LG ARUN050LMC0 User manual

P/NO : MFL70344401
INSTALLATION MANUAL
VRF FOR INDOOR
INSTALLAION
Original instruction
[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
For more information, Refer to the CD or LG Web site (www.lg.com).
AIR
CONDITIONER
www.lg.com
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.
Copyright © 2018 LG Electronics Inc. All Rights Reserved.
ENGLISH
ITALIANO ESPAÑOL
FRANÇAIS DEUTSCH
ČEŠTINA
ΕΛΛΗΝΙΚΆ
NEDERLANDS
POLSKI
LIMBA ROMÂNĂ
www.lgcomfortcooling.co.uk

2
ENGLISH
TIPS FOR SAVING ENERGY
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:
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.
Installation
• 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 air conditioner.
- Improper installation by the user may result
in water leakage, electric shock, or fire.
• Always ground the product.
- There is risk of fire or electric shock.
• Always intstall a dedicated circuit and
breaker.
- Improper wiring or installation may cause
fire or electric shock.
• 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 air conditioner.
- There is risk of fire or failure of product.
• Use the correctly rated breaker or fuse.
- There is risk of fire or electric shock.
• Prepare for strong wind or earthquake and
install the unit at the specified place.
- Improper installation may cause the unit to
topple and result in injury.
!
!
!
• 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 :
www.lgcomfortcooling.co.uk

3
ENGLISH
• Do not install the product on a defective
installation stand.
- It may cause injury, accident, or damage to
the product.
• Use a vacuum pump or Inert(nitrogen) gas
when doing leakage test or air purge. Do not
compress air or Oxygen and do not use
Flammable gases. Otherwise, it may cause
fire or explosion.
- There is the risk of death, injury, fire or
explosion.
• When installing and moving the air
conditioner to another site, do not charge it
with a different refrigerant from the
refrigerant specified on the unit.
- If a different refrigerant or air is mixed with
the original refrigerant, the refrigerant cycle
may malfunction and the unit may be
damaged.
• Do not reconstruct to change the settings of
the protection devices.
- If the pressure switch, thermal switch, or
other protection device is shorted and
operated forcibly, or parts other than those
specified by LGE are used, fire or explosion
may result.
• Ventilate before operating air conditioner
when gas leaked out.
- It may cause explosion, fire, and burn.
• 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
outside unit and fire or electric shock may
result.
• If the air conditioner is installed in a small
room, measures must be taken to prevent
the refrigerant concentration from
exceeding the safety limit when the
refrigerant leaks.
- Consult the dealer regarding the
appropriate measures to prevent the safety
limit from being exceeded. Should the
refrigerant leak and cause the safety limit
to be exceeded, harzards due to lack of
oxygen in the room could result.
• Means for disconnection must be
incorporated in the fixed wiring in
accordance with the wiring rules
• If the supply cord is damaged, it must be
replaced by the manufacturer, its service
agent or similarly qualified persons in order
to avoid a hazrd.
• This equipment shall be provided with a
supply conductor complying with the
national regulation.
Operation
• Do not damage or use an unspecified power
cord.
- There is risk of fire, electric shock, explosion, or
injury.
• Use a dedicated outlet for this appliance.
- There is risk of fire or electrical shock.
• Be cautious that water could not enter the
product.
- There is risk of fire, electric shock, or product
damage.
• Do not touch the power switch with wet hands.
- There is risk of fire, electric shock, explosion, or
injury.
• When the product is soaked (flooded or
submerged), contact an Authorized Service
Center.
- There is risk of fire or electric shock.
• Be cautious not to touch the sharp edges when
installing.
- It may cause injury.
• Take care to ensure that nobody could step on or
fall onto the outside unit.
- This could result in personal injury and product
damage.
• Do not open the inlet grille of the product during
operation. (Do not touch the electrostatic filter, if
the unit is so equipped.)
- There is risk of physical injury, electric shock, or
product failure.
• 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.
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4
ENGLISH
CAUTION
Installation
• Always check for gas (refrigerant) leakage after
installation or repair of product.
- Low refrigerant levels may cause failure of
product.
• Do not install the product where the noise or hot
air from the outside unit could damage the
neighborhoods.
- It may cause a problem for your neighbors.
• Keep level even when installing the product.
- To avoid vibration or water leakage.
• Do not install the unit where combustible gas
may leak.
- If the gas leaks and accumulates around the
unit, an explosion may result.
• Use power cables of sufficient current carrying
capacity and rating.
- Cables that are too small may leak, generate
heat, and cause a fire.
• Do not use the product for special purposes,
such as preserving foods, works of art, etc. It is a
consumer air conditioner, not a precision
refrigeration system.
- There is risk of damage or loss of property.
• Keep the unit away from children. The heat
exchanger is very sharp.
- It can cause the injury, such as cutting the
finger. Also the damaged fin may result in
degradation of capacity.
• When installting the unit in a hospital,
communication station, or similar place, provide
sufficient protection against noise.
-
The inverter equipment, private power
generator, high-frequency medical equipment,
or radio communication equipment may cause
the air conditioner to operate erroneously, or
fail to operate. On the other hand, the air
conditioner may affect such equipment by
creating noise that disturbs medical treatment
or image broadcasting.
• Do not install the product where it is exposed to
sea wind (salt spray) directly.
- It may cause corrosion on the product.
Corrosion, particularly on the condenser and
evaporator fins, could cause product
malfunction or inefficient operation.
Operation
• Do not use the air conditioner in special
environments.
- Oil, steam, sulfuric smoke, etc. can significantly
reduce the performance of the air conditioner or
damage its parts.
• Do not block the inlet or outlet.
- It may cause failure of appliance or accident.
• 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.
• Be sure the installation area does not deteriorate
with age.
- If the base collapses, the air conditioner could
fall with it, causing property damage, product
failure, or personal injury.
•
Install and insulate the drain hose to ensure that
water is drained away properly based on the
installation manual.
- A bad connection may cause water leakage.
• Be very careful about product transportation.
- Only one person should not carry the product if
it weighs more than 20 kg.
-
Some products use PP bands for packaging. Do
not use any PP bands for a means
of transportation. It is dangerous.
- Do not touch the heat exchanger fins. Doing so
may cut your fingers.
- When transporting the outside unit, suspending
it at the specified positions on the unit base.
Also support the outside unit at four points so
that it cannot slip sideways.
• 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.
• Turn on the power at least 6 hours before starting
operation.
- Starting operation immediately after turning on
the main power switch can result in severe
damage to internal parts. Keep the power
switch turned on during the operational season.
!
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5
ENGLISH
• Do not touch any of the refrigerant piping during
and after operation.
- It can cause a burn or frostbite.
• Do not operate the air conditioner with the panels
or guards removed.
- Rotating, hot, or high-voltage parts can cause
injuries.
• Do not directly turn off the main power switch
after stopping operation.
- Wait at least 5 minutes before turning off the
main power switch. Otherwise it may result in
water leakage or other problems.
