Installation manual mini

ENGLISH
ITALIANO
ESPAÑOL
FRANCAIS
DEUTSCH
PORTUGUESE
INSTALLATION MANUAL
AIR CONDITIONER
• 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.

TYPE : System

P/NO : MFL62603701 www.lge.com

ARUN/ARUV Series Outdoor Unit Installation Manual

TABLE OF CONTENTS
Safety Precautions .......................................................................................................3

Installation Process .....................................................................................................7

Outdoor Units Information ..........................................................................................8

Before installation ......................................................................................................10

Select the Best Location............................................................................................11

Installation Space.......................................................................................................12

Installation ..................................................................................................................16

Refrigerant piping ......................................................................................................20

Electrical Wiring .........................................................................................................40

Test Run ......................................................................................................................58

Caution For Refrigerant Leak....................................................................................70

Installation guide at the seaside ...............................................................................72

2 Outdoor Unit

Safety Precautions

Safety Precautions

ENGLISH
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.

This symbol indicates the possibility of death or serious injury.

This symbol indicates the possibility of injury or damage to properties only.
■ Meanings of symbols used in this manual are as shown below.

Be sure not to do.

Be sure to follow the instruction.

■ Installation
Have all electric work done by a licensed Ask the dealer or an authorized technician to
electrician according to "Electric Facility install the air conditioner.
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 • Improper installation by the user may result in
electric work is performed improperly, electric water leakage, electric shock, or fire.
shock or fire may result.

Always ground the product. Always intstall a dedicated circuit and breaker.
• There is risk of fire or electric shock. • Improper wiring or installation may cause fire or
electric shock.
For re-installation of the installed product, Do not install, remove, or re-install the unit
always contact a dealer or an Authorized by yourself (customer).
Service Center.
• There is risk of fire, electric shock, explosion, or • There is risk of fire, electric shock, explosion, or
injury. injury.

Do not store or use flammable gas or Use the correctly rated breaker or fuse.
combustibles near the air conditioner.
• There is risk of fire or failure of product. • There is risk of fire or electric shock.

Prepare for strong wind or earthquake and Do not install the product on a defective
install the unit at the specified place. installation stand.
• Improper installation may cause the unit to • It may cause injury, accident, or damage to the
topple and result in injury. product.

Installation Manual 3

Safety Precautions

When installing and moving the air Do not reconstruct to change the settings of
conditioner to another site, do not charge it the protection devices.
with a different refrigerant from the
refrigerant specified on the unit.
• If a different refrigerant or air is mixed with the • If the pressure switch, thermal switch, or other
original refrigerant, the refrigerant cycle may protection device is shorted and operated
malfunction and the unit may be damaged. forcibly, or parts other than those specified by
LGE are used, fire or explosion may result.

Ventilate before operating air conditioner Securely install the cover of control box and
when gas leaked out. the panel.
• It may cause explosion, fire, and burn. • 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 Use a dedicated outlet for this appliance.
cord.
• There is risk of fire, electric shock, explosion, or • There is risk of fire or electrical shock.
injury.

Be cautious that water could not enter the Do not touch the power switch with wet
product. hands.
• There is risk of fire, electric shock, or product • There is risk of fire, electric shock, explosion, or
damage. injury.

When the product is soaked (flooded or Be cautious not to touch the sharp edges
submerged), contact an Authorized Service when installing.
Center.
• There is risk of fire or electric shock. • It may cause injury.

Take care to ensure that nobody could step Do not open the inlet grille of the product
on or fall onto the outdoor unit. during operation. (Do not touch the
electrostatic filter, if the unit is so equipped.)
• This could result in personal injury and product • There is risk of physical injury, electric shock, or
damage. product failure.

4 Outdoor Unit

Safety Precautions

ENGLISH
■ Installation
Always check for gas (refrigerant) leakage Do not install the product where the noise or
after installation or repair of product. hot air from the outdoor unit could damage
the neighborhoods.
• Low refrigerant levels may cause failure of • It may cause a problem for your neighbors.
product.

Keep level even when installing the product. Do not install the unit where combustible gas
may leak.
• To avoid vibration or water leakage. • If the gas leaks and accumulates around the
unit, an explosion may result.

