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
YX
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
4P605461-1 – 2020.04
Table of contents
1 About the documentation 3
1.1 About this document.................................................................. 3
2 Specific installer safety instructions 4
For the user 5
3 User safety instructions 5
3.1 General...................................................................................... 5
3.2 Instructions for safe operation ................................................... 6
4 About the system 8
4.1 System layout............................................................................ 8
5 Operation 8
5.1 Operation range ........................................................................ 8
6 Maintenance and service 8
6.1 About the refrigerant.................................................................. 9
6.2 Recommended maintenance and inspection ............................ 9
7 Troubleshooting 9
7.1 Error codes: Overview............................................................... 10
8 Relocation 10
9 Disposal 10
For the installer 10
10 About the box 10
10.1 Outdoor unit............................................................................... 10
10.1.1 To unpack the outdoor unit ......................................... 10
10.1.2 To handle the outdoor unit.......................................... 11
10.1.3 To remove the accessories from the outdoor unit....... 11
11 About the units and options 11
11.1 About the outdoor unit ............................................................... 11
11.2 System layout............................................................................ 12
11.3 Indoor unit constraints ............................................................... 12
12 Unit installation 12
12.1 Preparing the installation site .................................................... 12
12.1.1 Installation site requirements of the outdoor unit ........ 12
12.1.2 Additional installation site requirements of the
outdoor unit in cold climates ....................................... 13
12.1.3 Additional installation site requirements for CO₂
refrigerant.................................................................... 13
12.2 Opening and closing the unit..................................................... 14
12.2.1 To open the outdoor unit............................................. 14
12.2.2 To open the electrical component box of the outdoor
unit .............................................................................. 14
12.2.3 To close the outdoor unit ............................................ 15
12.3 Mounting the outdoor unit.......................................................... 15
12.3.1 To provide the installation structure............................ 15
12.3.2 To install the outdoor unit............................................ 16
12.3.3 To provide drainage.................................................... 17
13 Piping installation 17
13.1 Preparing refrigerant piping....................................................... 17
13.1.1 Refrigerant piping requirements.................................. 17
13.1.2 Refrigerant piping material.......................................... 17
13.1.3 Refrigerant piping length and height difference .......... 17
13.1.4 To select the piping size ............................................. 18
13.1.5 To select refrigerant branch kits.................................. 19
13.1.6 To select expansion valves for refrigeration ............... 19
13.2 Using stop valves and service ports........................................... 19
13.2.1 To handle the stop valve.............................................. 19
13.2.2 To handle the service port ........................................... 20
13.2.3 Tightening torques ....................................................... 21
13.3 Connecting the refrigerant piping ............................................... 21
13.3.1 To remove the spun pipes ........................................... 21
13.3.2 To connect the refrigerant piping to the outdoor unit ... 21
13.3.3 Guidelines to connect T-joints...................................... 22
13.3.4 Guidelines to install a dryer.......................................... 23
13.4 Checking the refrigerant piping .................................................. 23
13.4.1 Checking refrigerant piping: Setup............................... 23
13.4.2 To perform a leak test .................................................. 23
13.4.3 To perform vacuum drying ........................................... 23
13.5 Insulating the refrigerant piping .................................................. 24
14 Charging refrigerant 24
14.1 Precautions when charging refrigerant....................................... 24
14.2 To determine additional refrigerant amount: method 1 .............. 25
14.3 To determine additional refrigerant amount: method 2 .............. 25
14.4 To charge refrigerant.................................................................. 26
15 Electrical installation 26
15.1 About electrical compliance........................................................ 27
15.2 Field wiring: Overview ................................................................ 28
15.3 Guidelines when knocking out knockout holes........................... 29
15.4 Guidelines when connecting the electrical wiring....................... 29
15.5 Specifications of standard wiring components ........................... 29
15.6 Connections to the outdoor unit ................................................. 30
15.6.1 Low voltage wiring – Outdoor unit................................ 30
15.6.2 High voltage wiring – Outdoor unit............................... 31
15.7 Connections to the capacity up unit ........................................... 31
15.7.1 Low voltage wiring – Capacity up unit.......................... 32
15.7.2 High voltage wiring – Capacity up unit......................... 32
16 Configuration 33
16.1 Making field settings................................................................... 33
16.1.1 About making field settings .......................................... 33
16.1.2 To access the field setting components....................... 33
16.1.3 Field setting components ............................................. 34
16.1.4 To access mode 1 or 2 ................................................ 34
17 Commissioning 34
17.1 Precautions when commissioning .............................................. 34
17.2 Checklist before commissioning................................................. 35
17.3 About the test run ....................................................................... 35
17.4 To perform a test run (7-segment display) ................................. 35
17.4.1 Test run checks............................................................ 36
17.4.2 Correcting after abnormal completion of the test run... 37
17.5 Logbook...................................................................................... 37
18 Troubleshooting 37
18.1 Solving problems based on error codes..................................... 37
18.1.1 Error codes: Overview ................................................. 37
19 Technical data 39
19.1 Piping diagram: Outdoor unit...................................................... 39
19.2 Piping diagram: Capacity up unit................................................ 40
19.3 Wiring diagram: Outdoor unit ..................................................... 41
1 About the documentation
1.1 About this document
Target audience
Authorised installers + end users

