Klimaire KSWT SERIES User manual

INSTALLATION INSTRUCTION
Air Conditioner Service Manual
Wall-mounted Split Type
KSWT SERIES

1. Characteristics of refrigerant
1.1 Temperature-pressure relationships in saturated condition
1.2 Strong/weak points of freon
1.2.1 Strong points
1) Chemical stability
2) No toxicity
3) By little corrosive action on metals, it is applicable to almost all metals.
4) The ratio of Cp/Cv is lower than ammonia and the discharge gas temperature is low, so air cooling type is available.
1.2.2 Weak points
1) A little amount of evaporation heat should circulate a great deal of liquid at the same refrigerating capacity.
2) When using for iron steels, scale occurs more rapidly than ammonia use due to hydrolysis .
3) Generally it is fused in lubricant.
4) Since it is not melted in water, water is separated and water closing occurs in capillary tube.
5) High price
-10 0 10 20 30 40 50 60 70 80
0
5
10
15
20
25
30
35 Saturation curve
Temperature(°C)
Pressure (kg/cm2 G)
R-12
INSTALLATION
Air Conditioner Service Manual
2

2. Tools required
2.1 Tools
Screw driver Hand drill Ruler, knife Gas leak detector
& soup water Thermometer Hex. wrench
(Large side: 4mm, 5mm)
Assembly,
disassmbly Indoor installation plate fixing
Ruler: Length &
distance
measurement.
Knife: Tape cutting Leak inspection
Temperature
measurement at
Indoor suction
inlet/discharge outlet.
Service valve
operating
Core drill
(diameter 70mm) Monkey spanner (300mm): 2EA Torque wrench Hook meter
(for current measurement)
Insulation
resistance meter Flare tool set
Connnection cable Winter cover Anti-vibration
rubber Band Adhesive Drain hose
Refrigerant pipe
(for high/low pressure)
Putty Vinyl tape Remocon fixture Fixture clamping
screw Remocon
Refrigerant circuit
connection to
Indoor/Outdoor. Chaging of wall-
through hole Wire & pipe
finishing Remocon hanger Remocon fixture fixing
Indoor-Outdoor
wire connnection Outdoor protection in a unusedseason
like winter
Vibration absorption
of outdoor
Wire & pipe
finishing Finishing Drainage
Wall through Indoor/Outdoor
pipe connection Indoor/outdoor pipe connection Current, voltage,
resistance
measurement
Insulation resistance
measurement
(Electric shock prevention)
Pipe cutting,
Burr removal
Level
Clamp meter
Thermometer
Drive torch Mega tester
2.2 Accessory
3
Remark: Some of the above parts are provided by the installer and not included in the standard air-conditioner.
Air Conditioner Service Manual
Air Conditioner Service Manual

7K, 9K 3/8"1/4"3or 5 5
12K 1/2"1/4 3.5 or 5
18K1/2"1/4" 4.5
24K5/8"3/8"5
3. Split type installation
3.1 Select the best location
3.1.1 Indoor unit
1) Do not have any heat or steam near the unit.
2) Select a place where there are no obstacles in front of
the unit.
3) Make sure that condensation drainage can be conve-
niently routed away.
4) Do not install near a doorway.
5) 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.
6) Use a stud finder to locate studs to prevent unneces-
sary damage to the wall.
3.1.2 Outdoor unit
1) If an awning is built over the unit to prevent direct sun-
light or rain exposure, make sure that heat radiation
from the condenser is not restricted.
2) 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.
3) Do not place animals and plants in the path of the
warm air.
4) Take the air conditioner weight into account and select
a place where noise and vibration are minimum.
5) Select a place so that the warm air and noise from the
air conditioner do not disturb neighbors.
6) 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.
3.2 Piping length and elevation
More than 5cm
More than 5cm
More than 2.3m More than 5cm
More than 10cm
More
than 60cm
More than 10cm
More than 60cm
More than 70cm
Pipe Size
Capacity
(Btu/h)
GAS LIQUID
Max.
length
A (m)
Additional
Refrigerant
(g/m)
Max.
Elevation
B(m)
Standard
Length
(m)
* Both gas and liquid interconnecting pipes must be
insulated as a pair, but it is not necessary to indi-
vidually insulate them.
In case more than 5m
• 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.
A
Oil trap
Outdoor unit
Indoor unit B
Outdoor unit
Indoor unit
A
B
Install the indoor unit on the wall where the height from the
floors more than 2.3 meters.
CAUTION
CAUTION
4
10
10
5
5
5
20
20
15
15
30
30
Air Conditioner Service Manual

