LG L4UC608FA0 Installation guide

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LG
LG
Multi Type Air Conditioner
INSTALLATION MANUAL
IMPORTANT
• Please read this installation manual completely before
installing the product.
• When the power cord is damaged, replacement work shall
be performed by authorized personnel only.
• Installation work must be performed in accordance with
the national wiring standards by authorized personnel
only.
Multi Type Ceiling Duct Air Conditioner Installation Manual
TABLE OF CONTENTS
Installation Requirements
Required Tools
Installation Parts Provided .........................................3
Safety Precautions ......................................................4
Installation of indoor, outdoor unit............................7
Connecting Pipes to the Indoor Unit.......................19
❏ Level gauge
❏ Screw driver
❏ Electric drill
❏ Hole core drill (ø50mm)
❏ Horizontal meter
Connecting Pipes to the Outdoor Unit....................24
Connection of the Cable...........................................25
❏ Flaring tool set
❏ Specified torque wrenches
1.8kg.m, 4.2kg.m, 5.5kg.m, 6.6kg.m
(different depending on model No.)
❏ Spanner .................Half union
Air Purging of the Connecting Pipes and
the Indoor Unit...........................................................27
❏ A glass of water
❏ Screw driver
Checking the Drainage and Forming
the Piping ...................................................................24
Group Control............................................................28
Two Thermistor System ............................................28
E.S.P (External Static Pressure) Setting.................29
How to set E.S.P?......................................................30
Test Running..............................................................32
2 Multi type Air Conditioner
❏ Hexagonal wrench(4mm)
❏ Gas-leak detector
❏ Vacuum pump
❏ Gauge manifold
❏ Owner's manual
❏ Thermometer
❏ Holder Remote Control
Installation Parts Provided
Installation Parts Provided
Standard Type
Indoor Unit
Air filters
Air outlet vents
Air intake vents
Remote Controller
Air intake vents
Air outlet vents
Remote Controller
Outdoor Unit
Air outlet vents
(Rear)
(Side)
Air intake
vents
Control cover
Connecting wire
Piping
Drain hose
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.
■ 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.
■ 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 use a defective or underrated circuit
breaker. Use this appliance on a dedicated
circuit.
• There is risk of fire or electric shock.
Always ground the product.
• There is risk of fire or electric shock.
4 Multi type Air Conditioner
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.
Install the panel and the cover of control box
securely.
• There is risk of fire or electric shock.
Safety Precautions
Always intstall a dedicated circuit and
breaker.
• Improper wiring or installation may cause fire
or electric shock.
Do not modify or extend the power cable.
• There is risk of fire or electric shock.
For installation, always contact the dealer or
an Authorized Service Center.
Use the rated breaker or fuse correctly.
• There is risk of fire or electric shock.
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
condenser and evaporator.
Do not install the product on a defective
installation stand.
• There is risk of fire, electric shock, explosion or • It may cause injury, accident or damage to the
injury.
product.
Be sure the installation area
does not deteriorate with
age.
Do not let the air conditioner
run for a long time when the
humidity is very high and a
door or a window is left open.
• If the base collapses, the air
• Moisture may condense and
conditioner could fall with it,
wet or damage furniture.
causing property damage, product
failure and personal injury.
Do not store or use
flammable gas or
combustibles near the
prodcut.
• There is risk of fire or failure
of product.
Gasolin
Installation Manual 5
Safety Precautions
CAUTION
Always check for gas (refrigerant) leakage
after installation or repair of product.
• Low refrigerant levels may cause failure of
product.
Keep level even when installing the product.
• To avoid vibration or water leakage.
90°
6 Multi type Air Conditioner
Install the drain hose to ensure that water is
drained away properly.
• A bad connection may cause water leakage.
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.
Installation of Indoor, Outdoor Unit
Installation of Indoor, Outdoor Unit
Selection of the best location
1) Indoor unit
• Do not have any heat or steam near the unit.
• Select a place where there are no obstacles in front of the unit.
• Make sure that condensation drainage can be conveniently
routed away.
• Do not install near a doorway.
• Ensure the spaces indicated by arrows from the wall, ceiling,
fence or other obstacles.
• Use a stud finder to locate studs to prevent unnecessary
damage to the wall.
Inspection hole
(600X600)
Control box
Top view
(unit: mm)
600
600
Front
Front view
H
More than
5cm
More than 5cm
More than
5cm
More than 2.3m
2) Outdoor unit
• If an awning is built over the unit to prevent direct sunlight or
rain exposure, be careful that heat radiation from the
condenser is not restricted.
• There should not be any animals or plants which could be
affected by hot air discharged.
• Ensure the spaces indicated by arrows from the wall, ceiling,
fence or other obstacles.
1000
Select location
Install the air conditioner in the location that satisfies the
following conditions.
• The place shall easily bear a load exceeding four times the
indoor unit’s weight.
• The place shall be able to inspect the unit as the figure.
• The place where the unit shall beleveled.
