Aire SK Series User manual

INSTALLATION INSTRUCTIONS
SINGLE SPLIT WALL MOUNTED AIR CONDITIONER
More than
10cm
More than 70cm
More than
60cm More than
10cm
Gas side piping
Liquid side piping
Additional drain pipe
Vinyl tape (Narrow)
Connecting cable: Cooling & Heat pump: 2EA
Cooling only: 1EA
,,,
,,,
,,,







yyy
yyy
yyy
zzz
zzz
zzz
{{{
{{{
|||
|||
1. Type "A" screw
2. Installation Plate
3. Type "B" screw
4. Holder Remote Control
Air filter
(Left and right
are identical)
Installation plate
Sleeve
Bushing-Sleeve
Putty(Gum Type Sealer)
Bend the pipe as closely
on the wall as possible,
but be careful that it
doesn't break.
Installation parts you
must purchase
Vinyl tape (Wide)
• Apply after carrying out a
drainage test.
• To carry out the drainage
test, remove the air filters
and pour water into the heat
exchanger.
Saddle
More than
5cm
More than
5cm
P/No. : 3828AR7314S
(SK-Series)
• Please read this instruction sheet 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.
Installation Parts Provided
• This illustration is for explanation purposes only.
The indoor unit will actually face a different way.
ENGLISH ITALIANO ESPAÑOL FRANÇAIS DEUTSCH

INSTALLATION OVERVIEW
2
The following should be always
observed for safety....................3
Installation of indoor, outdoor
unit................................................4
Flaring work and connection of
piping...........................................6
Connection of piping(Indoor)...... 7
For right rear piping
For left rear piping
Connection of piping(Outdoor)
................................................10
Connecting the cable between
indoor unit and outdoor unit......
....................................................11
Checking the drainage and
Forming the piping..................13
Air purging ...............................14
Test running .............................16
❏Installation plate
❏Four type "A" screws
❏Connecting cable
❏Pipes: Gas side ...........1/2", 5/8"
Liquid side ........1/4", 3/8"
(Refer to page 4)
❏Insulation materials
❏Additional drain pipe
(Outer Diameter...........15.5mm)
❏Two type "B" screws
❏Level gauge
❏Screw driver
❏Electric drill
❏Hole core drill(ø70mm)
❏Flaring tool set
❏Specified torque wrenches
1.8kg.m, 4.2kg.m, 5.5kg.m, 6.6kg.m
(different depending on model No.)
(Refer to page 10)
❏Spanner......................Half union
❏A glass of water
❏Screw driver
❏Hexagonal wrench(4mm)
❏Gas-leak detector
❏Vacuum pump
❏Gauge manifold
❏Owner's manual
❏Thermometer
❏Holder Remote Control
Installation
Requirements Required Parts Required Tools

ENGLISH
THE FOLLOWING SHOULD BE ALWAYS OBSERVED FOR SAFETY
3
■
Be sure to read "THE FOLLOWING SHOULD BE ALWAYS OBSERVED FOR SAFETY" before installing the air
conditioner.
■ Be sure to observe the cautions specified here as they include important items related to safety.
■ The indications and meanings are as follows.
■ After reading this instructions, be sure to keep it together with the owner's manual in a handy place on the
customer's site.
WARNING : Could lead to death, serious injury, etc.
CAUTION
: Could lead to serious injury in particular environments when operated
incorrectly.
WARNING
Incorrect installation could cause injury due to fire,
electric shock, the unit falling or leakage of water.
Consult the dealer from whom you purchased the
unit or special installer.
Do not install it yourself (customer).
When installed in an insufficiently strong place,
the unit could fall causing injury.
Install the unit securely in a place which can bear
the weight of the unit.
Incorrect connection and fixing could cause fire.
Use the specified wires to connect the indoor and
outdoor units securely and attach the wires firmly
to the terminal board connecting sections so the
stress of the wires is not applied to the sections.
If the electrical part cover of the indoor unit and/or
the service panel of the outdoor unit are not
attached securely, it could result in a fire or
electric shock due to dust, water, etc.
Attach the electrical part cover to the indoor unit
and the service panel to the outdoor unit securely.
The use of defective parts could cause an injury
due to a fire, electric shock, the unit falling, etc.
Be sure to use the part provided or specified parts
for the installation work.
Check that the refrigerant gas does not leak after
installation is completed.
Incorrect installation could cause a personal
injury due to fire, electric shock, the unit falling
or leakage of water.
Perform the installation securely referring to the
installation instruction.
If the capacity of the power circuit is insufficient
or there is incomplete electrical work, it could
result in a fire or an electric shock.
Perform electrical work according to the installation
manual and be sure to use an exclusive circuit.
CAUTION
If there is a defect in the drainage/piping work,
water could leak from the unit and household
goods could get wet and be damaged.
Perform the drainage/piping work according
to the installation instruction.
If gas leaks and accumulates in the area
surrounding the unit, it could cause an explosion.
Do not install the unit in a place where an
inflammable gas leaks.

