LG | A4UQ306FA2.AWGBASA | LG A4UQ306FA2.AWGBASA Owner’s 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.
TYPE : Multi Type
P/NO : MFL39817320
www.lg.com
Multi Type Air Conditioner Installation Manual
CONTENTS
Installation Requirements
Required Tools
Installation Parts Provided.........................................3
Safety Precautions..................................................4~5
Installation of indoor, outdoor unit .......................6~9
Flaring work and connection of piping.............10~17
Connecting the Cable between Indoor Unit and
Outdoor Unit ........................................................18~20
Checking the Drainage, Forming the Pipings
and Long pipe Setting ........................................21~24
o Level gauge
o Screw driver
o Electric drill
o Hole core drill (ø65mm)
o Horizontal meter
o Flaring tool set
o Specified torque wrenches
1.8kg.m, 4.2kg.m, 5.5kg.m, 6.6kg.m
(different depending on model No.)
o Spanner .................Half union
o A glass of water
o Screw driver
o Hexagonal wrench(4mm)
o Gas-leak detector
o Vacuum pump
o Gauge manifold
Air Purging and Evacuation...............................24~26
Installation PI485 .......................................................26
Test running...............................................................28
Installation guide at the seaside..............................29
2 Multi Air Conditioner
o Owner's manual
o Thermometer
o Holder Remote Control
Installation Parts Provided
Installation Parts Provided
Standard Type
Installation plate
Type "B" screws
(2EA)
Type "A" screw
Type "A" screw
(6 EA)
(8 EA)
Type "A" and "C" screw
(5 EA)
(2 EA)
Type "A" and "C" screw
(5 EA)
(2 EA)
Holder Remote Control
Installation Manual 3
Safety Precautions
Safety Precautions
To prevent injury to the user or other people and property damage, the following instructions
must be followed.
n Incorrect operation due to ignoring instruction will cause harm or damage. The seriousness
is classified by the following indications.
WARNING
This symbol indicates the possibility of death or serious injury.
CAUTION
This symbol indicates the possibility of injury or damage.
n Meanings of symbols used in this manual are as shown below.
Be sure not to do.
Be sure to follow the instruction.
WARNING
Do not disassemble or repair the product.
• Contact your dealer or service center.
Do not handle the flamable gas or explosive
materials near the product.
• Otherwise, it may cause fire or failure of
product.
Do not install the product on a defected
installation stand.
• Otherwise, It may cause injury or accident.
For installation, always contact the dealer
or service center.
• Otherwise, it may cause fire, electric shock,
explosion or injury."
Do not use damaged power cable.
• It will cause fire or electric shock.
4 Multi Air Conditioner
Always earth the product.
• It will cause fire or electric shock.
Do not install where flamable gas could
leak.
• Otherwise, it may cause esplosion or fire.
Be cautious when unpacking and installing
the product.
• Sharp edges could cause injury.
For electric work, contact the dealer or
service center.
• Otherwise, It will cause fire or electric shock.
Always intstall a circuit breaker and main
breaker.
• No installation may cause fire and electric
shock.
Safety Precautions
Do not touch(operate) product with wet
hands.
• Otherwise, it may cause fire or electric shock.
Do not put the heater, etc. near the power
cable.
If strange sound, smell or smoke come from
product, turn the breaker off.
• Otherwise, it may cause electric shock or fire.
Cover the electric part.
• Otherwise, it may cause fire and electric shock. • Otherwise, it may cause fire or electric shock.
Do not turn the breaker on/off during
operation.
Do not open the suction inlet of the product
during operation.
• Otherwise, it may cause fire or electric shock.
Do not touch the metal parts of the product
when removing the air filter.
• Otherwise, it may cause personal injury.
• Otherwise, it may cause electric shock or
failure.
Do not step or put anyting on the product.
• Otherwise, it may cause personal injury and
failure of product.
Fix the outdoor unit on the floor.
• Otherwise, it can be blown away by the strong
wind. It will cause injury or accident.
CAUTION
Always inspect gas leakage after
installation and repair of product.
• Otherwise, it may cause failure of product.
Keep the level even while installing the
product.
• Otherwise, it may cause vibration or water
leakage.
Install the drain hose to ensure that drain
can be securely done.
• Otherwise, it may cause water leakage.
Do not install the product where the noise
or hot wind from the outdoor unit could
give any casualty to the neighborhood
• Otherwise, it may cause dispute with the
neighborhoods.
Installation Manual 5
Installation of Indoor, Outdoor Unit
Installation of Indoor, Outdoor Unit
Read completely, then follow step by step.