2 Specific installer safety instructions
Installation and operation manual
4
LRYEN10A7Y1+LRNUN5A7Y1
CO₂ Conveni-Pack outdoor unit and capacity up unit
4P605461-1 – 2020.04
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 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 Specific installer safety
instructions
Always observe the following safety instructions and regulations.
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.
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13]).
▪ Make sure to install a CO2 leak detector (field supply)
and enable the function for refrigerant leak detection
(see the installation manual of the indoor unit (air
conditioning)).
WARNING
Make sure installation, servicing, maintenance, repair and
applied materials follow the instructions from Daikin and, in
addition, comply with applicable legislation and are
performed by qualified persons only. In Europe and areas
where IEC standards apply, EN/IEC 60335-2-40 is the
applicable standard.
Installation site (see "12.1Preparing the installation
site"[
4
12])
CAUTION
Appliance not accessible to the general public, install it in a
secured area, protected from easy access.
This unit, both indoor and outdoor, is suitable for
installation in a commercial and light industrial
environment.
CAUTION
If the safety valve operates, CO2 gas may concentrate
inside the casing of the outdoor unit. Therefore, you should
ALWAYS take a distance for your own safety. You can
close the outdoor unit if your portable CO2 detector
confirmed that the concentration of CO2 is at an acceptable
level. For example, if 7 kg CO2 is released inside the
casing, it takes around 5minutes until the concentration of
CO2 is low enough.
WARNING
Do NOT place objects below the indoor and/or outdoor unit
that may get wet. Otherwise condensation on the main unit
or refrigerant pipes, air filter dirt or drain blockage may
cause dripping, and objects under the unit may get dirty or
damaged.
WARNING
Install the unit only in locations where the doors of the
occupied space are not tight fitting.
NOTICE
Discharge from pressure relief devices shall take place so
that persons and property are not endangered by the
released refrigerant.
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
Instructions on how to fix the unit in a correct way can be
found in "12Unit installation"[412].
Refrigerant piping installation (see "13Piping
installation"[
4
17])
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.
CAUTION
Do NOT reuse piping from previous installations.

3 User safety instructions
Installation and operation manual
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LRYEN10A7Y1+LRNUN5A7Y1
CO₂ Conveni-Pack outdoor unit and capacity up unit
4P605461-1 – 2020.04
CAUTION
Install the refrigerant piping or components in a position
where they are unlikely to be exposed to any substance
which may corrode components containing refrigerant,
unless the components are constructed of materials that
are inherently resistant to corrosion or are suitably
protected against corrosion.
WARNING
▪ Use K65 piping for high-pressure applications with a
working pressure of 120bar or 90bar, depending on its
location in the system.
▪ Use K65 unions and fittings approved for a working
pressure of 120bar or 90bar, depending on its location
in the system.
▪ Only brazing is allowed for connection of pipes. No
other types of connections are allowed.
▪ Expanding of pipes is not allowed.
INFORMATION
To complete the refrigerating system, additional charging
of refrigerant is required. See "14 Charging
refrigerant"[424].
Electrical installation (see "15Electrical installation"[
4
26])
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.
WARNING
Use an all-pole disconnection type breaker with at least
3 mm between the contact point gaps that provide full
disconnection under overvoltage category III.
WARNING
If the supply cord is damaged, it MUST be replaced by the
manufacturer, its service agent or similarly qualified
persons in order to avoid a hazard.
INFORMATION
A wiring diagram can be found on the applicance and its
description of the connections and wiring to external
control devices and supply cord can be found in
"19.3Wiring diagram: Outdoor unit"[441].
INFORMATION
The method of connection of the appliance to the electrical
supply and interconnection of separate components is
described in "15.2Field wiring: Overview"[428].
INFORMATION
Details of type and rating of fuses, or rating of circuit
breakers are described in "15Electrical installation"[426].
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 is not intended for use
by persons, including children, with
reduced physical, sensory or mental
capabilities, or lack of experience and
knowledge, unless they have been