4
INSTALLATION OF INDOOR, OUTDOOR UNIT
Read completely, then follow step by step.
Select the best location
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.
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.
■
Rooftop Installations:
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
More than 5cm
More than 5cm
More than 2.3m More than 5cm
More than 10cm More than 10cm
More
than 60cm
More than 60cm
More than 70cm
In case more than 5m
A
B
•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.
Outdoor unit
Indoor unit
A
B
A
Oil trap
Outdoor unit
Indoor unit
B
CAUTION
Install the indoor unit on the wall where the height
from the floors more than 2.3 meters.
CAUTION
18K(60Hz) 5/8" 1/4" 4 or 5 10 20 20
18K(50Hz) 1/2" 1/4" 4 or 5 15 30 30
24K(60Hz) 5/8" 1/4" 4 or 5 15 30 30
24K(50Hz) 5/8" 3/8" 4 or 5 15 30 30
Pipe Size
Capacity
(Btu/h) GAS LIQUID
Max.
length
A(m)
Additional
Refrigerant
(g/m)
Max.
Elevation
B(m)
Standard
Length
(m)

ENGLISH
5
How to fix installation plate
The wall you select should be strong and solid
enough to prevent vibration
Mount the installation plate on the wall with
four 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.
Measure the wall and mark thecenterline. 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.
5-7mm
(0.2~0.3")
Indoor WALL Outdoor
Installation Plate
Marking-off line
Thread
Weight
Type "A" screw
A
B
"D" "C"
Right rear pipingLeft rear piping
Hole center ø70mm
■ 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.
Drill a hole in the wall

6
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.
■ 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.
Burrs removal
■ 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.
A
B
Putting nut on
■ Remove flare nuts attached to indoorand
outdoor unit, then put them on pipe/tube
having completed burr removal.
(not possible to put them on after flaring
work)
C
Copper
pipe
90°Slanted Uneven Rough
Bar
Copper pipe
Clamp handle Red arrow mark
Cone
Yoke
Handle
Bar
"A"
Pipe Reamer
Point down
Flaring work
■ 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.
D
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.
E
Outside diameter A
mm
mm inch
1/4
3/8
1/2
5/8
ø6.35
ø9.52
ø12.7
ø15.88
0~0.5
0~0.5
0~0.5
0~1.0
Flare nut
Copper tube
Inclined
Inside is shiny without scratches
Smooth all round
Even length
all round
Surface
damaged Cracked Uneven thickness
= Improper flaring =

ENGLISH
7
Connection of piping
--Indoor
■ 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.
Route the indoor tubing and the drain hose
in the direction of rear left.
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.
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.
Press the lower left and right sides of the unit
against the installation plate until the hooks engage
into their slots(clicking sound).
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.
D
Connecting the pipings to the indoor unit and
drain hose to drain pipe.
■Align the center of the pipings and sufficiently
tighten the flare nut by hand.
E
A
B
C
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.
To remove the holder,
press the bottom of
chassis near the holder
upward and pull the tab
out of its hole.
Tubing holder
Pull
Press
2
1
Drain hose
Connecting
cable
Loop
Gas side
piping
Liquid side
piping
Drain hose
Drain hose
Connecting
cable
Indoor unit tubing Flare nut Pipings
For left rear piping
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.