Select the best location
Indoor unit
1. Do not allow any heat or steam to be near
the unit.
2. Select a place where there are no obstacles
in front of the unit.
3. Make sure that condensation drainage can
be conveniently routed outdoors.
4. Install as far away from a doorway as
possible for better performance.
5. Ensure the unit is unobstructed, allow proper
space on all sides according to the arrows
and distance measurements in the figure at
right.
6. Use a stud finder to locate studs to prevent
unnecessary damage to the wall.
More than 200mm
More than
100mm
More than
100mm
More than
100mm
More than 200mm
More than
100mm
Outdoor unit
1. If an awning is built over the unit to prevent
direct sunlight or rain exposure, make sure
that heat radiation from the heat pump is not
restricted.
2. Ensure the unit is unobstructed, allow proper
space on all sides according to the arrows
and distance measurements in the figure at
right.
3. Do not allow animals or plants to remain the
in path of the discharging warm air.
4. Take the air conditioner weight into account
and select a place where noise and vibration
are minimum.
5. Select a place so that the warm air and sound
from the air conditioner does not disturb
neighbors.
Rooftop Installations:
If the outdoor unit is installed on a rooftop, be
sure to level the unit. Ensure the rooftop and
anchoring method are adequate for the unit
location. Consult local codes regarding rooftop
mounting.
6 Multi Air Conditioner
More than
300mm
More than
700mm
More than
300mm
More than
600mm
h The figure may be slightly different according
to the model.
Installation of Indoor, Outdoor Unit
Fixing Installation Plate
The wall you select should be strong and
solid enough to prevent vibration
1. Mount the installation plate on the wall with
type "A" screws. If mounting the unit on a
concrete wall, use anchor bolts.
• Mount the installation plate horizontally by
aligning the centerline using a level.
2. Measure the wall and mark the centerline.
It is also important to use caution
concerning the location of the installation
plate-routing of the wiring to power outlets
is through the walls typically. Drilling the
hole through the wall for piping connections
must be done safely.
Installation Plate
Chassis
Hook
<Type 1>
Type “A”
Installation Plate
Chassis
Hook
<Type 2>
Type “A”
Installation Plate
Ø70
90
Left rear piping
<Type 1>
110
110
Installation plate
Ø70
70
Right rear piping
Type "A" Screws
Chassis
Hook
<Type 3>
Installation plate
Installation Plate
Ø70
Ø70
133
Chassis
Hook
100
Left rear piping
Unit Outline
442
<Type 2>
Right rear piping
<Type 4>
Place a level on raised tab
Place a level on raised tab
Unit Outline
460
570
442
Ø70
Left
rear
piping
Type "A" Screws
Ø70
Installation Plate
95
217
133
175
Right
rear
piping
Ø70
Left
rear
piping
Installation Plate
Measuring Tape
69
105
Ø70
Right
rear
56 piping
207
Measuring Tape
Hanger
<Type 4>
<Type 3>
(Unit : mm)
Indoor Type
Wall mounted
ART COOL Mirror
Capacity (kBtu/h)
Type
9,12
3
18,24
4
9,12
1
18,24
2
Installation Manual 7
Installation of Indoor, Outdoor Unit
Drill a hole in the wall
• Drill the piping hole with a ø70mm hole core
drill. Drill the piping hole at either the right or
the left with the hole slightly slanted to the
outdoor side.
Standard / Artcool Mirror type
WALL
Outdoor
5-7mm
Indoor
Piping length and elevation
Multi Piping Type
(Unit: m)
Capacity(kBtu/h)
Total Length
Max Length(A/B)
18
26
30
50
70
70
25
25
25
Max Elevation
(h1)
15
15
15
In - In Elevation
(h2)
7.5
7.5
7.5
Distributor Type
(Unit: m)
Capacity
(kBtu/h)
Total Length
40
48
56
100
135
145
Max Main Pipe Total Branch
Length (A/B) Pipe Length
50
55
55
Max Branch Max Elevation In - In Elevation
(h1)
(h2)
Pipe Length
50
80
90
15
15
15
A
30
30
30
15
15
15
Branch Pipe
Distributor
A
Distributor
h2
h2
h1
h1
Main Pipe
B
Multi Piping Type
8 Multi Air Conditioner
B
Distributor Type
Installation of Indoor, Outdoor Unit
Refrigerant charge
The calculation of the additional charge should be taken in account for the length of extra pipe.
