LG ARNH963K2A2 User manual

Installation Manual
Hydro Kit Medium Temperature (K2)
Hydro Kit High Temperature (K3)
Hydro Kit Medium Temperature (K2)
Btu/h 107,500
Hydro Kit High Temperature (K3)
Btu/h 86,000

This symbol indicates a potentially hazardous situation which, if not avoided, may result in death, serious injury, property
damage or equipment damage.
This symbol indicates a tip or recommendation.
Recommendations instruct the user to apply the suggested practice to ensure the best operating results in order to achieve the
maximum benet of the product.
Tips contain practical information that may help the user solve a problem or describe actions that may save time.
This symbol indicates additional helpful information such as an explanation, a comment, or a clarication about the subject.
The instructions included in this manual must be followed to prevent product malfunction, property damage, injury, or death to the user or
other people. Incorrect operation due to ignoring any instructions will cause harm or damage. The level of seriousness is classified by the
symbols described below.
Do not throw away, destroy, or lose this manual.
Please read carefully and store in a safe place for future reference.
Content familiarity required for proper installation.
For more technical materials such as submittals, engineering
databooks, and catalogs, visit www.lg-vrf.com.
For continual product development, LG Electronics U.S.A., Inc., reserves the right to change specifications without notice.
©LG Electronics U.S.A., Inc.
This document, as well as all reports, illustrations, data, information, and other materials are the property of LG Electronics U.S.A., Inc.
PROPRIETARY DATA NOTICE
This document, as well as all reports, illustrations, data, information, and
other materials are the property of LG Electronics U.S.A., Inc., and are
disclosed by LG Electronics U.S.A., Inc., only in confidence.
This document is for design purposes only.
VRF-IM-BT-001-US_014A06

SAFETY PRECAUTIONS ....................................................................... 5
Roughing-In......................................................................................... 5
Power Wiring and Communications Cabling ....................................... 6
Installation ........................................................................................... 7
Wiring Precautions .............................................................................. 7
Operation and Maintenance ................................................................ 8
INTRODUCTION..................................................................................... 9
Nomenclature....................................................................................... 10
Unit Features.........................................................................................11
Parts...................................................................................................... 13
Installation Parts................................................................................ 13
Optional Accessories ......................................................................... 13
Specications ...................................................................................... 14
Dimensions .......................................................................................... 15
Wiring ................................................................................................... 17
ROUGHING-IN...................................................................................... 19
Unpack the Indoor Unit / Inspect for Freight Damage ..................... 19
Receiving / Transportation / Storage ................................................. 21
General Mounting / Anchoring ........................................................... 22
Hydro Kit Wall Mounted Controller.................................................... 23
Piping.................................................................................................... 24
Refrigerant Piping ............................................................................... 26
Water Piping......................................................................................... 27
Strainer Installation............................................................................ 30
Solar Heating System Piping.............................................................. 32
Solar Heating System Interface Kit (PHLLA)..................................... 32
Water Piping Schematic...................................................................... 33
Water Circuit Preparation ................................................................... 34
Power Wiring........................................................................................ 35
Dry Contact Wiring.............................................................................. 36
Communications Cables..................................................................... 37
LG Remote Temperature Sensor....................................................... 40
FINISH UP............................................................................................. 41
Accessory Installation ................................................................... 41-53
Independent Power Module (K2 Only) .............................................. 41
Hydro Kit Medium Temperature (K2) Control Panel Layout 43
Hydro Kit High Temperature (K3) Control Panel Layout .................... 43
Terminating Group Controlled Hydro Kits .......................................... 46
PRE-COMMISSIONING........................................................................ 54
Group Control Setup........................................................................... 54
Plan the Multi V System Central Control Addresses Assignments 54
Hydro Kit/Indoor Unit Central Control Address Assignments 54
Hex Address Assignment Limitations................................................. 54
Multi V System Central Controller Communications Limitations 54
Group Control Setup........................................................................... 55
DIP Switch Setting - Hydro Kit Medium Temperature ...................... 56
DIP Switch Setting - Hydro Kit High Temperature............................ 57
Installer Setting Conguration........................................................... 58
Installer Setting Function Codes ....................................................... 59
Function Codes - Common Settings ................................................. 60
Function Codes - Hydro Kit Medium Temperature........................... 62
Function Codes - Hydro Kit High Temperature ................................ 66
UNIT OPERATION ................................................................................ 70
Emergency Operation ......................................................................... 71
Maintenance......................................................................................... 72
Seasonal (K2, K3) ................................................................................ 72
Hydro Kit Accessories ........................................................................ 73
Troubleshooting .................................................................................. 75
Error Codes.......................................................................................... 76
Troubleshooting .................................................................................. 77
Finishing the Installation .................................................................... 79
Installation Checklist .......................................................................... 80
Device Conguration Worksheet....................................................... 82
Who to Call for Assistance ................................................................. 83
TABLE OF CONTENTS
3

