LG LUU247HV Engineering Manual

LG LUU247HV Engineering Manual
DUCTED INDOOR UNITS
INSTALLATION MANUAL
High-Static Ducted Indoor Units
Built-In Ducted Indoor Units
ARNU073BGA4
ARNU283BRA4
ARNU363B8A4
ARNU073BHA4
ARNU093BGA4
ARNU363BRA4
ARNU423B8A4
ARNU093BHA4
ARNU123BGA4
ARNU423BRA4
ARNU483B8A4
ARNU123BHA4
ARNU073B3G4
ARNU153B3G4
ARNU153BGA4
ARNU483BRA4
ARNU763B8A4
ARNU153BHA4
ARNU093B3G4
ARNU183B4G4
ARNU183BGA4
ARNU543BRA4
ARNU963B8A4
ARNU183BHA4
ARNU123B3G4
ARNU243B4G4
ARNU243BGA4
ARNU243BHA4
ARNU283BGA4
ARNU363BGA4
ARNU423BGA4
Low-Static Ducted Indoor Units
Vertical Air Handler
Indoor Units
ARNU123NJA4
ARNU183NJA4
ARNU243NJA4
ARNU303NJA4
ARNU363NJA4
ARNU073L1G4
ARNU153L2G4
ARNU423NKA4
ARNU093L1G4
ARNU183L2G4
ARNU483NKA4
ARNU123L2G4
ARNU243L3G4
ARNU543NKA4
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.
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.
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. A summary of safety precautions begins on page 4.
For more technical materials such as submittals, engineering
databooks, and catalogs, visit www.lghvac.com.
IM_MultiV_Ducted_IDU_5_16
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.
TABLE OF CONTENTS
Safety Instructions..........................................................................4
Introduction.....................................................................................9
Unit Nomenclature........................................................................ 11
R410A Refrigerant........................................................................12
General Data................................................................................13
Overview............................................................................................. 46
Indoor Unit Communication Cable Connections�������������������������������� 47
Indoor Unit Power Cable Connections............................................... 50
DIP Switch Settings for Gen4 Equipment........................................... 52
High-Static Ducted BH Chassis.......................................................... 53
High-Static Ducted BG Chassis.......................................................... 55
High-Static Ducted BR Chassis.......................................................... 57
High-Static Ducted B8 Chassis.......................................................... 59
Low-Static Ducted L1 Chassis............................................................ 61
Low-Static Ducted L2/L3 Chassis....................................................... 63
Low-Static Built-In B3/B4 Chassis...................................................... 65
Vertical Air Handler NJ Chassis.......................................................... 67
Vertical Air Handler NK Chassis......................................................... 69
Optional Wall-Mounted Sensor and Controller���������������������������������� 71
Controls Setup..............................................................................72
Installation Checklist.....................................................................76
General Installation Guidelines.....................................................34
Installation....................................................................................35
Install Ducted IDU Chassis................................................................. 35
Indoor Unit Dimensions...................................................................... 36
Duct Connection Dimensions............................................................. 37
Maintenance Clearances.................................................................... 38
Piping Connections............................................................................. 39
Refrigerant Piping.........................................................................40
Condensate Piping.......................................................................44
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.
3
Installation Manual
Specifications − High-Static BH Chassis............................................ 13
Specifications − High-Static BG Chassis............................................ 14
Specifications − High-Static BG Chassis............................................ 15
Specifications − High-Static BR/B8 Chassis...................................... 16
Specifications − Low-Static B3/B4 Chassis........................................ 18
Specifications − Low-Static Ducted L1/L2/L3 Chassis���������������������� 19
Specifications − Vertical Air Handler NJ Chassis������������������������������� 20
Specifications − Vertical Air Handler NK Chassis������������������������������ 21
Electrical − High-Static BH/BG/BR/B8 Chassis��������������������������������� 22
Electrical − Low-Static Built-In B3/B4 Chassis���������������������������������� 23
Electrical − Low-Static Ducted L1/L2/L3 Chassis������������������������������ 24
Dimensions – High-Static Ducted BH Chassis���������������������������������� 25
Dimensions – High-Static Ducted BG Chassis���������������������������������� 26
Dimensions – High-Static Ducted BR Chassis���������������������������������� 27
Dimensions – High-Static Ducted B8 Chassis����������������������������������� 28
Dimensions – Built-In Low-Static Ducted B3/B4 Chassis������������������ 29
Dimensions – Low-Static Ducted L1/L2/L3 Chassis�������������������������� 30
Dimensions – Vertical Air Handler NJ Chassis���������������������������������� 31
Dimensions – Vertical Air Handler NK Chassis��������������������������������� 32
Refrigerant Piping Diagrams.............................................................. 33
Power and Control Wiring.............................................................46
SAFETY INSTRUCTIONS
The instructions below 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 below.
TABLE OF SYMBOLS
DANGER
This symbol indicates an imminently hazardous situation which, if not avoided, will result in death or
serious injury.
WARNING
This symbol indicates a potentially hazardous situation which, if not avoided, could result in death or
serious injury.
CAUTION
This symbol indicates a potentially hazardous situation which, if not avoided, may result in minor or
moderate injury.
Multi V Ducted Indoor Units
Note:
This symbol Indicates situations that may result in equipment or property damage accidents only.
This symbol indicates an action that should not be performed.
INSTALLATION
DANGER
Don’t use or store flammable gas or combustibles near the unit.
There is risk of fire, explosion, and physical injury or death.
WARNING
Do not install, remove, or re-install the unit by yourself
(end-user). Ask the dealer or an an LG trained service
provider to install the unit.
Improper installation by the user may result in water leakage, fire,
explosion, electric shock, physical injury or death.
For replacement of an installed unit, always contact an
LG trained service provider.
There is risk of fire, electric shock, explosion, and physical injury or death.
The outdoor unit is shipped with refrigerant and the service
valves closed. Do not open service valves on the unit until
all non-condensibles have been removed from the piping
system and authorization has been obtained from the commissioning agent.
There is a risk of physical injury or death.
Do not run the compressor with the service valves
closed.
There is risk of explosion, physical injury, or death.
Periodically check that the outdoor unit is not damaged.
There is risk of explosion, physical injury, or death.
Replace all control box and panel covers.
If cover panels are not installed securely, dust, water and animals may
enter the unit, causing fire, electric shock, and physical injury or death.
Always check for system refrigerant leaks after the unit has
been installed or serviced.
Exposure to high concentration levels of refrigerant gas may lead to
illness or death.
4
Do not install the unit using defective hanging, attaching,
or mounting hardware.
There is risk of physical injury or death.
Wear protective gloves when handling equipment.
Sharp edges may cause personal injury.
Dispose of 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.
Do not install the unit in any location exposed to open
flame or extreme heat. Do not touch the unit with wet hands.
There is risk of fire, electric shock, explosion, and physical injury or death.
Install the unit considering the potential for earthquakes.
Improper installation may cause the unit to fall, resulting in physical
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
specified by LG are used, there is risk of fire, electric shock, explosion,
and 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
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
INSTALLATION – CONTINUED
injuries or death from oxygen depletion.
CAUTION
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 at a minimum of four points to avoid slippage from rigging apparatus.
• Failure to follow these directions may result in minor or moderate physical injury.
Note:
Properly insulate all cold surfaces to prevent “sweating.”
When installing the unit in a hospital, mechanical room, or
similar electromagnetic field (EMF) sensitive environment,
provide sufficient protection against electrical noise.
Inverter equipment, power generators, high-frequency medical equipment, 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. This 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 become damaged.
Do not install the unit in a noise sensitive area.
When connecting refrigerant tubing, remember to allow for
pipe expansion.
Install the unit in a safe location where no one can step on or
fall onto it.
Do not install the unit with defective hanging,
attaching, or mounting hardware.
There is risk of unit and property damage.
Install the drain hose to ensure adequate drainage.
There is a risk of water leakage and property damage.
Don’t store or use flammable gas/combustibles near the
unit.
There is risk of product failure.
Always check for system refrigerant leaks after the unit has
been installed or serviced.
Low refrigerant levels may cause product failure
The unit is shipped with refrigerant and the service valves
closed.
Do not open service valves on the unit until all
non-condensibles have been removed from the piping system and authorization to do so has been obtained from the
com-missioning agent.
There is a risk of refrigerant contamination, refrigerant loss and equipment damage.
Improper piping may cause refrigerant leaks and system malfunction.
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.
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.
5
Installation Manual
Cold surfaces such as uninsulated pipe can generate condensate that
may drip and cause a slippery floor condition and/or water damage to
walls.
Periodically check that the outdoor unit is not damaged.
There is a risk of equipment damage.
SAFETY INSTRUCTIONS
WIRING
DANGER
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.
Multi V Ducted Indoor Units
WARNING
The information contained in this manual is intended for use
by an industry-qualified, experienced, trained 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.
Ensure the unit is connected to a dedicated power source
that provides adequate power.
If the power source capacity is inadequate or the electric work is not performed properly, it may result in fire, electric shock, physical injury or death.
Turn the power off at the nearest disconnect before servicing
the equipment.
Electric shock can cause physical injury or death.
Properly size all circuit breakers or fuses.
There is risk of fire, electric shock, explosion, physical injury or death.
Refer to local, state, and federal codes, and use power wires
of sufficient current capacity and rating.
Wires that are too small may generate heat and cause a fire.
Secure all field 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 fire and
physical injury or death.
Properly tighten all power connections.
Loose wiring may overheat at connection points, causing a fire, physical
injury or death.
Note:
Do not cut, lengthen or shorten the communications and
power cable between any dry contact unit and its connected
indoor unit. Do not install the unit in a location where the communications and power cable cannot be safely and easily connected between the two units. Do not allow strain on this cable.
Poor cable connections can cause equipment malfunction.
6
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.
OPERATION
DANGER
Do not provide power to or operate the unit if it is flooded
or submerged.
There is risk of fire, electric shock, physical injury or death.
Use a dedicated power source for this product.
There is risk of fire, electric shock, physical injury or death.
Do not operate the disconnect switch with wet hands.
There is risk of fire, electric shock, physical injury or death.
WARNING
Do not allow water, dirt, or animals to enter the unit.
There is risk of unit failure, fire, electric shock, physical injury or death.
Inadequate ventilation is a health hazard.
Do not touch 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 fingers and clothing away from
moving parts.
The rotating, hot, cold, and high-voltage parts of the unit can cause
physical injury or death.
Periodically check power cable and connection for damage.
Cable must be replaced by the manufacturer, its service agent, or similar
qualified persons in order to avoid physical injury and/or electric shock.
If the unit falls from its installed location, it can cause property damage,
product failure, physical injury or death.
If refrigerant gas leaks out, ventilate the area before operating the unit.
If the unit is mounted in an enclosed, low-lying, or poorly ventilated area
and the system develops a refrigerant leak, it may cause fire, electric
shock, explosion, physical injury or death.
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 when the unit is powered. Do not touch the electrostatic filter, if the unit includes one. The unit contains sharp,
rotating, hot, and high voltage parts that can cause personal
injury and/or electric shock.
Installation Manual
Avoid excessive cooling and periodically perform ventilation
to the unit.
Periodically verify the hanging bolts and other hardware
securing the unit have not deteriorated.
Ensure no power is connected to the unit other than as
directed in this manual. Remove power from the unit before
removing or servicing the unit.
There is risk of unit failure, fire, electric shock, physical injury or death.
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
filter, if the unit includes one.
The unit contains sharp, rotating, hot, and high voltage parts that can
cause personal injury and/or electric shock.
Securely attach the electrical cover to the unit.
Non-secured electrical covers can result in burns or electric shock due to
dust or water in the service panel.
CAUTION
To avoid physical injury, use caution when cleaning or
servicing the air conditioner.
Note:
Clean up the site after installation is finished, and check
that no metal scraps, screws, or bits of wiring have been left
inside or surrounding the unit.
Do not use this equipment in mission critical or specialpurpose applications such as preserving foods, works of art,
wine coolers or refrigeration. This equipment is designed to
provide comfort cooling and heating.
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.
Securely attach the electrical cover to the indoor unit. Nonsecured covers can result in fire due to dust or water in the
service panel.
Periodically verify the equipment mounts have not deteriorated.
If the base collapses, the unit could fall and cause property damage or
product failure.
Do not allow water, dirt, or animals to enter the unit.
There is risk of unit failure.
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.
7
Multi V Ducted Indoor Units
8
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.
INTRODUCTION
Ducted Indoor Units
This manual describes how to install LG ducted indoor units (IDU)
for Multi V Variable Refrigerant Flow (VRF) heat pump and heat
recovery systems. Table 1 lists the available models. Refer to LG’s
Multi V Indoor Unit Engineering Manual for complete detailed
engineering data and selection procedures.
Figure 1: High-Static Ducted, BG/BR/B8/BH Chassis
Safety
Safety of personnel is the primary concern during all procedures.
Read and understand the safety summary at the front of this manual.
Read and understand this installation procedure before beginning
installation. Use the appropriate tools and accessories during installation. Plan your work and do not work alone, if possible. Know how
to obtain emergency medical and fire fighting assistance.
Figure 2: Built-In Ducted, B3/B4 Chassis
Installation Manual
Installation Personnel
This equipment is intended for installation by personnel trained
in the required construction, mechanical, electrical, and/or other
disciplines.
Applicable Codes
Personnel must be familiar with and follow the applicable national,
state, and/or local codes.
WARNING
Installation work must be performed by trained personnel and in accordance with national wiring standards and all local or other applicable
codes. Improper installation can result in fire, electric shock, physical
injury, or death.
Figure 3: Low-Static Ducted, L1/L2/L3 Chassis
Note:
Please read all instructions before installing this product. Become familiar
with the unit, its components and connections, and the order of installation. Incorrect installation can degrade or prevent proper operation.
Required Tools (field provided)
•
•
•
•
•
•
•
Level
Screwdriver
Electrical lineman pliers
Electric drill
Holesaw
Drill
Flaring tool set
•
•
•
•
•
•
Figure 4: Vertical Air Handler NJ/NK Chassis
Tubing cutter
Tube/pipe reamer
Torque wrenches
Allen wrench
Gas-leak detector
Thermometer
Required Parts (field provided)
•
•
•
•
•
•
Pipes - vapor line and liquid line, with insulation
3/8” or 1/2” nuts, flat washers, and lock/split washers
3/8” or 1/2” threaded hanger rods
Insulated drain hose
Additional drain hose
Connecting cable (power and control)
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.
9
INTRODUCTION
Table 1: Multi V Ducted Indoor Units
Unit
Model Numbers
High-Static Ducted BG/BR/B8
ARNU073BGA4
ARNU283BRA4
ARNU363B8A4
ARNU073BHA4
ARNU093BGA4
ARNU363BRA4
ARNU423B8A4
ARNU093BHA4
ARNU123BGA4
ARNU423BRA4
ARNU483B8A4
ARNU123BHA4
ARNU153BGA4
ARNU483BRA4
ARNU763B8A4
ARNU153BHA4
ARNU183BGA4
ARNU543BRA4
ARNU963B8A4
ARNU183BHA4
ARNU243BGA4
ARNU243BHA4
ARNU283BGA4
Multi V Ducted Indoor Units
ARNU363BGA4
ARNU423BGA4
Built-In Ducted B3/B4
ARNU073B3G4
ARNU093B3G4
ARNU123B3G4
ARNU153B3G4
ARNU183B4G4
(shown with optional canvas boot and grill)
Low-Static Ducted L1/L2/L3
ARNU243B4G4
ARNU073L1G4
ARNU093L1G4
ARNU123L2G4
ARNU153L2G4
ARNU183L2G4
ARNU243L3G4
Vertical Air Handler
ARNU123NJA4
ARNU183NJA4
ARNU243NJA4
ARNU303NJA4
ARNU633NJA4
ARNU423NKA4
ARNU483NKA4
ARNU543NKA4
10
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 NOMENCLATURE
Cassette Indoor Units Nomenclature
ARN
U
07
3
BG
A
4
Family
ARN = Multi V Indoor Unit (Refrigerant R410A)
Type
U = Inverter Heat Pump/Heat Recovery
42 = 42,000
48 = 48,000
54 = 54,000
76 = 76,000
96 = 96,000
Installation Manual
Nominal Capacity
(Nominal cooling capacity in Btu/h)
07 = 7,500
18 = 19,100
09 = 9,600
24 = 24,200
12 = 12,300
28 = 28,000
15 = 15,400
36 = 36,200
Electrical Ratings
3 = 208–230V/60Hz/1Phase
Chassis/Model Type
BG = High-Static Ducted
BR = High-Static Ducted
B8 = High-Static Ducted
B3 = Built-In Ducted
B4 = Built-In Ducted
BH = Built-In Ducted
L1 = Low-Static Ducted
L2 = Low-Static Ducted
L3 = Low-Static Ducted
NJ = Vertical Air Handler
NK = Vertical Air Handler
Feature
C = Plasma Filter
A = No Plasma Filter
G = Low-Static
Generation
4 = Fourth
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.
11
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.
WARNING
• Do not place the refrigerant cylinder in direct sunlight. Refrigerant cylinder may explode causing severe injury or death.
Note:
Multi V Ducted Indoor Units
• Because R410A is a combination of R32 and R125, the required additional refrigerant must be charged in its liquid state. If the
refrigerant is charged in its gaseous state, its composition changes and the system will not work properly.
• Do not heat piping more than necessary during installation. Piping may become soft and fail when pressurized.
• Do not use any piping that has not been approved for use in high-pressure refrigerant systems. Piping wall thickness must comply
with the applicable local, state, and federal codes for the 551 psi design pressure of R410A. Inadequate piping may fail when
pressurized.
12
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 DATA
Specifications − High-Static BH Chassis
Table 2: High-Static Ducted BH Chassis IDU Specifications
Model No.
Cooling Mode Performance
Capacity (Btu/h)
Power Input1 (W)
Heating Mode Performance
ARNU073BHA4
ARNU093BHA4
ARNU123BHA4
ARNU153BHA4
ARNU183BHA4
ARNU243BHA4
7,500
150
9,600
150
12,300
150
15,400
150
19,100
150
24,200
150
Capacity (Btu/h)
8,500
10,900
13,600
17,100
21,500
27,300
Power Input1 (W)
150
150
150
150
150
150
Cooling Max. (°F WB)
76
76
76
76
76
76
Heating Min. (°F DB)
59
59
59
59
59
59
Entering Mixed Air
Unit Data
Refrigerant Type2
R410A
R410A
R410A
R410A
R410A
EEV
EEV
EEV
EEV
EEV
EEV
Net Unit Weight (lbs.)
