MULTI TYPE ROOM AIR CONDITIONERS
INSTALLATION INSTRUCTIONS
(Refrigerant : R-410A)
ENGLISH
• This unit is charged with new refrigerant, R-410A.
• Be sure to use proper tools for R-410A, when installing the unit.
• 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.
ITALIANO
Installation Parts Provided
1. Type "A" screw
2. Installation Plate
ESPAÑOL
3. Type "B" screw
4. Holder Remote Control
FRANÇAIS
more than
20cm
DEUTSCH
more than
20cm
5. Copper pipe (Liquid side)
6. Copper pipe (Gas side)
7. Connecting cable
more than
70cm
Cooling & Heating Model
has included Drain Elbow.
P/No. : 3828A20012K
OUT-LINE OF INSTALLATION
Installation
Requirements
Required Parts
Required Tools
The following should be
always observed for safety .3
Installation of indoor, outdoor
unit ............................................4
❏ Level gauge
❏ Screw driver
❏ Electric drill
❏ Hole core drill(ø70mm)
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
❏ Pipes: Gas side........1/2", 3/8"
Liquid side .............1/4"
(Refer to page 4)
❏ Insulation materials
❏ Additional drain pipe
(Outer Diameter .......15.5mm)
Connecting the cable
between indoor unit and
outdoor unit ..........................11
❏ Installation plate
❏ Four type "A" screws
❏ Connecting cable
❏ 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
Checking the drainage and
Forming the piping ................13
❏ A glass of water
❏ Screw driver
Air purging ............................14
❏ Hexagonal wrench(4mm)
❏ Gas-leak detector
❏ Vacuum pump
❏ Gauge manifold R-410A
Test running..........................16
❏ Two type "B" screws
2
❏ Owner's manual
❏ Thermometer
❏ Holder Remote Control
THE FOLLOWING SHOULD BE ALWAYS OBSERVED FOR SAFETY
WARNING
WARNING
Could lead to death, serious injury, etc.
CAUTION
CAUTION
Could lead to serious injury in particular environments when operated incorrectly.
• After reading this manual, be sure to keep it together with the instruction manual in a handy place on the
customer's site.
WARNING
WARNING
Do not install it yourself (customer).
Perform the installation securely referring to
the installation manual.
• Incomplete installation could cause injury due to
fire, electric shock, the unit falling or a leakage
of water. Consult the dealer from whom you
purchased the unit or special installer.
• Incomplete installation could cause a personal
injury due to fire, electric shock, the unit falling or
a leakage of water.
Install the unit securely in a place which can
bear the weight of the unit.
Perform electrical work according to the
installation manual and be sure to use an
exclusive circuit.
• When installed in an insufficient strong place,
the unit could fall causing injured.
• 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.
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.
Check that the refrigerant gas due not leak
after installation is completed.
• Incomplete connecting and fixing could cause
fire.
Attach the electrical part cover to the indoor
unit and the service panel to the outdoor unit
securely.
Be sure to use the part provided or specified
parts for the installation work.
• If the electrical part cover if the indoor unit and/or • The use of defective parts could cause an injury or leakage
the service panel if the outdoor unit are not
of water due to a fire, electric shock, the unit falling, etc.
attached securely, it could result in a fire or
electric shock due to dust, water, etc.
CAUTION
CAUTION
Perform the drainage/piping work securely
according to the installation manual.
Do not install the unit in a place where an
inflammable gas leaks.
• If gas leaks and accumulates in the area
surrounding the unit, it could cause an
explosion.
• If there is a defect in the drainage/piping work,
water could drop from the unit and household
goods could be wet and damaged.
3
ENGLISH
• Be sure to read "THE FOLLOWING SHOULD ALWAYS BE 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.
INSTALLATION OF INDOOR, OUTDOOR UNIT
Read completely, then follow step by step.
Select the best location
■ 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.
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 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
Piping length and elevation
Pipe Size Standard Max.
Length Elevation
B (m)
GAS LIQUID (m)
Max.
length
A (m)
Additional
Refrigerant
(g/m)
3/8" 1/4"
7.5
7
15
20
1/2" 1/4"
7.5
7
15
30
More than 5cm
More than 2.3m
More than
5cm
Outdoor unit
CAUTION
CAUTION
Install the indoor unit on the wall where the
height from the floors more than 2.3 meters.
