Friedrich Metal Products M24CG Installation Manual

12 34

SPLIT TYPE ROOM AIR CONDITIONER

INSTALLATION MANUAL

(PART NO. 9315342935-01) 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 effi ciently.

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 main­tenance conditions. If you require help for a special problem, contact our
sales/service outlet or your certifi ed 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 fi re 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) models,

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 fl are nuts with the R410A piping and fl are
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).

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 fi ns on the air conditioner
can cut your fi ngers.

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 fl oors.

...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 abnor­mal vibration.

...In an Area with High Winds

Securely anchor the outdoor unit down with bolts and a metal frame.
Provide a suitable air baffl e.

...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 fl are method for connecting tubing.

• Apply refrigerant lubricant to the matching surfaces of the fl are 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 nar­row or wide. Therefore, to avoid confusion the refrigerant tubing for your
particular model is specifi ed 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 fi ngers and clothing away from any moving parts.

• Clean up the site after you fi nish, 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.

(1) Do not use the existing (for R22) piping and fl are 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 specifi ed 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 10 ft (3m), sound of the outdoor unit will be transferred to the indoor unit, which
will cause large operating sound or some abnormal sound.

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
expansion value or capillary tube may become blocked with
contaminants.
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 the table. Never use copper pipes thinner than that in the
table even when it is available on the market.

CONNECTION PIPE REQUIREMENT

Nominal

diameter

1/4in

5/8in

Outer

diameter

6.35mm

15.88mm

Thickness

0.8mm

1.0mm

Maximum height

(between indoor and

outdoor)

20m(66ft)

Maximum

length

30m(99ft)

INDOOR UNIT

CUTTING THE HOLE IN THE WALL FOR THE CONNECTING PIPING

(1) Cut a 3-1/8”(80 mm) diameter hole in the wall at the position shown in

the fi gure.

(2) When cutting the wall hole at the inside of the wall hook bracket, cut

the hole to a point of intersection of center marks.

When cutting the wall hole at the outside of the wall hook bracket, cut

the hole at a point of 10mm below.

(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.)

(6) For left piping and right piping, cut the hole a little lower so that drain

water will fl ow freely.

Lower

Centering marks

Lower

3-1/8”(80 mm)
hole

Wall hook bracket

Fasten with
vinyl tape

(Wall cap)

(Wall pipe)

(Inside) Wall (Outside)

3/16” to 3/8”(5 to 10 mm)

3-1/8”(80 mm)
hole

3/8” (10 mm)
or over

INSTALLING THE WALL HOOK BRACKET

(1) Install the wall hook bracket so that it is correctly positioned horizontally

and vertically. If the wall hook bracket is tiled, water will drip to the
fl oor.

(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 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.

WARNING

If the wall pipe is not used, the cord interconnecting the
indoor and outdoor units may touch metal and cause
electric leakage.

Wall hook bracket

Leveling method

Hang weight

from here.

Tapping screw
(size: large; quantity: 8)

Wall hook
bracket

String

Weight

CAUTION

Install the wall hook bracket horizontally and perpen­dicularly.

FORMING THE DRAIN HOSE AND PIPE

[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.

● 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.

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.

Right piping

Bind with vinyl tape

Indoor unit drain hose
(bottom)

Pipe (top)
Rear piping

Bottom

piping

Insulation (Drain hose)

Drain hose

CAUTION

Insert the drain hose and drain cap into the drain port, mak­ing sure that it comes in contact with the back of the drain
port, and then mount it. If the drain hose is not connected
properly, leaking will occur.

• Attach the Insulation (Drain hose) to the drain hose.

● 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 4”(100 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.

Indoor unit

Wall hook bracket

(Spacer)

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 fl are surface and tightening

the nut hand tight, tighten the nut to the specifi ed tightening

torque with a torque wrench.

FLARING

(1) Cut the connection pipe to the

necessary length with a pipe cut-

ter.
(2) Hold the pipe downward so that

cuttings will not enter the pipe

and remove the burrs.
(3) Insert the fl are nut onto the pipe

and fl are the pipe with a fl aring

tool.
Insert the fl are nut (always use the

fl are nut attached to the indoor and
outdoor units respectively) onto the
pipe and perform the fl are process­ing with a fl are tool.
Use the special R410A fl are tool,
or the conventional (for R22) fl are
tool.
When using the conventional fl are
tool, always use an allowance ad­justment gauge and secure the A

dimension shown in the table.

