LG UU70W User manual

P/NO : MFL68645302
INSTALLATION MANUAL
AIR
CONDITIONER
www.lg.com
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.
Standard inverter
Original instruction
[Representative] LG Electronics Inc. EU Representative :
LG Electronics European Shared Service Center B.V.
Krijgsman 1, 1186 DM Amstelveen, The Netherlands
[Manufacturer] LG Electronics Inc. Changwon 2nd factory 84, Wanam-ro,
Seongsan-gu, Changwon-si, Gyeongsangnam-do, KOREA
ENGLISH ITALIANO ESPAÑOL FRANÇAIS DEUTSCH
ΕΛΛΗΝΙΚΆ
ČEŠTINA
NEDERLANDS
POLSKI
LIMBA ROMÂNĂ

• Do not cool excessively indoors. This may be harmful for your health and may consume more
electricity.
• Block sunlight with blinds or curtains while you are operating the air conditioner.
• Keep doors or windows closed tightly while you are operating the air conditioner.
• Adjust the direction of the air flow vertically or horizontally to circulate indoor air.
• Speed up the fan to cool or warm indoor air quickly, in a short period of time.
• Open windows regularly for ventilation as the indoor air quality may deteriorate if the air condi-
tioner is used for many hours.
• Clean the air filter once every 2 weeks. Dust and impurities collected in the air filter may block the
air flow or weaken the cooling / dehumidifying functions.
For your records
Staple your receipt to this page in case you need it to prove the date of purchase or for warranty
purposes. Write the model number and the serial number here:
Model number :
Serial number :
You can find them on a label on the side of each unit.
Dealer’s name :
Date of purchase :
Here are some tips that will help you minimize the power consumption when you use the air
conditioner. You can use your air conditioner more efficiently by referring to the instructions
below:
TIPS FOR SAVING ENERGY
2
ENGLISH
TIPS FOR SAVING ENERGY
1.MFL68645302(영) 16. 12. 7. 영영 6:09 Page 2

3
IMPORTANT SAFETY INSTRUCTIONS
IMPORTANT SAFETY INSTRUCTIONS
READ ALL INSTRUCTIONS BEFORE USING THE APPLIANCE.
Always comply with the following precautions to avoid danger-
ous situations and ensure peak performance of your product
WARNING
It can result in serious injury or death when the directions are ig-
nored
CAUTION
It can result in minor injury or product damage when the direc-
tions are ignored
WARNING
• Installation or repairs made by unqualified persons can result
in hazards to you and others.
•
The information contained in the manual is intended for use by
a qualified service technician familiar with safety procedures
and equipped with the proper tools and test instruments.
• Failure to carefully read and follow all instructions in this man-
ual can result in equipment malfunction, property damage,
personal injury and/or death.
Installation
• Do not use a defective or underrated circuit breaker. Use this
appliance on a dedicated circuit.
- There is risk of fire or electric shock.
• For electrical work, contact the dealer, seller, a qualified elec-
trician, or an Authorized Service Center.
- Do not disassemble or repair the product. There is risk of fire
or electric shock.
• Always ground the product.
- There is risk of fire or electric shock.
!
!
!
ENGLISH
1.MFL68645302(영) 16. 12. 7. 영영 6:09 Page 3

• Install the panel and the cover of control box securely.
- There is risk of fire or electric shock.
• Always install a dedicated circuit and breaker.
- Improper wiring or installation may cause fire or electric
shock.
• Use the correctly rated breaker or fuse.
- There is risk of fire or electric shock.
• Do not modify or extend the power cable.
- There is risk of fire or electric shock.
• Do not let the air conditioner run for a long time when the hu-
midity is very high and a door or a window is left open.
- Moisture may condense and wet or damage furniture.
• Be cautious when unpacking and installing the product.
- Sharp edges could cause injury. Be especially careful of the
case edges and the fins on the condenser and evaporator.
• For installation, always contact the dealer or an Authorized
Service Center.
- There is risk of fire, electric shock, explosion, or injury.
• Do not install the product on a defective installation stand.
- It may cause injury, accident, or damage to the product.
• 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, and personal in-
jury.
• Use a vacuum pump or Inert (nitrogen) gas when doing leak-
age test or air purge. Do not compress air or Oxygen and do
not use Flammable gases. Otherwise, it may cause fire or ex-
plosion.
- There is the risk of death, injury, fire or explosion.
• Do not turn on the breaker or power under condition that front
panel, cabinet, top cover, control box cover are removed or
opened.
- Otherwise, it may cause fire, electric shock, explosion or
death.
IMPORTANT SAFETY INSTRUCTIONS
4
ENGLISH
1.MFL68645302(영) 16. 12. 7. 영영 6:09 Page 4