A
2. Outdoor unit
Indoor 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.
more than
more than
20cm
20cm
B
Outdoor unit
Oil trap
A
Indoor unit
B
In case more than 5m
CAUTION
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.
more than
70cm
4
How to fix installation
plate
A,B,C
C
A,B
A
1. 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.
Right rear piping
D
C B,D
The wall you select should be strong
and solid enough to prevent vibration
ENGLISH
11K Btu
Left rear piping
C
A,B,D D
Hole Center
Installation plate
ø70mm
17.5K Btu
Left rear piping
"D"
Right rear piping
"C"
Installation Plate
Hole Center
Marking-off line
Type "A" screw
ø70mm
■ For right rear piping and left rear piping, draw a
line in the direction of the arrow marked "A".
The meeting point of the two lines is the center
of the hole.
Thread
Weight
• The position of the center of the hole.
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.
Left holecore position
Right holecore position
A
A
A
A
7K, 8K, 9.5K Btu
Right rear piping
Left rear piping
Drill a hole in the wall
■ Drill the piping hole with a ø70mm
hole core drill. Drill the piping hole at
either the right or the left with the hole
slightly slanted to the outdoor side.
20mm
20mm
80mm
50mm
Hole center
ø70mm
WALL
10K, 12K, 14K, 15K Btu
D
C B,D
A
Indoor
Right rear piping
C
A,B
A,B,C
C
A,B,D D
Hole Center
Installation plate
Outdoor
5-7mm
Left rear piping
ø70mm
5
(0.2~0.3")
ø70mm
FLARING WORK AND CONNECTION OF PIPING
Flaring work
4. Flaring work
■ Carry out flaring work using dedicated flaring
tool for R-410A as shown below.
Main cause for gas leakage is due to
defect in flaring work. Carry out correct
flaring work in the following procedure.
Outside diameter
mm
inch
ø6.35
1/4
ø9.52
3/8
ø12.7
1/2
ø15.88
5/8
1. 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.
Firmly hold copper pipe in a die in the
dimension shown in the table above.
Slanted Uneven Rough
90°
Handle
"A"
Copper
pipe
A
mm
0~0.5
0~0.5
0~0.5
0~1.0
Bar
Bar
Yoke
Cone
2. 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.
Copper pipe
Clamp handle
Red arrow mark
5. 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.
Pipe
Reamer
Point down
Smooth all round
Inside is shiny without scratches
= Improper flaring =
3. 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)
Even length
all round
Flare nut
Copper tube
6
Inclined Surface Cracked Uneven
damaged
thickness
■ 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.
3. 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
Connecting
cable
Drain hose
Gas side
piping
Liquid side
piping
Tubing holder
To remove the holder,
press the bottom of
chassis near the holder
upward and pull the tab
out of its hole.
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.
2 Pull
1 Press
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.
4. 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
1. Route the indoor tubing and the drain
hose in the direction of rear left.
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).
5. 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.
Drain hose
2. 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 tubing
7
Flare nut
Pipings
ENGLISH
Connection of piping -Indoor
■ Tighten the flare nut with a wrench.
■ Wrap the area which accommodates the
rear piping housing section with vinyl tape.
Spanner (fixed)
Torque
wrench
Indoor
unit pipe
Wrap with vinyl tape
Connection
pipe
Vinyl tape
(wide)
Flare nut
Connection
pipe
Indoor
unit tubing
Connecting cable
Pipe
Pipe Size[Torque]
GAS
LIQUID
3/8"[4.2kg.m]
1/2"[5.5kg.m]
Vinyl tape(narrow)
1/4"[1.8kg.m]
1/4"[1.8kg.m]
■ 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
■ When extending the drain hose at the indoor
unit, install the drain pipe.
Pipe
Vinyl tape(wide)
Drain pipe
Drain hose
For right rear piping
Indoor unit
drain hose
Vinyl tape(narrow)
Adhesive
1. Route the indoor tubing and the drain
hose to the required piping hole position.
6. 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.
Plastic bands
Insulation material
2. Insert the piping, drain hose and the
connecting cable into the piping hole.
Connecting cable
Drain pipe
8
Pipe Size[Torque]
GAS
LIQUID
3/8"[4.2kg.m]
1/2"[5.5kg.m]
4. Tape the drain hose and the connecting
cable.
