LG Multi V ARUN053GF2 User manual

INSTALLATION MANUAL
Variable Refrigerant Flow Outdoor Unit
4.4 Tons

The instructions included in this manual must be followed to prevent product malfunction, property damage, injury, or death to the user or
other people. Incorrect operation due to ignoring any instructions will cause harm or damage. The level of seriousness is classified by the
symbols described below.
Do not throw away, destroy, or lose this manual.
Please read carefully and store in a safe place for future reference.
Content familiarity required for proper installation.
A summary list of safety precautions begins on page 3.
For more technical materials such as submittals, engineering
databooks, and catalogs, visit www.lg-vrf.com.
For continual product development, LG Electronics U.S.A., Inc., reserves the right to change specifications without notice.
©LG Electronics U.S.A., Inc.
This document, as well as all reports, illustrations, data, information, and other materials are the property of LG Electronics U.S.A., Inc.
PROPRIETARY DATA NOTICE
This document, as well as all reports, illustrations, data, information, and
other materials are the property of LG Electronics U.S.A., Inc., and are
disclosed by LG Electronics U.S.A., Inc., only in confidence.
This document is for design purposes only.

3
Product Data
Due to our policy of continuous product innovation, some specifications may change without notification.
©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
This symbol indicates a potentially hazardous situation which, if not avoided, may result in death or serious injury.
This symbol indicates additional helpful information such as an explanation, a comment, or a clarication about the subject.
This symbol indicates a recommendation or tip. Recommendations instruct the user to apply the suggested practice to ensure the best operating results in order
to achieve the maximum benet of the product. Tips contain practical information that may help the user solve a problem or describe actions that may save time.
SAFETY INSTRUCTIONS
The instructions below must be followed to prevent product malfunction, property damage, injury or death to the user or other people. Incor-
rect operation due to ignoring any instructions will cause harm or damage. The level of seriousness is classified by the symbols described
below.
Do not install, remove, or re-install the unit by yourself
(customer). Ask the dealer or an authorized technician to
install the unit.
Improper installation by the user may result in water leakage, re,
explosion, electric shock, physical injury or death.
For replacement of an installed unit, always contact an
authorized LG service provider.
There is risk of re, electric shock, explosion, and physical injury or death.
Be very careful when transporting the product.
• Do not attempt to carry the product without assistance.
• Some products use polypropylene bands for packaging. Do not use
polypropylene bands to lift the unit.
• Suspend the unit from the base at specified positions.
• Support the unit a minimum of four points to avoid slippage from
rigging apparatus.
The unit is shipped with refrigerant and the service valves
closed. Do not open service valves on the unit until all
non-condensables have been removed from the piping
system and authorization to do so has been obtained from
the commissioning agent.
There is a risk of equipment damage, refrigerant contamination, refriger-
ant loss, physical injury or death.
The unit is shipped with refrigerant and service valves
closed. Do not run the compressor with the service valves
closed.
There is a risk of equipment damage, explosion, physical injury, or death.
Dispose the packing materials safely.
• Packing materials, such as nails and other metal or wooden parts,
may cause puncture wounds or other injuries.
• Tear apart and throw away plastic packaging bags so that children
may not play with them and risk suffocation and death.
Install the unit considering the potential for strong winds or
earthquakes.
Improper installation may cause the unit to fall over, resulting in physical
injury or death.
If the air conditioner is installed in a small space, take
measures to prevent the refrigerant concentration from
exceeding safety limits in the event of a refrigerant leak.
Consult the latest edition of ASHRAE (American Society of Heating,
Refrigerating, and Air Conditioning Engineers) Standard 15. If the
refrigerant leaks and safety limits are exceeded, it could result in personal
injuries or death from oxygen depletion.
Wear protective gloves when handling equipment. Sharp
edges may cause personal injury.
Install the unit in a safe location where nobody can step on
or fall onto it.
There is risk of unit damage, physical injury or death.
Do not install the unit on a defective stand.
It may result in an accident that causes product damage or personal injury
or death.
Do not change the settings of the protection devices.
If the pressure switch, thermal switch, or other protection device is
shorted and forced to operate improperly, or parts other than those
specied by LG are used, there is risk of re, electric shock, explosion,
and physical injury or death.
Don’t store or use ammable gas / combustibles near the unit.
There is risk of product failure, re, explosion, and physical injury or death.
Don’t install the unit where it’s directly exposed to ocean winds.
Ocean winds may cause corrosion, particularly on the condenser and
evaporator ns, which, in turn could cause product malfunction or inef-
cient performance.
Replace all control box and panel covers.
If cover panels are not installed securely, dust, water and animals may
enter the water source unit, causing re, electric shock, and physical in-
jury or death.
Always check for system refrigerant leaks after the unit has
been installed or serviced.
Low refrigerant levels may cause product failure, and exposure to high
concentration levels of refrigerant gas may lead to illness or death.
INSTALLATION
TABLE OF SYMBOLS