3 User safety instructions
Installation and operation manual
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4P605461-1 – 2020.04
given supervision or instruction
concerning use of the appliance by a
person responsible for their safety.
Children should be supervised to
ensure that they do not play with the
appliance.
Cleaning and user maintenance must
not be carried out 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: the dismantling of the system, treatment of
the refrigerant, of oil and of other parts must be done by an
authorized installer and must comply with applicable legislation.
Units must be treated at a specialized treatment facility for reuse,
recycling and recovery. By ensuring this product is disposed of
correctly, you will help to prevent potential negative consequences
for the environment and human health. For more information,
contact your installer or local authority.
▪ Batteries are marked with the following symbol:
This means that the batteries may NOT be mixed with unsorted
household waste. If a chemical symbol is printed beneath the
symbol, this chemical symbol means that the battery contains a
heavy metal above a certain concentration.
Possible chemical symbols are: Pb: lead (>0.004%).
Waste batteries must be treated at a specialized treatment facility
for reuse. By ensuring waste batteries are disposed of correctly,
you will help to prevent potential negative consequences for the
environment and human health.
3.2 Instructions for safe operation
WARNING
Do NOT modify, disassemble, remove,
reinstall or repair the unit yourself as
incorrect dismantling or installation
may cause an electric shock or fire.
Contact your dealer.
CAUTION
If this unit is equipped with an
electrically powered safety measure,
such as a CO2 refrigerant leak detector
(field supply), in order to be effective,
the unit must be electrically powered at
all times after installation, except for
short service periods.
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
▪ 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.
WARNING
This unit contains electrical and hot
parts.
WARNING
Before operating the unit, be sure the
installation has been carried out
correctly by an installer.
CAUTION
It is not good for your health to expose
your body to the air flow for a long
time.

3 User safety instructions
Installation and operation manual
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CO₂ Conveni-Pack outdoor unit and capacity up unit
4P605461-1 – 2020.04
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 expose little children, plants or
animals directly to the airflow.
WARNING
Do NOT place objects below the indoor
and/or outdoor unit that may get wet.
Otherwise condensation on the main
unit or refrigerant pipes, air filter dirt or
drain blockage may cause dripping,
and objects under the unit may get
dirty or damaged.
WARNING
Do NOT place a flammable spray
bottle near the air conditioner and do
NOT use sprays near the unit. Doing
so may result in a fire.
Maintenance and service (see "6Maintenance and
service"[
4
8])
WARNING: System contains
refrigerant under very high
pressure.
The system MUST be serviced by
qualified persons only.
CAUTION: Pay attention to the fan!
It is dangerous to inspect the unit while
the fan is running.
Be sure to turn off the main switch
before executing any maintenance
task.
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
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.
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
electric shock and injury may result.
WARNING
Be careful with ladders when working
in high places.
WARNING
Do NOT let the indoor unit get wet.
Possible consequence: Electric
shock or fire.
About the refrigerant (see "6.1About the refrigerant"[
4
9])
WARNING
▪ Do NOT pierce or burn refrigerant
cycle parts.
▪ Do NOT use cleaning materials other
than those recommended by the
manufacturer.
▪ 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 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.

