
DANGER: RISK OF EXPLOSION
Pump down – Refrigerant leakage. If you want to pump
down the system, and there is a leak in the refrigerant
circuit:
▪ Do NOT use the unit's automatic pump down function,
with which you can collect all refrigerant from the
system into the outdoor unit. Possible consequence:
Self-combustion and explosion of the compressor
because of air going into the operating compressor.
▪ Use a separate recovery system so that the unit's
compressor does NOT have to operate.
WARNING
ALWAYS recover the refrigerant. Do NOT release them
directly into the environment. Use a vacuum pump to
evacuate the installation.
NOTICE
After all the piping has been connected, make sure there is
no gas leak. Use nitrogen to perform a gas leak detection.
NOTICE
▪ To avoid compressor breakdown, do NOT charge more
than the specified amount of refrigerant.
▪ When the refrigerant system is to be opened,
refrigerant MUST be treated according to the applicable
legislation.
WARNING
Make sure there is no oxygen in the system. Refrigerant
may only be charged after performing the leak test and the
vacuum drying.
▪ In case recharge is required, see the nameplate of the unit. It
states the type of refrigerant and necessary amount.
▪ The unit is factory charged with refrigerant and depending on pipe
sizes and pipe lengths some systems require additional charging
of refrigerant.
▪ Only use tools exclusively for the refrigerant type used in the
system, this to ensure pressure resistance and prevent foreign
materials from entering into the system.
▪ Charge the liquid refrigerant as follows:
If Then
A siphon tube is present
(i.e., the cylinder is marked with
"Liquid filling siphon attached")
Charge with the cylinder upright.
A siphon tube is NOT present Charge with the cylinder upside
down.
▪ Open refrigerant cylinders slowly.
▪ Charge the refrigerant in liquid form. Adding it in gas form may
prevent normal operation.

1 General safety precautions
Installer reference guide
6
RZA200+250D7Y1B
Sky Air Advance-series
4P573383-1 – 2019.04
CAUTION
When the refrigerant charging procedure is done or when
pausing, close the valve of the refrigerant tank
immediately. If the valve is NOT closed immediately,
remaining pressure might charge additional refrigerant.
Possible consequence: Incorrect refrigerant amount.
1.2.4 Brine
If applicable. See the installation manual or installer reference guide
of your application for more information.
WARNING
The selection of the brine MUST be in accordance with the
applicable legislation.
WARNING
Take sufficient precautions in case of brine leakage. If
brine leaks, ventilate the area immediately and contact
your local dealer.
WARNING
The ambient temperature inside the unit can get much
higher than that of the room, e.g. 70°C. In case of a brine
leak, hot parts inside the unit can create a hazardous
situation.
WARNING
The use and installation of the application MUST comply
with the safety and environmental precautions specified in
the applicable legislation.
1.2.5 Water
If applicable. See the installation manual or installer reference guide
of your application for more information.
NOTICE
Make sure water quality complies with EU directive
98/83EC.
1.2.6 Electrical
DANGER: RISK OF ELECTROCUTION
▪ Turn OFF all power supply before removing the
switch box cover, connecting electrical wiring or
touching electrical parts.
▪ Disconnect the power supply for more than 1 minute,
and measure the voltage at the terminals of main circuit
capacitors or electrical components before servicing.
The voltage MUST be less than 50 V DC before you
can touch electrical components. For the location of the
terminals, see the wiring diagram.
▪ Do NOT touch electrical components with wet hands.
▪ Do NOT leave the unit unattended when the service
cover is removed.
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 electric shock or fire.
▪ When installing the earth leakage protector, make sure
it is compatible with the inverter (resistant to high
frequency electric noise) to avoid unnecessary opening
of the earth leakage protector.
CAUTION
When connecting the power supply, the earth connection
must be made before the current-carrying connections are
established. When disconnecting the power supply, the
current-carrying connections must be separated before the
earth connection is. The length of the conductors between
the power supply stress relief and the terminal block itself
must be as such that the current-carrying wires are
tautened before the earth wire is in case the power supply
is pulled loose from the stress relief.
NOTICE
Precautions when laying power wiring:
▪ Do NOT connect wiring of different thicknesses to the
power terminal block (slack in the power wiring may
cause abnormal heat).
▪ When connecting wiring which is the same thickness,
do as shown in the figure above.
▪ For wiring, use the designated power wire and connect
firmly, then secure to prevent outside pressure being
exerted on the terminal board.
▪ Use an appropriate screwdriver for tightening the
terminal screws. A screwdriver with a small head will
damage the head and make proper tightening
impossible.
▪ Over-tightening the terminal screws may break them.
WARNING
▪ After finishing the electrical work, confirm that each
electrical component and terminal inside the electrical
components box is connected securely.
▪ Make sure all covers are closed before starting up the
unit.