4
MULTI V Space II Installation Manual
Due to our policy of continuous product innovation, some specifications may change without notification.
©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
SAFETY INSTRUCTIONS
Keep the unit upright during installation.
To avoid vibration or water leakage.
When installing the unit in a low-lying area, or a location that
is not level, use a raised concrete pad or concrete blocks to
provide a solid, level foundation.
This may prevent water damage and reduce abnormal vibration.
Properly insulate all cold surfaces to prevent “sweating.”
Cold surfaces such as uninsulated piping can generate condensate that
may drip and cause a slippery oor condition and / or water damage to
walls.
When installing the unit in a hospital, mechanical room, or
similar electromagnetic eld (EMF) sensitive environment,
provide sufcient protection against electrical noise.
Inverter equipment, power generators, high-frequency medical equip-
ment, or radio communication equipment may cause the air conditioner to
operate improperly. The unit may also affect such equipment by creating
electrical noise that disturbs medical treatment or image broadcasting.
Do not use the product for special purposes such as
preserving foods, works of art, wine coolers, or other
precision air conditioning applications. The equipment is
designed to provide comfort cooling and heating.
There is risk of property damage.
Do not make refrigerant substitutions. Use R410A only.
If a different refrigerant is used, or air mixes with original refrigerant, the
unit will malfunction and be damaged.
When connecting refrigerant tubing, remember to allow for
pipe expansion.
Improper piping may cause refrigerant leaks and system malfunction.
Do not install the unit in a noise sensitive area.
Take appropriate actions at the end of HVAC equipment life
to recover, recycle, reclaim or destroy R410A refrigerant
according to applicable U.S. Environmental Protection
Agency (EPA) rules.
INSTALLATION, CONTINUED
The information contained in this manual is intended for use
by an industry-qualied, experienced, certied electrician
familiar with the U.S. National Electric Code (NEC) who is
equipped with the proper tools and test instruments.
Failure to carefully read and follow all instructions in this manual can
result in equipment malfunction, property damage, personal injury or
death.
All electric work must be performed by a licensed electrician
and conform to local building codes or, in the absence of
local codes, with the National Electrical Code, and the
instructions given in this manual.
If the power source capacity is inadequate or the electric work is not
performed properly, it may result in re, electric shock, physical injury or
death.
High voltage electricity is required to operate this system.
Adhere to the National Electrical Codes and these
instructions when wiring.
Improper connections and inadequate grounding can cause accidental
injury or death.
Always ground the unit following local, state, and National
Electrical Codes.
There is risk of re, electric shock, and physical injury or death.
Properly size all circuit breakers or fuses.
There is risk of re, electric shock, explosion, physical injury or death.
Refer to local, state, and federal codes, and use power wires
of sufcient current capacity and rating.
Wires that are too small may generate heat and cause a re.
Secure all eld wiring connections with appropriate wire
strain relief.
Improperly securing wires will create undue stress on equipment power
lugs. Inadequate connections may generate heat, cause a re and phys-
ical injury or death.
Properly tighten all power lugs.
Loose wiring may overheat at connection points, causing a re, physical
injury or death.
Do not change the settings of the protection devices.
If the pressure switch, thermal switch, or other protection devices
are bypassed or forced to work improperly, or parts other than those
specied by LG are used, there is risk of re, electric shock, explosion,
and physical injury or death.
Turn the power off at the nearest disconnect before servicing
the equipment.
Electrical shock can cause physical injury or death.
Do not supply power to the unit until all installation and pre-
commissioning tasks are complete and the commissioning
agent indicates it is safe to do so.
WIRING
Auto-addressing should be carried out with power applied to all indoor and outdoor units. Auto-addressing should also
be performed any time an indoor unit PCB is changed.

5
Product Data
Due to our policy of continuous product innovation, some specifications may change without notification.
©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
SAFETY INSTRUCTIONS
Clean up the site after installation is nished, and check that no metal scraps, screws, or bits of wiring have been left
inside or surrounding the unit.
Do not allow water, dirt, or animals to enter the unit.
There is risk of unit failure, re, electric shock, physical injury or death.
Do not provide power to or operate the unit if it is ooded or
submerged.
There is risk of re, electric shock, physical injury or death.
Use a dedicated power source for this product.
There is risk of re, electric shock, physical injury or death.
Do not operate the disconnect switch with wet hands.
There is risk of re, electric shock, physical injury or death.
Periodically verify the equipment mounts have not
deteriorated.
If the base collapses, the unit could fall and cause property damage,
product failure, physical injury or death.
Do not touch the refrigerant piping during or after operation.
It can cause burns or frostbite.
Do not operate the unit with the panel(s) or protective
cover(s) removed; keep ngers and clothing away from
moving parts.
The rotating, hot, cold, and high-voltage parts of the unit can cause
physical injury or death.
If gas leaks out, ventilate the area before operating the unit.
Leaking gas may cause re, electric shock, explosion, physical injury or
death if the unit is mounted in an enclosed, low-lying, or poorly ventilated
area and the system develops a refrigerant leak.
To avoid physical injury, use caution when cleaning or
servicing the air conditioner.
Do not turn off the main power switch after operation has
been stopped.
Wait at least ve (5) minutes before turning off the main power
switch, otherwise it may result in product malfunction.
Do not use this equipment in mission critical or special-
purpose applications such as preserving foods, works of art,
wine coolers or refrigeration. The equipment is designed to
provide comfort cooling and heating.
Oil, steam, sulfuric smoke, etc., can signicantly reduce the performance
of the unit, or damage its parts.
Provide power to the compressor crankcase heaters at least
six (6) hours before operation begins.
Starting operation with a cold compressor sump(s) may result in severe
bearing damage to the compressor(s). Keep the power switch on during
the operational season.
Do not block the inlet or outlet.
Unit may malfunction.
Do not open the inlet grille of the unit during operation. Do
not operate the unit with the panels or guards removed. Do
not insert hands or other objects through the inlet or outlet
with the unit is plugged in. Do not touch the electrostatic
lter, if the unit includes one.
The unit contains sharp, rotating, hot, and high voltage parts that can
cause personal injury and / or electric shock.
OPERATION