Multiple Piping Models
Standard
length(m)
7.5
7.5
7.5
Model
18
26
30
Max piping for
one room(m)
25
25
25
Max total Piping
Length(m)
50
70
70
Additional
Charge(g/m)
20
20
20
Distributor type Models
Main Piping length
Standard
Additional
length(m)
refrigerant(g/m)
5
50
5
50
5
50
Model
40
48
56
Branch piping length
Standard
Additional
length(m)
refrigerant(g/m)
5
20
5
20
5
20
■ Multiple Piping Models
Additional charge (g) = ((A Room Installation Length – Standard Length ) x 20g/m
+ (B Room Installation Length – Standard Length ) x 20g/m +.. )
- CF(Correction Factor) x 150
❈ CF = Max. number of connectable indoor unit – Total number of connected indoor unit
■ Distributor type Models
Additional charge (g) = (( Total Main piping Length - Main Standard Length ) x 50g/m
+ (A Room Branch Length – Standard Length ) x 20g/m
+ (B Room Branch Length – Standard Length ) x 20g/m
+ (C Room Branch Length – Standard Length ) x 20g/m +.. )
- CF(Correction Factor) x 100
❈ CF = Max. number of connectable indoor unit – Total number of connected indoor unit
Additional Charge Calculation Example-1
• Total main pipe(A+B+C) = 30m
• Each branch pipe
a = 10m
b = 8m
c = 5m
d = 3m
e = 10m
Ex) A7UQ406FA1
A
A
C
a
b
c
9k
9k
9k
❖ Additional Charge
=((30-5) x 50 + (10-5) x 20 + (8-5) x 20
B
+ (5-5) x 20 + (3-5) x 20 + (10-5) x 20)
- (7-5) x 100 = 1270g
d
e
9k
9k
Installation Manual 9
Flaring Work and Connection of Piping
Flaring Work and Connection of Piping
Flaring work
Main cause for gas leakage is due to defect in flaring work. Carry out correct flaring work in the
following procedure.
Cut the pipes and the cable.
1. Use the piping kit accessory or the pipes
purchased locally.
2. Measure the distance between the indoor and
the outdoor unit.
Copper
pipe
Slanted Uneven Rough
90°
3. Cut the pipes a little longer than measured
distance.
4. Cut the cable 1.5m longer than the pipe length.
Burrs removal
Pipe
1. Completely remove all burrs from the cut cross
section of pipe/tube.
Reamer
2. Put the end of the copper tube/pipe in a
downward direction as you remove burrs in
order to avoid dropping burrs into the tubing.
Point down
Putting nut on
Flare nut
• Remove flare nuts attached to indoor and
outdoor unit, then put them on pipe/tube having
completed burr removal.
(not possible to put them on after flaring work)
Copper tube
Flaring work
Outside diameter
mm
inch
Ø6.35
1/4
Ø9.52
3/8
Ø12.7
1/2
Ø15.88
5/8
Ø19.05
3/4
10 Multi Air Conditioner
A
mm
1.1~1.3
1.5~1.7
1.6~1.8
1.6~1.8
1.9~2.1
Bar
Handle
"A"
• Carry out flaring work using flaring tool as shown
below.
• Firmly hold copper pipe in a die in the dimension
shown in the table above.
Bar
Yoke
Cone
Copper pipe
Clamp handle
Red arrow mark
Flaring Work and Connection of Piping
Check
1. Compare the flared work with figure below.
Smooth all round
Inside is shiny without scratches
2. If flare is noted to be defective, cut off the
flared section and do flaring work again.
= Improper flaring =
Even length
all round
Inclined Surface Cracked Uneven
damaged
thickness
Connection of piping - Indoor
Preparing the indoor unit's piping and drain hose for installation through the wall.
1. Route the indoor tubing and the drain hose in the direction of rear left or right
Drain hose
Drain hose
2. Tape the tubing, drain hose and the connecting cable. Be sure that the drain hose is located at
the lowest side of the bundle. Locating at the upper side can cause drain pan to overflow inside
the unit.
Tape
Connecting
pipe
Tape
Connecting
pipe
Drain hose
Drain hose
Connecting cable
Connecting cable
CAUTION: If the drain hose is routed inside the room, insulate the hose with
an insulation material* so that dripping from "sweating"(condensation) will
not damage furniture or floors.
*Foamed polyethylene or equivalent is recommended.
Installation Manual 11
Flaring Work and Connection of Piping
Indoor unit installation
1. Hook the indoor unit onto the upper portion of
the installation plate.(Engage the two hooks
of the rear top of the indoor unit with the
upper edge of the installation plate.) Ensure
that the hooks are properly seated on the
installation plate by moving it left and right.