2 About the documentation
Installer reference guide
7
RZA200+250D7Y1B
Sky Air Advance-series
4P573383-1 – 2019.04
NOTICE
Only applicable if the power supply is three‑phase, and the
compressor has an ON/OFF starting method.
If there exists the possibility of reversed phase after a
momentary black out and the power goes on and off while
the product is operating, attach a reversed phase
protection circuit locally. Running the product in reversed
phase can break the compressor and other parts.
2 About the documentation
2.1 About this document
Target audience
Authorised installers
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 http://www.daikineurope.com/support-
and-manuals/product-information/
Latest revisions of the supplied documentation may be available on
the regional Daikin website or via your dealer.
The original documentation is written in English. All other languages
are translations.
Technical engineering data
▪ A subset of the latest technical data is available on the regional
Daikin website (publicly accessible).
▪ The full set of latest technical data is available on the Daikin
Business Portal (authentication required).
2.2 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
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
Chapter Description
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
3 About the box
3.1 Overview: About the box
This chapter describes what you have to do after the box with the
outdoor unit is delivered on-site.
It contains information about:
▪ Unpacking and handling the unit
▪ Removing the accessories from the unit
Keep the following in mind:
▪ At delivery, the unit MUST be checked for damage. Any damage
MUST be reported immediately to the claims agent of the carrier.
▪ Bring the packed unit as close as possible to its final installation
position to prevent damage during transport.
▪ Prepare the path along which you want to bring the unit inside in
advance.
3.2 Outdoor unit
3.2.1 To unpack the outdoor unit
21

4 About the units and options
Installer reference guide
8
RZA200+250D7Y1B
Sky Air Advance-series
4P573383-1 – 2019.04
3.2.2 To handle the outdoor unit
CAUTION
To avoid injury, do NOT touch the air inlet or aluminium
fins of the unit.
Carry the unit slowly as shown:
NOTICE
The cloth inside the left handle is intended to protect the
hand from being cut by the aluminium fins of the unit.
ONLY remove the cloth when the unit is completely
mounted:
3.2.3 To remove the accessories from the
outdoor unit
1×
1
2
3
1× 2×
b
1×
a c
1×
1×
de f
1×
1× 1× 1× 1× 1× 1×
gh i j k l
aGeneral safety precautions
bOutdoor unit installation manual
cCable tie
dFluorinated greenhouse gases label
eAdditional refrigerant charge label
fAddendum (LOT21)
gLiquid line piping — long
hLiquid line piping — short
iLiquid line piping — bend
jGas line piping — short
kGas line piping — long
lGas line piping — bend
3.3 To remove the transportation stay
NOTICE
If the unit is operated with the transportation stay attached,
abnormal vibration or noise may be generated.
The transportation stay protects the unit during transport. During
installation it must be removed.
Prerequisite: Open the service cover. See "6.2.2 To open the
outdoor unit"[413].
(10 N·m)
a
c
b
4
1
2
3
aNut
bTransportation stay
cSpacer
1Remove the nut (a) of the compressor mounting bolt.
2Remove and discard the transportation stay (b).
3Remove and discard the spacer (c).
4Re-install the nut (a) of the compressor mounting bolt and
tighten to 10N•m of torque.
4 About the units and options
4.1 Overview: About the units and
options
This chapter contains information about:
▪ Identifying the outdoor unit
▪ Combining the outdoor unit with options
4.2 Identification
NOTICE
When installing or servicing several units at the same time,
make sure NOT to switch the service panels between
different models.
4.2.1 Identification label: Outdoor unit
Location
Model identification
Example: R Z A 250 D7 Y1 B [*]
Code Explanation
R Air-cooled split outdoor unit
Z Inverter
A Refrigerant R32
200~250 Capacity class
D7 Model series
Y1 Power supply: 3N~, 380~415 V, 50 Hz

5 Preparation
Installer reference guide
9
RZA200+250D7Y1B
Sky Air Advance-series
4P573383-1 – 2019.04
Code Explanation
B European market
[*] Minor model change indication
4.3 Combining units and options
4.3.1 Possible options for the outdoor unit
Refrigerant branch kit
When connecting multiple indoor units to the outdoor unit, you need
one or more refrigerant branch kits. The outdoor‑indoor combination
determines which and how many refrigerant branch kits to use.
Layout Model name
Twin KHRQ22M20TA
Triple KHRQ250H7
Double twin KHRQ22M20TA (3×)
For more selection details, see the catalogues. For installation
instructions, see the installation manual of the refrigerant branch kit.
Bottom plate heater (EKBPH250D7)
▪ Prevents freeze-up of the bottom plate.
▪ Recommended in areas with low ambient temperature and high
humidity.
▪ For installation instructions, see the installation manual of the
bottom plate heater.
Demand adaptor PCB (KRP58M51)
▪ Also order the EKMKSA3 demand adaptor mounting plate to fix
the demand adaptor PCB.
▪ Can be used for the following:
▪ Low noise: To lower the operation sound of the outdoor unit.
▪ I-demand function: To limit the power consumption from the
system (example: budget control, limit power consumption
during peak moments…).
▪ For installation instructions, see the installation manual of the
demand adaptor kit.
5 Preparation
5.1 Overview: Preparation
This chapter describes what you have to do and know before going
on-site.
It contains information about:
▪ Preparing the installation site
▪ Preparing the refrigerant piping
▪ Preparing the electrical wiring
5.2 Preparing the installation site
Do NOT install the unit in places often used as work place. In case
of construction works (e.g. grinding works) where a lot of dust is
created, the unit MUST be covered.
Choose an installation location with sufficient space for carrying the
unit in and out of the site.
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).
5.2.1 Installation site requirements of the
outdoor unit
INFORMATION
Also read the following requirements:
▪ General installation site requirements. See the
"General safety precautions" chapter.
▪ Service space requirements. See the "Technical data"
chapter.
▪ Refrigerant piping requirements (length, height
difference). See further in this "Preparation" chapter.
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.
NOTICE
The equipment described in this manual may cause
electronic noise generated from radio-frequency energy.
The equipment complies to specifications that are
designed to provide reasonable protection against such
interference. However, there is no guarantee that
interference will not occur in a particular installation.
It is therefore recommended to install the equipment and
electric wires keeping proper distances away from stereo
equipment, personal computers, etc.
b
a
c
df e
(mm)
≥
1500
≥
1500
≥
1000
≥
1000
≥
1000
≥
1000
aEarth leakage protector
bFuse
cOutdoor unit
dIndoor unit
eUser interface
fPersonal computer or radio
▪ In places with weak reception, keep distances of 3m or more to
avoid electromagnetic disturbance of other equipment and use
conduit tubes for power and transmission lines.
▪ Select a place where rain can be avoided as much as possible.
▪ Take care that in the event of a water leak, water cannot cause
any damage to the installation space and surroundings.
▪ Choose a location where the hot/cold air discharged from the unit
or the operation noise, will NOT disturb anyone.
▪ Heat exchanger fins are sharp and injury is possible. Choose an
installation location where there is no risk for injury (especially in
areas where children play).
Do NOT install the unit in the following places:

5 Preparation
Installer reference guide
10
RZA200+250D7Y1B
Sky Air Advance-series
4P573383-1 – 2019.04
▪ Sound sensitive areas (e.g. near a bedroom), so that the
operation noise will cause no trouble.
Note: If the sound is measured under actual installation
conditions, the measured value might be higher than the sound
pressure level mentioned in Sound spectrum in the data book due
to environmental noise and sound reflections.
INFORMATION
The sound pressure level is less than 70dBA.
▪ In places where a mineral oil mist, spray or vapour may be
present in the atmosphere. Plastic parts may deteriorate and fall
off or cause water leakage.
It is NOT recommended to install the unit in the following places
because it may shorten the life of the unit:
▪ Where the voltage fluctuates a lot
▪ In vehicles or vessels
▪ Where acidic or alkaline vapour is present
Seaside installation. Make sure the outdoor unit is NOT directly
exposed to sea winds. This is to prevent corrosion caused by high
levels of salt in the air, which might shorten the life of the unit.
Install the outdoor unit away from direct sea winds.
Example: Behind the building.
b
c
a
If the outdoor unit is exposed to direct sea winds, install a
windbreaker.
▪ Height of windbreaker≥1.5×height of outdoor unit
▪ Mind the service space requirements when installing the
windbreaker.
a
b
c
d
c
d
aSea wind
bBuilding
cOutdoor unit
dWindbreaker
Strong winds (≥18km/h) blowing against the outdoor unit’s air outlet
causes short circuit (suction of discharge air). This may result in:
▪ deterioration of the operational capacity;
▪ frequent frost acceleration in heating operation;
▪ disruption of operation due to decrease of low pressure or
increase of high pressure;
▪ a broken fan (if a strong wind blows continuously on the fan, it
may start rotating very fast, until it breaks).
It is recommended to install a baffle plate when the air outlet is
exposed to wind.
It is recommended to install the outdoor unit with the air inlet facing
the wall and NOT directly exposed to the wind.
a
b
c
b
aBaffle plate
bPrevailing wind direction
cAir outlet
5.2.2 Additional installation site requirements
of the outdoor unit in cold climates
Protect the outdoor unit against direct snowfall and take care that the
outdoor unit is NEVER snowed up.
a
b
c
c
d
aSnow cover or shed
bPedestal (minimum height=150mm)
cPrevailing wind direction
dAir outlet
Snow might build up and freeze between the heat exchanger and
the casing of the unit. This might decrease the operating efficiency.
For instructions on how to prevent this (after mounting of the unit),
see "6.3.5To provide drainage"[414].
5.3 Preparing refrigerant piping
5.3.1 Refrigerant piping requirements
INFORMATION
Also read the precautions and requirements in the
"General safety precautions" chapter.
When connecting multiple indoor units to the outdoor unit, mind the
following:
Refrigerant branch kit One or more refrigerant branch kits are
required. See "4.3.1Possible options for the
outdoor unit"[49].
Upward and
downward piping
Perform upward and downward piping only
on the main piping line (L1).