6
MULTI V Space II Installation Manual
Due to our policy of continuous product innovation, some specifications may change without notification.
©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
Safety Instructions ...................................................................................................................................................................................................... 3-5
Space II Unit Specications / Electrical Data............................................................................................................................................................... 7
R410A Refrigerant .......................................................................................................................................................................................................... 8
General Installation Guidelines................................................................................................................................................................................ 9-26
Location Selection ........................................................................................................................................................................................................ 9
Seacoast Applications ................................................................................................................................................................................................ 10
Required Clearances............................................................................................................................................................................................. 10-12
Rigging Instructions.................................................................................................................................................................................................... 13
Mounting Bolt Location............................................................................................................................................................................................... 14
Foundation for Installation .......................................................................................................................................................................................... 14
Piping Preparation ................................................................................................................................................................................................ 15-16
Piping Materials and Handling...............................................................................................................................................................................16-25
Refrigerant Piping Connections............................................................................................................................................................................. 27-44
Pipe Routing............................................................................................................................................................................................................... 27
Device Connection Limitations ................................................................................................................................................................................... 27
Refrigerant Piping System Examples....................................................................................................................................................................28-29
Selecting the Refrigerant Piping................................................................................................................................................................................. 30
Required LATS File..................................................................................................................................................................................................... 31
Acceptable Piping Layouts ......................................................................................................................................................................................... 32
Branch Pipe Fittings ..............................................................................................................................................................................................33-34
Vacuum Mode............................................................................................................................................................................................................. 35
Leak Test .................................................................................................................................................................................................................... 36
Evacuation.................................................................................................................................................................................................................. 37
Additional Refrigerant Charge ............................................................................................................................................................................... 38-39
Refrigerant Piping Insulation .................................................................................................................................................................................40-43
Electrical Wiring ...................................................................................................................................................................................................... 45-62
General Information.................................................................................................................................................................................................... 45
Power Wiring .............................................................................................................................................................................................................. 46
Wiring and Cable Terminations................................................................................................................................................................................... 47
Communication Cables ......................................................................................................................................................................................... 48-50
Space II Unit DIP Switch Settings............................................................................................................................................................................... 51
Auto Addressing the Indoor Units .......................................................................................................................................................................... 52-54
Group Addressing.................................................................................................................................................................................................. 55-57
Self Diagnosis Functions.......................................................................................................................................................................................58-62
Caution for Refrigerant Leakage............................................................................................................................................................................ 63-64
Introduction................................................................................................................................................................................................................. 63
Refrigerant concentration calculation ......................................................................................................................................................................... 64
Installation Checklists............................................................................................................................................................................................. 65-72
TABLE OF CONTENTS

7
Product Data
Due to our policy of continuous product innovation, some specifications may change without notification.
©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
Unit Model Number 4.4 Ton
ARUN053GF2
Cooling Performance
Nominal Cooling Capacity (Btu/h)153,000
Rated Cooling Capacity (Btu/h)254,000
Heating Performance
Nominal Heating Capacity (Btu/h)159,000
Rated Heating Capacity (Btu/h)260,000
Operating Range
Cooling (°F DB) 23 - 118
Heating (°F WB) (-4) - +60
Compressor
Inverter Quantity Inverter
Oil/Type PVE/FVC68D
Fan (Rear Discharge)
Type Propeller (BLDC)
Motor Output (kW) x Qty. 0.90 x 1
Motor/Drive Brushless Digitally Controlled/Direct
Operating Range (RPM) Cooling 80-813
Heating 80-813
Maximum Air Volume (CFM) 3,532
External Static Pressure Fan (inches WG) 0.12 - 0.20
Unit Data
Refrigerant Type R410A
Refrigerant Control/Location EEV/Indoor Unit
Max. Number Indoor Units/System39
Sound Pressure dB(A) (Rear Fan Side/Front)453 / 68
Net Unit Weight (lbs.) 320
Shipping Weight (lbs.) 346
Communication Cables5,6 2 x 18
Heat Exchanger
Material and Fin Coating Copper Tube/Aluminum Fin and GoldFin™
Rows/Fins per inch 2/14
Piping7
Liquid Line Connection (in., OD) 3/8 Braze
Vapor Line Connection (in., OD) 3/4 Braze
Factory Charge lbs. of R410A 7.7
Table 1: Single-Frame 208-230V Heat Pump Unit Specications.
1Nominal capacity applied with non-ducted indoor units, and is rated 0 ft. above sea level with 25 ft.
of refrigerant line per indoor unit and a 0 ft. level difference between outdoor and indoor units. All
capacities are net with a Combination Ratio between 95–105%. (Nominal capacity is outside the scope
of AHRI Standard 210/240.)
Nominal cooling capacity rating obtained with air entering the indoor unit at 80ºF dry bulb (DB) and 67ºF
wet bulb (WB) and outdoor ambient conditions of 95ºF dry bulb (DB) and 75ºF wet bulb (WB).
Nominal heating capacity rating obtained with air entering the indoor unit at 70ºF dry bulb (DB) and
59ºF wet bulb (WB) and outdoor ambient conditions of 47ºF dry bulb (DB) and 43ºF wet bulb (WB).
2Rated capacity is certified under AHRI Standard 210/240. See www.ahrinet.org for information.
3The System Combination Ratio must be between 50–130%.
4Sound pressure levels are tested in an anechoic chamber under ISO Standard 3745
5All communication cable to be minimum 18 AWG, 2-conductor, stranded, shielded, and must comply
with applicable local and national codes.
6Power wiring cable is field provided and must comply with the applicable local and national codes. See
below for detailed electrical data.
7Refer to the Refrigerant Piping section of this manual for correct line sizing. Contractor must use LG
manufactured Y-Branch and Header Kits only. Designer must verify refrigerant piping design configura-
tion using LG’s computerized refrigerant piping (LATS Multi V) software to validate the pipe design.
Nominal Tons Unit Model No. Compressor Qty. Compressor Motor (A) Fan Qty. Condenser Fan Motor (A) MCA MOP
4.4 ARUN053GF2 1 21.7 1 4.0 31.2 50
Table 2: Multi V Space II Electrical Data
Voltage tolerance is ±10%.
Maximum allowable voltage unbalance is 2%.
MCA = Minimum Circuit Ampacity.
Maximum Overcurrent Protection (MOP) is calculated as follows: (Largest motor FLA x 2.25) + (Sum of
other motor FLA) rounded down to the nearest standard fuse size.
GENERAL DATA
Space II Unit Specications / Electrical Data