4 About the system
Installation and operation manual
8
LRYEN10A7Y1+LRNUN5A7Y1
CO₂ Conveni-Pack outdoor unit and capacity up unit
4P605461-1 – 2020.04
Troubleshooting (see "7Troubleshooting"[
4
9])
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,
electric 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 electric 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.
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
ab
e e
d c
f
g
h
i
j
g
k
h
i
j
k
aMain outdoor unit (LRYEN10*)
bCapacity up unit (LRNUN5*)
cCommunication box (BRR9B1V1)
dFan (indoor unit for air conditioning)
eShowcase (indoor unit for refrigeration)
fBlower coil (indoor unit for refrigeration)
gCO2 control panel
hCO2 detector
iCO2 alarm
jCO2 ventilator
kShut off valve
5 Operation
5.1 Operation range
Use the system in the following temperature ranges for safe and
effective operation.
Refrigeration A/C cooling A/C heating
Outdoor
temperature
–20~43°CDB –5~43°CDB –20~16°CWB
Indoor
temperature
— 14~24°CWB 15~27°CDB
6 Maintenance and service
NOTICE
Never inspect or service the unit by yourself. Ask a
qualified service person to perform this work.

7 Troubleshooting
Installation and operation manual
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CO₂ Conveni-Pack outdoor unit and capacity up unit
4P605461-1 – 2020.04
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
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
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.
▪ Do NOT use cleaning materials other than those
recommended by the manufacturer.
▪ 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 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.
Cylinder types
The following cylinder types are used to charge additional R744
refrigerant:
d e
abc
aCylinder with a vapour take-off valve
bCylinder with a liquid take-off valve
cCylinder with 2 ports for take-off (vapour and liquid)
dVapour port
eLiquid port
Phase diagram of R744
P (bar)
T (C°)
0 31 100–80
1
5.2
73.8
–57
d
c
b
a
e
PPressure (in bar)
TTemperature (in °C)
aSolid phase
bLiquid phase
cVapour phase
dSupercritical fluid
eTriple point (–57°C, 5.2bar)
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 electric shock or fire. Contact your
dealer.
▪ In case of accidental refrigerant leaks, make sure there
are no naked flames. The refrigerant itself is entirely
safe, non-toxic and non-combustible, but it will
generate toxic gas when it accidentally leaks into a
room where combustible air from fan heaters, gas
cookers, etc. is present. Always have qualified service
personnel confirm that the point of leakage has been
repaired or corrected before resuming operation.
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 occur, 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, electric shock or fire. Contact your dealer.

8 Relocation
Installation and operation manual
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LRYEN10A7Y1+LRNUN5A7Y1
CO₂ Conveni-Pack outdoor unit and capacity up unit
4P605461-1 – 2020.04
The system MUST be repaired by a qualified service person.
Malfunction Measure
If 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.
Turn OFF the main power
switch.
If water leaks from the unit. Stop the operation.
The operation switch does NOT work
well.
Turn OFF the power
supply.
If 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.
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.
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 by
switching operating switch
OFF and ON. If the
problem persists, refer to
the service manual.
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.
Code Cause Solution
The air passage is blocked. Remove obstacles that
block the passage of air to
the outdoor unit.
Reversed power supply
phase malfunction
Correct phase order.
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.
System malfunction Check if the air conditioner
is connected properly.
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 for removing and reinstalling the total 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.
For the installer
10 About the box
10.1 Outdoor unit
10.1.1 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
2The unit is fixed to the pallet with bolts. Remove these bolts.

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8×8×
a b
aOutdoor unit
bCapacity up unit
WARNING
Tear apart and throw away plastic packaging bags so that
nobody, especially children, can play with them. Possible
risk: suffocation.
10.1.2 To handle the outdoor unit
CAUTION
To avoid injury, do NOT touch the air inlet or aluminium
fins of the unit.
Crane
Lift 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.
a
b
aOutdoor unit
bCapacity up unit
NOTICE
Use a belt sling of ≤20mm wide that adequately bears the
weight of the unit.
Forklift
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.
10.1.3 To remove the accessories from the
outdoor unit
Outdoor unit
c d
a b
aGeneral safety precautions
bOperation and installation manual
cCopper packings for stop valve caps (15×)
dCopper 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.