58.4
58.4
58.4
58.4
58.4
58.4
68.3
68.3
68.3
68.3
68.3
68.3
2 x 18
2 x 18
2 x 18
2 x 18
2 x 18
2 x 18
Type
Sirocco
Sirocco
Sirocco
Sirocco
Sirocco
Sirocco
Motor
1
1
1
1
1
1
Housing
2
2
2
2
2
2
Shipping Weight (lbs.)
Communication Cable (No. x AWG)
4
Fan
Motor/Drive
Airflow Rate H/M/L (CFM)
Standard Mode
Airflow Rate H/M/L (CFM)
High Mode (Factory Set)
External Static Pressure (in. wg)
Standard Mode
External Static Pressure (in. wg)
High Mode (Factory Set)
Piping
Brushless Digitally Controlled / Direct
258 / 222 / 198
258 / 222 / 198
307 / 258 / 198
388 / 357 / 307
466 / 413 / 258
618 / 519 / 445
230 / 205 / 191
286 / 230 / 205
339 / 286 / 230
399 / 339 / 230
459 / 399 / 339
565 / 509 / 459
0.23
0.23
0.23
0.23
0.23
0.23
0.31
0.31
0.31
0.31
0.31
0.31
Liquid Line (in., O.D.)
1/4 Flare
1/4 Flare
1/4 Flare
1/4 Flare
1/4 Flare
3/8 Flare
Vapor Line (in., O.D.)
1/2 Flare
1/2 Flare
1/2 Flare
1/2 Flare
1/2 Flare
5/8 Flare
1
1
1
1
1
1
Condensate Line (in., I.D.)
Power Input is rated at high speed.
Take appropriate actions at the end of HVAC equipment life to recover, recycle, reclaim or
destroy R410A refrigerant according to applicable regulations (40 CFR Part 82, Subpart F)
under section 608 of CAA.
3
All communication cable to be minimum 18 AWG, 2-conductor, stranded, shielded and
must comply with applicable local and national codes. Ensure the communication cable
is properly grounded at the master outdoor unit only. Do not ground the ODU−IDU communications cable at any other point.
EEV: Electronic Expansion Valve
Power wiring is field supplied and must comply with the applicable local and national
codes. Power Supply (V/Hz/Ø): 208-230/60/1
1
2
This unit comes with a dry nitrogen charge.
This data 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%.
Cooling capacity rating obtained with air entering the indoor coil at 80ºF dry bulb (DB) and
67ºF wet bulb (WB) and outdoor ambient conditions of 95ºF dry bulb (DB).
Heating capacity rating obtained with air entering the indoor unit at 70ºF dry bulb (DB) and
outdoor ambient conditions of 47ºF dry bulb (DB) and 43ºF wet bulb (WB).
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.
13
Installation Manual
R410A
Refrigerant Control
GENERAL DATA
Specifications − High-Static BG Chassis
Table 3: High-Static BG Chassis IDU Specifications
Model No.
Cooling Mode Performance
Capacity (Btu/h)
Power Input1 (W)
Heating Mode Performance
ARNU073BGA4
ARNU093BGA4
ARNU123BGA4
ARNU153BGA4
ARNU183BGA4
7,500
450
9,600
450
12,300
450
15,400
450
19,100
450
Capacity (Btu/h)
8,500
10,900
13,600
17,100
21,500
Power Input (W)
450
450
450
450
450
Cooling Max. (°F WB)
76
76
76
76
76
Heating Min. (°F DB)
59
59
59
59
59
R410A
R410A
R410A
R410A
R410A
Refrigerant Control
EEV
EEV
EEV
EEV
EEV
Net Unit Weight (lbs.)
83.8
83.8
83.8
83.8
83.8
94.8
94.8
94.8
94.8
94.8
2 x 18
2 x 18
2 x 18
2 x 18
2 x 18
Type
Sirocco
Sirocco
Sirocco
Sirocco
Sirocco
Motor
1
1
1
1
1
Housing
2
2
2
2
2
1
Entering Mixed Air
Unit Data
Multi V Ducted Indoor Units
Refrigerant Type2
Shipping Weight (lbs.)
Communication Cable (No. x AWG)
4
Fan
Motor/Drive
Airflow Rate H/M/L (CFM)
Standard Mode
Airflow Rate H/M/L (CFM)
High Mode (Factory Set)
External Static Pressure (in. wg)
Standard Mode
External Static Pressure (in. wg)
High Mode (Factory Set)
Piping
Brushless Digitally Controlled / Direct
516 / 484 / 434
533 / 484 / 434
586 / 533 / 484
477 / 427 / 318
547 / 470 / 427
441 / 406 / 332
452 / 406 / 332
477 / 427 / 332
487 / 417 / 293
537 / 487 / 417
0.15
0.15
0.15
0.23
0.23
0.23
0.23
0.23
0.31
0.31
Liquid Line (in., O.D.)
3/8 Flare
3/8 Flare
3/8 Flare
3/8 Flare
3/8 Flare
Vapor Line (in., O.D.)
5/8 Flare
5/8 Flare
5/8 Flare
5/8 Flare
5/8 Flare
1
1
1
1
1
Condensate Line (in., I.D.)
Power Input is rated at high speed.
Take appropriate actions at the end of HVAC equipment life to recover, recycle, reclaim or
destroy R410A refrigerant according to applicable regulations (40 CFR Part 82, Subpart F)
under section 608 of CAA.
3
All communication cable to be minimum 18 AWG, 2-conductor, stranded, shielded and
must comply with applicable local and national codes. Ensure the communication cable
is properly grounded at the master outdoor unit only. Do not ground the ODU−IDU communications cable at any other point.
EEV: Electronic Expansion Valve
Power wiring is field supplied and must comply with the applicable local and national
codes. Power Supply (V/Hz/Ø): 208-230/60/1
1
2
14
This unit comes with a dry nitrogen charge.
This data 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%.
Cooling capacity rating obtained with air entering the indoor coil at 80ºF dry bulb (DB) and
67ºF wet bulb (WB) and outdoor ambient conditions of 95ºF dry bulb (DB).
Heating capacity rating obtained with air entering the indoor unit at 70ºF dry bulb (DB) and
outdoor ambient conditions of 47ºF dry bulb (DB) and 43ºF wet bulb (WB).
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 DATA
Specifications − High-Static BG Chassis
Table 2: High-Static BG Chassis IDU Specifications – continued
Model No.
Cooling Mode Performance
Capacity (Btu/h)
Power Input1 (W)
Heating Mode Performance
ARNU243BGA4
ARNU283BGA4
ARNU363BGA4
ARNU423BGA4
24,200
450
28,000
450
36,200
450
42,000
450
Capacity (Btu/h)
27,300
31,500
40,600
43,800
Power Input1 (W)
450
450
450
450
Cooling Max. (°F WB)
76
76
76
76
Heating Min. (°F DB)
59
59
59
59
Entering Mixed Air
Unit Data
Refrigerant Type2
R410A
R410A
R410A
EEV
EEV
EEV
EEV
Net Unit Weight (lbs.)
83.8
83.8
83.8
83.8
94.8
94.8
94.8
94.8
2 x 18
2 x 18
2 x 18
2 x 18
Type
Sirocco
Sirocco
Sirocco
Sirocco
Motor
1
1
1
1
Housing
2
2
2
2
Shipping Weight (lbs.)
Communication Cable (No. x AWG)
4
Installation Manual
R410A
Refrigerant Control
Fan
Motor/Drive
Airflow Rate H/M/L (CFM)
Standard Mode
Airflow Rate H/M/L (CFM)
High Mode (Factory Set)
External Static Pressure (in. wg)
Standard Mode
External Static Pressure (in. wg)
High Mode (Factory Set)
Piping
Brushless Digitally Controlled / Direct
671 / 576 / 547
893 / 770 / 622
1,003 / 894 / 770
1,130 / 1,003 / 961
671 / 537 / 487
915 / 851 / 770
1,141 / 1,024 / 894
1,218 / 1,141 / 1,084
0.23
0.31
0.31
0.31
0.31
0.39
0.39
0.39
Liquid Line (in., O.D.)
3/8 Flare
3/8 Flare
3/8 Flare
3/8 Flare
Vapor Line (in., O.D.)
5/8 Flare
5/8 Flare
5/8 Flare
5/8 Flare
1
1
1
1
Condensate Line (in., I.D.)
Power Input is rated at high speed.
Take appropriate actions at the end of HVAC equipment life to recover, recycle, reclaim or
destroy R410A refrigerant according to applicable regulations (40 CFR Part 82, Subpart F)
under section 608 of CAA.
3
All communication cable to be minimum 18 AWG, 2-conductor, stranded, shielded and
must comply with applicable local and national codes. Ensure the communication cable
is properly grounded at the master outdoor unit only. Do not ground the ODU−IDU communications cable at any other point.
EEV: Electronic Expansion Valve
Power wiring is field supplied and must comply with the applicable local and national
codes. Power Supply (V/Hz/Ø): 208-230/60/1
1
2
This unit comes with a dry nitrogen charge.
This data 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%.
Cooling capacity rating obtained with air entering the indoor coil at 80ºF dry bulb (DB) and
67ºF wet bulb (WB) and outdoor ambient conditions of 95ºF dry bulb (DB).
Heating capacity rating obtained with air entering the indoor unit at 70ºF dry bulb (DB) and
outdoor ambient conditions of 47ºF dry bulb (DB) and 43ºF wet bulb (WB).
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.
15
GENERAL DATA
Specifications − High-Static BR/B8 Chassis
Table 4: High-Static BR Chassis IDU Specifications
Model No.
Cooling Mode Performance
Capacity (Btu/h)
Power Input1 (W)
Heating Mode Performance
ARNU283BRA4
ARNU363BRA4
ARNU5423BRA4
ARNU483BRA4
ARNU543BRA4
28,000
450
36,200
450
42,000
450
48,100
450
54,000
450
Capacity (Btu/h)
31,500
40,600
43,800
51,200
61,400
Power Input1 (W)
450
450
450
450
450
Cooling Max. (°F WB)
76
76
76
76
76
Heating Min. (°F DB)
59
59
59
59
59
Entering Mixed Air
Unit Data
Multi V Ducted Indoor Units
Refrigerant Type2
R410A
R410A
R410A
R410A
R410A
Refrigerant Control
EEV
EEV
EEV
EEV
EEV
Net Unit Weight (lbs.)
112
112
112
112
112
132
132
132
132
132
2 x 18
2 x 18
2 x 18
2 x 18
2 x 18
Type
Sirocco
Sirocco
Sirocco
Sirocco
Sirocco
Motor
2
2
2
2
2
Housing
2
2
2
2
2
Shipping Weight (lbs.)
Communication Cable (No. x AWG)
4
Fan
Motor/Drive
Airflow Rate H/M/L (CFM)
Standard Mode
Airflow Rate H/M/L (CFM)
High Mode (Factory Set)
External Static Pressure (in. wg)
Standard Mode
External Static Pressure (in. wg)
High Mode (Factory Set)
Piping
Brushless Digitally Controlled / Direct
1,151 / 1,105 / 1,074 1,430 / 1,151 / 1,105 1,497 / 1,430 / 1,151 1,568/1,395/1,183
1,819/1,678/1,395
1,278 / 1,134 / 1,007 1,381 / 1,176 / 1,049 1,490 / 1,381 / 1,176
1,582/1,434/1,176
1,801/1,582/1,434
0.39
0.39
0.39
0.39
0.39
0.55
0.55
0.55
0.55
0.55
Liquid Line (in., O.D.)
3/8 Flare
3/8 Flare
3/8 Flare
3/8 Flare
3/8 Flare
Vapor Line (in., O.D.)
5/8 Flare
5/8 Flare
5/8 Flare
5/8 Flare
5/8 Flare
1
1
1
1
1
Condensate Line (in., I.D.)
Power Input is rated at high speed.
Take appropriate actions at the end of HVAC equipment life to recover, recycle, reclaim or
destroy R410A refrigerant according to applicable regulations (40 CFR Part 82, Subpart F)
under section 608 of CAA.
3
All communication cable to be minimum 18 AWG, 2-conductor, stranded, shielded and
must comply with applicable local and national codes. Ensure the communication cable
is properly grounded at the master outdoor unit only. Do not ground the ODU−IDU communications cable at any other point.
EEV: Electronic Expansion Valve
Power wiring is field supplied and must comply with the applicable local and national
codes. Power Supply (V/Hz/Ø): 208-230/60/1
1
2
16
This unit comes with a dry nitrogen charge.
This data 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%.
Cooling capacity rating obtained with air entering the indoor coil at 80ºF dry bulb (DB) and
67ºF wet bulb (WB) and outdoor ambient conditions of 95ºF dry bulb (DB).
Heating capacity rating obtained with air entering the indoor unit at 70ºF dry bulb (DB) and
outdoor ambient conditions of 47ºF dry bulb (DB) and 43ºF wet bulb (WB).
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.
Table 5: High-Static B8 Chassis IDU Specifications
Model No.
Cooling Mode Performance
Capacity (Btu/h)
Power Input1 (W)
Heating Mode Performance
ARNU363B8A4
ARNU423B8A4
ARNU483B8A4
ARNU763B8A4
ARNU963B8A4
36,200
800
42,000
800
48,100
800
76,400
800
95,900
800
Capacity (Btu/h)
40,600
43,800
51,200
86,000
107,500
Power Input1 (W)
800
800
800
800
800
Cooling Max. (°F WB)
76
76
76
76
76
Heating Min. (°F DB)
59
59
59
59
59
Entering Mixed Air
Unit Data
Refrigerant Type2
R410A
R410A
R410A
R410A
EEV
EEV
EEV
EEV
EEV
Net Unit Weight (lbs.)
192
192
192
192
192
222
222
222
222
222
2 x 18
2 x 18
2 x 18
2 x 18
2 x 18
Type
Sirocco
Sirocco
Sirocco
Sirocco
Sirocco
Motor
2
2
2
2
2
Housing
2
2
2
2
2
Shipping Weight (lbs.)
Communication Cable (No. x AWG)
4
Fan
Motor/Drive
Airflow Rate H/M/L (CFM)
Standard Mode
Airflow Rate H/M/L (CFM)
High Mode (Factory Set)
External Static Pressure (in. wg)
Standard Mode
External Static Pressure (in. wg)
High Mode (Factory Set)
Piping
Brushless Digitally Controlled / Direct
1,896 / 1,748 / 1,550 1,963 / 1,786 / 1,589 2,048 / 1,846 / 1,670 2,050 / 1,766 / 1,766 2,684 / 2,260 / 2,260
1,730 / 1,317 / 1,066 1,914 / 1,458 / 1,123 2,019 / 1,518 / 1,200 2,260 / 1,766 / 1,766 2,542 / 2,260 / 2,260
0.35
0.35
0.35
0.59
0.59
0.70
0.70
0.70
0.87
0.87
Liquid Line (in., O.D.)
3/8 Flare
3/8 Flare
3/8 Flare
3/8 Flare
3/8 Flare
Vapor Line (in., O.D.)
3/4 Brazed
3/4 Brazed
3/4 Brazed
3/4 Flare
7/8 Flare
1
1
1
1
1
Condensate Line (in., I.D.)
Power Input is rated at high speed.
Take appropriate actions at the end of HVAC equipment life to recover, recycle, reclaim or
destroy R410A refrigerant according to applicable regulations (40 CFR Part 82, Subpart F)
under section 608 of CAA.
3
All communication cable to be minimum 18 AWG, 2-conductor, stranded, shielded and
must comply with applicable local and national codes. Ensure the communication cable
is properly grounded at the master outdoor unit only. Do not ground the ODU−IDU communications cable at any other point.
EEV: Electronic Expansion Valve
Power wiring is field supplied and must comply with the applicable local and national
codes. Power Supply (V/Hz/Ø): 208-230/60/1
1
2
This unit comes with a dry nitrogen charge.
This data 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%.
Cooling capacity rating obtained with air entering the indoor coil at 80ºF dry bulb (DB) and
67ºF wet bulb (WB) and outdoor ambient conditions of 95ºF dry bulb (DB).
Heating capacity rating obtained with air entering the indoor unit at 70ºF dry bulb (DB) and
outdoor ambient conditions of 47ºF dry bulb (DB) and 43ºF wet bulb (WB).
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.
17
Installation Manual
R410A
Refrigerant Control
GENERAL DATA
Specifications − Low-Static B3/B4 Chassis
Table 6: Low-Static Built-In B3/B4 Chassis IDU Specifications
Model No.
Cooling Mode Performance
Capacity (Btu/h)
Power Input1 (W)
Heating Mode Performance
ARNU073B3G4 ARNU093B3G4 ARNU123B3G4 ARNU153B3G4 ARNU183B4G4 ARNU243B4G4
7,500
85
9,600
85
12,300
85
15,400
85
19,100
85
24,200
115
Capacity (Btu/h)
8,500
10,900
13,600
17,100
21,500
27,300
Power Input (W)
85
85
85
85
85
115
Cooling Max. (°F WB)
76
76
76
76
76
76
Heating Min. (°F DB)
59
59
59
59
59
59
1
Entering Mixed Air
Unit Data
Multi V Ducted Indoor Units
Refrigerant Type2
R410A
R410A
R410A
R410A
R410A
R410A
Refrigerant Control
EEV
EEV
EEV
EEV
EEV
EEV
Net Unit Weight (lbs.)
46.3
46.3
46.3
46.3
57.3
57.3
53.3
53.3
53.3
53.3
67.2
67.2
2 x 18
2 x 18
2 x 18
2 x 18
2 x 18
2 x 18
Type
Sirocco
Sirocco
Sirocco
Sirocco
Sirocco
Sirocco
Motor
2
2
2
2
2
2
Housing
3
3
3
3
4
4
Shipping Weight (lbs.)
Communication Cable (No. x AWG)
4
Fan
Motor/Drive
Airflow Rate H/M/L (CFM)
Standard Mode
Airflow Rate H/M/L (CFM)
High Mode (Factory Set)
External Static Pressure (in. wg)
Standard Mode
External Static Pressure (in. wg)
High Mode (Factory Set)
Piping
Brushless Digitally Controlled / Direct
283 / 229 / 194
318 / 247 / 212
353 / 283 / 229
388 / 353 / 283
494 / 424 / 353
600 / 530 / 353
283 / 229 / 194
318 / 247 / 212
353 / 283 / 229
388 / 353 / 283
494 / 424 / 353
600 / 530 / 353
0
0
0
0
0
0
0.08
0.08
0.08
0.08
0.08
0.08
Liquid Line (in., O.D.)
1/4 Flare
1/4 Flare
1/4 Flare
1/4 Flare
1/4 Flare
3/8 Flare
Vapor Line (in., O.D.)
