LG Multi V PRHR042A User manual

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.
For Heat Pump / Heat Recovery system
Original instruction
MFL68980308
Rev.03_051320
www.lghvac.com
www.lg.com
Copyright © 2016 - 2020 LG Electronics Inc. All Rights Reserved.
ENGLISH
FRANÇAIS
ESPAÑOL

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. Installation of all field wiring and
components MUST conform with local building codes or, in the
absence of local codes, with the National Electrical Code 70 and the
National Building Construction and Safety Code or Canadian
Electrical code and National Building Code of Canada.
• 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 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 outdoor 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.
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 outdoor
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.
!
!
!
• 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 :

3
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 outdoor
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 (44 lbs).
- 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 outdoor unit, suspending it at the specified
positions on the unit base. Also support the outdoor 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.
• 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.
!
ENGLISH

4
ENGLISH
52 Low Ambient Kit (Fn 9)
52 High Efficiency Mode (Cooling Operation) (Fn 10)
52 Auto Dust Removal Mode (Fn 11)
53 Compressor Max. Frequency Limit (Fn 12)
53 ODU Fan Max. RPM Limit (Fn 13)
53 SLC (Smart Load Control) (Fn 14)
53 Humidity Reference Control (Fn 16)
54 Central Control Connection at Indoor Unit side (Fn 19)
54 Compressor Input Current Limit Mode (Fn 20)
54 Overall Defrost Operating in Low temperature (Heating) (Fn 22)
54 Base pan Heater operation (Fn 23)
55 Comfort Cooling operation (Id 10)
56 Self-Diagnosis Function
58 CAUTION FOR REFRIGERANT LEAK
58 Introduction
58 Checking procedure of limiting concentration
59 INSTALLATION GUIDE AT THE SEASIDE
60 Model Designation
2 TIPS FOR SAVING ENERGY
2 IMPORTANT SAFETY INSTRUCTIONS
5 INSTALLATION PROCESS
5 OUTDOOR UNITS INFORMATION
5 ALTERNATIVE REFRIGERANT R410A
5 SELECT THE BEST LOCATION
7 INSTALLATION SPACE
7 Individual Installation
7 LIFTING METHOD
8 INSTALLATION
8 The location of the Anchor bolts
8 Foundation for Installation
8 Preparation of Piping
10 Plumbing materials and storage methods
11 REFRIGERANT PIPING INSTALLATION
11 Precautions on Pipe connection / Valve operation
11 Connection of Outdoor units
12 Installation procedure for HR unit
12 Installation of Outdoor Unit, HR Unit, Indoor Unit Refrigerant Pipe
12 Type of HR Unit
13 Installation of Zoning Control
14 Caution
14 Precautions on Pipe connection / Valve operation
15 Connection of Outdoor units
15 Caution
16 PIPE CONNECTIONS BETWEEN INDOOR
AND OUTDOOR UNIT
16 Preparation Work
17 Pipe Drawing Out during Single / Series connection
17 Refrigerant piping system
19 Preparation Work
20 Pipe Drawing Out during Single / Series connection
20 Refrigerant piping system
21 Series Outdoor Units (2 Units ~ 3 Units)
21 Pipe Connection Method between outdoor unit/indoor unit
25 Refrigerant charging
25 Branch pipe Fitting
29 Distribution Method
29 Vacuum Mode
30 Leak Test and Vacuum drying
31 Thermal insulation of refrigerant piping
32 ELECTRICAL WIRING
32 Caution
33 Control box and connecting position of wiring
33 Communication and Power Cables
34 Wiring of main power supply and equipment capacity
34 Field Wiring
38 Checking the setting of outdoor units
40 Switch for setup of HR Unit
44 Automatic Addressing
45 The Procedure of Automatic Addressing
46 Flow chart of auto pipe detection Process
47 Flow chart of manual addressing for pipe detection
47 Example of manual valve addressing (Non-Zoning setting)
48 Example of manual valve addressing (Zoning setting)
48 Method of checking the pipe detection result at HR unit
48 Identification of Manual Valve ID (Address)
48 Method of checking the pipe detection result at outdoor unit
48 Setting method of Master indoor unit in zoning
49 Group Number setting
50 Cool & Heat selector (Fn 1)
50 High Static Pressure Compensation mode (Fn 2)
50 Night Low Noise Function (Fn 3)
51 Overall HEX defrost mode (Fn 4)
51 Setting the ODU address (Fn 5)
51 Snow removal & rapid defrost (Fn 6)
52 Target pressure adjusting (Fn 8)
TABLE OF CONTENTS

CAUTION
!