Press the lower left and right sides of the unit
against the installation plate until the hooks
engage into their slots(clicking sound).
Connecting
cable
Drain hose
Indoor unit tubing
Flare nut
Pipings
Connecting the pipings to the in door
unit and drain hose to drain pipe
Spanner (fixed)
1. Align the center of the pipings and sufficiently
tighten the flare nut by hand.
2. Tighten the flare nut with a wrench.
Outside diameter
mm
inch
Ø6.35
1/4
Ø9.52
3/8
Ø12.7
1/2
Ø15.88
5/8
Ø19.05
3/4
Torque
kg.m
1.8~2.5
3.4~4.2
5.5~6.6
6.6~8.2
9.9~12.1
Flare nut
Torque wrench
Connection pipe
Indoor unit tubing
Drain pipe
Indoor unit drain hose
3. When extending the drain hose at the indoor
unit, install the drain pipe.
Adhesive
Vinyl tape(narrow)
Plastic bands Insulation material
Wrap the insulation material around
the connecting portion.
1. Overlap the connection pipe insulation
material and the indoor unit pipe insulation
material. Bind them together with vinyl tape
so that there is no gap.
2. Wrap the area which accommodates the rear
piping housing section with vinyl tape.
Indoor
unit pipe
Connection
pipe
Vinyl tape
Wrap with vinyl tape
(wide)
Connecting cable
Pipe
Vinyl tape(narrow)
* Insulate the connection pipe with an insulation
material so that dripping from "sweating"
(condensation) will not damage furniture or
floors.
A minimum thickness of 9mm insulation
material is required.
12 Multi Air Conditioner
Insulation material
Connection Pipe
9mm
Flaring Work and Connection of Piping
3. Bundle the piping and drain hose together by
wrapping them with vinyl tape over the range
within which they fit into the rear piping
housing section.
Wrap with vinyl tape
Pipe
Vinyl tape(wide)
Drain hose
CAUTION: Installation Information (For right piping)
For right piping, follow the instruction below.
Good case
Bad case
• Press on the upper side of clamp and unfold
the tubing to downward slowly.
• Following bending type from left to right could
cause problem of pipe damage.
Connection of piping - Outdoor
Align the center of the piping and sufficiently
tighten the flare nut by hand.
9k, 12k
18k, 24k
Finally, tighten the flare nut with torque wrench
until the wrench clicks.
Outdoor unit
Main gas
side valve
• When tightening the flare nut with torque
wrench ensure the direction for tightening
follows the arrow on the wrench.
Outside diameter
mm
inch
Ø6.35
1/4
Ø9.52
3/8
Ø12.7
1/2
Ø15.88
5/8
Ø19.05
3/4
A
mm
1.8~2.5
3.4~4.2
5.5~6.6
6.6~8.2
9.2~12.1
Main liquid
side valve
Liquid
side
piping
Gas side
piping
h The figure may be slightly different according
to the model.
Installation Manual 13
Flaring Work and Connection of Piping
• For the units with capacity more than 48 kBtu/h,
the installation piping is connectable in four
directions.(refer to figure 1)
• When connecting in a downward direction, knock
out the knockout hole of the base pan.
(refer to figure 2)
Continuous
Preventing foreign objects from entering
(Figure3)
• Plug the pipe through-holes with putty or
insulation material(procured locally)to stop up all
gaps,as shown in the figure 3.
• Insects or small animals entering the outdoor unit
may cause a short circuit in the electrical box.
Torque wrench
Outdoor unit
<Figure 1>
<Figure 3>
Liquid side piping
(Smaller Dia.)
Gas side piping
(Bigger Dia.)
Connecting wire
Drain hose
Backward
Connection pipe
Downward
Sideways
Forward
Putty or insulating material
(produced locally)
<Figure 2>
Knock-out
14 Multi Air Conditioner
Base pan
Flaring Work and Connection of Piping
Branch
[unit:mm]
Model
Gas Pipe
Liquid Pipe
Ø19.05
Ø19.05
PMBL5620
Ø9.52
Ø9.52
Ø9.52
Ø19.05
PMBL1203F0
Ø9.52
Ø9.52
Ø19.05
Y branch
A To Outdoor Unit
B
A
B To BD Unit
• Ensure that the branch pipes are attached horizontally or vertically (see the diagram
below.)