• The place shall allow easy water drainage.(Suitable dimension
“H” is necessary to get a slope to drain as figure.)
• The place shall easily connect with the 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
Fence or
obstacles
More than 120cm
More than
90cm
Fe
ob nce
sta or
cle
s
More than
90cm
More than 90cm
More than 90cm
Installation Manual 7
Installation of Indoor, Outdoor Unit
Piping length and elevation
Distributor Type
Capacity (Btu/h)
60K
(m)
Total Length
With
Distributor
None
Distributor
Max Main Pipe Total Branch
Length (A/B) Pipe Length
Max Branch Max Elevation
In - In
Pipe Length
(h1/h2)
Elevation (h3)
50
A = 25
25
15
20
7.5
30
B = 30
-
-
20
7.5
Distributor
Branch Pipe
A
h3
B
h1
h2
Main Pipe
Distributor Type
CAUTION: Capacity is based on standard length and maximum allowance
length is on the basis of reliability. Oil trap should be installed every 5~7
meters.
NOTICE
When installing 36k Btu/h indoor unit,
use the short tube connector.
(not branch distributor type)
8 Multi type Air Conditioner
Short tube connector
(for A-UNIT)
Installation of Indoor, Outdoor Unit
Piping installation
Case 1
Ø12.7/6.35
12,000 Btu/h Indoor Unit
Distributor
(3 room)
Ø15.88/6.35
Circuit 1
(TPS Cycle)
Ø12.7/6.35
Ø12.7/6.35
12,000 Btu/h Indoor Unit
12,000 Btu/h Indoor Unit
Ø15.88/6.35
Circuit 2
(Single cycle)
24,000 Btu/h Indoor Unit
Case 2
Ø15.88/6.35
Circuit 1
(TPS Cycle)
Distributor
(2 room)
Ø12.7/6.35
18,000 Btu/h Indoor Unit
or 24,000 Btu/h Indoor Unit
Ø15.88/6.35
(at 24,000 Btu/h
Indoor Unit)
Ø12.7/6.35
18,000 Btu/h Indoor Unit
or 12,000 Btu/h Indoor Unit
Ø15.88/6.35
Circuit 2
(Single cycle)
24,000 Btu/h Indoor Unit
Case 3
Ø15.88/6.35
Circuit 1
(TPS Cycle)
36,000 Btu/h Indoor Unit
Ø15.88/6.35
Short tube
Circuit 2
(Single cycle)
24,000 Btu/h Indoor Unit
Installation Manual 9
Installation of Indoor, Outdoor Unit
Indoor unit installation
■ Installation of Unit
Install the unit above the ceiling correctly.
A
B
CASE 1
C
E
POSITION OF SUSPENSION BOLT
D
• Apply a joint-canvas between the unit and
duct to absorb unnecessary vibration.
• Apply a filter Accessory at air return hole.
F
(G)
(Unit:mm)
Dimension
B
C
D
E
18K BTU/h
948 880 355 45.5 450
24K BTU/h
30K BTU/h
1232 1180 315 45.5 450
36K BTU/h
F
(G)
H
I
30
87
750 163
30
87
830 186
H
1-3 mm
A
I
Capacity
Drainage hole
CASE 2
• Install the unit leaning to a drainage hole
side as a figure for easy water drainage.
M10 Nut
X4
(Local
M10 SP. washer X 4 supply)
M10 washer
X4
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
performed.
10 Multi type Air Conditioner
M10 washer
X4
(Local
M10 SP. washer X 4 supply)
M10 Nut
X4
Installation of Indoor, Outdoor Unit
• Select and mark the position for fixing bolts.
• Drill the hole for set anchor on the face of
ceiling.
• Insert the set anchor and washer onto the
suspension bolts for locking the suspension
bolts on the ceiling.
• Mount the suspension bolts to the set
anchor firmly.
• Secure the installation plates onto the
suspension bolts (adjust level roughly)
using nuts, washers and spring washers.
Old building
New building
1 Set anchor
2 Plate washer
3 Spring washer
4 Nut
CAUTION: Tighten the nut and
bolt to prevent unit falling
5 Suspension
bolts
• Local supply
Set anchor
Plate washer
Spring washer
Nut
Suspension bolt
- M10
- M10
- W3/8 or M10
- W3/8 or M10
Installation Manual 11
Installation of Indoor, Outdoor Unit
CAUTION
1. Install declination of the indoor unit is very important for the drain of the duct type air
conditioner.
2. Minimum thickness of the insulation for the connecting pipe shall be 5mm.
Front of view
• The unit must be horizontal or declined to the drain hose connected when finished
installation.
1~3mm
Ceiling
CORRECT
INCORRECT
Drainage hole
CAUTION FOR GRADIENT OF
UNIT AND DRAIN PIPING
• Always lay the drain with downward
inclination (1/50 to 1/100).
Prevent any upward flow or reverse flow
in any part.
• 5mm or thicker formed thermal insulator
shall always be provided for the drain
pipe.