• The wall thickness of the piping should comply with the relevant
local and national regulations for the designed pressure 3.8 MPa
[551.1 psi]
• 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.
5
ENGLISH
SELECT THE BEST LOCATION
Select space for installing outdoor unit, which will meet the following
conditions:
• No direct thermal radiation from other heat sources
• No possibility of annoying neighbors due to noise of unit
• No exposition to strong wind
• With strength which bears weight of unit
• Note that drain flows out of unit when heating
• Because of the possibility of fire, do not install unit to the space
where generation, inflow, stagnation, and leakage of combustible gas
is expected.
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 also be
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.
CAUTION
!
Notes : * We can guarantee the operation only within 130 %
combination.
Combination Ratio(50~130 %)
Outdoor Number Connection Capacity
Single outdoor units
130 %Double outdoor units
Triple outdoor units
OUTDOOR UNITS INFORMATION
The foundation must be level even
Outdoor unit foundation work
Avoid short circuits and ensure
sufficient space is allowed for service
Installation of outdoor unit
Refer to automatic addressing flowchart
Automatic addressing of indoor unit
In the final check for 24 hours at 3.8 MPa (38.7 kgf/cm
2
)[551.1 psi]
there must be no drop in pressure.
Airtight test
Multiple core cable must not be used.
(suitable cable should be selected)
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 PROCESS
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 3.8 MPa
(551.1 psi).
• 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.)

6
ENGLISH
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.
2 Series
• 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 outdoor unit in order to
prevent any person or animal from accessing the outdoor unit.
• If installation site is area of heavy snowfall, then the following
directions should be observed.
- Make the foundation as high as possible.
- Fit a snow protection hood.
• Select installation location considering following conditions to avoid
bad condition when additionally performing defrost operation.
- Install the outdoor 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 there is always sunshine.)
3 Series
■ Unit: mm(inch)
No. Part Name
Description
PRHR042A
PRHR032A
PRHR083A
PRHR063A
PRHR043A
PRHR033A
PRHR022A
PRHR023A
1Low pressure Gas
pipe connection port
Ø 28.58 (1-1/8)
Brazing connection
Ø 22.2 (7/8) Brazing
connection
2High pressure Gas
pipe connection port
Ø 22.2 (7/8) Brazing
connection
Ø 19.05 (3/4) Brazing
connection
3Liquid pipe
connection port
Ø 15.88 (5/8) Brazing
connection
(PRHR042A)
Ø 9.52 (3/8) Brazing
connection
Ø 12.7 (1/2) Brazing
connection
(PRHR032A)
4Indoor unit Gas pipe
connection port
Ø 15.88 (5/8) Brazing
connection
Ø 15.88 (5/8) Brazing
connection
5Indoor unit Liquid
pipe connection port
Ø 9.52 (3/8) Brazing
connection
Ø 9.52 (3/8) Brazing
connection
6 Control box - -
7 Hanger metal M10 or M8 M10 or M8
NOTE
!
• Be sure to install the inspection door at the control box side.
• If reducers are used, servicing space must be increased equal to
reducer's dimension.