5
IMPORTANT SAFETY INSTRUCTIONS
ENGLISH
Operation
• Do not store or use flammable gas or combustibles near the
product.
- There is risk of fire or failure of product.
CAUTION
Installation
• Always check for gas (refrigerant) leakage after installation or
repair of product.
- Low refrigerant levels may cause failure of product.
• 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.
• Keep level even when installing the product.
- To avoid vibration or water leakage.
• 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.
• Use two or more people to lift and transport the product.
- Avoid personal injury.
• Do not install the product where it will be 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.
• If it is installed at a place with a lot of snowfall, install with the
frame and base height higher than the most extreme snowfall
amount standard, and mount the snowfall hood (separately
sold).
!
1.MFL68645302(영) 16. 12. 7. 영영 6:09 Page 5

6TABLE OF CONTENTS
ENGLISH
2TIPS FOR SAVING
ENERGY
3IMPORTANT SAFETY
INSTRUCTIONS
7INSTALLATION OF
OUTDOOR UNIT
11 LIFTING METHOD
12 INSTALLATION
12 The location of the Anchor bolts
13 Foundation for Installation
14 CONNECTING PIPES
14 Preparation of Piping
15 Plumbing materials and storage methods
17 REFRIGERANT PIPING
INSTALLATION
17 Precautions on Pipe connection / Valve
operation
18 PIPE CONNECTIONS
BETWEEN INDOOR AND
OUTDOOR UNIT
18 Preparation Work
19 Pipe Drawing Out
22 Thermal insulation of refrigerant pipe
23 WIRING CONNECTION
23 Electrical Wiring
23 Connecting Cables between Indoor Unit
and Outdoor Unit
26 Connecting the cable to Outdoor Unit
28 Forming the piping
29 LEAKAGE TEST AND
EVACUATION
29 Preparation
29 Leakage test
30 Evacuation
31 TEST RUNNING
33 SELF-DIAGNOSIS
FUNCTION
33 Error Indicator (Outdoor)
34 Dip S/W Setting (UU36/42/48WH)
36 INSTALLATION GUIDE
AT THE SEASIDE
TABLE OF CONTENTS
1.MFL68645302(영) 16. 12. 7. 영영 6:09 Page 6

INSTALLATION OF OUTDOOR UNIT 7
ENGLISH
- If an awning is built over the unit to prevent
direct sunlight or rain exposure, make sure
that heat radiation from the condenser is not
restricted.
- Ensure that the spaces indicated by arrows
around front, back and side of the unit.
- Do not place animals and plants in the path
of the warm air.
- Take the air conditioner weight into account
and select a place where noise and vibration
are minimum.
- Select a place so that the warm air and noise
from the air conditioner do not disturb neigh-
bors.
You need to select adequate installation location considering the following conditions, and make
sure to acquire the consent of the user.
- Place that can sufficiently endure the weight and vibration of the outdoor unit and where even
installation is possible.
- Place that has no direct influence of snow or rain
- Place with no danger of snowfall or icicle drop
- Place without weak floor or base such as decrepit part of the building or with a lot of snow ac-
cumulation
- Install at a place with fluent water draining to prevent damage from localized heavy rain and
avoid frequent flooded area.
• Single Operation
If installed tube is shorter than 25 m, addi-
tional charging is not necessary.
Additional Refrigerant
= (A-25) x Additional refrigerant (g)
INSTALLATION OF OUTDOOR UNIT
More than
300mm
Fence or
obstacles
More than 700mm
More than 600m
m
More than
More than
300mm
300mm
More than
300mm
Sunroof
Unit : mm
Outdoor unit
Indoor unit
A
B
Outdoor unit
Indoor unit
A
B
Model
Pipe Size mm(inch) Length A(m) Elevation B(m) Additional
refrigerant
(g/m)
Gas Liquid Standard Max. Standard Max.
UU70W Ø25.4(1) 9.52(3/8) 25 75 5 30 70
Installation Places
Piping length and the elevation
1.MFL68645302(영) 16. 12. 7. 영영 6:09 Page 7