8
Wrap the insulation material around the
connecting portion.
■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.
F
Route the indoor tubing and the drain hose to
the required piping hole position.
A
Insert the piping, drain hose and the connecting
cable into the piping hole.
B
Plastic bands Insulation material
Drain pipe
Connecting cable
Vinyl tape(narrow)
Connection
pipe
Connecting cable
Vinyl tape
(wide) Wrap with vinyl tape
Indoor
unit pipe
Pipe
Torque wrench
Indoor unit tubing
Spanner (fixed)
Connection pipe
Flare nut
Vinyl tape(narrow)
Adhesive
Drain pipe
Indoor unit drain hose
■When extending the drain hose at the indoor unit,
install the drain pipe.
■Tighten the flare nut with a wrench. ■Wrap the area which accommodates the rear
piping housing section with vinyl tape.
■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.
For right rear piping
Wrap with vinyl tape
Drain hose
Pipe
Vinyl tape(wide)
18K, 24K, 26K 1/2"[5.5kg.m] 1/4"[1.8kg.m]
5/8"[6.6kg.m] 3/8"[4.2kg.m]
Pipe Size[Torque]
Capacity
(Btu/h) GAS LIQUID

ENGLISH
9
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.
Tape the drain hose and the connecting cable.
• Connecting cable
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.
C
D
E
Installation plate
Spacer
Indoor unit
8cm
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.
■Tighten the flare nut with a wrench.
F
Wrap the insulation material around the
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.
G
Plastic bands Insulation material
Vinyl tape(narrow)
Connection
pipe
Connecting cable
Indoor
unit piping
Pipe
Vinyl tape
(wide) Wrap with vinyl tape
Indoor unit tubing Flare nut Pipings
Torque wrench
Indoor unit tubing
Spanner (fixed)
Connection pipe
Flare nut
Vinyl tape
Adhesive
Drain hose
Indoor unit drain hose
(narrow)
■When extending the drain hose at the indoor unit,
install the drain pipe.
■Wrap the area which accommodates the rear
piping housing section with vinyl tape.
18K, 24K, 26K 1/2"[5.5kg.m] 1/4"[1.8kg.m]
5/8"[6.6kg.m] 3/8"[4.2kg.m]
Pipe Size[Torque]
Capacity
(Btu/h) GAS LIQUID

10
Connection of the
pipes-Outdoor
Align the center of the pipings and
sufficiently tighten the flare nut by hand.
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.
A
B
Outdoor unit
Liquid side piping
(Smaller diameter)
Gas side
piping
(Bigger
diameter)
Torque wrench
Outdoor unit
Torque wrench
Reroute the pipings and the drain hose across
the back of the chassis.
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.
H
Indoor unit installation
■Remove the spacer.
■Ensure that the hooks are properly seated on the
installation plate by moving it left and right.
J
Drain hose
Connecting
cable
Piping for
passage through
piping hole
Tubing holder Hook
1
Push
2
I
Drain hose Vinyl tape(narrow)
Pipe
Wrap with
vinyl tape(wide)
■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.
Press the lower left and right sides of the unit against
the installation plate until the hooks engage into their
slots(clicking sound).
18K, 24K, 26K 1/2"[5.5kg.m] 1/4"[1.8kg.m]
5/8"[6.6kg.m] 3/8"[4.2kg.m]
Pipe Size[Torque]
Capacity
(Btu/h) GAS LIQUID