Drainage hole
Lay the drain hose with a downward
inclination so water will drain out.
Thermal insulator
(Local supply)
Drainage pipe
(Local supply)
Unit
Make sure to be closed.
Drainage hole
• Upward routing not
allowed
CORRECT
INCORRECT
Applied U-Trap Dimension
• Install the P-Trap (or U-Trap) to prevent
a water leakage caused by the blocking
of intake air filter.
12 Multi type Air Conditioner
A ≥ 70mm
B ≥ 2C
C ≥ 2 x SP
SP = External Pressure
(mmAq)
Ex) External Pressure
= 10mmAq
A ≥ 70mm
B ≥ 40mm
C ≥ 20mm
B
C
U-Trap
A
Installation of Indoor, Outdoor Unit
• Drill the piping hole with 70mm dia, hole
core drill.
• Piping hole should be slightly slant to the
outdoor side.
Indoor
WALL
Outdoor
5~7mm
INSULATION, OTHERS
THERMAL INSULATION
Insulate the joint and tubes completely.
All thermal insulation must comply with local requirement.
INDOOR UNIT
Union for liquid pipe
Thermal insulator for refrigerant pipe
(Local supply) Thermal insulator for
piping(Local supply)
Refrigerant pipe and thermal
insulator(Local supply)
Hose clip for thermal insulator
(Local supply)
Overlap with thermal
insulator for piping.
Hose clip for thermal insulator(Local supply)
Make sure that there is no clearance here.
Thermal insulator for refrigerant pipe
(Local supply)
Union for gas pipe
REFRIGERANT PIPE
• Insulate and tape the gas piping.
Power cable
Tape
Gas pipe
Liquid pipe
Thermal insulator
TEST AND CHECK
■ After all workings are finished, check the working and operation.
• Air distribution
• Drain
• Gas leakage
• Wiring
• Lock-bolt
Is
Is
Is
Is
Is
the
the
the
the
the
air circulation good?
drainage smooth and no sweating?
piping connection correct?
wiring connection correct?
lock-bolt of compressor loosened?
Installation Manual 13
Installation of Indoor, Outdoor Unit
INSTALLATION OF REMOTE CONTROL BOX
Install the remote control box
and cord correctly.
POINT OF REMOTE CONTROLLER INSTALLATION
• Although the room temperature sensor is in the indoor unit, the remote control box
should be installed in such places away from direct sunlight and high humidity.
INSTALLATION OF THE REMOTE CONTROL BOX
• Select places that is not splashed by
water.
• Select control position after receiving
customer approval.
• The room temperature sensor of the
thermostat for temperature control is
built in the indoor unit.
• This remote controller equipped with
liquid crystal display. If this position is
higher or lower, display is difficult to see.
(The standard height is 1.2~1.5m high)
ROUTING OF THE REMOTE CONTROL CORD
• Keep the remote control cord away from
the refrigerant piping and the drain
piping.
• To protect the remote control cord from
electrical noise, place the cord at least
5cm away from other power cables.
(Audio equipment, Television set, etc)
• If the remote control cord is secured to a
wall, provide a trap at the top of the cord
to prevent water droplets from running.
ELECTRICAL WIRING TO THE INDOOR UNIT
Remote controller
(Main board)
CN REMO
CN REMO
Make sure that wire and terminal
numbers are matched on unit side
and remote controller side.
The maximum length of the cord is 100m.
If the length of the cord exceeds 50m, use a wire size greater than 0.5mm2.
DISASSEMBLING OF THE REMOTE CONTROLLER
Front case
Th
el
ow
er
pa
rt
Lever carefully
the box open
using a screw
driver, etc.
Remote
control
box body
WHEN THE REMOTE CONTROL BOX IS
INSTALLED WITH THE CORD BURIED.
PROCEDURE OF INSTALLATION
1. Fix the under plate on the switch box by
screws(Local supply). In this case, fit the under
plate on the wall, and be careful of deformation.
2. Receive the remote control cord in the switch
box.
3. Hook the remote control unit on the under plate.
Face of wall
Upper notch
Under plate
Remote
control unit
Screw
(Local supply)
Remote
control cord
Lower notch
Switch box
(Local supply)
14 Multi type Air Conditioner
WHEN THE REMOTE CONTROL BOX IS
INSTALLED WITH THE CORD EXPOSED.
PROCEDURE OF INSTALLATION
1. Fix the under plate on the wall by self tapping
screws (accessory).
2. Make a slit (Part A) at the top side of the remote
control box by nipper.
3.Rout the cord as shown in the following figure. In
this case, push the cord into the around of
case(Part B).
4. Hook the remote control unit on the under plate.
Remote
control cord
(Part A)
Face of wall
Upper notch
Under plate
Tapping screw
(Local supply)
Upper flange
Push hand
(Part B)
Remote
control unit
Lower notch
Cord
clamp
FIXING OF REMOTE
CONTROL CORD
1. Fix the cord clamps on the wall
by ø3 tapping screws(Local supply).
