Daikin LRYEN10A7Y1 User manual

Installation and operation manual
CO₂ Conveni-Pack outdoor unit and capacity up unit English
Installation and operation manual
CO₂ Conveni-Pack outdoor unit and capacity up unit
LRYEN10A7Y1
LRNUN5A7Y1

(mm)
≥300 ≥500
≥500
≥10
BB1 B2 B3
≥100 ≥500
≥500
≥50
≥300
≥200
a
a
C1 C2 C3
C
a
≥300 ≥500
≥20
≥10 ≥50
≥100 ≥500
≥100
≥300
≥400
≥200
a
A
Y X
h2
H2
500
h1
H1
1500
1

Table of contents
Installation and operation manual
3
LRYEN10A7Y1+LRNUN5A7Y1
CO₂ Conveni-Pack outdoor unit and capacity up unit
4P605461-1D – 2023.08
Table of contents
1 About the documentation 4
1.1 About this document.................................................................. 4
2 Specific installer safety instructions 4
For the user 7
3 User safety instructions 7
3.1 General...................................................................................... 7
3.2 Instructions for safe operation ................................................... 7
4 About the system 9
4.1 System layout............................................................................ 10
5 Operation 10
5.1 Operation modes....................................................................... 10
5.2 Operation range ........................................................................ 10
5.3 Field piping pressure ................................................................. 10
6 Maintenance and service 10
6.1 About the refrigerant.................................................................. 11
6.2 Recommended maintenance and inspection ............................ 11
7 Troubleshooting 11
7.1 Error codes: Overview............................................................... 12
8 Relocation 12
9 Disposal 12
For the installer 13
10 About the box 13
10.1 Outdoor unit............................................................................... 13
10.1.1 To transport the pallet................................................. 13
10.1.2 To unpack the outdoor unit ......................................... 13
10.1.3 To handle the outdoor unit.......................................... 13
10.1.4 To remove the accessories from the outdoor unit....... 14
11 About the units and options 14
11.1 About the outdoor unit ............................................................... 14
11.1.1 Labels on outdoor unit ................................................ 14
11.2 System layout............................................................................ 15
11.3 Indoor unit constraints ............................................................... 15
12 Unit installation 16
12.1 Preparing the installation site .................................................... 16
12.1.1 Installation site requirements of the outdoor unit ........ 16
12.1.2 Additional installation site requirements of the
outdoor unit in cold climates ....................................... 16
12.1.3 Additional installation site requirements for CO₂
refrigerant.................................................................... 16
12.2 Opening and closing the unit..................................................... 18
12.2.1 To open the outdoor unit............................................. 18
12.2.2 To open the electrical component box of the outdoor
unit .............................................................................. 18
12.2.3 To close the outdoor unit ............................................ 18
12.3 Mounting the outdoor unit.......................................................... 19
12.3.1 To provide the installation structure............................ 19
12.3.2 To install the outdoor unit............................................ 20
12.3.3 To provide drainage.................................................... 20
13 Piping installation 20
13.1 Preparing refrigerant piping....................................................... 20
13.1.1 Refrigerant piping requirements.................................. 20
13.1.2 Refrigerant piping material.......................................... 20
13.1.3 Refrigerant piping length and height difference .......... 20
13.1.4 To select the piping size .............................................. 21
13.1.5 To select refrigerant branch kits................................... 22
13.1.6 To select expansion valves for refrigeration ................ 23
13.2 Using stop valves and service ports........................................... 23
13.2.1 To handle the stop valve.............................................. 23
13.2.2 Tightening torques ....................................................... 24
13.2.3 To handle the service port ........................................... 24
13.3 Connecting the refrigerant piping ............................................... 25
13.3.1 To cut off the spun pipes.............................................. 25
13.3.2 To connect the refrigerant piping to the outdoor unit ... 26
13.3.3 Guidelines to connect T-joints...................................... 27
13.3.4 Guidelines to install a dryer.......................................... 28
13.3.5 Guidelines to install safety valves ................................ 28
13.3.6 Guidelines to install a filter ........................................... 29
13.4 Checking the refrigerant piping .................................................. 29
13.4.1 Checking refrigerant piping: Setup............................... 29
13.4.2 To perform a strength pressure test............................. 29
13.4.3 To perform a leak test .................................................. 30
13.4.4 To perform vacuum drying ........................................... 30
13.5 Insulating the refrigerant piping .................................................. 30
14 Electrical installation 31
14.1 Field wiring: Overview ................................................................ 32
14.2 Guidelines when knocking out knockout holes........................... 33
14.3 Guidelines when connecting the electrical wiring....................... 33
14.4 About electrical compliance........................................................ 33
14.5 Specifications of standard wiring components ........................... 34
14.6 Connections to the outdoor unit ................................................. 34
14.6.1 Low voltage wiring – Outdoor unit................................ 34
14.6.2 High voltage wiring – Outdoor unit............................... 35
14.7 Connections to the capacity up unit ........................................... 36
14.7.1 Low voltage wiring – Capacity up unit.......................... 36
14.7.2 High voltage wiring – Capacity up unit......................... 37
15 Charging refrigerant 38
15.1 Precautions when charging refrigerant....................................... 38
15.2 To determine additional refrigerant amount ............................... 38
15.3 To charge refrigerant.................................................................. 39
15.4 To fix the refrigerant charge label............................................... 39
16 Configuration 39
16.1 Making field settings................................................................... 40
16.1.1 About making field settings .......................................... 40
16.1.2 To access the field setting components....................... 40
16.1.3 Field setting components ............................................. 40
16.1.4 To access mode 1 or 2 ................................................ 41
16.1.5 To set field settings ...................................................... 41
17 Commissioning 41
17.1 Precautions when commissioning .............................................. 41
17.2 Checklist before commissioning................................................. 42
17.3 About the system test run........................................................... 42
17.4 To perform a test run (7-segment display) ................................. 42
17.4.1 Test run checks............................................................ 43
17.4.2 Correcting after abnormal completion of the test run... 44
17.5 Logbook...................................................................................... 44
18 Troubleshooting 44
18.1 Solving problems based on error codes..................................... 44
18.1.1 Error codes: Overview ................................................. 44
19 Technical data 48
19.1 Piping diagram: Outdoor unit...................................................... 48
19.2 Piping diagram: Capacity up unit................................................ 51
19.3 Wiring diagram: Outdoor unit ..................................................... 52

