Installation Manual_CTXS09_Indoor Unit
3P141697-5B M04B139
Indoor Unit Installation
• Do not install the air conditioner where gas leakage would be exposed to open flames.
If the gas leaks and builds up around the unit, it may catch fire.
• Establish drain piping according to the instructions of this manual. Inadequate piping may cause water damage.
• Note for installing the outdoor unit. (For heat pump model only.) In regions of the country where the outside temperature is at or
below the freezing point, the drain may freeze. If so, it is recommended that an electric heater be installed in order to protect the drain from freezing.
• Tighten the flare nut according to the specified torque. A torque wrench should be used.
If the flare nut is tightened too much, the flare nut may crack over time and cause refrigerant leakage.
Safety Precautions
• Do not touch the heat exchanger fins.
Improper handling may result in injury.
• Read these Safety Precautions carefully to ensure correct installation.
• This manual classifies the precautions into WARNINGS and CAUTIONS. Be sure to follow all the
precautions below: they are all important for ensuring safety.
• Be very careful about product transportation.
Some products use PP bands for packaging. Do not use any PP bands for a means of transportation. It is dangerous.
Failure to follow any of WARNING is likely to result in such grave consequences as death or serious injury.
Failure to follow any of CAUTION may in some cases result in grave consequences.
Be sure to establish a proper
earth grounding connection.
Never attempt.
A Mounting plate
• After completing installation, test the unit to check for installation errors. Give the user adequate instructions
concerning the use and cleaning of the unit according to the Operation Manual.
B Mounting plate fixing screws
C Air-purifying filter with
photocatalytic deodorizing function
• Installation should be left to the authorized dealer or another trained professional.
F Fixing screws for remote controller
M4 × 25mm (M3/16” × 1”L)
holder M3 × 20mm (M1/8” × 13/16”L)
G AAA dry-cell batteries
Improper installation may cause water leakage, electrical shock, fire, or equipment damage.
L Installation manual
here for right-bottom piping
• Be sure to use the supplied or exact specified installation parts.
Use of other parts may cause the unit to come to lose, water leakage, electrical shock, fire or equipment damage.
Bind coolant pipe
and drain hose
together with
insulating tape.
Choosing a Site
• Electrical work should be carried out in accordance with the installation manual and the national, state and local electrical wiring codes.
• Be sure to use a dedicated power circuit. Never use a power supply shared by another appliance. Follow all appropriate electrical codes.
• For wiring, use a wire or cable long enough to cover the entire distance with no splices if possible.
Do not use an extension cord. Do not put other loads on the power supply. Use a only a separate dedicated power circuit.
• Before choosing the installation site, obtain user approval.
The indoor unit should be sited in a place where:
the restrictions on installation specified in the indoor unit installation drawings are met,
both air intake and exhaust have clear paths met,
the unit is not in the path of direct sunlight,
the unit is away from the source of heat or steam,
there is no source of machine oil vapour (this may shorten indoor unit life),
cool air is circulated throughout the room,
the unit is away from electronic ignition type fluorescent lamps (inverter or rapid start type) as they may shorten the
remote controller range,
8) the unit is at least 3.5 ft away from any television or radio set (unit may cause interference with the picture or sound).
(Failure to do so may cause abnormal heat, electric shock,fire or equipment damage.)
• Use the specified types of wires for electrical connections between the indoor and outdoor units. Follow all state and local electrical codes.
Firmly clamp the interconnecting wires so their terminals receive no external stresses. Incomplete connections or clamping may cause terminal overheating, fire or euipment damage.
• After connecting all wiring be sure to shape the cables so that they do not put undue stress on the electrical covers, panels or terminals.
Install covers over the wires. Incomplete cover installation may cause terminal overheating, electrical shock,fire or equipment damage.
• When installing or relocating the system, be sure to keep the refrigerant circuit free from all substances other than the specified refrigerant (R410A), such as air.
(Any presence of air or other foreign substance in the refrigerant circuit causes an abnormal pressure rise which may result in rupture, resulting in injury.)
• When installing the unit in a small room, take measures against to keep refrigerant concentration from exceeding allowable safety limits in the event of refrigerant leakage.
Contact the place of purchase for more information. Excessive refrigerant in a closed ambient can lead to oxygen deficiency.
• If any refrigerant has leaked out during the installation work, ventilate the room.
Indoor unit.
Wireless remote controller.
1) Turn on all the fluorescent lamps in the room, if any, and find the site where remote control signals are properly
received by the indoor unit (within 23 ft).
(The refrigerant produces a toxic gas if exposed to flames.)