3.3 How to fix installation plate
The wall you select should be strong and solid enough to
prevent vibration
3.3.1 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 center-
line using a level.
3.3.2 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.
•For right rear piping and left rear piping, draw a
line in the direction of the arrow marked "D". The
meeting point of the two lines is the center of the
hole.
5-7mm
(0.2~0.3")
Indoor WALL Outdoor
Installation Plate
Marking-off line
Thread
Weight
Type "A" screw
A,B
A,B,C
C
D
D
A,B,D
C
A
B,D
C
ø70mm
Left rear piping Right rear piping
Hole Center Installation plate
• 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.
3.4 Drill a hole in the wall
• The position of the center of the hole.
D
D
D
D
Left holecore position Right holecore position
5
Air Conditioner Service Manual

3.5.1 Flaring work
Main cause for gas leakage is due to defect in flaring
work. Carry out correct flaring work in the following
procedure.
A. Cut the pipes and the cable.
1) Use the piping kit accessory or the pipes pur-
chased locally.
2) Measure the distance between the indoor and the
outdoor unit.
3) Cut the pipes a little longer than measured dis-
tance.
4) Cut the cable 1.5m longer than the pipe length.
B. Burrs removal
1) Completely remove all burrs from the cut cross
section of pipe/tube.
2) Put the end of the copper tube/pipe in a downward
direction as you remove burrs in order to avoid
dropping burrs into the tubing.
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)
Copper
pipe 90° Slanted Uneven Rough
Bar
Copper pipe
Clamp handle Red arrow mark
Cone
Yoke
Handle
Bar
"A"
Pipe Reamer
Point down
Flare nut
Copper tube
D. 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.
E. Check
1) Compare the flared work with figure below.
2) If flare is noted to be defective, cut off the flared sec-
tion and do flaring work again.
Outside diameter A
mm
mm inch
1/4
3/8
1/2
5/8
ø6.35
ø9.52
ø12.7
ø15.88
1.0~1.3
0.8~1.0
0.5~0.8
0.5~0.8
Inclined
Inside is shiny without scratches
Smooth all round
Even length
all round
Surface
damaged Cracked Uneven thickness
= Improper flaring =
3.5 Flaring work and connection of piping
Air Conditioner Service Manual
6

3.5.2 Connection of piping--Indoor
1) Preparing the indoor unit's piping and drain hose for
installation through the wall.
2) Remove the plastic tubing retainer(see illustration
below) and pull the tubing and drain hose away from
chassis.
3) Replace the plastic tubing holder in the original posi-
tion.
A. Route the indoor
tubing and the
drain hose in the
direction of rear
right.
B. Insert the connecting cable into the indoor unit from
the outdoor unit through the piping hole.
1) Do not connect the cable to the indoor unit.
2) Make a small loop with the cable for easy connection
later.
3) Connecting cable
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.
Press the lower left and right sides of the unit against the
installation plate until the hooks engage into their slots(click-
ing sound).
C. 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.
E. 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.
NOTE: If the drain hose is routed inside the room, insulate the
hose with an insulation material*so that dripping from "sweat-
ing"(condensation) will not damage furniture or floors.
*Foamed polyethylene or equivalent is recommended.
Cooling Model
Capacity (Btu/h)
Heat Pump Model
Drain hose
Indoor tubing
Connecting
cable
Gas side
piping
Liquid side
piping
Drain hose
Indoor tubing
Connecting
cable Drain hose


74cm
Cable
Gas side piping
Liquid side piping
Length of con-
necting cable
Drain hose
Connecting
cable
Indoor unit tubing Flare nut Pipings
For right 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.
Air Conditioner Service Manual
7
7K,9K,12K,18K
24K

F. 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.
A. Route the indoor tubing with the drain hose to the
required piping hole position.
B. Insert the piping, drain hose and the connecting cable
into the piping hole.
Plastic bands Insulation material
Drain pipe
Connecting cable
Pipe
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.
3/8"[4.2kg.m]1/4"[1.8kg.m]
1/2"[5.5kg.m]1/4"[1.8kg.m]
24K5/8"[6.6kg.m]3/8"[4.2kg.m]
Pipe Size[Torque]
Capacity
(Btu/h)
GAS LIQUID
• 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 left rear piping
Wrap with vinyl tape
Drain hose
Pipe
Vinyl tape(wide)
Air Conditioner Service Manual
8
12K,18K
7K,9K