Use power lines of sufficient current Do not use the product for special purposes,
carrying capacity and rating. such as preserving foods, works of art, etc. It
is a consumer air conditioner, not a precision
refrigeration system.
• Cables that are too small may leak, generate • There is risk of damage or loss of property.
heat, and cause a fire.

Keep the unit away from children. The heat When installting the unit in a hospital,
exchanger is very sharp. communication station, or similar place,
provide sufficient protection against noise.
• It can cause the injury, such as cutting the finger. • The inverter equipment, private power generator,
Also the damaged fin may result in degradation high-frequency medical equipment, or radio
of capacity. 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.

■ Operation
Do not use the air conditioner in special Do not block the inlet or outlet.
environments.
• Oil, steam, sulfuric smoke, etc. can significantly • It may cause failure of appliance or accident.
reduce the performance of the air conditioner or
damage its parts.
Make the connections securely so that the Be sure the installation area does not
outside force of the cable may not be applied deteriorate with age.
to the terminals.
• Inadequate connection and fastening may • If the base collapses, the air conditioner could
generate heat and cause a fire. fall with it, causing property damage, product
failure, or personal injury.


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. Turn on the power at least 6 hours before
starting operation.

• Packing materials, such as nails and other metal or • Starting operation immediately after turning on
wooden parts, may cause stabs or other injuries. the main power switch can result in severe
• Tear apart and throw away plastic packaging bags damage to internal parts. Keep the power switch
so that children may not play with them. If children turned on during the operational season.
play with a plastic bag which was not torn apart,
they face the risk of suffocation.

Do not touch any of the refrigerant piping Do not operate the air conditioner with the
during and after operation. panels or guards removed.
• It can cause a burn or frostbite. • Rotating, hot, or high-voltage parts can cause
injuries.

Do not directly turn off the main power Auto-addressing should be done in condition of
switch after stopping operation. connecting the power of all indoor and outdoour
• Wait at least 5 minutes before turning off the units. Auto-addressing should also be done in
main power switch. Otherwise it may result in case of changing the indoor unit PCB.
water leakage or other problems.

Use a firm stool or ladder when cleaning or Do not insert hands or other objects through
maintaining the air conditioner. the air inlet or outlet while the air conditioner
is plugged in.
• Be careful and avoid personal injury. • There are sharp and moving parts that could
cause personal injury.

6 Outdoor Unit

Installation Process

Installation Process

ENGLISH
Determination of division work Indicate clearly who is to be responsible for switch settings

Make relationship between outdoor, indoor, remote controller, and option connections clear."
Preparation of contract drawings
(Prepare control circuit diagram)

Take account of gradient " The foundation must be level even
Sleeve and insert work Outdoor unit foundation work
of drain piping

Check model name to make " Avoid short circuits and ensure "
Installation of indoor unit Installation of outdoor unit
sure the fitting is made correctly sufficient space is allowed for service

Special attention to dryness, "
Refrigerant piping work
cleanness and tightness

Drain pipe work Adjust to downward gradient

Duct work Make sure airflow is sufficient

Heat insulation work
Make sure no gaps are left where "
the insulating materials are joined

Electrical work Multiple core cable must not be used."
(connection circuits and drive circuits) (suitable cable should be selected)

Airtight test" In the final check for 24hours at 3.8 MPa(38.7 kgf/cm2) there must be no drop in pressure.
"

Vacuum drying The vacuum pump used must have a capacity of reaching at least 5 torr, more than 1 hour

Additional charge of refrigerant Recharge correctly as calculated in this manual. and record the amount of added refrigerant

Fit facing panels Make sure there are no gaps left between the facing materials used on the ceiling

Refer to automatic addressing flowchart"
Automatic addressing of indoor unit Preheat the crank case with the electrical heater for more than 6 hours."
(In case of outdoor temperature below 10℃)

Test run adjustment Run each indoor unit in turn to make sure the pipe work has been fitted correctly

Transfer to customer with explanation Explain the use of the system as clearly as possible to your customer and make sure all relevant "
documentation is in order

• 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.)