Horizontal
plane
Facing upwards
Within +/- 10°
A
Viewed from point A
in direction of arrow
• Branch pipe should be insulated with the insulator in each kit.
Tape
(field supply)
Insulator
(included with kit)
Liquid and gas
pipe joints
Insulator for
field piping
Insulation
Insulation
Tape
(field supply)
Tape(field supply)
Insulation
Tape(field supply)
Tape(field supply)
Insulation
Installation Manual 15
Flaring Work and Connection of Piping
Installation
• This unit may be installed suspended from the ceiling or mounted on the wall.
• This unit may only be installed horizontally , as shown in the diagram below.(Side B is facing up)
However, it may be freely installed in any direction forward or back, and to the sides.
• Be sure to leave a 600mm square opening for service and inspection as shown in the diagram
below, for both ceiling - suspended installation and wall-mounted installation.
• This unit "does not require drain treatment" as it uses internal foam treatment as low-pressure
piping insulation.
• Service direction is the side B and C
• The piping for the indoor unit may be led around in direction A
• The inclination of side B must be within ±5 degrees forward or back or to the sides.
Ø9.52
(337)
A
250
(298)
Ø19.05
245
Suspension bolt pitch.
B
Main Pipe
30 50
(111)
(38) 50
(150)
(36) 50 50 50
72
(56) 50 50 50
300
60
C
Cover Control
Min 400
(Servicing space)
Min 300
Min 30
Min 400
Branch Pipe
Inspection opening
600
16 Multi Air Conditioner
Flaring Work and Connection of Piping
Installation of The Main Unit
NOTICE
:
• This unit has two different installation types:
(1) Ceiling-suspended type and (2) wall-mounted
type.
• Choose the proper installation pattern according to
the location of installation.
• The installation location for printed wiring board can
be changed.
Follow the procedure specified in the "CONNECTING
THE WIRING" section to change the location.
(1) Ceiling-suspended type
(1) Ceiling-suspended type
(2) Wall-mountde type
Procedure
(1) Fix the furnished hanger metal with two screws.(4 locations
in total).
(2) Using an insert-hole-in- anchor, hang the hanging bolt.
(3) Install a hexagon nut and a flat washer (locally-procured)to
the hanging bolt as shown in the figure in the left, and lift the
main unit to hang on the hanger metal.
(4) After checking with a level that the unit is level, tighten the
hexagon nut.
* The tilt of the unit should be within ±5° in front/back and
left/right.
BD unit
Six-sided Nut
(M10 or M8)
15.00
Hanger metal
Flat washer
washer
Hanging bolt
(M10 or M8)
(2) Wall-mounted type
Procedure
(1) Fix the furnished hanger metal with two screws.
(3 locations in total).
(2) After checking with a level that the unit is level, fix the
unit with the furnished wood screws.
* The tilt of the unit should be within ±5° in front/back and
left/right.
PE
PE
Screws(M5)
Screws(M5)
(locally procude)
* Block up the parts of hanger holes (2 places) by using
insulation PE after installing the hanger.
CAUTIONS
• Once a screw-hole on the main unit has had a screw hammered in, make sure to either hammer it again
or cover it with alumium tape.(This is to prevent condensation)
• Be sure to install the unit with the ceiling-side up.
• Do not install near bedrooms. the sound of refrigerant flowing through the piping may sometimes be audible.
Installation Manual 17
Connecting the Cable between Indoor Unit and Outdoor Unit
Connecting the Cable between Indoor Unit and Outdoor Unit
Connect the cable to the Indoor unit.
Connect the cable to the indoor unit by connecting the wires to the terminals on the control
board individually according to the outdoor unit connection. (Ensure that the color of the wires
of the outdoor unit and the terminal No. are the same as those of the indoor unit.)
The earth wire should be longer than the common wires.
The circuit diagram is not subject to change without notice.
When installing, refer to the circuit diagram behind the panel front of Indoor Unit the wiring
diagram on the Control Cover Inside Outdoor Unit.
CAUTION:
• The circuit diagram is not subject to change without notice.
• Be sure to connect wires according to the wiring diagram.
• Connect the wires firmly, so that not to be pulled out easily.
• Connect the wires according to color codes by referring the wiring diagram.
CAUTION: Provide a circuit
breaker between power source
and the unit as shown below.
Main power source
Circuit Breaker
Use a circuit breaker
or time delay fuse.
Air
Conditioner
CAUTION: The power cord connected to the outdoor unit should be complied
with the following specifications (Cable type approved by HAR or SAA).
