LG | LSN5MR3T1 | LG LSN5MR3T1 Owner’s Manual

INSTALLATION MANUAL
AIR CONDITIONER
Please read this installation manual completely before installing the product.
When the power cord is damaged, replacement work shall be
performed by authorized personnel on;y.
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 : WALL MOUNTED
LG Electronics India Pvt. Ltd.
P/No. MFL39754838
Registered Office : A-27, Mohan Co-operative
Industrial Estate, Mathura Road, New Delhi-110044
Tel: 011-26991412, Fax: 011-26991410
www.lg.com
(Recommended 24°C is suitable for human body)
(Refer page no. 21 and 22 owner's manual)
TABLE OF CONTENTS
6
INSTALLATION PARTS
6 Installation Parts provided with the Unit
6 Installation Parts you must purchase
7 Required Tools
8
INSTALLATION
8 Installation of Indoor & Outdoor Unit
10 Flaring Work and Connection of Piping
11 Connection of piping (Indoor)
11 For right rear piping
12 For left rear piping
14 Connection of piping (Outdoor)
15 Connecting the cable between indoor
unit and outdoor unit
17 Checking the drainage and forming the
piping
18 Air purging
20 Test running
5
6
INSTALLATION PARTS
INSTALLATION PARTS
Installation parts provided with the unit
Type ‘A’ Screw
Quantity
Type ‘A’ Screw
4
Installation Plate
1
Type ‘B’ Screw
2
Holder Remote Control
1
Shape
Others
• Paper pattern for
installation.
• Owner’s Manual
• Installation Manual
Installation parts you must purchase
Type ‘A’ Screw
Quantity
Shape
Others
Sleeve
Bushing Sleave
Putty (Gum type sealer)
Installation parts you
must purchase
More than
20cm
Installation plate
Sleeve
Bushing-Sleeve
Putty(Gum Type Sealer)
More than
5cm
Bend the pipe as closely
on the wall as possible,
but be careful that it
doesn't break.
(Left and right
are identical)
Vinyl tape (Wide)
Air filter
Vinyl tape (Wide)
Gas side piping
Saddle
Liquid side piping
Apply after carrying out a
drainahe test.
To carry out the drainage
test, remove the air filters
and pour water into the heat
exchanger.
More than
60cm
Additional drain pipe
Vinyl tape (Narrow)
Saddle
More than
10cm
More than 70cm
More than
10cm
Gas side piping
Liquid side piping
Additional drain pipe
Vinyl tape (Narrow)
Connecting cable: Cooling & Heat pump: 2EA
Cooling only: 1EA
• Paper pattern
for installation.
• Owner’s
Manual
• Installation
Manual
INSTALLATION TOOLS
Installation Tools
S.No.
Required Tools
1
Level Gauge
2
Screw Driver
3
Electric Drill
4
Hole Core Drill (Dia-70mm)
5
Flaring Tool Set
6
Specified torque wrenches 1.8kg.m, 4.2kg.m, 5.5kg.m, 6.6kg.m
(Different depending on model no.)
7
Spanner (Half Union)
8
A glass of water
9
Hexagonal Wrench
10
Gas-Leak Detector
11
Vacuum Pump
12
Gauge Manifold
13
Owner’s Manual
14
Thermometer
7
8
INSTALLATION
INSTALLATION OF INDOOR & OUTDOOR UNIT
Read completely, then follow step by step.
Select the best location
Rooftop Installation
A 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 that the space around the left and
right of the unit is more than 5cm. The
unit should be installed as high on the
wall as possible, allowing a minimum of
5cm from ceiling.
Use a stud finder to locate studs to
prevent unnecessary damage to the wall.
More than 5cm
More than 5cm
If the outdoor unit is installed on a roof structure, be
sure to level the unit. Ensure the roof structure and
anchoring method are adequate for the unit location.
Consult local codes regarding rooftop mounting.