Outdoor Units Information

Outdoor Model
Chassis External Apperance Phase PFC
Fan Heat Pump Cooling Only
1Ø PFC ARUN50GS2A ARUV60GS2A
ARUN60GS2A
ARUN40LS2A ARUV40LS2A
U3 2 FAN PFC ARUN50LS2A ARUV50LS2A
3Ø ARUN60LS2A ARUV60LS2A
ARUN40LS2B ARUV40LS2B
Active Filter ARUN50LS2B ARUV50LS2B
ARUN60LS2B ARUV60LS2B

U4 1 FAN 1Ø PFC ARUN40GS2A ARUV50GS2A
ARUV40GS2A

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 : 1Ø, 220~240V, 50Hz / 1Ø, 220V, 60Hz
■ Heat Pump Model
Chassis U4 U3 U3
System(HP) 4 5 6
Model ARUN40GS2A ARUN50GS2A ARUN60GS2A
Refrigerant Product charge kg 1.8 3.0 3.0
CF(Correction Factor) kg 0 0 0
Max. Connectable No. of Indoor Units 6 8 9
Net Weight(Gross Weight) kg 77 106 106
Dimensions (WxHxD) mm 950×834×330 950×1380×330 950×1380×330
inch 37.4×32.8×13.0 37.4×54.3×13.0 37.4×54.3×13.0
Connecting Pipes Liquid Pipes mm 9.52 9.52 9.52
inch 3/8 3/8 3/8
Gas Pipes mm 15.88 15.88 19.05
inch 5/8 5/8 3/4
Connection Type FLARE BRAZING BRAZING

8 Outdoor Unit

■ Cooling Only Model

ENGLISH
Chassis U4 U4 U3
System(HP) 4 5 6
Model ARUV40GS2A ARUV50GS2A ARUN60GS2A
Refrigerant Product charge kg 1.95 1.95 3.0
CF(Correction Factor) kg 0 0 0
Net Weight(Gross Weight) kg 78 78 106
Dimensions (WxHxD) mm 950×834×330 950×834×330 950×1380×330
inch 37.4×32.8×13.0 37.4×32.8×13.0 37.4×54.3×13.0
Connecting Pipes Liquid Pipes mm 9.52 9.52 9.52
inch 3/8 3/8 3/8
Gas Pipes mm 15.88 15.88 19.05
inch 5/8 5/8 3/4
Connection Type FLARE FLARE BRAZING

Power Supply : 3Ø, 380~415V, 50Hz/ 3Ø, 380V, 60Hz
*A:PFC model, B:Active Filter model
Chassis U3 U3 U3
System(HP) 4 5 6
Model ARUN40LS2* ARUN50LS2* ARUN60LS2*
ARUV40LS2* ARUV50LS2* ARUV60LS2*
Product charge kg 3.0 3.0 3.0
Refrigerant
CF(Correction Factor) kg -0.5 0 0
Net Weight kg 107 107 107
mm 950 x 1,380 x 330 950 x 1,380 x 330 950 x 1,380 x 330
Dimensions (WxHxD)
inch 37.4 x 54.3 x 13.0 37.4 x 54.3 x 13.0 37.4 x 54.3 x 13.0
mm Ø9.52 Ø9.52 Ø9.52
Liquid Pipes
inch 3/8 3/8 3/8
Connecting Pipes
mm Ø15.88 Ø15.88 Ø19.05
Gas Pipes
inch 5/8 5/8 3/4

Connectable Indoor Unit
should be connected with "2 series" indoor unit only.

Ex) ARNU07GSEA2


Before Installation

Before Installation
Environment-friendly Alternative Refrigerant R410A
• 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.

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.

Transporting the Unit
• When carrying the suspended, unit pass the ropes between legs of base panel under the unit.
• Always lift the unit with ropes attached at four points so that impact is not applied to the unit.
• Attach the ropes to the unit at an angle of 40° or less.
• Use only accessories and parts which are of the designated specification when installing.

Air outlet grille Intake hole
Corner

Sub line

Handle

Always hold the unit by the corners, as holding A 40° or less
it by the side intake holes on the casing may
WARNING
cause them to deform.

* Product appearance may be different depending on model.

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.

10 Outdoor Unit

Select the Best Location

Select the Best Location

ENGLISH
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.

Strong
wind

Strong
wind

Blown
air
500

Air inlet grille

Turn the air outlet side toward the building's wall, Set the outlet side at a right angle
fence or windbreak screen. to the direction of the wind.