(mm2)
Capacity
(kBtu/h)
NORMAL CROSS
SECTIONAL
AREA
18
26
30
40
48
56
2.5
2.5
2.5
3.5
4.0
4.0
Cable Type
GN
/YL
20
H07RN-F
mm
ø7.5mm
The power connecting cable connected to the indoor and outdoor unit
should be complied with the following specifications (Type "B" approved by
HAR or SAA).
GN
/YL
20
mm
NORMAL
CROSS-SECTIONAL
AREA 0.75mm2
H07RN-F
18 Multi Air Conditioner
Connecting the Cable between Indoor Unit and Outdoor Unit
Connect the cable to the Outdoor unit.
1. Remove the cover control from the unit by
loosening the screw.
Connect the wires to the terminals on the
control board individually as the following.
2. Secure the cable onto the control board with
the holder (clamper).
3. Refix the cover control to the original position
with the screw.
4. Use a recongnized circuit breaker between
the power source and the unit. A
disconnection device to adequately
disconnect all supply lines must be fitted.
1Ø Models
Outdoor unit
Holder for
power supply
cable
Terminal block
Cover
control
Power cord
Connecting
cable
Loosen terminal screw
Capacity
(kBtu/h)
18
26
30
40
48
56
Circuit
Breaker
(A)
20
25
25
30
40
40
Terminal block
CAUTION: After the confirmation of the above conditions, prepare the wiring
as follows.
1. Never fail to have an individual power circuit specifically for the air conditioner. As
for the method of wiring, be guided by the circuit diagram posted on the inside of
control cover.
2. Firmly tighten the terminal screws to prevent them loosening. After tightening, pull
the wires lightly to confirm that they do not move. (If they are loose the unit, the unit
will not operate normally or it can cause burn-out of the wires.)
3. Specification of power source.
4. Confirm that electrical capacity is sufficient.
5. See to that the starting voltage is maintained at more than 90 percent of the rated
voltage marked on the name plate.
6. Confirm that the cable thickness is as specified in the power source specification.
(Particularly note the relation between cable length and thickness.
7. Do not install an earth leakage circuit breaker in a wet or moist area.
8. The following would be caused by voltage drop.
• Vibration of a magnetic switch, which will damage the contact point, fuse breaking,
disturbance of the normal function of the overload.
9. The means for disconnection from a power supply shall be incorporated in the fixed
wiring and have an air gap contact separation of at least 3mm in each active(phase)
conductors.
Installation Manual 19
Connecting the Cable between Indoor Unit and Outdoor Unit
Connection of Wiring
• Connect refrigerant pipes and connection wires to the appropriate ports maked with matching
alphabets (A, B and C) on this unit.
• Follow the instructions on the wiring nameplate to connect the connection wires of indoor/outdoor
units to terminal board numbers.(1, 2 and 3) Always fix each ground wire separately with a ground
screw.(See the figure below.)
• After completing the wiring, fix the outer coating of wires securely with wire clamps. The wire
clamp on indoor unit side is furnished. Follow the procedure below to install.
• Refer to the circuit diagram on the control cover inside outdoor unit.
NOTICE
:
The terminal board numbers are arranged from top to bottom in order of 1, 2 and 3.
In Case of 3 rooms
Warning
A room
Do not use tapped wires,
stand wires, extensioncords,
or starbust connections, as
they may cause
overtheating, electrical
shock, or fire.
A
B room
B
C room
C
CN-PWR
Connection wire for indoor units
(H05VV, 4wires, 0.75mm)
Connection wire for outdoor units
(H05RV, 4wires, 1.2mm)
(1) Remove the control cover. Loosen the two
screws, and slide the cover in the direction
of the arrow.
(3) Put in the cover in the direction of the arrow
then tighten the screws.
(2) Perform wiring with reference the wiring
diagram on a control cover of outdoor unit.
Allow 300 mm for the pulling-out section of
harness. Fix the wires completely with wire
clamps(4 locations).
20 Multi Air Conditioner
Checking the Drainage, Forming the Pipings and Long Pipe Setting
Checking the Drainage, Forming the Pipings and Long Pipe Setting
Checking the drainage
To check the drainage.
1. Pour a glass of water on the evaporator.
Connecting area
drain hose
2. Ensure the water flows through the drain
hose of the indoor unit without any leakage
and goes out the drain exit.
Leakage
checking
Drain pan
Drain
hose
Leakage
checking
Drain piping
1. The drain hose should point downward for
easy drain flow.
