1
2
1
2
3
L1
L2
G
G
Earth Screw
terminal block
Connection cord
Earth Screw
Power supply line
3
SPLIT TYPE ROOM AIR CONDITIONER
INSTALLATION MANUAL
(P/N 9332279009-01) ENGLISH
IMPORTANT!
Please Read Before Starting
This air conditioning system meets strict safety and operating standards.
As the installer or service person, it is an important part of your job to
install or service the system so it operates safely and efficiently.
For safe installation and trouble-free operation, you must:
•
Carefully read this instruction booklet before beginning.
•
Follow each installation or repair step exactly as shown.
•
Observe all local, state, and national electrical codes.
•
Pay close attention to all danger, warning, and caution notices given in
this manual.
WARNING:
This symbol refers to a hazard or unsafe practice which
can result in severe personal injury or death.
CAUTION:
This symbol refers to a hazard or unsafe practice which
can result in personal injury and the potential for product
or property damage.
•
Hazel alerting symbols
Electrical
Safety / alert
If Necessary, Get Help
These instructions are all you need for most installation sites and mainte-
nance conditions. If you require help for a special problem, contact our
sales/service outlet or your certified dealer for additional instructions.
In Case of Improper Installation
The manufacturer shall in no way be responsible for improper installation
or maintenance service, including failure to follow the instructions in this
document.
SPECIAL PRECAUTIONS
When Wiring
ELECTRICAL SHOCK CAN CAUSE SEVERE PERSONAL
INJURY OR DEATH. ONLY A QUALIFIED, EXPERIENCED
ELECTRICIAN SHOULD ATTEMPT TO WIRE THIS SYSTEM.
•
Do not supply power to the unit until all wiring and tubing are completed
or reconnected and checked.
•
Highly dangerous electrical voltages are used in this system. Carefully
refer to the wiring diagram and these instructions when wiring. Improper
connections and inadequate grounding can cause
accidental injury
or death
.
•
Ground the unit
following local electrical codes.
•
Connect all wiring tightly. Loose wiring may cause overheating at con-
nection points and a possible fire hazard.
5 cm or over
The basic installation work procedures are the same as conventional refrigerant (R22) models.
However, pay careful attention to the following points:
(1) Since the working pressure is 1.6 times higher than that of conventional refrigerant(R22) mod-
els, some of the piping and installation and service tools are special.(See the table below.)
Especially, when replacing a conventional refrigerant(R22) model with a new refrigerant R410A
model, always replace the conventional piping and flare nuts with the R410A piping and flare nuts.
(2) Models that use refrigerant R410A have a different charging port thread diameter to prevent
erroneous charging with conventional refrigerant(R22) and for safety. Therefore, check
beforehand.[The charging port thread diameter for R410A is 1/2 threads per inch.]
(3) Be more careful that foreign matter (oil, water, etc.) does not enter the piping than with
refrigerant(R22) models. Also, when storing the piping ,securely seal the opening by pinching,
taping, etc.
(4) When charging the refrigerant, take into account the slight change in the composition of the
gas and liquid phases, and always charge from the liquid phase side whose composition is
stable.
This air conditioner uses new refrigerant HFC (R410A).
Fig. 1
●
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 a bend radius of 2 - 3/4’’(70 mm) or
more and install no more than 1- 3/8’’(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. 4
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.
BENDING PIPES
The pipes are shaped by your hands. Be careful not to collapse them.
Do not bend the pipes in an angle more than 90°.
When pipes are repeatedly bent or stretched, the material will harden,
making it difficult to bend or stretch them any more. Do not bend or stretch
the pipes more than three times.
SELECTING THE MOUNTING
POSITION
INSTALLATION DIAGRAM OF
INDOOR AND OUTDOOR UNITS
Decide the mounting position with the customer as follows:
1. INDOOR UNIT
(1) Install the indoor unit level on a strong wall which is not subject
to vibration.
(2) The inlet and outlet ports should not be obstructed : the air should
be able to blow all over the room.
(3) Install the unit near an electric outlet or special branch circuit.
(4) Do not install the unit where it will be exposed to direct sunlight.
(5) Install the unit where connection to the outdoor unit is easy.
(6) Install the unit where the drain pipe can be easily installed.
(7) Take servicing, etc. into consideration and leave the spaces shown
in (Fig. 7). Also install the unit where the filter can be removed.
2. OUTDOOR UNIT
(1) If possible, do not install the unit where it will be exposed to di-
rect sunlight. (If necessary, install a blind that does not interfere
with the air flow.)