2. Fix the remote control cord.
Installation of Indoor, Outdoor Unit
WIRED REMOTE CONTROLLER INSTALLATION
• Since the room temperature sensor is in the remote controller, the remote controller box should
be installed in a place away from direct sunlight, high humidity and direct supply of cold air to
maintain proper space temperature.
Install the remote controller about 5ft(1.5m) above the floor in an area with good air circulation at
an average temperature.
Do not install the remote controller where it can be affected by:
- Drafts, or dead spots behind doors and in corners.
- Hot or cold air from ducts.
- Radiant heat from sun or appliances.
- Concealed pipes and chimneys.
- Uncontrolled areas such as an outside wall behind the remote controller.
- This remote controller is equipped with a seven segment LED. display. For proper display of the
remote controller LED's, the remote controller should be installed properly as shown in Fig.1.
(The standard height is 1.2~1.5 m from floor level.)
AUTO SWING
OPERATION
SET TEMP
Room Temp
Operation unit
03
FAN SPEED
HI
MED
LO
Time
Timer
On Off
Set no. Time 01
ZONE
SUB FUNCTION
AUTO Heater Preheat
JET Defrost Humidify
Filter Out door
1 2 3 4
Program set
05
07
09
11
13
15
17
19
21
23
yes
AUTO SWING
OPERATION
SET TEMP
Room Temp
Operation unit
03
FAN SPEED
HI
MED
LO
Time
Timer
On Off
Set no. Time 01
ZONE
SUB FUNCTION
AUTO Heater Preheat
JET Defrost Humidify
Filter Out door
1 2 3 4
Program set
05
07
09
11
13
15
17
19
21
23
no
TEMP
SET
Temp
Room
ION
FUNCT t
SUB Preheafy
D
Heater Humidi
door
SPEE
AUTO Defrost Out 4
FAN
3
HI JET Filter 2
1
MED
23
LO
21
ZONE
ATION
OPER
G
SWIN
19
17
Time
set
15
13
Program11
AUTO
09
r
Time
Off
Time
Onno.
Set
07
unit
ion 05
Operat 03
01
5feet
(1.5meters)
no
no
Fig.1 Typical locations for remote controller
Installation Manual 15
Installation of Indoor, Outdoor Unit
Perform the work according to the Service
Manual or Installation Guide.
REFRIGERANT PIPING
• Use two spanners when connecting the
refrigerant pipe to the unit.
• Make a bend with a radius as large as
possible.
• Perform air purge with R-22 or vacuum drying.
• When piping work is finished, check all joints.
Indoor
Flared connection (Union)
Use a seemliness tube
Factory charged
■ Add refrigerant if piping over 7.5m(at 30g/m, non
distributor type).
■ Add refrigerant if piping over 3m(main pipe),
4.5m(branch pipe) as shown below, distributor
type.
Pipe
Liquid
Gas
Branch Pipe
Main Pipe
Additional
15.88
6.35
30g/m
12k Btu/h
12.7
6.35
20g/m
18k Btu/h
12.7
6.35
20g/m
24k Btu/h
15.88
6.35
30g/m
INSTALLATION OF OUTDOOR UNIT
Outdoor
Flared connection
(Service valve, Ball valve)
Select a location that satisfies the following
conditions. Install the unit firmly in place.
■ Select the following location
• A place where the air conditioner can get good ventilation.
• A place where it shall not annoy the neighbors.
• A place where the unit shall be leveled and that can support the weight of unit and
withstand its vibrations.
■ Keep a maintenance space
* One side must be 90Cm for service.
Above 90Cm
Above
90Cm
Above
90Cm
*Above 90Cm
16 Multi type Air Conditioner
Installation of Indoor, Outdoor Unit
ELECTRICAL WIRING
Perform the electrical wiring work according to the
electrical wiring connection.
• All wiring must comply with local requirements.
• Select a power source that is capable of
supplying the current required by the air
conditioner.
• Use a recognized circuit breaker between the
power source and the unit. A disconnection
device to adequately disconnect all supply
lines must be fitted.
• Capacity of circuit breaker(at 3 Phase, 25A).
Circuit Breaker
Main
power source
Switch box
Outdoor
Indoor
Control terminal board
Control box
A
A view
WIRING CONNECTION
INDOOR UNIT
• Remove the control box cover for
electrical connection between the
indoor and outdoor unit.
(Remove screws ➀.)
• Use the cord clamper to fix the cord.
1
1
Remote
control cord
Cord clamper
Connection
cord between
the indoor unit
and the
outdoor unit
Control box cover
(On which the Electric
Wiring Connection is put)
OUTDOOR UNIT
• Remove the control cover for wiring
connection.
• Use the cord clamper to fix the cord.
• Earthing work
Connect the cable of diameter 1.6mm2
or more to the earthing terminal
provided in the control box and do
earthing.
Please check !!