1 About the documentation
Installation and operation manual
4
LRYEN10A7Y1+LRNUN5A7Y1
CO₂ Conveni-Pack outdoor unit and capacity up unit
4P605461-1D – 2023.08
1 About the documentation
1.1 About this document
In this documentation the term "indoor units" is used for both
refrigeration units and air conditioning units, unless otherwise
mentioned.
Target audience
Authorised installers + end users
INFORMATION
This appliance is intended to be used by expert or trained
users in shops, in light industry and on farms, or for
commercial use by lay persons.
Documentation set
This document is part of a documentation set. The complete set
consists of:
▪General safety precautions:
▪ Safety instructions that you must read before installing
▪ Format: Paper (in the box of the outdoor unit)
▪Installation and operation manual of the outdoor unit:
▪ Installation and operation instructions
▪ Format: Paper (in the box of the outdoor unit)
▪Installer and user reference guide of the outdoor unit:
▪ Preparation of the installation, reference data,…
▪ Detailed step-by-step instructions and background information
for basic and advanced usage
▪ 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 instructions are written in English. All other languages
are translations of the original instructions.
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 Specific installer safety
instructions
Always observe the following safety instructions and regulations.
General installation requirements
WARNING
▪ Make sure to install all necessary countermeasures in
case of refrigerant leakage according to standard
EN378 (see "12.1.3 Additional installation site
requirements for CO₂ refrigerant"[416]).
▪ Make sure to install a CO2 leak detector (field supply) in
every room with refrigerant piping, air conditioning
units, showcases or blower coils, and enable the
function for refrigerant leak detection (see the
installation manual of the indoor units).
WARNING
Make sure installation, servicing, maintenance, repair and
applied materials follow the instructions from Daikin
(including all documents listed in “Documentation set”)
and, in addition, comply with applicable legislation and are
performed by qualified persons only. In Europe and areas
where IEC standards apply, EN/IEC 60335-2-40 is the
applicable standard.
CAUTION
Do NOT insert fingers, rods or other objects into the air
inlet or outlet. When the fan is rotating at high speed, it will
cause injury.
About the box (see "10About the box"[413])
WARNING
A CO2 detector is ALWAYS recommended during storage
and transport.
WARNING
Tear apart and throw away plastic packaging bags so that
nobody, especially NOT children, can play with them.
Possible consequence: suffocation.
CAUTION
To avoid injury, do NOT touch the air inlet or aluminium
fins of the unit.
About the unit and options (see "11About the units and
options"[414])
WARNING
ONLY the refrigeration parts that are also designed to work
with R744 (CO2) shall be connected to the system.
Unit Installation site (see "12Unit installation"[416])
DANGER: RISK OF BURNING/SCALDING
DANGER: RISK OF ELECTROCUTION
WARNING
▪ Make sure to install all necessary countermeasures in
case of refrigerant leakage according to standard
EN378 (see "12.1.3 Additional installation site
requirements for CO₂ refrigerant"[416]).
▪ Make sure to install a CO2 leak detector (field supply) in
every room with refrigerant piping, air conditioning
units, showcases or blower coils, and enable the
function for refrigerant leak detection (see the
installation manual of the indoor units).
WARNING
Fix the unit correctly. For instructions, see "12 Unit
installation"[416].
WARNING
Follow the service space dimensions in this manual for
correct installation of the unit. See "12.1.1Installation site
requirements of the outdoor unit"[416].
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.

2 Specific installer safety instructions
Installation and operation manual
5
LRYEN10A7Y1+LRNUN5A7Y1
CO₂ Conveni-Pack outdoor unit and capacity up unit
4P605461-1D – 2023.08
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.
WARNING
In case of mechanical ventilation, take care the ventilated
air is exhausted to the outdoor space and NOT into
another closed area.
WARNING
Install the unit ONLY in locations where the doors of the
occupied space are NOT tight fitting.
WARNING
When using safety shut-off valves, make sure to install
measures such as a bypassing piping with a pressure relief
valve (from liquid pipe to gas pipe). When the safety shut-
off valves close and no measures are installed, increased
pressure may damage the liquid piping.
WARNING
Fixing method of the outdoor unit MUST be in accordance
with the instructions from this manual. See "12.3Mounting
the outdoor unit"[419].
Piping installation (see "13Piping installation"[420])
DANGER: RISK OF BURNING/SCALDING
WARNING
The field piping method MUST be in accordance with the
instructions from this manual. See "13 Piping
installation"[420].
WARNING
The unit is partially factory charged with refrigerant R744.
WARNING
When stop valves are closed during service, the pressure
of the closed circuit will increase due to high ambient
temperature. Make sure the pressure is kept below the
design pressure.
WARNING
Any gas or oil remaining inside the stop valve may blow off
the spun piping.
If these instructions are NOT followed correctly it may
result in property damage or personal injury, which may be
serious depending on the circumstances.
WARNING
NEVER remove the spun piping by brazing.
Any gas or oil remaining inside the stop valve may blow off
the spun piping.
WARNING
ONLY connect the outdoor unit to showcases or blower
coils with a design pressure:
▪ At the high pressure side (liquid side) of 90bar gauge.
▪ At the low pressure side (gas side) of 60bar gauge (is
possible with safety valve at field gas piping).
WARNING
Before putting the system into service, check if all field
supplied components or indoor units complies with
pressure test specifications of EN378-2. If you are not
sure, it is recommended to perform the test below.
CAUTION
ALWAYS use K65 T-joints for refrigerant branching.
WARNING
Serious injury and/or damage can result from the blow-off
of the liquid receiver safety valve (see "19.1 Piping
diagram: Outdoor unit"[448]):
▪ NEVER service the unit when the pressure at the liquid
receiver is higher than 86bargauge. If the safety valve
releases refrigerant, it can cause serious injury and/or
damage. The safety valve is installed to protect the
liquid receiver. The set pressure of the liquid receiver
safety valve can be 90 bar gauge ±3% or
86 bar gauge ±3%, depending on the safety valve
present in your unit. Confirm the set pressure by
checking the safety valve body.
▪ If the pressure > set pressure, ALWAYS discharge
from pressure relief devices before servicing.
▪ It is recommended to install and secure blow-off piping
to the safety valve.
▪ ONLY alter the safety valve if the refrigerant has been
removed.
WARNING
All installed safety valves MUST ventilate to the outdoor
space and NOT into a closed area.
CAUTION
When installing a safety valve, ALWAYS add enough
support to the valve. An activated safety valve is under
high pressure. If not installed securely, the safety valve
may cause damage to the piping or the unit.
CAUTION
Do NOT open the stop valve until you have measured the
insulation resistance of the main power supply circuit.
CAUTION
ALWAYS use nitrogen gas for leak tests.
Electrical installation (see "14Electrical installation"[431])
DANGER: RISK OF ELECTROCUTION
WARNING
Electrical wiring connection method MUST be in
accordance with the instructions from:
▪ This manual. See "14Electrical installation"[431].
▪ 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 "19.3 Wiring
diagram: Outdoor unit"[452].