(2) Do not install the unit where a strong wind blows or where it is
very dusty.
(3) Do not install the unit where people pass.
(4) Take you neighbors into consideration so that they are not dis-
turbed by air blowing into their windows or by noise.
(5) Provide the space shown in Fig. 7 so that the air flow is not blocked.
Also for efficient operation, leave open three of the four direc-
tions front, rear, and both sides.
WARNING
Install at a place that can withstand the weight of the
indoor and outdoor units and install positively so that
the units will not topple or fall.
CAUTION
(1) Do not install where there is the danger of com-
bustible gas leakage.
(2) Do not install near heat sources.
(3) If children under 10 years old may approach the
unit, take preventive measures so that they can-
not reach the unit.
(4) Install the indoor unit on the wall where the height
from the floors more than 70”(180 cm).
[Indoor unit piping direction]
The piping can be connected in the six directions indicated in (Fig. 6).
When the piping is connected in direction
2
,
3
,
4
or
5
, cut along the
piping groove in the side of the front cover with a hacksaw.
Fig. 7
[INDOOR UNIT]
[OUTDOOR UNIT]
2-2/5”(6 cm) or over
Wall hook bracket
2”(5 cm)
or over
3- 9/16”(9 cm)
or over
60”(150 cm) or over
(Wall cap)
Remote
control unit
Tapping
screw
(small)
Remote
control
unit
holder
4”(10 cm)
or over
24”(60 cm)
or over
8”(20 cm) or over
10”(25 cm)
or over
70” (180 cm)
or over
Connection Cord
14AWG
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 trou-
ble.
Connector cover removal
●
Remove the tapping screw.
Installing the connector cover
(1) After inserting the four hooks, then push upward.
(2) Tighten the tapping screw.
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 2.17ft
•
lbs (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.
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.)
2.
INSTALLING THE WALL HOOK BRACKET
INDOOR UNIT
1.
CUTTING THE HOLE IN THE WALL FOR THE CONNECTING PIPING
3.
FORMING THE DRAIN HOSE AND PIPE
GENERAL
This INSTALLATION MANUAL briefly outlines where
and how to install the air conditioning system. Please
read over the entire set of instructions for the indoor
and outdoor units and make sure all accessory parts
listed are with the system before beginning.
1. TYPE OF COPPER PIPE AND INSULATION MATERIAL
Copper tubing for connectin the outdoor unit to the indoor
unit and insulation material is available for purchase locally.
When you purchase them, please specify the following.
A. Deoxidized annealed copper pipe for refrigerant piping as:
Table 4
Name and Shape
Wall hook bracket
Remote
control
unit
Battery (penlight)
Remote control
unit holder
STANDARD ACCESSORIES
The following installation accessories are supplied. Use them as
required.
Q’ty
1
1
2
1
Name and Shape
Cloth tape
Tapping screw (big)
Tapping screw (small)
Drain pipe
Connection pipe assembly
Connection cord (3-conductor)
Wall pipe
Decorative tape
Vinyl tape
Wall cap
Saddle
Drain hose
Tapping screws
Sealant
Name
Q’ty
1
1
1
1
1
1
1 set
1
1 set
1
ELECTRICAL REQUIREMENT
Always make the air conditioner power supply a special branch cir-
cuit and provide a special switch and receptacle. Do not extend the
power cord.
Always select the size that corresponds to the capacity of the breaker to
the size of the power cord.
The following items are necessary to install this air conditioner. (The
items are not included with the air conditioner and must be purchased
separately.)
CAUTION
9000 BTU/h 12000 BTU/h
MINIMUM CIRCUIT AMPACITY
10 A
12 A
MAXIMUM OVERCURRENT PROTECTION
15 A
15 A
(TIME DELAY FUSE OR HACR TYPE CIRCUIT BREAKER)
Cut each pipe to the appropriate 12” (30 cm)
to16” (40 cm) to dampen vibration between units.
B. Foamed polyethylene insulation for copper pipes as
required to precise length of piping. Wall thickness
of the insulation should not be less than 5/16” (8 mm).
C. Use insulated copper wire for field wiring.
CAUTION
Check local electrical codes and regulations
before obtaining wire. Also, check any specified
instructions or limitations.
ELECTRICAL WIRING (OUTDOOR UNIT)
1. Remove the screws, then remove the control box cover.
2. Fasten the Inter unit wire harness and power supply to the conduit holder using the lock nut.
3. Connect inter-unit wire harness and power supply to the terminal.
Refer to the wiring diagram
4. Use the screws to install the control box cover.
WARNING
Be sure to comply with local codes while run-
ning the wire from the indoor unit to the out-
door unit (size of wire and wiring method, etc.).