• Connecting cable
1/4"[1.8kg.m]
1/4"[1.8kg.m]
■ When extending the drain hose at the indoor
unit, install the drain pipe.
Drain hose
Indoor unit drain hose
Vinyl tape(narrow)
Adhesive
5. 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.
7. 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.
Indoor unit
Spacer
Installation plate
8cm
Plastic bands
Insulation material
6. 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.
Indoor unit tubing
Flare nut
Pipings
Connection
pipe
Vinyl tape
(wide)
■ Tighten the flare nut with a wrench.
Spanner (fixed)
Torque
wrench
Indoor
unit piping
Wrap with vinyl tape
Pipe
Flare nut
Connection
pipe
Connecting
cable
Indoor
unit tubing
9
Vinyl tape
(narrow)
ENGLISH
3. 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.
■ 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.
Connection of the pipesOutdoor
Pipe
Drain hose
1. Align the center of the pipings and
sufficiently tighten the flare nut by
hand
Vinyl tape
(narrow)
Wrap with
vinyl tape(wide)
8. Reroute the pipings and the drain hose
across the back of the chassis.
Piping for
passage through
piping hole
9. 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.
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.
Pipe Size[Torque]
GAS
LIQUID
3/8"[4.2kg.m]
1/2"[5.5kg.m]
Tubing holder
1 Hook
1/4"[1.8kg.m]
1/4"[1.8kg.m]
2 Push
10. Indoor unit installation
■ Remove the spacer.
■ Ensure that the hooks are properly seated on
the installation plate by moving it left and
right.
Outdoor unit
A-UNIT
Gas side piping
B-UNIT
Connecting
cable
Liquid side piping
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
10
CONNECTING THE CABLE BETWEEN INDOOR UNIT AND 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.
Terminal on the OUTDOOR UNIT
1(L)
2(N)
3
3
2(N)
1(L)
1(L)
2(N)
Outdoor unit
Terminal block
Power cord
1(L)
2(N)
3
1(L)
2(N)
Over 5mm
3
Terminal on the INDOOR UNIT
Terminal on the INDOOR UNIT
A-UNIT
B-UNIT
Holder for
power supply
cord
Terminal on the OUTDOOR UNIT
1(L) 2(N)
1(L) 2(N) 3
3 2(N) 1(L) 3
Cover control
Power cord
Connecting
cable
1(L) 2(N)
1(L) 2(N)
3
3
1(L) 2(N)
Power cord
3
Terminal on the INDOOR UNIT Terminal on the INDOOR UNIT Terminal on the INDOOR UNIT
A-UNIT
B-UNIT
C-UNIT
CAUTION
The power cord connected to the outdoor unit
should be complied with the following
specifications (Rubber insulation, type H05RNF approved by HAR or SAA).
Terminal on the OUTDOOR UNIT
1(L)
2(N)
3
4
3
4
1(L)
2(N)
1(L)
2(N)
3
4
1(L)
2(N)
3
ø8.5mm
Power cord
4
Terminal on the INDOOR UNIT
Terminal on the INDOOR UNIT
A-UNIT
B-UNIT
GN
Terminal on the OUTDOOR UNIT
1(L) 2(N) 1(L) 2(N) 3(A) 3(B)
NORMAL
20
m
CROSS-SECTIONAL m
2
AREA 2.5mm
Power cord
3
1(L) 2(N)
1(L) 2(N)
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).
3
Terminal on the INDOOR UNIT Terminal on the INDOOR UNIT
B-UNIT
ø7.5mm
A-UNIT
Terminal on the OUTDOOR UNIT
3
2(N) 1(L)
3
3
/YL
2(N) 1(L)
3
1(L) 2(N)
Power cord
GN
1(L) 2(N)
3
1(L) 2(N)
3
1(L) 2(N)
3
1(L) 2(N)
3
Terminal on the INDOOR UNIT Terminal on the INDOOR UNIT Terminal on the INDOOR UNIT Terminal on the INDOOR UNIT
A1-UNIT
A2-UNIT
B1-UNIT
/YL
NORMAL
20
m
CROSS-SECTIONAL m
2
AREA 0.75mm
B2-UNIT
11
ENGLISH
2. Secure the cable onto the control board with
the holder (clamper).