2 Specific installer safety instructions
Installation and operation manual
6
LRYEN10A7Y1+LRNUN5A7Y1
CO₂ Conveni-Pack outdoor unit and capacity up unit
4P605461-1D – 2023.08
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 shocks.
▪ 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, extension cords, or
connections from a star system. They can cause
overheating, electrical shocks 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
ALWAYS use multicore cable for power supply cables.
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.
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.
WARNING
▪ All wiring MUST be performed by an authorised
electrician and MUST comply with the applicable
national wiring regulation.
▪ 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.
INFORMATION
Details of type and rating of fuses, or rating of circuit
breakers are described in "14Electrical installation"[431].
Charging refrigerant (see "15Charging refrigerant"[438])
WARNING
Charging of refrigerant MUST be in accordance with the
instructions from this manual. See "15 Charging
refrigerant"[438].
WARNING
▪ ONLY use R744 (CO2) as refrigerant. Other substances
may cause explosions and accidents.
▪ When installing, charging refrigerant, maintaining or
performing service, ALWAYS use personal protective
equipment, such as safety shoes, safety gloves and
safety glasses.
▪ If the unit is installed indoors (for example, in a
machine room), ALWAYS use a portable CO2 detector.
▪ If the front panel is open, ALWAYS beware of the
rotating fan. The fan will continue rotating for a while,
even after the power switch has been turned off.
WARNING
The unit is already filled with a certain amount of R744. Do
NOT open liquid and gas stop valves until all checks from
the "17.2 Checklist before commissioning" [4 42] are
completed.
WARNING
After charging refrigerant, keep the power supply and
operation switch of the outdoor unit ON to avoid a pressure
increase on the low pressure (suction piping) side and to
avoid pressure increase on the pressure side of the liquid
receiver.
CAUTION
A vacuumed system will be under triple point. To avoid
solid ice, ALWAYS start charging with R744 in vapour
state. When the triple point is reached (5.2 bar absolute
pressure or 4.2 bar gauge pressure), you may continue
charging with R744 in liquid state.
CAUTION
Do NOT charge liquid refrigerant directly to a gas line.
Liquid compression could cause compressor operation
failure.
Configuration (see "16Configuration"[439])
DANGER: RISK OF ELECTROCUTION
WARNING
If any part of system is already (accidentally) powered on,
setting [2-21] on the outdoor unit can be set to value 1 to
open the valves (Y1E, Y2E, Y7E, Y8E, Y13E, Y16E, Y17E,
Y11S~Y16S, Y21S~Y26S, Y31S~Y34S, Y44S).
Commisioning (see "17Commissioning"[441])
WARNING
Commissioning method MUST be in accordance with the
instructions from this manual. See
"17Commissioning"[441].
CAUTION
Do NOT perform the test operation while working on
the indoor units.
When performing the test operation, NOT ONLY the
outdoor unit, but the connected indoor unit will operate as
well. Working on an indoor unit while performing a test
operation is dangerous.

3 User safety instructions
Installation and operation manual
7
LRYEN10A7Y1+LRNUN5A7Y1
CO₂ Conveni-Pack outdoor unit and capacity up unit
4P605461-1D – 2023.08
CAUTION
After the refrigerant is fully charged, do NOT turn off the
operation switch and power supply of the outdoor unit. This
prevents the safety valve actuation due to an increase in
internal pressure under high ambient temperature
conditions.
When internal pressure rises, the outdoor unit can operate
by itself to reduce the internal pressure, even if no indoor
unit is operating.
CAUTION
ALWAYS turn off the operation switch BEFORE turning off
the power supply.
For the user
3 User safety instructions
Always observe the following safety instructions and regulations.
3.1 General
WARNING
If you are NOT sure how to operate the
unit, contact your installer.
WARNING
This appliance can be used by children
aged from 8 years and above and
persons with reduced physical, sensory
or mental capabilities or lack of
experience and knowledge if they have
been given supervision or instruction
concerning use of the appliance in a
safe way and understand the hazards
involved.
Children SHALL NOT play with the
appliance.
Cleaning and user maintenance
SHALL NOT be made by children
without supervision.
WARNING
To prevent electrical shocks or fire:
▪ Do NOT rinse the unit.
▪ Do NOT operate the unit with wet
hands.
▪ Do NOT place any objects containing
water on the unit.
CAUTION
▪ Do NOT place any objects or
equipment on top of the unit.
▪ Do NOT sit, climb or stand on the
unit.
▪ Units are marked with the following symbol:
This means that electrical and electronic products may NOT be
mixed with unsorted household waste. Do NOT try to dismantle
the system yourself: dismantling the system, treatment of the
refrigerant, of oil and of other parts MUST be done by an
authorised installer and MUST comply with applicable legislation.
Units MUST be treated at a specialised treatment facility for reuse,
recycling and recovery. By ensuring this product is disposed of
correctly, you will help to prevent potential negative consequences
for the environment and human health. For more information,
contact your installer or local authority.
▪ Batteries are marked with the following symbol:
This means that the batteries may NOT be mixed with unsorted
household waste. If a chemical symbol is printed beneath the
symbol, this chemical symbol means that the battery contains a
heavy metal above a certain concentration.
Possible chemical symbols are: Pb: lead (>0.004%).
Waste batteries MUST be treated at a specialised treatment
facility for reuse. By ensuring waste batteries are disposed of
correctly, you will help to prevent potential negative consequences
for the environment and human health.
3.2 Instructions for safe operation
WARNING
Before operating the unit, be sure the
installation has been carried out
correctly by an installer.
WARNING
This unit contains electrical and hot
parts.

3 User safety instructions
Installation and operation manual
8
LRYEN10A7Y1+LRNUN5A7Y1
CO₂ Conveni-Pack outdoor unit and capacity up unit
4P605461-1D – 2023.08
WARNING
Do NOT keep flammable materials
inside the unit. They may cause an
explosion or a fire.
WARNING: FLAMMABLE MATERIAL
Do NOT place a flammable spray
bottle near the unit and do NOT use
sprays near the unit. Possible
consequence: fire.
WARNING
NEVER use a flammable spray such
as hair spray, lacquer or paint near the
unit. It may cause a fire.
CAUTION
If this unit is installed indoors, it must
ALWAYS be equipped with an
electrically powered safety measure
such as a CO2 refrigerant leak detector
(field supply). In order to be effective,
the unit must ALWAYS be electrically
powered after installation.
If for any reason the CO2 refrigerant
leak detector is powered OFF,
ALWAYS use a portable CO2 detector.
CAUTION
To avoid oxygen deficiency, ventilate
the room sufficiently if equipment with
burner is used together with the
system.
CAUTION
Do NOT operate the system when
using a room fumigation-type
insecticide. Chemicals could collect in
the unit, and endanger the health of
people who are hypersensitive to
chemicals.
CAUTION
▪ NEVER touch the internal parts of the
controller.
▪ Do NOT remove the front panel.
Some parts inside are dangerous to
touch and appliance problems may
happen. For checking and adjusting
the internal parts, contact your
dealer.
CAUTION
Do NOT insert fingers, rods or other
objects into the air inlet or outlet. Do
NOT remove the fan guard. When the
fan is rotating at high speed, it will
cause injury.
CAUTION
It is unhealthy to expose your body to
the air flow for a long time.
CAUTION
NEVER expose little children, plants or
animals directly to the airflow.
About the system (see "4About the system"[49])
WARNING
Do NOT modify, disassemble, remove,
reinstall or repair the unit yourself as
incorrect dismantling or installation
may cause an electrical shock or fire.
Contact your dealer.
Maintenance and service (see "6Maintenance and
service"[410])
DANGER: RISK OF
ELECTROCUTION
To clean showcases or blower coils,
stop operation and turn OFF all power
supplies. Possible consequence:
electrical shock and injury.
DANGER: RISK OF
ELECTROCUTION
To clean the air conditioner or air filter,
be sure to stop operation and turn all
power supplies OFF. Otherwise, an
electrical shock and injury may result.
WARNING:
12 MPa
System contains
refrigerant under very high
pressure.
The system MUST be serviced by
qualified persons ONLY.
WARNING
NEVER replace a fuse with a fuse of a
wrong ampere ratings or other wires
when a fuse blows out. Use of wire or
copper wire may cause the unit to
break down or cause a fire.

