LG URNU48GVLA2 User manual

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.
P/NO : MFL67107606 www.lg.com
TYPE: Ceiling Suspended
ENGLISH ITALIANO ESPAÑOL FRANCAIS DEUTSCH
PORTUGUESE РУССКИЙ ЯЗЫК

2Indoor Unit
Ceiling Suspended Convertable Type Indoor Unit Installation Manual
TABLE OF CONTENTS
o Installation guide map
oFour type "A" screws & plastic
anchors
oConnecting cable
oPipes: Gas side
Liquid side
(Refer to Product
Data)
oInsulation materials
oAdditional drain pipe
oLevel gauge
oScrew driver
oElectric drill
oHole core drill
oHorizontal meter
oFlaring tool set
oSpecified torque wrenches
(different depending on model No.)
oSpanner .......Half union
oHexagonal wrench
oGas-leak detector
oVacuum pump
oGauge manifold
oOwner's manual
oThermometer
Introduction.............................3
Safety Precautions.................4
Installation
Selection of the best location 6
Preparing Work for Installation
................................................6
Indoor unit Installation............8
Preparation of Piping .............9
Checking the Drainage........11
Wiring Connection ...............11
Side Cover Assembly..........13
Installation of Wired
Remote Controller ...............14
Optional Operation of
Wired Remote Controller ....16
Dip Switch Setting ...............17
Group Control Setting..........18
Installation Requirements Required Parts Required Tools

Installation Manual 3
Installation Parts
ENGLISH
Introduction
This symbol alerts you to the risk of electric shock.
This symbol alerts you to hazards that may cause harm to the
air conditioner.
This symbol indicates special notes.
NOTICE
Symbols used in this Manual
Features
Signal Receptor
Air Filter
Air Discharge
Right Side Cover
Inlet Grill Left Side Cover

4Indoor Unit
Safety Precautions
Safety Precautions
To prevent injury to the user or other people and property damage, the following instructions must be followed.
nBe sure to read before installing the air conditioner.
nBe sure to observe the cautions specified here as they include important items related to safety.
nIncorrect operation due to ignoring instruction will cause harm or damage. The seriousness is classified by the
following indications.
nMeanings 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.
nInstallation
Do not use a defective or under-
rated 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 electri-
cian, or an Authorized Service
Center.
• Do not disassemble or repair the
product. There is risk of fire or elec-
tric shock.
Always ground the product.
• There is risk of fire or electric shock.
Install the panel and the cover
of control box securely.
• There is risk of fire or electric shock.
Always install a dedicated cir-
cuit 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
humidity 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 condi-
tioner could fall with it, causing prop-
erty damage, product failure, and
personal injury.

Installation Manual 5
Safety Precautions
ENGLISH
nOperation
Do not store or use flammable gas or combustibles near the product.
• There is risk of fire or failure of product.
Always check for gas (refriger-
ant) leakage after installation or
repair of product.
• Low refrigerant levels may cause
failure of product.
Install the drain hose to ensure
that water is drained away prop-
erly.
• A bad connection may cause water
leakage.
Keep level even when installing
the product.
• To avoid vibration or water leakage.
nInstallation
Do not install the product where
the noise or hot air from the out-
door 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 con-
denser and evaporator fins, could
cause product malfunction or inefficient
operation.
If you eat the liquid from the
batteries, brush your teeth and
see doctor. Do not use the
remote if the batteries have
leaked.
• The chemicals in batteries could
cause burns or other health
hazards.

6Indoor Unit
Installation
Read completely, then follow step by step.
Installation
Indoor unit
1. Do not have any heat or steam near the unit.
2. Select a place where there are no obstacles in
front of the unit.
3. Make sure that condensation drainage can be
conveniently routed away.
4. Do not install near a doorway.
5. Ensure that the interval between a wall and the
left (or right) of the unit is more than 70cm.
6. Use a stud finder to locate studs to prevent
unnecessary damage to the wall.
More than
70cm
More than
30cm
More than
70cm
Select the best Location
Preparing Work for Installation
Open side cover
1. Remove two screws from side-cover as shown
in fig.
2. Unlock side-cover from side panel by slightly
pulling the edge of side cover.
3. Tap the side-cover with your palm on the back-
side.(Inlet grill side.)
4. Hold the side-cover with other hand while tap-
ping to prevent it to fall down.
5. The Drain hole is on the left side of the unit and
side cover opening is common for drain pipe,
connecting pipe and wiring diagram.
6. Remove the rubber stopple in the desired drain
direction.
7. Knock out the pipe hole from the left side-cover
with the help or nipper/plier.
8. Knock hole on right side-cover only if right side
is selected for water drain.
2
1
Edge part
: In case that the unit is installed near the sea, the installation parts may be
corroded by salt. The installation parts (and the unit) should be taken appropriate anti-corrosion
measures.

