LG B70AWYN985 User manual

P/NO : MFL41755813 www.lg.com
INSTALLATION MANUAL
AIR CONDITIONER
• Please read this installation manual completely before installing the product.
• Installation work must be performed in accordance with the national wiring
standards by authorized personnel only.
• Please retain this installation manual for future reference after reading it
thoroughly.
TYPE : CEILING CONCEALED DUCT
MODEL : B70AWYN985 / B70AWYUX85
ENGLISH

2TABLE OF CONTENTS
ENGLISH
3INTRODUCTION
3Tips for saving energy
4Important safety instructions
6Installation process
7Features
8Environment-friendly alternative
refrigerant R-410A
9INSTALLATION PLACE
10 Indoor unit installation place
11 Outdoor unit installation place
12 Installation guide at the seaside
13 PRODUCT INSTALLATION
13 Indoor unit installation
15 Separating work of the indoor unit
(if required)
16 Checking the Drainage
18 Lifting method of the outdoor unit
19 The outdoor unit installation
19 The location of the Anchor bolts for
outdoor unit
20 Foundation for outdoor unit installation
21 PIPE CONNECTION
21 Pipe length and the elevation
22 Preparation of Pipe
23 Preparation Work for piping
24 Pipe Drawing Out during Single
connection
25 Thermal insulation of refrigerant pipe
27 Forming the pipe
28 Leakage test and evacuation
28 Preparation for leakage test and
evacuation
28 Leakage test
29 Vacuum
30 WIRING
30 Electrical Wiring
30 Precautions when laying power wiring
cable
31 Indoor unit wiring
31 Outdoor unit wiring
32 Communication and Power wiring cable
33 Wiring of main power supply and
equipment capacity
34 Field Wiring
35 Connecting the DRED to the outdoor
unit
37 Wired remote controller installation
38 Location of remote controller
39 SETTING & TEST
40 Installer Setting - E.S.P Function
41 Precaution in test running
41 Check the following tiems when installa-
tion is complete
41 Connection of power wiring cable
41 Evaluation of the performance
43 Self-diagnosis function
47 Dip switch setting
49 ACCESSORY GUIDE
49 Dry Contact(PQDSB1)
50 WLAN module imstallation
(PWFMDD101)
51 Damper Controller(PBZC80)
52 Remote Temperature Sensor(PQRSTA0)
53 Two wired remote controller
TABLE OF CONTENTS

INTRODUCTION
ENGLISH
3
• 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 condition-
er is used for many hours.
• Clean the air filter once every 2 weeks. Dust and impurities collected in the air filter may block the
air flow or weaken the cooling / dehumidifying functions.
For your records
Staple your receipt to this page in case you need it to prove the date of purchase or for warranty
purposes. Write the model number and the serial number here:
Model number :
Serial number :
You can find them on a label on the side of each unit.
Dealer’s name :
Date of purchase :
Here are some tips that will help you minimize the power consumption when you use the air
conditioner. You can use your air conditioner more efficiently by referring to the instructions
below:
Tips for saving energy
INTRODUCTION

4INTRODUCTION
ENGLISH
Important safety instructions
READ ALL INSTRUCTIONS BEFORE USING THE APPLIANCE.
Always comply with the following precautions to avoid dangerous situations and ensure peak
performance of your product
WARNING
It can result in serious injury or death when the directions are ignored
CAUTION
It can result in minor injury or product damage when the directions are ignored
WARNING
• Installation or repairs made by unqualified persons can result in hazards to you and others.
• Installation of all field wiring and components MUST conform with local building codes.
• 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 mal-
function, property damage, personal injury and/or death.
Installation
• Do not use a defective or underrated circuit breaker. Use this appliance on a dedicated circuit.
- There is risk of fire or electric shock.
• For electrical work, contact the dealer, seller, a qualified electrician, or an Authorized Service Center.
- Do not disassemble or repair the product. There is risk of fire or electric shock.
• Always ground the product.
- There is risk of fire or electric shock.
• Install the panel and the cover of control box securely.
- There is risk of fire or electric shock.
• Always install a dedicated circuit and breaker.
- Improper wiring or installation may cause fire or electric shock.
• Use the correctly rated breaker or fuse.
- There is risk of fire or electric shock.
• Do not modify or extend the power cable.
- There is risk of fire or electric shock.
• Do not let the air conditioner run for a long time when the humidity is very high and a door or a win-
dow is left open.
- Moisture may condense and wet or damage furniture.
• Be cautious when unpacking and installing the product.
- Sharp edges could cause injury. Be especially careful of the case edges and the fins on the con-
denser and evaporator.
• For installation, always contact the dealer or an Authorized Service Center.
- There is risk of fire, electric shock, explosion, or injury.
• Do not install the product on a defective installation stand.
- It may cause injury, accident, or damage to the product.
!
!
!