1/2 Flare
1/2 Flare
1/2 Flare
1/2 Flare
1/2 Flare
5/8 Flare
1
1
1
1
1
1
Condensate Line (in., I.D.)
Power Input is rated at high speed.
Take appropriate actions at the end of HVAC equipment life to recover, recycle, reclaim or
destroy R410A refrigerant according to applicable regulations (40 CFR Part 82, Subpart F)
under section 608 of CAA.
3
All communication cable to be minimum 18 AWG, 2-conductor, stranded, shielded and
must comply with applicable local and national codes. Ensure the communication cable
is properly grounded at the master outdoor unit only. Do not ground the ODU−IDU communications cable at any other point.
EEV: Electronic Expansion Valve
Power wiring is field supplied and must comply with the applicable local and national
codes. Power Supply (V/Hz/Ø): 208-230/60/1
1
2
18
This unit comes with a dry nitrogen charge.
This data 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%.
Cooling capacity rating obtained with air entering the indoor coil at 80ºF dry bulb (DB) and
67ºF wet bulb (WB) and outdoor ambient conditions of 95ºF dry bulb (DB).
Heating capacity rating obtained with air entering the indoor unit at 70ºF dry bulb (DB) and
outdoor ambient conditions of 47ºF dry bulb (DB) and 43ºF wet bulb (WB).
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 DATA
Specifications − Low-Static Ducted L1/L2/L3 Chassis
Table 7: Low-Static Ducted L1/L2/L3 Chassis IDU Specifications
Model No.
Cooling Mode Performance
Capacity (Btu/h)
Power Input1 (W)
Heating Mode Performance
ARNU073L1G4 ARNU093L1G4 ARNU123L2G4 ARNU153L2G4 ARNU183L2G4 ARNU243L3G4
7,500
40
9,600
40
12,300
85
15,400
85
19,100
85
24,000
115
Capacity (Btu/h)
8,500
10,900
13,600
17,100
21,500
27,300
Power Input1 (W)
40
40
85
85
85
115
Cooling Max. (°F WB)
76
76
76
76
76
76
Heating Min. (°F DB)
59
59
59
59
59
59
Entering Mixed Air
Unit Data
Refrigerant Type2
R410A
R410A
R410A
R410A
R410A
EEV
EEV
EEV
EEV
EEV
EEV
Net Unit Weight (lbs.)
38.6
38.6
50.7
50.7
50.7
59.5
47.4
47.4
60.6
60.6
60.6
68.3
2 x 18
2 x 18
2 x 18
2 x 18
2 x 18
2 x 18
Type
Sirocco
Sirocco
Sirocco
Sirocco
Sirocco
Sirocco
Motor
1
1
2
2
2
2
Housing
2
2
3
3
3
4
Shipping Weight (lbs.)
Communication Cable (No. x AWG)
4
Fan
Motor/Drive
Airflow Rate H/M/L (CFM)
Standard Mode
Airflow Rate H/M/L (CFM)
High Mode (Factory Set)
External Static Pressure (in. wg)
Standard Mode
External Static Pressure (in. wg)
High Mode (Factory Set)
Piping
Brushless Digitally Controlled / Direct
270 / 230 / 200
320 / 250 / 200
360 / 310 / 250
450 / 360 / 310
530 / 450 / 360
710 / 570 / 430
270 / 230 / 200
320 / 250 / 200
360 / 310 / 250
450 / 360 / 310
530 / 450 / 360
710 / 570 / 430
0
0
0
0
0
0
0.1
0.1
0.1
0.1
0.1
0.1
Liquid Line (in., O.D.)
1/4 Flare
1/4 Flare
1/4 Flare
1/4 Flare
1/4 Flare
3/8 Flare
Vapor Line (in., O.D.)
1/2 Flare
1/2 Flare
1/2 Flare
1/2 Flare
1/2 Flare
5/8 Flare
1
1
1
1
1
1
Condensate Line (in., I.D.)
Power Input is rated at high speed.
Take appropriate actions at the end of HVAC equipment life to recover, recycle, reclaim or
destroy R410A refrigerant according to applicable regulations (40 CFR Part 82, Subpart F)
under section 608 of CAA.
3
All communication cable to be minimum 18 AWG, 2-conductor, stranded, shielded and
must comply with applicable local and national codes. Ensure the communication cable
is properly grounded at the master outdoor unit only. Do not ground the ODU−IDU communications cable at any other point.
EEV: Electronic Expansion Valve
Power wiring is field supplied and must comply with the applicable local and national
codes. Power Supply (V/Hz/Ø): 208-230/60/1
1
2
This unit comes with a dry nitrogen charge.
This data 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%.
Cooling capacity rating obtained with air entering the indoor coil at 80ºF dry bulb (DB) and
67ºF wet bulb (WB) and outdoor ambient conditions of 95ºF dry bulb (DB).
Heating capacity rating obtained with air entering the indoor unit at 70ºF dry bulb (DB) and
outdoor ambient conditions of 47ºF dry bulb (DB) and 43ºF wet bulb (WB).
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.
19
Installation Manual
R410A
Refrigerant Control
GENERAL DATA
Specifications − Vertical Air Handler NJ Chassis
Table 8: Vertical Air Handler NJ Chassis IDU Specifications
Model No.
Cooling Mode Performance
Capacity (Btu/h)
Power Input1 (W)
Heating Mode Performance
ARNU123NJA4
ARNU183NJA4
ARNU243NJA4
ARNU303NJA4
ARNU363NJA4
12,000
80
18,000
80
24,000
120
30,000
178
36,000
228
Capacity (Btu/h)
13,500
20,000
27,000
34,000
40,000
Power Input1 (W)
80
80
120
178
228
Cooling Max. (°F WB)
76
76
76
76
76
Heating Min. (°F DB)
59
59
59
59
59
Entering Mixed Air
Unit Data
Multi V Ducted Indoor Units
Refrigerant Type2
R410A
R410A
R410A
R410A
R410A
Refrigerant Control
EEV
EEV
EEV
EEV
EEV
Net Unit Weight (lbs.)
117
117
117
117
121
140
140
140
140
144
2 x 18
2 x 18
2 x 18
2 x 18
2 x 18
Type
Sirocco
Sirocco
Sirocco
Sirocco
Sirocco
Motor
1
1
1
1
1
Housing
1
1
1
1
1
Shipping Weight (lbs.)
Communication Cable (No. x AWG)
4
Fan
Motor/Drive
Airflow Rate H/M/L (CFM)
Standard Mode
Airflow Rate H/M/L (CFM)
High Mode (Factory Set)
External Static Pressure (in. wg)
Standard Mode
External Static Pressure (in. wg)
High Mode (Factory Set)
Piping
Brushless Digitally Controlled / Direct
530 / 480 / 380
580 / 530 / 480
710 / 640 / 480
880 / 800 / 630
990 / 880 / 800
530 / 480 / 380
580 / 530 / 480
710 / 640 / 480
880 / 800 / 630
990 / 880 / 800
0.3
0.3
0.3
0.3
0.3
0.5
0.5
0.5
0.5
0.5
Liquid Line (in., O.D.)
1/4 Flare
1/4 Flare
3/8 Flare
3/8 Flare
3/8 Flare
Vapor Line (in., O.D.)
1/2 Flare
1/2 Flare
5/8 Flare
5/8 Flare
5/8 Flare
1
1
1
1
1
Condensate Line (in., I.D.)
Power Input is rated at high speed.
Take appropriate actions at the end of HVAC equipment life to recover, recycle, reclaim or
destroy R410A refrigerant according to applicable regulations (40 CFR Part 82, Subpart F)
under section 608 of CAA.
3
All communication cable to be minimum 18 AWG, 2-conductor, stranded, shielded and
must comply with applicable local and national codes. Ensure the communication cable
is properly grounded at the master outdoor unit only. Do not ground the ODU−IDU communications cable at any other point.
EEV: Electronic Expansion Valve
Power wiring is field supplied and must comply with the applicable local and national
codes. Power Supply (V/Hz/Ø): 208-230/60/1
1
2
20
This unit comes with a dry nitrogen charge.
This data 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%.
Cooling capacity rating obtained with air entering the indoor coil at 80ºF dry bulb (DB) and
67ºF wet bulb (WB) and outdoor ambient conditions of 95ºF dry bulb (DB).
Heating capacity rating obtained with air entering the indoor unit at 70ºF dry bulb (DB) and
outdoor ambient conditions of 47ºF dry bulb (DB) and 43ºF wet bulb (WB).
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 DATA
Specifications − Vertical Air Handler NK Chassis
Table 9: Vertical Air Handler NK Chassis IDU Specifications
Model No.
Cooling Mode Performance
Capacity (Btu/h)
Power Input1 (W)
Heating Mode Performance
ARNU423NKA4
ARNU483NKA4
ARNU543NKA4
42,000
260
48,000
330
54,000
366
Capacity (Btu/h)
46,000
54,000
60,000
Power Input1 (W)
260
330
366
Cooling Max. (°F WB)
76
76
76
Heating Min. (°F DB)
59
59
59
Entering Mixed Air
Unit Data
Refrigerant Type2
R410A
R410A
EEV
EEV
EEV
Net Unit Weight (lbs.)
165
165
165
181
181
181
2 x 18
2 x 18
2 x 18
Type
Sirocco
Sirocco
Sirocco
Motor
1
1
1
Housing
1
1
1
Shipping Weight (lbs.)
Communication Cable (No. x AWG)
4
Installation Manual
R410A
Refrigerant Control
Fan
Motor/Drive
Airflow Rate H/M/L (CFM)
Standard Mode
Airflow Rate H/M/L (CFM)
High Mode (Factory Set)
External Static Pressure (in. wg)
Standard Mode
External Static Pressure (in. wg)
High Mode (Factory Set)
Piping
Brushless Digitally Controlled / Direct
1,250 / 1,100 / 1,000
1,400 / 1,260 / 1,000
1,475 / 1,400 / 1,260
1,250 / 1,100 / 1,000
1,400 / 1,260 / 1,000
1,475 / 1,400 / 1,260
0.3
0.3
0.3
0.5
0.5
0.5
Liquid Line (in., O.D.)
3/8 Flare
3/8 Flare
3/8 Flare
Vapor Line (in., O.D.)
5/8 Flare
5/8 Flare
5/8 Flare
1
1
1
Condensate Line (in., I.D.)
Power Input is rated at high speed.
Take appropriate actions at the end of HVAC equipment life to recover, recycle, reclaim or
destroy R410A refrigerant according to applicable regulations (40 CFR Part 82, Subpart F)
under section 608 of CAA.
3
All communication cable to be minimum 18 AWG, 2-conductor, stranded, shielded and
must comply with applicable local and national codes. Ensure the communication cable
is properly grounded at the master outdoor unit only. Do not ground the ODU−IDU communications cable at any other point.
EEV: Electronic Expansion Valve
Power wiring is field supplied and must comply with the applicable local and national
codes. Power Supply (V/Hz/Ø): 208-230/60/1
1
2
This unit comes with a dry nitrogen charge.
This data 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%.
Cooling capacity rating obtained with air entering the indoor coil at 80ºF dry bulb (DB) and
67ºF wet bulb (WB) and outdoor ambient conditions of 95ºF dry bulb (DB).
Heating capacity rating obtained with air entering the indoor unit at 70ºF dry bulb (DB) and
outdoor ambient conditions of 47ºF dry bulb (DB) and 43ºF wet bulb (WB).
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.
21
GENERAL DATA
Electrical − High-Static BH/BG/BR/B8 Chassis
Table 10: High-Static BH/BG/BR/B8 Chassis Indoor Unit Electrical Data.
Model
Voltage Range
MCA
MOP
Rated Amps (A)
Power Supply
Hz
Volts
Power Input (W)
Phase
Cooling
Heating
BH Units
ARNU073BHA4
1.32
1.06
150
150
ARNU093BHA4
1.32
1.06
150
150
150
150
ARNU123BHA4
ARNU153BHA4
187-253
1.32
1.32
15
1.06
1.06
60
208-230
1
150
150
ARNU183BHA4
1.32
1.06
150
150
ARNU243BHA4
1.32
1.06
150
150
ARNU073BGA4
3.3
2.65
450
450
ARNU093BGA4
3.3
2.65
450
450
ARNU123BGA4
3.3
2.65
450
450
ARNU153BGA4
3.3
2.65
450
450
Multi V Ducted Indoor Units
BG Units
ARNU183BGA4
187-253
3.3
15
2.65
60
208-230
1
450
450
ARNU243BGA4
3.3
2.65
450
450
ARNU283BGA4
3.3
2.65
450
450
ARNU363BGA4
3.3
2.65
450
450
ARNU423BGA4
3.3
2.65
450
450
4.4
3.5
450
450
450
450
450
450
BR Units
ARNU283BRA4
ARNU363BRA4
ARNU423BRA4
4.4
187-253
4.4
3.5
15
3.5
60
208-230
1
ARNU483BRA4
4.4
3.5
450
450
ARNU543BRA4
4.4
3.5
450
450
ARNU363B8A4
6.5
5.2
800
800
ARNU423B8A4
6.5
5.2
800
800
800
800
B8 Units
ARNU483B8A4
187-253
6.5
15
5.2
60
208-230
1
ARNU763B8A4
6.5
5.2
800
800
ARNU963B8A4
6.5
5.2
800
800
MCA : Minimum Circuit Ampacity.
MOP : Maximum Overcurrent Protection.
22
Units are suitable for use on an electrical system where voltage supplied to unit terminals is within the listed range limits.
Select wire size based on the larger MCA value.
Instead of fuse, use circuit breaker.
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 DATA
Electrical − Low-Static Built-In B3/B4 Chassis
Table 11: Low-Static Built-In B3/B4 Chassis Electrical Data.
Model
Voltage Range
MCA
MOP
Rated Amps (A)
Power Supply
Hz
Volts
Power Input (W)
Phase
Cooling
Heating
85
85
85
85
85
85
85
85
115
115
115
115
B3 Units
ARNU073B3G4
ARNU093B3G4
ARNU123B3G4
1.0
187-253
ARNU153B3G4
1.0
1.0
0.76
15
1.0
0.76
0.76
60
208-230
1
0.76
B4 Units
ARNU183B4G4
ARNU243B4G4
187-253
MCA : Minimum Circuit Ampacity.
MOP : Maximum Overcurrent Protection.
1.2
1.2
15
0.97
0.97
60
208-230
1
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.
Installation Manual
Units are suitable for use on an electrical system where voltage supplied to unit terminals is within the listed range limits.
Select wire size based on the larger MCA value.
Instead of fuse, use circuit breaker.
23
GENERAL DATA
Electrical − Low-Static Ducted L1/L2/L3 Chassis
Table 12: Low-Static Ducted L1/L2/L3 Chassis Electrical Data.
Model
Voltage Range
MCA
MOP
Rated Amps (A)
Power Supply
Power Input (W)
Hz
Volts
Phase
60
208-230
1
60
208-230
1
Cooling
Heating
40
40
40
40
85
85
85
85
85
85
115
115
L1 Units
ARNU073L1G4
ARNU093L1G4
208-230
0.5
0.5
15
0.4
0.4
L2 Units
ARNU123L2G4
ARNU153L2G4
1.0
208-230
ARNU183L2G4
1.0
0.76
15
1.0
0.76
0.76
L3 Units
Multi V Ducted Indoor Units
ARNU243L3G4
208-230
MCA : Minimum Circuit Ampacity.
MOP : Maximum Overcurrent Protection.
1.2
15
0.97
60
208-230
1
Units are suitable for use on an electrical system where voltage supplied to unit terminals is within the listed range limits.
Select wire size based on the larger MCA value.
Instead of fuse, use circuit breaker.
Table 13: Vertical Air Handler NJ/NK Chassis Electrical Data.
Model
Voltage Range
MCA
MOP
Rated Amps (A)
Power Supply
Hz
Volts
Power Input (W)
Phase
Cooling
Heating
NJ Units
ARNU123NJA4
1.4
1.12
228
228
ARNU183NJA4
1.4
1.12
228
228
228
228
ARNU243NJA4
208-230
1.4
15
1.12
60
208-230
1
ARNU303NJA4
1.4
1.12
228
228
ARNU363NJA4
1.4
1.12
228
228
2.3
1.8
366
366
366
366
366
366
NK Units
ARNU423NKA4
ARNU483NKA4
208-230
ARNU543NKA4
MCA : Minimum Circuit Ampacity.
MOP : Maximum Overcurrent Protection.
24
2.3
2.3
15
1.8
60
208-230
1.8
1
Units are suitable for use on an electrical system where voltage supplied to unit terminals is within the listed range limits.
Select wire size based on the larger MCA value.
Instead of fuse, use circuit breaker.
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 DATA
Dimensions – High-Static Ducted BH Chassis
Installation Manual
Center of Gravity
Note - All dimensions have a
tolerance of ± 0.25 in.
= Center of gravity
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.
25
GENERAL DATA
Multi V Ducted Indoor Units
Dimensions – High-Static Ducted BG Chassis
26
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 DATA
Dimensions – High-Static Ducted BR Chassis
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.
27
GENERAL DATA
Multi V Ducted Indoor Units
Dimensions – High-Static Ducted B8 Chassis
28
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 DATA
Dimensions – Built-In Low-Static Ducted B3/B4 Chassis
With Suction Grill
With Suction Grill
& Suction Canvas
With Suction Grill
& Suction Canvas
7-1/2
10-7/8
1 8-1/2
24-5/16
15-1/4
15-1/8
Supply Air
Liquid
Vapor
Drain
B2
Return Air
9-13/16
C2
With Suction Grill
Power Connection
7-7/16
A1
A2
2-3/8
Installation Manual
22-5/8
2-1/2
C3
B3
A3
Accessory
PBSGB30
PBSGB40
Model
ARNU073B3G4
ARNU093B3G4
ARNU123B3G4
ARNU153B3G4
7-1/2
19-11/16 (Max)
With Suction Grill
With Suction Grill & Suction Canvas
A2
35-13/16
46-13/16
B2
14-1/8
14-1/8
C2
2-3/16
2-3/16
A1
32-5/8
ARNU183B4G4
ARNU243B4G4
43-5/16
Accessory
PBSC30
PBSC40
A3
32-5/16
43-5/16
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: inches
Note: All measurements
have a tolerance of ±1/4 in.