4 About the system
Installation and operation manual
9
LRYEN10A7Y1+LRNUN5A7Y1
CO₂ Conveni-Pack outdoor unit and capacity up unit
4P605461-1D – 2023.08
WARNING
Be careful with ladders when working
in high places.
WARNING
Do NOT let the indoor unit get wet.
Possible consequence: Electrical
shock or fire.
WARNING
When turning the power OFF for a long
stop period, ALWAYS remove the
refrigerant from the units. If you cannot
remove the refrigerant for any reason,
ALWAYS keep the power turned ON.
WARNING
▪ Do NOT pierce or burn refrigerant
cycle parts.
▪ Be aware that the refrigerant inside
the system is odourless.
WARNING
The R744 refrigerant (CO2) inside the
unit is odourless, non-flammable and
normally does NOT leak.
If the unit is installed indoors, ALWAYS
install a CO2 detector according to the
specifications of standard EN378.
If the refrigerant leaks in high
concentrations in the room, it may have
negative effects on its occupants such
as asphyxiation and carbon dioxide
poisoning. 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
Do NOT modify, disassemble, remove,
reinstall or repair the unit yourself as
incorrect dismantling or installation
may cause an electrical shock or fire.
Contact your dealer.
CAUTION
Do NOT insert fingers, rods or other
objects into the air inlet or outlet. When
the fan is rotating at high speed, it will
cause injury.
CAUTION: Pay attention to the fan!
It is dangerous to inspect the unit while
the fan is running.
Make sure to turn OFF the main switch
before executing any maintenance
task.
CAUTION
After a long use, check the unit stand
and fitting for damage. If damaged, the
unit may fall and result in injury.
CAUTION
Before accessing terminal devices,
make sure to interrupt all power supply.
Troubleshooting (see "7Troubleshooting"[411])
WARNING
Stop operation and shut OFF the
power if anything unusual occurs
(burning smells etc.).
Leaving the unit running under such
circumstances may cause breakage,
electrical shock or fire. Contact your
dealer.
4 About the system
The indoor units can be used for heating/cooling and refrigerating
applications. The type of indoor units which can be used depends on
the outdoor units series.
WARNING
Do NOT modify, disassemble, remove, reinstall or repair
the unit yourself as incorrect dismantling or installation may
cause an electrical shock or fire. Contact your dealer.
NOTICE
Do NOT use the system for other purposes. In order to
avoid any quality deterioration, do NOT use the unit for
cooling precision instruments or works of art.
NOTICE
Do NOT use the system for cooling water. It may freeze.

5 Operation
Installation and operation manual
10
LRYEN10A7Y1+LRNUN5A7Y1
CO₂ Conveni-Pack outdoor unit and capacity up unit
4P605461-1D – 2023.08
NOTICE
For future modifications or expansions of your system:
A full overview of allowable combinations (for future
system extensions) is available in technical engineering
data and should be consulted. Contact your installer to
receive more information and professional advice.
4.1 System layout
INFORMATION
The following figure is an example and may NOT
completely match your system layout
ab
e e
d c
f
h
i
j
k
h
l
i
j
k
l
g
aMain outdoor unit (LRYEN10*)
bCapacity up unit (LRNUN5*)
cCommunication box (BRR9B1V1)
dIndoor unit for air conditioning (field supply)
eIndoor unit for refrigeration (showcase) (field supply)
fIndoor unit for refrigeration (blower coil) (field supply)
gSafety valve (field supply)
hCO2 control panel (field supply)
iCO2 detector (field supply)
jCO2 alarm (field supply)
kCO2 ventilator (field supply)
lShut off valve (field supply)
5 Operation
5.1 Operation modes
The following operation modes are possible:
▪ Refrigeration only
▪ Cooling only
▪ Cooling and refrigeration
▪ Heating and refrigeration:
▪ With fully heat recovery
▪ With outdoor heat exchanger as gas cooler
▪ With outdoor heat exchanger as evaporator
▪ Heating only
5.2 Operation range
Use the system in the following temperature ranges for safe and
effective operation.
Refrigeration Air
conditioning
cooling
Air
conditioning
heating
Outdoor
temperature
–20~43°CDB(a) –5~43°CDB –20~16°CWB
Indoor
temperature
— 14~24°CWB 15~27°CDB
(a) For low load restrictions, see 'Constraints for refrigeration' in the
Installer and user reference guide.
5.3 Field piping pressure
Always keep the following field piping pressures in mind:
Side Piping Field piping
pressure
Refrigeration Gas 90bar gauge
Liquid 90bar gauge
Air conditioning Gas 120bar gauge
Liquid 90bar gauge
6 Maintenance and service
WARNING
NEVER replace a fuse with a fuse of a wrong ampere
ratings or other wires when a fuse blows out. Use of wire
or copper wire may cause the unit to break down or cause
a fire.
CAUTION: Pay attention to the fan!
It is dangerous to inspect the unit while the fan is running.
Make sure to turn OFF the main switch before executing
any maintenance task.
CAUTION
Do NOT insert fingers, rods or other objects into the air
inlet or outlet. Do NOT remove the fan guard. When the
fan is rotating at high speed, it will cause injury.
CAUTION
After a long use, check the unit stand and fitting for
damage. If damaged, the unit may fall and result in injury.
NOTICE
NEVER inspect or service the unit by yourself. Ask a
qualified service person to perform this work.