For Heat Recovery Installation
54
6
419 (16-1/2)
61
(2-13/32)
137
(5-13/32)
124 (4-7/8)
128 (5-1/32)
30
(1-3/16)
60
(2-3/8)
More than
300 (11-13/16)
(Servicing space)
More than
450 (17-23/32)
(Servicing space)
More than 100 (3-15/16)
More than 100 (3-15/16)
(Servicing space)
(Servicing space)
More than 100 (3-15/16)
(Servicing space)
More than 100 (3-15/16)
More than 100 (3-15/16)
(Servicing space)
(Servicing space)
More than
300 (11-13/16)
More than
300 (11-13/16)
(Servicing space) (Servicing space)
More than 100 (3-15/16)
(Servicing space)
453 (17-27/32)
174
(6-27/32)
174
(6-27/32)
182
(7-5/32)
218 (8-19/32)
Inspection door
(servicing space)
481 (18-15/16)
1
2
3
7
450 (17-23/32)
450 (17-23/32)
345 (13-19/32)
345 (13-19/32)
345 (13-19/32)
300(11-13/16)
300(11-13/16) more
300(11-13/16)
254(10) more
(Servicing space) (Servicing space)
(Servicing space) (Servicing space)
500(19-11/16)
7
311(12-1/4)
6(1/4) more (Serviceing space)
6(1/4) more (Serviceing space)
126(4-31/32)
147(5-23/32)
6
54
19(3/4) 55(2-5/32)
389(15-5/16)
92
(3-5/8)
176(6-15/16)
Inspection door
(servicing space)
500(19-11/16)
254(10)
1
2
3
150(5-29/32) 486(19-1/8) 150(5-29/32)
165(6-1/2)
218(8-19/32)
300(11-13/16) more
300(11-13/16) more
300(11-13/16)
254(10) more
(Servicing space) (Servicing space)
(Servicing space) (Servicing space)
7
311(12-1/4)
809(31-27/32)
793(31-7/32)
160
(6-5/16) 160
(6-5/16)
218(8-19/32)
165
(6-1/2)
1
2
3
19(3/4)
55(2-5/32)
389(15-5/16)
92(3-5/8) 176(6-15/16)
147(5-23/32)
126(4-31/32) 5
4
6
254(10)
Inspection door
(servicing space)
800(31-1/2)
6(1/4) more (Serviceing space)
6(1/4) more (Serviceing space)

Limitati
ons on
the
height
of the
wall
(Refer
to 4
side
walls)
h2
h1
1 500 (59)
Inlet
side
A
B
50500
(19-11/16’’)(19-11/16’’)
500
(19-11/16’’)
Front
side
500
(19-11/16’’)
240
(9-1/2’’)
or more
50 (2) or more
45° or
more
• The height of the wall on the front side must
be 1 500 mm (59 inch) or less.
• The height of the wall on the inlet side must
be 500 mm (19-11/16’’) or less.
• There is no limit to the wall on Inlet side.
• If the height of the walls on the front and Inlet
side are higher than the limit, there must be
additional space on the front and the side.
- Additional Space on the front side by 1/2 of
h1
- Additional Space on the inlet side by 1/2 of
h2
- h1 = A(Actual height) - 1 500 (59 inch)
- h2 = B(Actual height) - 500 (19-11/16’’)
7
ENGLISH
During the installation of the unit, consider service, inlet, and outlet
acquire the minimum space as shown in the figures below.
Seasonal wind and cautions in winter
• Sufficient measures are required in a snow areas or severe cold
areas in winter so that product can be operated well.
• Get ready for seasonal wind or snow in winter even in other areas.
• Install a suction and discharge duct not to let in snow or rain.
• Install the outdoor unit in such a way that it should not come in
contact with snow directly.
If snow piles up and freezes on the air suction hole, the system may
malfunction. If it is installed at snowy area, attach the hood to the
system.
• Install the outdoor unit at the higher installation console by 50 cm
(19.7 inch) than the average snowfall (annual average snowfall) if it is
installed at the area with much snowfall.
• Where snow accumulated on the upper part of the Outdoor Unit by
more than 10 cm (3.9 inch), always remove snow for operation.
- The height of H frame must be more than 2 times the snowfall
and its width shall not exceed the width of the product. (If width
of the frame is wider than that of the product, snow may
accumulate)
- Don't install the suction hole and discharge hole of the Outdoor
Unit facing the seasonal wind.
• When carrying the suspended, unit pass the ropes under the unit and
use the two suspension points each at the front and rear.
• Always lift the unit with ropes attached at four points so that impact
is not applied to the unit.
• Attach the ropes to the unit at an angle of 40° or less.