•
Auto-addressing should be done in condition of
connecting the power of all indoor and outdoour
units. Auto-addressing should also be done in case of
changing the indoor unit PCB.
• Use a firm stool or ladder when cleaning or
maintaining the air conditioner.
- Be careful and avoid personal injury.
• Do not insert hands or other objects through the
air inlet or outlet while the air conditioner is
plugged in.
- There are sharp and moving parts that could
cause personal injury.
• This appliance can be used by children aged from
8 years and above and persons with reduced
physical, sensory or mental capabilities or lack of
experience and knowledge if they have been
given supervision or instruction concerning use of
the appliance in a safe way and understand the
hazards involved. Children shall not play with the
appliance. Cleaning and user maintenance shall
not be made by children without supervision.
TABLE OF CONTENTS
2TIPS FOR SAVING ENERGY
2IMPORTANT SAFETY INSTRUCTIONS
6INSTALLATION PROCESS
6OUTSIDE UNIT INFORMATION
6ALTERNATIVE REFRIGERANT R410A
7SELECT THE BEST LOCATION :
COMPRESSOR MODULE
7INSTALLATION SPACE : COMPRESSOR
MODULE
7SELECT THE BEST LOCATION : HEAT
EXCHANGER MODULE
7INSTALLATION SPACE : HEAT
EXCHANGER MODULE
8CARRYING METHOD
8INSTALLATION : COMPRESSOR
MODULE
8 The location of the Anchor bolts
8 Foundation for Installation
9INSTALLATION : HEAT EXCHANGER
MODULE
10 Heat Exchanger Module Installation
10 Method when insatalling the ducting
10 Method connect the refrigerant piping to the Heat Exchanger Module.
11 Checking the Drainage
11 Indoor Unit Drain Piping
11 Preparation of Piping
12 Plumbing materials and storage methods
12 REFRIGERANT PIPING INSTALLATION
12 Precautions on Pipe connection / Valve operation
13 TO CONNECT THE REFRIGERANT
PIPING TO THE COMPRESSOR MODULE
13 Preparation Work
13 Pipe Drawing Out
14 Refrigerant piping system
14 Selection of Refrigerant Piping
16 Refrigerant charging
16 Distribution Method
17 Branch pipe Fitting
18 Leak Test and Vacuum drying
19 Vacuum Mode
19 Thermal insulation of refrigerant piping
20 ELECTRICAL WIRING
20 Caution
21 Wiring of main power supply and equipment capacity
21 Control box and connecting position of wiring
21 Communication and Power Cables
22 Field Wiring
23 Checking the setting of outside units
23 Automatic Addressing
24 Group Number setting
24 Cool & Heat selector
24 Static pressure compensation mode
25 Night Low Noise Function
25 Setting the ODU address
25 Snow removal & rapid defrost
25 Target pressure adjusting
26 Self-Diagnosis Function
28 CAUTION FOR REFRIGERANT LEAK
28 Introduction
28 Checking procedure of limiting concentration
29 INSTALLATION GUIDE AT THE SEASIDE
29 Model Designation
29 Airborne Noise Emission
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6
ENGLISH
The foundation must be level even
Avoid short circuits and ensure
sufficient space is allowed for service
Refer to automatic addressing flowchart
Automatic addressing of indoor unit
In the final check for 24hours at 3.8 MPa(38.7 kgf/cm
2
) there
must be no drop in pressure.
Airtight test
Electrical work
(connection circuits and drive circuits)
Make sure no gaps are left where
the insulating materials are joined
Heat insulation work
Make sure airflow is sufficient
Duct work
Adjust to downward gradient
Drain pipe work
Special attention to dryness,
cleanness and tightness
Refrigerant piping work
Check model name to
make sure the fitting
is made correctly
Installation of indoor unit
Take account of gradient
of drain piping
Sleeve and insert work
Make connection clearly between outdoor, indoor,
remote controller and option.
Preparation of contract drawings
Indicate clearly who will be responsible for switch setting.
Determination of division work
The vacuum pump used must have a capacity of reaching at least
5 torr, more than 1 hour
Vacuum drying
Recharge correctly as calculated in this manual. and record the
amount of added refrigerant
Additional charge of refrigerant
Make sure there are no gaps left between the facing materials
used on the ceiling
Fit facing panels
Run each indoor unit in turn to make sure the pipe work
has been fitted correctly
Test run adjustment
Explain the use of the system as clearly as possible to your customer and
make sure all relevant documentation is in order
Transfer to customer with explanation
Preheat the crank case with the electrical heater for more than 6 hours.
Installation of Compressor module &
Heat exchanger module
Foundation work for Compressor Module
& Heat exchanger Module installation
Multiple core cable must not be used.
(suitable cable should be selected)
(Including Connecting communicate wiring to
between Cycle module and Condenser module)
CAUTION
• The above list indicates the order in which the individual work
operations are normally carried out but this order may be varied
where local conditions warrants such change.
• The thickness of the piping should comply with the relevant
local and national regulations for the designed pressure 3.8MPa.
• Since R410A is a mixed refrigerant, 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.)
!
Compressor Module Power Supply :
380-415 V 3N~ 50 Hz
CAUTION
• Ratio of the connectable Indoor Units to the Outdoor: Within
50 ~ 130%
• Ratio of running Indoor Units to the Outdoor: Within 10 ~ 100%
• A combination operation over 100% cause to reduce each
indoor unit capacity.
!
System(HP) 5
Model ARUN050LMC0
Refrigerant Precharged
Amount
kg 2
lbs 4.4
Number of maximum connectable indoor
units 10
Net weight kg 70
lbs 169
Dimensions (WxHxD) mm 580 ×700 ×500
inch 22.3 x 27.5 x 19.6
Piping
Connections
Liquid Pipes mm(inch) Ø 9.52(3/8) to IDU
Gas Pipes mm(inch) Ø 15.88(5/8) to IDU
Heat Exchanger Module Power Supply :
220-240 V~ 50 Hz
System(HP) 5
Model ARUN050GME0
Refrigerant Precharged
Amount
kg -
lbs -
Number of maximum connectable indoor
units -
Net weight kg 89
lbs 198
Dimensions (WxHxD) mm 1,562 ×460 ×688
inch 61.5 ×18.1 ×27
Piping
Connections
Liquid Pipes mm(inch) Ø 12.7(1/2) to Compressor Module
Gas Pipes mm(inch) Ø 19.05(3/4) to Compressor Module
CAUTION
• The wall thickness of the piping should comply with the relevant
local and national regulations for the designed pressure 3.8MPa
• Since R410A is a mixed refrigerant, 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 place the refrigerant container under the direct rays of
the sun to prevent it from exploding.
• For high-pressure refrigerant, any unapproved pipe must not be
used.
• Do not heat pipes more than necessary to prevent them from
softening.
• Be careful not to install wrongly to minimize economic loss
because it is expensive in comparison with R22.
!
ALTERNATIVE REFRIGERANT R410A
The refrigerant R410A has the property of higher operating pressure in
comparison with R22.
Therefore, all materials have the characteristics of higher resisting
pressure than R22 ones and this characteristic should be also
considered during the installation.