BENDING PIPES

(1) When bending the pipe, be careful not to crush it.
(2) To prevent breaking of the pipe, avoid sharp bends.
Bend the pipe with a radius of curvature of 6” (150 mm) or

over.
(3)

If the copper pipe is bend the pipe or pulled to often, it will be-

come stiff.

Do not bend the pipes more than three times at one place.

Tighten with two wrenches.

Torque
wrench

Wrench (fi xed)

Flare nut

Indoor unit pipe

Connection pipe

To prevent gas leakage, coat the fl are
surface with refrigerator oil.

CAUTION

(1) Fasten a fl are nut with a torque wrench as instructed in this manual. If

fastened too tight, the fl are 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 fi rmly

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.

A (mm)

Pipe outside diameter

Pipe outside

diameter

ø 6.35 mm (1/4”)

ø 15.88 mm (5/8”)

Flash tool for

R410A, clutch type

0 to 0.5
0 to 0.5

Conventional (R22) fl are 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

Flare nut tightening torque and L dimension

Flare nut

1/4” (6.35 mm) dia.

5/8” (15.88 mm) dia.

Tightening torque

11.8 to 13.3 ft

•

lbs

(160 to 180 kgf

•

cm)

46.5 to 55.3 ft

•

lbs

(630 to 750 kgf

•

cm)

L dimension

1.4 to 1.7mm

2.2 to 2.4mm

A

Check if [L] is fl ared uniformly
and is not cracked or scratched.

Die

Pipe

ELECTRICAL WIRING (INDOOR UNIT)

HOW TO THE INSTALL THE INTER-UNIT WIRE HARNESS

1. Remove the screws, then remove the conduit holder.

2. Fasten the inter-unit wire harness to the conduit holder using the lock nut.
IMPORTANT: Refer to fi gure of inlet-unit wire length about the length of
inter-unit wire harness.

3. Use the screws to install the conduit holder with which Inter-unit wire har­ness is included.

4. Remove the screws, then remove the cord clamp.

5. Connect inter-unit wire harness to the terminal.
Refer to the wiring diagram.

6. Use the screws to install the cord clamp.

The method of adjusting inter-unit wire harness

To connect inter-unit wire harness to the terminal correctly, please
refer to the fi gure to adjust the length of the part of Inter-unit Wire
harness ahead from conduit holder.

GENERAL

This INSTALLATION MANUAL briefl y 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 connection 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:

STANDARD ACCESSORIES

The following installation accessories are supplied. Use them as
required.

ELECTRICAL REQUIREMENT

Always make the air conditioner power supply a special branch cir­cuit and provide a special switch and receptacle. Do not extend 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.)

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 99 ft (30 m), when using a connection pipe
other than that in the table, charge additional refrigerant with 0.21 oz/
ft (20g/1 m) as the criteria.

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

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 99 ft (30

m). If the units are further apart than this, correct
operation can not be guaranteed.

Name and Shape Q’ty Name and Shape Q’ty

Wall hook bracket

Remote
control
unit

Battery

Tapping screw (big)

Cloth tape

1

1

2

Remote control
unit holder

1

1

8

2

Tapping screw (small)

Insulation (Drain hose)

1

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 the fi gure. Also install the unit where the fi lter can be

removed.

2. OUTDOOR UNIT

(1) If possible, do not install the unit where it will be exposed to direct

sunlight. (If necessary, install a blind that does not interfere with

the air fl ow.)
(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 your 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 the fi gure so that the air fl ow is not blocked.
Also for effi cient operation, leave open three of the four directions

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 combus-

tible 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 cannot
reach the unit.

(4) Install the indoor unit on the wall where the height

from the fl oors more than 240 cm.

[INDOOR UNIT]

[Indoor unit piping direction]

The piping can be connected in the 7 directions in the fi gure. When
the piping is connected in direction 2, 3, 4 or 5, cut along the pip-

ing groove in the side of the front panel with a hacksaw.