B3
10-11/16
10-11/16
C3
1-9/16 to 9-13/16
1-9/16 to 9-13/16
29
GENERAL DATA
Dimensions – Low-Static Ducted L1/L2/L3 Chassis
13/16
1-3/8
Top
5-5/16
Multi V Ducted Indoor Units
Air Outlet
D
7-1/2
3-15/16
Vapor Pipe Connection
Liquid Pipe Connection
8-11/16
27-9/16
Drain Pipe Connection
Top
24-3/4
11-1/2
2-5/8 4-1/16
3-1/16
Power Supply Connection
C
Air Inlet
L1 : 2-15/16
L2 : 3-1/16
L3 : 3-3/16
Top
6-1/16
7-1/2
13/16
L1 : 14-7/16
L2 : 22-1/16
L3 : 29-3/4
B
A
Center of Gravity
Unit: inches
Note: All measurements
have a tolerance of ±1/4 in.
30
ARNU073L1G4
ARNU093L1G4
ARNU123L2G4
ARNU153L2G4
ARNU183L2G4
ARNU243L3G4
A
B
C
D
30-1/2
27-9/16
28-7/8
26
38-3/8
35-7/16
36-3/4
33-7/8
46-1/4
43-5/16
44-5/8
41-3/4
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 DATA
Dimensions – Vertical Air Handler NJ Chassis
Supply Air
opening
48-11/16
21-1/4
1-5/8
18
SIDE VIEW
7/8” Wiring
knockouts
Installation Manual
1-15/16
17
7/8” Wiring
knockouts
2-1/8
18
2-1/16
1-9/16
1-9/16
12-1/8
1-15/16
Liquid pipe
48-11/16
TOP VIEW
49-5/16
21-1/4
1-11/16” Wiring
knockouts
2-9/16
Vapor pipe
Drain connection
for upflow application
1-1/2
4-11/16
14-5/16
Return Air
opening
Unit: inches
Note: All measurements
have a tolerance of ±1/4 in.
9-15/16
1-9/16
Drain connection
for horizontal
application
BOTTOM VIEW
13
FRONT VIEW
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.
31
GENERAL DATA
Dimensions – Vertical Air Handler NK Chassis
Supply Air
opening
55-3/16
7/8” Wiring
knockouts
SIDE VIEW
1-15/16
7/8” Wiring
knockouts
2-3/16
24
25
2-1/16
1-9/16
12-1/8
55-3/16
55-13/16
Multi V Ducted Indoor Units
1-9/16
1-5/8
25
21-1/4
Liquid pipe
1-11/16” Wiring
knockouts
21-1/4
2-9/16
Vapor pipe
32
16-15/16
20
FRONT VIEW
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.
1-9/16
Unit: inches
Note: All measurements
have a tolerance of ±1/4 in.
4-11/16
Drain connection
for horizontal
application
1-1/2
14-1/4
Return Air
opening
Drain connection
for upflow application
GENERAL DATA
Refrigerant Piping Diagrams
Figure 5: High-Static Ducted BG/BR/BH, Low-Static Ducted L1/L2L3/B3/B4, and Vertical Air Handler NJ/NK Refrigerant Piping Diagram
lndoor Unit
Heat Exchanger
EEV
Th3
Filter
Th2
Sirocco Fan
Flare Nut
Filter
Th1
Flare Nut
Refrigerant Pipes
to Outdoor Unit
Liquid Line
Installation Manual
Vapor
Line
Cooling
Heating
Th1 = Thermistor, Return Air
Th2 = Thermistor, Pipe In
Th3 = Thermistor, Pipe Out
EEV = Electronic Expansion Valve
Figure 6: High-Static Ducted B8 Refrigerant Piping Diagram
Heat Exchanger
TH3
EEV
TH2
Check
Valve
Sirocco Fan
Solenoid Valve
Flare Nut
Vapor
Line
Filter
Filter
TH1
Flare Nut
lndoor unit
Cooling
Heating
Th1 = Thermistor, Return Air
Th2 = Thermistor, Pipe In
Th3 = Thermistor, Pipe Out
EEV = Electronic Expansion Valve
Refrigerant Pipes
to Outdoor Unit
Liquid Line
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.
33
GENERAL INSTALLATION GUIDELINES
Location Selection
DANGER
To avoid the possibility of fire, do not install the unit in an area where combustible gas may generate, flow, stagnate, or leak. Failure to do so will
cause serious bodily injury or death. Before beginning installation, read the safety summary at the beginning of this manual.
Note:
Select a location for installing the wall-mounted indoor unit (IDU) that meets the following conditions:
Multi V Ducted Indoor Units
•
•
•
•
•
•
Where there is enough structural strength to bear the weight of the unit.
Operating sound from the unit will not disturb occupants.
Include enough space for service access.
Include space for drainage to ensure condensate flows properly out of the unit when it is in cooling mode.
Use a level indicator to ensure the unit is installed on a level plane.
Include space for drainage to ensure condensate flows properly out of the unit when it is in cooling mode
Note:
The unit may be damaged, may malfunctioin, and/or will not operate as designed if installed in any of these conditions:
Do not install the unit near a heat or steam source (Figure 7) , or where considerable amounts of oil, iron powder, or flour are used.
These materials may generate condensate, cause a reduction in h eat exchanger efficiency, or malfuction of the condensate drain. If this is
a potential problem, install a ventillation fan large enough to vent out these materials
Do not install the unit where it will be subjected to direct thermal radiation from other heat sources.
Do not install the unit in an area where combustible gas may generate, flow, stagnate, or leak. There is the possibility of fire.
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.
Do not install additional ventilation products on the chassis of the unit.
Do not install the unit near high-frequency generator sources.
Installing in an Area Exposed to Unconditioned Air
In some installation applications, areas (floors, walls) in some
rooms may be exposed to unconditioned air. The room may be
above or next to an unheated garage or storeroom. To counter
this condition:
• Verify that carpet is or will be installed (carpet may increase
the temperature by three (3) degrees.
• Install radiant heat or another type of heating system to
the floor.
• Add insulatiion between the floor joists.
Figure 7: Installing Near a Heat or Steam Source
Indoor Unit
Include enough
distance
Install a ventilation fan
with sufficient capacity
Heat or steam source
Unpack and Inspect for Freight Damage
CAUTION
Table 2 lists shipping and net weights. To help avoid personnel injury and unit damage, use at least two people when carrying a unit by hand.
Note:
Do not unpack the unit and remove protective materials until ready to install. Before opening the shipping container, check the container labeling to verify the unit received is the correct unit. Verify the unit capacity, type, and voltage. Refer to the Nomenclature chart on page 11. Before
unpacking, carefully move packaged unit to a work area near installation location. After opening, if unit is damaged, repack unit as it was shipped.
RETAIN ALL PACKING MATERIALS. In general, freight damage claims will be denied if the original packing materials are not retained for the claims
adjustor to inspect. File a freight claim and order a replacement unit.
1. Place the box on a solid surface right side up.
2. Cut the white reinforced nylon straps, open the top of the box, and fold back all four flaps.
34
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.
INSTALLATION
Install Ducted IDU Chassis
3.
4.
5.
6.
7.
8.
Remove the protective cardboard/Styrofoam® top sheet and place to the side.
The walls and top panels are not attached to the bottom of the box. Lift the carton by the flaps and remove the box walls and top.
Remove the moisture barrier plastic bonnet.
Check the unit nameplate data and model number. Verify the unit voltage, and capacities are correct before proceeding.
Locate and retain the piping/condensate accessory kit located in the bottom of the box under the refrigerant pipe stubs.
Using two people, carefully lift the unit and inspect for freight damage.
DO NOT lift by the refrigerant piping or drain pipe stub. Lift by
the hangar brackets or chassis frame only. If damage is found, repack the unit as it was received in the original container.
9. If the unit is undamaged, remove and retain the installation manual. It is located under or on top of the unit.
Figure 8: Typical Threaded Rod Hanger and
Attaching Hardware
WARNING
Securely install threaded rod hangars (bolts) and hardware to
prevent the
chassis falling from its installation location.
• There is risk of personnel injury from falling equipment.
• There is risk of injury to personnel from incorrect installation.
Nut
(W3/8 or M10)
Spring washer
(M10)
Note:
• Ensure the unit is properly installed. Incorrectly installed units can
malfunction
resulting in degraded performance or an inoperative unit/system.
• Securely install threaded rod hangars (bolts) and hardware to prevent
the chassis falling from its installation location. There is risk of equipment orproperty damage from falling equipment.
• Use a level indicator to ensure the chassis is installed on a level plane.
Roughing In the Indoor Unit
1.
2.
3.
4.
5.
6.
Flat washer for M10
(accessory)
Flat washer for M10
(accessory)
Nut
(W3/8 or M10)
The following parts are field
supplied:
• Hanging bolt - W-3/8″ or 1/2″
• Nut - W-3/8″ or M10
• Spring washer - M10
Included with the indoor unit:
• Flat washer - M10
Determine the installation location. Ensure the location has enough space to allow necessary duct connections and maintenance access.
Securely install the four field-provided threaded rod hangars to the overhead support locations.
Hang the chassis from the four field-supplied threaded rod hangars. Refer to the threaded rod hangar details in Figure 8.
Use a level to ensure the chassis is level and securely tighten the mounting nuts.
If local code requires an auxiliary drain pan under the unit, install a field-provided auxiliary drain pan.
Connect ductwork to the unit as necessary.
Roughing-In Wall-Mounted Zone Controllers
Note:
• It may be necessary to use a handy box that is sized in metric units, depending on the controller model. Check with your LG representative to verify which size of handy box is needed for the zone controller in question.
• Use only LG-supplied communications cable. Using field-supplied cable may result in communications problems between the zone controller and the indoor unit.
•
DO NOT cut the quick-connect plugs off or adjust the length of the cable.
• Keep the communications cable away from high voltage wires and electromagnetic field (EMF) producing equipment.
•
Do not route power wiring and communications cables in the same conduit.
• Maintain the minimum distance required between the communications cable and power wiring. The minimum required space between the
two is dependent on the voltage of the power wiring. Refer to the appropriate Multi V Outdoor Unit Engineering Manual for
minimum distance specifications.
1. Proper indoor unit operation depends on the location of the room sensor. A good location will protect the zone controller from direct
sunlight and external local sources of water vapor, and heated or cooled air. If no mounting height was specified by the building designer, place the handy box approximately fifty-five (55) inches above the finished floor.
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.
35
Installation Manual
Installation work must be performed by trained personnel and in
accordance with all local or other applicable codes.
Hanging bolt
(W3/8 or M10)
INSTALLATION
Indoor Unit Dimensions
2. Use only LG-provided cable to connect the zone controller. Pull LG communications cable between the zone controller handy box and the
indoor unit. A thirty-three (33) foot length of cable will be found with the wall-mounted zone controller.
3. Store a minimal amount of cable in the handy box. Any additional
Figure 10: Low-Static Ducted Indoor Unit Dimensions.
cable should be coiled and stored near the indoor unit control
M4
panel.
4. If additional cable is needed, order a thirty-three (33) foot LG
M2
Wired Remote Group Control Extension cable (Model No. PZCM1
WRC1).
5. If the cable between the zone controller and the indoor unit is too
M3
long, do not cut the cable and shorten. Coil any spare
communications cable, tie-wrap it, and leave it next to the indoor
unit location.
6. Zone controller rough-in is complete.
H
Multi V Ducted Indoor Units
Airflow
Figure 9: High-Static Ducted Indoor Unit Dimensions.
M1
W
D
M2
Figure 11: Low-Static Ducted Indoor Unit B3/B4 Dimensions.
M4
M4
M2
M3
M1
H
M3
Airflow
D
W
L6
H
Airflow
W
Table 14: Ducted Indoor Unit Dimensions and Weights.
Chassis
Code
Mounting Dimensions (in.)
Major Dimensions (in.)1
Weight
(lbs.)
W
D
H
D
L6
M1
M2
M3
M4
High-Static Ducted Indoor Units
BH
59
34-3/4
17-3/4
10-1/4
4-1/4
36-11/16
14
1
1-7/8
BG
84
46-1/2
17-3/4
11-3/4
4-1/4
48-1/2
14
1
1
BR
112
48-1/2
23-5/16
15
4-7/16
50-1/2
18-3/4
1
1
B8
192
61-5/8
27-1/8
18-1/8
4-11/16
63-7/8
22-7/8
1-3/16
1-3/16
Low-Static Ducted Indoor Units
L1
39
30-1/2
27-9/16
7-1/2
3
28-7/8
24-3/4
5/8
1-3/8
L2
51
38-3/8
27-9/16
7-1/2
3
36-3/4
24-3/4
5/8
1-3/8
L3
60
46-1/4
27-9/16
7-1/2
3
44-5/8
24-3/4
5/8
1-3/8
Low-Static Built-In Ducted Indoor Units
B3
46
32-5/8
22-5/8
7-1/2
1-7/16
33-7/16
15
5/8
3-11/16
B4
57
43-5/16
22-5/8
7-1/2
1-7/16
44-7/16
15
5/8
3-11/16
1
Case dimensions exclude insulation. Add approximately 1/8" for factory-applied external insulation for each side. High-Static models are insulated on all sides. Low-Static models are
insulated on the bottom and end cold surfaces only between the fan discharge and midway to the rear of the unit.
36
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.
INSTALLATION
Duct Connection Dimensions
Figure 12: High-Static Ducted (BH, BG, BR, B8) Indoor Unit Duct
Connection Dimensions.
Figure 13: Low-Static Ducted (L1/L2/L3) Indoor Unit Duct
Connection Dimensions.
Supply
Supply
L1
L1
L2
L3
L2
L3
Return
L5
L6
Return
L7
L5
L6
Figure 14: Low-Static Built-In Ducted (B3, B4) Indoor Unit Duct Connection Dimensions.
L7
L3
Installation Manual
L2
L1
L7
L6
Chassis
Code
L5
Table 15: Duct Connection Dimensions (in.).
Supply Duct Connection
Type
L1
Return Duct Connection
L2
L3
Flange
Depth
Opening Location
L5
L6
L7
Flange
Depth
High-Static Ducted Indoor Units
BH
Flange
6-1/4
29-1/2
1-5/8
1-3/16
Rear
6-3/8
29-1/2
7/8
No Flange
BG
Flange
7-5/16
32-11/16
6-7/8
1
Rear
7-7/8
41-1/8
1
No Flange
BR
Flange
11-5/8
39-5/8
4-9/16
1
Rear
11-1/8
42-15/16
7/8
No Flange
B8
Flange
12-7/16
44-1/4
6-3/4
1
Rear
15-7/16
55
2
1-1/8
Rear
6-1/8
26
3/4
No Flange
Bottom
6-1/16
26
3/4
No Flange
Rear
6-1/8
33-11/16
3/4
No Flange
Bottom
6-1/16
33-13/16
3/4
No Flange
Rear
6-1/8
41-11/16
3/4
No Flange
Bottom
6-1/16
41-11/16
3/4
No Flange
Low-Static Ducted Indoor Units
L1
Flange
5-7/8
26
13/16
5/8
L2
Flange
5-7/8
33-13/16
13/16
5/8
L3
Flange
5-7/8
41-3/4
13/16
5/8
Low-Static Built-In Ducted Indoor Units
B3
Flange
6-7/16
31-5/16
1/2
3/4
Bottom
7
28-9/16
1-1/2
No Flange
B4
Flange
6-7/16
41-5/16
1/2
3/4
Bottom
7
39-9/16
1-1/2
No Flange
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.
37
GENERAL INSTALLATION GUIDELINES
Maintenance Clearances
Figure 15: High-Static Ducted (BG/BR/B8/BH) Indoor Unit
Maintenance Clearances.
C2
Figure 16: Low-Static Ducted (L1/L2/L3) Indoor Unit
Maintenance Clearances.
C1
C2 C1
C3
C3
A3
A3
A2
A1
A1
A2
Multi V Ducted Indoor Units
Figure 17: Low-Static Built-In Ducted (B3, B4) Indoor Unit
Maintenance Clearances.
C1
C2
Note:
C3
When space is available, best practice would be to
leave two (2) to three (3) inches on the end opposite the
control panel. Leave adequate room for visual inspection,
pipe installation, brazing, power wiring, control wiring,
and pipe insulating activities. Provide adequate access to
service nearby piping, drain lines, shutoff valves, etc., following the dimension guidelines listed in the table below.
A3
A1
A2
Table 16: Minimum Maintenance Clearances (in.).
Chassis Code
Control Panel Access
Location*
Major Maintenance Access
C1
C2
C3
Location
A1
A2
A3*
High-Static Ducted Indoor Units
BH
Right End
12
12
10-1/2
Bottom
35
18
11
BG
Right End
12
14
12
Bottom
47
18
12
BR
Right End
12
14
15
Bottom
49
24
15
B8
Right End
12
14
18
Bottom
62
28
19
Low-Static Ducted Indoor Units
L1
Right End
10
12
8
Bottom
30
25
8
L2
Right End
10
12
8
Bottom
38
25
8
L3
Right End
10
12
8
Bottom
46
25
8
Low-Static Built-In Ducted Indoor Units
B3
Left End
10
12
8
Bottom
34
23
8
B4
Left End
10
12
8
Bottom
44
23
8
*Does not apply when the ceiling surface below can be removed.
38
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.
INSTALLATION
Piping Connections
Figure 18: High-Static Ducted (BH/BG/BR/B8)
Indoor Unit Piping Connection Dimensions.
Figure 19: Low-Static Convertible Ducted
(L1/L2/L3) Indoor Unit Piping Connection
Dimensions.
L11
L13
Figure 20: Low-Static Ducted Built-In (B3/B4)
Indoor Unit Piping Connection Dimensions.
Vapor Line
L14
L10
ow
L13
Condensate
L15
L21
fl
Air
L9
L18
Condensate
Pump
(Primary)
L18
L17
L11
L17
L14
L16
L15
Vapor Line
Liquid Line
L12
L5
Vapor Line
L7
L20
L19
Condensate
L6
ow
Liquid Line
Liquid Line
Vapor Line
Airfl
Auxiliary Drain
Gravity Condensate
Table 17: Ducted Indoor Unit Pipe Connections (in.).
1
Inches I.D.
Refrigerant Safety
2
Vapor Line
Conn.
L13
45° Flare
45° Flare
45° Flare
45° Flare
45° Flare
45° Flare
3-15/16
3-15/16
3-15/16
4-13/16
5-1/4
5-1/4
Vapor Line
Conn.
L7
45° Flare 3-1/2
45° Flare 3-1/2
45° Flare 3-1/2
Vapor Line
Conn.