Downward slope
2. Do not make drain piping.
Accumulated
drain water
Air
Do not raise
Water
leakage
Water
leakage
Waving
Tip of drain hose
dipped in water
Water
leakage
Less than
50mm gap
Ditch
Installation Manual 21
Checking the Drainage, Forming the Pipings and Long Pipe Setting
Forming the piping
Form the piping by wrapping the
connecting portion of the indoor
unit with insulation material and
secure it with two kinds of vinyl
tape.
• If you want to connect an additional drain
hose, the end of the drain outlet should be
routed above the ground. Secure the drain
hose appropriately.
Seal a small
opening around
the pipings with
gum type sealer.
Taping
Drain hose
Plastic
band
In cases where the outdoor unit is
installed below the indoor unit
perform the following.
1. Tape the piping, drain hose and connecting
cable from down to up.
2. Secure the tapped piping along the
exterior wall using saddle or equivalent.
In cases where the Outdoor unit is
installed above the Indoor unit
perform the following.
1. Tape the piping and connecting cable from
down to up.
2. Secure the taped piping along the exterior
wall. Form a trap to prevent water entering
the room.
3. Fix the piping onto the wall by saddle or
equivalent.
22 Multi Air Conditioner
Pipings
Power supply
cord
• Trap is required to prevent water from entering
into electrical parts.
Seal a small opening
around the pipings
with gum type sealer.
Trap
Trap
Checking the Drainage, Forming the Pipings and Long Pipe Setting
Current limit switch setting and long pipe setting
h The function referred below is differently applied to model.
- Set the dip switch to a long pipe mode when the length of total pipes is over standard pipe of
each model.
- Set the dip switch to a changing ampere limitation mode when the current is limited by regulation.
h Please turn off main power while changing long pipe or current limit setting, and wait 3~5
minutes until residual electricity discharges.
1. Open the top cover of outdoor unit.
2. Select one of the two selectable modes as follows.
3. Set the Zone as shown in Fig.
4. Close the top cover and check whether the product works normally.
WARNING: Do NOT open the top cover or set the pipe length while
operating the product.
h Changing ampere limitation mode.
h Long pipe setting mode.
18kBtu/h, 24kBtu/h, 30kBtu/h
18kBtu/h, 24kBtu/h, 30kBtu/h
40kBtu/h
ON
1
2
3
4
2
3
4
No limitation
ON
ON
Part load A
ON
1
1
ON
Part load B
1
2
3
2
3
2
3
4
4
SW01N
SW01N
4
48kBtu/h, 56kBtu/h
Operation current (A)
Capacity(Btu/h)
Part load A
Part load B
18k
8.5
11
26k
8.5
11
30k
11
17
ON
2
3
4
5
h Factory default setting is all-off.
1
1
Installation Manual 23
Air Purging and Evacuation
Air Purging and Evacuation
Air and moisture remaining in the refrigerant system have undesirable effects as indicated below.
1. Pressure in the system rises.
2. Operating current rises.
3. Cooling(or heating) efficiency drops.
4. Moisture in the refrigerant circuit may freeze and block capillary tubing.
5. Water may lead to corrosion of parts in the refrigeration system.
Therefore, the indoor/outdoor unit and connecting tube must be checked for leak tight, and
vacuumed to remove incondensible gas and moisture in the system.
Checking method
Preparation
• Check that each tube(both liquid and gas side
tubes) between the indoor and outdoor units have
been properly connected and all wiring for the test
run has been completed. Remove the service
valve caps from both the gas and the liquid side
on the outdoor unit. Check that both the liquid and
the gas side service valves on the outdoor unit
are kept closed at this stage.
Leakage test
1. Do a leakage test of all joints of the
tubing(both indoor and outdoor) and both gas
and liquid side service valves.
Bubbles indicate a leak. Be sure to wipe off
the soap with a clean cloth.
2. After the system is found to be free of leaks,
relieve the nitrogen pressure by loosening
the charge hose connector at the nitrogen
cylinder. When the system pressure is
reduced to normal, disconnect the hose from
the cylinder.
• Connect the manifold valve(with pressure gauges)
and dry nitrogen gas cylinder to this service port
with charge hoses.
CAUTION: Be sure to use a
manifold valve for leakage test.
If it is not available, use a stop valve for
this purpose. The "Hi" knob of the
manifold valve must always be kept
close.
• Pressurize the system to no more than 150
P.S.I.G. with dry nitrogen gas and close the
cylinder valve when the gauge reading
reached 150 P.S.I.G. Next, test for leaks with
liquid soap.