• After all installation is complete, check to make sure that no refrigerant is leaking.
• During pump-down, stop the compressor before removing the refrigerant piping. If the compressor is still running and the shut-off valve is open during
pump-down, air will be sucked in when the refrigerant piping is removed, causing abnormally high pressure which could lead to equipment damage or and personal injury.
• During installation, attach the refrigerant piping securely before running the compressor.
If the compressor is not attached and the shut-off valve is open during pump-down, air will be sucked in when the compressor is run, causing
abnormally high pressure whichcould lead to equipment damage and personal injury.
Incomplete or inadequate grounding may cause equipment damage, or electrical shock and personal injury. A high surge current from
lightning or other sources may cause damage to the air conditioner.
Indoor Unit Installation Drawings
No g
Packaging material
Grasp the packaging material which
is in the center of the front panel,
with one hand, and lightly pull the
front panel up and toward you.
pipe hole
with putty.
13/16 in or more from ceiling
Front panel
Cut thermal insulation
pipe to an appropriate
length and wrap it with
tape, making sure that no
gap is left in the insulation
pipe’s cut line.
• Removal method
2) Pull toward you.
1) Install the front grille and firmly engage the upper hooks (3 locations).
2) Install 2screws of the front grill.
3) Install the air filter and then mount the front panel.
• Installation method
Align the tabs of the front panel with the
grooves, and push all the way in. Then close
slowly. Push the center of the lower surface
of the panel firmly to engage the tabs.
Push the
rotating shaft
of the front
panel into the
¡¡¡ mark area
(3 locations)
• Removal method
1) Remove front panel to remove the air filter.
2) Remove the front grille. (2 screws)
3) In front of the
mark of the front
grille, there are 3 upper hooks. Lightly pull
the front grille toward you with one hand,
and push down on the hooks with the
fingers of your other hand.
Service lid
Opening service lid
Service lid is opening/closing type.
Opening method
1) Remove the service lid screws.
2) Lift the service lid upward.
Lightly pull the front
grille toward you with
one hand, and push
down on the hooks with
the fingers of your other
hand. (3 locations)
Upper hook
Upper hook
When two indoor units are
installed in one room, the
two wireless remote
controllers can be set for
different addresses.
1) In the same way as when
connecting to an HA
system, remove the metal
plate electrical wiring
2) Cut the address jumper
3) Cut the address jumper
Tabs (upper 3 locations)
Flare’s inner
surface must
be flaw-free.
(Cut exactly at
right angles.)
Remove burrs
The pipe end must
be evenly flared in
a perfect circle.
2 3/16
φ3 1/8
2 1/16
φ3 1/8
Intelligent-eye sensor
1) Do not hit or violently push the Intelligent-eye sensor. This can lead to damage and malfunction.
2) Do not place large objects near the sensor. Also keep heating units or humidifiers outside the
sensor’s detection area.
2 3/8
2 15/16
12 1/8
3 15/16
2 1/16 3 9/16
mounting - plate
retention spots
(6 spots in all)
a Dangle a weighted thread and align thread with vertical arrow.
(Bolt size : M3/8)
3 15/16
11 7/16
M3 × 20mm
(M1/8” × 13/16”L)
controller holder
b Place a leveler
on raised tab.
(Bolt size : M3/8)
4 15/16
3 7/8
1 3/4
31 1/4
Drain hose position hole φ3 1/8
* The removed pipe port cover can be
kept in the mounting plate pocket.
Gas pipe end
Liquid pipe end
Removed pipe
port cover
A Mounting plate
Use tape
as shown.
Position the
end of tape
measure at ∇.
Drain piping.
The drain hose should
be inclined downward.
1) Connect the drain hose, as described
No trap is permitted.
Do not put the end
of the hose in water.
Drain hose
Vinyl chloride
drain pipe
Shape wires so that the service
lid will fit securely.
2) Remove the air filters and pour some
water into the drain pan to check the water
flows smoothly.
3) When drain hose requires extension,
obtain an extension hose commercially
Be sure to thermally insulate the indoor
section of the extension hose.
Indoor unit
drain hose
Extension drain hose
Heat insulation tube
(Field supply)
L1 L 2
4) When connecting a rigid polyvinyl chloride pipe (nominal diameter
1/2in) directly to the drain hose attached to the indoor unit as with
embedded piping work, use any commercially available drain
socket (nominal diameter 1/2in) as a joint.
Drain hose supplied with
the indoor unit
Commercially available drain
(nominal diameter 1/2”)
Commercially available rigid
polyvinyl chloride pipe
(nominal diameter 1/2”)
Trial operation and testing.