8INSTALLATION OF OUTDOOR UNIT
ENGLISH
• Synchro Operation
Install the branch pipe so that pipe length and difference between high and low will not exceed
below Spec.
• Refrigerant Additional Charging Method
For additional charging method, see below table.
- When installing the branch pipe, direction and angle of installation is not limited.
- Take care so that burrs and foreign material may not enter into the cutting surface when con-
necting.
- Connect remaining those by cutting or direct insertion to the diameter of pipe.
[Unit : m]
Branch
L1
H1
A
A
L2
L3
L4
L5
H2
Remote
Controller
Pipe Length & Height Spec(MAX.)
Total(L1+L2+L3+L4+L5)
Main Pipe(L1)
Branch Pipe (L2+L3+L4+L5)
Each
Indoor-Outdoor (H1)
Indoor-Indoor (H2)
(L1+L2),(L1+L3),(L1+L4),(L1+L5)
A
80
40
40
10
30
1
70
10
Indoor Unit Refrigerant Additional charging (g)
Duo Refrigerant = (L1-b) x B + (L2 + L3) x C
Trio Refrigerant = (L1-b) x B + (L2 + L3 + L4) x C
Quartet Refrigerant = (L1-b) x B + (L2 + L3 + L4 + L5) x C
Model b (mm) B(g/m)
UU70W 25 70
Pipe Diameter.
(mm)
C (g/m)
Ø 6.35 35
Ø 9.52 40
NOTE
!
b : Rated performance for refrigerant line length.
C : Additional charging Refrigerant of Branch Liquid Pipe.
B : Additional charging Refrigerant of Main Liquid Pipe.
CAUTION
• Capacity is based on standard length and maximum allowance length is on the basis of re-
liability.
• Improper refrigerant charge may result in abnormal cycle.
!
1.MFL68645302(영) 16. 12. 7. 영영 6:09 Page 8

INSTALLATION OF OUTDOOR UNIT 9
ENGLISH
Possible combination of indoor units
Synchro
Duo Trio Quartet
IDU : INDOOR UNIT
ODU : OUTDOOR UNIT
BD : BRANACH DISTRIB-
UTOR UNIT
REMO : WIRED REMOTE
CONTROLLER
ODU
BD
IDU IDU
REMO
ODU
BD
IDU IDU IDU
REMO
BD
IDU IDU IDU IDU
ODU
REMO
MODEL Cassette Duct Convertible Cassette Duct Convertible Cassette Duct Convertible
UU85W UT36 NN2*2 UM36 N24*2 UV36 NK2*2 CT24 NP2*3 CM24 N14*3
CB24L N32*3 CV24 NJ2*3 CT18 NQ2*4 CM18 N14*4 CB18L N22*4 CV18 NJ2*4
Applied
Acces-
siries
BD unit PMUB11A PMUB111A PMUB1111A
Simple central
controller** PQCSZ250S0
NOTE
!
** When using synchro operation,
• Do not use wireless remote controller.
• Use only one wired remote controller in the indoor units.
• Use central controller and function controller "PQCSZ250S0" only.
Synchro Combination table
1.MFL68645302(영) 16. 12. 7. 영영 6:09 Page 9

10 INSTALLATION OF OUTDOOR UNIT
ENGLISH
1DIP_SW Setting
Set the DIP_SW as below Table (Ⓐ)
2Auto Addressing Method
Addressing work assigns address to each indoor unit. When firstly installing product or replac-
ing the indoor unit PCB. Auto Addressing work should be done for simultaneous operation.
* Work procedure
1) Set DIP_SW correctly.
2) Turn on main power.
3) Press the SW01M for about 3 seconds within 3 minutes After main power on.(Ⓑ)
4) After step 3), the LED01E(red LED) and LED02E(green LED) rapidly flickers. When Addressing
work is done, green LED is off, else LED (LED01E) stops flickering and lights continuously. Ad-
dress of indoor unit is indicated on the wired remote control display window. (CH01, CH02,
CH03, CH04)
5) Press ]button to turn on the indoor.
6) If you fail to perform the Addressing work, repeat step 2)~5).
Outdoor Unit PCB Setting Procedure For Simultaneous Operation System
Main PCB
SW01M
DIP SW01D
A
B
LED01E
LED02E
12345678910
DIP SW01D Indoor Unit No.
12345678910
1(Single)
: Default
12345678910
2(Duo)
12345678910
3(Trio)
12345678910
4(Quartet)
1.MFL68645302(영) 16. 12. 7. 영영 6:09 Page 10