L15
45° Flare 8-1/2
45° Flare 8-1/2
Plastic Resin
L16
3-1/4
3-1/4
3-5/16
3-1/4
4-3/4
4-3/4
Condensate Pump Drain
Dia.1 Conn.2 L11
L18
1.0
1.0
1.0
1.0
1.0
1.0
Plain
Plain
Plain
Plain
Plain
Plain
6-9/16
6-9/16
6-9/16
8-3/4
7-5/8
7-5/8
6-3/4
6-3/4
6-3/4
6-3/4
6-7/8
6-7/8
Gravity Drain (Plugged)
Dia.3 Conn.2 L12
L15
1.0"-14
1.0"-14
1.0"-14
1.0"-14
1.0"-14
1.0"-14
MPT
MPT
MPT
MPT
MPT
MPT
1-1/8
1-1/8
6-9/16
8-3/4
7-5/8
7-5/8
6-9/16
6-9/16
1-1/8
1-1/4
1-1/4
1-1/4
Condensate Pump (Primary)
Auxiliary Drain Connection
L10 Dia.1 Conn.2
L5
L11 Dia.1 Conn.2 L20
L21
4-1/2 1.0 Plain
2
11-1/2 1.0
Plain
6-3/8 9-3/4
4-1/2 1.0 Plain
2
11-1/2 1.0
Plain
6-3/8 9-3/4
4-1/2 1.0 Plain
2
11-1/2 1.0
Plain
6-3/8 9-3/4
Condensate Pump (Primary)
L18 Dia.1 Conn.2 L13
L19
4-15/16 1.0 Plain
10-7/8 5-1/16
4-15/16 1.0 Plain
10-7/8 5-1/16
3
14 Threads Per Inch, Straight Thread
Verify the maximum refrigerant concentration in the space where the indoor unit will be mounted meets the concentration limit
allowed by ASHRAE Standards 15-2010 and 34-2010. There is danger of asphyxiation from oxygen displacement.
ASHRAE Standards 15-2010 and 34-2010 offer guidelines that address refrigerant safety and the maximum allowable concentration of
refrigerant in an occupied space. Refrigerant will dissipate into the atmosphere, but a certain volume of air is required for this to occur safely.
For R410A refrigerant, the maximum allowable concentration of refrigerant is twenty-six (26) lbs. per 1,000 cubic feet of an occupied space.
Buildings with twenty-four (24) hour occupancy allow half of that concentration.1
ASHRAE Standards 15 and 34 assume that if a system develops a leak, its entire refrigerant charge will dump into the area where the leak
occurs. To meet ASHRAE Standards 15 and 34, calculate the refrigerant concentration that may occur in the smallest room volume on the
system, and compare the results to the maximum allowable concentration number.1 Also consult state and local codes in regards to
refrigerant safety.
1
Information about ASHRAE Standard 15-2010 / 34-2010 and addenda current as of the date of this publication.
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.
39
Installation Manual
Liquid Line
Size /
Chassis Dia.1 Conn.
L14
L17 Dia.1
High-Static Ducted Indoor Units
7-18 BH 1/4 45° Flare 1-7/8 3-15/16 1/2
24 BH 1/4 45° Flare 1-7/8 3-15/16 5/8
07-42 BG 3/8 45° Flare 1-7/8 3-15/16 5/8
28-54 BR 3/8 45° Flare 2-13/16 3-15/16 5/8
36-76 B8 3/8 45° Flare 2-1/2 5-1/2
3/4
96 B8
3/8 45° Flare 2-1/2 5-1/2
7/8
Low-Static Convertible Ducted Indoor Units
Liquid Line
Frame
Dia.1 Conn.
L6
L9
Dia.1
L1
1/4 45° Flare 3-7/8 7-1/4 1/2
L2
1/4 45° Flare 3-7/8 7-1/4 5/8
L3
3/8 45° Flare 3-7/8 7-1/4 5/8
Low-Static Bottom Ducted Indoor Units
Liquid Line
Frame
Dia.1 Conn.
L14
L17 Dia.1
B3
1/4 45° Flare 9-7/16 2-9/16 1/2
B4
3/8 45° Flare 9-7/16 2-9/16 5/8
REFRIGERANT PIPING
Piping Preparation
WARNING
Do not braze in an enclosed location. Do not allow the refrigerant to
leak during brazing. Always test for gas leaks before and after brazing.
• If refrigerant combusts, it generates a toxic gas.
Note:
•
Do not use kinked pipe.
Multi V Ducted Indoor Units
Braze the pipe to the service valve pipe stub of the outdoor unit. After brazing,
check for refrigerant gas leaks. When selecting flare fittings, always use a 45°
fitting rated for high-pressure refrigerant R410A. Fittings must also comply with
local, state, and federal standards.
Creating a Flare Fitting
One of the main causes of refrigerant leaks is defective flared connections. Use
the following procedure to create flared connections.
1. Determine the installation location. Ensure the location has enough space to
allow necessary duct connections and maintenance access.
• 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 into the pipe.
2B. Slide the flare nut onto the copper tube.
1. Copper
tube
Pipe
2A.
2B.
Reamer
Point
down
3.
Slanted Uneven Rough
90°
Flare nut
Copper
tube
Handle
Bar
Bar
Yoke
Cone
3. Flare the pipe end.
• Use the proper size flaring tool to finish flared connections as shown.
• ALWAYS create a 45° flare when working with R410A.
4. Carefully inspect the flared pipe end.
• Compare the geometry with the figure to the right.
• If the flare is defective, cut it off and re-do procedure.
• If flare looks good, blow the pipe clean with dry nitrogen.
Copper pipe
Clamp handle
4.
Smooth
Inside is shiny with no scratches
Incorrect Flare
Dimensions of the Flare.
Slanted
Even Length
90°
“A”
45°
R=0.4 – 0.8
40
Red arrow
Surface
Damaged
Cracked
Uneven
Thickness
Pipe Size (in. O.D.)
Outside Diameter (mm)
“A” Dimension (mm [in.])
1/4
6.35
~ 9.1 (11/32 - 23/64)
3/8
9.52
~ 13.2 (1/2 - 33/64)
1/2
12.7
~ 16.6 (41/64 - 21/32)
5/8
15.88
~ 19.7 (49/64 - 25/32)
3/4
19.05
─
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.
REFRIGERANT PIPING
Tightening Flare Nuts
1. When connecting the flare nuts, coat the flare (inside and outside) with polyvinyl ether (PVE) refrigeration oil only.
Note:
•
Do not use polyolyester (POE) or any other type of mineral oil as a lubricant. These lubricants are not compatible with PVE oil used in this system and create oil sludge leading to equipment damage and system malfunction..
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 Flare Nuts
Always use two (2) wrenches to loosen flare nuts.
Outside Diameter (mm)
Tightening Torque (ft-lbs.)
1/4
6.35
13.0 - 18.0
3/8
9.52
24.6 - 30.4
1/2
12.7
39.8 - 47.7
5/8
15.88
45.4 - 59.3
3/4
19.05
71.5 - 87.5
Installation Manual
Pipe Size (in. O.D.)
Keep Pipes Capped While Storing.
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 contaminate the interior with dust, moisture, etc.
Keep refrigerant pipe dry, clean, and airtight.
No moisture should be inside the piping.
Moisture
Possible - Significant hydrolysis of refrigerant oil.
Problems - Refrigerant oil degradation.
- Poor insulation of the compressor.
- System does not operate properly.
- EEVs, capillary tubes are clogged.
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
Clean
Airtight
No dust should be inside the piping.
No leaks should occur.
Dust
- Refrigerant oil degradation.
- Poor insulation of the compressor.
- System does not operate properly.
- EEVs and capillary tubes become
clogged.
- 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.
Leaks
- Refrigerant gas leaks/shortages.
- Refrigerant oil degradation.
- Poor insulation of the compressor.
- System does not operate properly.
- 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.
- Ensure that refrigerant lines are pressure
tested to 550 psig.
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.
41
REFRIGERANT PIPING
Refrigerant Safety
WARNING
Verify the maximum refrigerant concentration level in the space where the indoor unit will be mounted meets the concentration limit for the application.
There is risk of asphyxiation from oxygen depletion.
ASHRAE Standards 15-2010 and 34-2010 offer guidelines that address refrigerant safety and the maximum allowable concentration of
refrigerant in an occupied space. Refrigerant will dissipate into the atmosphere, but a certain volume of air is required for this to occur safely.
For R410A refrigerant, the maximum allowable concentration of refrigerant is twenty-six (26) lbs. per 1,000 cubic feet of an occupied space.
Buildings with twenty-four (24) hour occupancy allow half of that concentration.1
Multi V Ducted Indoor Units
ASHRAE Standards 15 and 34 assume that if a system develops a leak, its entire refrigerant charge will dump into the area where the leak
occurs. To meet ASHRAE Standards 15 and 34, calculate the refrigerant concentration that may occur in the smallest room volume on the
system, and compare the results to the maximum allowable concentration number.1 Also consult state and local codes in regards to
refrigerant safety.
1
Information about ASHRAE Standard 15-2010/34-2010 and addenda current as of the date of this publication.
Brazing
Note:
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 IV 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 and keep stored pipe capped and clean.
• Purge all pipe sections clean 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.
Figure 21: Using Nitrogen Gas During Brazing
Refrigerant Pipe
Regulator
Welding Point
Nitrogen gas
3.0 psi or less
Do not block outlet side.
When pressure inside pipe
is above atmospheric pressure,
pinhole leaks can occur.
42
Tape
(no air bubbles)
Auxiliary
Valve
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.
Nitrogen
Gas
Tank
REFRIGERANT PIPING
A properly installed pipe system will have sufficient support so that pipes will not sag during the life of the system. As necessary, place supports
closer for segments where potential sagging could occur. Maximum spacing of pipe supports must meet local codes.
Figure 22: Pipe Support at Indoor Unit.
Figure 23: Typical Pipe Support Location—Change in Pipe Direction.
B
Max. 12"
A
A + B ~ 12" – 19"
Refrigerant Pipe Connections
~ 12" – 19"
Installation Manual
Indoor units come with flare type connections. It is the installer’s option to use the flare fittings provided or braze the indoor unit to the
refrigerant piping system.
Flare Fittings
• All unit flare fittings are 45° and rate for high-pressure R410A refrigerant.
• Properly form all flare fittings using best practices.
• Place a drop of PVE oil on the outside of the flare fitting before
Figure 24: Typical Refrigerant Line Flare Fitting Insulation Detail
tightening.
Note:
•
Do not use any other type of oil (including traditional POE refrigeration oil) as a lubricant. Failure to follow this procedure may lead to
restrictions in the refrigeration components.
Do not over-tighten flare nuts. Excessive tightening will cause
•
fittings to crack.
Note:
Multi V refrigeration system components contain very small capillary
tubes, small orifices, electronic expansion valves, oil separators, and
heat exchangers that can easily become blocked.
Insulate Refrigerant Pipes
Sufficiently insulate all cold surfaces to prevent moisture forming. All
pipes must be insulated and each pipe must be separately wrapped.
Refer to Figure 24 and Figure 25. Use field-provided one-half (1/2)
inch thick (or thicker) closed-cell insulation. The thickness may need
to be increased based on ambient conditions and local codes.
Insulation for Indoor Unit Port
(Field Supplied) Insulation for Refrigerant
Piping (Field Supplied)
Overlap Insulation Where the
Port and the Piping Meet
Insulation Clip (Field Supplied)
No Clearance
Figure 25: No Air Gap in Pipe Insulation to Indoor Unit Frame.
Wrap all refrigerant and condensate piping including field-provided
isolation ball valves and flexible pipe connection kits provided by LG.
Glue all insulation joints with no air gaps between insulation segments, and between insulation segments and the unit case. Ensure
insulation material fits snugly against the refrigeration pipe with no air
space between the pipe surface and the surrounding insulation.
Protect insulation inside hangers and supports with a second insulation layer. Ensure insulation on all pipe passing through pipe hangers,
inside conduit, and/or sleeves is not compressed.
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.
43
CONDENSATE PIPING
All ducted indoor units except the vertical air handler have a factorymounted condensate pump that runs continuously while the unit is in
cooling mode. The pump has an internal high-level float switch that
stops the unit if the water level in the pan rises too high.
All ducted indoor units have a flexible drain hose kit and one or two
clamps. The hose can be used to connect the condensate pipe to
the condensate pump connection. On high-static units, there is the
option to directly connect a one (1) inch FPT fitting to the drain pan’s
gravity drain connection.
Note:
Table 18: Indoor Unit Drainage Specifications.
Drain Pipe Dia.
Indoor Unit
Drain Type
(ID, in.)
BH, BG, BR, B8 Frame
High Static Ducted
L1, L2, L3 Frame
Low Static Ducted
B3, B4 Frame Built In Ducted
NJ, NK Frame Vertical/Horizontal
Air Handler Unit
27 in. Lift
Drain Pump,
Factory Installed
Ø1
Gravity
Ø1
When making condensate pipe connections, be careful not to exert lateral force on the drain nipple. Internal damage
may occur. Refer to Table 17 for condensate pipe connection sizes.
Multi V Ducted Indoor Units
Condensate Pump Connection
All ducted units have a condensate pump except the vertical air handler unit. Note the following when connecting the condensate pipe to the unit.
•
•
•
•
Indoor units DO NOT come with check valves or a backflow prevention device. If check valves are needed, they must be field supplied.
The maximum lift of all condensate pumps is 27 in.-wg.
Measure lift distance from the bottom surface of the indoor unit, NOT from the condensate pipe connection.
Slope all horizontal condensate pipe segments a minimum of 1/4 inch per foot away from the indoor unit.
Ducted Unit Drain Information
When the bottom surface of the indoor unit is at an elevation below
the receiving building drain line connection, install an inverted trap at
the top of the condensate pump discharge riser before connection to
the building drain pipe.
Figure 26: High Static, Low Static, Built In Ducted Indoor Unit Drain
Pump to Drain Piping System
Hanger distance
Max.
11-13/16 inches
When the receiving drain line is mounted horizontal, connect the
inverted trap to the top half of the pipe. The connection point of the
inverted trap to the building drain pipe should always be to the top
half of the pipe and should never be over 45° either side of the upper
most point of the horizontal building drain line.
If connecting to a vertical drain line or plumbing system vent line,
connect the IDU condensate pump discharge line using a Y-45 fitting
with the double end of the Y-45 fitting facing up. When connecting to
a vertical drain line include an inverted trap at the top of the IDU condensate pump discharge riser before connection to the Y-45 fitting.
Gravity Condensate Pipe Connection
High-static indoor units (BH/BG/BR/B8) have an auxiliary gravity
condensate drain connection just below the condensate pump pipe
connection on the control panel end of the unit. This connection may
be used instead of using the condensate pump.
• Verify the unit is installed with a slight cant toward the gravity
drain connection.
• Remove the rubber plug before connecting the condensate line
to the indoor unit.
• The gravity condensate line must be equipped with a condensate trap for proper condensate flow. Refer to Figure 26 for trap
details.
• All horizontal segments of condensate pipe should be sloped a
minimum of 1/4 inch per foot away from the indoor unit.
• Use materials acceptable by local code.
44
3.3~4.9 feet
1/50~1/100
slope
PVC Elbow
Metal
clamp
Drain pump
Hanger Bracket
PVC Piping
Flexible drain hose
Insulation
Figure 27: Gravity Condensate Trap..
C
A
B
U-Trap
Where:
A = 2-1/2"
B≥2xC
C ≤ 2 x External Static Pressure (in.-wg)
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.
CONDENSATE PIPING
Vertical/Horizontal Air Handler Unit Drain Information
Note:
Figure 28: Vertical / Horizontal Air Handler Unit Drain Piping System.
Drain for Upflow Installations
Install a field-supplied external condensate pan underneath the entire
vertical air handler unit to avoid damage due to condensate overflow.
Vertical / Horizontal Air Handler units have a gravity drain.
• Avoid blocking filter access panel when connecting drain lines.
• An additional external condensate line should run from the unit
into the pan.
• The entire condensate line should be drained from the external
condensate pan.
• Point the drain hose downward for easy drain flow.
Do not use pipe joint connection or PVC/CPVC for the unit
•
drain line connection. Use Teflon® tape.
Install the Condensation Drain Pipe
Figure 30: Drain Piping Slope.
Upward
routing
not allowed
Pipe clamp
Horizontal-Left
Drain Access Hole
Air Filter Cover
Supplementary drain
with proper trap. (Fieldsupplied kit can be used.)
Main drain along with suitable trap.
(A field-supplied trap with sufficient depth can be used. Standard-sized traps
are not sufficient. Refer to the U-Trap Specifications figure for the recommended
condensate trap.)
Figure 29: Vertical / Horizontal Air Handler Unit U-Trap Specifications.
• Install the U-Trap to prevent leaks
caused by blocking the intake air filter.
Installation Manual
• Drain piping must slope down or flow may reverse back to unit.
• During drain piping connection, be careful not to exert extra force
on the drain port on the indoor unit.
• Refer to Table 17 for drain pipe sizing.
• Use polyvinyl chloride pipe.
• Install insulation on the drain piping.
• Use polyethylene foam greater than 5/16 inch thick for insulation.
1. Refer to Figure 30 and plan the drain pipe routing so that the pipe
will slope downward from the indoor unit to its end drain location.
Drain for Horizontal-Left Installations
Applied U-Trap Dimensions
A ≥ 2-9/16 inch
B ≥ 2C
C ≥ 2 x SP
SP = External Pressure
(in. WG)
Ex) External Pressure
= 0.4 in. WG
A ≥ 2-9/16 inches
B ≥ 1-7/12 inches
C ≥ 13/16 inches
B
C
3/4 inch
connector
U-Trap
A
Figure 31: Properly Insulating the Drainage Piping.
Indoor unit
Maintenance
drain port
2. Connect the provided flexible drain pipe to the main drain pipe.
3. Pour water into the flexible pipe as shown in Figure 33 to test for
leaks. Repair leaks if necessary.
4. Route the flexible drain pipe to the indoor unit and connect the
flexible drain pipe to the drain port of the indoor unit.
5. Install field-supplied thermal insulation on the flexible drain pipe
and position snugly against indoor unit.
Figure 32: Do Not Sharply Bend Drain Pipe.
Flexible drain hose
Insulation
Not Required
Insulation
Requir ed
Properly Fitting Insulation
Figure 33: Testing the Drain Pipe.
Pour water to
test for proper
drainage and
no leaks
Drain Pump
Flexible drain hose
Main drain pipe
Drain
port
Glue the joint
Drain hose clip (provided)
Drain pan
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.
45
POWER AND CONTROL WIRING
Overview
Connecting Power and Control Wiring
Indoor unit installation best practices are to connect control wiring (low voltage) and then connect power wiring (high voltage).
Do not apply power to the indoor unit or any Multi V system component until authorized to do so by the system commissioning
agent.
DANGER
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.
Improper connections and inadequate grounding can cause accidental injury or death.
Properly size all circuit breakers or fuses.
Multi V Ducted Indoor Units
There is risk of fire, electric shock, explosion, physical injury or death.