7 Troubleshooting
Installation and operation manual
11
LRYEN10A7Y1+LRNUN5A7Y1
CO₂ Conveni-Pack outdoor unit and capacity up unit
4P605461-1D – 2023.08
NOTICE
Do NOT wipe the controller operation panel with benzine,
thinner, chemical dust cloth, etc. The panel may get
discoloured or the coating peeled off. If it is heavily dirty,
soak a cloth in water-diluted neutral detergent, squeeze it
well and wipe the panel clean. Wipe it with another dry
cloth.
6.1 About the refrigerant
This product contains refrigerant gases.
Refrigerant type: R744 (CO2)
WARNING
▪ Do NOT pierce or burn refrigerant cycle parts.
▪ Be aware that the refrigerant inside the system is
odourless.
WARNING
The R744 refrigerant (CO2) inside the unit is odourless,
non-flammable and normally does NOT leak.
If the unit is installed indoors, ALWAYS install a CO2
detector according to the specifications of standard EN378.
If the refrigerant leaks in high concentrations in the room, it
may have negative effects on its occupants such as
asphyxiation and carbon dioxide poisoning. 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.
6.2 Recommended maintenance and
inspection
Since dust collects when using the unit for several years,
performance of the unit will deteriorate to some extent. As taking
apart and cleaning interiors of units requires technical expertise and
in order to ensure the best possible maintenance of your units, we
recommend to enter into a maintenance and inspection contract on
top of normal maintenance activities. Our network of dealers has
access to a permanent stock of essential components in order to
keep your unit in operation as long as possible. Contact your dealer
for more information.
When asking your dealer for an intervention, always state:
▪ The complete model name of the unit.
▪ The manufacturing number (stated on the nameplate of the unit).
▪ The installation date.
▪ The symptoms or malfunction, and details of the defect.
WARNING
Do NOT modify, disassemble, remove, reinstall or repair
the unit yourself as incorrect dismantling or installation may
cause an electrical shock or fire. Contact your dealer.
7 Troubleshooting
If system malfunctions are likely to degrade the articles in the room/
showcase, you can ask your installer to install an alarm (example:
lamp). For more information, contact your installer.
If one of the following malfunctions occurs, take the measures
shown below and contact your dealer.
WARNING
Stop operation and shut OFF the power if anything
unusual occurs (burning smells etc.).
Leaving the unit running under such circumstances may
cause breakage, electrical shock or fire. Contact your
dealer.
The system MUST be repaired by a qualified service person.
Malfunction Measure
A safety device such as a fuse, a
breaker or an earth leakage breaker
frequently actuates or the ON/OFF
switch does NOT properly work.
Contact your dealer or
installer.
Water (other than defrost water) leaks
from the unit.
Stop the operation.
The operation switch does NOT work
well.
Turn OFF the power
supply.
The user interface display indicates the
unit number, the operation lamp flashes
and the malfunction code appears.
Notify your installer and
report the malfunction
code.
The safety valve has opened. 1 Stop the operation.
2 Turn OFF the power
supply.
3 Inform your installer.
If the system does NOT operate properly except for the above
mentioned cases and none of the above mentioned malfunctions is
evident, investigate the system in accordance with the following
procedures.
Malfunction Measure
If the system does not
operate at all.
▪ Check if there is no power failure. Wait
until power is restored. If power failure
occurs during operation, the system
automatically restarts immediately after
the power is restored.
▪ Check if no fuse has blown or breaker is
activated. Change the fuse or reset the
breaker if necessary.
The system stops
immediately after
starting operation.
▪ Check if air inlet or outlet of outdoor or
indoor unit is not blocked by obstacles.
Remove any obstacles and make sure
the air can flow freely.
▪ Check if the user interface display shows
(time to clean the air filter). (Refer to
"6 Maintenance and service" [4 10] and
"Maintenance" in the indoor unit manual.)

8 Relocation
Installation and operation manual
12
LRYEN10A7Y1+LRNUN5A7Y1
CO₂ Conveni-Pack outdoor unit and capacity up unit
4P605461-1D – 2023.08
Malfunction Measure
The system operates
but cooling or heating
is insufficient.
(for air conditioner
indoor units)
▪ Check if air inlet or outlet of outdoor or
indoor unit is not blocked by obstacles.
Remove any obstacles and make sure
the air can flow freely.
▪ Check if the air filter is not clogged (refer
to "Maintenance" in the indoor unit
manual).
▪ Check the temperature setting.
▪ Check the fan speed setting on your user
interface.
▪ Check for open doors or windows. Close
doors and windows to prevent wind from
coming in.
▪ Check if there are too many occupants in
the room during cooling operation. Check
if the heat source of the room is
excessive.
▪ Check if direct sunlight enters the room.
Use curtains or blinds.
▪ Check if the air flow angle is proper.
The system operates
but cooling is
insufficient.
(for refrigerator and
freezer indoor units)
▪ Check if air inlet or outlet of outdoor or
indoor unit is not blocked by obstacles.
Remove any obstacles and make sure
the air can flow freely.
▪ Check if the indoor unit is not frosted up.
Defrost the unit manually, or shorten the
defrost operation cycle.
▪ Check if there are not too many articles
inside the room/showcase. Remove a
couple of articles.
▪ Check if there is smooth air circulation
inside the room/showcase. Reorganise
the articles inside the room/showcase.
▪ Check if there is not too much dust on
the outdoor unit heat exchanger.
Remove the dust with a brush or vacuum
cleaner, without using water. If
necessary, consult your dealer.
▪ Check if there is cold air leaking outside
of the room/showcase. Stop the air from
leaking outside.
▪ Check if you did not set the indoor unit
setpoint temperature too high. Set the
setpoint appropriately.
▪ Check if there are no high-temperature
articles stored in the room/showcase.
Always store articles after they have
cooled down.
▪ Check if the door is not opened too long.
Reduce the opening time of the door.
If after checking all above items, it is impossible to fix the problem
yourself, contact your installer and state the symptoms, the complete
model name of the unit (with manufacturing number if possible) and
the installation date (possibly listed on the warranty card).
7.1 Error codes: Overview
In case a malfunction code appears on the indoor unit user interface
display, contact your installer and inform the malfunction code, the
unit type, and serial number (you can find this information on the
nameplate of the unit).
For your reference, a list with malfunction codes is provided. You
can, depending on the level of the malfunction code, reset the code
by pushing the ON/OFF button. If not, ask your installer for advice.
Code Cause Solution
Electric leakage Restart the unit. If the
problem reoccurs, contact
your dealer.
The stop valve of an
outdoor unit is left closed.
Open the stop valve on
both the gas and liquid
side.
The stop valve of an
outdoor unit is left closed.
Open the stop valve on
both the gas and liquid
side.
The air passage is blocked. Remove obstacles that
block the passage of air to
the outdoor unit.
Lost phase in power
supply.
Check the connection of
the power supply cable.
Insufficient supply voltage Check if the supply voltage
is supplied properly.
Wrong transmission wiring
between units
Check the connection of
transmission wiring
between the outdoor unit
and the air conditioner.
Wrong combination of
indoor units
▪ Check the number of
connected indoor units.
▪ Check if an indoor unit is
installed that is not a
possible combination.
Wrong transmission wiring
between units
Check the connection of
transmission wiring
between the outdoor unit
and the air conditioner.
Refer to the service manual for other malfunction codes.
If no malfunction code is displayed, check if:
▪ power of indoor unit is turned on,
▪ user interface wiring is broken or incorrectly wired,
▪ fuse on PCB has melted.
8 Relocation
Contact your dealer to remove and reinstall the entire unit. Moving
units requires technical expertise.
9 Disposal
NOTICE
Do NOT try to dismantle the system yourself: dismantling
of the system, treatment of the refrigerant, oil and other
parts MUST comply with applicable legislation. Units
MUST be treated at a specialised treatment facility for
reuse, recycling and recovery.