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4
MULTI V Hydro Kit Installation Manual
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Safety Precautions
•Please read this manual completely before installing the product.
•As an installer or service provider, it is your job to install or service the system to operate safety and efficiently. Improper installation, ad-
justment, alteration, service, or maintenance is dangerous to personnel and/or property and can void the warranty.
•Follow the instructions in this manual to prevent product malfunction, property damage, injury or death to the user or other people.
Incorrect operation due to ignoring any instructions will cause harm or damage.
•The level of seriousness is classified by the symbols described below.
Roughing-In
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 may result in personal
injuries or death from oxygen depletion.
Do not install, remove, or re-install the unit by yourself
(customer).
There is risk of re, electric shock, physical injury or death.
Ask the dealer or an authorized technician to install the unit.
Improper installation by the user may result in water leaks, re, electric
shock, physical injury or death.
For re-installation, always contact the dealer or an authorized
service provider.
There is risk of re, electric shock, physical injury or death.
Be very careful when transporting the unit.
• Indoor unit weight and size preclude one person carrying the unit.
Use two or more people to transport the unit without the assis-
tance of mechanical transport equipment because there is a risk of
personal injury.
• Some products use polypropylene bands for packaging. Do not use
polypropylene bands to lift the unit.
• Suspend the water source unit from the base at specified positions.
Support the outdoor unit a minimum of four points to avoid slippage
from rigging apparatus.
Do not handle indoor units without the use of gloves and
protective clothing. The unit may have sharp edges.
There is a risk of personal injury.
Dispose the packing materials safely.
Destroy the structure of plastic packaging and boxes to prevent children
from playing with them. There is a risk of injury, suffocation and/or death
to humans, animals and wildlife.
Do not install the unit on an unstable structure.
It may result in the failure of the structure, property damage, equipment
damage, and/or personal injury or death.
Install the unit in a safe location where nobody can step on
or fall onto it.
There is risk of unit damage, physical injury or death.
R410A and R134a refrigerants create toxic gases when
burned. Do not store or use ammable products near the
unit.
There is risk of product failure, re, and physical injury or death.
Replace all control box and panel covers after completing
work.
Failure to do so may result in dust or water inltration, causing re, electric
shock, and physical injury or death.
Always wear safety glasses and work gloves when installing
the unit. A rapid release of R410A and R134a refrigerants may
cause frostbite.
SAFETY PRECAUTIONS
IMPORTANT!
This symbol indicates a potentially hazardous situation which, if not avoided, may result in death or serious injury.
This symbol indicates a tip or recommendation.
Recommendations instruct the user to apply the suggested practice to ensure the best operating results in order to achieve the
maximum benet of the product.
Tips contain practical information that may help the user solve a problem or describe actions that may save time.
This symbol indicates additional helpful information such as an explanation, a comment, or a clarication about the subject.