R410A is an azeotrope of R32 and R125 mixed at 50:50, so the ozone
depletion potential (ODP) of R410A is 0.
OUTSIDE UNIT INFORMATION
INSTALLATION PROCESS
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7
ENGLISH
WARNING
Fix the outside unit firmly with anchor bolt or it may fall and hurt
people. (refer to ‘Foundation for installation’)
!
INSTALLATION SPACE : HEAT
EXCHANGER MODULE
• The following values are the least space for installation. If any service
area is needed for service according to field circumstance, obtain
enough service space.
• The unit of values is mm.
Installation Space for Heat Exchanger Module
ab
cd
e
Service Space
(Front Side)
Front side
Top View Front View
[Unit: mm]
[Unit: mm]
600 or more
70 or more
H = 100 or more
Top View
Front View
10 or more
Air discharge
Air Suction Inspection hole
(600 x 600)
Control box
SELECT THE BEST LOCATION :
HEAT EXCHANGER MODULE
It must be installed indoors.
Ambient design temprature of compressor module and
Heat exchange module is 5~35°C (26°C WB)
The heat exchanger module has the same installation site
requirements as the compressor module, and few additional ones.
Install the air conditioner in the location that satisfies the following
conditions.
• The place shall easily bear a load exceeding four times the Heat
Exchanger Module weight.
• The place shall be able to inspect the Heat Exchanger Module as the
figure.
• The place where the Heat Exchanger Module shall be leveled.
• The place shall allow easy water drainage. (Suitable dimension “H” is
necessary to get a slope to drain as figure.)
• The place shall easily connect with the Compressor Module.
• The place where the Heat Exchanger Module is not affected by an
electrical noise.
• There should not be any heat source or steam near the unit.
INSTALLATION SPACE :
COMPRESSOR MODULE
• The following values are the least space for installation. If any service
area is needed for service according to field circumstance, obtain
enough service space.
• The unit of values is mm.
Installation Space for Compressor Module
SELECT THE BEST LOCATION :
COMPRESSOR MODULE
It must be installed indoors.
Ambient design temprature of compressor module and
Heat exchange module is 5~35°C (26°C WB)
Select space for installing compressor module, which will meet the
following conditions:
• No direct thermal radiation from other heat sources.
• Do not installation where sensitive place the noise
• No exposition to strong wind
• With strength which bears weight of unit
• Note that drain flows out of unit when heating
• With space for air passage and service work shown next
• Because of the possibility of fire, do not install unit to the space
where generation, inflow, stagnation, and leakage of combustible
gas is expected.
• Avoid unit installation in a place where acidic solution and spray
(sulfur) are often used.
• Do not use unit under any special environment where oil, steam and
sulfuric gas exist.
• It is recommended to fence round the compressor module in order
to prevent any person or animal from accessing the compressor
module.
Select installation location considering following conditions to avoid
bad condition when additionally performing defrost operation.
• Install the outside unit at a place well ventilated and having a lot of
sunshine in case of installing the product at a place with a high
humidity in winter (near beach, coast, lake, etc).
(Ex) Rooftop where sunshine always shines.
• Performance of heating will be reduced and preheat time of the
indoor unit may be lengthened in case of installing the outside unit in
winter at following location:
- Shade position with a narrow space
- Location with much moisture in neighboring floor.
- Location with much humidity around.
- Location where ventilation is good. It is recommended to install the
outside unit at a place with a lot of sunshine as possible as.
- Location where water gathers since the floor is not even.
WARNING
Fix the outside unit firmly with anchor bolt or it may fall and hurt
people. (refer to ‘Foundation for installation’)
!
Category Mark Description Installation Space [ mm ]
Compressor
Module
a Right 10 or more
b Left 10 or more
c Rear 10 or more
d Front 500 or more
e Top 200 or more
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8CARRYING METHOD
ENGLISH
CAUTION
Be very careful while carrying the product.
•
Do not have only one person carry product if it is more than 20 kg.
• PP bands are used to pack some products. Do not use them as
a mean for transportation because they are dangerous.
• Do not touch heat exchanger fins with your bare hands.
Otherwise you may get a cut in your hands.
• Tear plastic packaging bag and scrap it so that children cannot
play with it. Otherwise plastic packaging bag may suffocate
children to death.
• Place extra cloth or boards in the locations where the casing
comes in contact with the sling to prevent damage.
!
• Fix the unit tightly with bolts as shown below so that unit will not fall
down due to earthquake or gust.
• Use the H-beam support as a base support
• Noise and vibration may occur from the floor or wall since vibration is
transferred through the installation part depending on installation
status. Thus, use anti-vibration materials (cushion pad) fully (The base
pad shall be more than 200mm).
At least 200mm
Unit : mm
200
75
75
200
100
ⒶThe corner part must be fixed firmly. Otherwise, the support for the
installation may be bent.
ⒷGet and use M10 Anchor bolt.
ⒸPut Cushion Pad between the outside unit and ground support for
the vibration protection in wide area.
ⒹSpace for pipes and wiring (Pipes and wirings for bottom side)
ⒺH-beam support
ⒻConcrete support
WARNING
• Install where it can sufficiently support the weight of the
compressor module.
If the support strength is not enough, the compressor module
may drop and hurt people.
• Install where the compressor module may not fall in strong
wind or earthquake.
If there is a fault in the supporting conditions, the outside unit
may fall and hurt people.
• Please take extra cautions on the supporting strength of the
ground and the passages of the pipe and wiring, when making
the ground support.
!
Foundation for Installation
Front panel
a
cd
b
ARUN050LMC0
a 580
b 530
c 500
d 462
e25
[Unit : mm]
At least 100mm
At least 100mm
At least 100mm
For outdoor units
should not be
supported only
by the corner
supports.
Center of the Unit
At least 100mm
At least 100mm
At least 100mm
Center of the Unit
The location of the Anchor bolts
INSTALLATION : COMPRESSOR
MODULE
• You can install the compressor module directly on the floor or on a
structure. If you want to install on floor, you do not use ancor bolt.
• Install at places where it can endure the weight and vibration/noise
of the compressor module.
• The compressor module supports at the bottom shall have width of
at least 100mm under the Unit’s legs before being fixed.
• The compressor module supports should have minimum height of
200mm.
• Anchor bolts must be inserted at least 75mm.
CARRYING METHOD
• Please transport the product referring to the figure.
• Use only accessories and parts which are of the designated
specification when installing.
Compressor Module.
Heat Exchanger Module.
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9
ENGLISH
CAUTION
• In case of on the floor you should not have to fix the compressor
module with anchor bolts.
• In case of on the structure you can fix the Compressor module
securely use anchor bolts, nuts and washers to the structure.
The foundation must be larger than the image
• If noise / vibration occurs, install rubber pad under the product
• Be sure to remove the Pallet(Wood Support) of the bottom side
of the compressor module before welding.
Not removing Pallet(Wood Support) causes hazard of fire during
welding.
• When vibration is transmitted to the building, use a vibration
proof rubber (field supply).