• In cooling mode, select the lowest programmable temperature; in heating mode, select the highest
programmable temperature.
1) Trial operation may be disabled in either mode depending on the room temperature.
Use the remote controller for trial operation as described below.
2) After trial operation is complete, set the temperature to a normal level (78˚F to 82˚F in cooling mode, 68˚F to
75˚F in heating mode).
3) For protection, the unit disables restart operation for 3 minutes after it is turned off.
Set exactly at the position shown below.
Flare tool for R410A
Conventional flare tool
Clutch-type (Rigid-type) Wing-nut type (Imperial-type)
0 ~ 0.020”
0.039 ~ 0.059”
0.059 ~ 0.079”
1-3 Carry out the test operation in accordance with the Operation Manual to ensure that all functions and
parts, are working properly.
• The air conditioner requires a small amount of power in its standby mode. If the system is not to be used for
some time after installation, shut off the circuit breaker to eliminate unnecessary power consumption.
• If the circuit breaker trips to shut off the power to the air conditioner, the system will restore the original
operation mode when the circuit breaker is opened again.
1) Press ON/OFF button to turn on the system.
2) Simultaneously press centor of TEMP button and MODE button.
3) Press MODE button twice.
(“ ” will appear on the display to indicate that Trial Operation mode is selected.)
4) Trial run mode terminates in approx. 30 minutes and switches into normal mode. To quit a trial
operation, press ON/OFF button.
Flare nut tightening torque
Gas side
Liquid side
1/2 inch
1/4 inch
36.5~44.5ft • Ibf
10.4~12.7ft • Ibf
Test items.
Test items
Valve cap tightening torque
Piping union
Gas side
Liquid side
1/2 inch
1/4 inch
35.5~44.0ft • Ibf
15.9~20.2ft • Ibf
Indoor and outdoor units are installed properly on
solid bases.
Fall, vibration, noise
No refrigerant gas leaks.
Incomplete cooling/heating function
Refrigerant gas and liquid pipes and indoor drain
hose extension are thermally insulated.
Water leakage
Drain line is properly installed.
Water leakage
System is properly ground to earth.
Electrical leakage
The specified wires are used for interconnecting
wire connections.
Inoperative or burn damage
Indoor or outdoor unit’s air intake or exhaust has
clear path of air.
Shut-off valves are opened.
Incomplete cooling/heating function
Indoor unit properly receives remote controller
Flare nut
Service port cap tightening torque
Leveling mounting plate
5) Replace the electrical
wiring cover as it was,
and pull the harness
around, as shown
in the figure.
1-1 Measure the supply voltage and make sure that it falls in the specified range.
1-2 Trial operation should be carried out in either cooling or heating mode.
Make sure that the
flare nut is fitted.
7.9~10.8ft • Ibf
Recommended mounting-plate retention spots and Dimensions
D Wireless
remote controller
Trial operation from remote controller.
Installing the mounting plate.
Before screwing the remote
controller holder to the wall,
make sure that control
signals are properly
received by indoor unit.
1) Align the centers of both flares and tighten the flare nuts 3 or 4 turns by hand. Then tighten them fully with
the torque wrenches.
• Use torque wrenches when tightening the flare nuts to prevent damage to the flare nuts and escaping gas.
2) To prevent gas leakage, apply refrigeration machine oil on both inner and outer surfaces of the flare. (Use
refrigeration oil for R410A)
• The mounting plate should be installed on a wall which can support the weight of the indoor unit.
1) Temporarily secure the mounting plate to the wall, make sure that the panel is completely level, and mark the boring points on the wall.
2) Secure the mounting plate to the wall with screws.
4) Attach the connection cord to
the S21 connector and pull the
harness out through the
notched part in the figure.
Run Test and Final Check
Refrigerant piping.
Coat here with refrigeration machine oil
3) Remove the metal
plate electrical
wiring cover.
1) Do not use spliced wires, stand wires, extension cords, or starbust
connections, as they may cause overheating, electrical shock, or fire. Follow
all Local, and State electrical codes.
2) Do not use locally purchased electrical parts inside the product. (Do not
overload the circuit by adding drain pump or other electrical equipment to unit
terminals.) Doing so may cause electric shock or fire.
3) When carrying out wiring connection, take care not to pull at the conduit.
Torque wrench
Insert the upper side of the C Air-purifying filter
with photocatalytic deodorizin function into the tabs
(upper 3 locations),push the lower side of the filters
up a little and into the tabs (lower 2 locations).
Flaring the pipe end.