10 About the box
Installation and operation manual
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LRYEN10A7Y1+LRNUN5A7Y1
CO₂ Conveni-Pack outdoor unit and capacity up unit
4P605461-1D – 2023.08
For the installer
10 About the box
Keep the following in mind:
▪ At delivery, the unit MUST be checked for damage and
completeness. Any damage or missing parts 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 in advance the path along which you want to bring the
unit to its final installation position.
▪ When handling the unit, take into account the following:
Fragile, handle the unit with care.
Keep the unit upright in order to avoid compressor
damage.
▪ A forklift can be used for transport as long as the unit remains on
its pallet.
10.1 Outdoor unit
WARNING
A CO2 detector is ALWAYS recommended during storage
and transport.
Also see "Label about maximum storage temperature"[415].
10.1.1 To transport the pallet
▪ A forklift can be used for transport as long as the unit remains on
its pallet.
1Transport the outdoor unit as shown in the figure below.
a b
aOutdoor unit
bCapacity up unit
NOTICE
Use filler cloth on the forklift arms to prevent damage to the
unit. Damage to the painting of the unit decreases the anti-
corrosion protection.
10.1.2 To unpack the outdoor unit
1Remove the packaging material from the unit. Take care not to
damage the unit when removing the shrink foil with a cutter.
a b
aOutdoor unit
bCapacity up unit
WARNING
Tear apart and throw away plastic packaging bags so that
nobody, especially NOT children, can play with them.
Possible consequence: suffocation.
2The unit is fixed to the pallet with bolts. Remove these bolts.
4×8×
a b
aOutdoor unit
bCapacity up unit
10.1.3 To handle the outdoor unit
CAUTION
To avoid injury, do NOT touch the air inlet or aluminium
fins of the unit.
1Unpack the outdoor unit. See also "10.1.2 To unpack the
outdoor unit"[413].
2Lift the outdoor unit preferably with a crane and 2 belts of at
least 8 m long as shown in the figure below. Always use
protectors to prevent belt damage and pay attention to the
centre of gravity of the unit.
Outdoor unit

11 About the units and options
Installation and operation manual
14
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CO₂ Conveni-Pack outdoor unit and capacity up unit
4P605461-1D – 2023.08
Capacity up unit
NOTICE
Use a belt sling that adequately bears the weight of the
unit.
The width of the holes for belts in the outdoor unit is
90mm.
Also see the label about handling on the unit.
10.1.4 To remove the accessories from the
outdoor unit
Outdoor unit
a b
c
e f
d
AA
GWP:XXX
RXXX
aGeneral safety precautions
bOperation and installation manual
cDeclaration of conformity
dRefrigerant charge label
eCopper packings for stop valve caps (15×)
fCopper packings for service port caps (15×)
Capacity up unit
a
aDeclaration of conformity
11 About the units and options
11.1 About the outdoor unit
This installation manual concerns the outdoor unit and the optional
capacity up unit.
These units are intended for outdoor installation and aimed for air to
air heating, cooling and refrigeration applications.
NOTICE
These units (LRYEN10* and LRNUN5*) are only parts of
an air conditioner system, complying with partial unit
requirements of the International Standard IEC
60335-2-40:2018. As such, they must ONLY be connected
to other units that have been confirmed as complying to
corresponding partial unit requirements of this International
Standard.
General name and product name
In this manual, we use the following names:
General name Product name
Outdoor unit LRYEN10A7Y1
Capacity up unit LRNUN5A7Y1
Temperature range
Refrigeration Air
conditioning
cooling
Air
conditioning
heating
Outdoor
temperature
–20~43°CDB(a) –5~43°CDB –20~16°CWB
Indoor
temperature
— 14~24°CWB 15~27°CDB
(a) For low load restrictions, see 'Constraints for refrigeration' in the
Installer and user reference guide.
11.1.1 Labels on outdoor unit
Label about flow directions
Text on caution label Translation
from LRYEN10A7Y1 or
LREN12A7Y1B to Refrigeration
From LRYEN10A7Y1 or
LREN12A7Y1B to Refrigeration
Gas for Airco Gas for Airco
Liquid for Airco Liquid for Airco
Gas from Refrigeration Gas from Refrigeration
Liquid to LRNUN5A7Y1 or to
Refrigeration
Liquid to LRNUN5A7Y1 or to
Refrigeration

11 About the units and options
Installation and operation manual
15
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CO₂ Conveni-Pack outdoor unit and capacity up unit
4P605461-1D – 2023.08
Label about safety valve
WARNING
Unit is charged and under high pressure.
Check the pressure in the liquid receiver during
service.
Do NOT service the unit when the liquid receiver
pressure is higher than 86 bar g.
If refrigerant temperature is higher than 31°C
there is a possibility that the safety valve will
open during service or power shutdown.
Text on warning label Translation
Unit is charged and under high
pressure.
Unit is charged and under high
pressure.
Check the pressure in the liquid
receiver during service.
Check the pressure in the liquid
receiver during service.
Do NOT service the unit when
the liquid receiver pressure is
higher than 86 bar g.
Do NOT service the unit when
the liquid receiver pressure is
higher than 86barg.
If refrigerant temperature is
higher than 31°C there is a
possibility that the safety valve
will open during service or power
shutdown.
If refrigerant temperature is
higher than 31°C there is a
possibility that the safety valve
will open during service or power
shutdown.
Check the set pressure of the safety valve at the low pressure side
of the refrigeration cabinet to verify a safe service temperature.
Also see "13.3.5Guidelines to install safety valves"[428].
Card about stop valves and service ports
WARNING
Unit is charged and under high pressure.
Text on warning card Translation
Unit is charged and under high
pressure.
Unit is charged and under high
pressure.
Also see "13.2Using stop valves and service ports"[423].
Label about maximum storage temperature
MAXIMUM STORAGE TEMPERATURE.
55°C
A CO2detector is always recommended during storage and transport.
Text on warning label Translation
MAXIMUM STORAGE
TEMPERATURE: 55°C
MAXIMUM STORAGE
TEMPERATURE: 55°C
A CO2 detector is always
recommended during storage
and transport.
A CO2 detector is always
recommended during storage
and transport.
The unit it factory charged with refrigerant. To avoid the safety relief
valve being opened, the unit must not be exposed to temperatures
above 55°C.
11.2 System layout
INFORMATION
The following figure is an example and may NOT
completely match your system layout
ab
e e
d c
f
h
i
j
k
h
l
i
j
k
l
g
aMain outdoor unit (LRYEN10*)
bCapacity up unit (LRNUN5*)
cCommunication box (BRR9B1V1)
dIndoor unit for air conditioning (field supply)
eIndoor unit for refrigeration (showcase) (field supply)
fIndoor unit for refrigeration (blower coil) (field supply)
gSafety valve (field supply)
hCO2 control panel (field supply)
iCO2 detector (field supply)
jCO2 alarm (field supply)
kCO2 ventilator (field supply)
lShut off valve (field supply)
11.3 Indoor unit constraints
WARNING
ONLY the refrigeration parts that are also designed to work
with R744 (CO2) shall be connected to the system.

