LG Multi V miniARUN Series User manual

System
Outdoor Unit
INSTALLATION MANUAL
LG
MODELS: ARUN Series ARUV Series
(1Ø, 220~240V, 50Hz / 1Ø, 220V, 60Hz)
website http://www.lgservice.com
IMPORTANT
• Please read this installation manual completely before
installing the product.
• Installation work must be performed in accordance with
the national wiring standards by authorized personnel
only.
• Please retain this installation manual for future reference
after reading it thoroughly.
R410A
ENGLISH ITALIANO ESPAÑOL FRANÇAIS DEUTSCH
PORTUGUESE

2Outdoor Unit
ARUN Series Outdoor Unit Installation Manual
TABLE OF CONTENTS
Safety Precautions............................3
Installation Process ..........................7
Outdoor Units Information ...............8
Before installation.............................9
Select the Best Location ................10
Installation Space............................11
Installation .......................................15
Refrigerant piping ...........................18
Electrical Wiring ..............................37
Test Run ...........................................51
Caution For Refrigerant Leak.........60
Installation guide at the seaside....62

Safety Precautions
Safety Precautions
To prevent injury to the user or other people and property damage, the following instructions must
be followed.
■Incorrect operation due to ignoring instruction will cause harm or damage. The seriousness is
classified by the following indications.
■Meanings of symbols used in this manual are as shown below.
This symbol indicates the possibility of death or serious injury.
This symbol indicates the possibility of injury or damage to properties only.
Be sure not to do.
Be sure to follow the instruction.
■Installation
Have all electric work done by a licensed
electrician according to "Electric Facility
Engineering Standard" and "Interior Wire
Regulations" and the instructions given in
this manual and always use a special circuit.
• If the power source capacity is inadequate or
electric work is performed improperly, electric
shock or fire may result.
Ask the dealer or an authorized technician to
install the air conditioner.
• Improper installation by the user may result in
water leakage, electric shock, or fire.
Always ground the product.
• There is risk of fire or electric shock.
Always intstall a dedicated circuit and breaker.
• Improper wiring or installation may cause fire or
electric shock.
ENGLISH
Installation Manual 3
For re-installation of the installed product,
always contact a dealer or an Authorized
Service Center.
• There is risk of fire, electric shock, explosion, or
injury.
Do not install, remove, or re-install the unit
by yourself (customer).
• There is risk of fire, electric shock, explosion, or
injury.
Do not store or use flammable gas or
combustibles near the air conditioner.
• There is risk of fire or failure of product.
Use the correctly rated breaker or fuse.
• There is risk of fire or electric shock.
Prepare for strong wind or earthquake and
install the unit at the specified place.
• Improper installation may cause the unit to
topple and result in injury.
Do not install the product on a defective
installation stand.
• It may cause injury, accident, or damage to the
product.

Ventilate before operating air conditioner
when gas leaked out.
• It may cause explosion, fire, and burn.
Securely install the cover of control box and
the panel.
• If the cover and panel are not installed securely,
dust or water may enter the outdoor unit and fire
or electric shock may result.
If the air conditioner is installed in a small room, measures must be taken to prevent the
refrigerant concentration from exceeding the safety limit when the refrigerant leaks.
• Consult the dealer regarding the appropriate measures to prevent the safety limit from being
exceeded. Should the refrigerant leak and cause the safety limit to be exceeded, harzards due to lack
of oxygen in the room could result.
■Operation
Do not damage or use an unspecified power
cord.
• There is risk of fire, electric shock, explosion, or
injury.
Use a dedicated outlet for this appliance.
• There is risk of fire or electrical shock.
Be cautious that water could not enter the
product.
• There is risk of fire, electric shock, or product
damage.
Do not touch the power switch with wet
hands.
• There is risk of fire, electric shock, explosion, or
injury.
4Outdoor Unit
Safety Precautions
When installing and moving the air conditioner
to another site, do not charge it with a
different refrigerant from the refrigerant
specified on the unit.
• If a different refrigerant or air is mixed with the
original refrigerant, the refrigerant cycle may
malfunction and the unit may be damaged.
Do not reconstruct to change the settings of
the protection devices.
• If the pressure switch, thermal switch, or other
protection device is shorted and operated
forcibly, or parts other than those specified by
LGE are used, fire or explosion may result.
When the product is soaked (flooded or
submerged), contact an Authorized Service
Center.
• There is risk of fire or electric shock.
Be cautious not to touch the sharp edges
when installing.
• It may cause injury.
Take care to ensure that nobody could step
on or fall onto the outdoor unit.
• This could result in personal injury and product
damage.
Do not open the inlet grille of the product
during operation. (Do not touch the
electrostatic filter, if the unit is so equipped.)
• There is risk of physical injury, electric shock, or
product failure.