WARNING
The information contained in this manual is intended for use by a trained electrician familiar with applicable
local codes and the U.S. National Electric Code (NEC), and who is equipped with the proper tools and test
instruments.
Failure to carefully read and follow all instructions in this manual can result in personal injury or death.
Connect the indoor unit input power cable but do not apply power to the indoor unit until authorized to do so
by the system commissioning agent.
Inappropriate power connection can result in personal injury or death.
Ensure the unit is connected to a dedicated power source that provides adequate power.
If the power source capacity is inadequate or the electric work is not performed properly, it may result in fire, electric shock, physical
injury or death.
Refer to local, state, and federal codes, and use power wires of sufficient current capacity and rating.
Wires that are too small may generate heat and cause a fire, resulting in physical injury or death.
Secure all field 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 fire and physical injury or death.
Properly tighten all power connections.
Loose wiring may overheat at connection points, causing a fire, physical injury or death.
Note:
Connect the indoor unit input power cable but do not apply power to the indoor unit until authorized to do so
by the system commissioning agent.
Inappropriate power connection can result in equipment damage and will void the LG limited liability warranty.
Do not cut, lengthen or shorten the communications and power cable between a zone controller or dry contact
unit and its connected indoor unit. Do not install the zone controller or dry contact unit in a location where the
communications and power cable cannot be safely and easily connected between the two units. Do not allow
strain on this cable.
Poor cable connections can cause equipment malfunction.
The information contained in this manual is intended for use by an industry-qualified, experienced, trained
electrician familiar with applicable local codes and the U.S. National Electric Code (NEC), and 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 or property damage and will
void the LG limited liability warranty.
46
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.
WIRING
Indoor Unit Communication Cable Connections
Note:
Failure to follow any of these power and communications wiring guidelines or instructions will likely cause
communications errors and unit malfunction.
Polarity matters. When connecting the communications cable conductors at each Multi V system component, be careful the conductor connected to the IDU(A) terminal on the outdoor unit is connected to the
A/3(A) terminal at each indoor unit. The conductor connected to the IDU(B) terminal on the outdoor unit
must be connected to the B/4(B) terminals at each indoor unit. Cross connecting the A/3(A) and B/4(B)
terminals will cause communications errors and system malfunction.
Note:
The minimum distance required between power wires and the communications cable is voltage/amperage
dependent and in cases where either are relatively high the minimum distance may be more than two (2)
inches. Refer to the appropriate LG Multi V Outdoor Unit Engineering Manual on www.lg-vrf.com for detailed
information.
Installation Manual
• Keep communications cables away from line voltage wiring, lighting ballasts, and other devices emitting EMF energy. Maintain a minimum of two (2) inches between line voltage wires and communications or zone controller cables.
• Field provide a minimum of 18-2 AWG, stranded and shielded, PVC or vinyl jacket communications
wiring between the indoor units, heat recovery boxes (if applicable), and outdoor units.
• The outdoor/indoor unit communications cable must be run between components in a daisy chain
configuration. Star or wye configurations are not allowed.
• Refer to the wiring connection diagrams for the appropriate unit (Figure 34 through Figure 40)
Connect the communications cables to the A/3(A) and B/4(B) terminals at indoor units and/or heat
recovery units. Maintain polarity throughout the communications bus. Be sure A/3(A) terminals are
connected to A/3(A) terminals and B/4(B) terminals are connected to B/4(B) terminals.
• Ground the shield of the communications cable at one end only, at the master outdoor unit.
Don’ts
• Never use wire caps and never splice communications cables.
• Star and Wye communications cable configurations are not acceptable.
• Never connect zone controllers or other central control products such as AC Smart, PDI, or LG building
management system gateway products to the IDU/ODU communications cable.
Communication Cable Connection
Note:
When connecting the communications bus between the outdoor unit, indoor unit(s), and heat recovery unit(s),
it does not matter what physical path or route the wire takes. The installer may use discretion when choosing
the order the components are connected to the communications bus, but must maintain the daisy chain and
polarity configuration.
1. If not already done so, read Connecting Power and Control Wiring on the previous page.
2. Remove a knock-out plug from the control box. Remember the communications cable and the power
cable must enter the control box through different knockouts.
3. Field-install a plastic or rubber grommet in the knockout hole to prevent wire chaffing.
4. If using conduit, connect the conduit to the control box using field-provided fittings and industry bestpractice procedures.
5. Provide at least three (3) to four (4) inches of slack cable at each indoor unit.
6. Secure the communications cable to the inside surface of the control box using a field provide nylon
wire clamp.
7. Strip approximately half of an inch of insulation from each communications cable conductor. At each
indoor unit, insert the conductors under the terminal screw.
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.
47
WIRING
Indoor Unit Communications Cable Connections
8. Securely tighten the terminal screws to prevent the communications conductors from coming loose from the terminal block.
9. Secure the communications cable in appropriate locations
outside the indoor unit to prevent damage to the cable or injury to
maintenance personnel.
Figure 34: Location of Power Wiring and Communications Cable Terminals in the High Static
and Low Static Ducted Indoor Units
BG, BR, B8 Frame Terminals
L(L1) N(L2)
A
Lock nut
B
Conduit
mounting
plate
Multi V Ducted Indoor Units
Conduit
Power Supply
High Voltage
(208/230V)
Communications
Figure 35: Terminal Block in the High Static (BH, BG, BR, B8 Frame) Ducted Indoor Units
Outdoor Unit Terminal Block
Indoor Unit Terminal Block
L(L1) N(L2)
YL
Ground
Power Input
208-230V /
60 Hz / 1 Phase
RD
SODU
BK
A B
B
IDU
A
-
INTERNET
-
B
DRY1 DRY2
A
-
GND 12V
-
-
-
Wired Controller
Figure 36: Terminal Block in the Low Static (L1, L2, L2 Frame) Ducted Indoor Units
Outdoor Unit Terminal Block
Indoor Unit Terminal Block
L(L1) N(L2)
Ground
48
3(A) 4(B)
SODU
B
A
IDU
-
INTERNET
-
B
Power Input
208-230V /
60 Hz / 1 Phase
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
DRY1 DRY2
-
-
GND 12V
-
-
WIRING
Indoor Unit Communication Cable Connections
Figure 37: Location of Power Wiring and Communications Cable Terminals in the Built In Ducted Indoor Unit
B3, B4 Frame Terminals
L(L1)
YL
N(L2)
RD
BK
Lock nut
Power Supply
High Voltage
(208/230V)
Conduit
Ground
Power Input
208-230V /
60 Hz / 1 Phase
4(B)
Communications
GND 12V
-
-
Installation Manual
Figure 38: Terminal Block in the Built In Ducted Indoor Units
Outdoor Unit Terminal Block
Indoor Unit Terminal Block
SODU
IDU
INTERNET DRY1 DRY2
L(L1) N(L2)
YL RD BK A B
B
A
B
A
-
3(A)
Wired Controller
Figure 39: Location of Power Wiring and Communications Cable Terminals
in the Vertical/Horizontal Air Handler Unit
Power Wiring Through
Optional Access Hole
Communication Cable Through
Optional Access Hole
Figure 40: Terminal Block in the Vertical / Horizontal Air Handler Units
Outdoor Unit Terminal Block
Indoor Unit Terminal Block
L(L1)
Ground
N(L2)
3(A)
4(B)
SODU
B
A
IDU
-
INTERNET
-
B
A
DRY1 DRY2
-
-
GND 12V
-
-
Power Input
208-230V /
60 Hz / 1 Phase
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.
49
WIRING
Indoor Unit Power Cable Connections
Connecting Power and Control Wiring
Indoor unit installation best practices are to connect control wiring (low voltage) and then connect power
wiring (high voltage). Do not apply power to the indoor unit or any Multi V system component until authorized to do so by the system commissioning agent.
DANGER
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.
Improper connections and inadequate grounding can cause accidental injury or death.
Properly size all circuit breakers or fuses.
Multi V Ducted Indoor Units
There is risk of fire, electric shock, explosion, physical injury or death.
WARNING
The information contained in this manual is intended for use by a trained electrician familiar
with applicable local codes and the U.S. National Electric Code (NEC), and who is equipped
with the proper tools and test instruments.
Failure to carefully read and follow all instructions in this manual can result in personal injury or death.
Connect the indoor unit input power cable but do not apply power to the indoor unit until
authorized to do so by the system commissioning agent.
Inappropriate power connection can result in personal injury or death.
Ensure the unit is connected to a dedicated power source that provides adequate power.
If the power source capacity is inadequate or the electric work is not performed properly, it may result in fire, electric
shock, physical injury or death.
Refer to local, state, and federal codes, and use power wires of sufficient current capacity
and rating.
Wires that are too small may generate heat and cause a fire.
Secure all field 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 fire and physical injury or death.
Properly tighten all power connections.
Loose wiring may overheat at connection points, causing a fire, physical injury or death.
Note:
Connect the indoor unit input power cable but do not apply power to the indoor unit until
authorized to do so by the system commissioning agent.
Inappropriate power connection can result in equipment damage and will void the LG limited liability warranty.
The information contained in this manual is intended for use by a trained electrician familiar
with applicable local codes and the U.S. National Electric Code (NEC), and 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 or property damage and will void the LG limited liability warranty.
50
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.
WIRING
Indoor Unit Power Cable Connections
Read and understand all power-related DANGER and WARNING statements in this manual before working with power cables.
Ensure the power source is disconnected from the indoor unit’s power input cable before connecting the cable.
Improper connections and inadequate grounding can cause accidental injury or death.
Note:
Keep line voltage power away from the communications terminals. Line voltage power applied to the communications terminals will damage the
indoor unit control board and it will have to be replaced. Maintain a minimum of two (2) inches between line voltage wires and communications or
zone controller cables.
Size all field provided electrical components per NEC and local code. Always use copper wire.
Power Wiring Instructions
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.
Installation Manual
1. If not already done so, read Connecting Power and Control Wiring on page 50.
2. Provide clean 208/60/1 power to the unit. Maximum acceptable power fluctuation range is 188 volts to
253 volts.
3. To access the power and communications terminal block on high-static ducted units (BH/BG/BR/B8)
and low-static built-in units (B3/B4), remove the control box cover.
4. To access the power and communications terminal block on low-static ducted units (L1/L2/L3), the
terminal block is behind the end panel of the case. Refer to Figure 19.
5. Remove a knock-out plug from the control box. Do not use the same knock-out as the communications and zone controller cables.
6. To prevent wire chafing, install a field-supplied plastic or rubber grommet in the hole just created by
removing the knock-out plug.
7. If using conduit, follow industry best practice procedures to connect the conduit to the control box
using field-provided fittings.
8. Provide enough slack wire at each indoor unit to connect to the terminal block without tension on the
wire. Route the wire through the conduit (if used) and into the control box. Be sure to keep a minimum
of two (2) inches of spacing between the power wiring and the communications wiring.
9. Secure power wiring to the inside surface of the control box using a field-provided nylon wire clamp.
10. If needed, secure the power wiring in appropriate locations outside the indoor unit to prevent damage
to the wire or injury to maintenance personnel.
11. Strip approximately half (1/2) of an inch of insulation from each of the power wire conductors. Tightly
crimp a spade connector to the Hot, Neutral and Ground Wires. Insert the spade connector under the
appropriate terminal block screw and tighten. Refer to Figure 34 through Figure 40 for details of the
terminal block wiring of the unit being installed.
12. Securely tighten the terminal screws to prevent the conductors from coming loose.
51
WIRING
DIP Switch Settings for Gen4 Equipment
Generation 4 Equipment
Multi V Ducted Indoor Units
The latest versions of LG’s indoor units and outdoor (air/water source) units are designated Generation 4 (Gen 4). For Gen 4 units to operate
with Gen 4 features, the air conditioning system must meet the following requirements:
• All indoor units, heat recovery units, and air/water source units
must be Gen 4.
• All air/water source units must have Gen 4 software
installed.
• Air/water source units DIP switch 3 must be set to ON
(factory default setting is OFF).
• All controllers must support Gen 4 features.
Figure 41 shows the ODU DIP switch. Table 19 lists how combining
different components will affect system operation. Table 20 lists the
serial numbers of air and water source units that have Gen 4 software. All air and water source units, indoor units, heat recovery units,
and controllers in a system must be Gen 4 compatible or the system
will not operate with Gen 4 features.
Figure 41: Location and Setting of ODU DIP Switch 3
ODU/WSU DIP Switch No. 3
ON
ON
OFF
1
1
2
2
3 4
3 4
5
5
6
6
OFF
7
7
1
1
2
2
3 4
3 4
5
5
6
6
7
7
Table 19: System Component Combinations and Operation Status
Air / Water
Source Units*
Gen 4
Gen 4
Gen 4
Gen 4
Gen 4
Gen 2
Indoor Unit(s)**
Gen 4 ONLY
Gen 4 ONLY
Gen 4 ONLY
Any combination of
Gen 2 and Gen 4
Any combination of
Gen 2 and Gen 4
Any combination of
Gen 2 and Gen 4
Heat Recovery
Unit(s)
Model 2A ONLY
Model 2A ONLY
Any combination of
Models 1A, 2A
Model 2A ONLY
Any combination of
Models 1A, 2A
Any combination of
Models 0A****, 1A, 2A
Outdoor Unit DIP
Switch No. 3
Must be ON
OFF
Must be OFF
(factory default)
Must be OFF
(factory default)
Must be OFF
(factory default)
N/A***
Operation Status
System will operate WITH Gen. 4 features.
System will operate but WITHOUT Gen. 4 features.
Does NOT include Gen. 4 features. System will not
operate if DIP Switch No. 3 is ON, and an error code will
be generated.
Does not include Gen. 4 features.
*Gen 4 Air/Water Source Units = Multi V IV or Multi V Water IV with Gen 4 software (see table below for Gen 4 serial numbers) or Multi V S.
Gen 2 Air/Water Source Units = Multi V II, Multi V III, Multi V IV without Gen. 4 software, Multi V Water II, Multi V Water IV without Gen. 4
software, Multi V Mini, Multi V Water Mini, or Multi V Space II.
**Gen 4 Indoor Units model numbers end in “4”; Gen 2 Indoor Units model numbers end in “2” or an “A”, including Hydro Kit.
***DIP Switch No. 3 on Gen 2 air/water source units is not related to Gen 4 features as it is with Gen 4 air/water source units.
****0A Model Heat Recovery units are not for use with Multi V IV, Multi V Water IV, or Multi V III heat recovery systems.
Table 20: Serial Numbers of Air/Water Source Units with Gen 4 Software
Air/Water Source Unit
Model Type
Serial Number of Air/Water
Source Units with
Gen 4 Software
52
Multi V IV Air Source
Heat Pump
Multi V Air Source
Heat Recovery
502********* and Higher
503********* and Higher
Multi V IV Water Source
Heat Pump
Multi V IV Water Source
Heat Recovery
504********* and Higher
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.
WIRING
High-Static Ducted BH Chassis
Figure 42: High-Static Ducted BH Chassis Wiring Diagram
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.
53
WIRING
High-Static Ducted BH Chassis
Table 21: High-Static Ducted BH Chassis Wiring Diagram
Multi V Ducted Indoor Units
CONNECTOR
PURPOSE
FUNCTION
CN-POWER
AC Power supply
AC Power line
CN-MOTOR1
Fan motor output
Motor output of BLDC
CN-DAMPER
N/A
N/A
CN-ZONE
Zone controller
Zone controller connection
CN-EXT
External on / off controller
External on / off Controller connection
CN-EEV
EEV Output
EEV control output
CN-OPTION
Optional PCB EPROM
Option PCB connection
CN-DISPLAY
Display
Display of indoor status
CN-PTC
Auxiliary heater
Connection for Auxiliary Heater
CN-CC
Dry contact
Dry Contact connection
CN-HUMID
N/A
N/A
CN-LEAK
Leak detector
Leak detector connection
CN-FLOAT
Float switch input
Float switch sensing
CN-PIPE/OUT
Discharge pipe sensor
Pipe out thermistor
CN-WF
N/A
N/A
CN-AIRC
N/A
N/A
CN-PIPE/IN
Suction pipe sensor
Pipe in thermistor
CN-ROOM
Room sensor
Room air thermistor
CN-REMO
Wired remote controller
Wired remote control connection
CN-D/PUMP
Drain pump output
AC output for drain pump
CN-485
Communication
Connection between indoor and outdoor units
Table 22: BH Chassis DIP Switch Settings
DIP Switch Setting
SW3
SW4
SW5
GROUP CONTROL
DRY CONTACT
MODE
CONTINUOUS FAN
Off
On
Remarks
Master
Slave
Group control setting using 7-Day Programmable Controller; selects Master /
Slave on each indoor unit
Auto
Sets operation mode for optional Dry Contact accessory
1. Variable: Auto or Manual Mode can be set through 7-Day Programmable
Controller or Wireless Remote Controller (factory default setting is Auto if
there is no setting)
2. Auto: For Dry Contact, it is always Auto mode
On
Selects continuous fan for ducted indoor units.
1. On: Indoor unit fan will always operate at a set fan speed, except when
the system is off, or the outdoor unit is in defrost mode (when the oudoor unit
is in defrost mode, the fan will operate at super low fan speed)
2. Off: Indoor unit fan speed can be changed by on / off
Variable
Off
*For Gen 4 Multi V ducted indoor units, DIP Switches 1, 2, 6 through 8 must be set to OFF. These DIP switches are used for
other models.
**To enable Generation 4 features, outdoor unit DIP Switch No. 3 must be set to ON. Please refer to the Multi V IV, Multi V Water IV, Multi V S Engineering Manual for additional information.
54
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.
WIRING
High-Static Ducted BG Chassis
Optional Connections
Figure 43 shows the control board for the BG chassis. Connect optional equipment to the control board as required for your system.
Figure 43: High-Static Ducted BG Chassis Wiring Diagram
Installation Manual
BG-MEZ61897818
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.
55
WIRING
High-Static Ducted BG Chassis
Table 23: High-Static Ducted BG Chassis Wiring Diagram
Multi V Ducted Indoor Units
CONNECTOR
PURPOSE
FUNCTION
CN-POWER
AC Power supply
AC Power line
CN-MOTOR1
Fan motor output
Motor output of BLDC
CN-VM
Sub PCB to Main PCB power supply
Power supply connection
CN-DAMPER
N/A
N/A
CN-ZONE
Zone controller
Zone controller connection
CN-EXT
External on / off controller
External on / off Controller connection
CN-EEV
EEV Output
EEV control output
CN-OPTION
Optional PCB EPROM
Option PCB connection
CN-DISPLAY
Display
Display of indoor status
CN-PTC
Auxiliary heater
Connection for Auxiliary Heater
CN-CC
Dry contact
Dry Contact connection
CN-HUMID
N/A
N/A
CN-LEAK
Leak detector
Leak detector connection
CN-FLOAT
Float switch input
Float switch sensing
CN-PIPE/OUT
Discharge pipe sensor
Pipe out thermistor
CN-WF
N/A
N/A
CN-AIRC
N/A
N/A
CN-PIPE/IN
Suction pipe sensor
Pipe in thermistor
CN-ROOM
Room sensor
Room air thermistor
CN-REMO
Wired remote controller
Wired remote control connection
CN-D/PUMP
Drain pump output
AC output for drain pump
CN-485
Communication
Connection between indoor and outdoor units
Table 24: BG Chassis DIP Switch Settings.