Installation Manual 7
Installation
ENGLISH
MOUNTING THE ANCHOR NUT AND
BOLT
• Prepare 4 suspension bolts. (Each bolts length
should be same.)
• Measure and mark the position for the
Suspension bolts and the piping hole.
• Drill the hole for anchor nut on the ceiling.
• Insert the nuts and washer onto the suspension
bolts for locking the suspension bolts on the ceil-
ing.
• Mount the suspension bolts to the anchor-nuts
firmly.
• Secure the hangers onto the Suspension bolts
(adjust level roughly.) using nuts, washers and
spring washers.
• Adjust a level with a level gauge on the direction
of left-right, back-forth by adjusting suspension
bolts.
• Adjust a level on the direction of top-bottom by
adjusting supension bolts. Then the unit will be
declined to the bottomside so as to drain well.
5-7mm
(3/16"~5/16")
Indoor
WALL
Outdoor
Flat washer for M10
(accessory)
Flat washer for M10
(accessory)
Hanging bolt
(W3/8 or M10)
Nut
(W3/8 or M10)
Nut
(W3/8 or M10)
Suspension bolt
B
A
Washer
Nut
Suspension
bolts
Ceiling
Anchor nut
Suspension
bolts
Spring
washer
Max.
12mm Washer
Nut
: Tighten the nut and bolt to prevent unit falling.
DRILL A HOLE IN THE WALL.
• Drill the piping hole with a ø70mm hole core drill.
Drill the piping hole at either the right or the left with
the hole slightly slanted to the outdoor side.
Dim(mm) A B
Capacity(Btu/h)
18/24k 855 320
36k 1255 320
48k 1655 320

8Indoor Unit
Installation
Hang the Indoor unit on suspension bolt as per following guidelines:
1. Lift the indoor unit to sufficient height.
2. Insert the suspended part of four suspension bolt in the four hangers provided on the side of main body one
by one.
3. Lower the indoor unit till the hangers rest on their respective flat washer.
4. Adjust the level in the top down direction by adjusting the suspension bolts.
Inclined the indoor unit as per direction provided in the fig
Ceiling
Ceiling
10~20mm
10~20mm
1. Install declination of the indoor unit is very important for the drain of the convertible
type air conditioner.
2. Minimum thickness of the insulation for the connecting pipe shall be 10mm.
3. If the Installation Plates are fixed to horizontal line, the indoor unit after installing will
be declined to the bottomside.
Front of view
• The unit must be horizontal or inclined at angle.
• The inclination should be less than or equal to 1° or in between 10 to 20mm inclined in drain direction as
shown in fig.
• The unit must be declined to the bottomside of the unit when finished installation.
Side of view
: Installation Information For Declination
Indoor unit installation

Installation Manual 9
ENGLISH
Installation
Preparation of Piping
1. Cut the pipes and the cable.
nUse the accessory piping kit or the pipes purchased
locally.
nMeasure the distance between the indoor and the out-
door unit.
nCut the pipes a little longer than measured distance.
nCut the cable 1.5m longer than the pipe length.
2. Burrs removal
nCompletely remove all burrs from the cut cross section
of pipe/tube.
nPut the end of the copper tube/pipe to downward direc-
tion as you remove burrs in order to avoid to let burrs
drop in the tubing.
3. Flaring work
nCarry out flaring work using flaring tool as shown below.
Firmly hold copper tube in a bar(or die) as indicated
dimension in the table above.
4. Check
nCompare the flared work with figure below.
nIf 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(mm) Liquid(mm) Gas(mm) Liquid(mm)
<5.6(19,100) 12.7 6.35 0.5~0.8 0~0.5
<16.0(54,600) 15.88 9.52 0.8~1.0 0.5~0.8
<22.4(76,400) 19.05 9.52 1.0~1.3 0.5~0.8
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 =
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.
FLARE SHAPE and FLARE NUT TIGHTENING TORQUE
90°±2
45°±2
A
R=0.4~0.8
pipe size Torque(kgf.m) A(mm) flare shape
Ø6.35 1.8~2.5 8.7~9.1
Ø9.52 3.4~4.2 12.8-13.2
Ø12.7 5.5~6.6 16.2-16.6
Ø15.88 6.3~8.2 19.3-19.7