Due to our policy of continuous product innovation, some specications may change without notication.
©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
6
MULTI V Hydro Kit Installation Manual
SAFETY PRECAUTIONS
Power Wiring and Communications Cabling
The information contained in this manual is intended for use
by a qualied, experienced service technician who is familiar
with safety procedures and equipped with the proper tools
and test instruments.
Failure to carefully read and follow all instructions in this manual
may result in equipment malfunction, property damage, personal injury
or death.
Always use lock-out, tag-out procedures!
Ensure the electrical power is off and the disconnect is locked and tagged
prior to working on the Hydro Kit.
All electric work must be performed by a licensed electrician
and conform to local building codes or, in the absence of lo-
cal codes, with the National Electrical Code, and the instruc-
tions given in this manual.
If the power source capacity is inadequate or the electric work is not
performed properly, it may result in re, electric shock, physical injury or
death.
This equipment uses high voltage electricity. Only a qualied,
experienced electrician should wire this system. Never
assume that the electrical power has been disconnected.
Verify with a meter.
Failure to properly respect electricity, use industry best grounding prac-
tices, follow suggested wiring instructions, local, and NEC codes can lead
to electrical shock, physical injury, seizures, and death.
Refer to local, state, and federal codes, and use power wires
of sufcient current capacity and rating.
Wires that are too small may generate heat and cause a re.
Use a properly sized circuit protective device. Using an under-
sized protective device will lead to equipment malfunction. In-
stalling an oversized protective device may cause burns, re,
and death.
There is risk of re, electric shock, explosion, physical injury or death.
Always ground the unit following local, state, and NEC codes.
There is risk of re, electric shock, and physical injury or death.
Do not use a eld-provided communications cable between
the Hydro Kit and the Hydro Kit Wall Mounted Controller. Use
only LG provided communications cable. Do not shorten,
modify, lengthen, or remove factory plug-able connectors
from the communications cable provided with the Hydro Kit
Wall Mounted Controller wiring kit. The product will malfunction.
Verify all power, ground, and communications wires and
cables are properly terminated before applying power to the
product. Securely tighten all wire terminations.
Improper and/or loose wire and communications cable terminations may
cause product malfunction, re, physical injury or death.
Properly secure power wires and communications cables
at connectors, and provide slack in cable to eliminate wire
strain.
Inadequate connections may generate heat or cause a re and result in
physical injury or death.
Turn power off at the unit disconnect before servicing.
Electrical shock can cause physical injury or death.
Properly insulate all cold surfaces when installing this product.
Uninsulated cold surfaces may generate condensate that may drip and
cause water damage to wall and oors.
This product is engineered to be used for comfort cooling /
heating. It is not to be used in applications that require
precision cooling or heating such as data centers, food
preservation, wine coolers, refrigeration and / or freezer
applications.
There is risk of property damage.
Provide eld-installed electrical isolation devices to protect
sensitive equipment sharing a power source with this product.
Provide sufcient protection against the effects of
electromagnetic elds (EMF) and electrical noise.
Inverter equipment, private power generators, high-frequency
medical equipment, or radio communication equipment may cause the
air conditioner to malfunction.
Install the unit considering the potential for earthquakes.
Improper installation may cause the unit to fall over, resulting in physical
injury or death.
Do not install this product in a location that is noise
sensitive. Provide additional acoustical treatment as needed.
The risk is occupants may be discomforted.
Provide sufcient electrical system protection against
lighting strikes.
The risk is loss of warranty, product damage, and / or complete loss of
this product.
When installing refrigerant piping, consider pipe expansion.
Improper pipe installation may lead to pipe fatigue, failure, and a rapid
release of refrigerant, frostbite, suffocation, physical injury, and or death.
Roughing-In — Continued

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Safety Precautions
Always use lock-out, tag-out procedures!
Ensure the electrical power is off and the disconnect is locked and tagged
prior to working on the Hydro Kit.
Verify the piping system has been properly evacuated
(<500 ppm), and the system’s refrigerant charge is correct
before commissioning and after any repair is made.
Improper system evacuated and/or an improper refrigerant charge may
cause product malfunction.
Do not install the units outside.
There is risk of re, electric shock, explosion, and 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
specied by LG are used, there is risk of re, electric shock, explosion,
and physical injury or death.
Do not store or use ammable gas or combustibles near the
unit.
There is risk of product failure, re, explosion, and 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 outdoor unit, causing re, electric shock, and physical injury or
death.
Always check for system refrigerant leaks after the unit has
been installed or serviced.
Low refrigerant levels may cause product failure, and exposure to high
concentration levels of refrigerant gas may lead to illness or death.
SAFETY PRECAUTIONS
Installation
Hydro Kit High Temperature Water Heater (K3) must be kept
in an upright position during installation.
To avoid oil migration from the onboard compressor..
Do not make refrigerant substitutions. Use the refrigerant
listed on the nameplate of the unit.
If a different refrigerant is used, or air mixes with original refrigerant, the
unit will malfunction and be damaged.
Take appropriate actions at the end of HVAC equipment life
to recover, recycle, reclaim or destroy refrigerants
according to applicable U.S. Environmental Protection
Agency (EPA) rules.
Wiring Precautions
Turn the power off at the nearest disconnect before servicing
the equipment.
Electrical shock can cause physical injury or death.
Do not supply power to the unit until all electrical wiring,
controls wiring, piping, installation, and refrigerant system
evacuation are completed AND the commissioning agent has
authorized you to do so.