Indoor Unit Installation
Metal plate
electrical cover
1) Do not use mineral oil on flared part.
2) Prevent mineral oil from getting into the system as this would reduce the unit life.
3) Never use piping which has been used for previous installations. Only use parts which are provided with the
4) Do never install a refrigerant drier to this unit.
5) The drying material may dissolve and damage the system.
6) Incomplete or improper flaring may cause refrigerant gas leakage.
J4 Address
HA connector
Main body
Terminal block
Electrical component box
JA Address
Tabs (lower 2 locations)
Remove pipe
port cover
here for leftside piping
4. How to set the different
3. Removing and installing front grille.
Air filters
Place both hands under the center of the front
grille, and while pushing up, pull it toward you.
• Installation method
Hook fingers on the panel protrusions on the left and right of the main body,
and open until the panel stops. Slide the front panel sideways to disengage
the rotating shaft. Then pull the front
panel toward you to remove it.
Upper hook
Intelligent-eye sensor
C Air-purifying filter with photocatalytic
deodorizing function
2. Removing and installing front panel.
Wrap the insulation pipe with
the finishing tape from bottom
to top.
115/16 in or more from walls
(on both sides)
Be sure to wear protection gloves.
Lift the panel
slightly and pull
The mounting plate
should be installed on a
wall which can support the
weight of the indoor unit.
Lightly lift.
Outer wall
1 23
Do not apply lubricating
oil (refrigerant machine
oil) when inserting
Application of causes
deterioration and drain
leakage of the plug
Insert a hexagon wrench (3/16in)
1) Cut the pipe end with a pipe cutter.
2) Remove burrs with the cut surface facing downward
so that the chips do not enter the pipe.
3) Put the flare nut on the pipe.
4) Flare the pipe.
5) Check that the flaring is properly made.
1) Push up.
M3/16” × 1/2”L
<When there is no work space because the unit is close to ceiling>
• Removal method
Inner wall
Refrigerant piping work
Installation Tips
1. Removing packaging material.
1 15/16”
or more
Notched part
With a Multi indoor unit , install as
Wire retainer
described in the installation manual
supplied with the Multi outdoor unit.
Use the specified wire type.
1) Strip wire ends (9/16in).
2) Match wire colours with terminal
numbers on indoor and outdoor unit’s terminal
Lock nut
blocks and firmly screw wires to the corresponding terminals.
3) Connect the earth wires to the corresponding terminals.
4) Pull wires to make sure that they are securely
latched up, then retain wires with wire retainer.
5) In case of connecting to an adapter system. Run the
remote controller cable and attach the S21 connector
Outdoor unit
as the illustration above.
wire length exceeds
6) Shape the wires so that When
33ft, use AWG14 wires.
the service lid fits
securely, then close Indoor
Earth leakage
circuit breaker
service lid.
60Hz 208/230V
How to set drain plug
• Be sure to install a ground fault circuit interrupter breaker. Failure to install a ground fault circuit interrupter breaker may result in electrically shocks or personal injury.
A Mounting plate
Left-bottom piping
2) Be sure to connect the drain
hose to the drain port in place
of a drain plug.
• Install an leak circuit breaker, as required. If an leak circuit breaker is not installed, electric shock may result.
• Be sure to establish a ground. Do not ground the unit to a utility pipe, arrester, or telephone ground.
Insert drain hose
to this depth so
it won’t be pulled
out of drain pipe.
Wrap insulating tape around the bent portion
of refrigerant pipe.
Overlap at least half the width of the tape
with each turn.
1) Insert the drain hose to this
depth so it wont be pulled out
of the drain pipe.
3-2. Left-side, left-back, or left bottom piping
1) Attach the drain hose to the
underside of the refrigerant
pipes with adhesive vinyl
Remove pipe port cover here for left-bottom piping
(The refrigerant produces a toxic gas if exposed to flames.)
HA cord
Left-side, left-back, or left bottom piping
4) Open the front panel, then
Hang indoor unit’s hook here.
open the service lid. (Rifer to
Installation tips)
A Mounting plate
5) Pass the interconnecting
When stripping the
wires from the outdoor unit
ends of interconnecting
in advance, bind
through the feed-through wall wires
right ends of wires with
insulating tape.
hole and then through the
Wire guide
back of the indoor unit. Pull
them through the front side.
Bend the ends of tie wires upward in advance for easier work.
(If the interconnecting wire ends are to be stripped first, bundle
wire ends with adhesive tape.)
6) Press the indoor unit’s bottom panel with both hands to set it
on the mounting plate hooks. Make sure the wires do not catch
on the edge of the indoor unit.