5 Preparation
Installer reference guide
11
RZA200+250D7Y1B
Sky Air Advance-series
4P573383-1 – 2019.04
Branch pipes ▪ Install the branch pipes horizontally (with a
maximum inclination of 15°) or vertically.
▪ Make the length of the branch pipes to the
indoor units as short as possible.
▪ Try to keep length of the branch pipes to
the indoor units equal.
NOTICE
The piping and other pressure-containing parts shall be
suitable for refrigerant. Use phosphoric acid deoxidised
seamless copper for refrigerant.
▪ Foreign materials inside pipes (including oils for fabrication) must
be ≤30mg/10m.
Definitions: L1~L7, H1, H2
Pair(a)
H1
L1
Twin(a)
H1
H2
L1
L2
L3
Triple(a)
L2
L3
L4
H1
H2
L1
Double twin(a)
H1
H2
L1
L2
L3
L4
L5
L6
L7
(a) Assume that the longest line in the illustration corresponds
with the actual longest pipe, and the highest unit in the
illustration corresponds with the actual highest unit.
L1 Main piping
L2~L7 Branch piping
H1 Height difference between the highest indoor unit and the
outdoor unit
H2 Height difference between the highest and the lowest
indoor unit
Refrigerant branch kit
Refrigerant piping material
▪Piping material: Phosphoric acid deoxidised seamless copper.
▪Piping temper grade and thickness:
Outer diameter
(Ø)
Temper grade Thickness (t)(a)
6.4mm (1/4")
9.5mm (3/8")
12.7mm (1/2")
Annealed (O) ≥0.8mm
t
Ø
15.9mm (5/8") Annealed (O) ≥1.0mm
22.2mm (7/8") Half hard (1/2H)
(a) Depending on the applicable legislation and the unit's
maximum working pressure (see "PS High" on the unit
name plate), larger piping thickness might be required.
Refrigerant piping diameter
The refrigerant piping diameters must comply with the following:
Piping Diameter
L1 (pair, twin, triple, double twin) See below.
L2,L3 (twin)
L2~L4 (triple)
L4~L7 (double twin)
Use the same diameters as the
connections (liquid, gas) on the
indoor units.
L2,L3 (double twin) Liquid piping: Ø9.5mm
Gas piping: Ø22.2mm
L1 (pair, twin, triple, double twin):
Model New(a)/
Existing(b)
L1 liquid
piping
L1 gas piping
RZA200+250D7 Standard Ø9.5mm Ø22.2mm
Size‑up Ø12.7mm Ø25.4mm
(a) When installing new piping, use the same diameters as
the connections on the outdoor units (i.e. standard
diameters for liquid and gas piping).
(b) When reusing existing piping, you may use the size‑up
diameters, but then capacity might decrease, and stricter
piping length requirements are applicable. Assess these
limitations in relation to the complete installation.
Refrigerant piping length and height difference
The piping lengths and height differences must comply with the following requirements:
Requirement Limit
1 Minimum total one‑way piping length Pair: Limit≤L1
Twin: Limit≤L1+L3
Triple: Limit≤L1+L4
Double twin: Limit≤L1+L3+L7
5m(a)
2 Maximum total piping length Pair: L1≤limit
Twin: L1+L2+L3≤limit
Triple: L1+L2+L3+L4≤limit
Double twin:
L1+L2+L3+L4+L5+L6+L7≤limit
Ø standard 100m
Ø size-up gas pipe 100m
Ø size-up liquid pipe 50m
3 Maximum branch piping length Twin and triple: L2≤limit 20m
Double twin: L2+L4≤limit

5 Preparation
Installer reference guide
12
RZA200+250D7Y1B
Sky Air Advance-series
4P573383-1 – 2019.04
Requirement Limit
4 Maximum difference between branch piping
length
Twin: L2–L3≤limit 10m
Triple: L2–L4≤limit 10m
Double twin:
▪ L2–L3≤limit
▪ L4–L5≤limit
▪ L6–L7≤limit
▪ (L2+L4)–(L3+L7)≤limit
10m
5 Maximum height between indoor and outdoor Pair, twin, triple and double twin: H1≤limit 30m
6 Maximum height between indoors Twin, triple and double twin: H2≤limit 0.5m
(a) When piping length is <5m, a complete recharge of the unit is required. If the distance between indoor and outdoor unit is less than 5m, make
sure that the piping length is more than 5m by additional bending of the pipes.
Example
If the system layout is as follows… Then the requirements are…
▪ Triple:
L2
L3
L4
H1
H2
L1
▪ Østandard
1 5m≤L1+L4
2 L1+L2+L3+L4≤100m
3 L2≤20m
4 L2–L4≤10m
5 H1≤30m
6 H2≤0.5m
If size-up of liquid pipes is used, the indoor unit must be installed on
a lower location than the outdoor unit.
5.3.2 Refrigerant piping insulation
▪ Use polyethylene foam as insulation material:
▪ with a heat transfer rate between 0.041 and 0.052W/mK (0.035
and 0.045kcal/mh°C)
▪ with a heat resistance of at least 120°C
▪ Insulation thickness
Ambient
temperature
Humidity Minimum thickness
≤30°C 75% to 80% RH 15mm
>30°C ≥80% RH 20mm
5.4 Preparing electrical wiring
5.4.1 About preparing electrical wiring
INFORMATION
Also read the precautions and requirements in the
"General safety precautions" chapter.
INFORMATION
Also read "6.8.5 Specifications of standard wiring
components"[424].
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
ALWAYS use multicore cable for power supply cables.

