INDOOR UNIT
CUTTING THE HOLE IN THE WALL FOR THE CONNECTING PIPING
(1) Cut a 65 mm diameter hole in the wall at the position shown in
(Fig. 5).
(2) When cutting the wall hole at the inside of the wall hook bracket, cut
the hole within the range of the left and right center marks 40 mm
below the wall hook bracket.
When cutting the wall hole at the outside of the wall hook bracket, cut
the hole at least 10 mm below over.
(3) Cut the hole so that the outside end is lower (5 to 10 mm) than the
inside end.
(4) Always align the center of the wall hole. If misaligned, water leakage
will occur.
(5) Cut the wall pipe to match the wall thickness, stick it into the wall cap,
fasten the cap with vinyl tape, and stick the pipe through the hole.
(The connection pipe is supplied in the installation set.) (Fig. 5)
(6) For left piping and right piping, cut the hole a little lower so that drain
water will flow freely. (Fig. 5)
INSTALLING THE WALL HOOK BRACKET
(1) Install the wall hook bracket so that it is correctly positioned horizon-
tally and vertically. If the wall hook bracket is tiled, water will drip to
the floor.
(2) Install the wall hook bracket so that it is strong enough to withstand
the weight of an adult.
●
Fasten the wall hook bracket to the wall with 8 or more screws through
the holes near the outer edge of the bracket.
●
Check that there is no rattle at the wall hook bracket.
FORMING THE DRAIN HOSE AND PIPE
WARNING
If the wall pipe is not used, the cord interconnecting
the indoor and outdoor units may touch metal and
cause electric leakage.
[Rear piping, Right piping, Bottom piping]
●
Install the indoor unit piping in the direction of the wall hole and bind
the drain hose and pipe together with vinyl tape. (Fig. 7)
●
Install the piping so that the drain hose is at the bottom.
●
Wrap the pipes of the indoor unit that are visible from the outside
with decorative tape.
[For Left rear piping, Left piping]
Interchange the drain cap and the drain hose.
Fig. 5
Fig. 6
Fig. 7
Right outlet
Piping (on top)
Drain hose (on bottom)
Rear outlet
Bind with vinyl tape
Drain cap
Drain hose
Bottom outlet
Remove the drain
cap by pulling at
the projection at
the end of the cap
with pliers, etc.
For left outlet
piping, cut off the
piping outlet
cutting groove
with a hacksaw.
CAUTION
Install the wall hook bracket horizontally and perpen-
dicularly.
Wall hook bracket
Leveling method
Hang weight
from here.
Tapping screw
(size: large; quantity: 8)
Wall hook
bracket
String
Weight
Lower
Centering marks
Fasten with
vinyl tape
(Wall cap)
(Wall pipe)
(Inside)
Wall
(Outside)
Lower
65 mm hole
65 mm hole
Wall hook bracket
10 mm or
over
5~10 mm
CAUTION
(1)
In order to align the drain hose and drain cap, be
sure to insert securely and vertically. Incline inser-
tion will cause water leakage.
(2)
When inserting, be sure not to attach any material
besides water. If any other material is attached, it
will cause deterioration and water leakage.
(3)
After removing drain hose, be sure not to forget
mounting drain cap.
(4)
Be sure to fix the drain hose with tape to the bottom
of piping.
(5)
Prevent drain water frozen under low tempera-
ture environment.
When installing indoor unit's drain hose outdoors, necessary
measure for frost protection should be taken to prevent drain
water frozen.
• Under low temperature environment (when outdoor tempera-
ture under 0 °C), after cooling operation is executed, water
in the drain hose could be frozen.
Once drain water is frozen, the drain hose will be blocked
and water leakage may be resulted for indoor unit.
1. Check if the piping connections are secure.
2. Check that the stems of 2-way valve and 3-way valve are closed fully.
3. Connect the gauge manifold charge hose to the charging port of the
3-way valve (side with the projection for pushing in the valve core).
4. Open the low pressure side valve of the gauge manifold fully.
5. Operate the vacuum pump and start pump down.
6. Slowly loosen the flare nut of the 3-way valve and check if air
enters, then retighten the flare nut.
(When the flare nut is loosened the operating sound of the
vacuum pump changes and the reading of the compound
pressure gauge goes from minus to zero.)