Pallet(Wood Support)
- Remove before Installation
!
INSTALLATION : HEAT
EXCHANGER MODULE
- Install the unit above the ceiling correctly.
CASE 1
Position of suspension Bolt
- Apply a joint-canvas between the module and duct to absorb
unnecessary vibration.
CASE 2
- Install the module leaning to a drainage hole side as a figure for easy
water drainage.
Position of console Bolt
- A place where the module will be leveled and that can support the
weight of the unit.
- A place where the module can withstand its vibration.
- A place where service can be easily performed.
Dimension
Chassis
ABCDEFGH I J KL
B8 1680 1565 1160 330 460 580 700 1400 1635 390 445 15
(Unit:mm)
B8 Chassis
M10 Nut
M10 washer
X 4
X 4
M10 Nut
M10 washer
X 4
X 8
NOTE
!
• Throughly study the following installation locations:
1. In such places as restaurants and kitchens, considerable
amount of oil steam and flour adhere to the fan, the fin of
the heat exchanger, resulting in heat exchange reduction,
spraying, dispersing of water drops, etc.
In these cases, take the following actions:
• Make sure that the ventilation fan for smoke-collecting hood on a
cooking table has sufficient capacity so that it draws oily steam
which should not flow into the suction of the air conditioner.
• Make enough distance from a cooking room to install the air
conditioner in such a place where it may not suck in oil steam.
2. Avoid installing air conditioner in such circumstances where cutting
oil mist or iron powder is in suspension in factories, etc.
3. Avoid places where inflammable gas is generated, flows in, is stored
or vented.
4. Avoid places where sulfurous acid gas or corrosive gas is generated.
5. Avoid places near high frequency generators.
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10
ENGLISH
Insulation, others : Insulate the joint and tubes
completely.
Thermal insulation : All thermal insulation must comply with local
requirement.
Heat Exchanger Module
Method connect the refrigerant piping to the
Heat Exchanger Module.
1. Cut the liquid pipe and gas pipe.
2. Burrs removal
- Completely remove all burrs from the cut cross section of
pipe/tube.
- Put the end of the copper tube/pipe to downward direction as you
remove burrs in order to avoid to let burrs drop in the tubing.
3. Wrap the pipe with a wet cloth.
4. Braze the liquid pipe and gas pipe.
5. Remove the wet cloth.
Copper
tube 90°
Slanted Uneven Rough
Pipe
Reamer
Point down
Make sure that there is no clearance here.
Overlap with thermal
insulator for piping.
Thermal insulator for refrigerant pipe
(Local supply) Thermal insulator for
piping(Local supply)
Hose crip for thermal insulator(Local supply)
Union for liquid pipe
Refrigerant pipe and thermal
insulator(Local supply)
Union for gas pipe
Thermal insulator for refrigerant pipe
(Local supply)
Hose crip for thermal insulator
(Local supply)
CAUTION
• Tighten the nut and bolt to prevent unit falling
!
Heat Exchanger Module Installation
- Select and mark the position for fixing bolts.
- Drill the hole for set anchor on the face of ceiling.
- Insert the set anchor and washer onto the suspension bolts for
locking the suspension bolts on the ceiling.
- Mount the suspension bolts to the set anchor firmly.
- Secure the installation plates onto the suspension bolts (adjust level
roughly) using nuts, washers and spring washers.
Method when insatalling the ducting
- Ducting is to be field supplied
- For prevent water from flowing into the Heat exchanger module,
Make sure the ductiong has slopes down
- You Protect the ducting against reverse airflow from wind.
- If the suction ducting or discharge ducting is connected with the
inside air, it might be impossible to reach the desired room
temperature.
- Connect suction ducting and discharge ducting with the outside air.
1 Set anchor
Old building New building
2 Plate washer
3 Spring washer
4 Nut
5 Suspension
bolts



www.lgcomfortcooling.co.uk

11
ENGLISH
CAUTION
1. Install declination of the indoor unit is very important for the
drain of the duct type air conditioner.
2. Minimum thickness of the insulation for the connecting pipe
shall be 5mm.
Front of view
- The unit must be horizontal or declined to the drain hose
connected when finished installation.
Ceiling
1~3mm
Drainage hole
Drainage hole
Ceiling
!
Indoor Unit Drain Piping
- Drain piping must have down-slope (1/50 to 1/100): be sure not to
provide up-and-down slope to prevent reversal flow.
- During drain piping connection, be careful not to exert extra force on
the drain port on the Heat Exchanger Module.
- The outside diameter of the drain connection on the Heat Exchanger
Module is 32mm.
- Be sure to install heat insulation on the drain piping.
- Connect the main drain pipe to the exterior and leave it provisionally
until the test comes to an end.
- Feed water to the flexible drain hose and check the piping for
leakage.
- When the test is complete, connect the flexible drain hose to the
drain port on the Heat Exchanger Module.
Preparation of Piping
Main cause of gas leakage is defect in flaring work. Carry out correct
flaring work in the following procedure.
Cut the pipes and the cable
- Use the accessory piping kit or the pipes purchased locally.
- Measure the distance between the indoor and the outside unit.
- Cut the pipes a little longer than measured distance.
- Cut the cable 1.5m longer than the pipe length.
Burrs removal
- Completely remove all burrs from the cut cross section of pipe/tube.
- Put the end of the copper tube/pipe to downward direction as you
remove burrs in order to avoid to let burrs drop in the tubing.
Piping material: Polyvinyl chloride pipe inner diometes Ø 25mm and
pipe fittings
Heat insulation material: Polyethylene foam with thickness more
than 8 mm.
Maintenance
drain port
Upward
routing
not allowed
Pipe clamp
Heat Exchanger Module
CAUTION
The supplied flexible drain hose should not be strained. A strained
hose may cause leakage of water.
!
Copper
tube 90 Slanted Uneven Rough
Pipe
Reamer
Point down
Checking the Drainage
1. Remove the Air Filter.
2. Check the drainage.
- Spray one or two glasses of water upon the Condenser.
- Ensure that water flows drain hose of Heat Exchanger Module
without any leakage.
www.lgcomfortcooling.co.uk

12
ENGLISH
1 Always use the nitrogen.(not use oxygen, carbon dioxide, and
a Chevron gas): Please use the following nitrogen pressure
0.02MPa Oxygen – Promotes oxidative degradation of
refrigerant oil. Because it is flammable, it is strictly prohibited
to use Carbon dioxide – Degrade the drying characteristics of
gas Chevron Gas – Toxic gas occurs when exposed to direct
flame.
2 Always use a pressure reducing valve.
3 Please do not use commercially available antioxidant.
The residual material seems to be the oxide scale is
observed. In fact, due to the organic acids generated by
oxidation of the alcohol contained in the anti-oxidants, ants
nest corrosion occurs. (causes of organic acid
→ alcohol +
copper + water + temperature)
CAUTION
!
Regulator
Nitrogen gas
Pressure 0.02MPa less
Auxiliary valve
Taping
(Should not
contain air)
Welding Point
Note) should not block the outlet side.