LIFTING METHOD 11
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.
• Use 2 belts of at least 8 m long.
• Place extra cloth or boards in the locations where the casing comes in contact with the
sling to prevent damage.
• Hoist the unit making sure it is being lifted at its center of gravity.
- 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
Handle
Always hold the unit by the corners, as holding
it by the side intake holes on the casing may
cause them to deform.
Sub line
40° or less
A
WARNING
!
LIFTING METHOD
ENGLISH
1.MFL68645302(영) 16. 12. 7. 영영 6:09 Page 11

12 INSTALLATION
ENGLISH
The location of the Anchor bolts
- Install at places where it can endure the weight and vibration/noise of the outdoor unit.
- The outdoor unit supports at the bottom shall have width of at least 100mm under the Unit’s
legs before being fixed.
- The outdoor unit supports should have minimum height of 200mm.
- Anchor bolts must be inserted at least 75mm.
At least 100mm
At least 100mm
At least 100mm
At least 100mm
At least 100mm
At least 100mm
Center of the Unit
For outdoor units should not
be supported only by the
corner supports.
Center of the Unit
920
618
330
360
INSTALLATION
[Unit : mm]
1.MFL68645302(영) 16. 12. 7. 영영 6:09 Page 12

INSTALLATION 13
Foundation for Installation
- Fix the unit tightly with bolts as shown below so that unit will not fall down due to earthquake
or gust.
- Use the H-beam support as a base support
- Noise and vibration may occur from the floor or wall since vibration is transferred through the in-
stallation part depending on installation status. Thus, use anti-vibration materials (cushion pad)
fully (The base pad shall be more than 200mm).
At least 200mm
Unit : mm
200
75
75
200
100
ⒶThe corner part must be fixed firmly. Otherwise,
the support for the installation may be bent.
ⒷGet and use M10 Anchor bolt.
Ⓒ Put Cushion Pad between the outdoor unit and ground
support for the vibration protection in wide area.
ⒹSpace for pipes and wiring (Pipes and wirings for
bottom side)
ⒺH-beam support
ⒻConcrete support
CAUTION
• Be sure to remove the Pallet(Wood Support) of the
bottom side of the outdoor unit Base Pan before fix-
ing the bolt. It may cause the unstable state of the
outdoor settlement, and may cause freezing of the
heat exchanger resulting in abnormal operations.
• Be sure to remove the Pallet(Wood Support) of the
bottom side of the outdoor unit before welding.
Not removing Pallet(Wood Support) causes hazard
of fire during welding.
WARNING
• Install where it can sufficiently support the weight of the outdoor unit.
If the support strength is not enough, the outdoor unit may drop and hurt people.
• Install where the outdoor unit may not fall in strong wind or earthquake.
If there is a fault in the supporting conditions, the outdoor unit may fall and hurt people.
• Please take extra cautions on the supporting strength of the ground, water outlet treat-
ment(treatment of the water flowing out of the outdoor unit in operation), and the pas-
sages of the pipe and wiring, when making the ground support.
• Do not use tube or pipe for water outlet in the Base pan. Use drainage instead for water
outlet. The tube or pipe may freeze and the water may not be drained.
•
If it is installed at a place with a lot of snowfall, install with the frame and base height higher than
the most extreme snowfall amount standard, and mount the snowfall hood (separately sold).
Pallet(Wood Support)
- Remove before Installation
!
!
ENGLISH
1.MFL68645302(영) 16. 12. 7. 영영 6:09 Page 13