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Installation and operation manual
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CO₂ Conveni-Pack outdoor unit and capacity up unit
4P605461-1D – 2023.08
NOTICE
The design pressure of high pressure side of the
connected refrigeration parts MUST be 9 MPaG (90 bar
gauge).
NOTICE
If the design pressure of the gas piping of refrigeration
parts is different from 90bar gauge (for example: 6 MPaG
(60bar gauge)), a safety valve MUST be installed on the
field piping according to this design pressure. It is NOT
possible to connect refrigeration parts with design pressure
below 60bar gauge.
NOTICE
The design pressure of the connected air conditioning
parts MUST be 12MPaG (120bar gauge). If this is not the
case, please contact your dealer for assistance.
12 Unit installation
WARNING
▪ Make sure to install all necessary countermeasures in
case of refrigerant leakage according to standard
EN378 (see "12.1.3 Additional installation site
requirements for CO₂ refrigerant"[416]).
▪ Make sure to install a CO2 leak detector (field supply) in
every room with refrigerant piping, air conditioning
units, showcases or blower coils, and enable the
function for refrigerant leak detection (see the
installation manual of the indoor units).
WARNING
Fix the unit correctly. For instructions, see "12 Unit
installation"[416].
NOTICE
Adverse effects shall be considered. For example, danger
of water collecting and freezing in discharge pipes for
pressure relief devices, accumulation of dirt and debris, or
blockage of the discharge pipes by solid CO2 (R744).
INFORMATION
The installer is responsible for supplying the field supply
components.
12.1 Preparing the installation site
12.1.1 Installation site requirements of the
outdoor unit
CAUTION
Appliance NOT accessible to the general public, install it in
a secured area, protected from easy access.
The equipment meets the requirements for commercial
and light-industrial locations when professionally installed
and maintained.
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.
NOTICE
If the equipment is installed closer than 30 m to a
residential location, the professional installer MUST
evaluate the EMC situation before installation.
NOTICE
This is a class A product. In a domestic environment this
product may cause radio interference in which case the
user may be required to take adequate measures.
INFORMATION
The sound pressure level is less than 70dBA.
Mind the spacing guidelines. See figure 1 on the inside of the front
cover of this manual.
Description of text on figure 1:
Item Description
A Maintenance space
B Possible patterns with installation
spaces in case of a single
outdoor unit(a)(b)(c)(d)
C Possible patterns with installation
spaces in case of an outdoor unit
connected to a capacity up unit(a)
(b)(c)(d)
h1 H1 (actual height)–1500mm
h2 H2 (actual height)–500mm
X Front side = 500mm+≥h1/2
Y (for patterns B) Air inlet side = 300mm+≥h2/2
Y (for patterns C) Air inlet side = 100mm+≥h2/2
(a) Wall height front side: ≤1500mm.
(b) Wall height air inlet side: ≤500mm.
(c) Wall height other sides: no limit.
(d) Calculate h1 and h2 as shown in the figure. Add h1/2 for
maintenance space to the front side. Add h2/2 for maintenance
space to the back side (if wall height exceeds above values).
12.1.2 Additional installation site requirements
of the outdoor unit in cold climates
In heavy snowfall areas it is very important to select an installation
site where the snow will NOT affect the unit. If lateral snowfall is
possible, make sure that the heat exchanger coil is NOT affected by
the snow. If necessary, install a snow cover or shed and a pedestal.
INFORMATION
For instructions on how to install the snow cover, contact
your dealer.
12.1.3 Additional installation site requirements
for CO₂ refrigerant
NOTICE
Although it is recommended to install LRYEN10* and
LRNUN5* outdoors, in some cases it might be needed to
install them inside. In such cases, ALWAYS follow the
indoor installation site requirements for CO2 refrigerant.
WARNING
In case of mechanical ventilation, take care the ventilated
air is exhausted to the outdoor space and NOT into
another closed area.
Refrigerant basic characteristics
Refrigerant R744
RCL (refrigerant concentration limit) 0.072kg/m3

12 Unit installation
Installation and operation manual
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LRYEN10A7Y1+LRNUN5A7Y1
CO₂ Conveni-Pack outdoor unit and capacity up unit
4P605461-1D – 2023.08
Refrigerant basic characteristics
QLMV (quantity limit with minimum ventilation) 0.074kg/m3
QLAV (quantity limit with additional ventilation) 0.18kg/m3
Toxicity limit 0.1kg/m3
Safety class A1
INFORMATION
For more information regarding allowable refrigerant
charge and space volume calculations see the reference
guide of the indoor unit.
Appropriate measures
INFORMATION
Appropriate measures are field supply. Choose and install
all required appropriate measures in accordance with
EN378-3:2016.
▪ (natural or mechanical) ventilation
▪ safety shut-off valves
▪ safety alarm, in combination with a CO2 refrigerant leak detector (a
safety alarm alone is NOT considered an appropriate measure
where occupants are restricted in their movements)
▪ CO2 refrigerant leak detector
WARNING
Install the unit ONLY in locations where the doors of the
occupied space are NOT tight fitting.
WARNING
When using safety shut-off valves, make sure to install
measures such as a bypassing piping with a pressure relief
valve (from liquid pipe to gas pipe). When the safety shut-
off valves close and no measures are installed, increased
pressure may damage the liquid piping.
To determine the minimum number of appropriate
measures
For occupancies other than on the lowest underground floor of
the building
If the total refrigerant charge
(kg) divided by the room
volume(a) (m3) is…
…the number of appropriate
measures must be at least…
<QLMV 0
>QLMV and <QLAV 1
>QLAV 2
(a) For occupied spaces with a floor area exceeding 250m2, use
250m2 as the floor area for determination of the room volume
(Example: even if the room area is 300m2 and the room height
is 2.5m, calculate the room volume as 250m2×2.5m=625m3)
Example: Total refrigerant charge in the system is 45kg and room
volume is 300 m3. 45/300=0.15, which is >QLMV (0.074) and
<QLAV (0.18), therefore install at least 1 appropriate measure in the
room.
A (kg)
B (m³)
0
0100 15050 200 250 300 350 450 550400 500 600 650 700 750 800 850 900 950 1000
5
10
15
20
25
30
35
40
45
50
55
60
65
70
c
b
a
QLMVQLAV
 12‒1 Example graph for calculation
ARefrigerant charge
BRoom volume
a2 appropriate measures required
b1 appropriate measure required
cNo measure required
For occupancies on the lowest underground floor of the
building
If the total refrigerant charge
(kg) divided by the room
volume(a) (m3) is…
…the number of appropriate
measures must be at least…
<RCL 0
>RCL and ≤QLMV 1
>QLMV and <QLAV 2
>QLAV Value CANNOT be exceeded!
(a) For occupied spaces with a floor area exceeding 250m2, use
250m2 as the floor area for determination of the room volume
(Example: even if the room area is 300m2 and the room height
is 2.5m, calculate the room volume as 250m2×2.5m=625m3)
Example: Total refrigerant change in the system is 45kg and room
volume is 300m3. 45/300=0.15, which is >RCL (0.072) and <QLAV
(0.18), therefore install at least 2 appropriate measures in the room.
A (kg)
B (m³)
0
0100 15050 200 250 300 350 450 550400 500 600 650 700 750 800 850 900 950 1000
5
10
15
20
25
30
35
40
45
50
55
60
65
70
dba
RCLQLAV QLMV
c
 12‒2 Example graph for calculation
ARefrigerant charge limit
BRoom volume
aInstallation is not allowed
b2 appropriate measures required
c1 appropriate measure required
dNo measure required
INFORMATION
Even if there is no refrigerating system on the lowest floor,
where the largest system charge (kg) in the building
divided by total volume of the lowest floor (m3) exceed the
value for QLMV, provide a mechanical ventilation in
accordance with EN 378-3:2016.