Piping length and elevation
Capacity
(Btu/h)
9K
Max.
length
A (m)
Additional
Refrigerant
(g/m)
3 to 5
20
20
3 to 5
20
20
3 to 5
20
20
3 to 5
20
20
Standard
Length
GAS LIQUID
(m)
Pipe Size
3/8"
1/4"
9K, 12K,
1/2" 1/4"
18K (50Hz)
18K (60Hz)
5/8" 1/4"
24K Cooling
24K, 26K
Cooling & Heat Pump 5/8" 3/8"
Outdoor unit
More than 2.3m
More than 5cm
CAUTION
A
Install the indoor unit on the wall where the height
from the floors more than 2.3 meters.
Indoor unit
B Outdoor Unit
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 space around the back
and sides is more than 10cm. The front of
the unit should have more than 70cm of
space.
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.
Outdoor unit
Oil trap
Indoor unit
B
More than 60cm
More than 10cm
A
In case more than 5m
More than 10cm
CAUTION
More than 70cm
More
than 60cm
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.
INSTALLATION
9
INSTALLATION OF INDOOR & OUTDOOR UNIT
How to fix installation plate
Drill a hole in the wall
The wall you select should be strong and solid
enough to prevent vibration.
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.
A Mount the installation plate on the wall with
four type A screws. If mounting the unit on a
concrete wall, use anchor bolts.
WALL
Indoor
Outdoor
Type "A" screw
5-7mm
Installation Plate
(0.2~0.3")
Mount the installation plate horizontally by
aligning the centerline using a level.
CAUTION
Make sure that the drilled hole in the wall is
properly sealed (using a proper sealant, for
example cement, plaster of paris etc.) after
passing the installation pipe, drainage pipe
and the inter connecting cable.
Marking-off line
Thread
Weight
Usage of Drain Pan
(Heat Pump)
Measure the wall and mark the centerline. It
B 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.
Drain pan along with drain pipe (as
shown below) can be used to drain
the water accumulated in the outdoor
during the Heat Mode.
Outdoor Unit
Left rear piping
"D"
Hole center
Right rear piping
"C"
ø70mm
Drain Pan
Drain Pipe
10 INSTALLATION
FLARING WORK AND CONNECTION OF PIPING
Flaring work
D Flaring work
Main cause for gas leakage is due to defect
in flaring work. Carry out correct flaring work
in the following procedure.
Carry out flaring work using flaring tool as shown
below.
Outside diameter
A Cut the pipes and the cable
Use the piping kit accessory 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.
90°
inch
mm
ø6.35
1/4
0~0.5
ø9.52
3/8
0~0.5
ø12.7
1/2
0~0.5
ø15.88
5/8
0~1.0
Firmly hold copper pipe in a die in the
dimension shown in the table above.
"A"
Handle
Bar
Copper
pipe
A
mm
Bar
Yoke
Slanted Uneven Rough
Cone
Copper pipe
Clamp handle
B Burrs removal
E
Completely remove all burrs from the cut
cross section of pipe/tube.
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.
Red arrow mark
Check
Compare the flared work with figure below.
If flare is noted to be defective, cut off the flared
section and do flaring work again.
Smooth all round
Pipe
Inside is shiny without scratches.
Reamer
= Improper flaring =
Point down
Inclined
C Putting nut on
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)
Flare nut
Copper tube
Even length
all round
Surface Cracked Uneven
damaged
thickness
INSTALLATION
11
FLARING WORK AND CONNECTION OF PIPING
Connection of pipingIndoor
C Tape the tubing, drain hose and the connecting
Preparing the indoor unit's piping and drain
hose for installation through the wall.
Remove the plastic tubing retainer (see
illustration below) and pull the tubing and
drain hose away from chassis.
Replace the plastic tubing holder in the
original position.
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
Tubing holder
To remove the holder,
press the bottom of
chassis near the holder
upward and pull the tab
out of its hole.