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

10
mo 0 or
r re
0o 10 0o
r
10 ore mo 0 or 10 ore
m re m

les
s ss
r o r le
0o 00
50 5

1000 or
more
1000 or
more

15
r mo0 or
0o re
10 ore 15 0o
r
m mo0 or 15 ore
re m
[Unit:mm]

2. Collective installation

ss
r le
0o
1000 or

50
more

10 10
0 0
mo 0 or mo 0 or
re 10 re 10
mo 0 or mo 0 or
re re r
20
0o
r 20 0o
mo 0 or 30 ore mo 0 or
30 ore
m
re m re
[Unit:mm]

12 Outdoor Unit

Installation Space
■ In case of obstacles on the discharge side

ENGLISH
1. Stand alone installation s
les
0 or
50

1000 or
more
re re
r mo r mo
0o 0o
50 50
s
les
0 or
2. Collective installation 50

1000 or more
10 10
mo 0 or mo 0 or
re re
re ore
r mo o rm
00o 10
00
10 [Unit:mm]

■ In case of obstacles on the suction and the discharge side
➲ Obstacle height of discharge side is higher than the unit
ss
1. Stand alone installation o r le
500

L>H L>H
1000 or
more
H
L

L
H

r
r 0o
0o 25 ore
10 ore or m
00
r
m 10 ore [Unit:mm]
0o e m
50 mor


Installation Space
s
les
0 or
50

1000 or
L>H L>H

more
H
L

10

L
0o 10
rm 0o
ore rm
r ore r
0o 0o
30 ore 30 ore
m m
ore
or orm
00 50
10 more 12
[Unit:mm]

➲ Obstacle height of discharge side is lower than the unit
1. Stand alone installation ss
r le
0o
50

1000 or
more
L≤H L≤H

H
H

L
L

r
0o
r 30 ore
0o or m
10 ore 00
r m 10 ore
0o m
50 ore
m
s
les
0 or
1000 or
more

50
L≤H L≤H
H

H
L

L

10 10
0o 0o
rm rm
ore ore
r or
0o 00
30
r more or 3 more
0o 00
150 ore 15 more [Unit:mm]
m

14 Outdoor Unit

Installation Space

Collective / Continuous Installation for roof top use

ENGLISH
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

or
100 ore
r m
0o
200 ore
m
or
200 ore
r m
0o
100more [Unit:mm]

2. Rows of collective installation (2 or more)
• L should be smaller than H

L≤H
10
mo 0 or
L
re
or
300ore
r m
0o
300more
H

or
r 600ore
0o m
150 ore [Unit:mm]
m
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.


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.

Anti-vibration
Spring washer materials
Frame Nut Concrete Four bolt are
base required
H-Beam 3 thread ridges
75
75

200

200
100

[Unit:mm]
Foundation bolt executing method

16 Outdoor Unit

Installation

Preparation of Piping

ENGLISH
Main cause of gas leakage is defect in flaring work. Carry out correct flaring work in the following procedure.

1) Cut the pipes and the cable. Copper
■ Use the accessory piping kit or the pipes purchased tube 90° Slanted Uneven Rough
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.
Pipe
Reamer
2) Burrs removal
■ Completely remove all burrs from the cut cross section
of pipe/tube. Point down
■ 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. Handle
Bar Bar
Unit : mm(inch) "A" Yoke
Indoor unit Pipe " A " Cone
[kW(Btu/h] Gas Liquid Gas Liquid
1.6~1.8 1.1~1.3
<5.6(19,100) 12.7(1/2) 6.35(1/4) Copper pipe
(0.63~0.71) (0.43~0.51)
1.6~1.8 1.5~1.7 Clamp handle
<16.0(54,600) 15.88(5/8) 9.52(3/8) Red arrow mark
(0.63~0.71) (0.59~0.67)
1.9~2.1 1.5~1.7
<22.4(76,400) 19.05(3/4) 9.52(3/8)
(0.75~0.83) (0.59~0.67)

Firmly hold copper tube in a bar(or die) as indicated
dimension in the table above. Smooth all round
Inside is shining without scratches.

4) Check
■ Compare the flared work with figure right. = Improper flaring =
■ If flare is noted to be defective, cut off the flared section
and do flaring work again.
Inclined Surface Cracked Uneven
damaged thickness
Even length
all round


Installation

Flare shape and flare nut tightening torque
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.

pipe size tightenig torque A flare shape
mm N.m(kgf.cm) mm 90° ±2

Ø9.52 32.7-39.9(327~399) 12.8-13.2 45
° ±2
A

Ø12.7 49.5-60.3(495~603) 16.2-16.6
R=0.4~0.8

Ø15.88 61.8-75.4(618~754) 19.3-19.7

CAUTION
• Always use a charge hose for service port connection.
• After tightening the cap, check that no refrigerant leaks are Union
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.