When the internal pressure in pipe is abo
ve the atmospheric pressure, pinhole is o
ccurred and it is a leakage cause.
Oxide scale
Nitrogen
Liquid Pipe to
Heat Exchanger
Module
Gas Pipe to
Heat Exchanger
Module
Charging Port
Gas Pipe to
Indoor Unit
Liquid Pipe to
Indoor Unit
CAUTION
Please block the pipe knock outs of the front and side panels after
installing the pipes.
(Animals or foreign objects may be brought in to damage wires.)
!
WARNING
• Always careful not to leak the refrigerant during welding.
• The refrigerant generates poisonous gas harmful to human body
if combusted.
• Do not perform welding in a closed space.
• Be sure to close the cap of the service port to prevent gas
leakage after the work.
!
Drying Cleanliness Airtight
Should be no moisture
inside No dust inside. There is no refrigerant
leakage
Items
Moisture
Dust
Leakage
Cause
failure
- Significant hydrolysis
of refrigerant oil
- Degradation of
refrigerant oil
- Poor insula’tion of
the compressor
- Do not cold and
warm
- Clogging of EEV,
Capillary
- Degradation of
refrigerant oil
- Poor insulation of
the compressor
- Do not cold and
warm
- Clogging of EEV,
Capillary
- Gas shortages
- Degradation of
refrigerant oil
- Poor insulation of
the compressor
- Do not cold and
warm
Counter
measur
e
- No moisture in the
pipe
- Until the connection
is completed, the
plumbing pipe
entrance should be
strictly controlled.
- Stop plumbing at
rainy day.
- Pipe entrance should
be taken side or
bottom.
- When removal burr
after cutting pipe,
pipe entrance should
be taken down.
- Pipe entrance should
be fitted cap when
pass through the
walls.
- No dust in the pipe.
- Until the
connection is
completed, the
plumbing pipe
entrance should be
strictly controlled.
- Pipe entrance
should be taken
side or bottom.
- When removal burr
after cutting pipe,
pipe entrance
should be taken
down.
- Pipe entrance
should be fitted cap
when pass through
the walls.
- Airtightness test
should be.
- Brazing operations
to comply with
standards.
- Flare to comply
with standards.
- Flange connections
to comply with
standards.
Precautions on Pipe connection / Valve operation
Pipe connection is done by connecting from the end of the pipe to the
branching pipes, and the refrigerant pipe coming out of the outside unit
is divided at the end to connect to each indoor unit. Flare connection
for the indoor unit, and welding connection for the outdoor pipe and
the branching parts.
- Use hexagonal wrench to open/close the valve.
Nitrogen substitution method
Welding, as when heating without nitrogen substitution a large
amount of the oxide film is formed on the internal piping.
The oxide film is a caused by clogging EEV, Capillary, oil hole of
accumulator and suction hole of oil pump in compressor.
It prevents normal operation of the compressor.
In order to avoid this problem, Welding should be done after replacing
air by nitrogen gas.
When welding plumbing pipe, the work is required.
Refrigerant piping on three principles
REFRIGERANT PIPING INSTALLATION
Plumbing materials and storage methods
Pipe must be able to obtain the specified thickness and should be
used with low impurities.
Also when handling storage, pipe must be careful to prevent a
fracture, deformity and wound.
Should not be mixed with contaminations such as dust, moisture.
www.lgcomfortcooling.co.uk

13
ENGLISH
Top side pipe draw out
Rear side pipe draw out
Refrigerant Pipe
Regulator
Nitrogen
Taping Valve
Nitrogen
Nitrogen
Direction
Direction
Nitrogen
Direction
<Gas pipe>
<Liquid pipe>
Wet towel
CAUTION
• Do not give damage to the pipe/base during the Knock Out
work.
• Proceed to pipe work after removing burr after Knock Out work.
• Perform sleeve work to prevent damage to the wire when
connecting wires using knock Outs.
!
Remove leakage prevention cap
• Remove the leakage prevention cap attached to the Outside Unit
service valve before pipe work.
• Proceed the leakage prevention cap removal as follows:
- Verify whether the liquid/gas pipes are locked.
- Extract remaining refrigerant or air inside using the service port.
- Remove the leakage prevention cap
Liquid Pipe to
Heat Exchanger
Module
Gas Pipe to
Heat Exchanger
Module
Charging Port
Gas Pipe to
Indoor Unit
Liquid Pipe to
Indoor Unit
Method of drawing out pipes on the rear side
- Proceed with the pipe work as shown in the below figure for rear
side pie drawing out.
Pipe Drawing Out
Method of out pipes on the top side
Cover the uninstalled area with a cover
Close the cover with the screw.
Close the cover with the screw.
Preparation Work
- Use Knock Outs of Base Pan of the Outside Unit for Left/Right or
Bottom pipe drawing outs.
TO CONNECT THE REFRIGERANT
PIPING TO THE COMPRESSOR
MODULE
- Pipe connections can be done on the top side or on the rear side
according to installation enviroments.
- Be sure to let 0.2kgf/cm2Nitrogen flow in the pipe when welding.
- If Nitrogen was not flown during welding, many oxidized membranes
may form inside the pipe and disturb the normal operations of valves
and condensers.
www.lgcomfortcooling.co.uk

14
ENGLISH
Piping parts
Name
①Main pipe
②Branching pipe
③Indoor unit connecting pipe
Selection
of
pipe size
Outside unit
capacity[HP]
Liquid pipe
[mm(inch)]
Gas pipe
[mm(inch)]
5 Ø9.52(3/8) Ø15.88(5/8)
①Size of main pipe
②Pipe size of between branching sections
③Connecting pipe size of indoor unit
Indoor unit capacity
[kW(Btu/h)]
Liquid pipe
[mm(inch)]
Gas pipe
[mm(inch)]
≤5.6(19,100) Ø6.35(1/4) Ø12.7(1/2)
< 16.0(54,600) Ø9.52(3/8) Ø15.88(5/8)
Indoor unit capacity
[kW(Btu/h)]
Liquid pipe
[mm(inch)]
Gas pipe
[mm(inch)]
≤5.6(19,100) Ø6.35(1/4) Ø12.7(1/2)
< 16.0(54,600) Ø9.52(3/8) Ø15.88(5/8)
①Outside unit →1st branching section
②Branching section →Branching section
③Branching section →Indoor unit
Gas pipe
Main pipe
Liquid pipe Branching
pipe
Branching
pipe
Indoor unit
Compressor Unit Condenser Unit
Selection of Refrigerant Piping
Y branch method
ⓐ: Compressor Module
ⓑ: Heat Exchanger Module
ⓒ: 1st branch (Y branch)
ⓔ: Indoor Units
d
ℓ≤40 m
h ≤15m
H2 ≤30m
L2 ≤70 m
Indoor
Unit
A
B
CDE
e
e
a
c
eeee
b
e
H1 ≤10m
L1 ≤30 m
Combination of Y branch / header
ⓐ: Compressor Module
ⓑ: Heat Exchanger Module
ⓒ: 1st branch (Y branch)
ⓓ: Y branch
ⓔ: Indoor Units
ⓕ: Header
ⓖ: Sealed piping
ℓ ≤ 40 m
h15m
L2 ≤70 m
c
d
f
ee
e
ee
g
H2≤ 30m
Indoor
Unit
A
B
C
D
e
e
a
b
H1≤ 10m
L1 ≤30 m
Header method
ⓐ: Compressor Module
ⓑ: Heat Exchanger Module
ⓕ: Header
ⓖ: Sealed piping
f
f
ddd
d
dd
g
ℓ≤40 m
h ≤15m
H2 ≤30m
Indoor
Unit
A
B
e
e
a
b
H1 ≤10m
L1 ≤30 m
L2 ≤70 m
Refrigerant piping system
www.lgcomfortcooling.co.uk

15
ENGLISH
WARNING
• It is recommended that difference of piping length for pipes
connected to the Indoor Unit is minimized. Performance
difference between Indoor Units may occur.