Locking points for
transportation ropes
Forklift Carrying Guide
Forklift Carrying Hole
LIFTING METHOD
Individual Installation
INSTALLATION SPACE
Category Installation Space
Case 1
(10 mm(13/32 inch) ≤ Side
Space ≤ 49 mm(13/14 inch))
Case 2
(Side Space
≥ 49 mm(13/14 inch))
4 sides
are
walls
A≥ 10 (13/32)
B≥ 300 (11-13/16)
C≥ 10 (13/32)
D≥ 500 (19-11/16)
A≥ 50 (1-31/32)
B≥ 100 (3-15/16)
C≥ 50 (1-31/32)
D≥ 500(19-11/16)
A≥ 10 (13/32)
B≥ 300 (11-13/16)
C≥ 10 (13/32)
D≥ 500 (19-11/16)
E≥ 20 (25/32)
A≥ 50 (1-31/32)
B≥ 100 (3-15/16)
C≥ 50 (1-31/32)
D≥ 500 (19-11/16)
E≥ 100 (3-15/16)
A≥ 10 (13/32)
B≥ 500 (19-11/16)
C≥ 10 (13/32)
D≥ 500 (19-11/16)
E≥ 20 (25/32)
F≥ 900 (35-7/16)
A≥ 50 (1-31/32)
B≥ 100 (3-15/16)
C≥ 50 (1-31/32)
D≥ 500 (19-11/16)
E≥ 100 (3-15/16)
F≥ 500 (19-11/16)
A≥ 10 (13/32)
B≥ 300 (11-13/16)
C≥ 10 (13/32)
D≥ 300 (11-13/16)
E≥ 20 (25/32)
F≥ 500 (19-11/16)
A≥ 50 (1-31/32)
B≥ 100 (3-15/16)
C≥ 50 (1-31/32)
D≥ 100 (3-15/16)
E≥ 100 (3-15/16)
F≥ 500 (19-11/16)
Rear
to
Rear
A≥ 10 (13/32)
B≥ 500 (19-11/16)
C≥ 10 (13/32)
D≥ 500 (19-11/16)
F≥ 900 (35-7/16)
A≥ 50 (1-31/32)
B≥ 500 (19-11/16)
C≥ 50 (1-31/32)
D≥ 500 (19-11/16)
F≥ 600 (23-5/8)
A≥ 10 (13/32)
B≥ 500 (19-11/16)
C≥ 10 (13/32)
D≥ 500 (19-11/16)
E≥ 20 (25/32)
F≥ 1 200 (47-1/4)
A≥ 50 (1-31/32)
B≥ 500 (19-11/16)
C≥ 50 (1-31/32)
D≥ 500 (19-11/16)
E≥ 100 (3-15/16)
F≥ 900 (35-7/16)
A≥ 10 (13/32)
B≥ 500 (19-11/16)
C≥ 10 (13/32)
D≥ 500 (19-11/16)
E≥ 20 (25/32)
F≥ 1 800 (70-7/8)
A≥ 50 (1-31/32)
B≥ 500 (19-11/16)
C≥ 50 (1-31/32)
D≥ 500 (19-11/16)
E≥ 100 (3-15/16)
F≥ 1 200 (47-1/4)
Only 2
sides
are
walls
A≥ 10 (13/32)
B≥ 300 (11-13/16)
A≥ 10 (13/32)
B≥ 300 (11-13/16)
E≥ 20 (25/32)
ac
b
d
500
(19-11/16’’)
aeec
b
d
500
(19-11/16’’)
aec
b
f
d
500
(19-11/16’’)
aec
b
f
d
500
(19-11/16’’)
ac
b
f
d
500
(19-11/16’’)
aec
b
f
d
500
(19-11/16’’)
aeec
b
f
d
500
(19-11/16’’)
a
b
500
(19-11/16’’)
aee
b
500
(19-11/16’’)
Front
Front
Front Front
Front Front
Front
Front
Front
Front Front
Front Front
Front Front Front
Front
Front
Front
Front Front
No limit for the
height of wall
No limit for the height of wall
Front
CAUTION
!
Be very careful while carrying the product.
• Do not have only one person carry product if it is more than
20 kg (44 lbs).
• 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.
• When carrying in Outdoor Unit, be sure to support it at four
points. Carrying in and lifting with 3-point
support may make Outdoor Unit unstable, resulting in a fall.
• Use 2 belts of at least 8 m (26.2 ft) long.
• Place extra cloth or boards in the locations where the casing
comes in contact with the sling to prevent damage.
•
Hoist the unit making sure it is being lifted at its center of gravity.

8
ENGLISH
• Install at places where it can endure the weight and vibration/noise
of the outdoor unit.