Opening shutoff valve
1. Remove the cap and turn the valve counter clockwise with the hexagon wrench.
2. Turn it until the shaft stops.
Do not apply excessive force to the shutoff valve. Doing so may break the valve body, as the valve is not a
backseat type. Always use the special tool.
3. Make sure to tighten the cap securely.

Closing shutoff valve
1. Remove the cap and turn the valve clockwise with the hexagon wrench.
2. Securely tighten the valve until the shaft contacts the main body seal.
3. Make sure to tighten the cap securely.
* For the tightening torque, refer to the table on the below.

Tightening torque

Outside diameter Torque
mm inch N.m(kgf•cm)
Ø6.35 1/4 18~25(180~250)
Ø9.52 3/8 34~42(340~420)
Ø12.7 1/2 55~66(550~660)
Ø15.88 5/8 63~82(630~820)
Ø19.05 3/4 99~121(990~1210)

18 Outdoor Unit

Installation

Heat insulation

ENGLISH
1. Use the heat insulation material for the refrigerant piping which has an excellent heat-resistance (over
120°C).
Fastening band
(accessory)
2. Precautions in high humidity circumstance:
This air conditioner has been tested according to the
"KS Standard 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 Refrigerant piping
temperature: more than 23°C), water drops are liable
Indoor unit
to fall. In this case, add heat insulation material
Thermal insulator
according to the following procedure: (accessory)
• Heat insulation material to be prepared... Adiabatic
glass wool with thickness 10 to 20mm.
• Stick glass wool on all air conditioners that are located in ceiling atmosphere.
• In addition to the normal heat insulation (thickness: more than 8mm) for refrigerant piping (gas piping: thick
piping) and drain piping, add further 10mm to 30mm thickness material.


Refrigerant Piping

Refrigerant Piping
U3 Chassis (2 Fan Model)
■ Connecting the pipes to the outdoor unit
• Braze suitable field piping with service valve of gas pipe.

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 Wet towel
service valve with a wet towel when brazing it as
shown figure above. <Liquid pipe> <Gas pipe>

■ Possible direction for field piping ■ Preventing foreign objects from
• The installation piping is connectable in four entering (Figure 4)
directions.(refer to figure 1) • Plug the pipe through-holes with putty or insulation
• When connecting in a downward direction, knock out material(procured locally)to stop up all gaps,as
the knockout hole of the base pan. shown in the figure 3.
(refer to figure2, figure3) • Insects or small animals entering the outdoor unit
may cause a short circuit in the electrical box.

<Figure 1> <Figure 4>

Liquid side piping
(Smaller Dia.)
Gas side piping
Backward (Bigger Dia.)

Downward
Forward Sideways

<Figure 2>
Connecting wire
Drain hose

Connection pipe

Putty or insulating material
(produced locally)
Knock-out Base pan

CAUTION
• You should not dame pipe/base during the work of
pipe knock out.
• Operate piping work removing burr after pipe knock
out.
Pipe knock
<Figure 3> out during the
ground piping.

20 Outdoor Unit

Refrigerant Piping

CAUTION

ENGLISH
• 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.

U4 Chassis (1Fan Model)
■ After connecting the refrigerant pipe and checking the refrigerant leakage, cover it with heat insulator and roll
around it with vinyl tape.
Tighten up the flare nut fitting on regulated torque. (Until “clatter” sounds is made at torque wrench part.)

The centers correspond with each other
Socket flare Flare nut

Screw wrench Torque wrench
Refrigerant pipe Flare nut

Cap Pipe

Pipe Pipe

■ Do not bend the pipe more than twice and work on it
making it a big half circle.
If it is folded over, cooling/heating capacity may
decrease and it could be the reason of malfunction.
Do not remove the cap on flare side until the
connection.
Dust and sand inside pipes can be the reason of
malfunction.

■ Bend it following the wall and connect to outdoor unit
valve.