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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 A/C cooling A/C heating
Outdoor
temperature
–20~43°CDB –5~43°CDB –20~16°CWB
Indoor
temperature
— 14~24°CWB 15~27°CDB
11.2 System layout
ab
e e
d c
f
g
h
i
j
g
k
h
i
j
k
aMain outdoor unit (LRYEN10*)
bCapacity up unit (LRNUN5*)
cCommunication box (BRR9B1V1)
dFan (indoor unit for air conditioning)
eShowcase (indoor unit for refrigeration)
fBlower coil (indoor unit for refrigeration)
gCO2 control panel
hCO2 detector
iCO2 alarm
jCO2 ventilator
kShut off valve
11.3 Indoor unit constraints
NOTICE
The design pressure of the connected refrigeration parts
should be 9 MPa (90bar) or more. If this is not the case,
please contact your dealer for assistance.
WARNING
Only the refrigeration parts that are also designed to work
with CO2 shall be connected to the system.
Individual control with a remote controller
In case of a system with several air conditioners that are controlled
with the same remote controller in the same space:
Capacity class Individual control with a
remote controller
50 NOT allowed
71~112 Allowed
Restrictions
Keep the following restrictions in mind when you connect indoor
units:
Restriction Minimum/maximum
Minimum air conditioning total
capacity class
162
Maximum air conditioning total
capacity class
233
Maximum indoor units that can
be connected
≤4
For more information about the possible combinations, see the
installer and user reference guide of the outdoor unit.
12 Unit installation
12.1 Preparing the installation site
12.1.1 Installation site requirements of the
outdoor unit
Mind the spacing guidelines. See figure 1 on the inside of the front
cover.
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.

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(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).
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
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.
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.
NOTICE
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
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!

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(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.
12.2 Opening and closing the unit
12.2.1 To open the outdoor unit
DANGER: RISK OF ELECTROCUTION
DANGER: RISK OF BURNING/SCALDING
To gain access to the unit, front plates need to be opened as follows:
1Remove the screws of the small front plates:
a b
7×
2×
aOutdoor unit
bCapacity up unit
2Remove the front panels:
a b
4×
12
×
aOutdoor unit
bCapacity up unit
3Remove the small front plates:
Outdoor unit:
1
2
4
3
2×
1×
Capacity up unit:
1
2
1×
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14].
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33].
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.

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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 4.1N•m.
1Reinstall the small front plates:
Outdoor unit:
1
2
4
3
2×
1×
Capacity up unit:
2
1
2×
2Reinstall the front panels:
a b
12
×
12
×
4×
aOutdoor unit
bCapacity up unit
3Attach the small front plates to the front panels:
a b
2×
7×
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.
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.

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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
Unit A B C
LRNUN5* 635 497 —
▪ 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
▪ 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.
▪ When installed in a corrosive environment, use a nut
with plastic washer (a) to protect the nut tightening part
from rust.
a
12.3.2 To install the outdoor unit
1Transport the unit by crane or forklift and put it onto the
installation structure.
a
b
aLRYEN10*
bLRNUN5*
2Fix the unit to the installation structure.

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Installation and operation manual
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8×8×
a b
aLRYEN10*
bLRNUN5*
3If transported by crane, remove the slings.
12.3.3 To provide drainage
Make sure that condensation water can be evacuated properly.
13 Piping installation
13.1 Preparing refrigerant piping
13.1.1 Refrigerant piping requirements
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 copper-iron alloy
tube system for high-pressure applications with a working
pressure of 120bar at the air conditioner side and 90bar
at the refrigeration side.
NOTICE
Do not 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.
Caution labels on unit
Text on caution label Translation
from LRYEN10A7Y1 to
Refrigeration
from LRYEN10A7Y1 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
13.1.2 Refrigerant piping material
▪Piping material: K65 copper-iron alloy (CuFe2P), maximum
operating pressure = 120bar
▪Piping temper grade and thickness:
Piping refrigeration unit
Piping type Outer
diameter
(Ø)
Temper
grade
Thickness
(t)(a)
Liquid piping 12.7mm
(1/2")
R420
(with heat
treatment)
≥0.85mm
t
Ø
Gas piping 15.9mm
(5/8")
R300
(drawn)
≥1.05mm
(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
Piping type Outer
diameter
(Ø)
Temper
grade
Thickness
(t)(a)
Liquid piping 15.9mm
(5/8")
R300
(drawn)
≥1.05mm
t
Ø
Gas piping 19.1mm
(3/4")
R300
(drawn)
≥1.30mm
(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18].
Requirement Limit
LRYEN10* LRYEN10* +
LRNUN5*
Maximum total piping length
Examples:
▪ A+B+C+D+(E or F) (a) ≤Limit
▪ a+c+d+(e or f)(a) ≤Limit
▪ A2+B2+(C2 or D2)(a) ≤Limit
▪ a2+b2+(c2 or d2)(a) ≤Limit
Refrigeration side: 130m
Air conditioning side: 130m
Piping length between
LRYEN10* and LRNUN5*
Not specified, but piping must be
horizontal
Maximum actual piping length
▪ Example refrigeration side:
▪ C+D+(E or F)(a)
▪ c+d+(e or f)(a)
▪ c+g
▪ j
▪ Example air conditioner side:
▪ B2+(C2 or D2)(a)
▪ b2+(c2 or d2)(a)
Refrigeration side: 50m
Air conditioning side: 30m