Terminal
board
Cover control
Installation Manual 17
Installation of Indoor, Outdoor Unit
How to fix installation plate
The wall you select should be strong and solid
enough to prevent vibration
Installation Plate
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.
(SR, ST)
C
Installation plate
B
D
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.
Type "A" screw
A
Ø70mm
Left rear piping
CHASSIS (Grade)
Ø70mm
Right rear piping
Distance (mm)
SR(12k)
A
0
B
40
C
20
D
40
ST(18k~24k)
105
0
210
0
18 Multi type Air Conditioner
Connecting Pipes to the Indoor Unit
Connecting Pipes to the Indoor Unit
Preparation of Piping
Main cause of gas leakage is defect in
flaring work. Carry out correct flaring work
in the following procedure.
Copper
tube
Slanted Uneven Rough
90°
1) 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 1.5m longer than the pipe
length.
Pipe
Reamer
Point down
2) Burrs removal
■ Completely remove all burrs from the cut
cross section of pipe/tube.
■ Put the end of the copper tube/pipe to
downward direction as you remove burrs
in order to avoid to let burrs drop in the
tubing.
Flare nut
Copper tube
3) Putting nut on
■ Remove flare nuts attached to indoor and
outdoor units, than put them on pipe/tube
having completed burr removal.
(Not possible to put them on after flaring
work)
4) Flaring work
■ Carry out flaring work using flaring tool as
shown below.
Outside Diameter
1/4"
3/8"
1/2"
5/8"
3/4"
"A"
0~0.5
0.5~0.8
0.5~0.8
0.8~1.0
1.0~1.3
Handle
Bar
Bar
"A"
Yoke
Cone
Copper pipe
Clamp handle
Red arrow mark
Smooth all round
Inside is shining without scratches.
Firmly hold copper tube in a bar(or die) as
indicated dimension in the table above.
= Improper flaring =
5) Check
■ Compare the flared work with figure.
■ If flare is noted to be defective, cut off the
flared section and do flaring work again.
Even length
all round
Inclined Surface Cracked Uneven
damaged
thickness
Installation Manual 19
Connecting Pipes to the Indoor Unit
6) Pipe bending
Annealed copper pipe with small diameter (ø6.35 or ø9.52) can be easily bent manually. In this
case, secure large R(radius) for the bend section and gradually bend pipe. If annealed copper
pipe is large in diameter (ø15.88 or ø19.05), bend pipe with bender. Use bender appropriate for
the pipe diameter.
7) Brazing
In refrigerant piping, bending (in particular, acute bending) must be minimized to reduce piping
resistance. Bending is, however, necessary in some places by virtue of the installation position
of devices auxiliary to the packaged air conditioner, or of the building structure, piping distance
or finishing appearance. If a more acute bend is required than that attainable by pipe bender,
perform brazing using ready-made elbow. Aside from this function, brazing also serves to
connect straight pipes, generally using ready-made sockets. While brazing, protect piping
against heat with wet cloth to avoid damaging valve packing or burning thermal insulator with
burner heat. While brazing, blow inert gas (nitrogen gas or carbonic gas) to prevent formation of
oxidation film in copper piping; otherwise, the refrigerant circuit will clog. The blowing of nitrogen
gas (or carbonic gas) through 3-way valves is described in the following:
8) Refrigerant piping(Flare piping)
When connecting piping, be sure to keep piping dry(keep piping away from water), clean (keep
piping away from dust) and airtight (avoid refrigerant leakage).
When connecting piping on rainy days or making a through-hole in wall, take due care to
prevent water or plaster from entering piping.
CAUTION:
a. This procedure is designed to
prevent formation of oxidation film
by filling piping with inert gas. Note
that excessive gas pressure will
generate pinholes at brazed points.
(Nitrogen gas: Supply pressure
0.05~0.1kg/cm2G)
b. When supplying inert gas, be sure
to open one end of piping.
20 Multi type Air Conditioner
Water enters
Plaster enters
Connecting Pipes to the Indoor Unit
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
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.
Loop
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.
Connecting
cable
Drain hose
Gas side
piping
Liquid side
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
Installation Manual 21
Connecting Pipes to the Indoor Unit
Connecting the pipings to the indoor
unit and drain hose to drain pipe
1. Align the center of the pipings and sufficiently
tighten the flare nut by hand.
Indoor unit tubing
Flare nut
Pipings
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
Torque
kg.m
1.8
4.2
5.5
6.6
Spanner (fixed)
Flare nut
Torque wrench
Connection pipe
Indoor unit tubing
3. When extending the drain hose at the indoor
unit, install the drain pipe.
Drain pipe
Indoor unit drain hose
Adhesive
Wrap the insulation material around
the connecting portion.
Vinyl tape(narrow)
Plastic bands Insulation material
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)
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
22 Multi type Air Conditioner
Connecting Pipes to the Indoor Unit
CAUTION: Installation Information (For right piping)
For right piping, follow the instruction below.
Good case
• Press on the upper side of clamp and unfold the tubing to downward slowly.