1 Rear
outlet

2 Right

outlet

3 Bottom outlet

4 Left bottom

outlet

5 Left

outlet

(Rear)

6 Center
outlet

Remote

control unit

[OUTDOOR UNIT]

4”(10 cm) or over

24”(60 cm) or over

4”(10 cm) or over

12”(30 cm) or over

12”
(30 cm)
or over

Tapping

screw

(small)

Remote

control unit

holder

2”(5 cm) or over

Wall hook bracket

2-1/2”(6 cm)
or over

2”(5 cm)
or over

60”(150 cm)
or over

(Wall cap)

70”(180 cm)
or over

21-1/4”(54 cm)

12-17/32”(32 cm)

• Do not directly install it on
the ground, otherwise it
will cause failure.

2”(5 cm) or over

CAUTION

(1) When the outdoor temperature is 32 °F or less, do not use the accessory

drain pipe and drain cap. If the drain pipe and drain cap are used, the
drain water in the pipe may freeze in extremely cold weather. (Reverse
cycle model only)

(2) In the area with heavy snowfall, if the intake and outlet of outdoor unit

is blocked with snow, it is likely to cause of the breakdown. Please con­struct a canopy and a pedestal or place the unit on a high stand (local
confi gured).

• To obtain better operation effi ­ciency, when the outdoor unit
is installed, be sure to open
the front and left side.

Cord clamp

Ta b

Screw

Square hole

Insert the tab into the square hole of the
indoor unit and fasten with a screw.

Connection cord

Cord clamp

Screw

Connection cord

A. For solid core wiring (or F-cable)

(1) Cut the wire end with a wire cutter or wire-cutting pliers, then strip

the insulation to about 15/16” (25 mm) to expose the solid wire.

(2) Using a screwdriver, remove the terminal screw (s) on the terminal

board.

(3) Using pliers, bend the solid wire to form a loop suitable for the terminal

screw.

(4) Shape the loop wire properly, place it on the terminal board and

tighten securely with the terminal screw using a screwdriver.

B. For strand wiring

(1) Cut the wire end with a wire cutter or wire-cutting pliers, then strip

the insulation to about 3/8” (10 mm) to expose the strand wiring.

(2) Using a screwdriver, remove the terminal screw(s) on the terminal

board.

(3) Using a round terminal fastener or pliers, securely clamp a round

terminal to each stripped wire end.

(4) Position the round terminal wire, and replace and tighten the terminal

screw using a screwdriver.

A. Solid wire

Strip 15/16” (25 mm)

Insulation

Loop

B. Strand wire

Strip 3/8” (10 mm)

Wire

Screw with spe­cial washer

Round
terminal

Terminal
board

Terminal block

Wire

Screw with spe­cial washer

Round
terminal

HOW TO CONNECT WIRING TO THE TERMINALS

Fig. 14

(1) Match the terminal block numbers and connection

cord colors with those of the outdoor unit.

Erroneous wiring may cause burning of the electric

parts.

(2) Connect the connection cords fi rmly to the terminal

block. Imperfect installation may cause a fi re.

CAUTION

(3) Always fasten the outside covering of the connection

cord with the cord clamp. (If the insulator is chafed,
electric leakage may occur.)

(4) Always connect the ground wire.

(5) Do not use the earth screw for an external connector.

Only use for interconnection between two units.

Round
terminal

7-1/2" (190mm) 1" (25mm)

1" (25mm)

7" (175mm)

(1:1)

14AWG

EARTH WIRE

CONDUIT HOLDER

CONDUIT CONNECTOR

CAUTION

lock nut

CONDUIT HOLDER

SCREW CONDUIT

CONNECTOR

Heating Mode

About 5 to 75 °F

88 °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

Pipe length

Additional

refrigerant

66 ft (20 m)

3.5 oz (100 g)

83 ft (25 m)

7.0 oz (200 g)

99 ft (30 m)

10.5 oz (300 g)

Cut each pipe to the appropriate length +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 fi eld wiring.