14 CONNECTING PIPES
ENGLISH
Main cause of gas leakage is defect in flaring work. Carry out correct flaring work in the following
procedure.
Cut the pipes and the cable.
- Use the accessory piping kit or the pipes pur-
chased 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.
Burrs removal
- Completely remove all burrs from the cut
cross section of pipe/tube.
- Put the end of the copper tube/pipe to down-
ward direction as you remove burrs in order
to avoid to let burrs drop in the tubing.
Putting nut on
- Remove flare nuts attached to indoor and
outdoor units, than put them on pipe/tube
having completed burr removal.
(Not possible to put them on after flaring
work)
Flaring work
- Carry out flaring work using dedicated flaring
tool for R-410A as shown below.
Firmly hold copper tube in a bar(or die) as in-
dicated dimension in the table above.
Check
- Compare the flared work with figure below.
- If flare is noted to be defective, cut off the
flared section and do flaring work again.
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 =
Flare nut
Copper tube
Pipe
Reamer
Point down
Copper
tube 90° Slanted Uneven Rough
Preparation of Piping
CONNECTING PIPES
Outside diameter "A"
mm inch mm
Ø6.35 1/4 1.1~1.3
Ø9.52 3/8 1.5~1.7
Ø12.7 1/2 1.6~1.8
Ø15.88 5/8 1.6~1.8
1.MFL68645302(영) 16. 12. 7. 영영 6:09 Page 14

CONNECTING PIPES 15
ENGLISH
Plumbing materials and storage methods
Pipe must be able to obtain the specified thickness and should be used with low impurities.
Also when handling storage, pipe must be careful to prevent a fracture, deformity and wound.
Should not be mixed with contaminations such as dust, moisture.
Refrigerant piping on three principles
Drying Cleanliness Airtight
Should be no moisture inside No dust inside. There is no refrigerant leak-
age
Items
Moisture
Dust
Leakage
Cause
failure
- Significant hydrolysis of re-
frigerant oil
- Degradation of refrigerant
oil
- Poor insulation of the com-
pressor
- Do not cold and warm
- Clogging of EEV, Capillary
- Degradation of refrigerant
oil
- Poor insulation of the com-
pressor
- Do not cold and warm
- Clogging of EEV, Capillary
- Gas shortages
- Degradation of refrigerant
oil
- Poor insulation of the com-
pressor
- Do not cold and warm
Counter-
measure
- No moisture in the pipe
- Until the connection is
completed, the plumbing
pipe entrance should be
strictly controlled.
- Stop plumbing at rainy day.
- Pipe entrance should be
taken side or bottom.
- When removal burr after
cutting pipe, pipe entrance
should be taken down.
- Pipe entrance should be
fitted cap when pass
through the walls.
- No dust in the pipe.
- Until the connection is
completed, the plumbing
pipe entrance should be
strictly controlled.
- Pipe entrance should be
taken side or bottom.
- When removal burr after
cutting pipe, pipe entrance
should be taken down.
- Pipe entrance should be
fitted cap when pass
through the walls.
- Airtightness test should
be.
- Brazing operations to com-
ply with standards.
- Flare to comply with stan-
dards.
- Flange connections to
comply with standards.
1.MFL68645302(영) 16. 12. 7. 영영 6:09 Page 15

16 CONNECTING PIPES
ENGLISH
Nitrogen substitution method
Welding, as when heating without nitrogen substitution a large amount of the oxide film is
formed on the internal piping.
The oxide film is a caused by clogging EEV, Capillary, oil hole of accumulator and suction hole of
oil pump in compressor.
It prevents normal operation of the compressor.
In order to avoid this problem, Welding should be done after replacing air by nitrogen gas.
When welding plumbing pipe, the work is required.
1Always use the nitrogen.(not use oxygen, carbon dioxide, and a Chevron gas):
Please use the following nitrogen pressure 0.02MPa
Oxygen – Promotes oxidative degradation of refrigerant oil.
Because it is flammable, it is strictly prohibited to use
Carbon dioxide – Degrade the drying characteristics of gas
Chevron Gas – Toxic gas occurs when exposed to direct flame.
2Always use a pressure reducing valve.
3Please do not use commercially available antioxidant.
The residual material seems to be the oxide scale is observed.
In fact, due to the organic acids generated by oxidation of the alcohol contained in the
anti-oxidants, ants nest corrosion occurs. (causes of organic acid →alcohol + copper +
water + temperature)
CAUTION
!
Regulator
Nitrogen gas
Pressure 0.02MPa less
Auxiliary valve
Taping
(Should not
contain air)
Welding Point
Note) should not block the outlet side.
When the internal pressure in pipe is abo
ve the atmospheric pressure, pinhole is o
ccurred and it is a leakage cause.
Oxide scale
Nitrogen
1.MFL68645302(영) 16. 12. 7. 영영 6:09 Page 16