Refrigerant pipe connection torque
Pipe external 6.35mm 9.52mm 12.7mm 15.88mm
diameter (1/4") (3/8") (1/2") (5/8")

Torque 180~250kgf.cm 340~420kgf.cm 550~660kgf.cm 630~820kgf.cm


Refrigerant Piping

Cautions for Handling Service Valve
• The service valves are closed at shipment from the factory

CAUTION
Make sure to keep the valve open during operation

The names of parts of the service valve are
shown in the figure.

1
1. Service point
2. Shut-off Valve
3. Filed piping connection
2 4. Valve cover
3

4

• 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.

1. Spanner
2. Torque wrench
1

2

Do not apply force on the valve cover, this may result in a refrigerant leak.

How to Use the Shut-Off Valve
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.

Direction to open Direction to open

<Liquid pipe> <Gas pipe>

22 Outdoor Unit

Refrigerant Piping

Caution

ENGLISH
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.

Outer diameter
6.35 9.52 12.7 15.88 19.05 22.2 25.4 28.58 31.8 34.9 38.1 41.3
[mm]
Minimum
0.8 0.8 0.8 0.99 0.99 0.99 0.99 0.99 1.1 1.21 1.35 1.43
thickness [mm]

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.

Header
Y branch
4 branch 7 branch 10 branch
ARBLN01621 ARBLN03321 ARBL054 ARBL057 ARBL1010
ARBLN07121 ARBLN14521 ARBL104 ARBL107 ARBL2010

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 .)

A A

B

A To Outdoor Unit
B Sealed Piping

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.


Refrigerant Piping

6
1 2 4 5

3

1 Refrigerant piping 4 Taping
2 Pipe to be brazed 5 Valve
3 Nitrogen 6 Pressure-reducing valve

WARNING
When installing and moving the air conditioner to another site, be sure to make recharge refrigerant
after perfect evacuation.
- If a different refrigerant or air is mixed with the original refrigerant, the refrigerant cycle may malfunction and
the unit may be damaged.

- After selecting diameter of the refrigerant pipe to suit total capacity of the indoor unit connected after
branching, use an appropriate branch pipe set according to the pipe diameter of the indoor unit and the
installation pipe drawing.

WARNING
Do not use anti-oxidants when brazing the pipe joints. Residue can clog pipes and break equipment.

24 Outdoor Unit

Refrigerant Piping

Selection of Refrigerant Piping

ENGLISH
Outdoor unit

Gas pipe Liquid pipe
Branching
pipe
Main pipe

Branching Indoor unit
pipe

No. Piping parts Name Selection of pipe size

Size of main pipe
Liquid pipe Gas pipe
Outdoor unit capacity[kW(Btu/h)]
Outdoor unit [mm(inch)] [mm(inch)]
① Main pipe 11.0(37,500) Ø9.52(3/8) Ø15.88(5/8)
↓
1st branching section 14.5(49,500) Ø9.52(3/8) Ø15.88(5/8)
16.0(54,600) Ø9.52(3/8) Ø19.05(3/4)

Pipe size of between branching sections
Liquid pipe Gas pipe
Branching section Indoor unit capacity[kW(Btu/h)]
[mm(inch)] [mm(inch)]
② ↓ Branching pipe
≤ 5.6(19,100) Ø6.35(1/4) Ø12.7(1/2)
Branching section < 16.0(54,600) Ø9.52(3/8) Ø15.88(5/8)
< 22.4(76,400) Ø9.52(3/8) Ø19.05(3/4)

Connecting pipe size of indoor unit
Branching section Liquid pipe Gas pipe
Indoor unit Indoor unit capacity[kW(Btu/h)]
③ ↓
[mm(inch)] [mm(inch)]
connecting pipe
≤ 5.6(19,100) Ø6.35(1/4) Ø12.7(1/2)
Indoor unit
< 16.0(54,600) Ø9.52(3/8) Ø15.88(5/8)


Refrigerant Piping

Allowable Length/Height Difference of Refrigerant Piping
■ Y Branch Method

Example : 5 Indoor Units connected
Ⓐ : Outdoor Unit
Ⓑ : 1st branch (Y branch)
Ⓒ : Indoor Units