10 Indoor Unit
Installation
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.
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
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.
Opening shutoff valve
Closing shutoff valve
Shutoff
valve size
Ø6.35
Ø9.52
Ø12.7
Ø15.88
Ø22.2
Ø25.4
13.5-16.5
18-22
14-17
33-39
50-60
62-75
23-27
13.5-16.5
5.4-6.6 Hexagonal
wrench 4mm
Hexagonal
wrench 6mm
Hexagonal
wrench 10mm
8.1-9.9
27-33 36-44
-
11.5-13.9
22-28-
Tightening torque N-m(Turn clockwise to close)
Shaft(valve body)
Gas line piping attached to unit Cap(Valve lid) Service port Flare nut
Union
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 tempera-
ture: 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

Installation Manual 11
ENGLISH
Installation
Checking the Drainage
1. Set the air direction louvers up-and-down to the
position(horizontally) by hand.
To check the drainage.
1. Pour a glass of water on the evaporator using a ket-
tle.
2. Ensure the water flows through the drain hose of the
indoor unit without any leakage and goes out the
drain exit.
Drain piping
1. The drain hose should point downward for easy
drain flow.
2. Do not make drain piping like the following.
Downward slope
Do not raise Accumulated
drain water Tip of drain hose
dipped in water
Air
Waving
Water
leakage
Water
leakage Ditch
Less than
50mm gap
Water
leakage
Down-slope : 1/50~1/100
Terminal Block Indoor
1(L) 2(N) 3(A) 4(B)
INDOOR POWER INPUT
IDU IDU
Outdoor unit Indoor unit
Central controller
SODU SODU
DRY1 DRY2 GND INTERNET 12V
Outdoor unit
Connect the wires to the terminals on the control board individually according to the outdoor unit
connection.
•Ensure that the color of the wires of outdoor unit and the terminal No. are the same as those of
indoor unit respectively.
Wiring Connection
WARNING : Make sure that the screws of the terminal are free from looseness.
3. While merging numerous drain pipes, follow the procedure mentioned below.
Drain piping must have down-slope (1/50 to 1/100): be sure not to provide
up-and-down slope to prevent reversal flow.

12 Indoor Unit
Installation
CAUTION:
After the confirmation of the above conditions, prepare the wiring as follows:
1) Never fail to have an individual power specialized for the air conditioner. As for the method of
wiring, be guided by the circuit diagram posted on the inside of control box cover.
2) Provide a circuit breaker switch between power source and the unit.
3) The screws which fasten the wiring in the casing of electrical fittings are liable to come loose
from vibrations to which the unit is subjected during the course of transportation. Check them
and make sure that they are all tightly fastened. (If they are loose, it could give rise to burn-out
of the wires.)
4) Specification of power source
5) Confirm that electrical capacity is sufficient.
6) Be sure that the starting voltage is maintained at more than 90 percent of the rated voltage
marked on the name plate.
7) Confirm that the cable thickness is as specified in the power sources specification.
(Particularly note the relation between cable length and thickness.)
8) Never fail to equip a leakage breaker where it is wet or moist.
9) The following troubles would be caused by voltage drop-down.
• Vibration of a magnetic switch, damage on the contact point, fuse breaking, disturbance by the nor-
mal function of an overload protection device.
• Proper starting power is not given to the compressor.
HAND OVER
Teach the customer the operation and maintenance procedures, using the operation manual.
(air filter cleaning, temperature control, etc.)
WIRED REMOTE CONTROLLER INSTALLATION
• Since the room temperature sensor is in the remote controller, the remote controller box should be installed in a place away
from direct sunlight, high humidity and direct supply of cold air to maintain proper space temperature.
Install the remote controller about 5ft(1.5m) above the floor in an area with good air circulation at an average temperature.
Do not install the remote controller where it can be affected by:
- Drafts, or dead spots behind doors and in corners.
- Hot or cold air from ducts.
- Radiant heat from sun or appliances.
- Concealed pipes and chimneys.
- Uncontrolled areas such as an outside wall behind the remote controller.
- This remote controller is equipped with a seven segment LED. display. For proper display of the remote controller
LED's, the remote controller should be installed properly as shown in Fig.1.
(The standard height is 1.2~1.5 m from floor level.)
Fig.1 Typical locations for remote controller
5feet
(1.5meters)
no
no
no
yes
RemoteController
TEMP
RemoteController
TEMP
RemoteController
TEMP