ENGLISH
11
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.)
1(L)
Terminals on the outdoor unit
Terminals on the indoor unit
1(L) 2(N)
2(N)
BROWN BLUE GREEN/YELLOW
BROWN BLUE GREEN/YELLOW
Terminals on the outdoor unit
Terminals on the indoor unit 1(L)
1(L)
2(N)
2(N)
3 4
34
BROWN BLUE G/Y BLACK RED
BROWN BLUE G/Y RED
BROWN BLUE BLACK
BLACK
G/Y RED
REDG/Y
BLUE
BROWN
• Cooling model
CONNECTING THE CABLE BETWEEN INDOOR UNIT AND OUTDOOR UNIT
• Heat pump model
Color of Wires
Color of Wires
Color of Wires
Color of Wires
Air
Conditioner
Main power source
If a power plug is not to be used, provide a circuit breaker between power source and the unit as shown below.
Circuit Breaker
Use a circuit
breaker or time
delay fuse.
CAUTION
CAUTION
The power cord connected to the indoor unit should
be complied with the following specifications
(Type H05VV-F approved by HAR or SAA).
The power connecting cable connected to the
indoor and outdoor unit should be complied with the
following specifications
(Type H07RN-F approved by HAR or SAA).
The connecting cable connected to the indoor and
outdoor unit should be complied with the following
specifications
(Type H07RN-F approved by HAR or SAA).
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.
Capacity
(Btu/h)
NORMAL CROSS
-SECTIONAL AREA
18K
24K
26K
1.5mm2
2.5mm2
Capacity
(Btu/h)
NORMAL CROSS
-SECTIONAL AREA
18K
24K
26K
1.5mm2
2.5mm2
NORMAL
CROSS-SECTIONAL
AREA 0.75mm2

12
Connect the cable to the
outdoor unit
Remove the control cover from the unit by
loosening the screw.
Connect the wires to the terminals on the
control board individually.
Secure the cable onto the control board
with the cord clamp.
Refix the control cover to the original
position with the screw.
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.
A
B
C
D
Terminal block
Over 5mm
Cover control
Connecting cable
Connecting cable
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 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. (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.
Outdoor Unit
CAUTION

CHECKING THE DRAINAGE AND FORMING THE PIPINGS
13
ENGLISH
Form 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 tapes.
■ 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.
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.
A
A
B
,
,
,
Trap is required to prevent water
from entering into electrical parts.
Seal small openings
around pipings with a
gum type sealer.
Taping
Drain
hose
Pipings
Connecting
cable
In cases where the Outdoor unit is
installed above the Indoor unit perform
the following.
■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.
C
,,
,,
,,
Trap
Trap
Checking the drainage
To remove the front panel from the indoor
unit, remove the front panel from the
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)
Pull the right and
the left side. Screw
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.
B
Drain piping
■ The drain hose should point downward for
easy drain flow.
C
■ Do not make drain piping.
Do not raise Accumulated
drain water Tip of drain hose
dipped in water
Air
Waving
Water
leakage Water
leakage Ditch
Less than
50mm gap
Water
leakage
Downward slope

14
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.
Air purging with vacuum
pump
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.
Leak test
■ Connect the manifold valve(with pressure
gauges) and dry nitrogen gas cylinder to
this service port with charge hoses.
■ 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.
Charge hose
Nitrogen gas
cylinder(in vertical
standing position)
Indoor unit
Outdoor unit
Lo Hi
Manifold valve
Pressure
gauge
A
B
■ 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 connectorat the nitrogen cylinder.
When the system pressure is reduced to normal,
disconnect the hose from the cylinder.
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.
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.
CAUTION
CAUTION

ENGLISH
15
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.
■ When the desired vacuum is reached, close the
"Lo" knob of the manifold valve and stop the
vacuum pump.
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.
C
D
(1) Remove the caps from the 2-way and 3-way
valves.
(2) Remove the service-port cap from the 3-way
valve.
(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.
Soap water method
Gas side
Liquid side
Cap
Hexagonal wrench
2-way valve
(Open)
3-way valve
(Close)
Required time for evacuation when 30 gal/h
vacuum pump is used
10 min. or more 15 min. or more
If tubing length is less
than 10m (33 ft) if tubing length is longer
than 10m (33 ft)
Indoor unit
Outdoor unit
Lo Hi
Manifold valve
Vacuum pump
Pressure
gauge
Open Close

TEST RUNNING
16
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.
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.
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.
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.
NOTE:
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.
A
C
B
Bolt
Tubin
g
connection
Outside ambient TEMP. The pressure of the gas side service valve
35°C(95°F)
4.5~5.5kg/cm2 G(63.9~78.1 P.S.I.G.)
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.
PUMP DOWN
3. Ensure the difference between the intake
temperature and the discharge is more than 8°C
(Cooling) or reversely (Heating).
4. For reference; the gas side pressure of optimum
condition is as below. (Cooling)
Discharge 
temperature
Discharge air
Intake temperature