LG PATX20A0E User manual

P/NO : MFL62049603 www.lg.com
INSTALLATION MANUAL
AIR CONDITIONER
• Please read this installation manual completely before installing the product.
• Installation work must be performed in accordance with the national wiring
standards by authorized personnel only.
• Please retain this installation manual for future reference after reading it
thoroughly.
TYPE : AHU EXPANSION KIT
Models : PATX13A0E PATX20A0E PATX25A0E
PATX35A0E PATX50A0E
ENGLISH

2AHU EXPANSION KIT
AHU EXPANSION KIT Installation Manual
TABLE OF CONTENTS
nSafety Precautions.............................................................3
n Installation Scene...............................................................5
n Supplies..............................................................................6
n EXPANSION KIT Installation .............................................7
n Mechanical installation ...............................................................................7
n Brazing work .............................................................................................10
n Pipe cutting work ......................................................................................11
n Thermistor connection..............................................................................12
n Leakage and vacuum test ...............................................15
n Leakage test.............................................................................................15
n Vacuum test..............................................................................................15
n Superheat Adjustment ............................................................... 16
n
EXPANSION KIT installation confirmation plate preparation ... 17

Safety Precautions
Installation Manual 3
ENGLISH
nInstallation
Safety Precautions
To prevent injury to the user or other people and property damage, the following instructions must be followed.
nIncorrect operation due to ignoring instruction will cause harm or damage. The seriousness is
classified by the following indications.
nMeanings of symbols used in this manual are as shown below.
WARNING
CAUTION
This symbol indicates the possibility of death or serious injury.
This symbol indicates the possibility of injury or damage.
Be sure not to do.
Be sure to follow the instruction.
WARNING
Do not use the existing manifold gauge for
R22 refrigerant.
• To charge the refrigerant stably, always
use the manifold gauge for high pressure
(R410A).
Install the air conditioner at a designated
location using the designated material.
• Heat exchanger inlet/outlet pipe location.
Do not store or use
flammable gas or volatile
substance near the air
conditioner.
• It can cause a fire or problem
to the product.
Do not mix existing R22 pipe
and installation products for
the installation.
• When you mix the mineral oil
of R22 and R410A oil (PVE), it
can decompose with water to
cause problems to the product.
Do not mix other refrigerant
with the designated
refrigerant (R410A) during
the installation or moving
the air conditioner.
• When other refrigerant is
mixed with the original
refrigerant, it can cause a
problem in the refrigerant cycle
and damage the product.
System air conditioner can
only be installed by
specialized service provider
with air condition
installation certifications.
• Inappropriate installation can
cause leakage, fire and
electric shock.
When moving or reinstalling
the air conditioner, please
contact the MULTI VTM AHU
installation service provider.
• Inappropriate installation can
cause leakage, fire and
electric shock.
Do not disassemble, repair
or reconfigure the product
arbitrarily.
• It can cause a fire and electric
shock.

Safety Precautions
4AHU EXPANSION KIT
nOperation
nInstallation
Do not install the air conditioner outdoors.
• If installed outdoor inevitably, consult MultiVTM
AHU installation service provider.
Do not let any worker or user climb on top of
the product.
• The person can get seriously injured.
Make sure that water does
not get inside the product
(Controller). Especially, do
not clean the product with
water.
• It can cause electric shock and
problems.
When the air conditioner is
submersed in water, always
consult MULTI VTM AHU
installation service provider.
• It can cause a fire and electric
shock.
Do not keep any heating
devices near the product.
• It can cause a fire.
After the product installation
and repair, always check for
gas leakage.
• It can cause problems in the
product.
When installing the product,
always make sure to level to
the product.
• It can cause vibration and
leakage.
Do not install the product
where flammable gas leaks.
• It can cause a fire and
problems to the product.
nOperation
If the refrigerant leaked while installing the product, always ventilate the room.
• The refrigerant gas can react with the fire to turn into hazardous gas to cause an accident.
CAUTION

Installation Manual 5
ENGLISH
Installation Scene
Installation Scene
Liquid pipe
Gas pipe
Refrigerant pipe
Thermistor
Communication line
Refrigerant flow (Cooling)
Refrigerant flow (Heating)
This EXPANSION KIT is the product connecting AHU and Outdoor unit configured as follows.
Installation components
No. Name Remarks
①Air Handling Unit
-
②EXPANSION KIT
Connectable outdoor unit capacity
PATX13A0E 8 ~ 16 HP
PATX20A0E 18 ~ 26 HP
PATX25A0E 28 ~ 36 HP
PATX35A0E 38 ~ 46 HP
PATX50A0E 48 ~ 56 HP
③
AHU control box -
④
Outdoor unit Multi-VTM
⑤
Thermistor IN Sensor: Ø5, Length: 10m, Line color: Black
⑥
Thermistor OUT Sensor: Ø7, Length: 10m, Line color: Red
⑦
⑧
90° Elbow
PATX13A0E ⑦: Ø15.88 ⑧: Ø22.22
PATX20A0E ⑦: Ø22.2 ⑧: Ø28.58
PATX25A0E ⑦: Ø28.58 ⑧: Ø34.92
PATX35A0E ⑦: Ø34.92 ⑧: Ø41.3
PATX50A0E ⑦: Ø34.92 ⑧: Ø41.3