6 Installation
Installer reference guide
13
RZA200+250D7Y1B
Sky Air Advance-series
4P573383-1 – 2019.04
6 Installation
6.1 Overview: Installation
This chapter describes what you have to do and know on-site to
install the system.
Typical workflow
Installation typically consists of the following stages:
▪ Mounting the outdoor unit.
▪ Mounting the indoor units.
▪ Connecting the refrigerant piping.
▪ Checking the refrigerant piping.
▪ Charging refrigerant.
▪ Connecting the electrical wiring.
▪ Finishing the outdoor installation.
▪ Finishing the indoor installation.
INFORMATION
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.
6.2 Opening the units
6.2.1 About opening the units
At certain times, you have to open the unit. Example:
▪ When connecting the refrigerant piping
▪ When connecting the electrical wiring
▪ When maintaining or servicing the unit
DANGER: RISK OF ELECTROCUTION
Do NOT leave the unit unattended when the service cover
is removed.
6.2.2 To open the outdoor unit
DANGER: RISK OF ELECTROCUTION
DANGER: RISK OF BURNING
1
3
2
(4)
1×
6.3 Mounting the outdoor unit
6.3.1 About mounting the outdoor unit
Typical workflow
Mounting the outdoor unit typically consists of the following stages:
1 Providing the installation structure.
2 Installing the outdoor unit.
3 Providing drainage.
4 Preventing the unit from falling over.
5 Protecting the unit against snow and wind by installing a snow
cover and baffle plates. See "Preparing installation site" in
"5Preparation"[49].
6.3.2 Precautions when mounting the outdoor
unit
INFORMATION
Also read the precautions and requirements in the
following chapters:
▪ General safety precautions
▪ Preparation
6.3.3 To provide the installation structure
Check the strength and level of the installation ground so that the
unit will not cause any operating vibration or noise.
Fix the unit securely by means of foundation bolts in accordance
with the foundation drawing.
Prepare 4 sets of anchor bolts, nuts and washers (field supply) as
follows:
(mm)
758
>150
(480-490)
485
4× M12
a
aMake sure not to cover the drain holes of the bottom plate
of the unit.
INFORMATION
The recommended height of the upper protruding part of
the bolts is 20mm.
20

6 Installation
Installer reference guide
14
RZA200+250D7Y1B
Sky Air Advance-series
4P573383-1 – 2019.04
NOTICE
Fix the outdoor unit to the foundation bolts using nuts with
resin washers (a). If the coating on the fastening area is
stripped off, the metal can rust easily.
a
6.3.4 To install the outdoor unit
4× M12
6.3.5 To provide drainage
▪ Make sure that condensation water can be evacuated properly.
▪ Install the unit on a base to make sure that there is proper
drainage in order to avoid ice accumulation.
▪ Prepare a water drainage channel around the foundation to drain
waste water away from the unit.
▪ Avoid drain water flowing over the footpath, so that it does NOT
become slippery in case of ambient freezing temperatures.
▪ If you install the unit on a frame, install a waterproof plate within
150 mm of the bottom side of the unit in order to prevent water
from getting into the unit and to avoid drain water dripping (see the
following figure).
INFORMATION
If necessary, you can use a drain pan (field supply) to
prevent drain water from dripping.
NOTICE
If the unit CANNOT be installed fully level, always make
sure that the inclination is towards the backside of the unit.
This is required to guarantee proper drainage.
NOTICE
If drain holes of the outdoor unit are covered by a mounting
base or by floor surface, raise the unit to provide a free
space of more than 150mm under the outdoor unit.
≥150 mm
Drain holes (dimensions in mm)
A
171 171758
43
48
288
451
613
776
408
414
349
214
111
(480~490)
107
B
B
C
D=
E
ADischarge side
BDistance between anchor points
CBottom frame
DDrain holes
EKnockout hole for snow
Snow
In regions with snowfall, snow might build up and freeze between the
heat exchanger and the casing of the unit. This might decrease the
operating efficiency.
INFORMATION
We suggest to install the optional bottom plate heater
(EKBPH250D7) when the unit is installed in cold climates.
6.3.6 To prevent the outdoor unit from falling
over
In case the unit is installed in places where strong wind can tilt the
unit, take following measure:
1Prepare 2 cables as indicated in the following illustration (field
supply).
2Place the 2 cables over the outdoor unit.
3Insert a rubber sheet between the cables and the outdoor unit
to prevent the cables from scratching the paint (field supply).
4Attach the ends of the cables and tighten them.