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Requirement Limit
LRYEN10* LRYEN10* +
LRNUN5*
Maximum
height
difference
between
outdoor unit
and indoor
unit
Outdoor higher
than indoor
▪ Example: H2,
H4≤Limit
35m"To install an oil trap"[418]
Outdoor unit
lower than
indoor unit
Example: H2,
H4≤Limit
10m"To install riser
piping"[418]
Maximum height difference
between blower coil and
showcase
▪ Example: H3≤Limit
5m
Maximum height difference
between air conditioners
▪ Example: H1≤Limit
0.5m
(a) Whichever is longer
To install an oil trap
If the outdoor unit is installed higher than the indoor unit, install an oil
trap in the gas piping every 5meter. Oil traps will make the oil return
more easily.
a
c
b
aShowcase
bHeight difference = 5m
cTrap
The refrigerant suction piping must always run down:
a
b
a
b
aOutdoor unit or indoor unit
bFlow direction in refrigerant suction piping
To install riser piping
If the outdoor unit is installed lower than the indoor unit, install the
riser piping close to the indoor unit. When the compressor of the
outdoor unit starts, a correct installed riser piping will prevent liquid
from flowing back to the outdoor unit.
a
b
aOutdoor unit
bIndoor unit
cRiser piping up to indoor unit.
13.1.4 To select the piping size
Determine the proper size using the following tables and reference
figure (only for indication).
2
AA2
B2 C2
B
CD
G
J
j
f
F
E2
D2
E
H4
H3 H1 H1
H2
e d
g
c a b2
a2 e2
d2
c2
1
3
5
4
45
5
3
H4
1Capacity up unit (LRNUN5*)
2Outdoor unit (LRYEN10*)
3Indoor unit (showcase)
4Indoor unit (blower coil)
5Indoor unit (air conditioning)
A~J Liquid piping (side showcases and blower coils)
A2~E2 Liquid piping (side air conditioning)