Every wire must be connected firmly.
No wire should be allowed to touch refrigerant
tubing, the compressor or any moving part.
Loose wiring may cause the terminal to over-
heat or result in unit malfunction. A fire hazard
may also exist. Therefore, be sure all wiring is
tightly connected.
Connect wires to the matching numbers of
terminals.
NOTE:
•
Connector trade size for this unit is 1/2” (12.7 mm). The connec-
tor can be bought at a hardware store. Refer to
“
How to connect
wiring to the terminals
”
for instructions on connecting depend-
ing on the wire type you are using.
•
The fuse located in the outdoor unit provides power supply pro-
tection and may blow when power is applied if the system has
been incorrectly wired.
G
G
11
G
G
33
22
11
22
33
208/230V
208/230V
208/230V
208/230V
208/230V
208/230V
L2
L2
L1
L1
Indoor unit
Terminal
Grounding line
Control line
(Inter Unit)
Power line
DISCONNECT
SWITCH
(FIELD SUPPLY)
Outdoor unit
Terminal
PO
WER SUPPL
Y
Single-phase, 208/230V
Earth Screw
Lock nut
Control box cover
Inter-unit wire harness
Power supply
Inter-unit wire harness
2. ADDITIONAL MATERIALS REQUIRED FOR INSTALLATION
A. Refrigeration (armored) tape
B. Insulated staples or clamps for connecting wire
(See your local electrical codes.)
C. Putty
D. Refrigeration lubricant
E. Clamps or saddles to secure refrigerant piping
3. OPERATING RANGE
Table 5
Fig. 11
When Transporting
Be careful when picking up and moving the indoor and outdoor units.
Get a partner to help, and bend your knees when lifting to reduce strain
on your back. Sharp edges or thin aluminum fins on the air conditioner
can cut your fingers.
When Installing...
...In a Ceiling or Wall
Make sure the ceiling/wall is strong enough to hold the unit’s weight. It
may be necessary to construct a strong wood or metal frame to provide
added support.
...In a Room
Properly insulate any tubing run inside a room to prevent “sweating” that
can cause dripping and water damage to walls and floors.
...In Moist or Uneven Locations
Use a raised concrete pad or concrete blocks to provide a solid, level
foundation for the outdoor unit. This prevents water damage and abnor-
mal vibration.
...In an Area with High Winds
Securely anchor the outdoor unit down with bolts and a metal frame.
Provide a suitable air baffle.
...In a Snowy Area (for Heat Pump-type Systems)
Install the outdoor unit on a raised platform that is higher than drifting
snow. Provide snow vents.
When Connecting Refrigerant Tubing
•
Keep all tubing runs as short as possible.
•
Use the flare method for connecting tubing.
•
Apply refrigerant lubricant to the matching surfaces of the flare and
union tubes before connecting them, then tighten the nut with a torque
wrench for a leak-free connection.
•
Check carefully for leaks before starting the test run.
NOTE:
Depending on the system type, liquid and gas lines may be either nar-
row or wide. Therefore, to avoid confusion the refrigerant tubing for your
particular model is specified as either “small” or “large” rather than as
“liquid” or “gas”.
When Servicing
•
Turn the power OFF at the main circuit breaker panel before opening
the unit to check or repair electrical parts and wiring.
•
Keep your fingers and clothing away from any moving parts.
•
Clean up the site after you finish, remembering to check that no metal
scraps or bits of wiring have been left inside the unit being serviced.
•
After installation, explain correct operation to the customer, using the
operating manual.
2”(5 cm) or over
ADDITIONAL CHARGE
Refrigerant suitable for a piping length of 49 ft (15 m) is charged in
the outdoor unit at the factory.
When the piping is longer than 49 ft (15 m), additional charging is necessary.
For the additional amount, see the table below.
Between 49 ft (15 m) and 66 ft (20 m), when using a connection pipe
other than that in the table, charge additional refrigerant with 0.2 oz/
ft (20g/1 m) as the criteria.
Pipe length
Additional
refrigerant
49 ft (15 m)
None
Table 6
66 ft (20 m)
3.5 oz (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 66 ft (20 m).
If the units are further apart than this, correct
operation can not be guaranteed.