Bad case
• Following bending type from left to right could cause problem of pipe damage.
Installation Manual 23
Connecting Pipes to the Outdoor Unit
Connecting Pipes to the Outdoor Unit
1) Connecting the pipes to the
Outdoor unit
1. Align the center of the pipings and sufficiently
tighten the flare nut with fingers.
2. Finally, tighten the flare nut with torque
wrench until the wrench clicks.
• When tightening the flare nut with torque
wrench, ensure the direction for tightening
follows the arrow on the wrench.
NOTICE
Pipe size
Torque
1/4"
1.8kg.m
3/8"
4.2kg.m
1/2"
5.5kg.m
5/8"
6.6kg.m
: When installing 36K Btu/h Indoor
Unit, use the short tube connector.
(not branch distributor type)
Outdoor unit
Gas side
piping
Short tube
connector
(for A-UNIT)
Liquid side
piping
Torque wrench
Checking the Drainage and Forming the Piping
1) Checking the Drainage
1. Remove the Air Filter.
2. Check the drainage.
• Spray one or two glasses of water upon
the evaporator.
• Ensure that water flows drain hose of indoor
unit without any leakage.
24 Multi type Air Conditioner
Checking the Drainage and Forming the Piping
2) Form the pipings
1. Wrap the connecting portion of indoor unit
with the Insulation material and secure it
with two Plastic Bands. (for the right
pipings)
• If you want to connect an additional drain
hose, the end of the drain-outlet should
keep distance from the ground. (Do not
dip it into water, and fix it on the wall to
avoid swinging in the wind.)
Seal a small
opening around
the pipings with
gum type sealer.
Taping
Drain hose
Plastic
band
Pipings
Connecting
cable
In case of the Outdoor unit being installed
below position of the Indoor unit.
Power supply
cord
2. Tape the Pipings, drain hose and Connecting
Cable from bottom to top.
3. Form the pipings gathered by taping along
the exterior wall and fix it onto the wall by
saddle or equivalent.
• Trap is required to prevent water from entering
into electrical parts.
In case of the Outdoor Unit being installed
above position of the Indoor Unit.
Seal a small opening
around the pipings
with gum type sealer.
2. Tape the Pipings and Connecting cable from
bottom to top.
Trap
3. Form the pipings gathered by taping along
the exterior wall, and make the trap
prevent water from entering into the room.
4. Fix the pipings onto the wall by saddle or
equivalent.
Trap
Connection of the Cable
WARNING: Make sure that the screws of the terminal are free from
looseness.
1) Clamping of cables
1) Arrange 2 power cables on the control panel.
2) First, fasten the steel clamp with a screw to the inner boss of control panel.
3) For the cooling model, fix the other side of the clamp with a screw strongly.
Installation Manual 25
Checking the Drainage and Forming the Piping
2) Connection of the cable
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. Reflix 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 a adequately disconnect all supply
lines must be fitted.
Power cord
Terminal on the OUTDOOR UNIT
1(L) 2(N)
3
1(L) 2(N)
Terminal
board
R
3
S
T
N
Cover control
5
6
7
Terminal on the INDOOR UNIT
3(L) 4(N)
5
6
7
Terminal on the INDOOR UNIT
A-UNIT
B-UNIT
CAUTION: The power cord connected to the
outdoor unit should be complied with the
following specifications (Rubber insulation,
type H05RN-F approved by HAR or SAA).
The connecting cable connected to the indoor
and outdoor unit should be complied with the
following specifications (Rubber insulation, type
H07RN-F approved by HAR or SAA).
ø8.5mm
OTHER MODELS
NORMAL
CROSS-SECTIONAL
AREA 2.5mm2
GN
/YL
ø7.5mm
3(L) 4(N)
NORMAL
CROSS-SECTIONAL
AREA 0.75mm2
GN
/YL
20
mm
20
mm
CAUTION: After the confirmation of the above conditions, prepare the wiring as follows:
1) Never fail to have an individual power specialized for the air conditioner. As for the method of wiring,
be guided by the circuit diagram pasted on the inside of control box cover.
2) Provide a circuit breaker switch between power source and the unit.
3) The screw which fasten the wiring in the casing of electrical fittings are liable to come loose from
vibrations to which the unit is subjected during the course of transportation. Check them and make
sure that they are all tightly fastened. (If they are loose, it could give rise to burn-out of the wires.)
4) Specification of power source
5) Confirm that electrical capacity is sufficient.
6) Be sure that the starting voltage is maintained at more than 90 percent of the rated voltage marked
on the name plate.
7) Confirm that the cable thickness is as specified in the power sources specification.
(Particularly note the relation between cable length and thickness.)
8) Never fail to equip a leakage breaker where it is wet or moist.
9) The following troubles would be caused by voltage drop-down.
• Vibration of a magnetic switch, damage on the contact point there of, fuse breaking, disturbance to the
normal function of a overload protection device.
• Proper starting power is not given to the compressor.