• The outdoor unit support blocks at the bottom shall have width of at
least 100 mm (3-15/16 inch) under the Unit’s legs before being fixed.
• The outdoor unit support blocks should have minimum height of 200
mm (7-7/8 inch).
• Anchor bolts must be inserted at least 75 mm (2-15/16 inch).
At least 100 mm
(3-15/16 inch)
At least 100 mm
(3-15/16 inch)
At least 100 mm
(3-15/16 inch)
At least 100 mm
(3-15/16 inch)
At least 100 mm
(3-15/16 inch)
At least 100 mm
(3-15/16 inch)
Outdoor units
should not be
supported only by
the corner supports.
Center of the Unit
Center of the Unit
Chassis A [mm (inch)] B [mm (inch)]
UXA 930 (36-5/8) 748 (29-9/20)
UXB 1 240 (47-1/4) 1 040 (40-15/16)
• 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 200 mm (7-7/8 inch)).
At least
200(7-7/8)
760 (29-29/32)
731 (28-25/32)
65 (2-9/16)
65
(2-9/16)
Unit : mm (inch)
At least
65 (2-9/16)
At least 65 (2-9/16)
Unit : mm (inch)
200(7-7/8)
75(2-15/16)
75(2-15/16)
200(7-7/8)
100(3-15/16)
Ⓐ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 outdoor 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
outdoor unit.
If the support strength is not enough, the outdoor unit may drop
and hurt people.
• Install where the outdoor unit may not fall in strong wind or
earthquake.
If there is a fault in the supporting conditions, the outdoor unit
may fall and hurt people.
• Please take extra cautions on the supporting strength of the
ground, water outlet treatment(treatment of the water flowing
out of the outdoor unit in operation), and the passages of the
pipe and wiring, when making the ground support.
• Do not use tube or pipe for water outlet in the Base panel. Use
drainage instead for water outlet. The tube or pipe may freeze
and the water may not be drained.
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 outdoor unit.
- Cut the pipes a little longer than measured distance.
- Cut the cable 1.5 m (4.92 ft) longer than the pipe length.
Preparation of Piping
Pipe
Reamer
Point down
Copper
tube 90° Slanted Uneven Rough
Foundation for Installation
The location of the Anchor bolts
INSTALLATION
CAUTION
!
• Be sure to remove the Pallet(Wood Support) of the bottom side
of the outdoor unit Base panel before fixing the bolt. It may
cause the unstable state of the outdoor settlement, and may
cause freezing of the heat exchanger resulting in abnormal
operations.
• Be sure to remove the Pallet(Wood Support) of the bottom side
of the outdoor unit before welding. Not removing Pallet(Wood
Support) causes hazard of fire during welding.
Pallet(Wood Support)
- Remove before Installation

9
ENGLISH
Flaring work
- Carry out flaring work using flaring tool as shown below.
Firmly hold copper tube in a bar(or die) as indicated dimension in the
table above.
Check
- Compare the flared work with figure below.
- If flare is noted to be defective, cut off the flared section and do
flaring work again.
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.
Bar
Copper pipe
"A"
<Wing nut type> <Clutch type>
Inclined
Inside is shining without scratches.
Smooth all round
Even length
all round
Surface
damaged Cracked Uneven thickness
= Improper flaring =
Flare shape and flare nut tightening torque
Opening shutoff valve
Precautions when connecting pipes
- See the following table for flare part machining dimensions.
- When connecting the flare nuts, apply refrigerant oil to the inside and
outside of the flares and turn them three or four times at first. (Use
ester oil or ether oil.)
-
See the following table for tightening torque.(Applying too much torque may
cause the flares to crack.)
- After all the piping has been connected, use nitrogen to perform a
gas leak check.
1Remove the cap and turn the valve counter clockwise with the
hexagon wrench.
2Turn it until the shaft stops.
Do not apply excessive force to the shutoff valve. Doing so may
break the valve body, as the valve is not a backseat type. Always
use the special tool.
3Make sure to tighten the cap securely.