Installation Manual 5
ENGLISH
Safety Precautions
Use power cables of sufficient current
carrying capacity and rating.
• Cables that are too small may leak, generate
heat, and cause a fire.
Do not use the product for special purposes,
such as preserving foods, works of art, etc. It
is a consumer air conditioner, not a precision
refrigeration system.
• There is risk of damage or loss of property.
Keep the unit away from children. The heat
exchanger is very sharp.
• It can cause the injury, such as cutting the finger.
Also the damaged fin may result in degradation
of capacity.
When installting the unit in a hospital,
communication station, or similar place,
provide sufficient protection against noise.
• The inverter equipment, private power generator,
high-frequency medical equipment, or radio
communication equipment may cause the air
conditioner to operate erroneously, or fail to
operate. On the other hand, the air conditioner may
affect such equipment by creating noise that
disturbs medical treatment or image broadcasting.
Do not install the product where it is exposed to sea wind (salt spray) directly.
• It may cause corrosion on the product. Corrosion, particularly on the condenser and evaporator fins,
could cause product malfunction or inefficient operation.
■Installation
Always check for gas (refrigerant) leakage
after installation or repair of product.
• Low refrigerant levels may cause failure of
product.
Do not install the product where the noise or
hot air from the outdoor unit could damage
the neighborhoods.
• It may cause a problem for your neighbors.
Keep level even when installing the product.
• To avoid vibration or water leakage.
Do not install the unit where combustible gas
may leak.
• If the gas leaks and accumulates around the
unit, an explosion may result.
■Operation
Do not use the air conditioner in special
environments.
• Oil, steam, sulfuric smoke, etc. can significantly
reduce the performance of the air conditioner or
damage its parts.
Do not block the inlet or outlet.
• It may cause failure of appliance or accident.
Make the connections securely so that the
outside force of the cable may not be applied
to the terminals.
• Inadequate connection and fastening may
generate heat and cause a fire.
Be sure the installation area does not
deteriorate with age.
• If the base collapses, the air conditioner could
fall with it, causing property damage, product
failure, or personal injury.

6Outdoor Unit
Safety Precautions
Install and insulate the drain hose to ensure that water is drained away properly based on the
installation manual.
• A bad connection may cause water leakage.
Be very careful about product transportation.
• Only one person should not carry the product if it weighs more than 20 kg.
• Some products use PP bands for packaging. Do not use any PP bands for a means of transportation.
It is dangerous.
• Do not touch the heat exchanger fins. Doing so may cut your fingers.
• When transporting the outdoor unit, suspending it at the specified positions on the unit base. Also
support the outdoor unit at four points so that it cannot slip sideways.
Safely dispose of the packing materials.
• Packing materials, such as nails and other metal or
wooden parts, may cause stabs or other injuries.
• Tear apart and throw away plastic packaging bags
so that children may not play with them. If children
play with a plastic bag which was not torn apart,
they face the risk of suffocation.
Turn on the power at least 6 hours before
starting operation.
• Starting operation immediately after turning on
the main power switch can result in severe
damage to internal parts. Keep the power switch
turned on during the operational season.
Do not touch any of the refrigerant piping
during and after operation.
• It can cause a burn or frostbite.
Do not operate the air conditioner with the
panels or guards removed.
• Rotating, hot, or high-voltage parts can cause
injuries.
Do not directly turn off the main power
switch after stopping operation.
• Wait at least 5 minutes before turning off the
main power switch. Otherwise it may result in
water leakage or other problems.
Auto-addressing should be done in condition of
connecting the power of all indoor and outdoour
units. Auto-addressing should also be done in
case of changing the indoor unit PCB.
Use a firm stool or ladder when cleaning or
maintaining the air conditioner.
• Be careful and avoid personal injury.
Do not insert hands or other objects through
the air inlet or outlet while the air conditioner
is plugged in.
• There are sharp and moving parts that could
cause personal injury.