26 Multi type Air Conditioner
Air Purging of the Connecting Pipes and the Indoor Unit
Air Purging of the Connecting Pipes and the Indoor Unit
The air which contains moisture remaining in the refrigeration cycle may cause a malfunction on
the compressor.
1. Confirm that both the liquid side valve and the gas side valve are set to the closed position.
2. After connecting the piping, check the joints for gas leakage with gas leak detector.
3. Remove the service port nut, and connect the gauge manifold and the vacuum pump to the
service port by the charge hose.
4. Vacuum the indoor unit and the connecting pipes until the pressure in them lowers to below 76cmHg.
5. Remove the valve stem nuts, and fully open the stems of the 2-way and 3-way valves with a
hexagon wrench.
6. Tighten the valve stem nuts of the 2-way valve and 3-way valve.
7. Disconnect the charge hose and fit the nut to the service port.
(Tightening torque: 1.8kg.m)
Indoor unit
Liquid side
Closed
Outdoor unit
2-way valve/
3-way valve
Gas side
3-way
valve
Closed
Vaccum pump
OPEN
CLOSE
Installation Manual 27
Group Control
Group Control
It operates maximum 16 Units by only one Wired Remote Controller,
and each Unit starts sequentially to prevent overcurrent.
Main PCB
RED(12V)
YL(SIGNAL)
BR(GND)
Indoor Unit 1
Indoor Unit 2
Terminal(Local Supply)
Block
Connector
Terminal(Local Supply)
Block
Connector
RED(12V)
YL(SIGNAL)
BR(GND)
Main PCB
#1
YL(SIGNAL)
BR(GND)
YL(SIGNAL)
BR(GND)
Indoor Unit 16
Terminal(Local Supply)
Block
Connector
Main PCB
#2
....
YL(SIGNAL)
BR(GND)
....
AUTO SWING
OPERATION
SET TEMP
Room Temp
Operation unit
03
FAN SPEED
HI
MED
LO
Time
Timer
On Off
Set no. Time 01
ZONE
YL(SIGNAL)
BR(GND)
Main PCB
#16
Connecting Cable(Local Supply)
SUB FUNCTION
AUTO Heater Preheat
JET Defrost Humidify
Filter Out door
1 2 3 4
Program set
05
07
09
11
13
15
17
19
21
23
Wired Remote Controller
(Standard)
Single
Group
Slide Switch2
Remote
Controller
PCB
Two Thermistor system
• Open the rear cover of Remote
Controller to set up the mode.
Slide Switch1
Slide Switch2
Room Temp. Sensing
Remo.
Indoor Unit
2 TH(Remo.+Indoor)
Single
Group
CAUTION
• On installing, don't impact to the PCB
and LCD display.
• Don't remove the protection sheet.
• Use the specified screw.
• On installing, turn off the main power.
28 Multi type Air Conditioner
• Selectable options are three as follows.
- Remo: Sensing the room Temperature.
- Indoor Unit: Sensing the intake air into
indoor Unit.
- 2 TH: Sensing the lower temperature of
the two thermistors.
• To set up the mode, adjust the slide
switch to desired mode position on
installing.
E.S.P.(External Static Pressure) Setting
E.S.P.(External Static Pressure) Setting
(1) Open the rear cover of the wired remote-controller to set the mode.
(2) Select one of three selectable modes as follows.
■ Without Zone System
1. Position V-H, F-H:
• This position sets the maximum E.S.P as a default set.
2. Position V-L:
• This position sets the minimum E.S.P as a default set.
■ With Zone System
1. Position V-H:
• Maximum E.S.P setting & Fan speed is varied according to the state of dampers by micom.
2. Position F-H:
• Maximum E.S.P setting & Fan speed doesn't vary according to the opening & Closing of dampers.
3. Position V-L:
• Minimum E.S.P setting & Fan speed is varied according to the state of dampers by micom.
*Maximum: 18K/24K-8mmAq
Minimum: All-0mmAq
(3) Move the slide switch to set position.
TH
R14H OP3
SW TH
V-L
R13H
OP2
REMO
MAIN
2TH
CO1H
OP1
R19H
R11H
OP5R16H
OP4
R15H
OP7
R18H
R17H
F-H
OP6
LO
STAND
C070
V-H
R12H
R03S
HI
R04S
HIGH
R01S
R02S
SW
Slide switch for ceiling height
(4) Close the rear cover and check if it works normally.
CAUTION:
• Select the position after checking duct work and E.S.P of the unit.
• Maunfactured in the position F-H.
Installation Manual 29
How to Set E.S.P?
How to Set E.S.P?
Procedure of RPM change:
Ex) External Static pressure is 4mmAq for Model Name "L2NC246BRA0"
• To protect the unit, compressor is designed to be off during E.S.P. setting.
1
Push the "On/Off" button.
The unit will start.