8
MULTI V Space II Installation Manual
Due to our policy of continuous product innovation, some specifications may change without notification.
©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
R410A Refrigerant
• Piping wall thickness must comply with the applicable local, state, and federal codes for the 551 psi design pressure of R410A.
• Because R410A is a combination of R32 and R125, the required additional refrigerant must be charged in its liquid state. If the refrig-
erant is charged in its gaseous state, its composition changes and the system will not work properly.
GENERAL DATA
R410A Refrigerant
R410A refrigerant has a higher operating pressure in comparison to R22 refrigerant and, therefore, all piping system materials installed must
have a higher resisting pressure than the materials traditionally used in R22 systems.
R410A refrigerant is an azeotrope of R32 and R125, mixed at 50:50, so the ozone depletion potential (ODP) is 0. Many countries have
approved of and encouraged R410A for use as an environment friendly refrigerant.
• To prevent the refrigerant cylinder from exploding, do not place it in direct sunlight.
• Do not use any piping that has not been approved for use in high-pressure refrigerant systems.
• To prevent the piping from softening, do not heat it more than necessary during installation.

9
General Installation Guidelines
Due to our policy of continuous product innovation, some specifications may change without notification.
©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
Location Selection
Select a location for installing the unit that will meet the following conditions:
• Where the unit will not be subjected to direct thermal radiation from other heat sources.
• Where operating sound from the unit will not disturb inhabitants of surrounding buildings.
• Where the unit will not be exposed to direct, strong winds.
• Where there is enough strength to bear the weight of the unit.
• Include space for drainage to ensure condensate flows properly out of the unit when it is in heating mode.
• Include enough space for air flow and for service access.
• To avoid the possibility of fire, do not install the unit in an area where combustible gas may generate, flow, stagnate, or leak.
• Do not install the unit in a location where acidic solution and spray (sulfur) are often used.
• Do not use the unit in environments where oil, steam, or sulfuric gas are present.
• Install a fence to prevent vermin from crawling into the unit or unauthorized individuals from accessing it.
To ensure the Space II unit operates properly, certain measures are required in locations where there is a possibility of heavy snowfall or
severe wind chill or cold:
1. Prepare for severe winter wind chills and heavy snowfall, even in areas of the country where these are unusual phenomena.
2. Position the unit so that its airflow fans are not buried by direct, heavy snowfall. If snow piles up and blocks the airflow, the
system may malfunction.
3. Install a snow protection hood.
4. To prevent snow and heavy rain from entering the unit, install the suction and discharge ducts facing away from direct winds.
Additionally, the following conditions should be taken into considerations when the unit operates in defrost mode:
• If the unit is installed in a highly humid environment (near an ocean, lake, etc.), ensure that the site is well-ventilated and has a lot of
natural light. (Example: Install on a rooftop.)
• Sidewalks or parking lots near the Space II unit may accumulate moisture after unit operates in defrost mode that can turn to ice.
The unit may take longer to provide heat, or heating performance will be reduced in winter if the unit is installed:
1. In a narrow, shady location.
2. Near a location that has a lot of ground moisture.
3. In a highly humid environment.
4. In an area in which condensate does not drain properly.
GENERAL INSTALLATION GUIDELINES
Location Selection
Ambient Air Conditions
• Avoid exposing the Space II unit to steam, combustible gases, or other corrosive elements.
• Avoid exposing the unit to discharge from boiler stacks, chimneys, steam relief ports, other air conditioning units, kitchen vents,
plumbing vents, and other sources of extreme temperature, gases, or substances that may degrade performance or cause damage
to the unit.
• When installing multiple Space II units, avoid placing the units where discharge of one Space II unit will blow into the inlet side of an
adjacent unit.

10
MULTI V Space II Installation Manual
Due to our policy of continuous product innovation, some specifications may change without notification.
©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
• Multi V Space II should be installed in a soundproofed mechanical
room.
• Avoid installing the Space II unit where it would be directly exposed
to ocean winds.
• Install the outdoor unit on the side of the building opposite from
direct ocean winds.
• Select a location with good drainage.
• Periodically clean dust or salt particles off of the heat exchanger
with water.
• If the Space II unit must be placed in a location where it would be
subjected to direct ocean winds, install a concrete windbreaker
strong enough to block any winds.
Additional anti-corrosion treatment may need to be applied to the
outdoor unit at oceanside locations.
Ocean winds may cause corrosion, particularly on the condenser
and evaporator ns, which, in turn could cause product malfunction
or inefcient performance.
Ocean winds
Ocean winds
GENERAL INSTALLATION GUIDELINES
Oceanside Applications / Required Clearances
Figure 1: Oceanside Placement.
Oceanside Applications
Required Clearances
• Allow adequate clearance for the system louvers
(see figure at right).
• Automatic louver installation = 6 inches
• Manual louver installation = 6 inches
• Fixed louver installation = 4 inches (Basic space)
• Place the product so that the door of the Space II
unit's enclosure can be opened completely for
easier installation and service access.
Water Drain Outlet
• An outlet is required to allow water drainage from
the bottom of the Space II unit enclosure (conden-
sation could form during unit operation).
Figure 2: Required Clearances for Multi V Space II.
20
45
1/2
Min (34 4/5 + 1/5)
25 3/4
Door Width
35 1/2
4 (Min)
4 (Min)
Unit = Inches
(Min) 63 1/5 + 1/5
3 1/2
40 1/2 26 5/8
2 3 5/8
*
*
*
Automatic/Manual Louver = 6” Min.
Fixed Louver = 4” Min.
Drain holes
Drain pipe
Figure 3: Water Drain Outlet.