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a~g Gas piping (side showcases and blower coils)
a2~e2 Gas piping (side air conditioning)
H1~H4 Height difference
In case the required pipe sizes (inch sizes) are not available, it is
also allowed to use other diameters (mm sizes), taken the following
into account:
▪ Select the pipe size nearest to the required size.
▪ Use the suitable adapters for the change-over from inch to mm
pipes (field supply).
▪ The additional refrigerant calculation has to be adjusted as
mentioned in the following chapters:
▪ For outdoor unit without capacity up unit: "14.2 To determine
additional refrigerant amount: method 1"[425]
▪ For outdoor with capacity up unit: "14.3To determine additional
refrigerant amount: method 2"[425]
Piping size between outdoor unit and first branch
When the equivalent pipe length between outdoor unit and the
furthest indoor unit is 90m or more (b+d), the size of the main gas
pipe (b) must be increased (size-up). If the recommended gas pipe
(size-up) is not available, you must use the standard size (which
might result in a small capacity decrease).
e
d
bc
a
aOutdoor unit
bMain gas pipe
cFirst refrigerant branch
dPiping between indoor unit and refrigerant branch
eFurthest indoor unit
System side Piping outer diameter size
(mm)(a)
Liquid side Gas side
Refrigeration Ø12.7 x t0.85
(K65)
Ø15.9 x t1.05
(K65)
Air conditioner Ø15.9 x t1.05
(K65)
Ø19.1 x t1.3
(K65)
(a) For refrigeration piping (A, B, a) and for air conditioner piping (A2,
a2)
Piping size between branching areas or between
first and second branch
Indoor unit capacity
index (kW)
Piping outer diameter size (mm)
Refrigeration side: liquid pipe(a)
x≤10.0 Ø9.5×t0.65 (K65)
10.0<x Ø12.7×t0.85 (K65)
Refrigeration side: gas pipe(a)
x≤6.5 Ø9.5×t0.65 (K65)
6.5<x≤14.0 Ø12.7×t0.85 (K65)
14.0<x Ø15.9×t1.05 (K65)
Air conditioner side: liquid pipe(b)
— Ø12.7×t0.85 (K65)
Air conditioner side: gas pipe(b)
— Ø15.9×t1.05 (K65)
(a) Piping between branching areas (C, D, c, d)
(b) Piping from first branch to second branch (B2, b2)
Piping size from branch to indoor unit
Piping outer diameter size (mm)
Gas pipe Liquid pipe
Refrigeration side(a)
Same size as C, D, c, d.
If piping sizes of the indoor units are different, connect a reducer
close to the indoor unit to align piping sizes.
Air conditioner side(b)
Ø12.7 × t0.85 (K65) Ø9.5×t0.65 (K65)
(a) Piping from branch to indoor unit (E, F, G, J, e, f, g, j)
(b) Piping from branch to indoor unit (C2, D2, E2; c2; d2; e2)
Stop valve size
Liquid side Gas side
Refrigeration side(a) Ø15.9 Ø19.1
Air conditioner
side(a)
Ø15.9 Ø15.9
(a) Reducers (field supply) may be required to connect the piping.
13.1.5 To select refrigerant branch kits
Always use K65 T-joints with a suitable design pressure for
refrigerant branching.
13.1.6 To select expansion valves for
refrigeration
The system controls liquid temperature and liquid pressure. Select
the expansion valves as indicated in the following table. These
conditions are valid for the liquid piping at the outlet of the outdoor
unit.
If showcases or blower coils are connected directly
Liquid temperature 23°C
Liquid pressure 6.8MPaG
Refrigerant condition Subcooled liquid
If capacity up unit is connected between outdoor unit and
showcases or blower coils
Liquid temperature (at outlet of capacity up
unit)
3°C
Liquid pressure (at outlet of capacity up unit) 6.8MPaG
Refrigerant condition (at outlet of capacity up
unit)
Subcooled liquid
(optional) If a pressure reduction kit is connected between
outdoor unit and showcases or blower coils
Liquid temperature (at outlet of pressure
reduction kit)
3°C
Liquid pressure (at outlet of pressure
reduction kit)
4.8~5.6MPaG
Refrigerant condition Subcooled liquid
13.2 Using stop valves and service
ports
13.2.1 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.

13 Piping installation
Installation and operation manual
20
LRYEN10A7Y1+LRNUN5A7Y1
CO₂ Conveni-Pack outdoor unit and capacity up unit
4P605461-1 – 2020.04
▪ Do NOT apply excessive force to the stop valve. Doing so may
break the valve body.
Open versus closed
All stop valves are of the backseat type and do not have a valve core
for the charge port.
A
a a
b b
B
AFully closed (connected between charge port and indoor
unit side)
BFully open (connected between outdoor unit and indoor
unit)
aTo outdoor unit
bTo indoor unit
To open the stop valve
1Remove the valve cap with 2 spanners.
2Loosen the packing holder by rotating counterclockwise from
1/8 to 1/2 turn.
3Turn the valve stem counterclockwise until it stops.
1 2 3
To close the stop valve
1Turn the valve stem clockwise until it stops. Tighten with the
appropriate tightening torque.
2Tighten the packing holder.
3Before mounting the valve cap, insert a new copper packing.
4Apply screw lock agent or silicon sealant to the screw thread
when mounting the valve cap. If not, moisture and condensing
water may penetrate and freeze between the screw thread. As
a result, refrigerant may leak and the valve cap may break.
a
b
aApply screw lock agent
bDo NOT apply screw lock agent
5Tighten the valve cap.
Also see "13.2.3Tightening torques"[421].
13.2.2 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.
The figure below shows the name of each part required in handling
the stop valve.
a
b
c
aService port cap
bCopper packing
cValve cap
Open versus closed
All service ports are of the backseat type and do not have a valve
core.
A B
AFully closed
BFully open
To open the service port
1Remove the service port cap with 2 spanners and remove the
copper packing.
2Connect the charge port to the service port.
3Remove the valve cap with 2 spanners.
4Insert a hexagonal wrench (4mm) and rotate counterclockwise
until it the end.
To close the service port
1Insert a hexagonal wrench (4mm) and rotate clockwise until the
end.
2Tighten the valve cap.
3Remove the copper packing of the service port cap.