Installation
Installation Process
The foundation must be level even
Outdoor unit foundation work
Avoid short circuits and ensure
sufficient space is allowed for service
Installation of outdoor unit
Automatic addressing of indoor unit
In the final check for 24hours at 3.8 MPa(38.7 kgf/cm
2
) there must be no drop in pressure.
Airtight test
Multiple core cable must not be used.
(suitable cable should be selected)
Electrical work
(connection circuits and drive circuits)
Make sure no gaps are left where
the insulating materials are joined
Heat insulation work
Make sure airflow is sufficient
Duct work
Adjust to downward gradient
Drain pipe work
Special attention to dryness,
cleanness and tightness
Refrigerant piping work
Check model name to make
sure the fitting is made correctly
Installation of indoor unit
Take account of gradient
of drain piping
Sleeve and insert work
Make relationship between outdoor, indoor, remote controller, and option connections clear.
(Prepare control circuit diagram)
Preparation of contract drawings
Indicate clearly who is to be responsible for switch settings
Determination of division work
The vacuum pump used must have a capacity of reaching at least 5 torr, more than 1 hour
Vacuum drying
Recharge correctly as calculated in this manual. and record the amount of added refrigerant
Additional charge of refrigerant
Make sure there are no gaps left between the facing materials used on the ceiling
Fit facing panels
Run each indoor unit in turn to make sure the pipe work has been fitted correctly
Test run adjustment
Explain the use of the system as clearly as possible to your customer and make sure all relevant
documentation is in order
Transfer to customer with explanation
Refer to automatic addressing flowchart
Preheat the crank case with the electrical heater for more than 6 hours.
(In case of outdoor temperature below 10℃)
•The above list indicates the order in which the individual work operations are normally carried out but this
order may be varied where local conditions warrants such change.
•The wall thickness of the piping should comply with the relevant local and national regulations for the
designed pressure 3.8MPa.
•Since R410A is a mixed refrigerant, the required additional refrigerant must be charged in its liquid state.(If the
refrigerant is charged in its gaseous state, its composition changes and the system will not work properly.)
ENGLISH
Installation Manual 7

8Outdoor Unit
Outdoor Units Information
Outdoor Units Information
CAUTION
Ratio of the connectable Indoor Units to the Outdoor: Within 50 ~ 130%
Ratio of running Indoor Units to the Outdoor: Within 10 ~ 100%
A combination operation over 100% cause to reduce each indoor unit capacity.
Power Supply: Outdoor Unit (1Ø, 220~240V, 50Hz/1Ø, 220V, 60Hz)
Connectable Indoor Unit
should be connected with 2 series indoor unit only.
Ex) ARNU07GSEA2
System(HP)
Model
Refrigerant Product charge kg
CF(Correction Factor) kg
Max. Connectable No. of Indoor Units
Net Weight kg
Dimensions mm
(WxHxD) inch
Connecting Pipes Liquid Pipes[mm(inch)]
Gas Pipes[mm(inch)]
45 6
ARUN40GS2 ARUN50GS2 ARUN60GS2
ARUV40GS2 ARUV50GS2 ARUV60GS2
3.7 3.7 3.7
-0.5 0 0
68 9
118 118 118
950x1,380x330 950x1,380x330 950x1,380x330
37.4x54.3x13 37.4x54.3x13 37.4x54.3x13
9.52(3/8) 9.52(3/8) 9.52(3/8)
15.88(5/8) 15.88(5/8) 19.05(3/4)