Pipe size
[mm (inch)]
Tightening Torque
N.m (lbs.ft) A [mm (inch)] Flare shape
Ø 9.52 (3/8) 38±4 (28±3.0) 12.8 (0.5)~13.2 (0.52)
90°±2
45°
±2
A
R=0.4~0.8
Ø 12.7 (1/2) 55±6 (41±4.4) 16.2 (0.64)~16.6 (0.65)
Ø 15.88 (5/8) 75±7 (55±5.2) 19.3 (0.76)~19.7(0.78)
Insulation of shutoff valve
1Use the heat insulation material for the refrigerant piping which has
an excellent heat-resistance (over 120 °C [248 °F]).
2Precautions in high humidity circumstance:
This air conditioner has been tested according to the "ISO
Conditions with Mist" and confirmed that there is not any default.
However, if it is operated for a long time in high humid atmosphere
(dew point temperature: More than 23 °C [73.4 °F]), water drops
are liable to fall. In this case, add heat insulation material according
to the following procedure:
- Heat insulation material to be prepared:
EPDM (Ethylene Propylene Diene Methylene)-over 120 °C
[248 °F] the heat-resistance temperature.
- Add the insulation over 10 mm [0.39 inch] thickness at high
humidity environment.
Indoor unit
Thermal insulator
(accessory)
Fastening band
(accessory)
Refrigerant piping
Closing shutoff valve
1Remove the cap and turn the valve clockwise with the hexagon
wrench.
2Securely tighten the valve until the shaft contacts the main body seal.
3Make sure to tighten the cap securely.
* For the tightening torque, refer to the table on the below.
Tightening torque
Shut
off
valve
size
(mm
(inch))
Tightening torque N.m (lbs.ft) (Turn clockwise to close)
Shaft
(valve body)
Cap
(Valve lid) Service port
Flare nut
Gas line
piping
attached
to unit
Closed Opened Hexagonal
wrench
Ø 6.35
(1/4) 6.0±0.6
(4.4±0.4)
5.0±0.0
(3.7±0.4)
4 mm
(0.16 inch)
17.6±2.0
(13.0±1.5)
12.7±2
(9.4±1.5)
16±2
(12±1.5)
-
Ø 9.52
(3/8) 38±4 (28±3.0)
Ø 12.7
(1/2) 10.0±1.0 (7.4±0.7) 20.0±2.0 (14.8±1.5) 55±6 (41±4.4)
Ø 15.88
(5/8)
12.0±1.2
(8.9±0.9) 5 mm
(0.24 inch)
25.0±2.5
(18.4±1.8)
75±7
(55±5.1)
Ø 19.05
(3/4)
14.0±1.4
(10.3±1.0) 110±10 (81.1±7.4)
Ø 22.2
(7/8) 30.0±3.0
(22.1±2.2) 8 mm (0.31 inch) -
Ø 25.4
(1)
25±3
(18.5±2.2)
CAUTION
!
• Always use a charge hose for service port connection.
•
After tightening the cap, check that no refrigerant leaks are present .
• When loosening a flare nut, always use two wrenches in
combination, When connecting the piping,
always use a spanner and torque wrench
in combination to tighten the flare nut.
• When connecting a flare nut, coat the
flare(inner and outer faces) with oil for
R410A(PVE) and hand tighten the nut
3 to 4 turns as the initial tightening.
Union
Pipe diameter
Inch (mm)
A inch (mm)
Wing nut type Clutch type
Ø 1/4 (Ø 6.35) 0.04~0.05(1.1~1.3)
0~0.02
(0~0.5)
Ø 3/8 (Ø 9.52) 0.06~0.07(1.5~1.7)
Ø 1/2 (Ø 12.7) 0.06~0.07(1.6~1.8)
Ø 5/8 (Ø 15.88) 0.06~0.07(1.6~1.8)
Ø 3/4 (Ø 19.05) 0.07~0.08(1.9~2.1)

10
ENGLISH
Refrigerant piping on three principles
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
Countermeasure
- 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.
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.
Regulator
Nitrogen gas
Pressure 0.02 MPa
(2.9 psi) 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
occurred and it is a leakage cause.
Oxide scale
Nitrogen
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.
CAUTION
!
• Always use the nitrogen.(not use oxygen, carbon dioxide, and a
Chevron gas): Please use the following nitrogen pressure 0.02 MPa
(2.9 psi) 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.
•
Always use a pressure reducing valve.
• 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)