OUTDOOR UNIT
OUTDOOR UNIT INSTALLATION
AIR PURGE
Always use a vacuum pump to purge the air.
Refrigerant for purging the air is not charged in the outdoor unit at the factory.
Close the high pressure side valve of the gauge manifold fully and do not operate it during the following work.
●
Set the unit on a strong stand, such as one made of concrete blocks
to minimize shock and vibration.
●
Do not set the unit directly on the ground because it will cause trouble.
Connector cover removal
●
Remove the tapping screws.
7. Pump down the system for at least 15 minutes, then check if the
compound pressure gauge reads -0.1 MPa (-76 cmHg, -1 bar).
8. At the end of pump down, close the low pressure side gauge of
the gauge manifold fully and stop the vacuum pump.
9. Slowly loosen the valve stem of the 3-way valve. When the
compound pressure gauge reading reaches 0.1-0.2 MPa,
retighten the valve stem and disconnect the charge hose from
the 3-way valve charging port.
(If the stem of the 3-way valve is opened fully before the
charge hose is disconnected, it may be difficult to disconnect
the charge hose.)
10. Fully open the valve stems of the 2-way valve and 3-way valve
using a hexagon wrench. (After the valve stem begins to turn,
turn it with a torque of less than 2.9 N•m (30 kgf•cm) until it
stops turning.)
11. Firmly tighten the 2-way valve and 3-way valve blank cap and
the charging port cap.
Fig. 11
Table 4
Tightening torque
Blank cap (2-way valve)
19.6 to 24.5 N•m (200 to 250 kgf•cm)
Blank cap (3-way valve)
27.4 to 31.4 N•m (280 to 320 kgf•cm)
Charging port cap
12.3 to 15.7 N•m (125 to 160 kgf•cm)
CAUTION
During installation, make sure that the refrigerant
pipe is attached firmly before you run the compres-
sor. Do not operate the compressor under the condi-
tion of refrigerant piping not attached properly with
2-way or 3-way valve open. This may cause abnor-
mal pressure in the refrigeration cycle that leads to
breakage and even injury.
LO
HI
Fig. 12
Flare nut
3-way valve
-0.1 MPa
(-76 cmHg
-1 bar)
High
pressure
side valve
(closed)
Low pressure
side valve
Blank cap
Charge hose
Vacuum pump
2-way valve
Valve stem
Charge
hose
Charging port cap
Charging port
Gauge manifold
Compound pressure gauge
Pressure gauge
WARNING
(1) Install the unit where it will not be tilted by more
than 5°.
(2) When installing the outdoor unit where it may ex-
posed to strong wind, fasten it securely.
CAUTION
(1)
Refrigerant must not be discharged into atmosphere.
(2)
After connecting the piping , check the joints for
gas leakage with gas leak detector.
Tapping screw
Rear hooks
Connector cover
Front hooks
Installing the connector cover
(1) After inserting the two front hooks, then insert the rear hook.
(2) Tighten the tapping screws.
●
For left piping and left rear piping, align the marks on the wall hook
bracket and shape the connection pipe.
●
Bend the connection piping at the bend radius of 70 mm or more and
install no more than 35 mm from the wall.
●
After passing the indoor piping and drain hose through the wall hole,
hang the indoor unit on the hooks at the top and bottom of the wall
hook bracket.
[Installing the indoor unit]
●
Hang the indoor unit from the hooks at the top of the wall hook bracket.
●
Insert the spacer, etc. between the indoor unit and the wall hook
bracket and separate the bottom of the indoor unit from the wall.
Fig. 8
CONNECTING THE PIPING
CONNECTION
(1) Install the outdoor unit wall cap (supplied with the optional installation set
or procured at the site) to the wall pipe.
(2) Connect the outdoor unit and indoor unit piping.
(3) After matching the center of the flare surface and tightening the nut hand tight,
tighten the nut to the specified tightening torque with a torque wrench.(Table 2)
FLARING
(1) Cut the connection pipe to the necessary
length with a pipe cutter.
(2) Hold the pipe downward so that cuttings
will not enter the pipe and remove the burrs.
(3) Insert the flare nut onto the pipe and flare
the pipe with a flaring tool.
Insert the flare nut (always use the flare nut
attached to the indoor and outdoor units re-
spectively) onto the pipe and perform the flare
processing with a flare tool.