Insufficient capacity or incomplete electrical work may cause electrical shock, fire or equipment damage.
Bind with plastic
3-3. Wall embedded piping
Follow the instructions given under
• Install the air conditioner on a solid base that is level and can support the unit's weight.
An inadequate base or incomplete installation may cause injury or equipment damage in the event the unit falls off the base or comes loose.
Remove the front grille. (3 screws)
Remove the electrical wiring box. (1 screw)
Remove the metal plate electrical wiring cover. (4 tabs)
Attach the connection cord to the S21 connector and pull the
harness out through the notched part in the figure.
5) Replace the electrical wiring cover as it was, and pull the harness
around, as shown in the figure
5) Pull in the interconnecting wires.
6) Connect the inter-unit piping.
7) Wrap the refrigerant pipes and drain hose together with insulation
tape as right figure, in case of setting the drain hose through the back
of the indoor unit.
8) While exercising care so that the
Drain hose
interconnecting wires do not catch indoor
unit, press the bottom edge of indoor unit
with both hands until it is firmly caught by
the mounting plate hooks. Secure
Bottom frame
H M3/16” × 1/2”L (2 point)
indoor unit to the mounting plate with
screws (M3/16” × 1/2”L).
Right-back piping
When connecting to an HA system.
A Mounting plate
Caulk this hole
with putty or
caulking material.
A Mounting plate
3) Pass the drain hose and
refrigerant pipes through the wall
hole, then set the indoor unit on
the mounting plate hooks by
using the markings at the top of
the indoor unit as a guide.
M4 × 12mm (M3/16” × 1/2”L)
Incomplete installation may cause water leakage, electrical shock, fire or equipment damage.
H Indoor unit fixing screws
D Wireless remote controller
• Install the air conditioner according to the instructions given in this manual.
K Operation manual
E Remote controller holder
3) Shape the refrigerant pipe along the pipe path marking on the
mounting plate.
4) Pass drain hose and refrigerant pipes through the wall hole,
then set the indoor unit on mounting plate hooks, using the
markings at the top of indoor unit as a guide.
Installing indoor unit.
3-1. Right-side, right-back, or right-bottom piping
1) Attach the drain hose to the
underside of the refrigerant pipes
with adhesive vinyl tape.
2) Wrap the refrigerant pipes and Remove pipe port cover
here for right-side piping
drain hose together with
insulation tape.
Remove pipe port cover
• The following safety symbols are used throughout this manual:
Be sure to observe this instruction.
Boring a wall hole and installing wall embedded pipe.
• For walls containing metal frame or metal board, be sure to use a
wall embedded pipe and wall cover in the feed-through hole to
prevent possible heat, electrical shock, or fire.
• Be sure to caulk the gaps around the
pipes with caulking material to prevent Wall embedded pipeInside
(field supply)
water leakage.
1) Bore a feed-through hole of 3 1/8in in the
φ3 1/8”
wall so it has a down slope toward the
Wall hole cover
(field supply)
Wall embedded pipe
(field supply)
2) Insert a wall pipe into the hole.
3) Insert a wall cover into wall pipe.
4) After completing refrigerant piping, wiring, and drain piping, caulk
pipe hole gap with putty.
φ 11/16”
φ 11/16”
Safety Precautions
2-1. Caution on piping handling
Be sure to
1) Protect the open end of the pipe against dust and moisture.
place a cap.
2) All pipe bends should be as gentle as possible. Use a pipe
If no flare cap is
bender for bending.
available, cover
the flare mouth
(Bending radius should be 1 3/16 to 1 9/16in or larger.)
with tape to keep
dirt or water out.
2-2. Selection of copper and heat insulation materials
• When using commercial copper pipes and fittings, observe the following:
Inter-unit wiring
1) Insulation material: Polyethylene foam
Gas pipe
Liquid pipe
Heat transfer rate: 0.041 to 0.052 kW/mK (0.024-0.030
Refrigerant gas pipe’s surface temperature reaches 230˚F max.
Choose heat insulation materials that will withstand this
Gas pipe
Liquid pipe
2) Be sure to insulate both the gas and liquid piping and to provide
Finishing tape
Drain hose
insulation dimensions as below.
Gas side
Liquid side
Gas pipe thermal insulation
Liquid pipe thermal insulation
09 class
09 class
09 class
09 class
O.D. 1/4in
I.D. 0.551-0.630in
O.D. 1/2in
Thickness 0.031in
I.D. 0.315-0.393in
Thickness 0.393in Min.
3) Use separate thermal insulation pipes for gas and liquid refrigerant pipes.
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