LG Multi V PRHR023 User manual

INSTALLATION MANUAL
AIR
CONDITIONER
www.lg.com
MFL32987320
Rev.01_011719
Please read this installation manual completely before installing the product.
Installation work must be performed in accordance with the national wiring
standards by authorized personnel only.
Please retain this installation manual for future reference after reading it thoroughly.
[ Representative ] LG Electronics Inc. EU Representative : LG Electronics European Shared Service Center B.V.
Krijgsman 1, 1186 DM Amstelveen, The Netherlands
[ Manufacturer ] LG Electronics Inc. Changwon 2nd factory 84, Wanam-ro, Seongsan-gu, Changwon-si,
Gyeongsangnam-do, KOREA
PRHR083/PRHR063/PRHR043/PRHR033/PRHR023 (Heat Recovery Unit)
Original instruction
Copyright © 2017 - 2019 LG Electronics Inc. All Rights Reserved.
ENGLISH ITALIANO ESPAÑOL FRANÇAIS DEUTSCH
ΕΛΛΗΝΙΚΆ
ČEŠTINA
NEDERLANDS
POLSKI
LIMBA ROMÂNĂ
РУССКИЙ ЯЗЫК
УКРАÏНСЬКА
ҚАЗАҚ ТІЛІ
БЕЛАРУСКАЯ МОВА
O‘ZBEK TILI

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

IMPORTANT SAFETY INSTRUCTIONS 3
ENGLISH
IMPORTANT SAFETY INSTRUCTIONS
READ ALL INSTRUCTIONS BEFORE USING THE APPLIANCE.
Always comply with the following precautions to avoid
dangerous situations and ensure peak performance of your
product
WARNING
It can result in serious injury or death when the directions are
ignored
CAUTION
It can result in minor injury or product damage when the
directions are ignored
WARNING
• Installation or repairs made by unqualified persons can result
in hazards to you and others.
• The information contained in the manual is intended for use
by a qualified service technician familiar with safety
procedures and equipped with the proper tools and test
instruments.
• Failure to carefully read and follow all instructions in this
manual can result in equipment malfunction, property
damage, personal injury and/or death.
WARNING
• Have all electric work done by a licensed electrician according
to "Electric Facility Engineering Standard" and "Interior Wire
Regulations" and the instructions given in this manual and
always use a special circuit.
- If the power source capacity is inadequate or electric work is
performed improperly, electric shock or fire may result.
• Ask the dealer or an authorized technician to install the HR
unit.
- Improper installation by the user may result in water
!
!
!
!

4IMPORTANT SAFETY INSTRUCTIONS
ENGLISH
leakage, electric shock, or fire.
• Always ground the product.
- There is risk of fire or electric shock.
• Make the connections securely so that the outside force of
the cable may not be applied to the terminals.
- Inadequate connection and fastening may generate heat and
cause a fire.
• For re-installation of the installed product, always contact a
dealer or an Authorized Service Center.
- There is risk of fire, electric shock, explosion, or injury.
• Do not install, remove, or re-install the unit by yourself
(customer).
- There is risk of fire, electric shock, explosion, or injury.
• Do not store or use flammable gas or combustibles near the
HR Unit.
- There is risk of fire or failure of product.
• Use the correctly rated breaker or fuse.
- There is risk of fire or electric shock.
• Do not damage or use an unspecified power cord.
- There is risk of fire, electric shock, explosion, or injury.
• Do not touch the power switch with wet hands.
- There is risk of fire, electric shock, explosion, or injury.
• Securely install the cover of control box and the panel.
- If the cover and panel are not installed securely, dust or
water may enter the HR unit and fire or electric shock may
result.
• Be cautious when unpacking and installing the product.
- Sharp edges could cause injury. Be especially careful of the
case edges.
• Safely dispose of the packing materials.
- Packing materials, such as nails and other metal or wooden
parts, may cause stabs or other injuries.
- Tear apart and throw away plastic packaging bags so that
children may not play with them. If children play with a
plastic bag which was not torn apart, they face the risk of
suffocation.

5
IMPORTANT SAFETY INSTRUCTIONS
ENGLISH
CAUTION
• Avoid a place where rain may enter since the HR unit is for
indoor.
- There is risk of property damage, failure of product, or
electric shock.
• Do not install a HR unit in a space where persons exists such
as living room, office or meeting room with not only low but
also open ceiling.
• Always check for gas (refrigerant) leakage after installation or
repair of product.
- Low refrigerant levels may cause failure of product.
• Keep level even when installing the product.
- To avoid vibration or water leakage.
• This appliance is not intended for use by persons (including
children) with reduced physical, sensory or mental capabilities
or lack of experience and knowledge, unless they have been
given supervision or instruction concerning use of the
appliance by a person responsible for their safety.
- Children should be supervised to ensure that they do not
play with the appliance.
• Means for disconnection must be incorporated in the fixed
wiring in accordance with the wiring rules.
!