Use the special R410A flare tool, or the conv-
entional (for R22) flare tool.
When using the conventional flare tool, always
use an allowance adjustment gauge and se-
cure the A dimension shown in table 3.
Check if [L] is flared uniformly
and is not cracked or scratched.
Table 2
Flare nut tightening torque
Fig. 9
Flare nut
6.35 mm dia.
12.7 mm dia.
Tightening torque
15.7 to 17.6 N•m
(160 to 180 kgf•cm)
49.0 to 53.9 N•m
(500 to 550 kgf•cm)
Tightening torque standard
(using a 20 cm wrench)
Wrist strength
Arm strength
A (mm)
Table 3
Pipe outside diameter
Pipe outside
diameter
ø 6.35 mm (1/4”)
ø 12.7 mm (1/2”)
Flash tool for
R410A, clutch type
0 to 0.5
0 to 0.5
Conventional (R22) flare tool
Clutch type
1.0 to 1.5
1.0 to 1.5
Wing nut type
1.5 to 2.0
1.5 to 2.0
After hooking the indoor unit to the top hook, hook the fittings of the indoor unit
to the two bottom hooks while lowering the unit and pushing it against the wall.
Upper hooks
(Lower projections)
Lower slots
Indoor unit
Connection piping
Small piping
Wall hook bracket
Alignment marks
Large piping
Indoor unit
Wall hook bracket
(Spacer)
Tighten with
two wrenches.
Torque wrench
Wrench (fixed)
Flare nut
Indoor unit pipe
Connection pipe
To prevent gas leakage, coat the flare
surface with refrigerator oil.
9314963018-02
(1) Open the open panel.
(2) Remove the top cover.
(3) Remove the cord clamp.
(4) Route the connection cord from behind the indoor unit.
(1) Match the terminal block numbers and connection
cord colors with those of the outdoor unit.
Erroneous wiring may cause burning of the elec-
tric parts.
(2)
Connect the connection cords firmly to the terminal
block. Imperfect installation may cause a fire.
(3) Always fasten the outside covering of the connec-
tion cord with the cord clamp. (If the insulator is
chafed, electric leakage may occur.)
(4) Securely earth the power cord plug.
(5)
Do not use the earth screw for an external connec-
tor. Only use for interconnection between two units.
Fig. 10
Top cover
CAUTION
(5) Connect the end of the connection cord securely to the terminal block.
(6) Secure the connection cord with the cord clamp.
(7) Install the top cover with the screw.
(8) Close the open panel.
INDOOR UNIT WIRING
Cord clamp
Open panel
Connection
cord
Connec-
tion cord
Screw
Cord clamp
Screw
Screw
Open panel
CAUTION
(1) Fasten a flare nut with a torque wrench as instructed in this
manual. If fastened too tight, the flare nut may be broken after
a long period of time and cause a leakage of refrigerant.
(2) During installation, make sure that the refrigerant pipe is at-
tached firmly before you run the compressor. Do not operate
the compressor under the condition of refrigerant piping not
attached properly with 2-way or 3-way valve open. This may
cause abnormal pressure in the refrigeration cycle that leads to
breakage and even injury.
40 m
m
12 m
m
35 m
m
12 m
m
5 m
m
5 m
m
FINISHING
(1) Insulate between pipes.
●
For rear, right, and bottom piping, overlap the connection pipe heat insula-
tion and indoor unit pipe heat insulation and bind them with vinyl tape so
that there is no gap.
●
For left and left rear piping, butt the connection pipe heat insulation and
indoor unit pipe heat insulation together and bind them with and vinyl tape
so that there is no gap.
●
For left and left rear piping, wrap the area which accommodates the rear
piping housing section with cloth tape.
●
For left and left rear piping, bind the connection cord to the top of the pipe
with vinyl tape.
●
For left and left rear piping, bundle the piping and drain hose together by
wrapping them with cloth tape over the range within which they fit into the
rear piping housing section.
(2) Temporarily fasten the connection cord along the connection pipe with vi-
nyl tape. (Wrap to about 1/3 the width of the tape from the bottom of the
pipe so that water does not enter.)
(3) Fasten the connection pipe to the outside wall with saddles, etc.
(4) Fill the gap between the outside wall pipe hole and the pipe with sealer so
that rain water and wind cannot blow in.
(5) Fasten the drain hose to the outside wall, etc.