C. Insert the connecting cable into the indoor unit.
1) Don't connect the cable to the indoor unit.
2) Make a small loop with the cable for easy connection
later.
D. Tape the tubing, drain hose and the connecting
cable.
• Connecting cable
E. Indoor unit installation
1) Hang the indoor unit from the hooks at the top of the
installation plate.
2) Insert the spacer etc. between the indoor unit and the
installation plate and separate the bottom of the indoor
unit from the wall.
Cooling Model
Capacity (Btu/h)
Heat Pump Model
Installation plate
Spacer
Indoor unit
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.
• Tighten the flare nut with a wrench.
G. Wrap the insulation material around the connect-
ing 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
Vinyl tape(narrow)
Connection
pipe
Connecting cable
Indoor
unit piping
Pipe
Vinyl tape 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 vinly tape.
Loop
3/8"[4.2kg.m]1/4"[1.8kg.m]
1/2"[5.5kg.m]1/4"[1.8kg.m]
24K5/8"[6.6kg.m]3/8"[4.2kg.m]
Pipe Size[Torque]
Capacity
(Btu/h)
GAS LIQUID
Air Conditioner Service Manual
9
7K,9K,12K,18K
24K
12K,18K
7K,9K

3.5.3 Connection of the pipes-Outdoor
A. Align the center of the pipings and sufficiently tighten
the flare nut by hand.
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.
Liquid side piping
(Smaller diameter)
Gas side piping
(Bigger diameter)
Torque wrench
Outdoor unit
H. Reroute the pipings and the drain hose across the
back of the chassis.
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.
J. Indoor unit installation
1) Remove the spacer.
2) Ensure that the hooks are properly seated on the
installation plate by moving it left and right.
Drain hose
Connecting
cable
Piping for
passage through
piping hole
Taping
Wrap with vinyl tape
Vinyl tape
Drain hose
Pipe
• 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).
3/8"[4.2kg.m]1/4"[1.8kg.m]
1/2"[5.5kg.m]1/4"[1.8kg.m]
24K5/8"[6.6kg.m]3/8"[4.2kg.m]
Pipe Size[Torque]
Capacity
(Btu/h)
GAS LIQUID
Air Conditioner Service Manual
10
12K,18K
7K,9K

CAUTION
The power cord connected to the indoor unit should be
complied with the following specifications
(Type H05VV-F(Indoor), H07RN-F(Outdoor) approved
by HAR or SAA).
1
1
1
N
N
N
2
2
3
3
1NL
L
N
1
N
L
1
N
BROWN BLUE GREEN/YELLOW
BROWN BLUE
BROWN RED
BLUE
BROWN
BROWN WHITE
Power supply
BLUE
BROWN WHITE BLUE
GREEN/YELLOW
GREEN/YELLOW
RED
YELLOW
YELLOW
BLUE
GREEN/YELLOW
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 out-
door unit should be complied with the following specifi-
cations
(Type H07RN-F approved by HAR or SAA).
• 7K~18K cooling model
Terminal on the indoor unit
Terminal on the indoor unit
Terminal on the outdoor unit
Terminal on the outdoor unit
• 7K~18K heat pump model
Terminal on the indoor unit
Terminal on the outdoor unit
• 24K cooling model
.
3.6 Connecting the cable between indoor
unit and outdoor unit
3.6.1 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 indi-
vidually 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.)
NORMAL
CROSS-SECTIONAL
AREA 2.5mm2
(18K: 1.5mm2, 7K~14K: 1.0mm2)
NORMAL
CROSS-SECTIONAL
AREA 2.5mm2
(18K: 1.5mm2, 7K~14K: 1.0mm2)
NORMAL
CROSS-SECTIONAL
AREA 0.75mm2
Air Conditioner Service Manual
11
GREEN/YELLOW
Air
Conditioner
Main power source
Circuit Breaker
Use a circuit
breaker or time
delay fuse.
Circuit Breaker
Use a 25A circuit
breaker or time
delay fuse.
Air
Conditioner
Main power source
❒ ~18K Model
If a power plug is not to be used, provide a circuit breaker
between power source and the unit as shown below.
CAUTION
❒24K~ Model
If a power plug is not to be used, provide a circuit breaker
between power source and the unit as shown below.
. 24K heat pump model
L
N
123
YELLOW WHITE
Power supply
RED
LN
LN
Terminal on the indoor unit
Terminal on the outdoor unit
GREEN/YELLOW
BROWN
BLUE
BLUE
BROWN
GREEN/YELLOW
YELLOW
WHITE
RED
1
2
3