6 Installation
Installer reference guide
15
RZA200+250D7Y1B
Sky Air Advance-series
4P573383-1 – 2019.04
6.4 Connecting the refrigerant piping
6.4.1 About connecting the refrigerant piping
Before connecting the refrigerant piping
Make sure the outdoor and indoor unit are mounted.
Typical workflow
Connecting the refrigerant piping involves:
▪ Connecting the refrigerant piping to the outdoor unit
▪ Connecting the refrigerant piping to the indoor units (see the
installation manual of the indoor units)
▪ Connecting refrigerant branch kits
▪ Keeping in mind the guidelines for:
▪ Pipe bending
▪ Brazing
▪ Using the stop valves
▪ Removing pinched pipes
6.4.2 Precautions when connecting the
refrigerant piping
INFORMATION
Also read the precautions and requirements in the
following chapters:
▪ General safety precautions
▪ Preparation
DANGER: RISK OF BURNING
CAUTION
NEVER install a drier to this unit to guarantee its lifetime.
The drying material may dissolve and damage the system.
NOTICE
Take the following precautions on refrigerant piping into
account:
▪ Avoid anything but the designated refrigerant to get
mixed into the refrigerant cycle (e.g. air).
▪ Only use R32 when adding refrigerant.
▪ Only use installation tools (e.g. manifold gauge set) that
are exclusively used for R32 installations to withstand
the pressure and to prevent foreign materials (e.g.
mineral oils and moisture) from mixing into the system.
▪ Protect the piping as described in the following table to
prevent dirt, liquid or dust from entering the piping.
▪ Use caution when passing copper tubes through walls.
Unit Installation period Protection method
Outdoor unit >1month Pinch the pipe
<1month Pinch or tape the pipe
Indoor unit Regardless of the
period
INFORMATION
Do NOT open the refrigerant stop valve before checking
the refrigerant piping. When you need to charge additional
refrigerant it is recommended to open the refrigerant stop
valve after charging.
6.4.3 Pipe bending guidelines
Use a pipe bender for bending. All pipe bends should be as gentle
as possible (bending radius should be 30~40mm or larger).
6.4.4 To connect the refrigerant branching kit
For installation of the refrigerant branching kit, refer to the installation
manual delivered with the kit.
▪ Mount the refnet joint so that it branches either horizontally (see
view A) or vertically.
A
±
3
0
°
a
b
c
aHorizontal surface
bRefnet joint mounted vertically
cRefnet joint mounted horizontally
6.4.5 To braze the pipe end
▪ When brazing, blow through with nitrogen to prevent creation of
large quantities of oxidised film on the inside of the piping. This
film adversely affects valves and compressors in the refrigerating
system and prevents proper operation.
▪ Set the nitrogen pressure to 20 kPa (0.2 bar) (just enough so it
can be felt on the skin) with a pressure-reducing valve.
a b c d e
f
f
aRefrigerant piping
bPart to be brazed
cTaping
dManual valve
ePressure-reducing valve
fNitrogen
▪ Do NOT use anti-oxidants when brazing pipe joints.
Residue can clog pipes and break equipment.
▪ Do NOT use flux when brazing copper-to-copper refrigerant
piping. Use phosphor copper brazing filler alloy (BCuP), which
does not require flux.
Flux has an extremely harmful influence on refrigerant piping
systems. For instance, if chlorine based flux is used, it will cause
pipe corrosion or, in particular, if the flux contains fluorine, it will
deteriorate the refrigerant oil.
▪ Always protect the surrounding surfaces (e.g. insulation foam)
from heat when brazing.
6.4.6 Using the stop valve and service port
To handle the stop valve
Take the following guidelines into account:
▪ Make sure to keep all stop valves open during operation.
▪ The gas and liquid stop valves are factory closed.
▪ The figures below show the name of each part required in
handling the stop valve.

6 Installation
Installer reference guide
16
RZA200+250D7Y1B
Sky Air Advance-series
4P573383-1 – 2019.04
cd
a
b
aService port and service port cover
bStop valve
cField piping connection
dDust cap
a b
c
d
e
aService port
bDust cap
cHexagon hole
dShaft
eSeal
▪ Do NOT apply excessive force to the stop valve. Doing so may
break the valve body.
To open/close the stop valve
1Remove the dust cap.
2Insert a hexagon wrench (liquid side: 4 mm, gas side: 8 mm)
into the stop valve and turn the stop valve:
Counterclockwise to open.
Clockwise to close.
3When the stop valve CANNOT be turned any further, stop
turning.
4Tighten the stop valve securely when opening or closing the
stop valve. For the correct tightening torque value, refer to the
table below.
NOTICE
Inadequate torque may cause leakage of refrigerant and
breakage of the stop valve.
5Install the dust cap.
Result: The valve is now open/closed.
To handle the service port
▪ Always use a charge hose equipped with a valve depressor pin,
since the service port is a Schrader type valve.
▪ After handling the service port, make sure to tighten the service
port cover securely. For the tightening torque, refer to the table
below.
▪ Check for refrigerant leaks after tightening the service port cover.
Tightening torques
Stop valve
size (mm)
Tightening torque (N•m) (when opening or
closing)
Valve body Hexagonal
wrench
Service port
Ø9.5 5~7 4mm 10.7~14.7
Ø12.7 8~10
Ø15.9 14~16 6mm
Ø19.1 19~21 8mm
Ø25.4
6.4.7 To remove the pinched pipes
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.
Use the following procedure to remove the pinched piping:
1Make sure that the stop valves are fully closed.
2Connect the vacuuming/recovery unit through a manifold to the
service port of all stop valves.
aa
b
b
aService port
bStop valve
3Recover gas and oil from the pinched piping by using a
recovery unit.
CAUTION
Do not vent gases into the atmosphere.
4When all gas and oil is recovered from the pinched piping,
disconnect the charge hose and close the service ports.
5Cut off the lower part of the gas and liquid stop valve pipes
along the black line. Use an appropriate tool (e.g. a pipe cutter).