• When the any one (or both ) of below conditions are satisfied,
the diameter of main pipe (A) must be increased according to
below table.
- The equivalent length between outside unit and the farthest
indoor unit is 90m or more (Liquid and Gas pipes are
increased)
!
Refrigerant pipe diameter from branch to branch (B,C)
Downward Indoor
Unit total capacity
[kW(Btu/h)]
Liquid pipe [mm(inch)] Gas pipe [mm(inch)]
≤5.6(19,100) Ø6.35(1/4) Ø12.7(1/2)
< 16.0(54,600) Ø9.52(3/8) Ø15.88(5/8)
Refrigerant pipe diameter from outside unit to first branch. (A)
Outside unit
total capacity(HP) Liquid pipe [mm(inch)] Gas pipe [mm(inch)]
5 Ø9.52(3/8) Ø15.88(5/8)
Limits of pipe length and difference in height
Indoor Unit Connection
Indoor Unit connecting pipe from branch (a,b,c,d,e,f)
Indoor Unit capacity
[kW(Btu/h)]
Liquid pipe
[mm(inch)] Gas pipe [mm(inch)]
≤5.6(19,100) Ø6.35(1/4) Ø12.7(1/2)
< 16.0(54,600) Ø9.52(3/8) Ø15.88(5/8)
CAUTION
• Bending radius should be
at least twice the diameter
of the pipe.
• Bend pipe after 500 mm or
more from branch(or
header).
Do not bend U type.
It may cause Performance
unsatisfactory or noise.
• If want U type, bending R
is more than 200 mm.
!
500mm or more 500mm or more
The amount of Refrigerant
The calculation of the additional charge should take into account the
length of pipe and CF(correction Factor) value of indoor unit.
Attach the additional refrigerant table of IDU.
CAUTION
Use only 4-series of indoor unit. Ex) ARNU***2
Do not connect Hydrokit.
!
WARNING
• Branch pipe can not be used after header.
• Pipe length after header branching
- It is recommended that difference in length of the pipes
connected to the indoor units (a~f) is minimized. Performance
difference between indoor units may occur.
- Indoor units should be installed at lower position than the
header.
!
Connection method Mark Y branch only
Combination of
Y branch /
header
Header only
Longest pipe length : Heat
Exchanger Module ↔
Compressor Module
L1 A ≤30 m A ≤30 m A ≤30 m
Longest pipe length :
Compressor Module ↔
Indoor Unit
L2 B+C+D+E+e
≤70 m
B+C+b ≤70 m
B+D+e ≤70 m B+f ≤70 m
Longest pipe equivalent
length* : Compressor
Module ↔Indoor Unit
L2* 90 m 90 m 90 m
Longest pipe length after
1st branch ℓ30 m 30 m 30 m
Total pipe length - A+B+C+D+E+e
≤140 m
A+B+C+D+a+b+
c+d+e ≤140 m
A+B+a+b+c+d+
e+f ≤140 m
Difference in height :
Compressor Module ↔
HEX Module
H1 10 m 10 m 10 m
Difference in height :
Compressor Module ↔
Indoor Unit
H2 30 m 30 m 30 m
Difference in height :
Indoor Unit ↔Indoor Unit h15 m 15 m 15 m
Max. difference in height Max. pipe length
NOTE
!
• * : Assume equivalent piping length of Y branch to be 0.5m, that
of header to be 1m, calculation purpose.
WARNING
• When the below condition is satisfied, the diameter of main pipe
(B : Compressor Module ↔1 st Branch) must be increased
according to below table.
- The equivalent length between Heat Exchanger Module and
the farthest indoor unit is 90m or more
(Liquid / Gas pipes are increased in accordance with below
tables)
!
Additional
charge (kg) = L1(m) : Total length of liquid pipe with
Ø12.7mm ×0.118 (kg/m)
Important
Check the Total length between
Heat Exchanger Module ~ Compressor
Module ~ Indoor Unit
+ L2(m) : Total length of liquid pipe with
Ø9.52mm ×0.061 (kg/m)
+ L3(m) : Total length of liquid pipe with
Ø6.35mm ×0.022 (kg/m)
+CF value of Heat Exchanger Module
(1 kg)
+CF value of Indoor unit *
NOTE
!
• * : For CF value (additional refrigerant) table of indoor units,
please refer to PDB of indoor unit.
www.lgcomfortcooling.co.uk

16
ENGLISH
WARNING
• Regulation for refrigerant leakage
: the amount of refrigerant leakage should satisfy the following
equation for human safety.
If the above equation can not be satisfied, then follow the
following steps.
• Selection of air conditioning system: select one of the next
- Installation of effective opening part
- Reconfirmation of Outdoor Unit capacity and piping length
- Reduction of the amount of refrigerant
- Installation of 2 or more security device (alarm for gas leakage)
• Change Indoor Unit type
:
installation position should be over 2m from the floor (Wall
mounted type →Cassette type)
• Adoption of ventilation system
: choose ordinary ventilation system or building ventilation
system
• Limitation in piping work
: Prepare for earthquake and thermal stress
Liquid pipe
Gas pipe
ⒶManifold Gauge
ⒷLow pressure side Handle
ⒸHigh pressure side Handle
!
WARNING
• Pipe to be vacuumed : gas pipe, liquid pipe
• If the refrigerant amount is not exact, it may not operate
properly.
• If additionally bottled refrigerant amount is over 10%, condenser
burst or insufficient indoor unit performance may be caused.
!
Volume of the room at which Indoor Unit of
the least capacity is installed
Total amount of refrigerant in the system
≤0.44 (kg / m3)
1st
1st
1st
Main pipe
Distribution
2nd
2nd 3rd
3nd
Main pipe
Distribution
Compressor
Module Heat Exchanger Module
Compressor
Module Heat Exchanger Module
1st 3rd
3rd main pipe distribution
2nd
Compressor
Module Heat Exchanger Module
Horizontal Distribution
- Ensure that the branch pipes are attached vertically.