Heating Mode
About 5 to 75 °F
86 °F or less
Outdoor temperature
Indoor temperature
Indoor humidity
Cooling/Dry Mode
About 14 to 115 °F
About 64 to 90 °F
About 80% or less
Small pipe
Large pipe
Outer diameter
Thickness
Outer diameter
Thickness
1/4”(6.35 mm)
1/32”(0.8 mm)
3/8”(9.52 mm)
1/32”(0.8 mm)
Fig. 8
Fig. 6
(Rear)
1
Rear outlet
2
Right
outlet
3
Bottom outlet
4
Left bottom
outlet
5
Left
outlet
(1) Install the wall hook bracket so that it is correctly positioned hori-
zontally and vertically. If the wall hook bracket is titled, water will
drip to the floor.
(2) Install the wall hook bracket so that it is strong enough to with-
stand the weight of an adult.
●
Fasten the wall hook bracket to the wall with 6 or more screws
through the holes near the outer edge of the bracket.
●
Check that there is no rattle at the wall hook bracket.
Fig. 2
[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. 3)
●
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. 3
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
toward the inside, so that the
drain fixture (white) can accu-
rately align with the screw hole
around the drain cock.
After inserting and before re-
placing, please reinstall and fix
the removed screws.
●
Be sure to install around the drain hose connector.
●
As the screw is inside, be sure to use screwdriver treated with magnet.
Screw
Drain hose
Drain fixture
(white)
Screw hole
Drain hose
Screw
Drain cock
Drain fixture (white)
CAUTION
(1)
In order to align the drain hose and drain cap, be
sure to insert securely and vertically. Incline in-
sertion will cause water leakage.
(2)
When inserting, be sure not to attach any mate-
rial 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 bot-
tom 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
temperature under 32 °F), 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.
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.
Fig. 9
Tapping screw
Rear hook
Connector cover
Always use the screws as shown above.
Do not select the top and bottom screws incorrectly.
LO
HI
Flare nut
3-way valve
-0.1 MPa
(-76 cmHg
-1 bar)
High
pressure
side valve
(closed)
2-way valve
Gauge manifold
Compound pressure gauge
Pressure gauge
Low pressure
side valve
Blank cap
Charge
hose
Vacuum pump
Valve stem
Charge hose
Charging port cap
Charging port
Fig. 10
CAUTION
(1) Refrigerant must not be discharged into atmos-
phere.
(2) After connecting the piping , check the joints for
gas leakage with gas leak detector.
(3) When adding refrigerant, add the refrigerant from
the charging port at the completion of work.
(4) The maximum length of the piping is 66 ft (20 m).
If the units are further apart than this, correct
operation can not be guaranteed.
Special tools for R410A
Contents of change
Pressure is high and cannot be measured with a conventional gauge. To prevent erroneous
mixing of other refrigerants, the diameter of each port has been changed.
It is recommended the gauge with seals-0.1 to 5.3 MPa (-1 to 53 bar) for high pressure.
-0.1 to 3.8 MPa (-1 to 38 bar) for low pressure.
To increase pressure resistance, the hose material and base size were changed.
A conventional vacuum pump can be used by installing a vacuum pump adapter.
Special gas leakage detector for HFC refrigerant R410A.
Tool name
Gauge manifold
Charge hose
Vacuum pump
Gas leakage detector
Copper pipes
It is necessary to use seamless copper pipes and it is desirable
that the amount of residual oil is less than 40 mg/10m. Do not
use copper pipes having a collapsed, deformed or discolored
portion (especially on the interior surface). Otherwise, the ex-
pansion value or capillary tube may become blocked with con-
taminants.
As an air conditioner using R410A incurs pressure higher than
when using R22, it is necessary to choose adequate materials.
Thicknesses of copper pipes used with R410A are as shown in Table1.Never use copper pipes thinner than 0.8mm even
when it is available on the market.
Table 1 Thicknesses of Annealed Copper Pipes
Thickness (mm)
Nominal
diameter
1/4
3/8
Outer diameter
(mm)
6.35
9.52
R410A
0.80
0.80
[ref.] R22
0.80
0.80
(1) Do not use the existing (for R22) piping and flare nuts.
• If the existing materials are used, the pressure inside the refrigerant cycle will rise and cause breakage, injury,
etc.(Use the special R410A materials.)
(2) When installing and relocating the air conditioner, do not mix gases other than the specified refrigerant(R410A)
to enter the refrigerant cycle.
• If air or other gas enters the refrigerant cycle, the pressure inside the cycle will rise to an abnormally high value
and cause breakage, injury, etc.