CAUTION
When install, make sure
that the remaining parts
must be removed clearly
so as not to damage the
piping and drain hose,
especially power cord
and connecting cable.
Connecting
cable
Gas side
piping
Drain hose
Liquid side
piping
NOTE: 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.
D Indoor unit installation
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
For left rear piping
Connecting
cable
A Route the indoor tubing and the drain hose
in the direction of rear left.
Drain hose
Press the lower left and right sides of the
unit against the installation plate until the
hooks engage into their slots (clicking-sound).
Connecting the pipings to the indoor unit and
E drain hose to drain pipe.
Drain hose
B Insert the connecting cable into the indoor
unit from the outdoor unit through the
piping hole.
Do not connect the cable to the indoor unit.
Make a small loop with the cable for easy
connection later.
Align the center of the pipings and sufficiently
tighten the flare nut by hand.
Indoor unit tubing
Flare nut
Pipings
12 INSTALLATION
FLARING WORK AND CONNECTION OF PIPING
Wrap the area which accommodates the rear
piping housing section with vinyl tape.
Tighten the flare nut with a wrench.
Spanner (fixed)
Vinyl tape
(wide)
Flare nut
Indoor
unit pipe
Connection
pipe
Wrap with vinyl tape
Connection pipe
Torque wrench
Connecting cable
Indoor unit tubing
Pipe
Vinyl tape(narrow)
Pipe Size[Torque]
Capacity
(Btu/h)
9K, 12K
18K, 24K, 26K
GAS
LIQUID
1/2"[5.5kg.m]
1/4"[1.8kg.m]
5/8"[6.6kg.m]
3/8"[4.2kg.m]
When extending the drain hose at the indoor unit,
install the drain pipe.
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
Drain pipe
Vinyl tape(wide)
Drain hose
Indoor unit drain hose
Adhesive
Vinyl tape(narrow)
Wrap the insulation material around the
F connecting
portion.
For right rear piping
A Route the indoor tubing and the drain hose to
the required piping hole position.
Overlap the connection pipe insulation material and
the indoor unit pipe insulation material. Bind them
together with vinyl tape so that thee is no gap.
Plastic bands
Insulation material
Insert the piping, drain hose and the connecting
B cable
into the piping hole.
Connecting cable
Drain pipe
INSTALLATION 13
FLARING WORK AND CONNECTION OF PIPING
C Insert the connecting cable into the indoor unit.
Don't connect the cable to the indoor unit.
Make a small loop with the cable for easy
connection later.
Pipe Size[Torque]
Capacity
(Btu/h)
9K, 12K
18K, 24K, 26K
GAS
LIQUID
1/2"[5.5kg.m]
1/4"[1.8kg.m]
3/8"[4.2kg.m]
5/8"[6.6kg.m]
D Tape the drain hose and the connecting cable.
When extending the drain hose at the indoor unit.
install the drain pipe.
Connecting cable
Drain pipe
Indoor unit drain hose
Adhesive
E Indoor unit installation
Hang the indoor unit from the hooks at the top of
the installation plate.
Insert the spacer etc. between the indoor unit and
the installation plate and separate the bottom of
the indoor unit from the wall.
Vinyl tape(narrow)
Wrap the insulation material around the
G connecting
portion.
Overlap the connection pipe heat insulation and the
indoor unit pipe heat insulation material. Bind them
together with vinyl tape so that there is no gap.
Plastic bands
Insulation material
Indoor unit
Spacer
Installation plate
8cm
F Connecting the pipings to the indoor unit and
the drain hose to drain pipe.
Align the center of the pipings and sufficiently
tighten the flare nut by hand.
Wrap the area which accommodates the rear
piping housing section with vinyl tape.
Vinyl tape
(wide)
Indoor unit tubing
Flare nut
Pipings
Vinyl tape(narrow)
Connecting cable
Spanner (fixed)
Torque wrench
Indoor unit tubing
Connection pipe
Wrap with vinyl tape
Pipe
Tighten the flare nut with a wrench.