CAUTION

Check local electrical codes and regulations
before obtaining wire. Also, check any specifi ed
instructions or limitations.

Small pipe Large pipe
Outer diameter Thickness Outer diameter Thickness

1/4”(6.35 mm) 0.031496 in 5/8”(15.88 mm) 0.03937 in
(0.8 mm) (1.0 mm)

CAUTION

MINIMUM CIRCUIT AMPACITY 14 A
MAXIMUM OVERCURRENT PROTECTION

20 A

(TIME DELAY FUSE OR HACR TYPE CIRCUIT BREAKER)

Connection pipe assembly

Connection cord

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

CAUTION

(1) In order to align the drain hose and drain cap, be

sure to insert securely and vertically. Incline inser­tion 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 fi x the drain hose with tape to the bottom

of piping.

(5) Prevent drain water frozen under low temperature

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.

Connection piping

Small piping

Wall hook
bracket

Alignment marks

Large piping

After hooking the indoor unit to the top hook, hook the fi ttings of the indoor
unit to the two bottom hooks while lowering the unit and pushing it against
the wall.

Top hooks

Indoor unit

(Fitting) Bottom hooks

Wall hook
bracket

7 Left rear

outlet

9315342935_IM_EN.indd 19315342935_IM_EN.indd 1 9/27/2010 9:57:52 AM9/27/2010 9:57:52 AM

12

3

4

12

3

L1 L2

G

G

LO

HI

OUTDOOR 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 fl are nut of the 3-way valve and check if air
enters, then retighten the fl are nut.

(When the fl are 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 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.

Installing the connector cover

(1) After inserting the two front hooks, then insert the rear hook.
(2) Tighten 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 diffi cult 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 2.14 ft•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.

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.

FINISHING

(1) Insulate between pipes.

● For rear, right, and bottom piping, overlap the connection pipe heat insu­lation 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 fi t into
the rear piping housing section.

(2) Temporarily fasten the connection cord along the connection pipe with vinyl

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.

FRONT PANEL REMOVAL AND INSTALLATION

THE INTAKE GRILLE REMOVAL

(1) Open the intake grille.
(2) Pull down the knob.
(3) Lift the intake grille upward, until the axle at the top of the

intake grille is removed.

THE INTAKE GRILLE INSTALLATION

(1) The fi xing axle of the intake grille is installed on the Panel.
(2) Lay down the intake grille.

THE FRONT PANEL REMOVAL

(1) Remove intake grille (Reference the intake grille removal.)
(2) Remove six screws.
(3) The thumb is hung on the lower part as shown in the fi gure,

and it pulls to the front, pushing [-] mark , and bottom hooks
(two position) is removed from wall hook bracket.

(4) The front panel is pulled to the front, raising the upper surface,

and a front panel is removed.

THE FRONT PANEL INSTALLATION

(1) Firstly, fi t the lower part of the front panel, and insert top and

bottom hooks. (Three top sides)

(2) Six screws is attached.
(3) The intake grille is attached.

POWER

Transmitter section

Test run button

TEST RUNNING

● 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 OPERATION indicator lamp and TIMER indicator lamp will simultane-

ously fl ash slowly.)

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 fl ow-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?

REMOTE CONTROL UNIT INSTALLATION

1.

REMOTE CONTROL UNIT HOLDER INSTALLATION

• Install the remote control unit with a distance of 23 ft

(7 m) between the remote control unit and the photo­cell as the criteria. However, when installing the remote
control unit, check that it operates positively.

• Install the remote control unit holder to a wall, pillar,

etc. with the tapping screw.

Tightening torque

Blank cap (2-way valve) 14.75 to 18.44 ft

•

lbs (200 to 250 kgf•cm)

Blank cap (3-way valve) 22.12 to 25.81 ft

•

lbs (300 to 350 kgf•cm)

Charging port cap 7.37 to 8.85 ft

•

lbs (100 to 120 kgf•cm)

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

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.

Tapping screw

Hooks

Connector cover

Hook

WARNING

(1) Install the unit where it will not be tilted by more

than 5°.

(2) When installing the outdoor unit where it may

exposed to strong wind, fasten it securely.