Due to our policy of continuous product innovation, some specications may change without notication.
©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
8
MULTI V Hydro Kit Installation Manual
Do not allow water, dirt, or animals to enter the (Hydro Kit)
unit.
There is risk of unit failure, re, electric shock, physical injury or death.
Do not provide power to or operate the unit if it is ooded or
submerged.
There is risk of re, electric shock, physical injury or death.
Do not operate the disconnect switch with wet hands.
There is risk of re, electric shock, physical injury or death.
Periodically verify the equipment mounts have not
deteriorated.
If the base collapses, the unit could fall and cause property damage, prod-
uct failure, physical injury or death.
Do not touch the refrigerant piping during or after operation.
It can cause burns or frostbite.
Do not operate the unit with the panel(s) or protective
cover(s) removed; keep ngers and clothing away from
moving parts.
The rotating, hot, cold, and high-voltage parts of the unit can cause physi-
cal injury or death.
If a refrigerant gas leak is detected, leave the room!
Refrigerant gas in sufcient quantity in an enclosed area can cause suf-
focation and death. Obtain a properly maintained Self Contained Breath-
ing Apparatus (SCBA) and training on how to use it before reentering the
area
For the High Temperature Heating Model (K3), turn on the
power at least six (6) hours before operation begins.
Starting operation immediately after turning on the main power switch can
result in severe damage to the compressor(s). Keep the power switch on
during the operational season.
Clean up the site after servicing is nished, and check that
no metal scraps, screws, or bits of wiring have been left
inside or surrounding the Hydro Kit.
Operation and Maintenance
SAFETY PRECAUTIONS

9
Introduction
Due to our policy of continuous product innovation, some specications may change without notication.
©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
Hydro Kit Models
This manual describes how to install the Multi V™ Hydro Kit. The Hydro Kit is available in two models. Refer to Table 1 for model chassis,
model number and capacities.
Table 1: Hydro Kit Model Numbers and Capacities
Unit Chassis Name Model Number Capacity
Hydro Kit Medium Temperature K2 ARNH963K2A2 Cooling: 95,900 Btu/h
Heating: 107,500 Btu/h
Hydro Kit High Temperature K3 ARNH763K3B2 Heating Only: 86,000 Btu/h
These units are to be used in conjunction with LG’s Multi V Variable Refrigerant Flow (VRF) Heating, and Air Conditioning system. Both units
operate on 208–230 V, 60 Hz, 1-phase power.
Install these unit(s) in the location(s) specied by your design engineer, HVAC system layout drawings and project specications. Perform the instal-
lation according to the procedures in this manual. Improper installation may result in injury to or death of personnel, equipment malfunction and/or
property damage.
More in-depth technical and performance information on these units is available in the Multi V™ Hydro Kit Engineering Manual available at
http://www.lg-vrf.com.
INTRODUCTION
HydroKit Medium Temperature (K2) HydroKit High Temperature (K3)

10
MULTI V Hydro Kit Installation Manual
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©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
HydroKit Nomenclature
ARN H96 3K2 A
Generation
2 = Second
Electrical Ratings
3 = 208–230V/60Hz/1Ph
96 = 107,500
76 = 86,000
Type
H = Hydro Kit
Family
ARN = Multi V Indoor Unit
(Refrigerant R410A)
2
K2 = Hydro Kit Medium Temperature
K3 = Hydro Kit High Temperature
Combination of functions
A = Standard
B = High Temperature Water Heater
Nominal Capacity
Chassis
(Total Heating Capacity in Btu/h)
NOMENCLATURE