Flare nut
Indoor
unit pipe
Connection
pipe
14 INSTALLATION
FLARING WORK AND CONNECTION OF PIPING
Bundle the piping and drain hose together by
wrapping them with cloth tape over the range
within which they fit into the rear piping housing
section.
Pipe
Connection of the
pipes-Outdoor
Align the center of the pipings and
Drain hose
Vinyl tape(narrow)
A sufficiently tighten the flare nut by hand.
Wrap with
vinyl tape(wide)
H Reroute the pipings and the drain hose across
the back of the chassis.
Piping for
passage through
piping hole
I Set the pipings and the drain hose to the back of
the chassis with the tubing holder.
Hook the edge of tubing holder to tap on chassis
and push the bottom of tubing holder to be
engaged at the bottom of chassis.
B 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.
Pipe Size[Torque]
Capacity
(Btu/h)
GAS
LIQUID
9K, 12K
18K, 24K, 26K
1/2"[5.5kg.m]
5/8"[6.6kg.m]
1/4"[1.8kg.m]
3/8"[4.2kg.m]
Tubing holder
1 Hook
Outdoor unit
Gas side piping
(Bigger diameter)
2 Push
J Indoor unit installation
Remove the spacer.
Ensure that the hooks are properly seated on the
installation plate by moving it left and right.
Liquid side
piping
(Smaller
diameter)
Connecting
cable
Drain hose
Press the lower left and right sides of the unit against
the installation plate until the hooks engage into their
slots(clicking sound).
Torque wrench
INSTALLATION 15
CONNECTING THE CABLE
BETWEEN INDOOR & OUTDOOR UNIT
Connect the cable from
Indoor to outdoor unit.
CAUTION
The power cord connected to the indoor unit should
be compiled with the following specifications
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.
(Type H05VV-F approved by HAR or SAA).
Capacity
(Btu/h)
(Ensure that the color of the wires of the
outdoor unit and the terminal No. are the same
as those of the indoor unit.)
Cooling model (2.0 Ton)
ODU Terminal
RED
1(L)
BLACK
G/Y
Connector of
Indoor Unit
Lock the
connectors
properly
Connector of
Inter-connecting
cable
BLACK GREEN YELLOW
2(N)
Color of Wires BLACK
Color of Wires
ODU Terminal
RED
1(L)
RED
To be screwed
on the channel
plate of
evaporator coil.
G/Y
Lock the
connectors
properly
Color of Wires
BLACK GREEN YELLOW
Color of Wires
RED
2(N)
ODU Terminal
1(L)
18K
1.5mm2
24K
26K
2.5mm2
Connector of
Inter-connecting
cable
(Type H07RN-F approved by HAR or SAA).
Capacity
(Btu/h)
BLACK GREEN YELLOW
2(N)
Screw the
Wire on
Control Panel
1.0mm2
Connector of
Indoor Unit
RED
RED
BLACK GREEN YELLOW
9K, 12K
The power connecting cable connected to the
indoor and outdoor unit should be compiled with the
following specifications
2(N)
BLACK
RED
BLACK
G/Y
Color of Wires
1(L)
RED
IDU Terminal
Color of Wires
Cooling model (1.5 Ton)
Cooling model (0.75, 0.9, 1.0 Ton)
NORMAL CROSS
-SECTIONAL AREA
Screw the
Wire on
Control Panel
NORMAL CROSS
-SECTIONAL AREA
9K, 12K
1.0mm2
18K, 24K
26K
2.5 mm2
The connecting cable connected to the indoor and
outdoor unit should be compiled with the following
specifications
Heat pump model
Terminals on the indoor unit
(Type H07RN-F approved by HAR or SAA).