Fig. 15
Fig. 16
Left piping
Connec-
tion cord
Drain hose
Connection piping
For connection from the left rear
(Wall pipe)
Connection
cord
Connection
piping
Drain hose
Holder
Drain hose
(Included with the piping
set sold separately or
obtained locally)
Lifted up
Bent
Immersed in water
BAD
BAD
BAD
(Saddle)
(Outside wall cap)
(Sealer putty)
(Outdoors)
Wall
Pipe
Pipe
Drain hose
Cloth tape
Wrap with cloth tape
Overlap the insulation
Butt connection pipe
(heat insulation) against
the indoor unit pipe
(heat insulation) and
wrap with seal A so that
there is no gap.
Connection pipe
(heat insulation)
Vinyl tape
Indoor unit pipe
(heat insullation)
Seal A
●
Be sure to install around the drain hose connector.
●
As the screw is inside, be sure to use screwdriver treated with
magnet.
Removal method of
drain hose
●
Remove the screw at the left
of drain hose and pull out
drain hose.
Installation method of
drain hose
●
Vertically insert the drain hose
till the drain furniture aligns
with the screw hole of drain
cock. After inserting and be-
fore replacing, please reinstall
and fix the removed screws.
Screw
Drain furniture
Drain hose
Drain cock
Drain furniture
Drain hose
Screw hole
Screw
TEST RUNNING
1. INDOOR UNIT
(1) Is operation of each button on the remote control unit normal?
(2) Does each lamp light normally?
(3) Do the air flow-direction louver operate normally?
(4) Is the drain normal?
2. OUTDOOR UNIT
(1) Is there any abnormal noise and vibration during operation?
(2) Will noise, wind, or drain water from the unit disturb the
neighbors?
(3) Is there any gas leakage?
Test run button
Fig. 17
Die
A
Pipe
●
Perform test operation and check items 1 and 2 below.
●
For the test operation method, refer to the operating manual.
●
The outdoor unit, may not operate, depending on the room temperature. In
this case, press the test run button on the remote control unit while the air
conditioner is running, (Point the transmitter section of the remote control
unit toward the air conditioner and press the test run button with the tip of a
ball-point pen, etc.)
●
To end test operation, press the remote control unit START/STOP button.
(When the air conditioner is run by pressing the test run button, the OPERA-
TION indicator lamp and TIMER indicator lamp will simultaneously flash slowly.)
Connection cord wiring
Run the connection cord to the rear of the outdoor unit within the
A
range of the arrows shown in the figure.
(The connector cover becomes difficult to install.)
25mm
12mm
5mm
5mm
12mm
30mm
Earth screw
Sheath
Cord clamp
(1) Match the terminal block numbers and connection
cord colors with those of the indoor unit.
Erroneous wiring may cause burning of the elec-
tric parts.
(2)
Connect the connection cords firmly to the terminal
block. Imperfect installation may cause a fire.
(3) Always fasten the outside covering of the connec-
tion cord with the cord clamp. (If the insulator is
chafed, electric leakage may occur.)
(4) Securely earth the power cord plug.
(5)
Do not use the earth screw for an external connec-
tor. Only use for interconnection between two units.
CAUTION
Fig. 14
Connection cord
OUTDOOR UNIT WIRING
(1) Remove the outdoor unit connector cover.
(2) Bend the end of the cord as shown in the figure.
(3) Connect the end of the connection cord fully into the terminal block.
(4) Fasten the sheath with a cord clamp.
(5) Install the connector cover.
Connection cord
Cord clamp
Control box
Outdoor unit terminal block
Indoor unit terminal block
Connection cord
Earth screw
Earth screw
Fig. 13
Additional charge
Refrigerant suitable for a piping length of 15 m is charged in the outdoor
unit at the factory.
When the piping is longer than 15 m, additional charging is necessary.
For the additional amount, see the table below.
Table 5
Between 15 m and 20 m, when using a connection pipe other than that
in the table, charge additional refrigerant with 20g/1 m as the criteria.
Pipe length
Additional refrigerant
15 m
None
20 m
100 g
CAUTION
(1)
When adding refrigerant, add the refrigerant from the
charging port at the completion of work.
(2)
The maximum length of the piping is 20 m. If the
units are further apart than this, correct operation
can not be guaranteed.
05L314_9314963018-02
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