12 Unit installation
Installation and operation manual
18
LRYEN10A7Y1+LRNUN5A7Y1
CO₂ Conveni-Pack outdoor unit and capacity up unit
4P605461-1D – 2023.08
12.2 Opening and closing the unit
12.2.1 To open the outdoor unit
DANGER: RISK OF ELECTROCUTION
DANGER: RISK OF BURNING/SCALDING
1Remove the screws of the small front plates.
a b
8×
3×
aOutdoor unit
bCapacity up unit
2Remove the front panels.
a b
4×
12
×
aOutdoor unit
bCapacity up unit
3Remove the small front plates of each removed front panel.
1
11
2
2×
1×
a b
2
a(If applicable) Small front plate left
bSmall front plate right
Once the front plates open, the electrical component box can be
accessed. See "12.2.2To open the electrical component box of the
outdoor unit"[418].
For service purposes, the pushbuttons on the main PCB (located
behind the middle front panel) need to be accessed. To access
these pushbuttons, the electrical component box cover does not
need to be opened. See "16.1.2 To access the field setting
components"[440].
12.2.2 To open the electrical component box of
the outdoor unit
NOTICE
Do NOT apply excessive force when opening the
electronic component box cover. Excessive force can
deform the cover, resulting in entering of water to cause
equipment failure.
Electrical component boxes of the outdoor unit
The electrical component boxes behind the left, middle and right
front panel are all opened in the same way. The main switchbox is
installed behind the middle panel.
12
×
Electrical component box of the capacity up unit
4×
12.2.3 To close the outdoor unit
NOTICE
When closing the outdoor unit cover, make sure that the
tightening torque does NOT exceed 3.98N•m.
1Reinstall the small front plates of each removed front panel.
1
2
2
1
2×
1×
a b
a(If applicable) Small front plate left
bSmall front plate right
2Reinstall the front panels.

12 Unit installation
Installation and operation manual
19
LRYEN10A7Y1+LRNUN5A7Y1
CO₂ Conveni-Pack outdoor unit and capacity up unit
4P605461-1D – 2023.08
a b
12
×
12
×
4×
aOutdoor unit
bCapacity up unit
3Attach the small front plates to the front panels.
a b
3×
8×
aOutdoor unit
bCapacity up unit
12.3 Mounting the outdoor unit
12.3.1 To provide the installation structure
Make sure the unit is installed level on a sufficiently strong base to
prevent vibration and noise.
For more information, see chapter "Installation site requirements of
the outdoor unit" in the installer and user reference guide.
NOTICE
▪ When the installation height of the unit needs to be
increased, do NOT use stands to only support the
corners.
▪ Stands under the unit must be at least 100mm wide.
NOTICE
The height of the foundation must at least be 150mm from
the floor. In heavy snowfall areas, this height should be
increased up to the average expected snow level,
depending on the installation place and condition.
Outdoor unit
Capacity up unit
▪ The preferred installation is on a solid longitudinal foundation
(steel beam frame or concrete). The foundation must be larger
than the grey marked area.
631
729
765
≥765
BC
A
497
A
B
631
729
765
≥765 (mm)
1 2
Minimum foundation
1LRYEN10*
2LRNUN5*
Unit A B C
LRYEN10* 1940 1102 193
LRNUN5* 635 497 —

13 Piping installation
Installation and operation manual
20
LRYEN10A7Y1+LRNUN5A7Y1
CO₂ Conveni-Pack outdoor unit and capacity up unit
4P605461-1D – 2023.08
12.3.2 To install the outdoor unit
1Position the unit onto the installation structure. See also:
"10.1.3To handle the outdoor unit"[413].
2Fix the unit onto the installation structure. See also "12.3.1To
provide the installation structure"[419]. Fasten the unit in place
using four foundation bolts M12. It is best to screw in the
foundation bolts until their length remains 20 mm above the
foundation surface.
20 mm
NOTICE
When installed in a corrosive environment, use a nut with
plastic washer (a) to protect the nut tightening part from
rust.
a
3Remove the slings.
4Remove the cardboard protection.
12.3.3 To provide drainage
Make sure that condensation water can be evacuated properly.
NOTICE
Prepare a water drainage channel around the foundation to
drain waste water from around the unit. When the outdoor
temperatures are negative, the drained water from the
outdoor unit will freeze up. If the water drainage is not
taken care of, the area around the unit might be very
slippery.
13 Piping installation
13.1 Preparing refrigerant piping
13.1.1 Refrigerant piping requirements
WARNING
The unit is partially factory charged with refrigerant R744.
NOTICE
Do NOT reuse piping from previous installations.
NOTICE
Refrigerant R744 requires strict cautions for keeping the
system clean and dry. Foreign materials (including mineral
oils or moisture) should be prevented from getting mixed
into the system.
NOTICE
The piping and other pressure-containing parts shall be
suitable for refrigerant and oil. Use K65 (or equivalent)
copper-iron alloy tube system for high-pressure
applications with a working pressure of 120 bar gauge at
the air conditioner side and 90 bar gauge at the
refrigeration side.
NOTICE
NEVER use standard hoses and manometers. Use ONLY
equipment that is designed to use with R744.
▪ Foreign materials inside pipes (including oils for fabrication) must
be ≤30mg/10m.
NOTICE
If the ability to close the stop valves for field piping is
wanted, the installer MUST install a pressure relief valve
on the following piping:
▪ Outdoor unit to refrigeration indoor units: on liquid
piping
▪ Outdoor unit to air conditioning indoor units: on liquid
piping AND gas piping
13.1.2 Refrigerant piping material
▪Piping material: K65 and equivalent piping. For the maximum
system operation pressure in field piping, refer to "5.3Field piping
pressure"[410].
▪Piping temper grade and thickness:
Piping refrigeration unit
Outer
diameter
(Ø)
Temper
grade
Thickness
(t) (a)
Design
pressure
Liquid
piping
12.7mm
(1/2")
R300 0.85mm 120 bar
gauge
t
Ø
Gas
piping
15.9mm
(5/8")
R300 1.05mm 120 bar
gauge
(a) Depending on the applicable legislation and the maximum
working pressure of the unit (see "PS High" on the unit name
plate), larger piping thickness might be required.
Piping air conditioning unit
Outer
diameter
(Ø)
Temper
grade
Thickness
(t)(a)
Design
pressure
Liquid
piping
15.9mm
(5/8")
R300 1.05mm 120 bar
gauge
t
Ø
Gas
piping
19.1mm
(3/4")
R300 1.30mm 120 bar
gauge
(a) Depending on the applicable legislation and the maximum
working pressure of the unit (see "PS High" on the unit name
plate), larger piping thickness might be required.
13.1.3 Refrigerant piping length and height
difference
Requirements and limits
The piping lengths and height differences must comply with the
following requirements. For an example, see "13.1.4 To select the
piping size"[421].
Requirement Limit
LRYEN10* LRYEN10* +
LRNUN5*
Maximum piping length
▪ Example refrigeration side:
▪ A+B+C+D+(E or F)(a)≤Limit
▪ a+c+d+(e or f)(a)≤Limit
▪ Example air conditioner side:
▪ A2+B2+(C2 or D2)(a)≤Limit
▪ a2+b2+(c2 or d2)(a)≤Limit
Refrigeration side: 130m(b)
Air conditioning side: 130m