Compressor
Module Heat Exchanger Module
Compressor
Module Heat Exchanger
Module
Compressor
Module Heat Exchanger Module
Header
Compressor
Module Heat Exchanger
Module
Vertical Distribution
The others
Distribution Method
Refrigerant charging
www.lgcomfortcooling.co.uk

17
ENGLISH
• When the number of indoor units to be connected to the branch
pipes is less than the number of branch pipes available for
connection then cap pipes should be fitted to the surplus branches.
• Fit branch pipe lie in a horizontal plane.
Pinched pipe
B
Horizontal plane
View from point B in the direction of the arrow
Header
Insulator
(included with kit)
Liquid and gas
pipe joints Insulator for
field piping
Tape
(field supply)
A
B
C
• There is no limitation on the joint mounting configuration.
• If the diameter of the refrigerant piping selected by the procedures
described is different from the size of the joint, the connecting
section should be cut with a pipe cutter.
• Branch pipe should be insulated with the insulator in each kit.
ⒶTo Outdoor Unit
ⒷTo Indoor Unit
• The indoor unit having larger
capacity must be installed closer
to Ⓐthan smaller one.
• If the diameter of the refrigerant
piping selected by the
procedures described is
different from the size of the
joint, the connecting section
should be cut with a pipe cutter.
ⓒPipe cutter
• When the number of pipes to be
connected is smaller than the
number of header branches,
install a cap to the unconnected
branches.
Y branch
A
B
Facing
upwards
Facing
downwards
Within ±3° Within ±3°
Viewed from point A
in direction of arrow
Horizontal
plane
Within +/- 10°
A
Ⓐ To Branch Piping or Indoor Unit
ⒷTo Outdoor Unit
• Ensure that the branch pipes are attached horizontally or vertically
(see the diagram below.)
Branch pipe Fitting
• Joints between branch and pipe should be sealed with the tape
included in each kit.
• Any cap pipe should be insulated using the insulator provided with
each kit and then taped as described above.
Insulator
Insulator of field pipe
Tape
Tape
Cap pipe
Insulator for cap pipe
Y branch pipe
Models Gas pipe
[Unit:mm]
Liquid pipe
[Unit:mm]
ARBLN
01621
I.D19.05
O.D15.88
I.D12.7
I.D15.88
I.D12.7
I.D15.88
I.D15.88
I.D12.7
292
281
74
70
a
a
I.D12.7
O.D9.52
I.D6.35
I.D9.52
I.D.9.52
I.D.6.35
I.D9.52
I.D.6.35
292
281
74
70
a
a
ARBLN
03321
I.D25.4
413
390
83
I.D15.88I.D19.05 I.D12.7
I.D12.7I.D19.05I.D15.88I.D19.05I.D22.2
I.D28.58 O.D25.4 I.D22.2
O.D19.05 O.D19.05
I.D22.2 I.D25.4
70 80 110
ab
c
c a b
I.D9.52
I.D12.7
53.6D.I25.9D.I
I.D9.52
I.D12.7
I.D6.35
I.D12.7
332
321
74
Models Gas pipe
[Unit:mm]
Liquid pipe
[Unit:mm]
4 branch
ARBL054
120 150
360
120
ID15.88
ID12.7
ID12.7
ID15.88
ID15.88
ID19.05
120
120 150
360
ID9.52 ID9.52
ID6.35
ID6.35
ID9.52
ID12.7
7 branch
ARBL057
540
120 150
120
ID15.88
ID12.7
ID15.88
ID12.7
ID15.88
ID19.05
540
120 150
120 ID6.35
ID9.52
ID9.52
ID12.7
[unit:mm]
• Header should be insulated with the insulator in each kit.
Insulate the header using
the insulation
material attached to the
branch pipe kit
as shown in the figure.
[unit:mm]
Header
www.lgcomfortcooling.co.uk

18
ENGLISH
Leak test
Leak test should be made by pressurizing nitrogen gas to 3.8
MPa(38.7kgf/cm2). If the pressure does not drop for 24 hours, the
system passes the test. If the pressure drops, check where the
nitrogen leaks. For the test method, refer to the following figure.
(Make a test with the service valves closed. Be also sure to pressurize
liquid pipe, gas pipe and high/low pressure common pipe)
The test result can be judged good if the pressure has not be reduced
after leaving for about one day after completion of nitrogen gas
pressurization.
Indoor unit
Nitrogen gas
cylinder
To Heat Exchanger Module To Indoor Unit
Liquide pipe
Gas pipe
Liquide pipe
Gas pipe
Liquid side
Gas side
Close Close
Close
Close
NOTE
!
If the ambient temperature differs between the time when pressure is
applied and when the pressure drop is checked, apply the following
correction factor
There is a pressure change of approximately 0.1 kg/cm2(0.01 MPa) for
each 1°C of temperature difference.
Correction= (Temp. at the time of pressurization – Temp. at the time
of check) X 0.1
For example: Temperature at the time of pressurization
(3.8 MPa) is 27 °C
24 hour later: 3.73 MPa, 20°C
In this case the pressure drop of 0.07 is because of
temperature drop And hence there is no leakage in pipe
occurred.
CAUTION
To prevent the nitrogen from entering the refrigeration system in
the liquid state, the top of the cylinder must be at higher position
than the bottom when you pressurize the system.
Usually the cylinder is used in a vertical standing position.
!
WARNING
Use a vacuum pump or Inert(nitrogen) gas when doing leakage test
or air purge. Do not compress air or Oxygen and do not use
Flammable gases. Otherwise, it may cause fire or explosion.
- There is the risk of death, injury, fire or explosion.
!
Vacuum
Vacuum drying should be made from the service port provided on the outside
unit’s service valve to the vacuum pump commonly used for liquid pipe, gas
pipe and high/low pressure common pipe. (Make Vacuum from liquid pipe, gas
pipe and high/low pressure common pipe with the service valve closed.)
* Never perform air purging using refrigerant.
• Vacuum drying: Use a vacuum pump that can evacuate to -100.7kPa
(5 Torr, -755mmHg).
- Evacuate the system from the liquid and gas pipes with a vacuum
pump for over 2 hrs and bring the system to -100.7kPa. After
maintaining system under that condition for over 1 hr, confirm the
vacuum gauge rises. The system may contain moisture or leak.
- Following should be executed if there is a possibility of moisture
remaining inside the pipe.
(Rainwater may enter the pipe during work in the rainy season or over
a long period of time)
After evacuating the system for 2 hrs, give pressure to the system to
0.05MPa(vacuum break) with nitrogen gas and then evacuate it again
with the vacuum pump for 1hr to -100.7kPa(vacuum drying). If the
system cannot be evacuated to -100.7kPa within 2 hrs, repeat the
steps of vacuum break and its drying. Finally, check if the vacuum
gauge does not rise or not, after maintaining the system in vacuum
for 1 hr.
Scale
Use a graviometer.
(One that can measure
down to 0.1kg). If you
are unable to prepare
such a high-precision
gravimeter you may use
a charge cylinder.