ENGLISH
Installation Manual 9
Before Installation
Before Installation
•The refrigerant R410A has the property of higher operating pressure in comparison with R22.
Therefore, all materials have the characteristics of higher resisting pressure than R22 ones and this
characteristic should be also considered during the installation.
R410A is an azeotrope of R32 and R125 mixed at 50:50, so the ozone depletion potential (ODP) of R410A is
0. These days the developed countries have approved it as the environment-friendly refrigerant and
encouraged to use it widely to prevent environment pollution.
As shown in figure below, bring the unit slowly. (Take care not to let hands or things come in contact with rear
fins.)
use only accessories and parts which are of the designated specification when installing.
CAUTION:
•The wall thickness of the piping should comply with the relevant local and national regulations for the designed
pressure 3.8MPa
•Since R410A is a mixed refrigerant, the required additional refrigerant must be charged in its liquid state.
•If the refrigerant is charged in its gaseous state, its composition changes and the system will not work properly.
•Do not place the refrigerant container under the direct rays of the sun to prevent it from exploding.
•For high-pressure refrigerant, any unapproved pipe must not be used.
•Do not heat pipes more than necessary to prevent them from softening.
•Be careful not to install wrongly to minimize economic loss because it is expensive in comparison with R22.
CAUTION:
Be very careful while carrying the product.
- Do not have only one person carry product if it is more than 20 kg.
- PP bands are used to pack some products. Do not use them as a mean for transportation because they are
dangerous.
- Do not touch heat exchanger fins with your bare hands. Otherwise you may get a cut in your hands.
- Tear plastic packaging bag and scrap it so that children cannot play with it Otherwise plastic packaging bag may
suffocate children to death.
- When carrying in Outdoor Unit, be sure to support it at four points. Carrying in and lifting with 3-point support may
make Outdoor Unit unstable, resulting in a fall.
Environment-friendly Alternative Refrigerant R410A
Transporting the Unit
Air outlet grille
Outdoor Unit
Front Rear
Intake hole
Always hold the unit by the corners, as holding
it by the side intake holes on the casing may
cause them to deform.
Corner
Handle

10 Outdoor Unit
Select the Best Location
Select the Best Location
1. Select space for installing outdoor unit, which will meet the following conditions:
•No direct thermal radiation from other heat sources
•No possibility of annoying neighbors by noise from unit
•No exposition to strong wind
•With strength which bears weight of unit
•Note that drain flows out of unit when heating
•With space for air passage and service work shown next
•Because of the possibility of fire, do not install unit to the space where generation, inflow, stagnation, and
leakage of combustible gas is expected.
•Avoid unit installation in a place where acidic solution and spray (sulfur) are often used.
•Do not use unit under any special environment where oil, steam and sulfuric gas exist.
•It is recommended to fence round the outdoor unit in order to prevent any person or animal from accessing
the outdoor unit.
•If installation site is area of heavy snowfall, then the following directions should be observed.
- Make the foundation as high as possible.
- Fit a snow protection hood.
2. Select installation location considering following conditions to avoid bad condition when additionally
performing defrost operation.
•Install the outdoor unit at a place well ventilated and having a lot of sunshine in case of installing the product
at a place with a high humidity in winter (near beach, coast, lake, etc).
(Ex) Rooftop where sunshine always shines.
•Performance of heating will be reduced and preheat time of the indoor unit may be lengthened in case of
installing the outdoor unit in winter at following location:
- Shade position with a narrow space
- Location with much moisture in neighboring floor.
- Location with much humidity around.
- Location where ventilation is good.
It is recommended to install the outdoor unit at a place with a lot of sunshine as possible as.
- Location where water gathers since the floor is not even.
3. When installing the outdoor unit in a place that is constantly exposed to a strong wind like a coast or on a
high story of a building, secure a normal fan operation by using a duct or a wind shield.
•Install the unit so that its discharge port faces to the wall of the building.
Keep a distance 500mm or more between the unit and the wall surface.
•Supposing the wind direction during the operation season of the air conditioner, install the unit so that the
discharge port is set at right angle to the wind direction.
Air inlet grille
500
Blown
air
Strong
wind
Strong
wind
Turn the air outlet side toward the building's wall,
fence or windbreak screen.
Set the outlet side at a right angle
to the direction of the wind.

ENGLISH
Installation Manual 11
Installation Space
Installation Space
•The following values are the least space for installation.
If any service area is needed for service according to field circumstance, obtain enough service space.
•The unit of values is mm.
■In case of obstacles on the suction side
1. Stand alone installation
2. Collective installation
100 or
more
100 or
more 100 or
100 or
more
more
500 or less
more
1000 or
100 or
more 500 or less
more
1000 or
150 or
more 150 or
150 or
more
more
500 or less
more
1000 or
300 or
more
100 or
more 200 or
more
1000 or
more
300 or
more
100 or
more
1000 or
more 200 or
more
[Unit:mm]
[Unit:mm]