3.6.2 Connect the cable to the outdoor unit
A. Remove the control cover from the unit by loosen-
ing the screw.
Connect the wires to the terminals on the control
board individually.
B. Secure the cable onto the control board with the
cord clamp.
C. Refix the control cover to the original position with
the screw.
D. Use a recognized circuit breaker 20A(18K) ,
25A(24K) between the power source and
the unit. A disconnecting device to adequately dis-
connect all supply lines must be fitted.
Terminal block
Over 5mm
Control cover
Power cord
(power connecting
cable)
Connecting cable
Outdoor unit
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.
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.
CAUTION
Air Conditioner Service Manual
12

3.7.2 Form the piping
A. 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.
B In cases where the outdoor unit is installed below the
indoor unit perform the following.
1) Tape the piping, drain hose and connecting cable from
down to up.
2) Secure the tapped piping along the exterior wall using
saddle or equivalent.
,




Taping
Pipings
Connecting
cable
Drain
hose
Seal small openings
around pipings with a
gum type sealer.
Trap is required to prevent water
from entering into electrical parts.
C. In cases where the Outdoor unit is installed above
the Indoor unit perform the following.
1) Tape the piping and connecting cable from down to
up.
2) Secure the taped piping along the exterior wall. Form
a trap, to prevent water entering the room.
3) Fix the piping onto the wall by saddle or equivalent.
Trap
Seal small openings
around pipings with a
gum type sealer.
,




Trap
Trap is required to prevent water
from entering into electrical parts.
3.7 Checking the Drainage and forming
the pipings
3.7.1 Checking the drainage
A. To remove the front panel from the indoor unit,
remove the front panel from the indoor unit cabinet.
1) Set the air direction louvers up-and-down to the posi-
tion(horizontally) by hand.
2) Remove 3 screws that retain the front panel.
Pull the lower left and right sides of the grille toward
you and lift it off.
Grille
Remove screws (3places)
Chassis
B. To check the drainage.
1) Pour a glass of water on the evaporator.
2) Ensure the water flows through the drain hose of the
indoor unit without any leakage and goes out the drain
exit.
,,
,,
C. Drain piping
• The drain hose should point downward for easy drain
flow.
• Do not make drain piping.
Downward slope
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
Air Conditioner Service Manual
13

3.8 Air purging
3.8.1 Air purging
Air and moisture remaining in the refrigerant system
have undesirable effects as indicated below.
1) Pressure in the system rises.
2) Operating current rises.
3) Cooling(or heating) efficiency drops.
4) Moisture in the refrigerant circuit may freeze and
block capillary tubing.
5) Water may lead to corrosion of parts in the refrigera-
tion 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.
3.8.2 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 prop-
erly 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.
• 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.
• 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 con-
nector at the nitrogen cylinder. When the system pres-
sure 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
Air Conditioner Service Manual
14

C. Evacuation
• Connect the charge hose end described in the preced-
ing 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.
D. Finishing the job
1) With a service valve wrench, turn the valve stem of liq-
uid side valve counter-clockwise to fully open the
valve.
2) Turn the valve stem of gas side valve counter-clock-
wise to fully open the valve.
3) Loosen the charge hose connected to the gas side
service port slightly to release the pressure, then
remove the hose.
4) Replace the flare nut and its bonnet on the gas side
service port and fasten the flare nut securely with an
adjustable wrench. This process is very important to
prevent leakage from the system.
5) Replace the service valve caps at both the gas and
the liquid side and fasten them tight.
This completes air purging with a vacuum pump.
The air conditioner is now ready to test run.
(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 counter-
clockwise 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
Cover control
Outdoor unit
Gas side
(Bigger diameta)
Liquid side
(Smaller diameta)
Hexagonal
wrench
Service port cap
3-way valve
(close)
2-way valve
(open) Cap
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)
Lo Hi
Indoor unit
Outdoor unit
Manifold valve
Vacuum pump
Pressure
gauge
Open Close
Air Conditioner Service Manual
15

B. Settlement of outdoor unit
1) Anchor the outdoor unit with a bolt and nut
tightly and horizontally on a concrete or rigid mount.
2) When installing on the wall, roof or rooftop, anchor
the mounting base securely with a nail or wire assum-
ing the influence of wind and earthquake.
3) In the case when the vibration of the unit is conveyed
to the hose, secure the unit with an anti-vibration rub-
ber.
3.9 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.
A. 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.
NOTE:
•Use 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.
C. 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.
Bolt
Tubing connection
Outside ambient TEMP. The pressure of the gas side service valve
35°C(95°F)
4~6kg/cm2.G(56.8~85.2 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 out-
door 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 condi-
tion is as below.(Cooling)
Discharge air
Intake temperature
Discharge temperature
Air Conditioner Service Manual
16