11
Introduction
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Table 2: Hydro Kit Product Features.
UNIT FEATURES
Table 2 compares main features of the two Hydro Kit models.
Features ARNH963K2A2 ARNH763K3B2
Controller Based Functions
Self diagnosis √ √
Auto Start √ √
*Manual or Auto Restart √ √
Child Lock √ √
Group Control1√ √
Timer (on/off)2X√
Timer (weekly)2X√
BMS Integration
Hydro Kit Wall Mounted
Controller √ √
Network Solution (LGAP) √ √
Remote Enable/Disable via
LG Dry Contact3PQDSB-1 PQDSB-1
Power Distribution
Indicator (PDI) Interface X√
Options
Remote Temperature
Sensor PQRSTA0 PQRSTA0
Solar Heating Circuit
Interface1PHLLA X
Features ARNH963K2A2 ARNH763K3B2
Hydro Kit Based Functions
Hydronic Circuit Isolation √X
Water Pump ON/ OFF
Control √ √
Factory Mounted Flow
Switch √ √
Conventional line voltage
(208-230° v) Thermostat
Interface2
√ √
Conventional 24 vac
Thermostat Interface2√X
Conventional Mechanical
Thermostat Interface1√ √
Indirect Tank Water
Pre-Heating √ √
3rd Party Solar Heating
System Flow Control √X
Storage Tank Heating
Operation Timer √ √
Water Temperature Reset √ √
Overheating Protection √ √
Emergency Heating
Operation √ √
√:Available
X: Not available
KEY:
Hydro Kit Compatibility
The Hydro Kit is fully compatible with Multi V III, Multi V IV and Multi V Water IV units. The Hydro Kit is not compatible with Multi V Mini, Multi
V Plus II, Multi V Sync II, Multi V Space, Multi V Water II, Multi V Water Mini or any duct-free split products.
1Hydro Kit models (i.e., K2 and K3 chassis) cannot be mixed within the same group. Each Hydro Kit unit group must be connected to the same outdoor unit.
Hydro Kit units within the same group must have the same DIP switch settings. The only DIP switch that can differ is the group control setting switch, where
one Hydro Kit will be the master and the remaining Hydro Kit units will be slaves.
2Manual restart is not available when the Hydro Kit is configured for conditioned space control, using a conventional thermostat.
3Sold separately and field installed.

12
MULTI V Hydro Kit Installation Manual
Due to our policy of continuous product innovation, some specications may change without notication.
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Hydro Kit Medium Temperature — K2
Hydro Kit High Temperature — K3
Heating Circuit Water Outlet Connection
Communication Cable Knock-out
Power Wire Knock-out
R-410a Low Pressure Vapor Pipe
R-410a High Pressure Liquid Pipe
Heating Circuit Water Inlet Connection
Hydronic Circuit Water Outlet Connection
R-410a Low Pressure Vapor Pipe Connection
R-410a High Pressure Vapor
Liquid Pipe Connection
Condensate Drain Pipe
Hydronic Circuit Water Inlet Connection
Communication Cable Knock-out
Power Wire Knock-out
Figure 1: Medium Temperature (K2) Unit Connections
Figure 2: High Temperature (K3) Unit Connections
UNIT PIPE, WIRE AND CABLE
CONNECTION
The following diagrams display all piping and cable routing locations on the two chassis.

13
Introduction
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©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
Table 3 lists installation parts for the K2 and K3 models of the Hydro Kit. Be sure all field-provided parts meet appropriate local and national
codes. Quantities are per each unit installed.
Table 3: Parts and Accessories Provided for each Hydro Kit
Part Quantity Part Image
Installation Manual (this manual) 1 n/a
Hydro Kit Remote Control Panel 1
Sensor Well 1
Indirect Hot Water Storage Tank
Sensor 1
Refrigerant Strainer 1
Independent Power Module 1
Optional Accessories
Table 4 lists additional optional accessories available through LG Electronics.
Table 4: Optional Accessories Available from LG Electronics
Part Model Description
Remote Wall Mounted Sensor PQRSTA0 Control via the Hydro Kit based on
conditioned space temperature.
Dry Contact PQDSB-1 Binary closure- Remote Enable/Disable.
Solar Heating System
Interface Kit PHLLA Solar heating system interface.
Installation Parts
PARTS