12 Outdoor Unit
Installation Space
■In case of obstacles on the discharge side
1. Stand alone installation
■In case of obstacles on the suction and the discharge side
➲ Obstacle height of discharge side is higher than the unit
1. Stand alone installation
2. Collective installation
500 or more 500 or less
more
1000 or
500 or more
1000 or more
500 or less
1000 or more
1000 or more
H
L
L > HL > H
100 or
more
500 or
more
500 or less
more
1000 or
L
H
250 or
more
1000 or
more
100 or
more
100 or
more
[Unit:mm]
[Unit:mm]

ENGLISH
Installation Manual 13
Installation Space
2. Collective installation
2. Collective installation
➲ Obstacle height of discharge side is lower than the unit
1. Stand alone installation
L > H L > H
L ≤HL≤H
L ≤HL≤H
L
H
300 or
more
1000 or
more
500 or less
50
more
1000 or
L
300 or
more
1250 or more
H
L
100 or
more
500 or
more
500 or less
more
1000 or
H
L
300 or
more
1000 or
more
H
L
300 or
more
1500 or
more
500 or less
more
1000 or
H
L
300 or
more
1500 or
more
100 or more
100 or more
5
5
5
100 or more
e
e
100 or more
e
e
[Unit:mm]
[Unit:mm]

14 Outdoor Unit
Installation Space
Collective / Continuous Installation for roof top use
Space required for collective installation and continuous installation: When installing several units, leave space
between each block as shown below considering passage for air and people.
1. One row of stand alone installation
2. Rows of collective installation (2 or more)
•L should be smaller than H
100 or
more
2000 or
more
200 or
more
1000 or
more
L
300 or
more
3000 or
more
H
600 or
more
1500 or
more
100 or
more
L ≤H
[Unit:mm]
[Unit:mm]
Seasonal wind and cautions in winter
•Sufficient measures are required in a snow area or severe cold area in winter so that product can be operated well.
•Get ready for seasonal wind or snow in winter even in other areas.
•Install a suction and discharge duct not to let in snow or rain.
•Install the outdoor unit not to come in contact with snow directly. If snow piles up and freezes on the air suction hole,
the system may malfunction. If it is installed at snowy area, attach the hood to the system.
•Install the outdoor unit at the higher installation console by 50cm than the average snowfall (annual average snowfall) if
it is installed at the area with much snowfall.
1. The height of H frame must be more than 2 times the snowfall and its width shall not exceed the width of the
product. (If width of the frame is wider than that of the product, snow may accumulate)
2. Don't install the suction hole and discharge hole of the Outdoor Unit facing the seasonal wind.

ENGLISH
Installation Manual 15
Installation
Installation
Foundation for Installation
•Check the strength and level of the installation ground so that the unit will not cause any operating vibration or
noise after installation.
•Fix the unit securely by means of the foundation bolts. (Prepare 4sets of M12 foundation bolts, nuts and
washers each which are available on the market.)
•It is best to screw in the foundation bolts until their length are 20mm from the foundation surface.
If it is necessary to prevent the unit from falling over, install as shown in the figure.
•Prepare all 4 wires as indicated in the drawing
•Unscrew the top plate at the 4 location indicated A and B
•Put the screws through the nooses and screw them back tight
A : Location of the 2 fixation holes on the front side of the unit
B : Location of the 2 fixation holes on the rear side of the unit
C : wires
[Unit:mm]
Foundation bolt executing method
200
Nut
75
75
200
Spring washer
Frame
Anti-vibration
materials Four bolt are
required
3 thread ridges
H-Beam
Concrete
base
100
AB
C