Installation Manual 13
ENGLISH
Installation
Side Cover Assembly
1. Cover the sides of main body with side-
cover as shown in fig.
2. Lift slightly the edge of side-cover with
hands to fix the cover properly on the
panel.
3. Push the side-cover from front side (air
outlet side) towards the inlet grill side
to lock the side cover on the main
body.
4. Fasten the securing screw.
Cover the Sides
Lift the edge
with hand

14 Indoor Unit
Installation
Installation of Wired Remote Controller
22
1
3
3
<Wire guide grooves>
1. Please fix tightly using provided screw after placing remote controller setup board on the place where
you like to setup.
- Please set it up not to bend because poor setup could take place if setup board bends.
Please set up remote controller board fit to the reclamation box if there is a reclamation box.
2. Can set up Wired remote controller cable into three directions.
- Setup direction: the surface of wall reclamation, upper, right
- If setting up remote controller cable into upper and right side, please set up after removing remote controller
cable guide groove.
h Remove guide groove with long nose.
①
Reclamation to the surface of the wall
②
Upper part guide groove
③
Right part guide groove
Wall
Side
Wall
Side
Wall
Side
Wall
Side
<Connecting order>
<Separating order>
3. Please fix remote controller upper part into the
setup board attached to the surface of the wall, as
the picture below, and then, connect with setup
board by pressing lower part.
- Please connect not to make a gap at the remote con-
troller and setup boardʼs upper and lower, right and left
part.
When separating remote controller from setup
board, as the picture below, after inserting into the
lower separating hole using screw driver and then,
spinning clockwise, remote controller is separated.
- There are two separating holes. Please individually
separate one at a time.
- Please be careful not to damage the inside
components when separating.

Installation Manual 15
ENGLISH
Installation
4. Please connect indoor unit and remote controller using connection cable.
5. Please use extension cable if the distance between wired remote controller and indoor unit is more
than 10m.
Please check if connector is normally connected.
Connecting cable
Indoor
Unit side
When installing the wired remote controller, do not bury it in the wall.
(It can cause damage in the temperature sensor.)
Do not install the cable to be 50m or above.
(It can cause communication error.)
• When installing the extension cable, check the connecting direction of the connector of the
remote controller side and the product side for correct installation.
• If you install the extension cable in the opposite direction, the connector will not be connected.
• Specification of extension cable: 2547 1007 22# 2 core 3 shield 5 or above.

16 Indoor Unit
Installation
1
4
5
7
11
10
9
82
3
6
13
12
Please attach the inform label inside of the door.
Please choose proper language depend on your
country.
14
15
Name and function of wired remote controller(Accessory)
※ Some functions may not be operated and displayed depending on the product type.
※ It will display strange value to the room temperature if wired remote controller is not connected.
Model : PQRCVSL0 (Black Color)
PQRCVSL0QW (White Color)
1. Operation indication screen
2. Set temperature button
3. Fan speed button
• Fan Speed have 3 Steps.
4. ON/OFF button
5. Opration mode selection button
6. Wireless remote controller receiver
• Some products don't receive the wireless signals.
7. Air flow button
8. Subfunction button
9. Function setting button
10. Ventilation button
•
Not working.
11. Reservation
12. Up,down,left,right button
• To check the indoor temperature, press button.
13. Room temperature button
• Displays only the room temperature of the remote
controller perception.
• There is no control of room temperature.
• In case of fresh air intake unit, displays only the
temperature around remote controller.
14. Setting/Cancel button
15. Exit button