L150m

H 50m
l 40m

➲ Total pipe length = A+B+C+D+a+b+c+d+e ≤ 300m

Longest pipe length Equivalent pipe length(*)
L
A+B+C+D+e ≤ 150m A+B+C+D+e ≤ 175m
Longest pipe length after 1st branch
l
B+C+D+e ≤ 40m
Difference in height(Outdoor Unit ↔ Indoor Unit)
H
H ≤ 50m ( 40m : Outdoor Unit is lower than Indoor Units)
Difference in height (Indoor Unit ↔ Indoor Unit)
h h ≤ 15m

* : Assume equivalent pipe length of Y branch to be 0.5m, that of header to be 1m, calculation purpose

CAUTION
Indoor Unit should be installed at lower position than the header

26 Outdoor Unit

Refrigerant Piping
■ Header Method

ENGLISH
Ⓐ : Outdoor Unit
Ⓑ : 1st branch
Ⓒ : Indoor Units
Ⓓ : Sealed piping
L 150m

H 50m
40m

➲ Total pipe length = A+a+b+c+d+e+f ≤ 300m
L
A+f ≤ 150m A+f ≤ 175m
l
f ≤ 40m
H
H ≤ 50m (40m : Outdoor Unit is lower)
h h ≤ 15m


CAUTION

WARNING
Pipe length after header branching (a~f)
It is recommended that difference in length of the pipes connected to the Indoor Units is
minimized. Performance difference between Indoor Units may occur.


Refrigerant Piping
■ Combination of Y branch/header method

Ⓐ : Outdoor Unit
Ⓑ : 1st branch (Y branch)
Ⓒ : Y branch
Ⓓ : Indoor Unit
Ⓔ : Header
Ⓕ : Sealed piping

H 50m
L 150m
40m

Branch pipe can not be used after header
➲ Refrigerant pipe diameter from branch to branch (B,C)
Downward Indoor Unit total capacity Liquid pipe Gas pipe
[kW(Btu/h)] [mm(inch)] [mm(inch)]
≤ 5.6(19,100) Ø6.35(1/4) Ø12.7(1/2)
< 16.0(54,600) Ø9.52(3/8) Ø15.88(5/8)
< 22.4(76,400) Ø9.52(3/8) Ø19.05(3/4)

➲ Total pipe length = A+B+C+a+b+c+d+e ≤ 300m

L
A+B+b ≤ 150m A+B+b ≤ 175m
l
B+b ≤ 40m
H
H ≤ 50m (40m : Outdoor Unit is lower than Indoor Units)
h h ≤ 15m


CAUTION

WARNING
It is recommended that difference of piping length for pipes connected to the Indoor Unit is
minimized. Performance difference between Indoor Units may occur.

28 Outdoor Unit

Refrigerant Piping

The Amount of Refrigerant

ENGLISH
The calculation of the additional charge should take into account the length of pipe.

Product charge(kg)

Additional charge(kg) = Length(m) of
liquid pipe of Ø9.52mm
x 0.061(kg/m)

+ Length(m) of
liquid pipe of Ø6.35mm x 0.022(kg/m)

+ Correction factor of
outdoor unit

+ Correction factor of
Indoor unit

Total charge(kg) = Product charge(kg) + Additional charge(kg)

Example : 5 HP

L1 L2 L3
a 1WAY b 2WAY c 4WAY d 4WAY
2.2kW 5.6kW 2.2kW 7.1kW

L1 Ø9.52:10m L2 Ø9.52:10m L3 Ø9.52:5m

a Ø9.52:3m b Ø6.35:3m c Ø6.35:4m d Ø6.35:5m

Additional charge amount R (kg)
= (Lx x 0.022kg/m) + (Ly x 0.061kg/m) + Correction factor of outdoor unit + Correction factor of indoor unit
= (12 x 0.022kg/m) + (28 x 0.061kg/m) + 0 + 0.2 + 0.16 + 0.25 + 0.48
= 3.062

Lx : Real total length of liquid pipe Ø6.35(m)
Ly : Real total length of liquid pipe Ø9.52(m)