AUTO SWING
OPERATION
SET TEMP
FAN SPEED
Room Temp
AUTO Heater Preheat
JET Defrost Humidify
Filter Out door
ZONE
1 2 3 4
Time
Timer
Operation unit
On Off
Set no. Time 01
2
03
Program set
05
07
09
11
13
15
AUTO SWING
OPERATION
SET TEMP
Room Temp
19
21
FAN SPEED
23
Operation unit
03
SUB FUNCTION
HI
MED
LO
AUTO Heater Preheat
JET Defrost Humidify
Filter Out door
ZONE
1 2 3 4
Time
Timer
On Off
Set no. Time 01
Program set
05
07
09
11
13
15
17
19
21
23
Push the "Up" of "Down" button for E.S.P adjustment.
And, adjust the number which you want.(In this example, the number is "190". Refer to the
table 1 on the next page.)
AUTO SWING
OPERATION
SET TEMP
Room Temp
FAN SPEED
Operation unit
03
SUB FUNCTION
HI
MED
LO
AUTO Heater Preheat
JET Defrost Humidify
Filter Out door
ZONE
1 2 3 4
Time
Timer
On Off
Set no. Time 01
NOTICE
17
Push the "Timer" and "Wind" button simultaneously for more than 3 seconds.
Timer
3
SUB FUNCTION
HI
MED
LO
Program set
05
07
09
11
13
15
17
19
21
23
: The range of selection is from 1~254. Since, the display is two Digit only.
If the range selection is above 100 then the third digit will appear in the screen as shown.
4
Shift the fan speed mode by pressing the fan speed button.
And then, Adjust numbers of next steps by repeating the stage 3.
(In this example, the numbers are "220" and "235" respectly)
5
Push the "Timer" and "Wind" button simultaneously for more than 3 seconds.
Then, Wind Data is memorized by the EEPROM of the main PCB.
AUTO SWING
OPERATION
SET TEMP
Room Temp
AUTO Heater Preheat
JET Defrost Humidify
Filter Out door
ZONE
1 2 3 4
Time
Timer
Operation unit
30 Multi type Air Conditioner
03
SUB FUNCTION
HI
MED
LO
Timer
On Off
Set no. Time 01
FAN SPEED
Program set
05
07
09
11
13
15
17
19
21
23
How to Set E.S.P?
[Table. 1]
Static Pressure(mmAq)
Capacity
18K Btu/h
24K Btu/h
30K Btu/h
36K Btu/h
0
2
4
16.5 CMM
235
230
225
215
180
14.5 CMM
245
238
235
230
215
13 CMM
254
252
248
245
240
18 CMM
220
205
190
50
1
16.5 CMM
235
230
220
200
100
Step(Hi/Med/Lo)
6
8
10
Setting Value
14 CMM
250
240
235
230
210
26.5 CMM
153
150
150
148
130
1
23 CMM
173
173
175
175
170
155
20 CMM
190
190
190
190
190
190
32 CMM
230
230
225
220
150
1
29 CMM
240
238
237
235
230
220
26.5 CMM
245
245
243
243
240
240
Note: 1. Be sure to set the value refering table 1. Unexpected set value will cause
mal-function.
2. Table 1 is based at 230V. According to the fluctuation of voltage, air flow rate
varies.
Installation Manual 31
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.
NOTICE :
• 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.
Evaluation of the performance
Operate unit for 15~20 minutes, then check the
system refrigerant charge:
1. Measure the pressure of the gas side service valve.
2. Measure the temperature of the intake and
discharge of air.
3. Ensure the difference between the intake
temperature and the discharge is more than 8°C
4. For reference, the gas side pressure of optimum
condition is as below.(Cooling)
Outside ambient
Refrigerant
TEMP.
R-22
35°C (95°F)
The pressure of the gas side
service valve.
4~5kg/cm2G(56.8~71.0 P.S.I.G.)
NOTICE If the actual pressure are higher than shown, the
system is most likely over-charged, 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.
32 Multi type Air Conditioner
Intake temperature
Discharge air
Discharge
temperature
Test Running
PUMP DOWN
This is performed when the unit is to be
relocated or the refrigerant circuit is
serviced.
Pump Down means collecting all refrigerant in
the outdoor unit without loss in refrigerant gas.
CAUTION: Be sure to perform
Pump Down procedure with the
unit cooling mode.
Pump Down Procedure
1. Connect a low-pressure gauge manifold hose
to the charge port on the gas side service
valve.
2. Open the gas side service valve halfway and
purge the air from the manifold hose using the
refrigerant gas.
3. Close the liquid side service valve(all the way
in).
4. Turn on the unit's operating switch and start the
cooling operation.
5. When the low-pressure gauge reading
becomes 1 to 0.5kg/cm2 G(14.2 to 7.1 P.S.I.G.),
fully close the gas side valve stem and then
quickly turn off the unit. At that time, Pump
Down has been completed and all refrigerant
gas will have been collected in the outdoor unit.
Installation Manual 33
Memo
34 Multi type Air Conditioner
P/No.: 3828A20433B