DIP Switch Setting
SW3
SW4
SW5
GROUP CONTROL
DRY CONTACT
MODE
CONTINUOUS FAN
Off
On
Remarks
Master
Slave
Group control setting using 7-Day Programmable Controller; selects Master /
Slave on each indoor unit
Auto
Sets operation mode for optional Dry Contact accessory
1. Variable: Auto or Manual Mode can be set through 7-Day Programmable
Controller or Wireless Remote Controller (factory default setting is Auto if
there is no setting)
2. Auto: For Dry Contact, it is always Auto mode
On
Selects continuous fan for ducted indoor units.
1. On: Indoor unit fan will always operate at a set fan speed, except when
the system is off, or the outdoor unit is in defrost mode (when the oudoor unit
is in defrost mode, the fan will operate at super low fan speed)
2. Off: Indoor unit fan speed can be changed by on / off
Variable
Off
*For Gen 4 Multi V ducted indoor units, DIP Switches 1, 2, 6 through 8 must be set to OFF. These DIP switches are used for
other models.
**To enable Generation 4 features, outdoor unit DIP Switch No. 3 must be set to ON. Please refer to the Multi V IV, Multi V Water IV, Multi V S Engineering Manual for additional information.
56
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.
WIRING
High-Static Ducted BR Chassis
Optional Connections
Figure 44 shows the control board for the BR chassis. Connect optional equipment to the control board as required for your system.
Figure 44: High-Static Ducted BR Chassis Wiring Diagram
Installation Manual
BR-MEZ66590610
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.
57
WIRING
High-Static Ducted BR Chassis
Table 25: High-Static Ducted BR Chassis Wiring Diagram
Multi V Ducted Indoor Units
CONNECTOR
PURPOSE
FUNCTION
CN-POWER
AC Power supply
AC Power line
CN-MOTOR1
Fan motor output
Motor output of BLDC
CN-MOTOR2
Fan motor output
Motor output of BLDC
CN-VM
Sub PCB to Main PCB power supply
Power supply connection
CN-DAMPER
N/A
N/A
CN-ZONE
Zone controller
Zone controller connection
CN-EXT
External on / off controller
External on / off Controller connection
CN-EEV
EEV Output
EEV control output
CN-OPTION
Optional PCB EPROM
Option PCB connection
CN-DISPLAY
Display
Display of indoor status
CN-PTC
Auxiliary heater
Connection for Auxiliary Heater
CN-CC
Dry contact
Dry Contact connection
CN-LEAK
Leak detector
Leak detector connection
CN-FLOAT
Float switch input
Float switch sensing
CN-PIPE/OUT
Discharge pipe sensor
Pipe out thermistor
CN-WF
N/A
N/A
CN-HUMID
N/A
N/A
CN-AIRC
N/A
N/A
CN-PIPE/IN
Suction pipe sensor
Pipe in thermistor
CN-ROOM
Room sensor
Room air thermistor
CN-REMO
Wired remote controller
Wired remote control connection
CN-D/PUMP
Drain pump output
AC output for drain pump
CN-485
Communication
Connection between indoor and outdoor units
Table 26: BR Chassis DIP Switch Settings.
DIP Switch Setting
SW3
SW4
SW5
GROUP CONTROL
DRY CONTACT
MODE
CONTINUOUS FAN
Off
On
Remarks
Master
Slave
Group control setting using 7-Day Programmable Controller; selects Master /
Slave on each indoor unit
Auto
Sets operation mode for optional Dry Contact accessory
1. Variable: Auto or Manual Mode can be set through 7-Day Programmable
Controller or Wireless Remote Controller (factory default setting is Auto if
there is no setting)
2. Auto: For Dry Contact, it is always Auto mode
On
Selects continuous fan for ducted indoor units.
1. On: Indoor unit fan will always operate at a set fan speed, except when
the system is off, or the outdoor unit is in defrost mode (when the oudoor unit
is in defrost mode, the fan will operate at super low fan speed)
2. Off: Indoor unit fan speed can be changed by on / off
Variable
Off
*For Gen 4 Multi V ducted indoor units, DIP Switches 1, 2, 6 through 8 must be set to OFF. These DIP switches are used for
other models.
**To enable Generation 4 features, outdoor unit DIP Switch No. 3 must be set to ON. Please refer to the Multi V IV, Multi V Water IV, Multi V S Engineering Manual for additional information.
58
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.
WIRING
High-Static Ducted B8 Chassis
Optional Connections
Figure 45 shows the control board for the B8 chassis. Connect optional equipment to the control board as required for your system.
Figure 45: High-Static Ducted B8 Chassis Wiring Diagram
Installation Manual
B8-MEZ66590612
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.
59
WIRING
High-Static Ducted B8 Chassis
Table 27: High-Static Ducted B8 Chassis Wiring Diagram
Multi V Ducted Indoor Units
CONNECTOR
PURPOSE
FUNCTION
CN-POWER
AC Power supply
AC Power line
CN-MOTOR1
Fan motor output
Motor output of BLDC
CN-MOTOR2
Fan motor output
Motor output of BLDC
CN-VM
Sub PCB to Main PCB power supply
Power supply connection
CN-DAMPER
N/A
N/A
CN-ZONE
Zone controller
Zone controller connection
CN-EXT
External on / off controller
External on / off Controller connection
CN-EEV
EEV Output
EEV control output
CN-OPTION
Optional PCB EPROM
Option PCB connection
CN-DISPLAY
Display
Display of indoor status
CN-PTC
Auxiliary heater
Connection for Auxiliary Heater
CN-CC
Dry contact
Dry Contact connection
CN-LEAK
Leak detector
Leak detector connection
CN-FLOAT
Float switch input
Float switch sensing
CN-PIPE/OUT
Discharge pipe sensor
Pipe out thermistor
CN-WF
N/A
N/A
CN-HUMID
N/A
N/A
CN-AIRC
N/A
N/A
CN-PIPE/IN
Suction pipe sensor
Pipe in thermistor
CN-ROOM
Room sensor
Room air thermistor
CN-REMO
Wired remote controller
Wired remote control connection
CN-D/PUMP
Drain pump output
AC output for drain pump
CN-485
Communication
Connection between indoor and outdoor units
Table 28: B8 Unit DIP Switch Settings.
DIP Switch Setting
SW3
SW4
SW5
GROUP CONTROL
DRY CONTACT
MODE
CONTINUOUS FAN
Off
On
Remarks
Master
Slave
Group control setting using 7-Day Programmable Controller; selects Master /
Slave on each indoor unit
Auto
Sets operation mode for optional Dry Contact accessory
1. Variable: Auto or Manual Mode can be set through 7-Day Programmable
Controller or Wireless Remote Controller (factory default setting is Auto if
there is no setting)
2. Auto: For Dry Contact, it is always Auto mode
On
Selects continuous fan for ducted indoor units.
1. On: Indoor unit fan will always operate at a set fan speed, except when
the system is off, or the outdoor unit is in defrost mode (when the oudoor unit
is in defrost mode, the fan will operate at super low fan speed)
2. Off: Indoor unit fan speed can be changed by on / off
Variable
Off
*For Gen 4 Multi V ducted indoor units, DIP Switches 1, 2, 6 through 8 must be set to OFF. These DIP switches are used for
other models.
**To enable Generation 4 features, outdoor unit DIP Switch No. 3 must be set to ON. Please refer to the Multi V IV, Multi V Water IV, Multi V S Engineering Manual for additional information.
60
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.
WIRING
Low-Static Ducted L1 Chassis
Optional Connections
Figure 46 shows the control board for the L1 chassis. Connect optional equipment to the control board as required for your system.
Figure 46: Low-Static Ducted L1 Chassis Wiring Diagram
Installation Manual
L1-MEZ66590602
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.
61
WIRING
Low-Static Ducted L1 Chassis
Table 29: Low-Static Ducted L1 Chassis Wiring Diagram
Multi V Ducted Indoor Units
CONNECTOR
PURPOSE
FUNCTION
CN-POWER
AC Power supply
AC Power line
CN-MOTOR1
Fan motor output
Motor output of BLDC
CN-DAMPER
N/A
N/A
CN-ZONE
Zone controller
Zone controller connection
CN-EXT
External on / off controller
External on / off Controller connection
CN-EEV
EEV Output
EEV control output
CN-OPTION
Optional PCB EPROM
Option PCB connection
CN-DISPLAY
Display
Display of indoor status
CN-PTC
Auxiliary heater
Connection for Auxiliary Heater
CN-CC
Dry contact
Dry Contact connection
CN-AIRC
N/A
N/A
CN-LEAK
Leak detector
Leak detector connection
CN-WF
N/A
N/A
CN-HUMID
N/A
N/A
CN-FLOAT
Float switch input
Float switch sensing
CN-PIPE/OUT
Discharge pipe sensor
Pipe out thermistor
CN-PIPE/IN
Suction pipe sensor
Pipe in thermistor
CN-ROOM
Room sensor
Room air thermistor
CN-REMO
Wired remote controller
Wired remote control connection
CN-D/PUMP
Drain pump output
AC output for drain pump
CN-485
Communication
Connection between indoor and outdoor units
Table 30: L1 Unit DIP Switch Settings.
DIP Switch Setting
SW3
SW4
SW5
GROUP CONTROL
DRY CONTACT
MODE
CONTINUOUS FAN
Off
On
Remarks
Master
Slave
Group control setting using 7-Day Programmable Controller; selects Master /
Slave on each indoor unit
Auto
Sets operation mode for optional Dry Contact accessory
1. Variable: Auto or Manual Mode can be set through 7-Day Programmable
Controller or Wireless Remote Controller (factory default setting is Auto if
there is no setting)
2. Auto: For Dry Contact, it is always Auto mode
On
Selects continuous fan for ducted indoor units.
1. On: Indoor unit fan will always operate at a set fan speed, except when
the system is off, or the outdoor unit is in defrost mode (when the oudoor unit
is in defrost mode, the fan will operate at super low fan speed)
2. Off: Indoor unit fan speed can be changed by on / off
Variable
Off
*For Gen 4 Multi V ducted indoor units, DIP switches 1, 2, 6 through 8 must be set to OFF. These DIP switches are used for
other models.
**To enable Generation 4 features, outdoor unit DIP Switch No. 3 must be set to ON. Please refer to the Multi V IV, Multi V Water IV, Multi V S Engineering Manual for additional information.
62
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.
WIRING
Low-Static Ducted L2/L3 Chassis
Optional Connections
Figure 47 shows the control board for the L2/L3 chassis. Connect optional equipment to the control board as required for your system.
Figure 47: Low-Static Ducted L2/L3 Chassis Wiring Diagram
Installation Manual
L2L3-MEZ66590604
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.
63
WIRING
Low-Static Ducted L2/L3 Chassis
Table 31: Low-Static Ducted L2/L3 Chassis Wiring Diagram
Multi V Ducted Indoor Units
CONNECTOR
PURPOSE
FUNCTION
CN-POWER
AC Power supply
AC Power line
CN-MOTOR1
Fan motor output
Motor output of BLDC
CN-MOTOR2
Fan motor output
Motor output of BLDC
CN-DAMPER
N/A
N/A
CN-ZONE
Zone controller
Zone controller connection
CN-EXT
External on / off controller
External on / off Controller connection
CN-EEV
EEV Output
EEV control output
CN-OPTION
Optional PCB EPROM
Option PCB connection
CN-DISPLAY
Display
Display of indoor status
CN-PTC
Auxiliary heater
Connection for Auxiliary Heater
CN-CC
Dry contact
Dry Contact connection
CN-AIRC
N/A
N/A
CN-LEAK
Leak detector
Leak detector connection
CN-WF
N/A
N/A
CN-HUMID
N/A
N/A
CN-FLOAT
Float switch input
Float switch sensing
CN-PIPE/OUT
Discharge pipe sensor
Pipe out thermistor
CN-PIPE/IN
Suction pipe sensor
Pipe in thermistor
CN-ROOM
Room sensor
Room air thermistor
CN-REMO
Wired remote controller
Wired remote control connection
CN-D/PUMP
Drain pump output
AC output for drain pump
CN-485
Communication
Connection between indoor and outdoor units
Table 32: L2, L3 Unit DIP Switch Settings.
DIP Switch Setting
SW3
SW4
SW5
GROUP CONTROL
DRY CONTACT
MODE
CONTINUOUS FAN
Off
On
Remarks
Master
Slave
Group control setting using 7-Day Programmable Controller; selects Master /
Slave on each indoor unit
Auto
Sets operation mode for optional Dry Contact accessory
1. Variable: Auto or Manual Mode can be set through 7-Day Programmable
Controller or Wireless Remote Controller (factory default setting is Auto if
there is no setting)
2. Auto: For Dry Contact, it is always Auto mode
On
Selects continuous fan for ducted indoor units.
1. On: Indoor unit fan will always operate at a set fan speed, except when
the system is off, or the outdoor unit is in defrost mode (when the oudoor unit
is in defrost mode, the fan will operate at super low fan speed)
2. Off: Indoor unit fan speed can be changed by on / off
Variable
Off
*For Gen 4 Multi V ducted indoor units, DIP switches 1, 2, 6 through 8 must be set to OFF. These DIP switches are used for
other models.
**To enable Generation 4 features, outdoor unit DIP Switch No. 3 must be set to ON. Please refer to the Multi V IV, Multi V Water IV, Multi V S Engineering Manual for additional information.
64
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.
WIRING
Low-Static Built-In B3/B4 Chassis
Optional Connections
Figure 48 shows the control board for the L1 chassis. Connect optional equipment to the control board as required for your system.
Figure 48: Low-Static Built-In B3/B4 Chassis Wiring Diagram
Installation Manual
B3B4-MEZ51186311
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.
65
WIRING
Low-Static Built-In B3/B4 Chassis
Table 33: Low-Static Built-In B3/B4 Chassis Wiring Diagram
Multi V Ducted Indoor Units
CONNECTOR
PURPOSE
FUNCTION
CN-POWER
AC Power supply
AC Power line
CN-MOTOR1
Fan motor output
Motor output of BLDC
CN-MOTOR2
Fan motor output
Motor output of BLDC
CN-VM
Sub PC power supply
Power supply connection
CN-FLOAT
Float switch input
Float switch sensing
CN-ZONE
Zone controller
Zone controller connection
CN-EEV
EEV Output
EEV control output
CN-OPTION
Optional PCB EPROM
Option PCB connection
CN-EXT
External ON / OFF controller
External ON / OFF controller connection
CN-DISPLAY
Display
Display of indoor status
CN-CC
Dry contact
Dry Contact connection
CN-PTC
Auxiliary heater
Connection for Auxiliary Heater
CN-PIPE/OUT
Discharge pipe sensor
Pipe out thermistor
CN-LEAK
Refrigerant leak detector
Refrigerant leak detector connection
CN-PIPE/IN
Suction pipe sensor
Pipe in thermistor
CN-REMO
Wired remote controller
Wired remote control connection
CN-ROOM
Room sensor
Room air thermistor
CN-D/PUMP
Drain pump output
AC output for drain pump
CN-485
Communication
Connection between indoor and outdoor units
Table 34: B3, B4 Unit DIP Switch Settings.
DIP Switch Setting
SW3
SW4
SW5
GROUP CONTROL
DRY CONTACT
MODE
CONTINUOUS FAN
Off
On
Remarks
Master
Slave
Group control setting using 7-Day Programmable Controller; selects Master /
Slave on each indoor unit
Auto
Sets operation mode for optional Dry Contact accessory
1. Variable: Auto or Manual Mode can be set through 7-Day Programmable
Controller or Wireless Remote Controller (factory default setting is Auto if
there is no setting)
2. Auto: For Dry Contact, it is always Auto mode
On
Selects continuous fan for ducted indoor units.
1. On: Indoor unit fan will always operate at a set fan speed, except when
the system is off, or the outdoor unit is in defrost mode (when the oudoor unit
is in defrost mode, the fan will operate at super low fan speed)
2. Off: Indoor unit fan speed can be changed by on / off
Variable
Off
*For Gen 4 Multi V ducted indoor units, DIP switches 1, 2, 6 through 8 must be set to OFF. These DIP switches are used for
other models.
**To enable Generation 4 features, outdoor unit DIP Switch No. 3 must be set to ON. Please refer to the Multi V IV, Multi V Water IV, Multi V S Engineering Manual for additional information.
66
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.
WIRING
Vertical Air Handler NJ Chassis
Optional Connections
Figure 49 shows the control board for the NJ chassis. Connect optional equipment to the control board as required for your system.
Figure 49: Vertical Air Handler NJ Chassis Wiring Diagram
Installation Manual
NJ-MEZ62689314
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.
67
WIRING
Vertical Air Handler NJ Chassis
Table 35: NJ Frame Wiring Diagram Legend.
Multi V Ducted Indoor Units
Terminal
Purpose
Function
CN-POWER
AC Power supply
AC Power line
CN-MOTOR1
Fan motor output
Motor output of BLDC
RV-VM
Sub PC power supply
Power supply connection
CN_OUT
Heater
Connection for heater
CN-FLOAT
Float switch input
Float switch sensing
CN-ZONE
Zone controller
Zone controller connection
CN-EEV
EEV Output
EEV control output
CN-OPTION
Optional PCB EPROM
Option PCB connection
CN-EXT
External ON / OFF controller
External ON / OFF controller connection
CN-DISPLAY
Display
Display of indoor status
CN-CC
Dry contact
Dry Contact connection
CN-PTC
Auxiliary heater
Auxiliary heater connection
CN-PIPE/OUT (RD)
Discharge pipe sensor
Pipe out thermistor
CN-LEAK (VI)
Refrigerant leak detector
Refrigerant leak detector connection
CN-PIPE/IN (WH)
Suction pipe sensor
Pipe in thermistor
CN-REMO (GN)
Wired remote controller
Wired remote control connection
CN-ROOM (YL)
Room sensor
Room air thermistor
CN-D/PUMP
Drain pump output
AC output for drain pump
CN-485
Communication
Connection between indoor and outdoor units
Table 36: NJ Frame DIP Switch Settings.