CAUTION: To avoid nitrogen
entering the refrigerant system in a
liquid state, the top of the cylinder must be
higher than its bottom when you
pressurize the system. Usually, the cylinder
is used in a vertical standing position.
24 Multi Air Conditioner
Indoor unit
Outdoor unit
Manifold valve
Lo
Hi
Pressure
gauge
Charge hose
Nitrogen gas
cylinder(in vertical
standing position)
Air Purging and Evacuation
Evacuation
1. Connect the charge hose end described in the
preceding steps to the vacuum pump to
evacuate the tubing and indoor unit.
Confirm the "Lo" knob of the manifold valve is
open. Then, run the vacuum pump.
The operation time for evacuation varies with
tubing length and capacity of the pump. The
following table shows the time required for
evacuation.
Indoor unit
Required time for evacuation when 30 gal/h vacuum
pump is used
If tubing length is longer
If tubing length is less
than 10m (33ft)
than 10m (33ft)
Less than 0.5 Torr
Less than 0.5 Torr
2. When the desired vacuum is reached, close the
"Lo" knob of the manifold valve and stop the
vacuum pump.
Outdoor unit
Finishing the job
1. With a service valve wrench, turn the valve stem of
liquid side valve counter-clockwise to fully open the
valve.
2. Turn the valve stem of gas side valve counterclockwise to fully open the valve.
3. Loosen the charge hose connected to the gas side
service port slightly to release the pressure, then
remove the hose.
4. Replace the flare nut and its bonnet on the gas
side service port and fasten the flare nut securely
with an adjustable wrench. This process is very
important to prevent leakage from the system.
5. Replace the valve caps at both gas and liquid side
service valves and fasten them tight.
This completes air purging with a vacuum pump.
The air conditioner is now ready to test run.
Manifold valve
Lo
Pressure
gauge
Hi
Open
Open
Vacuum pump
Installation Manual 25
Installation PI485
Installation PI485
• Fix the PI485 PCB as shown in Fig.
Detailed installation method refer to PI485 Installation Manual.
18kBtu/h
26kBtu/h
30kBtu/h
26 Multi Air Conditioner
Installation PI485
40kBtu/h
48kBtu/h
56kBtu/h
Installation Manual 27
Test Running
Test Running
1. Check that all tubing and wiring have been properly connected.
2. Check that the gas and liquid side service valves are fully open.
Prepare remote control
Remove the battery cover by pulling it
according to the arrow direction.
Insert new batteries making sure that the (+)
and (–) of battery are installed correctly.
Reattach the cover by pushing it back into
position.
Bolt
:
• Use 2 AAA(1.5volt) batteries. Do not use
rechargeable batteries.
• Remove the batteries from the remote control
if the system is not going to be used for a long
time.
NOTICE
Tubing connection
Evaluation of the performance
Operate unit for 15~20 minutes, then check the
system refrigerant charge:
Intake temperature
1. Measure the pressure of the gas side service
valve.
2. Measure the temperature of the intake and
discharge of air.
Discharge air
3. Ensure the difference between the intake
temperature and the discharge is more than
8°C
Discharge
temperature
4. For reference, the gas side pressure of
optimum condition is as below.(Cooling)
Refrigerant Outside ambient
TEMP.
Intake temperature
The pressure of the gas side
service valve.
R410A
35°C (95°F) 8.5~9.5kg/cm2G(120~135 P.S.I.G.)
NOTICE
: If the actual pressure are higher than
shown, the system is most likely overcharged, and charge should be
removed. If the actual pressure are
lower than shown, the system is most
likely undercharged, and charge should
be added.
The air conditioner is now ready for use.
28 Multi Air Conditioner
Discharge air
Discharge
temperature
Installation guide at the seaside
Installation guide at the seaside
CAUTION
1. Air conditioners should not be installed in areas where corrosive gases, such as acid or alkaline gas, are produced.
2. 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.
3. 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.
Selecting the location(Outdoor Unit)
1) 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.
Sea wind
Sea wind
2) In case, to install the outdoor unit on the seaside, set up a windbreak not to be exposed to the sea wind.
Windbreak
• 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.
Sea wind
• It should be keep more than 70 cm of space
between outdoor unit and the windbreak for easy
air flow.
3) Select a well-drained place.
1. If you can’t meet above guide line in the seaside installation, please contact LG Electronics for the additional anticorrosion treatment.
2. Periodic ( more than once/year ) cleaning of the dust or salt particles stuck on the heat exchanger by using water
Installation Manual 29
Memo
30 Multi Air Conditioner
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