REFRIGERANT PIPING INSTALLATION 17
ENGLISH
Precautions on Pipe connection / Valve operation
Pipe connection is done by connecting from the end of the pipe to the branching pipes, and the
refrigerant pipe coming out of the outdoor unit is divided at the end to connect to each indoor
unit. Flare connection for the indoor unit, and welding connection for the outdoor pipe and the
branching parts.
- Use hexagonal wrench to open/close the valve.
Liquid pipe
Gas pipe
CAUTION
Please block the pipe knock outs of the front and side panels after installing the pipes.
(Animals or foreign objects may be brought in to damage wires.)
!
WARNING
• Always careful not to leak the refrigerant during welding.
• The refrigerant generates poisonous gas harmful to human body if combusted.
• Do not perform welding in a closed space.
• Be sure to close the cap of the service port to prevent gas leakage after the work.
!
REFRIGERANT PIPING INSTALLATION
※Pictures may differ depending on the model.
1.MFL68645302(영) 16. 12. 7. 영영 6:09 Page 17

18 PIPE CONNECTIONS BETWEEN INDOOR AND OUTDOOR UNIT
ENGLISH
- Pipe connections can be done on the front side or on the side according to the installation
- Be sure to let 0.2kgf/cm2Nitrogen flow in the pipe when welding.
- If Nitrogen was not flown during welding, many oxidized membranes may form inside the pipe
and disturb the normal operations of valves and condensers.
Front Pipe
Draw Out Right Side Pipe
Draw Out
Bottom Side Pipe
Draw Out
Rear Side Pipe
Draw Out
Refrigerant Pipe
Regulator
Nitrogen
Taping Valve
Nitrogen
Nitrogen
Direction
Direction
Nitrogen
Direction
Preparation Work
- Use Knock Outs of Base Pan of the outdoor unit for Left/Right or Bottom pipe drawing outs.
Removal Area for Liquid/Gas pipe
bottom side connections.
<Gas pipe>
<Liquid pipe>
Wet towel
CAUTION
• Do not give damage to the pipe/base during the Knock Out work.
• Proceed to pipe work after removing burr after Knock Out work.
•
Perform sleeve work to prevent damage to the wire when connecting wires using knock Outs.
• 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.
!
PIPE CONNECTIONS BETWEEN INDOOR AND
OUTDOOR UNIT
※Pictures may differ depending on the model.
1.MFL68645302(영) 16. 12. 7. 영영 6:09 Page 18

PIPE CONNECTIONS BETWEEN INDOOR AND OUTDOOR UNIT 19
Remove leakage prevention cap
• Remove the leakage prevention cap attached to the outdoor unit service valve before pipe
work.
• Proceed the leakage prevention cap removal as follows:
- Verify whether the liquid/gas pipes are locked.
- Extract remaining refrigerant or air inside using the service port.
- Remove the leakage prevention cap
Service Port
Leakage Prevention Cap
Liquid pipe
Gas pipe
Pipe Drawing Out
Method of drawing out pipes on the front side and right side
- Proceed with the pipe work as shown in the below figure for front side and right side pipe draw-
ing out.
Pipe Knock Out for
Liquid/Gas pipes
ENGLISH
※Pictures may differ depending on the model.
1.MFL68645302(영) 16. 12. 7. 영영 6:09 Page 19

20 PIPE CONNECTIONS BETWEEN INDOOR AND OUTDOOR UNIT
ENGLISH
Method of drawing out pipes on the bottom side
- Drawing out common pipe through base panel
Method of drawing out pipes on the rear side
- Proceed with the pipe work as shown in the below figure for rear side pie drawing out.
Liquid pipe Gas pipe
Remove only liquid/gas pipe Knock out
Pipe Knock Out for Liquid/Gas pipes
※Pictures may differ depending on the model.
1.MFL68645302(영) 16. 12. 7. 영영 6:10 Page 20