INTRODUCTION
ENGLISH
5
• 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,
and personal injury.
• 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.
Operation
• Do not store or use flammable gas or combustibles near the product.
- There is risk of fire or failure of product.
CAUTION
Installation
• Always check for gas (refrigerant) leakage after installation or repair of product.
- Low refrigerant levels may cause failure of product.
• Install the drain hose to ensure that water is drained away properly.
- A bad connection may cause water leakage.
• Keep level even when installing the product.
- To avoid vibration or water leakage.
• Do not install the product where the noise or hot air from the outdoor unit could damage the neigh-
borhoods.
- It may cause a problem for your neighbors.
• Use two or more people to lift and transport the product.
- Avoid personal injury.
• Do not install the product where it will be 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.
!

6INTRODUCTION
ENGLISH
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
In the final check for 24hours at 3.8 MPa(38.7 kgf/cm
2
) 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
Drainage pipe work
Special attention to dryness,
cleanness and tightness
Refrigerant pipe work
Check model name to make
sure the fitting is made correctly
Installation of indoor unit
Take account of gradient
of drainage pipe
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
• The above list indicates the order in which the individual work operations are normally car-
ried out but this order may be varied where local conditions warrants such change.
• The wall thickness of the pipe should comply with the relevant local and national regula-
tions for the designed pressure 3.8MPa.
• Since R-410A 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.)
CAUTION
!
Installation process

INTRODUCTION
ENGLISH
7
Air outlet vents
Air intake
vents
Air outlet vents
Air intake vents
Remote controller
(Accessory)
Features

8INTRODUCTION
ENGLISH
- The refrigerant R-410A has the property of
higher operating pressure in comparison with
R22.
Therefore, all materials have the characteris-
tics of higher resisting pressure than R22
ones and this characteristic should be also
considered during the installation.
R-410A is an azeotrope of R32 and R125
mixed at 50:50, so the ozone depletion
potential (ODP) of R-410A is 0. These days
the developed countries have approved it as
the environment-friendly refrigerant and
encouraged to use it widely to prevent envi-
ronment pollution.
• The wall thickness of the pipe should
comply with the relevant local and na-
tional regulations for the designed pres-
sure 3.8MPa
• Since R-410A 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 pre-
vent it from exploding.
• For high-pressure refrigerant, any unap-
proved pipe must not be used.
• Do not heat pipes more than necessary
to prevent them from softening.
• Be careful not to install wrongly to mini-
mize economic loss because it is ex-
pensive in comparison with R22.
CAUTION
!
Environment-friendly alternative refrigerant R-410A

INSTALLATION PLACE
ENGLISH
9
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 by noise
from unit
- No exposition to strong wind
- With strength which bears weight of unit
- Note that drain flows out of unit when heat-
ing
- 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 environ-
ment where oil, steam and sulfuric gas exist.
- It is recommended to fence round the out-
door 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 fol-
lowing conditions to avoid bad condition
when additionally performing defrost opera-
tion.
• Install the outdoor unit at a place well venti-
lated 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 sun-
shine.)
INSTALLATION PLACE

10 INSTALLATION PLACE
ENGLISH
Indoor unit installation place
- The place shall easily bear a load exceeding four times the indoor unit’s weight.
- The place shall be able to inspect the unit.
- The place where the unit shall be leveled.
- The place shall allow easy water drainage.
- The place shall easily connect with the outdoor unit.
- The place where the unit is not affected by an electrical noise.
- The place where air circulation in the room will be good .
- There should not be any heat source or steam near the unit
* Suitable dimension “H” is necessary to get a slope to drain.
H=200 or more
Top view
(unit: mm) Front view
(unit: mm)
Front
Inspection hole
Air Intake
(600 x 600)
Control box
1000
Air Outlet

INSTALLATION PLACE
ENGLISH
11
Outdoor unit installation place
- If an awning is built over the unit to prevent direct sunlight or rain exposure, make sure that
heat radiation from the condenser is not restricted.
- Ensure that the spaces indicated by arrows around front, back and side of the unit.
- Do not place animals and plants in the path of the warm air.
- Take the air conditioner weight into account and select a place where noise and vibration are
minimum.
- Select a place so that the warm air and noise from the air conditioner do not disturb neighbors.
Category Installation Space
Case1
(10mm≤ Side
Space ≤49mm)
Case2
(Side Space
≥49mm)
4 sides are walls
A≥10
B≥300
C≥10
D≥500
A≥50
B≥100
C≥50
D≥500
Only 2 sides are
walls
A≥10
B≥300
Limitations on the
height of the wall
(Refer to 4 side
walls)
• The height of the wall on the front side
must be 1500mm or less.
• The height of the wall on the intake side
must be 500mm or less.
• There is no limit to the wall on the side.
• If the height of the walls on the front
and the side are higher than the limit,
there must be additional space on the
front and the side.
- Additional Space on the intake side by
1/2 of h1.
- Additional Space on the front side by 1/2
of h2
- h2 = A(Actual height) - 1500
- h1 = B(Actual height) - 500
Front
No limit to the
height of the wall
Front
h
Front
1
h2
1500
A
B
500