6 Installation
Installer reference guide
17
RZA200+250D7Y1B
Sky Air Advance-series
4P573383-1 – 2019.04
WARNING
Never remove the pinched piping by brazing.
Any gas or oil remaining inside the stop valve may blow off
the pinched piping.
6Wait until all oil has dripped out before continuing with the
connection of the field piping in case the recovery was not
complete.
6.4.8 To connect the refrigerant piping to the
outdoor unit
▪Piping length. Keep field piping as short as possible.
▪Piping protection. Protect the field piping against physical
damage.
1Do the following:
▪ Remove the service cover (a) with screw (b).
▪ Remove the piping intake plate (c) with screws (d).
a
c
b
dd
2Choose a piping route (a, b, c or d).
a
d
b
c
aFront
bSide
cRear
dBottom
INFORMATION
b b bb
a
a
▪ Remove the knockout hole (a) in the bottom plate or
cover plate by tapping on the attachment points with a
flat head screwdriver and a hammer.
▪ Optionally, cut out the slits (b) with a metal saw.
NOTICE
Precautions when making knockout holes:
▪ Avoid damaging the casing and underlying piping.
▪ After making the knockout holes, we recommend to
remove the burrs and paint the edges and areas
around the edges using repair paint to prevent rusting.
▪ When passing electrical wiring through the knockout
holes, wrap the wiring with protective tape to prevent
damage.
3Select the correct accessory pipes, depending on the chosen
route:
▪ Front, side and rear route: short liquid and gas pipes.
▪ Bottom route: long liquid and gas pipes.
4Do the following:
▪ Connect the accessory liquid pipe (a) to the liquid stop valve
(brazing).
▪ Connect the accessory gas pipe (b) to the gas stop valve
(brazing).
a
b
5Connect the field piping to the accessory pipes using the
accessory bend pipes (brazing). Mind the orientation of the
bends.
NOTICE
Always protect the surrounding surfaces (e.g. wiring,
insulation foam, …) from heat when brazing.
6Do the following:
▪ Insulate the liquid piping (a) and the gas piping (b).
▪ Wind heat insulation around the curves, and then cover it
with vinyl tape (c).
▪ Make sure the field piping does not touch any compressor
components.
▪ Seal the insulation ends (sealant etc.) (d).
▪ Wrap the field piping with vinyl tape (e) to protect it against
sharp edges

6 Installation
Installer reference guide
18
RZA200+250D7Y1B
Sky Air Advance-series
4P573383-1 – 2019.04
b
a
c
d
f
e
7If the outdoor unit is installed above the indoor unit, cover the
stop valves (f, see above) with sealing material to prevent
condensed water on the stop valves from moving to the indoor
unit.
NOTICE
Any exposed piping might cause condensation.
8Reattach the service cover and the piping intake plate.
9Seal all gaps (example: a) to prevent snow and small animals
from entering the system.
a
NOTICE
Do not block the air vents. This could affect air circulation
inside the unit.
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.
NOTICE
Make sure to open the stop valves after installing the
refrigerant piping and performing vacuum drying. Running
the system with the stop valves closed may break the
compressor.
6.5 Checking the refrigerant piping
6.5.1 About checking the refrigerant piping
The outdoor unit's internal refrigerant piping has been factory tested
for leaks. You only have to check the outdoor unit's external
refrigerant piping.
Before checking the refrigerant piping
Make sure the refrigerant piping is connected between the outdoor
unit and the indoor unit.
Typical workflow
Checking the refrigerant piping typically consists of the following
stages:
1 Checking for leaks in the refrigerant piping.
2 Performing vacuum drying to remove all moisture, air or
nitrogen from the refrigerant piping.
If there is a possibility of moisture being present in the refrigerant
piping (for example, water may have entered the piping), first carry
out the vacuum drying procedure below until all moisture has been
removed.
6.5.2 Precautions when checking the
refrigerant piping
INFORMATION
Also read the precautions and requirements in the
following chapters:
▪ General safety precautions
▪ Preparation
NOTICE
Use a 2-stage vacuum pump with a non-return valve that
can evacuate to a gauge pressure of −⁠100.7 kPa
(−⁠1.007 bar)(5 Torr absolute). Make sure the pump oil
does not flow oppositely into the system while the pump is
not working.
NOTICE
Use this vacuum pump for R32 exclusively. Using the
same pump for other refrigerants may damage the pump
and the unit.
NOTICE
▪ Connect the vacuum pump to both the service port of
the gas stop valve and the service port of the liquid
stop valve to increase efficiency.
▪ Make sure that the gas stop valve and liquid stop valve
are firmly closed before performing the leak test or
vacuum drying.