DIP Switch Setting
SW3
SW4
GROUP CONTROL
DRY CONTACT
MODE
Off
On
Remarks
Master
Slave
Group control setting using 7-Day Programmable Controller; selects Master /
Slave on each indoor unit
Auto
Sets operation mode for optional Dry Contact accessory
1. Variable: Auto or Manual Mode can be set through 7-Day Programmable
Controller or Wireless Remote Controller (factory default setting is Auto if
there is no setting)
2. Auto: For Dry Contact, it is always Auto mode
Variable
SW5
CONTINUOUS FAN
Off
On
Selects continuous fan for ducted indoor units.
1. On: Indoor unit fan will always operate at a set fan speed, except when
the system is off, or the outdoor unit is in defrost mode (when the oudoor unit
is in defrost mode, the fan will operate at super low fan speed)
2. Off: Indoor unit fan speed can be changed by on / off
SW6
HEATER INTERLOCK
Off
On
Selects heater interlock function for vertical air handler units
1. On: Automatic (heater will automatically operate during heating mode)
2. Off: Manual (heater needs to be manually turned on during heating mode)
*For Gen 4 Multi V vertical air handler indoor units, DIP switches 1, 2, 7 and 8 must be set to OFF. These DIP switches are
used for other models.
**To enable Generation 4 features, outdoor unit DIP Switch No. 3 must be set to ON. Please refer to the Multi V IV, Multi V Water IV, Multi V S Engineering Manual for additional information.
68
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.
WIRING
Vertical Air Handler NK Chassis
Optional Connections
Figure 49 shows the control board for the NK chassis. Connect optional equipment to the control board as required for your system.
Figure 50: Vertical Air Handler NK Chassis Wiring Diagram
Installation Manual
NK-MEZ62689315
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.
69
WIRING
Vertical Air Handler NK Chassis
Table 37: NK Frame Wiring Diagram Legend.
Multi V Ducted Indoor Units
Terminal
Purpose
Function
CN-POWER
AC Power supply
AC Power line
CN-MOTOR1
Fan motor output
Motor output of BLDC
RV-VM
Sub PC power supply
Power supply connection
CN_OUT
Heater
Connection for heater
CN-FLOAT
Float switch input
Float switch sensing
CN-ZONE
Zone controller
Zone controller connection
CN-EEV
EEV Output
EEV control output
CN-OPTION
Optional PCB EPROM
Option PCB connection
CN-EXT
External ON / OFF controller
External ON / OFF controller connection
CN-DISPLAY
Display
Display of indoor status
CN-CC
Dry contact
Dry Contact connection
CN-PTC
Auxiliary heater
Auxiliary heater connection
CN-PIPE/OUT (RD)
Discharge pipe sensor
Pipe out thermistor
CN-LEAK (VI)
Refrigerant leak detector
Refrigerant leak detector connection
CN-PIPE/IN (WH)
Suction pipe sensor
Pipe in thermistor
CN-REMO (GN)
Wired remote controller
Wired remote control connection
CN-ROOM (YL)
Room sensor
Room air thermistor
CN-D/PUMP
Drain pump output
AC output for drain pump
CN-485
Communication
Connection between indoor and outdoor units
Table 38: NK Frame DIP Switch Settings.
DIP Switch Setting
SW3
SW4
GROUP CONTROL
DRY CONTACT
MODE
Off
On
Remarks
Master
Slave
Group control setting using 7-Day Programmable Controller; selects Master /
Slave on each indoor unit
Auto
Sets operation mode for optional Dry Contact accessory
1. Variable: Auto or Manual Mode can be set through 7-Day Programmable
Controller or Wireless Remote Controller (factory default setting is Auto if
there is no setting)
2. Auto: For Dry Contact, it is always Auto mode
Variable
SW5
CONTINUOUS FAN
Off
On
Selects continuous fan for ducted indoor units.
1. On: Indoor unit fan will always operate at a set fan speed, except when
the system is off, or the outdoor unit is in defrost mode (when the oudoor unit
is in defrost mode, the fan will operate at super low fan speed)
2. Off: Indoor unit fan speed can be changed by on / off
SW6
HEATER INTERLOCK
Off
On
Selects heater interlock function for vertical air handler units
1. On: Automatic (heater will automatically operate during heating mode)
2. Off: Manual (heater needs to be manually turned on during heating mode)
*For Gen 4 Multi V vertical air handler indoor units, DIP switches 1, 2, 7 and 8 must be set to OFF. These DIP switches are
used for other models.
**To enable Generation 4 features, outdoor unit DIP Switch No. 3 must be set to ON. Please refer to the Multi V IV, Multi V Water IV, Multi V S Engineering Manual for additional information.
70
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.
WIRING
Optional Wall-Mounted Sensor and Controller
Wall-Mounted Sensor Installation
Proper indoor unit operation depends on the location of the room sensor. A good location will protect the zone controller from direct sunlight
and external local sources of water vapor, and heated or cooled air. If no mounting height was specified by the building designer, place the
handy box approximately fifty-five (55) inches above the finished floor.
• It may be necessary to use a handy box that is sized in metric units, depending on the controller model. Check with your LG representative
to verify which size of handy box is needed for the zone controller in question.
• Use only LG-supplied communications cable. Using field-supplied cable may result in communications problems between the zone controller and the indoor unit.
• Maintain the minimum distance required between the communications cable and power wiring. The minimum required space between
the two is dependent on the voltage of the power wiring. Refer to the appropriate Multi V Outdoor Unit Engineering Manual for minimum
distance specifications.
Do not route power wiring and communications cables in the same conduit.
Do not cut the quick-connect plugs off or adjust the length of the cable. Keep the communications cable away from high voltage wires
and electromagnetic field (EMF) producing equipment.
Since the room temperature sensor is inside the remote controller, the remote controller should be installed in a place away from direct sunlight, high humidity and direct supply of hot or cold air to maintain proper space temperature. Install the remote controller about 5 ft above
the floor in an area with good air circulation and an average temperature.
Do not install the remote controller where it can be affected by the following:
Figure 51: Wired Remote Controller Installation
• 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 LEDs, the remote controller should be installed properly as shown below. The standard height is 4 - 5 ft from floor level.
TEMP
yes
Remote Controller
no
TEMP
Remote Controller
no
TEMP
Rem
ote
Cont
5ft
roller
1. Pull communications cable between the zone controller handy box (if used) and
no
the indoor unit. The wall-mounted zone controller comes with a thirty (33) foot
length of cable.
2. Store a minimal amount of cable in the handy box. Any additional cable should be
coiled and stored near the indoor unit control panel.
3. If additional cable length is needed, order a thirty-three (33) foot LG Wired Remote Group Control Extension cable (Model No. PZCWRC1).
4. If the cable between the zone controller and the indoor unit is too long, do not cut the cable and shorten. Coil any spare communications
cable, tie-wrap it, and leave it next to the indoor unit location.
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.
71
Installation Manual
Wall-Mounted Controller Installation
CONTROLS SETUP
Controlling the Indoor Unit
The method and configuration of controlling the indoor unit will vary according to your system’s requirements.
•
•
•
•
•
•
•
It is possible to control up to 16 indoor units with one wired remote controller.
Set only one indoor unit in a group to master; set the others to slave.
This indoor unit can be connected in a control group with any other types of LG indoor units.
It is possible to use a wireless remote controller at the same time as the wall controller.
It is possible to connect a dry contact and central controller at the same time (to a master indoor unit only).
A central controller can control all indoor units in a group by controlling the master unit of the group.
Slave indoor units can not be individually controlled by the central controller.
DIP Switch Settings
Multi V Ducted Indoor Units
Refer to Figure 52. If the indoor unit is a master, set switch 3 of the indoor unit’s DIP switch to Off. If the indoor unit is a slave, set switch 3 of
the indoor unit’s DIP switch to On.
Figure 52: Ducted IDU Master/Slave DIP Switch Settings
To Select MASTER:
No. 3: Off
To Select SLAVE:
No. 3: On
Table 39: Ducted IDUs DIP Switch Settings
Switch
3
Function name
Group Control
4
Dry Contact Mode
5
Continuous Fan
Off
On
Remarks
Master
Slave
Group control setting using 7-Day Programmable Controller; selects Master/Slave on
each indoor unit
Auto
Sets operation mode for optional Dry Contact accessory:
1. Variable: Auto or Manual Mode can be set through 7-Day Programmable
Controller or Wireless Remote Controller (factory default setting is Auto if there is
no setting)
2. Auto: For Dry Contact, it is always Auto mode
On
Selects continuous fan for ducted indoor units:
1. On: Indoor unit fan will always operate at a set fan speed, except when the
system is off, or the outdoor unit is in defrost mode (when the oudoor unit is in
defrost mode, the fan will operate at super low fan speed)
2. Off: Indoor unit fan speed can be changed by on/off
Variable
Off
Table 40: NJ, NK Frame Additional DIP Switch Settings.
DIP Switch Setting
SW6
HEATER INTERLOCK
Off
On
Remarks
Off
On
Selects heater interlock function for vertical air handler units
1. On: Automatic (heater will automatically operate during heating mode)
2. Off: Manual (heater needs to be manually turned on during heating mode)
*For use with Multi V systems, switches 1, 2, 6, 7, and 8 MUST be set to Off for ducted IDUs.
**To enable Generation 4 features, outdoor unit DIP Switch No. 3 must be set to ON. Please refer to the Multi V IV, Multi V
Water IV Engineering Manual for additional information. Please refer to the Multi V IV, Multi V Water IV, Multi V S Engineering
Manual for additional information.
72
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.
CONTROLS SETUP
Group Control
Figure 53, Figure 54, and Figure 55 show examples of typical control configurations. Figure 53 shows one wired remote controller configured
as a Master to control a group of indoor units. Figure 54 shows two wired remote controllers, one configured as a Master and the other as a
Slave. Figure 55 shows a system with indoor units and fresh air units configured as two groups, each with a Master wired controller. Configure the fresh air units as one group and the standard indoor units as another group. Figure 56 shows both a correct and an incorrect control
configuration for this type of mixed unit system.
Figure 53: Group Control - Method 1
LGAP Network System
LGMV
ACP Bacnet/ACP LON
(Optional)
AC Smart
Other Building
Mgmt System
(Optional)
Slave
Master
Master
Display
Error
Message
Installation Manual
Dry
Contact
(Optional)
Slave
Slave
▪ Connect Signal and GND lines between slave indoor units
▪ Do not connect 12V line between slave indoor units
12V
Signal
GND
Figure 54: Group Control - Method 2
LGAP Network System
LGMV
AC Smart
ACP Bacnet/ACP LON
(Optional)
Other Building
Mgmt System
(Optional)
Dry
Contact
(Optional)
Slave
Master
Display
Error
Message
Master
Slave
Slave
▪ Connect Signal and GND lines
between slave indoor units
▪ Do not connect 12V line
between slave indoor units
12V
Display
Error
Message
Slave
Signal
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.
GND
73
CONTROLS SETUP
Figure 55: Group Control - Method 3
LGAP Network System
LGMV
AC Smart
ACP Bacnet/ACP LON
(Optional)
Other Building
Mgmt System
(Optional)
Dry
Contact
(Optional)
Multi V Ducted Indoor Units
FAU
Master
FAU
Slave
Display
Error
Message
Master
Master
Display
Error
Message
Slave
▪ Connect Signal and GND
lines to slave indoor units
Master
12V
▪ Do not connect 12V line
to slave indoor units
Signal
GND
Figure 56: Control Wiring with Standard IDU and Fresh Air Unit
Correct Control Wiring
Standard Standard
ZC
74
Incorrect Control Wiring
FAU
ZC
FAU
Standard Standard
FAU: Fresh Air Intake Unit
Standard: Standard Indoor Unit
ZC: Zone Controller
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.
CONTROLS SETUP
Remote Control
Figure 57 shows an example of a remote control configuration.
Figure 57: Remote Control
LGAP Network System
LGMV
AC Smart
ACP Bacnet/ACP LON
(Optional)
Other Building
Mgmt System
(Optional)
Dry
Contact
(Optional)
Display
Error
Message
12V
Signal
Installation Manual
Remote
Sensor
Master
GND
Master
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.
75
INSTALLATION CHECKLIST
PAGE 1 of 2
System ID No.:__________________________________________________ Indoor Unit ID.:_____________________________________
4-Way Cassette Indoor Unit
Checked by:___________________________________ Date:__________________ Signature:____________________________________
Rough-In
Packing materials and literature removed from fan discharge.
Airflow direction correct.
Fan wheels spin without obstruction.
Unit is properly supported – mounting bolts tight.
Unit is level (condensate pump installations).
Unit is canted toward gravity drain pan nipple (gravity drain installations only).
Recommended minimum service clearances followed.
Air filter is clean and properly installed.
Does local code require a secondary drain pan under the indoor unit? Is a secondary drain line connected
to the pan?
Ductwork
All seams sealed – no air leaks.
High-static models only – minimum external static pressure requirements met.
Ductwork is properly sized considering the available external static pressure rating of the indoor unit fan.
No kinks present in the flexible ductwork. Ductwork is properly supported.
Ductwork balancing dampers have been installed and are correctly adjusted or open.
Grilles and registers are properly sized and installed.
Refrigerant Piping
A dry nitrogen purge rate of three (3) psig was maintained during all brazing activity.
PVE refrigerant oil was used as a lubricant on flare fittings (POE type was NOT used).
Field formed pipe flares are 45°.
Flare fittings were properly tightened.
Refrigerant pipe is properly supported to keep lateral pressure off unit connections.
Refrigerant shutoff valves are full port design with integral Schrader port rated for R410A (option).
Shutoff valves have the same internal pipe diameter as the connected pipe (option).
Two shutoff valves were installed; one (1) high pressure liquid, one (1) low pressure vapor (option).
Shutoff valves installed with Schrader port between the indoor unit and the ball of the valve (option).
Condensate System
Condensate pipe is properly sized and supported to keep lateral pressure off unit connections.
Condensate pipe horizontal segments are sloped a minimum of 1/4"/100' of pipe away from the indoor unit.
Condensate pipe and drain traps were sized using LG recommendations.
Field-provided condensate line check valve was installed in the condensate pipe riser (option).
Condensate traps were installed on gravity drain pipes (High-Static models only).
Condensate line vertical rise between indoor unit bottom and high point of the line does not exceed 27-1/2".
Condensate pump power has been disconnected (High-Static indoor unit gravity-drain installations only).
Condensate pump riser intersects the building main drain using an inverted trap with connection to the top half
of the drain line with no more of a ±45° of vertical.
If required by local code, is a secondary high level condensate shutoff switch present/wired properly (factory
provided internal high level float switch will shut down cooling operation if high water level in the pan is detected)?
Insulation
Additional housing, refrigerant and condensate pipe insulation has been supplemented to prevent sweating
while operating if indoor unit installed in abnormal environmental conditions. (Optional - job condition specific.)
All pipes are independently insulated. All insulation seams and joints are airtight. Insulation is not compressed.
Double layer insulation is provided at pipe supports and wall penetrations.
76
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.
N/A Not Complete Complete
N/A Not Complete Complete
N/A Not Complete Complete
N/A Not Complete Complete
N/A Not Complete Complete
INSTALLATION CHECKLIST
PAGE 2 of 2
System ID No.:__________________________________________________ Indoor Unit ID.:_____________________________________
Checked by:___________________________________ Date:__________________ Signature:____________________________________
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.
N/A Not Complete Complete
N/A Not Complete Complete
N/A Not Complete Complete
77
Installation Manual
Electrical
Power provided is single phase, ±10% of indoor unit nameplate specifications.
Power wires properly sized and protected per NEC and local codes. Indoor unit is properly grounded.
Power and communications conductors are separated by the recommended minimum distance.
Terminal block screws are tight. Power wires are not in contact with terminals 3(A) and / or 4(B). Line voltage
wires have spade connectors installed.
Power wires are properly secured to the control box case to prevent wire tension at the terminal block.
Wires are protected from chaffing at control box and conduit pipe penetrations.
(Optional) Smoke detector is properly installed and wired. New batteries are installed (if applicable).
Low voltage control cables are properly secured to the control panel case. Terminal block screws are tight and
the cable is protected from sharp edges at control box case and conduit openings.
Cables are installed at recommended distances from high voltage and EMF generating equipment.
Outdoor unit / Indoor unit communications cable (terminals 3[A] and 4[B]).
Field provided communications cable is 18-2 stranded and shielded. All terminations are made at the terminal
block. No inline splices or wire caps are present.
Communications cable is plenum rated.
Communications cable shield is tied back and is grounded at only ONE end.
Wall Mounted Zone Controller Communications
LG factory provided zone controller stranded, shielded (white jacket) cable was used between the zone
controller(s) and indoor unit(s).
Zone controller cable has not been cut, spliced, or tied together with wire caps. Factory plugs are present.
Cable is securely plugged into the socket on the zone controller or the three screw terminals (controller model
specific); Yellow to “Y”, Red to “R”, and Black to “B”.
Zone controller DIP switches have been adjusted for the application’s space temperature sensing strategy.
Indoor Unit Control Panel
Zone controller cable is securely plugged into the CN-REMO socket on the indoor unit circuit board.
If an optional remote temperature sensor was installed, the associated cable is plugged into socket CN-ROOM
(the factory return air thermistor has been unplugged).
Indoor unit DIP switches have been adjusted for application (group control-master/slave; continuous fan
operation; dry contact).
If a gravity drain primary condensate system is used (condensate pipe ONLY connected to the lowest nipple)
the CN-D / Pump plugged has been removed from the socket on the control board (High-Static models only).
All plugs are properly seated in the sockets on the control board.
Power and communications cables are properly restrained and separated.
Multi V Ducted Indoor Units
78
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.
Who to call for assistance
Your LG Manufacturer Representative
Your LG Manufacturer Representative
Your LG Manufacturer Representative
Your LG Manufacturer Representative
1-888-865-3026
Installation Manual
Freight Damage and Unit Replacements
Missing Parts
Freight Damage and Unit Replacements
Received Wrong Indoor Unit Model
Installation, Startup, and Commissioning Technical Assistance
For warranty information, visit www.lghvac.com.
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.
79
20001747
ISO 9001: 2008
LG ELECTRONICS INC.
LG Electronics
Commercial Air Conditioning Division
11405 Old Roswell Road
Alpharetta, Georgia 30009
www.lghvac.com
LG Customer Information Center, Commercial Products
1-888-865-3026 USA
Follow the prompts for commercial A/C products and parts.
IM_MultiV_Ducted_IDU_5_16
Supersedes: IM-MultiV-DuctedIDU-08-14
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