14
MULTI V Hydro Kit Installation Manual
Due to our policy of continuous product innovation, some specications may change without notication.
©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
SPECIFICATIONS
Type ARNH963K2A2 ARNH763K3B2
Power Supply (V/Hz/Ph) 208-230/60/1 208-230/60/1
Rated Cooling Capacity (Btu/h) 95,900 n/a
Rated Heating Capacity (Btu/h) 107,500 86,000
Nominal Dimensions W x D x H (In) 21 x 25 x 13 21 x 43 x 13
Net Weight (lbs) 78 208
Shipping Weight (lbs) 89 219
Type Brazed Plate Heat
Exchanger
Brazed Plate Heat
Exchanger
Refrigerant
to Water Heat Exhanger
Rated Water
Flow (GPM)
24.3 9.5
Pressure Drop (ft-wg) 23.1 7
Water Pipe Connections Inlet Diameter 1” MPT 1” MPT
Outlet Diameter 1” MPT 1” MPT
Refrigerant Pipe
Connections
Liquid ODU (in) 3/8 3/8
Vapor Gas ODU (in) 7/8 3/4
Drain Connection 1” MPT 1” MPT
Multi V ODU Comm. Cable
(AWG -# Conductors, type)
18-2 stranded shielded 18-2 stranded shielded
Hydro Kit Wall Mounted Controller
Communication Cable
Use LG supplied cable only Use LG supplied cable only
Internal Circuit
Refrigerant Type - R410A
Control Device - Electronic Expansion Valve
Multi V System
Refrigerant Type R410A R134a
Refrigerant
Charge (lbs)
- 6.6
Control Device Electronic Expansion Valve Electronic Expansion Valve
Table 5 lists specifications for each Hydro Kit chassis (K2 and K3). Note that due to the functionality of each Hydro Kit some types of specs
will not be available on certain unit models.
Table 5: HydroKitSpecications

15
Introduction
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©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
DIMENSIONS
Figure 3 shows the dimensional diagram of the Hydro Kit Medium Temperature, along with piping and cabling information.
Hydro Kit - K2
Figure 3: Dimensions for Hydro Kit — K2

16
MULTI V Hydro Kit Installation Manual
Due to our policy of continuous product innovation, some specications may change without notication.
©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
DIMENSIONS
Figure 4 shows the dimensional diagram of the Hydro Kit High Temperature, along with piping and cabling information.
Hydro Kit - K3
Figure 4: Dimensions for Hydro Kit (K3)