6 Installation
Installer reference guide
19
RZA200+250D7Y1B
Sky Air Advance-series
4P573383-1 – 2019.04
6.5.3 Checking refrigerant piping: Setup
a
c
f
c
f
b d e h
g
i
a
b
A
B
d e
R32
R32
ASetup in case of pair
BSetup in case of twin
aPressure gauge
bNitrogen
cRefrigerant
dWeighing scale
eVacuum pump
fStop valve
gMain piping
hRefrigerant branch kit
iBranch piping
6.5.4 To check for leaks
NOTICE
Do NOT exceed the unit's maximum working pressure (see
"PS High" on the unit name plate).
NOTICE
Make sure to use a recommended bubble test solution
from your wholesaler. Do not use soap water, which may
cause cracking of flare nuts (soap water may contain salt,
which absorbs moisture that will freeze when the piping
gets cold), and/or lead to corrosion of flared joints (soap
water may contain ammonia which causes a corrosive
effect between the brass flare nut and the copper flare).
1Charge the system with nitrogen gas up to a gauge pressure of
at least 200 kPa (2 bar). It is recommended to pressurize to
3000kPa (30bar) in order to detect small leaks.
2Check for leaks by applying the bubble test solution to all
connections.
3Discharge all nitrogen gas.
6.5.5 To perform vacuum drying
NOTICE
▪ Connect the vacuum pump to both the service port of
the gas stop valve and the service port of the liquid
stop valve to increase efficiency.
▪ Make sure that the gas stop valve and liquid stop valve
are firmly closed before performing the leak test or
vacuum drying.
1Vacuum the system until the pressure on the manifold indicates
−0.1MPa (−1bar).
2Leave as is for 4-5minutes and check the pressure:
If the pressure… Then…
Does not change There is no moisture in the
system. This procedure is
finished.
If the pressure… Then…
Increases There is moisture in the
system. Go to the next step.
3Vacuum the system for at least 2hours to a manifold pressure
of −0.1MPa (−1bar).
4After turning the pump OFF, check the pressure for at least
1hour.
5If you do NOT reach the target vacuum or CANNOT maintain
the vacuum for 1hour, do the following:
▪ Check for leaks again.
▪ Perform vacuum drying again.
NOTICE
Make sure to open the stop valves after installing the
refrigerant piping and performing vacuum drying. Running
the system with the stop valves closed may break the
compressor.
INFORMATION
After opening the stop valve, it is possible that the pressure
in the refrigerant piping does NOT increase. This might be
caused by e.g. the closed state of the expansion valve in
the outdoor unit circuit, but does NOT present any problem
for correct operation of the unit.
6.6 To insulate the refrigerant piping
After finishing the leak test and vacuum drying, the piping must be
insulated. Take into account the following points:
▪ Make sure to insulate the connection piping and refrigerant branch
kits entirely.
▪ Be sure to insulate the liquid and gas piping (for all units).
▪ Use heat resistant polyethylene foam which can withstand a
temperature of 70°C for liquid piping and polyethylene foam which
can withstand a temperature of 120°C for gas piping.
▪ Reinforce the insulation on the refrigerant piping according to the
installation environment.
Ambient
temperature
Humidity Minimum thickness
≤30°C 75% to 80% RH 15mm
>30°C ≥80% RH 20mm
▪ If there is a possibility that condensation on the stop valve might
drip down into the indoor unit through gaps in the insulation and
piping because the outdoor unit is located higher than the indoor
unit, this must be prevented by sealing up the connections. See
below figure.
a
b
aInsulation material
bCaulking etc.
6.7 Charging refrigerant
6.7.1 About charging refrigerant
The outdoor unit is factory charged with refrigerant, but in some
cases the following might be necessary:
What When
Charging additional refrigerant When the total liquid piping
length is more than specified
(see later).

6 Installation
Installer reference guide
20
RZA200+250D7Y1B
Sky Air Advance-series
4P573383-1 – 2019.04
What When
Completely recharging refrigerant Example:
▪ When relocating the system.
▪ After a leak.
Charging additional refrigerant
Before charging additional refrigerant, make sure the outdoor unit's
external refrigerant piping is checked (leak test, vacuum drying).
INFORMATION
Depending on the units and/or the installation conditions, it
might be necessary to connect electrical wiring before you
can charge refrigerant.
Typical workflow – Charging additional refrigerant typically consists
of the following stages:
1 Determining if and how much you have to charge additionally.
2 If necessary, charging additional refrigerant.
3 Filling in the fluorinated greenhouse gases label, and fixing it to
the inside of the outdoor unit.
Completely recharging refrigerant
Before completely recharging refrigerant, make sure the following is
done:
1 All refrigerant is recovered from the system.
2 The outdoor unit's external refrigerant piping is checked (leak
test, vacuum drying).
3 Vacuum drying on the outdoor unit's internal refrigerant piping is
performed.
NOTICE
Before completely recharging, perform vacuum drying on
the outdoor unit's internal refrigerant piping as well.
NOTICE
To perform vacuum drying or a complete recharge of the
outdoor unit’s internal refrigerant piping it is necessary to
activate the vacuum mode (see "To activate/deactivate the
vacuum mode field setting" [4 22]) which will open
required valves in the refrigerant circuit so the vacuuming
process or recharge of refrigerant can be done properly.
▪ Before vacuum drying or recharging, activate field
setting "vacuum mode".
▪ After finishing vacuum drying or recharging, deactivate
field setting "vacuum mode".
WARNING
Some sections of the refrigerant circuit may be isolated
from other sections caused by components with specific
functions (e.g. valves). The refrigerant circuit therefore
features additional service ports for vacuuming, pressure
relief or pressurizing the circuit.
In case it is required to perform brazing on the unit, ensure
that there is no pressure remaining inside the unit. Internal
pressures need to be released with ALL the service ports
indicated on the figures below opened. The location is
depending on model type.
Location of service ports:
bc
a
aInternal service port
bStop valve with service port (liquid)
cStop valve with service port (gas)
Typical workflow – Completely recharging refrigerant typically
consists of the following stages:
1 Determining how much refrigerant to charge.
2 Charging refrigerant.
3 Filling in the fluorinated greenhouse gases label, and fixing it to
the inside of the outdoor unit.
6.7.2 About the refrigerant
This product contains fluorinated greenhouse gases. Do NOT vent
gases into the atmosphere.
Refrigerant type: R32
Global warming potential (GWP) value: 675
WARNING: FLAMMABLE MATERIAL
The refrigerant inside this unit is mildly flammable.
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).
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.