11
General Installation Guidelines
Due to our policy of continuous product innovation, some specifications may change without notification.
©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
Louver Specifications
26
23
1/2
38
1/4
3 1/4
Unit = Inches
Figure 4: Recommended Top and Side Clearance Spaces for the Multi V Space II Louver.
Do not bend the louvers as
shown at right, a bent louver
disrupts the air circulation.
Figure 5: Recommended Effective Opening Ratio of Louver
Required Clearances
GENERAL INSTALLATION GUIDELINES

12
MULTI V Space II Installation Manual
Due to our policy of continuous product innovation, some specifications may change without notification.
©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
A ≥ 3/8
B ≥ 19-3/4
C ≥ 3/8
D:Waterproof wall installation
condition
A ≥ 3/8
B ≥ 19-3/4
C ≥ 3/8
D:Waterproof wall installation
condition
A ≥ 3/8
B ≥ 19-3/4
C ≥ 3/8
D:Waterproof wall installation
condition
E ≥ 3/4
A ≥ 3/8
B ≥ 19-3/4
A ≥ 3/8
B ≥ 19-3/4
E ≥ 3/4
If a ≤ 11-3/4 D ≥ 5-7/8
If 11-3/4 a ≤ 19-3/4,
D ≥ 9-3/4
Proper airflow through the Space II unit coil is critical for correct unit operation. When installing the multiple Space II units, consider service,
inlet, and outlet, and minimum allowable space requirements as illustrated in the diagrams below.
GENERAL INSTALLATION GUIDELINES
Required Clearances
Table 3: Minimum Space Requirements or Multiple Space II Units.

13
General Installation Guidelines
Due to our policy of continuous product innovation, some specifications may change without notification.
©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
Rigging Instructions
• When lifting the unit, use lifting straps and place
around the unit as shown below.
• Always lift the unit using properly sized lifting
straps rated to carry the unit weight.
• Ensure the straps are long enough to maintain a
maximum of a 40° angle as shown at “A”.
GENERAL INSTALLATION GUIDELINES
Rigging Instructions
Figure 6: Transporting the Space II Unit.
• Use appropriate moving equipment to transport each frame; ensure the equipment is capable of supporting the weights listed above.
• Wear protective gloves when handling equipment. Sharp edges may cause personal injury.
• Some products include polypropylene bands around the unit for packaging. Do not use polypropylene bands to lift the unit.
• Tear apart and throw away plastic packaging bags so that children may not play with them and risk suffocation and death.
• Lift the unit from the base at specified locations. Support the unit at a minimum of six (6) points to avoid slippage from the rigging
apparatus.
• Do not drop the unit when carrying it with a forklift.
• Use a minimum of three (3) lifting straps.
• Place a protective cloth or other soft material at the locations where the casing comes in contact with the lifting straps to prevent
damage to painted surfaces.
• Always know where the unit’s center of gravity is before lifting. Hoist the unit with the center of gravity centered among the lifting
straps.
• Caution when using forklift to transport an unpackaged unit. Consider the unit’s center of gravity when lifting. Protect the painted
surfaces as necessary to prevent damage to the unit finish.
Capacity (ton) Net Weight (lbs.) Shipping Weight (lbs.)
4.4 320 346
Table 4: Multi V Space II Net and Shipping Weights.
≤40°
Mounting Rail
A:
B:
A
A

14
MULTI V Space II Installation Manual
Due to our policy of continuous product innovation, some specifications may change without notification.
©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
Any installation deciency may cause unit to
fall down, resulting in a personal injury.
Mounting Bolt Location /
Foundation for Installation
Securely attach the Space II unit as shown
in Figure 12, using pad, base rails, or other
mounting platform that is securely anchored
to the ground or building structure. Refer to
the dimensional drawing in the “Product Data”
section, and follow the applicable local code
for clearance, mounting, anchor, and vibration
attenuation requirements.
The underlying structure or foundation must
be designed to support the weight of the unit.
Avoid placing the unit in a low lying area where
water may accumulate.
Figure 7: Space II Unit—Mounting Methods1.
1All referenced materials are to be eld-supplied.
Images are not to scale. All dimensions ±0.25 inches.
A: Corners must be firmly attached, otherwise, the support will bend.
B: Use a 3/8 inch anchor bolt.
D: Insert cushion pad between Space II unit and base support to ensure sufficient anti-vibration coverage.
E: Pipe and wiring space.
F: H-beam support.
G: Concrete base support.
28 1/2
20 1/2
Foundation bolt executing method
8
Nut
3
3
8
Spring washer
Frame
Anti-vibration
materials
Four bolt are
required
3 thread ridges
H-Beam
Concrete
base
4
G
Units = Inches
Mounting Bolt / Foundation for Installation
GENERAL INSTALLATION GUIDELINES
• When deciding on a location to place the Space II unit, choose an area where run-off from defrost mode will not accumulate and freeze
on sidewalks and driveways.
• Do not install a tube or pipe for the water in the base pan. Follow the drain path to properly remove condensation.
• Do not install the suction hole and the discharge hole of the unit so that either directly faces seasonal winds as this can cause freezing.