17
Introduction
Due to our policy of continuous product innovation, some specications may change without notication.
©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
Figure 5 shows the wiring diagram for the Hydro Kit Medium Temperature.
WIRING
Figure 5: Wiring for Hydro Kit (K2 Chassis)
Hydro Kit - K2
(USE COPPER WIRE ONLY)
208-230V/60/1
208/230V
24V Transformer Water Pump
Pilot Relay
A
B
*For 24V thermostat disconnect housting A and C then connect housing B and C
*
**
F
ield Connections - LG Sourced Accessories
CN-ROOM
CN-REMO
CN-CC
CN-TH4 (TOP)
CN-TH4 (BOTTOM)
CN-EEV
CN-WRITE
CN-EEV/LOAD
LG remote temperature sensor (optional)
Remote mounted Hydro Kit unit controller
LG Dry Contact PCB interface (3rd party
binary signal enabe/disable
LG Solar Kit temperature sensor for
secondary heated water storage tank
LG provided hot water tank temperature
sensor
5-wire harness from power module accessory
CN-EEV/MAIN to CN-EEV on the Hydro Kit
MAIN PCB
Single wire from power module accessory
CN-EEV/MAIN to Hydro Kit MAIN PCB
CN-WRITE
Wire harness from power module accessory
to Hydro Kit EEV valve
NOTE: If a 24 volt thermostat will be used, adjust wiring
harness conguration
Wire Harness A
Wire Harness B
Wire Harness C
PCB interface 208-230/60/1 or
mechanical conventional thermostat
PCB interface for 24VAC conventional
thermostat
Wire harness Plug C to conventional
thermostat terminals 18, 19, 20
Sockets and Connections+
CN-2WAY (A)
CN-2WAY (B)
CN-3WAY (A)
CN-3WAY (B)
CN-CC
CN-COM
CN-EEV
CN-FLOW1
To terminal strip B, screws 14, 15, 16
Not used
To terminal strip A, screws 8, 9, 10
To terminal strip A, screws 1, 2, 3
Optional LG Dry Contact connection
Multi V communication to outdoor or water
source unit
R410A EEV value
Factory mounted ow switch
CN-FLOW2 Not used
CN-FLOW3-4 Not used
CN-OPTION Option card interface
CN-PIPEIN Heat exchanger - refrigerant pipe in
temperature
CN-PIPEOUT Heat exchanger - refrigerant pipe out
temperature
CN-POWER AC power to PCB
CN-REMO Hydro Kit unit controller
CN-ROOM LG Remote Temperature Sensor (optional)
CN-TH3(TOP/LEFT) Heat exchanger-inlet water temperature
sensor
CN-TH3(BOTTOM/
CENTER)
Heat exchanger-outlet water temperature
sensor
CN-TH4(TOP) Temperature sensor: Solar heating circuit
temperature sensor (optional)
CN-TH4(BOTTOM) Temperature sensor: Hot water storage tank
sensor (eld mounted)
CN-THM01 3rd Party 208-230/60/1 thermostat (option)
CN-THM02 3rd Party 24VAC thermostat (option)
CN-TRANS 24 Volt power to PCB
CN-W/PUMP (A)To terminal strip B, screws 11, 12: Solar
heating system circulating pump
CN-W/PUMP (B) To terminal strip A, screws 4,5: Solar heating
system circulating pump
CN-WRITE Not used
EARTH Earth Ground
Line (+) power connection 208-230/60/1
Neutral (-) power connection 208-230/60/1
L
N
Ground
Thermistor
Fuse
TERMINAL STRIP SCREW TERMINALS
A
A
A
A
B
B
B
B
1, 2, 3
4,5
6,7
8, 9, 10
11, 12
13
14, 15, 16
17, 18, 19, 20
Field Supplied Connections
Wi
re Color Legend
BK Black
BL Blue
BrownBR
GR Green
RD Red
YL Yellow
WH White

18
MULTI V Hydro Kit Installation Manual
Due to our policy of continuous product innovation, some specications may change without notication.
©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
Figure 6 shows the wiring diagram for the High Temperature Heating Hydro Kit.
WIRING
Figure 6: Wiring for Hydro Kit (K3 Chassis)
Hydro Kit - K3
(USE COPPER WIRE ONLY)
208-230/60/1
208/230V
R-134A Inverter
Compressor
RS 485
Communication Board
Crankcase
Heater
Inverter PCB
Cooling Fan
MAIN PCB
Field Connections - LG Sourced Accessories
Sockets and Connections - Main PCB
CN-3WAY (A)
CN-CC
CN-COM
CN-CC
CN-COM
CN-EEV
CN-FLOW1
To terminal strip A, screws 4,5,6
Optional LG Dry Contact connection
Multi V communication to outdoor or water
source unit
Optional LG Dry Contact connection
Multi V communication to outdoor or water
source unit
R410A EEV value
Factory mounted ow switch
CN-FLOW3-4 Power to RS-484 communications PCB
CN-OPTION Option card interface
CN-PIPEIN Heat exchanger - refrigerant pipe in
temperature
CN-PIPEOUT Heat exchanger - refrigerant pipe out
temperature
CN-POWER AC power to PCB
CN-REMO Hydro Kit unit controller
CN-ROOM LG Remote Temperature Sensor (optional)
CN-TH3(TOP/LEFT) Heat exchanger-inlet water temperature
sensor
CN-TH3(BOTTOM/
CENTER)
Heat exchanger-outlet water temperature
sensor
CN-TH4(TOP) Not used
CN-TH4(BOTTOM) Hot water storage tank sensor (eld
mounted)
CN-THM01 To terminal strip A, screws 7,8,9,10
CN-WRITE
EARTH Earth Ground
CN-DC Communications link with inverter board
TERMINAL STRIP SCREW TERMINALS
A
A
A
A
1, 2
3
4,5,6
7,8, 9, 10
Field Supplied Connections
Wire Color Legend
BK Black
BL Blue
BrownBR
GR Green
RD Red
YL Yellow
WH White
Not used
Sockets and Connections - Inverter and Other PCB’s
CN-COOLING
CN-Heater1
CN-N/F
AC (N)
AC (L)
W, U, V
CN-EEV1
Inverter PCB cooling fan
R134A compressor crankcase heater
Filtered power to inverter
Line power neutral
Line power 208-230/60/1
Inverter compressor connection
R134A circuit EEV
CN-485/DRY Communications link
P-SENSOR (L)
Power to noise lter
P-SENSOR (H) R134A high pressure sensor
CN-TH3 R134A compressor discharge pipe
thermistor
CN-TH2 R134A compressor suction pipe thermistor
CN-INVERTER
R134A low pressure sensor
Ground
Thermistor
Fuse
CN-ROOM
CN-REMO
CN-CC
CN-TH4 (BOTTOM)
LG remote temperature sensor (optional)
Remote mounted Hydro Kit Unit Controller
LG Dry Contact PCB interface (3rd party
binary signal enable/disable
Temperature sensor: Hot water storage tank
sensor (eld mounted)
A