■ Correction factor of Indoor unit
(unit : kg)
Capacity : kW(kBtu) 1.6 2.2 2.8 3.6 4.5 5.6 7.1 8.2 10.6 12.3 14.1
Indoor unit (5.5) (7.5) (9.6) (12.3) (15.4) (19.1) (24.2) (28.0) (36.2) (42.0) (48.1)
Ceiling Concealed Duct(Low Static) - 0.17 0.17 0.17 0.17 0.37 0.37 - - - -
Ceiling Concealed Duct(High Static) - 0.17 0.17 0.17 0.17 0.26 0.26 0.44 0.44 0.44 0.62
Wall Mounted - 0.24 0.24 0.24 0.24 0.28 0.28 - - - -
1WAY Ceiling Cassette - 0.20 0.20 0.20 - 0.29 0.29 - - - -
2WAY Ceiling Cassette - - - - - 0.16 0.16 - - - -
4WAY Ceiling Cassette 0.25 0.25 0.25 0.25 0.32 0.32 0.48 0.48 0.64 0.64 0.64
Artcool - 0.10 0.10 0.10 0.10 0.29 0.29 - - - -
Floor Standing - 0.17 0.17 0.17 0.17 0.37 0.37 - - - -

Note:
Fill in the f-gas Label attached on outdoor about the quantity of the fluorinated greenhouse gases
① Manufacturing site (See Model Name label)
② Installation site (If possible being placed adjacent to the service points for the addition or removal of refrigerant)
③ The total Charge (①+②)


Refrigerant Piping

CAUTION
If a negative result is obtained from the calculation, no refrigerant needs to be added.

WARNING
Regulation for refrigerant leakage
: the amount of refrigerant leakage should satisfy the following equation for human safety.
Total amount of refrigerant in the system
≤ 0.44 ( kg / m3 )
Volume of the room at which Indoor Unit of the least capacity is installed

If the above equation can not be satisfied, then follow the following steps.
- Selection of air conditioning system: select one of the next
1. Installation of effective opening part
2. Reconfirmation of Outdoor Unit capacity and piping length
3. Reduction of the amount of refrigerant
4. Installation of 2 or more security device (alarm for gas leakage)
- Change Indoor Unit type
: installation position should be over 2m from the floor (Wall mounted type → Cassette type)
- Adoption of ventilation system
: choose ordinary ventilation system or building ventilation system
- Limitation in piping work
: Prepare for earthquake and thermal stress

WARNING
Refer to model information since the CF Value of correction factor differs depending on model.

30 Outdoor Unit

Refrigerant Piping

Distribution Method

ENGLISH
1. Line Distribution

1st 2nd 3rd main pipe distribution

1st 2nd 3rd

1st 2nd 3rd
1st
Main pipe
Distribution

3nd
Main pipe
Distribution

2. Vertical Distribution
Ensure that the branch pipes are attached vertically.

3. The others

Header


Refrigerant Piping

Branch Pipe Fitting
■ Y branch

B A To Outdoor Unit
A B To Branch Piping or Indoor Unit

• Ensure that the branch pipes are attached horizontally or vertically (see the diagram below.)

Horizontal Facing Facing
plane downwards upwards

Within +/- 10°

A
Viewed from point A
in direction of arrow

Within ± 3° Within ± 3°

■ Header
A

• The indoor unit having larger capacity must be
installed closer to Ⓐ than smaller one.
• If the diameter of the refrigerant piping selected
by the procedures described is different from
B the size of the joint, the connecting section
should be cut with a pipe cutter.

C Ⓐ To indoor unit
Ⓑ To outdoor unit
ⓒ Pipe cutter • When the number of pipes to be connected is
smaller than the number of header branches,
install a cap to the unconnected branches.

32 Outdoor Unit

Refrigerant Piping
• When the number of indoor units to be connected to the branch pipes is less than the number of branch
pipes available for connection then cap pipes should be fitted to the surplus branches.

ENGLISH
B

Pinched pipe

• Fit branch pipe lie in a horizontal plane.

Horizontal plane

View from point B in the direction of the arrow

• Header should be insulated with the insulator in each kit.

Insulate the header using
the insulation
material attached to the
branch pipe kit
as shown in the figure.

• Joints between branch and pipe should be sealed with the tape included in each kit.
Tape

Insulator

Insulator of field pipe

• Any cap pipe should be insulated using the insulator provided with each kit and then taped as described
above.
Insulator for cap pipe

Cap pipe
Tape


Installation manual mini

Recommended

Recommended

More Related Content

What's hot

What's hot (14)

Similar to Installation manual mini

Similar to Installation manual mini (20)

More from Agassis Rodrigues

More from Agassis Rodrigues (20)

Installation manual mini