6
TABLE OF CONTENTS
ENGLISH
2TIPS FOR SAVING ENERGY
3IMPORTANT SAFETY INSTRUCTIONS
7FEATURES
9INSTALLATION PART
10 INSTALLATION
10 Selection of the best location
10 Dimensional drawings
13 HR Unit Installation
16 Insulation
17 Wiring Connection
18 HR Unit PCB
19 Setup the switch of HR Unit
26 COIL EXCHANGING METHOD
27 JOINT METHOD OF HR UNIT
TABLE OF CONTENTS

FEATURES 7
ENGLISH
FEATURES
Control Box
Connection Pipe
(to outdoor unit)
Connection Pipe
(to outdoor unit)
Connection Pipe
(to indoor unit)
Model
Max. Connectable No. of Indoor Units
Max. Connectable No. of Indoor Units of a branch
Nominal Input Cooling [W]
Heating [W]
Net. Weight kg
lbs
Dimensions
(WxHxD)
mm
Inch
Casing
Connecting
Pipes
Indoor side Liquid Pipe [mm]
Gas Pipe [mm]
Outdoor side
Liquid [mm]
Low Pressure
[mm]
High Pressure
[mm]
Sound Absorbing Insulation Material
Current Minimum circuit Amps(MCA)
Maximum fuse Amps(MFA)
Power Supply
PRHR023 PRHR033 PRHR043
16 24 32
88 8
39.8
37.2
14.9 16.7 18.2
32.8 36.8 40.1
786 X 218 X 657
30.9 X 8.6 X 25.9
Galvanized steel plate
Ø 9.52 – Ø 6.35
Ø 15.88 – Ø 12.7
Ø 9.52 Ø 12.7 Ø 15.88
Ø 22.2 Ø 28.58 Ø 28.58
Ø 19.05 Ø 22.2 Ø 22.2
Polyethylene Foam
0.17
15
220-240 V~ 50/60 Hz

8FEATURES
ENGLISH
Control Box
Connection Pipe
(to outdoor unit)
Connection Pipe
(to outdoor unit)
Connection Pipe
(to indoor unit)
Model
Max. Connectable No. of Indoor Units
Max. Connectable No. of Indoor Units of a branch
Nominal Input Cooling [W]
Heating [W]
Net. Weight kg
lbs
Dimensions
(WxHxD)
mm
Inch
Casing
Connecting
Pipes
Indoor side Liquid Pipe [mm]
Gas Pipe [mm]
Outdoor
side
Liquid [mm]
Low Pressure [mm]
High Pressure [mm]
Sound Absorbing Insulation Material
Current Minimum circuit Amps(MCA)
Maximum fuse Amps(MFA)
Power Supply
PRHR063 PRHR083
48 64
88
75.9
72.1
27.2 30.7
60 67.7
1 113 X 218 X 657
43.8 X 8.6 X 25.9
Galvanized steel plate
Ø 9.52 – Ø 6.35
Ø 15.88 – Ø 12.7
Ø 15.88
Ø 28.58
Ø 22.2
Polyethylene Foam
0.27
15
220-240 V ~ 50/60 Hz

9
INSTALLATION PART
ENGLISH
INSTALLATION PART
- Installation Manual
- Hanging bolts (4 x M10 or M8), Nut(8 x M10 or M8), Flat washers(8 x M10)
- Reducers
MOD els High pressure
Gas pipe
Low pressure
Liquid pipe
HR unit
reducer
PRHR023 OD 22.2(7/8) Ø 19.05(3/4) Ø 15.88(5/8)
OD 19.05(3/4) Ø 15.88(5/8)
OD 12.7(1/2) Ø 9.52(3/8)
Ø 12.7(1/2)
OD 22.2(7/8) Ø 19.05(3/4) Ø 15.88(5/8)
OD 15.88(5/8) Ø 12.7(1/2)
OD 12.7(1/2) Ø 9.52(3/8)
PRHR033/
PRHR043/
PRHR063/
PRHR083
OD 19.05(3/4) Ø 15.88(5/8)
OD 28.58(1-1/8) Ø 22.2(7/8) Ø 19.05(3/4)
OD 15.88(5/8) Ø 12.7(1/2) Ø 9.52(3/8)
OD 15.88(5/8) Ø 12.7(1/2)
Ø 6.35(1/4)OD 9.52(3/8)
[Unit : mm(inch)]

10 INSTALLATION
ENGLISH
INSTALLATION
Selection of the best location
Select installation location of the HR unit suitable for following conditions
- Avoid a place where rain may enter since the HR unit is for indoor.
- Sufficient service space must be obtained.
- Refrigerant pipe must not exceed limited length.
- Avoid a place subject to a strong radiation heat from other heat source.
- Avoid a place where oil spattering, vapor spray or high frequency electric noise is expected.
- Install the unit at a place in which it is not affected by operation noise. (Installation within cell
such as meeting room etc. may disturb business due to noise.)
- Place where refrigerant piping, drain piping and electrical wiring works are easy.
Dimensional drawings
300 more
300 more
300 more
450 more
(Servicing space) (Servicing space)
(Servicing space) (Servicing space)
100 more
(Serviceing space)
500
7
311
1
2
3
100 more
(Serviceing space)
126
147
6
54
19 55
38992 176
Inspection door
(servicing space)
500
540
150 486 150
165
218
[Unit : mm]
PRHR023/PRHR033/PRHR043