12 INSTALLATION PLACE
ENGLISH
Selecting the location(Outdoor Unit)
If the outdoor unit is to be installed close to
the seaside, direct exposure to the sea wind
should be avoided. Install the outdoor unit on
the opposite side of the sea wind direction.
In case, to install the outdoor unit on the
seaside, set up a windbreak not to be
exposed to the sea wind.
- It should be strong enough like concrete to
prevent the sea wind from the sea.
- The height and width should be more than
150% of the outdoor unit.
- It should be keep more than 70 cm of space
between outdoor unit and the windbreak for
easy air flow.
Select a well-drained place.
Sea wind
Sea wind
Sea wind
Windbreak
• Periodic (more than once/year) cleaning
of the dust or salt particles stuck on the
heat exchanger by using water
• Air conditioners should not be installed
in areas where corrosive gases, such as
acid or alkaline gas, are produced.
• Do not install the product where it could
be exposed to sea wind (salty wind)
directly. It can result corrosion on the
product. Corrosion, particularly on the
condenser and evaporator fins, could
cause product malfunction or inefficient
performance.
• If outdoor unit is installed close to the
seaside, it should avoid direct exposure
to the sea wind. Otherwise it needs
additional anticorrosion treatment on the
heat exchanger.
CAUTION
!
Installation guide at the seaside

PRODUCT INSTALLATION
ENGLISH
13
Case1
Position of suspension Bolt
- Apply a joint-canvas between the unit and
duct to absorb unnecessary vibration.
- Apply a filter Accessory at air return hole.
Case2
Position of Console Bolt
- A place where the unit will be leveled and
that can support the weight of the unit.
- A place where the unit can withstand its
vibration.
- A place where service can be easily per-
formed.
- Select and mark the position for fixing bolts.
- Drill the hole for set anchor on the face of
ceiling.
Dimension
Capacity
A B C D E F G H I J K L
70 kBtu/h 1594 1044 286 464 657 821 1368 1622 392 458 1563 791
H
K
G
B
A
EF
C
D
L
I
J
Air Intake
Air Outlet
M10 Nut X 4
M10 SP. washer X 4
M10 washer X 4
(Local
supply)
M10 washer X 4
M10 SP. washer X 4
M10 Nut X 4
(Local
supply)
PRODUCT INSTALLATION
Indoor unit installation

14 PRODUCT INSTALLATION
ENGLISH
- 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 sus-
pension bolts (adjust level roughly) using
nuts, washers and spring washers.
• Local supply
①Set anchor
②Plate washer - M10
③Spring washer - M10
④Nut - W3/8 or M10
⑤Suspension bolt - W3/8 or M10
1 Set anchor
Old building New building
2 Plate washer
3 Spring washer
4 Nut
5 Suspension
bolts
Tighten the nut and bolt to prevent unit
falling.
CAUTION
!
Install declination of the indoor unit is
very important for the drain of the duct
type air conditioner. Always lay the in-
door unit with downward inclination
(0.8 ˚ to 1.3 ˚). Prevent any upward flow
or reverse flow in any part.
CAUTION
!
Ceiling
15mm~25mm
0.8 ˚~1.3 ˚
Drainage hole
Ceiling
Drainage hole
Ceiling
Drainage hole
CORRECT
INCORRECT

PRODUCT INSTALLATION
ENGLISH
15
Separating work of the indoor
unit (if required)
To install the indoor unit, it can be easily sepa-
rated into 2 sections by making it lighter to
carry and easier to maneuver through open-
ings and in the ceiling.
The method to separate the indoor
unit is as follows.
①Remove the two side lock straps.
②Unscrew the top cover of the fan deck sec-
tion.
③Unscrew the five bolts securing the two
sections.
④Remove the control box cover and unplug
the air and two heat exchanger thermistors
also unplug expansion valve cable.
⑤Carefully un-clip the three thermistor leads
and push the leads through the back of the
electrical box.
⑥Unscrew 5 screws and separate the heat
exchanger section from unit. Carefully un-
latch the heat exchanger section from the
fan deck section by lifting up the heat ex-
changer section and then pulling away. En-
sure that the thermistor or expansion valve
motor cables do not catch on either section
as the unit is separated.
⑦Unscrew the 5 screws and separate the
fan deck section from sub drain pan
Please separate the indoor unit only when
necessary. Please disassemble and re-
assemble on a flat surface.
CAUTION
!
Fan deck section
Heat exchanger
section
Side lock
strap
Fan deck
top cover
1
0
Fan deck section
Heat exchanger
section
2
4
3
Lift up
5
6