1(L) 2(N)
3
4
Color of Wires
RED
BLACK
G/Y
BLUE BROWN
Color of Wires
RED
BLACK
G/Y
BLUE BROWN
1
2
3
4
Terminals on the outdoor unit
5
NORMAL
CROSS-SECTIONAL
AREA 0.75mm 2
6
The length of the power supply cord should be
over 1.8m measured from the power supply cord
entry of the cabinet to the middle of the live pin
of the plug.
CAUTION
If a power plug is not to be used, provide a circuit breaker between power source and the unit as shown below.
Main power source
Air
Conditioner
Circuit Breaker
Use a circuit
breaker or time
delay fuse.
16 INSTALLATION
CONNECTING THE CABLE
BETWEEN INDOOR & OUTDOOR UNIT
Connect the cable to the
outdoor unit
Outdoor Unit
Terminal block
A Remove the control cover from the unit by
loosening the screw.
Connect the wires to the terminals on the
control board individually.
Over 5mm
B Secure the cable onto the control board with
Connecting cable
C Refix the control cover to the original
Connecting cable
the cord clamp.
position with the screw.
Cover
control
Cover Control
D Use a recognized circuit breaker 20A (18K),
25A (24K, 26K) between the power source
and the unit. A disconnecting device to
adequately disconnect all supply lines must
be fitted.
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) 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 cause burn-out of the wires.)
3) Specification of power source.
4) Confirm that electrical capability 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. (Refer to page 11))
7) Always 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 17
CONNECTING THE CABLE
BETWEEN INDOOR & OUTDOOR UNIT
Form the piping
Checking the drainage
To remove the front panel from the indoor
A Form the piping by wrapping the
A unit, remove the front panel from the
connecting portion of the indoor unit with
insulation material and secure it with two
kinds of vinyl tapes.
indoor unit cabinet.
Set the air direction louvers up-and-down to
the position(horizontally) by hand.
Remove the securing screws that retain the
front panel. Pull the lower left and right
sides of the grille toward you and lift it off.
(18K, 24K, 26K Btu models: 3EA)
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.
B In cases where the outdoor unit is
installed below the indoor unit perform
the following.
Tape the piping, drain hose and
connecting cable from down to up.
Secure the tapped piping along the exterior
wall using saddle or equivalent.
Pull the right and
the left side.
Screw
Seal small openings
around pipings with a
gum type sealer.
B To check the drainage.
Pour a glass of water on the evaporator.
Ensure the water flows through the drain
hose of the indoor unit without any leakage
and goes out the drain exit.
Taping
Drain
hose
Pipings
Connecting
cable
Trap is required to prevent water
from entering into electrical parts.
In cases where the Outdoor unit is
C installed
above the Indoor unit perform
the following.
C Drain piping
Tape the piping, and connecting cable from
down to up.
Secure the taped piping along the exterior
wall. Form a trap to prevent water entering
the room.
Fix the piping onto the wall by saddle or
equivalent.
The drain hose should point downward for
easy drain flow.
Downward slope
Seal a small opening
around the pipings
with gum type sealer.
Do not make drain piping.
Trap
Do not raise
Water
leakage
Water
leakage
Accumulated
drain water
Air
Waving
Tip of drain hose
dipped in water
Water
leakage
Less than
50mm gap
Ditch
Trap
18 INSTALLATION
AIR PURGING
Air purging
Air and moisture remaining in the refrigerant
system have undesirable effects as indicated
below.
Pressure in the system rises.
Operating current rises.
Cooling(or heating) efficiency drops.
Moisture in the refrigerant circuit may
freeze and block capillary tubing.
Water may lead to corrosion of parts in the
refrigeration system.
Therefore, the indoor unit and tubing between
the indoor and outdoor unit must be leak tested
and evacuated to remove any noncondensables
and moisture from the system.
Do a leak 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.
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.
Indoor unit
Air purging with vacuum
pump
A 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. Note that both the
liquid and the gas side service valves on
the outdoor unit are kept closed at this
stage.