Installation Manual 17
ENGLISH
Installation
Dip Switch Setting of Indoor unit PCB
For Multi V Models, Dip switch 1, 2, 6, 8 must be set OFF.
Function Description Setting Off Setting On Default
SW1
SW2
SW3
SW4
SW5
SW6
SW7
SW8
Communication
Cycle
Group Control
Dry Contact Mode
Installation
Heater linkage
Ventilator linkage
Vane selection
(Console)
Region selection
Etc.
N/A (Default)
N/A (Default)
Selection of Master or Slave
Selection of Dry Contact
Mode
Fan continuous operation
N/A
Selection of Ventilator link-
age
Selection of up/down side
Vane
Selection tropical region
Spare
-
-
Master
Wired/Wireless remote
controller
Selection of Manual or Auto
operation Mode
Continuous operation Removall
-
Linkage Removal
Up side + Down side Vane
General model
-
-
-
Slave
Auto
-
-
Working
Up side Vane
Only
Tropical model
-
Off
Off
Off
Off
Off
Off
Off
Off

18 Indoor Unit
Installation
Group Control Setting
1. Group Control 1
nWired remote controller 1 + Indoor units
GND
Signal
12 V
Slave Slave Slave
Master
Display Error Message
Only connect serial signal and GND lines
between slave indoor unit
LGAP Network System
Master
nDip Switch in PCB
1. It is possible to 16 indoor units(Max) by one wired remote controller.
Set only one indoor unit to Master, set the others to Slave.
2. It is possible to connect with every type of indoor units.
3. It is possible to use wireless remote controller at the same time.
4. It is possible to connect with Dry Contact and Central controller at the same time.
- The Master indoor unit is possible to recognize Dry Contact and Central Controller only.
- In case of Central controller and Group controller at the same time, it is possible to connect stan-
dard 2series indoor units or later since Feb. 2009.
- In case of Central controller setting, the Central controller can control indoor units after setting only
the address of master indoor unit.
- Slave indoor unit will be operated like master indoor unit.
- Slave indoor unit can not be individually controlled by Central controller.
- Some remote controller canʼt perform with Dry Contact and Central controller at the same time.
So contact us further information about it.
- No. 3 Off - No. 3 On
Master Setting Slave Setting

Installation Manual 19
ENGLISH
Installation
5. In case of any error occurs at indoor unit, display on the wired remote controller.
Exception of the error indoor unit, an individual indoor unit control possibility.
6. In case of Group Control, it is possible to use following functions.
- Selection of operation options (operation/stop/mode/set temperature)
- Control of flow rate (High/Middle/Low)
- It is not possible at some functions.
hMaster/Slave setting of indoor units be set possible using a PCB Dip Switch.
h It is possible to connect indoor units since Feb. 2009. In the other cases, please contact LGE.
h It can be the cause of malfuctions when there is no setting of master and slave.
hIt is possible to control N indoor units by wired remote controller M units. (M + N ≤ 17 Units)
Set only one indoor unit to Master, set the others to Slave.
Set only one wired remote controller to Master, set the others to Slave.
Other than those, it is same with the Group Control 1.
GND
Signal
12 V
Slave
Slave
Slave
Slave
Display Error Message
Donʼt connect serial 12V line
Master
LGAP Network System
Master
2. Group Control 2

20 Indoor Unit
Installation
3. Group Control 3
nMixture connection with indoor units and Fresh Air Intake Unit
hIn case of connecting with standard indoor unit and Fresh Intake Unit, separate Fresh Air
Intake Unit with standard units. (Because setting temperature are different.)
hOther than those, it is same with Group Control 1.
GND
Signal
12 V
LGAP Network System
Display Error Message
FAU
Master FAU
Slave Master
Master
Master
Slave
FAU Standard Standard FAU FAU Standard Standard FAU
* FAU : Fresh Air Intake Unit
Standard: Standard Indoor Unit