16 Outdoor Unit
Installation
Preparation of Piping
1) Cut the pipes and the cable.
■Use the accessory piping kit or the pipes purchased
locally.
■Measure the distance between the indoor and the
outdoor unit.
■Cut the pipes a little longer than measured distance.
■Cut the cable 1.5m longer than the pipe length.
2) Burrs removal
■Completely remove all burrs from the cut cross section
of pipe/tube.
■Put the end of the copper tube/pipe to downward
direction as you remove burrs in order to avoid to let
burrs drop in the tubing.
3) Flaring work
■Carry out flaring work using flaring tool as shown right.
Firmly hold copper tube in a bar(or die) as indicated
dimension in the table above.
4) Check
■Compare the flared work with figure right.
■If flare is noted to be defective, cut off the flared section
and do flaring work again.
Main cause of gas leakage is defect in flaring work. Carry out correct flaring work in the following procedure.
Pipe " A "
Gas Liquid Gas Liquid
<5.6(19,100) 12.7(1/2) 6.35(1/4) 1.6~1.8 1.1~1.3
(0.63~0.71) (0.43~0.51)
<16.0(54,600) 15.88(5/8) 9.52(3/8) 1.6~1.8 1.5~1.7
(0.63~0.71) (0.59~0.67)
<22.4(76,400) 9.52(3/4) 9.52(3/8) 1.9~2.1 1.5~1.7
(0.75~0.83) (0.59~0.67)
Indoor unit
[kW(Btu/h]
Copper
tube
90°Slanted Uneven Rough
Pipe
Reamer
Point down
Bar
Copper pipe
Clamp handle Red arrow mark
Cone
Yoke
Handle
Bar
"A"
Inclined
Inside is shining without scratches.
Smooth all round
Even length
all round
Surface
damaged Cracked Uneven thickness
= Improper flaring =
Unit : mm(inch)

ENGLISH
Installation Manual 17
Installation
1. Use the heat insulation material for the refrigerant piping which has an excellent heat-resistance (over
120°C).
2. Precautions in high humidity circumstance:
This air conditioner has been tested according to the
"ISO Conditions with Mist" and confirmed that there is
not any default. However, if it is operated for a long
time in high humid atmosphere (dew point
temperature: more than 23°C), water drops are liable
to fall. In this case, add heat insulation material
according to the following procedure:
•Heat insulation material to be prepared... EPDM
(Ethylene Propylene Diene Methylene)-over 120°C
the heat-resistance temperature.
•Add the insulation over 10mm thickness at high humidity environment.
Indoor unit
Thermal insulator
(accessory)
Fastening band
(accessory)
Refrigerant piping
HEAT INSULATION
Precautions when connecting pipes
•See the following table for flare part machining dimensions.
•When connecting the flare nuts, apply refrigerant oil to the inside and outside of the flares and turn them three
or four times at first. (Use ester oil or ether oil.)
•See the following table for tightening torque.(Applying too much torque may cause the flares to crack.)
•After all the piping has been connected, use nitrogen to perform a gas leak check.
CAUTION
Always use a charge hose for service port connection.
After tightening the cap, check that no refrigerant leaks are
present.
When loosening a flare nut, always use two wrenches in
combination, When connecting the piping, always use a spanner
and torque wrench in combination to tighten the flare nut.
When connecting a flare nut, coat the flare(inner and outer faces)
with oil for R410A(PVE) and hand tighten the nut 3 to 4 turns as
the initial tightening.
FLARE SHAPE and FLARE NUT TIGHTENING TORQUE
90°±2
45°
±2
A
R=0.4~0.8
Pipe size Tightening Torque(kgf·cm) A(mm) flare shape
9.52 340~420 12.6~13.0
12.7 550~660 15.8~16.2
15.88 630~820 19.0~19.4
Union

18 Outdoor Unit
Refrigerant Piping
Refrigerant Piping
■Connecting the pipes to the outdoor unit
1. Liquid pipe
•Align the center of the pipings and sufficiently tighten
the flare nut with fingers.
•Finally, tighten the flare nut with torque wrench until
the wrench clicks.
- When tightening the flare nut with torque wrench,
ensure the direction for tightening follows the arrow
on the wrench.
■ Possible direction for field piping
•For the units with capacity more than 42 kBtu/h, the
installation piping is connectable in four directions.(refer
to figure 1)
•When connecting in a downward direction, knock out the
knockout hole of the base pan.
(refer to figure 2)
■Preventing foreign objects from
entering (Figure3)
•Plug the pipe through-holes with putty or insulation
material(procured locally)to stop up all gaps,as shown in
the figure 3.
•Insects or small animals entering the outdoor unit may
cause a short circuit in the electrical box.
2. Gas pipe
•Braze suitable field piping with service valve of gas pipe.
<Gas pipe>
<Liquid pipe>
Torque wrench
Wet towel
Forward Sideways
Backward
Knock-out Base pan
Downward
Gas side piping
(Bigger Dia.)
Liquid side piping
(Smaller Dia.)
Putty or insulating material
(produced locally)
Drain hose
Connecting wire
Connection pipe
<Figure 2>
<Figure 1> <Figure 3>
mm inch kgf.m
Ø9.52 3/8 3.4~4.2
Outside diameter Torque
CAUTION
Take care so that there is no thermal damage on the service valves of the outdoor unit.
(Especially packing part of service port.) Wrap the service valve with a wet towel when brazing it as shown figure above.
CAUTION
•Make sure that pipe doesn't contact with the compressor terminal cover
and comp bolt.
•Always insulate the liquid and gas-side field piping and branch.