WARNING
CAUTION
When installing pipes shorter than 10ft (3m), sound of the outdoor unit will be transferred to the indoor unit, which
will cause large operating sound or some abnormal sound.
4
Left rear outlet
Drain hose
Outdoor unit bottom
CAUTION
(2)
(1)
In the area with heavy snowfall, if the intake and outlet of outdoor unit
is blocked with snow, it might become difficult to get warm and it is
likely to cause of the breakdown. Please construct a canopy and a ped-
estal or place the unit on a high stand (local configured).
When the outdoor temperature is 32
°
F (0
°
C)
or less, do not use the
accessor y drain pipe and drain cap. If the drain pipe and drain cap are
used, the drain water in the pipe may freeze in extremety cold weather.
(Reverse cycle model only)
4”(10 cm) or over
18” (45.4 cm)
12-9/16” (32 cm)
• Do not directly install it
on the ground, otherwise
it will cause failure.
• To obtain better operation
efficiency, when the outdoor
unit is installed, be sure to
open the front and left side.
(1) Cut a 2-9/16” (65 mm) diameter hole in the wall at the position shown
in (Fig. 1).
(2) When cutting the wall hole at the inside of the installation frame, cut
the hole within the range of the left and right center marks of the
installation frame.
When cutting the wall hole at the outside of the installation frame,
cut the hole at least 3/8” (10 mm) lower.
(3) Cut the hole so that the outside end is lower (3/16” to 3/8” (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. 1)
Wall hook bracket
Tapping screw
Right piping
Bind with vinyl tape
Indoor unit drain hose (bottom)
Pipe (top)
Rear piping
Bottom
piping
Drain cap
Indoor unit
drain hose
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.
Fasten with
vinyl tape
(Wall cap)
(Wall pipe)
(Inside)
Wall
(Outside)
3/16’’ to 3/8’’
(5 to 10 mm)
low
Installation method of Drain cap
●
Use a hexagonal wrench (3/16” (4 mm)
at opposite side) to insert the drain cap,
till the drain cap contacts the tip of drain
cock.
No gap
Hexagonal
wrench
Drain cock
Drain cap
WARNING
If the wall pipe is not used, the cord interconnecting
the indoor and outdoor units may touch metal and
cause electric leakage.
CAUTION
Install the wall hook bracket horizontally and perpen-
dicularly.
Center mark
at least 3/8” (10 mm)
lower
Center mark
2-9/16” (65 mm) dia. hole
2-9/16” (65 mm) dia.
hole
at least 3/8” (10 mm)
lower
Table 7
Tightening torque
Blank cap
14.47 to 18.08 ft
•
lbs (200 to 250 kgf
•
cm)
Charging port cap
9.04 to 11.57 ft
•
lbs (125 to 160 kgf
•
cm)
Top hooks
Indoor unit
Bottom hooks
Wall hook bracket
Connection pipe
(1/4” (6.35 mm)
dia.)
Connection pipe
(3/8” (9.52 mm) dia.)
Align the marks.
Bend (R70) with
a pipe bender
Indoor unit
Wall hook bracket
(Spacer)
CONNECTION
(1) Install the outdoor unit wall cap (supplied with the optional installa-
tion 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 nec-
essary 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 respectively) onto the pipe and
perform the flare processing with a
flare tool.
Use the special R410A flare tool, or
the conventional (for R22) flare tool.
When using the conventional flare tool,
always use an allowance adjustment
gauge and secure the A dimension
shown in table 3 .
CONNECTING THE PIPING
Check if [L] is flared uniformly
and is not cracked or scratched.
Table 2
Flare nut tightening torque
Table 3
Pipe outside diameter
Flare nut
1/4” (6.35 mm) dia.
3/8” (9.52 mm) dia.
Tightening torque
11.57 to 13.20 ft
•
lbs
(160 to 180 kgf
•
cm)
21.70 to 30.38 ft
•
lbs
(300 to 420 kgf
•
cm)
A (in)
Pipe outside
diameter
1/4” (6.35 mm)
3/8” (9.52 mm)
Flare tool for
R410A, clutch type
0 to 1/32
0 to 1/32
Conventional (R22) flare tool
Clutch type
1/32 to 2/32
1/32 to 2/32
Wing nut type
2/32 to 3/32
2/32 to 3/32
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 attached 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.
Fig. 5
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.
Q’ty
1
8
2
1
Die
A
Pipe
OK
NO
Extend the pipe
by unwinding it.