15
General Installation Guidelines
Due to our policy of continuous product innovation, some specifications may change without notification.
©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
GENERAL INSTALLATION GUIDELINES
Piping Preparation
• Do not allow the refrigerant to leak during brazing; if the refrigerant combusts, it generates a toxic gas.
• Do not braze in an enclosed location, and always test for gas leaks before / after brazing.
3. Flaring the pipe end.
• Use the proper size flaring tool to finish flared connections as
shown.
• ALWAYS create a 45° flare when working with R410A.
Creating a Flare Fitting
One of the main causes of refrigerant leaks is defective flared
connections. Create flared connections using the procedure below.
1. Cut the pipe to length.
• Measure the distance between the indoor unit and the outdoor unit.
• Cut the pipes a little longer than measured distance.
2A. Remove the burrs.
• Completely remove all burrs from pipe ends.
• When removing burrs, point the end of the copper pipe down to
avoid introducing foreign materials in the pipe.
2B. Slide the flare nut onto the copper tube.
Copper
tube
90° Slanted Uneven Rough
Pipe
Reamer
Point
down
Flare nut
Copper
tube
Bar
Copper pipe
Clamp handle Red arrow
Cone
oe
andle
Bar

Slanted
nide i hin with no rathe
Smooth
ven length
amanged
urae
Craed Uneven
thine
norret Flare
1.
2A2B.
3.
4.
4. Carefully inspect the flared pipe end.
• Compare the geometry with the figure to the right and dimensions
as detailed in Figure 8.
• If the flare is defective, cut it off and re-do procedure.
• If flare looks good, blow clean the pipe with dry nitrogen.
90° 2
45°
2
A
R=0.4~0.8
Figure 8: Dimensions of the Flare.
Indoor /unit
(Btu/h)1
Pipe “A”
Vapor (in. O.D.) Liquid (in. O.D.) Vapor (in.) Liquid (in.)
≤19,100 1/2 1/4 5/8 ~ 11/16 7/16 ~ 1/2
<54,600 5/8 3/8 5/8 ~ 11/16 5/8 ~ 11/16
≤76,400 3/4 3/8 3/4 ~ 13/16 5/8 ~ 11/16
Table 5: Flared Connection Dimensions.
Piping Preparation
Multi V Space II Pipe Connections
1. Do not use kinked pipe caused by excessive bending in one specific area on its length.
2. Braze the pipes to the service valve pipe stub of the outdoor unit.
3. After brazing, check for refrigerant gas leaks.
4. When selecting flare fittings, always use a 45° fitting rated for use with high pressure refrigerant R410A. Selected fittings must also
comply with local, state, or federal standards.
1ARNU093-123-153TN*2, ARNU183-243TM*2, ARNU153-183-243BG*2 piping connections: 5/8 in. O.D.
Vapor Piping, 3/8 in. O.D. Liquid Piping; Flare Size “A”: 5/8 ~ 11/16 in. Vapor, 5/8 ~ 11/16 in. Liquid.

16
MULTI V Space II Installation Manual
Due to our policy of continuous product innovation, some specifications may change without notification.
©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
GENERAL INSTALLATION GUIDELINES
Union
Figure 9: Tightening the Flare Nuts.
Pipe size (Inches O.D.) Tightening torque (ft-lbs) Width of the are (A [inches])
3/8Ø 24.1 - 29.4 1/2
1/2Ø 36.5 - 44.5 5/8
5/8Ø 45.5 - 55.6 3/4
Table 6: Tightening Torque for Flare Nuts.
Tightening the Flare Nuts
1. When connecting the flare nuts, coat the flare (inside and outside) with polyvinyl ether (PVE)
refrigeration oil only.
2. Initially hand tighten the flare nuts using three (3) or four (4) turns.
3. To finish tightening the flare nuts, use both a torque wrench and a backup wrench.
4. After all the piping has been connected and the caps have been tightened, check for refrigerant gas leaks.
Loosening the Flare Nuts
Always use two (2) wrenches to loosen the flare nuts.
Do not use polyolyester (POE) or any other type of mineral oil as a thread lubricant. These lubricants are not compatible with PVE oil used in
this system and create oil sludge leading to equipment damage and system malfunction.
Piping Preparation / Piping Materials and Handling
Pipes used for the refrigerant piping system must include the specified thickness, and the
interior must be clean.
While handling and storing, do not bend or damage the pipes, and take care not to contami-
nate the interior with dust, moisture, etc.
Dry Clean Airtight
Principles No moisture should be inside the piping. No dust should be inside the piping. No leaks should occur.
Problems
Caused
- Significant hydrolysis of refrigerant oil.
- Refrigerant oil degradation.
- Poor insulation of the compressor.
- System does not operate properly.
- EEVs, capillary tubes are clogged.
- Refrigerant oil degradation.
- Poor insulation of the compressor.
- System does not operate properly.
- EEVs and capillary tubes become
clogged.
- Refrigerant gas leaks / shortages.
- Refrigerant oil degradation.
- Poor insulation of the compressor.
- System does not operate properly.
Solutions - Remove moisture from the piping.
- Piping ends should remain capped until
connections are complete.
- Do not install piping on a rainy day.
- Connect piping properly at the unit’s side.
- Remove caps only after the piping is
cut, the burrs are removed, and after
passing the piping through the walls.
- Evacuate system to a minimum of 500
microns and insure the vacuum holds at
that level for 24 hours
- Remove dust from the piping.
- Piping ends should remain capped until
connections are complete.
- Connect piping properly at the side of
the unit.
- Remove caps only after the piping is cut
and burrs are removed.
- Retain the cap on the piping when
passing it through walls, etc.
- Test system for air tightness.
- Perform brazing procedures that comply
with all applicable standards.
- Perform flaring procedures that comply
with all applicable standards.
- Perform flanging procedures that
comply with all applicable standards.
- Insure that refrigerant lines are pressure
tested to 550 psig.
Moisture Dust Leaks
Figure 10: Keep Piping Capped While Storing.
Table 7: Three Principles of Refrigerant Piping.
Piping Materials and Handling