ENGLISH
Installation Manual 19
Refrigerant Piping
Cautions for Handling Service Valve
How to Use the Shut-Off Valve
CAUTION
Make sure to keep the valve open during operation
•The service valves are closed at shipment from the factory
The names of parts of the service valve are
shown in the figure.
•since the side boards may be deformed if only a torque wrench is used when loosening or tightening flare nuts,
always lock the shut-off valve with a wrench and then use a torque wrench.
Do not place wrenches on the valve cover.
Do not apply force on the valve cover, this may result in a refrigerant leak.
Use hexagonal wrenches 4mm or 6mm
•Opening the valve
1. Place the hexagon wrench on the valve bar and turn counter-clockwise.
2. Stop when the valve bar no longer turns. It is now open.
•Closing the valve
1. Place the hexagon wrench on the valve bar and turn clockwise.
2. Stop when the valve bar no longer turns. It is now closed.
1
2
3
4
<Liquid pipe>
Direction to open
<Gas pipe>
Direction to open
1
2
1. Service point
2. Shut-off Valve
3. Filed piping connection
4. Valve cover
1. Spanner
2. Torque wrench

20 Outdoor Unit
Refrigerant Piping
To Outdoor Unit
Sealed Piping
AA
B
A
B
1. Use the following materials for refrigerant piping.
•Material: Seamless phosphorous deoxidized copper pipe
•Wall thickness : Comply with the relevant local and national regulations for the designed pressure
3.8MPa. We recommend the following table as the minimum wall thickness.
2. Commercially available piping often contains dust and other materials. Always blow it clean with a dry inert
gas.
3. Use care to prevent dust, water or other contaminants from entering the piping during installation.
4. Reduce the number of bending portions as much as possible, and make bending radius as big as possible.
5. Always use the branch piping set shown below, which are sold separately.
6. If the diameters of the branch piping of the designated refrigerant piping differs, use a pipe cutter to cut
the connecting section and then use an adapter for connecting different diameters to connect the piping.
7. Always observe the restrictions on the refrigerant piping (such as rated length, difference in height, and
piping diameter).
Failure to do so can result in equipment failure or a decline in heating/cooling performance.
8. A second branch cannot be made after a header. (These are shown by .)
9. The Multi V will stop due to an abnormality like excessive or insufficient refrigerant. At such a time, always
properly charge the unit. When servicing, always check the notes concerning both the piping length and
the amount of additional refrigerant.
10. Never use refrigerant to perform an air purge. Always evacuate using a vacuum pump.
11. Always insulate the piping properly. Insufficient insulation will result in a decline in heating/cooling
performance, drip of condensate and other such problems.
12. When connecting the refrigerant piping, make sure the service valves of the Outdoor Unit is completely
closed (the factory setting) and do not operate it until the refrigerant piping for the Outdoor and Indoor
Units has been connected, a refrigerant leakage test has been performed and the evacuation process
has been completed.
13. Always blow nitrogen into pipe which is brazed. Always use a non-oxidizing brazing material for brazing
the parts and do not use flux. If not, oxidized film can cause clogging or damage to the compressor unit
and flux can harm the copper piping or refrigerant oil.
Caution
ARBLN01620 ARBLN03320 ARBL054 ARBL057 ARBL1010
ARBLN07120 ARBLN14520 ARBL104 ARBL107 ARBL2010
Y branch Header
4 branch 7 branch 10 branch
0.99
22.2
1.1
31.8
1.21
34.9
1.35
38.1
1.43
41.3
0.99
28.58
0.99
25.4
0.99
19.05
0.99
15.88
0.8
12.7
0.8
9.52
0.8
6.35
Minimum
thickness [mm]
Outer diameter
[mm]