16 PRODUCT INSTALLATION
ENGLISH
Please be sure to secure two section with
5 screws. if one of screw is missing, it
could cause unbalance of product or capac-
ity degradation.
CAUTION
!
The method to rejoin the indoor unit
is as follows.
①Sub drain pan and the fan deck section to-
gether with the 5 screws.
②Carefully align the heat exchanger section
and fan deck section.
③Lift the heat exchanger section about
50mm, push it forward and then back
down And screw the 5 screws the heat ex-
changer section with unit.
④Secure the two sections together with the
5 bolts. Re-attach the side lock strap.
⑤Re-connect the unplugged cables.
Reassemble the control box cover.
⑥Carefully replace the fan deck section top
cover and secure the cover with the
screws.
Checking the Drainage
Checking the Drainage
* Check the drainage.
- Spray one or two glasses of water upon the
evaporator.
- Ensure that water flows drainage hose of
indoor unit without any leakage.
Lift up
1
Fan deck section
Heat exchanger
section
3
Side lock
strap
0
Fan deck section
Heat exchanger
section
Fan deck
top cover

PRODUCT INSTALLATION
ENGLISH
17
Caution for gradient of unit and
drainage pipe
Lay the drainage pipe hose with a downward
inclination so water will drain out.
Main drain
- Always lay the drainage with downward incli-
nation (0.8 ˚ to 1.3 ˚).
Prevent any upward flow or reverse flow in
any part.
- 10mm or thicker formed thermal insulator
shall always be provided for the drainage
pipe.
- Install the P-Trap (or U-Trap) to prevent a
water leakage caused by the blocking of
intake air filter.
- Upward routing not allowed
Safety drainage
- There is no need to provide a trap for the
safety drainage. If the safety drainage pipe is
connected to the main drainage pipe, make
the connection below the trap on the main
drainage pipe.
- Drill the pipe hole with 65mm dia, hole core
drill.
- Pipe hole should be slightly slant to the out-
door side.
U-Trap
B
C
A 70mm
B 2C
C 2 x SP
SP = External
Pressure
(mmAq)
Ex) External Pressure = 10mmAq
A 70mm
B 40mm
C 20mm
A
Safety
drainage pipe
Main
drainage pipe
Applied U-Trap Dimension
5~7mm
Indoor Outdoor
WALL
Drainage holeMake sure to be closed.
Unit
Drainage pipe
(Local supply)
Thermal insulator
(Local supply)
Drainage holeMake sure to be closed.
Unit
Drainage pipe
(Local supply)
Thermal insulator
(Local supply)

18PRODUCT INSTALLATION
ENGLISH
- When carrying the suspended, unit pass the
ropes under the unit and use the two sus-
pension 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
Be very careful while carrying the prod-
uct.
• Do not have only one person carry prod-
uct if it is more than 20 kg.
• PP bands are used to pack some prod-
ucts. Do not use them as a mean for
transportation because they are danger-
ous.
• 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. Oth-
erwise plastic packaging bag may suffo-
cate 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 unsta-
ble, resulting in a fall.
• Use 2 belts of at least 8 m long.
• Place extra cloth or boards in the loca-
tions where the casing comes in con-
tact with the sling to prevent damage.
• Hoist the unit making sure it is being
lifted at its center of gravity.
CAUTION
!
Capacity(kBtu/h) Weight(kg)
70 185
<Weight per Capacity>
Lifting method of the outdoor unit

PRODUCT INSTALLATION
ENGLISH
19
- Install at places where it can endure the
weight and vibration/noise of the outdoor
unit.
- The outdoor unit supports at the bottom shall
have width of at least 100mm under the
Unit’s legs before being fixed.
- The outdoor unit supports should have mini-
mum height of 200mm.
- Anchor bolts must be inserted at least
75mm.
At least 100mm At least 100mm
At least 100mm
At least 100mm
730
920
792
760
6565
Unit : mm
At least 65At least 65
The outdoor unit installation The location of the Anchor
bolts for outdoor unit

20 PRODUCT INSTALLATION
ENGLISH
Foundation for outdoor unit Installation
• 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
Ⓐ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
Unit : mm
200
75
75
200
100
• 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 treat-
ment (treatment of the water flowing out of the outdoor unit in operation), and the pas-
sages of the pipe and wiring, when making the ground support.
• Do not use tube or pipe for water outlet in the Base pan. Use drainage instead for water
outlet. The tube or pipe may freeze and the water may not be drained.
!WARNING !WARNING
• Be sure to remove the Pallet(Wood Support) of the
bottom side of the outdoor unit Base Pan before fix-
ing 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.
CAUTION
!
Pallet(Wood Support)
- Remove before Installation