19
Installation
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 Life’s Good” is a registered trademark of LG Corp.
Choose a location in the vicinity of the installation before removing the protective materials.
After opening, if the unit is damaged, repack the unit as it was shipped to you. 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. Call your supervisor on how to proceed with ling a
freight claim and to order a replacement unit.
1. Before opening, check the unit model number on the box. Verify it is the correct capacity, unit type and voltage. Refer to Nomenclature
Chart on page 10 of this manual.
2. Place the box on a solid surface right side up.
3. Cut the white reinforced nylon straps.
4. Open the top of the box and fold back all four flaps.
5. Remove the protective cardboard.
6. The walls and top panels are not attached to the bottom of the box. Lift the cardboard carton by the flaps and remove the box walls and
top and place it to the side.
7. Remove the moisture barrier plastic bonnet.
8. Check the unit nameplate data and model number. Verify the unit voltage, and capacities are correct before proceeding.
9. Remove and retain the installation manual. It is located under the unit, on top of the unit, or taped and inserted inside the unit cabinet.
10. Lift the unit (but not by refrigerant piping!) and inspect for freight damage. If damage is found, repack the unit as it was received in the
original container.
DO NOT lift the unit by the refrigerant piping. Use the hanger brackets or the unit case only to lift the unit. Damage to the piping components may occur.
Location Selection
Select a location for installing the unit where:
•The location is indoors in a conditioned space and protected from outdoor weather events.
•The mounting structure will support the weight of the unit(s), piping, and accessories.
•The unit is level.
•Space is allocated for heat exchanger maintenance and draining.
•Space is allocated for the connection of necessary piping.
•Proper electrical panel clearance requirements are satisfied.
•The unit is not exposed to steam, humid air, caustic, and/or acidic
chemical vapors such as but not limited to Chlorine or Muratic acid.
•Provide minimum maintenance clearance and electrical component service areas as shown in Figure 7
•Refer to Table 6 for clearance measurements specific to each chassis.
ROUGHING-IN
Unpack the Indoor Unit / Inspect for Freight Damage

20
MULTI V Hydro Kit 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 Life’s Good” is a registered trademark of LG Corp.
Figure 7: Minimum Clearance Areas Around Units
Match Letter
Clearance Area
to Corresponding
Hydro Kit Chassis
K2 Chassis
Roughing-In the Hydro Kit Chassis
Match Letter
Clearance Area to
Corresponding
Hydro Kit Chassis
K3 Chassis
Table 6: Hydro Kit Minimum Clearance Dimension in Inches
Hydro Kit
Chassis
Maintenance Ventilation Piping / Heat Exchanger Pull
A B C E F G H I J K
K2 20-1/2 24 --- --- --- --- 13-1/2 825
K3 20-1/2 24 42-1/2 13-1/2 3-1/2 10-1/2 32 13-1/2 14 27
ROUGHING-IN