3. Refix the cover control to the original position
with the screw.
4. Use a recongnized circuit breaker between the
power source and the unit. A disconnection
device to adequately disconnect all supply
lines must be fitted.
Connection of the cable
CAUTION
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
Main power source
Air
Circuit Breaker Conditioner
Use a circuit
breaker or time
delay fuse.
(14K, 15K, 19K, 20K, 21K)
Circuit Breaker
Use a 25A circuit
breaker or time
delay fuse.
(30K)
CAUTION
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 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.
12
CHECKING THE DRAINAGE AND FORMING THE PIPINGS
Form the piping
1. To remove the front panel from the
indoor unit, remove the front panel
from the indoor unit cabinet.
■ Set the air direction louvers up-anddown 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.
(7K, 8K, 9.5K Btu models: 2EA,
10K, 12K, 14K, 15K Btu models: 3EA)
1. 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.
Pull the right and
the left side.
Screw
2. 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
Seal a small
opening around
the pipings with
gum type sealer.
2. 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
Plastic
band
Connecting
cable
Power supply
cord
• Trap is required to prevent water from entering
into electrical parts.
3. Drain piping
■ The drain hose should point downward
for easy drain flow.
Downward slope
3. 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.
Seal a small opening
around the pipings
with gum type sealer.
Trap
■ Do not make drain piping.
Do not raise
Water
leakage
Accumulated
drain water
Air
Water Waving
leakage
Tip of drain hose
dipped in water
Water
leakage
Less than
50mm gap
Ditch
13
ENGLISH
Checking the drainage
AIR PURGING
■ 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. Do a leak test
of all joints of the tubing(both indoor and outdoor)
and both gas and liquid side service valves.
If bubbles come out, the pipes have leakage. 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.
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.
Indoor unit
Air purging with vacuum
pump
1. 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.
Outdoor unit
2. Leak test
■ Connect the manifold valve(with
pressure gauges) and dry nitrogen gas
cylinder to this service port with charge
hoses.
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.
Charge hose
■ Pressurize the system to no more than
150 P.S.I.G. with dry nitrogen gas and
close the cylinder valve when the
gauge reading reached 150 P.S.I.G.
Next, test for leaks with liquid soap.
CAUTION
To avoid nitrogen entering the refrigerant system in a
liquid state, the top of the cylinder must be higher than
its bottom when you pressurize the system. Usually, the
cylinder is used in a vertical standing position.
14
Nitrogen gas
cylinder(in vertical
standing position)
Outdoor unit
A-UNIT
3-way valve
(Close)
2-way valve
(Open)
Gas side piping
3-way valve
(Close)
Liquid side piping
B-UNIT
2-way valve
(Open)
Cap
Required time for evacuation when 30 gal/h
vacuum pump is used
If tubing length is less than
10m (33 ft)
10 min. or more
Hexagonal wrench
if tubing length is longer
than 10m (33 ft)
15 min. or more
■ When the desired vacuum is reached, close
the "Lo" knob of the manifold valve and stop
the vacuum pump.
Indoor unit
CAUTION
Use vacuum pump equipped with check valve
applied to be prevented from flowing backward.
4. 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 counterclockwise 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.
Outdoor unit
Manifold valve
Pressure
gauge
Lo
Hi
Open
Vacuum pump
15
Close
ENGLISH
3. 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.
TEST RUNNING
Intake temperature
1. Check that all tubing and wiring have been
properly connected.
2. Check that the gas and liquid side service
valves are fully open.
Discharge air
1. Prepare remote control
1 Remove the battery cover
by pulling it according to
the arrow direction.
2 Insert new batteries
making sure that the (+)
and (–) of battery are
installed correctly.
3 Reattach the cover by
pushing it back into
position.
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
8.5~9.5kg/cm2 G(120~135 P.S.I.G.)
35°C(95°F)
NOTE: If the actual pressure are higher than
shown, the system is most likely overcharged, and charge should be
removed. If the actual pressure are
lower than shown, the system is most
likely undercharged, and charge should
be added.
The air conditioner is now ready for use.
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.
2. 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.
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.
Bolt
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. But,
this refrigerant gas must be recovered .
Don't vent the refrigerant in the atmosphere.
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.
Tubing connection
3. 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 (Cooling) or reversely (Heating).
16
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