B Leak test
Connect the manifold valve(with pressure
gauges) and dry nitrogen gas cylinder to
this service port with charge hoses.
Outdoor unit
Manifold valve
Pressure
gauge
Lo
Hi
CAUTION
Be sure to use a manifold valve for air
purging. 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, thetop of the cylinder must be higher than its
bottom when you pressurize thesystem. Usually, the
cylinder is used in a vertical standing position.
Charge hose
Nitrogen gas
cylinder(in vertical
standing position)
INSTALLATION 19
AIR PURGING
Soap water method
(1) Remove the caps from the 2-way and 3-way
valves.
(2) Remove the service-port cap from the 3-way
valves.
(3) To open the 2-way valve turn the valve stem
counterclockwise approximately 90°, wait for
about 2~3 sec, and close it.
(4) Apply a soap water or a liquid neutral detergent
on the indoor unit connection or outdoor unit
connections by a soft brush to check for
leakage of the connecting points of the piping.
(5) If bubbles come out, the pipes have leakage.
Gas side
Liquid side
3-way valve
(Close)
2-way valve
(Open)
Cap
Hexagonal wrench
C Evacuation
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 less If tubing length is longer
than 10m (33 ft)
than 10m (33 ft)
10 min. or more
15 min. or more
Outdoor unit
When the desired vacuum is reached, close the
"Lo" knob of the manifold valve and stop the
vacuum pump.
D Finishing the job
With a service valve wrench, turn the valve stem
of liquid side valve counter-clockwise to fully
open the valve.
Turn the valve stem of gas side valve
counter-clockwise to fully open the valve.
Loosen the charge hose connected to the gas side
service port slightly to release the pressure, then
remove the hose.
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.
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
Pressure
gauge
Lo
Hi
Open
Vacuum pump
Close
20 INSTALLATION
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.
3. Ensure the difference between the intake
temperature and the discharge is more than 8°C
(Cooling) or reversely (Heating).
Intake temperature
A Prepare remote control
1. Remove the battery cover
by pulling it according to the
arrow direction.
Discharge air
2. Insert new batteries making
sure that the (+) and (–) of
battery are installed correctly.
3. Reattach the cover by
pushing it back into position.
NOTE:
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.
B Settlement of outdoor unit
Anchor the outdoor unit with a bolt and nut ø10mm)
tightly and horizontally on a concrete or rigid mount.
When installing on the wall, roof or rooftop, anchor
the mounting base securely with a nail or wire
assuming the influence of wind and earthquake.
In the case when the vibration of the unit is
conveyed to the hose, secure the unit with an
anti-vibration rubber.
Discharge
temperature
4. For reference; the gas side pressure of optimum
condition is as below.(Cooling)
Outside ambient TEMP. The pressure of the gas side service valve
35°C(95°F)
4~5kg/cm2 G(56.8~71.0 P.S.I.G.)
NOTE: If the actual pressure are higher than shown, the
system is most likely over-charged, and charge
should be removed. If the actual pressureare
lower than shown, the system is most likely
undercharged, and charge should be added
The air conditioner is now ready for use.
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:
Bolt
Be sure to perform Pump Down procedure with the
unit cooling mode.
C Evaluation of the performance
1. Connect a low-pressure gauge mainifold 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/cm2G(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.
Pump Down Procedure
Tubing connection
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.
LSN-27
LSN-34
LSN-26
LSN-24
LSN-23
LSN-20
LSN-25
LSN-22
LSN-33
LSN-19
LSN-17
LSN-18
LSN-21
LSN-16
LSN-15
LSN-04
LSN-07
LSN-12
LSN-06
LSN-14
LSN-02
LSN-05
LSN-31
LSN-32
LSN-03
LSN-11
LSN-30
LSN-38
LSN-10
LSN-08
Copyright ©2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LSN-01
LSN-13
LGE Internal Use Only
Download PDF