17
General Installation Guidelines
Due to our policy of continuous product innovation, some specifications may change without notification.
©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
GENERAL INSTALLATION GUIDELINES
Figure 11: Refrigerant Pipe Brazing.
Pressure-reducing
Valve
Valve
Taping
Nitrogen
Pipe to
be brazed
Refrigerant
Piping
It is imperative to keep the piping system free of contaminants and debris such as
copper burrs, slag, or carbon dust during installation.
1. All joints are brazed in the field. Multi V Space II refrigeration system components contain very small capillary tubes, small orifices,
electronic expansion valves, oil separators, and heat exchangers that can easily become blocked. Proper system operation depends on
the installer using best practices and utmost care while assembling the piping system.
• Store pipe stock in a dry place; keep stored pipe capped and clean.
• Blow clean all pipe sections with dry nitrogen prior to assembly.
2. Proper system operation depends on the installer using best practices and the utmost care while assembling the piping system.
• Use adapters to assemble different sizes of pipe.
• Always use a non-oxidizing material for brazing. Do not use flux, soft solder, or anti-oxidant agents. If the proper material is not used,
oxidized film may accumulate and clog or damage the compressors. Flux can harm the copper piping or refrigerant oil.
• Use a tubing cutter, do not use a saw to cut pipe. De-bur and clean all cuts before assembly.
3. Brazing joints:
• Use a dry nitrogen purge operating at a minimum pressure of three (3) psig and maintain a steady flow.
• Use a 15% silver phosphorous copper brazing alloy to avoid overheating and produce good flow.
• Protect isolation valves, electronic expansion valves, and other heat-sensitive control components from excessive heat with a wet rag or
heat barrier spray.
Brazing Practices
Piping Materials and Handling

18
MULTI V Space II Installation Manual
Due to our policy of continuous product innovation, some specifications may change without notification.
©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
Piping Materials and Handling
GENERAL INSTALLATION GUIDELINES
Table 8: ACR Copper Tubing Dimensions and Physical Characteristics1-4
Nominal Pipe
Outside
Diameter (in)
Actual Outside
Diameter (in)
Drawn Temper Annealed Temper
Nominal Wall
Thickness (in) Weight (lb/ft) Cubic ft per Linear ft
Nominal Wall
Thickness (in) Weight (lb/ft) Cubic ft per Linear ft
1/4 0.250 -- -- -- 0.030 0.081 .00020
3/8 0.375 0.030 0.126 .00054 0.032 0.134 .00053
1/2 0.500 0.035 0.198 .00101 0.032 0.182 .00103
5/8 0.625 0.040 0.285 .00162 0.035 0.251 .00168
3/4 0.750 0.042 0.362 .00242 0.042 0.362 .00242
7/8 0.875 0.045 0.455 .00336 0.045 0.455 .00336
1-1/8 1.125 0.050 0.655 .00573 0.050 0.655 .00573
1All dimensions provided are in accordance with ASTM B280 – Standard.
2Design pressure = 551 psig.
3ACR Tubing is available as hard drawn or annealed (soft) and are suitable for use with R410A refrigerant.
4The Copper Tube Handbook, 2010, Copper Development Association Inc., 260 Madison Avenue, New York, NY 10016.
• Commercially available piping often contains dust and other materials. Always blow it clean with a dry inert gas.
• Prevent dust, water or other contaminants from entering the piping during installation.
Selecting Field-Supplied Copper Tubing
Copper is the only approved refrigerant pipe material for use with LG Multi V commercial air conditioning products, and LG recommends
seamless phosphorous deoxidized ACR type copper pipe, hard-drawn rigid type “K” or “L”, or annealed-tempered, copper pipe.
• Drawn temper (rigid) ACR copper tubing is available in sizes 3/8 through 2-1/8 inches (ASTM B 280, clean, dry, and capped).
• Annealed temper (soft) ACR copper tubing is available in sizes 1/4 through 2-1/8 inches (ASTM B 280, clean, dry, and capped).
Tube wall thickness should meet local code requirements and be approved for an operating pressure of 551 psi. If local code does not
specify wall thickness, LG suggests using tube thickness per table below. When bending tubing, try to keep the number of bends to a
minimum, and use the largest radii possible to reduce the equivalent length of installed pipe; also, bending radii greater than ten (10) pipe
diameters can minimize pressure drop. Be sure no traps or sags are present when rolling out soft copper tubing coils.
Table 9: ACR Copper Tubing Material.
Type Seamless Phosphorous Deoxidized
Class UNS C12200 DHP
Straight Lengths H58 Temper
Coils O60 Temper
OD (in) 1/4 3/8 1/2 5/8 3/4 7/8 1-1/8 1-3/8 1-5/8
Material Rigid Type “K” or “L” and Soft ACR Acceptable Rigid Type “K” or “L” Only
Min. Bend
Radius (in) .563 .9375 1.5 2.25 3.0 3.0 3.5 4.0 4.5
Min. Wall
Thickness (in) .03 .03 .035 .040 .042 .045 .050 .050 .050
Table 10: Piping Tube Thicknesses.