Vacuum
pump
Indoor unit
To Heat Exchanger Module To Indoor Unit
Liquide pipe
Gas pipe
Liquide pipe
Gas pipe
Liquid side
Gas side
Close Close
Close
Close
NOTE
!
Always add an appropriate amount of refrigerant. (For the refrigerant
additional charge)
Too much or too little refrigerant will cause trouble.
To use the Vacuum Mode
(If the Vacuum mode is set, all valves of Indoor units and Outside units will be
opened.)
WARNING
Use a vacuum pump or Inert(nitrogen) gas when doing leakage test
or air purge. Do not compress air or Oxygen and do not use
Flammable gases. Otherwise, it may cause fire or explosion.
- There is the risk of death, injury, fire or explosion.
!
WARNING
When installing and moving the air conditioner to another site,
recharge after perfect evacuation.
- If a different refrigerant or air is mixed with the original
refrigerant, the refrigerant cycle may malfunction and the unit
may be damaged.
!
Leak Test and Vacuum drying
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19
ENGLISH
This function is used for creating vacuum in the system after
compressor replacement, ODU parts replacement or IDU
addition/replacement.
Vacuum mode setting method
Vacuum mode off method
CAUTION
ODU operation stops during vacuum mode. Compressor can't
operate.
Master unit PCB DIP switch on : No.5
Select the mode using ‘▶’, ‘◀’ Button :
“SVC” Push the ‘●’ button
Select the Function using ‘▶’, ‘◀’ Button :
“Se3” Push the ‘●’ button
Start the vacuum mode : “VACC”
ODU V/V open
ODU EEV open
IDU EEV open
Dip switch off and push the reset button on Master unit PCB
!
DIP SWITCH
7-Segment
SW01C ( : confirm)
SW02C ( : backward)
SW04C ( X : cancel)
SW01D (reset)
SW03C ( : forward)
Be sure to give insulation work to refrigerant piping by covering liquid
pipe and gas pipe separately with enough thickness heat-resistant
polyethylene, so that no gap is observed in the joint between indoor
unit and insulating material, and insulating materials themselves. When
insulation work is insufficient, there is a possibility of condensation
drip, etc. Pay special attention to insulation work to ceiling plenum.
ⒶHeat insulation material
ⒷPipe
ⒸOuter covering(Wind the connection part and cutting part of heat
insulation material with a finishing tape.)
Heat insulation
material
Adhesive + Heat - resistant
polyethylene foam + Adhesive tape
Outer
covering
Indoor Vinyl tape
Floor
exposed
Water-proof hemp cloth +
Bronze asphalt
Outdoor
Water-proof hemp cloth +
Zinc plate + Oily paint
NOTE
!
When using polyethylene cover as covering material, asphalt
roofing shall not be required.
Bad example
• Do not insulate gas or low pressure pipe and liquid or
highpressure pipe together.
• Be sure to fully insulate connecting portion.
Ⓐ These parts are not insulated.
ⒶLiquid pipe
ⒷGas pipe
ⓒPower lines
ⓓ Finishing tape
ⓔ Insulating material
ⓕ Communication lines
A
C
D
E
B
F
A
Good example
ⒶLiquid pipe
ⒷGas pipe
ⓒPower lines
ⓓ Insulating material
ⓔ Communication lines
Communication lines
Separation
Power lines
E
D
D
BA
C
Thermal insulation of refrigerant pipingVacuum Mode
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20
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AB
EB
I
AB
D
C
1m1m
D
F
G
B
G
D
B
H
IJ
A
ⒶSleeve
ⒷHeat insulating material
ⒸLagging
ⒹCaulking material
ⒺBand
ⒻWaterproofing layer
ⒼSleeve with edge
ⒽLagging material
ⒾMortar or other incombustible caulking
ⒿIncombustible heat insulation material
When filling a gap with mortar, cover the penetration part with steel plate so
that the insulation material will not be caved in. For this part, use
incombustible materials for both insulation and covering. (Vinyl covering
should not be used.)
Inner wall (concealed) Outer wall Outer wall (exposed)
Floor (fireproofing) Penetrating portion on fire
limit and boundary wall
Roof pipe shaft
- Install the Outside Unit communication cable away from the power
source wiring so that it is not affected by electric noise from the power
source. (Do not run it through the same conduit.)
- Be sure to provide designated grounding work to Outside Unit.
- Give some allowance to wiring for electrical part box of Indoor and
Outside Units, because the box is sometimes removed at the time of
service work.
- Communication between the compressor module and the condenser
module must be connected at a fixed site on the terminal block.
- Never connect the main power source to terminal block of
communication cable. If connected, electrical parts will be burnt out.
- Use 2-core shield cable for communication cable.( mark in the
figure below) If communication cable of different systems are wired
with the same multiplecore cable, the resultant poor transmitting and
receiving will cause erroneous operations. ( mark in the figure
below)
- Only the communication cable specified should be connected to the
terminal block for
Outside Unit communication.
CAUTION
Be sure to correct the outside unit to earth. Do not connect ground
wire to any gas pipe, liquid pipe, lightening rod or telephone earth
line. If earth is incomplete, it may cause an electric shock.
!
WARNING
Be sure to have authorized electrical engineers do the electric
work using special circuits in accordance with regulations and this
installation manual.
If power supply circuit has a lack of capacity or electric work
deficiency, it may cause an electric shock or fire.
!
2-Core Shield Cable
Multi-Core Cable
Remote
control Remote control
Remote
control Remote control
Indoor
Unit Indoor Unit
Indoor
Unit Indoor Unit
Compressor Module Heat Exchanger
Module
Compressor Module Heat Exchanger
Module
Remote
control Remote control
Indoor
Unit Indoor Unit
Remote
control Remote control
Indoor
Unit Indoor Unit
Compressor Module Heat Exchanger
Module
Compressor Module Heat Exchanger
Module
Precautions when laying power wiring
Use round pressure terminals for connections to the power terminal
block.
Round pressure terminal Power cable
- For wiring, use the designated power cable and connect firmly, then
secure to prevent outside pressure being exerted on the terminal
block.
- Use an appropriate screwdriver for tightening the terinal screws. A
screwdriver with a small head will strip the head and make proper
tighterning impossible.
- Over-tightening the terminal screws may break them.
CAUTION
• Use the 2-core shield cables for communication cables. Never use
them together with power cables.
• The conductive shielding layer of cable should be grounded to the
metal part of both units.
• Never use multi-core cable
• As this unit is equipped with an inverter, to install a phase leading
capacitor not only will deteriorate power factor improvement effect,
but also may cause capacitor abnormal heating. Therefore, never
install a phase leading capacitor.
• Make sure that the power unbalance ratio is not greater than 2%.
If it is greater the units lifespan will be reduced.
!
When none are available, follow the instructions below.
- Do not connect wiring of different thicknesses to the power terminal
block. (Slack in the power wiring may cause abnormal heat.)
- When connecting cable which is the same thickness, do as shown in
the figure below.
ELECTRICAL WIRING
Caution
- Follow ordinance of your governmental organization for technical
standard related to electrical equipment, wiring regulations and
guidance of each electric power company.
Penetrations
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