19
General Installation Guidelines
Due to our policy of continuous product innovation, some specifications may change without notification.
©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
LG Engineered Y-branch Kits and Header Kits
LG Y-branch and Header kits are highly engineered devices designed to evenly divide the flow of refrigerant, and are used to join one pipe
segment to two or more segments.
No Substitutions
Only LG supplied Y-branch and Header ttings (as referenced below; sold separately) can be used to join one pipe segment to two or more
segments. Third-party or eld-fabricated Tee’s, Y-ttings, Headers, or other branch ttings are not qualied for use with LG Multi V Space II
systems. The only eld-provided ttings allowed in a Multi V Space II piping system are 45° and 90° elbows.
Table 11: Y-Branches and Headers.
• If the diameter of the branch pipe segments differ from that of the designated refrigerant piping, trim the to the desired section using a pipe
cutter, and then use an adapter to connect.
• Always follow manufacturer’s guidelines on refrigerant piping restrictions such as maximum length, elevation difference, and diameters.
Failure to do so can result in reduced heating / cooling performance or equipment malfunction.
Y-branches Headers
4 branch 7 branch 10 branch
ARBLN01621 ARBLN07121 ARBL054 ARBL057 ARBL1010
ARBLN03321 ARBLN14521 ARBL104 ARBL107 ARBL2010
LG Y-branch kits consist of:
• Y-branches (liquid line, vapor lines).
• Reducer fittings as applicable.
• Molded clam-shell type insulation covers.
LG Header kits consist of:
• Two Headers (one liquid line, one vapor line).
• Reducer fittings as applicable.
• Molded clam-shell type insulation covers.
Y-branch Kits
LG supplied Y-branches must be used at each transition. Field-supplied “T”
fittings or “Y” branches are not acceptable. Each LG supplied Y-branch kit comes
with two (2) Y-branches for indoor units, step-down pipe reducers, and insulation
covers.
Y-branches may be installed in horizontal or vertical configurations. When
installed vertically, position the Y-branch so the straight-through leg is ±3° of
plumb. When installed horizontally, position the Y-branch so the take-off leg is lev-
el and shares the same horizontal plane as the straight-through leg ±10° rotation.
There is no limitation on the number of Y-branches that can be installed, but there
is a limitation on the number of indoor units connected to a single water source
unit.
Y-branches should always be installed with the single port facing the water-source
unit, the two-port end facing indoor units (Do not install Y-branches backwards as
shown in Figure 15.) Refrigerant flow cannot make U-turns through Y-branches.
The first Y-branch kit must be located at least three (3) feet from the outdoor unit.
Figure 12: Y-branch Connections.
Figure 13: Y-branch Installation Alignment Specication.
Vertical up conguration. Vertical down conguration.
Figure 14: Horizontal Conguration End View.
±10°
Horizontal Plane
±10°
Branch Leg
Straight-through Leg
Y-branch Inlet
To indoor unit
To indoor unit
To outdoor unit
To next branch
To indoor unit
Figure 15: Diagram of an Incorrect
Y-branch Installation.
Provide a minimum of 20 inches
between a Y-branch and any
other fittings or indoor unit piped
in series. It is recommended that
when a Y-branch is located in a
pipe chase or other concealed
space, access doors should be
provided for inspection access.
The equivalent pipe length of
each Y-branch (1.6′) must be
added to each pipe segment
entered into LATS piping design
software.
GENERAL INSTALLATION GUIDELINES
Piping Materials and Handling

20
MULTI V Space II Installation Manual
Due to our policy of continuous product innovation, some specifications may change without notification.
©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
GENERAL INSTALLATION GUIDELINES
Piping Materials and Handling
Figure 16: Y-branch Insulation and Pipe Detail.
Install Correctly
• Y-branches can be installed upstream between the Header and the water-source unit, but a Y-branch cannot be installed between a
header and an indoor unit.
• To avoid the potential of uneven refrigerant distribution through a header fitting, minimize the difference in equivalent pipe length
between the header fitting and each connected indoor unit.
Header kits are intended for use where multiple indoor units are in
the same vicinity and it would be better to “home-run” the run-out
pipes back to a centralized location. If connecting multiple indoor
units that are far apart, Y-branches may be more economical. See
page 34 for Header kit specifications and capacities.
Y-branches can be installed between the Header and the outdoor
unit, but a Y-branch cannot be installed between a Header and an
indoor unit. Headers must be installed in a horizontal and level po-
sition with the distribution ports of the fitting in the same horizontal
plane as the straight-through branch.
When connecting indoor units to a Header, always connect the unit
with the largest nominal capacity to the port closest to the outdoor
unit. Then install the next largest indoor unit to the next port, work-
ing down to the smallest indoor unit. Do not skip ports.
All indoor units must be mounted at an elevation below the Header fitting. All indoor units connected to a single Header fitting should be
located with an elevation difference between indoor units that does not exceed 49 feet. If indoor units are located at an elevation the same
as or above the Header fitting, do not use a Header. Instead, install a Y-branch fitting between the outdoor unit and the Header fitting, and
connect the elevated indoor unit to the Y-branch.
Header Insulation
Each Header kit comes with clam-shell type peel and stick insulation
jackets molded to fit the Header fittings—one for the liquid line and
one for the vapor line.
Header Kits
LG supplied insulation jacketLG supplied header
Field supplied copper pipe
Field supplied insulation
Field supplied copper pipe
Figure 17: Header Insulation and Pipe Detail.
Figure 18: Header Kit—Horizontal Rotation Limit (Must be Installed
Level with No Rotation).
Smaller IDUs
Connect IDUs
Largest IDU
Header Inlet
Header End View
+0.0
-0.0
Y-branch Insulation
Each Y-branch kit comes with clam-shell type peel-and-stick insulation jackets
molded to t the Y-branch ttings—one for the liquid line, one for the vapor line.
• Check the t of the Y-branch clam-shell insulation jacket after the Y-branch is
installed.
• Mark the pipe where the insulation jacket ends.
• Remove the jacket.
• Install eld-provided insulation on the three (3) pipes rst.
• Peel the adhesive glue protector slip and install the clam-shell jacket over the
tting.