WARNING

Be sure to comply with local codes while running
the wire from the indoor unit to the outdoor unit
(size of wire and wiring method, etc. ).

Every wire must be connected fi rmly.

No wire should be allowed to touch refrigerant
tubing, the compressor or any moving part.

Loose wiring may cause the terminal to overheat
or result in unit malfunction. A fi re 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 connector
can be bought at a hardware store. Refer to “How to connect wiring
to the terminals” for instructions on connecting depending on the
wire type you are using.

• The fuse located in the outdoor unit provides power supply protec-
tion and may blow when power is applied if the system has been
incorrectly wired.

Indoor unit

Terminal

Grounding line

Control line

(Inter Unit)
Power line

DISCONNECT
SWITCH
(FIELD SUPPLY)

Outdoor unit

Terminal

POWER SUPPLY

Single-phase, 208/230V

Earth screw

Indoor unit
terminal block

Outdoor unit
terminal block

Disconnect switch

Earth screw

Power supply line

Overlap the insulation

Bind the pipes together so
that there is no gap.

Connection pipe
(heat insulation)

Vinyl tape

Indoor unit pipe
(heat insullation)

Check the following:

GOOD

Lifted up

Saddle

Wave End in water

BAD

BAD BAD

Drain hose

For connection from the left rear

Connection cord

Wall pipe

Connection pipe

Drain hose

Left piping

Connection cord

Pipe

Drain hose

Pipe

Drain hose

Cloth tape

Wrap with
cloth tape

Pipe

(Saddle)

(Outside wall cap)

(Sealer putty)

(Outdoors)

Wall

WARNING

(1) The rated voltage of this product is 208/230 V AC

60 Hz.

(2) Before turning on the power, check if the voltage

is within the 208 V -10% to 230 V +10% range.

(3) Always use a special branch circuit and install a

special receptacle to supply power to the room air
conditioner.

(4) Use a circuit breaker and receptacle matched to

the capacity of the air conditioner.
(5) Do not extend the power cord.
(6) Perform wiring work in accordance with standards

so that the air conditioner can be operated safely

and positively.
(7) Install a leakage circuit breaker in accordance

with the related laws and regulations and electric

company standards.

CAUTION

(1) The power source capacity must be the sum of

the air conditioner current and the current of other
electrical appliances. When the current contracted
capacity is insuffi cient, change the contracted
capacity.

(2) When the voltage is low and the air conditioner is

diffi cult to start, contact the power company the
voltage raised.

CUSTOMER GUIDANCE

Explain the following to the customer in accordance with the operat­ing manual:
(1) Starting and stopping method, operation switching, temperature

adjustment, timer, air fl ow switching, and other remote control unit

operations.
(2) Air fi lter removal and cleaning, and how to use the air louvers.
(3) Give the operating and installation manuals to the customer.

CAUTION

(1) Check that the indoor unit correctly receives the

signal from the remote control unit, then install
the remote control unit holder.

(2) Select the remote control unit holder selection

site by paying careful attention to the following:
Avoid places in direct sunlight.
Select a place that will not be affected by the heat
from a stove, etc.

Remote control unit
holder fi xing

Remote control
unit holder

Tapping
screw
(small)

Remote control
unit mounting

Remote con­trol unit

2 Push

1 Set

Front panel

Bearing

Mounting shaft

Intake grille

Intake grille

Knob

Top hooks
(two sides)

Top holes (two sides)

Top hole (center)

Top hook (center)

Front panel

Indoor unit

CAUTION

Install the front panel and INTAKE GRILLE securely. If installation is imperfect, the front panel or INTAKE GRILLE
may fall off and cause injury.

Wall hook bracket

Front panel

Push

[-] mark

Screws (6 position)

Push

Front panel

PUMP DOWN OPERATION (FORCED COOLING OPERATION)

To avoid discharging refrigerant into the atmosphere at the time of relocation or disposal, recover refrigerant by doing the cooling operation or forced cooling
operation according to the following procedure. (When the cooling operation cannot start in winter, and so on, start the forced cooling operation.)

(1) Do the air purging of the charge hose by connecting the charging hose of gauge manifold to the charging port of 3 way valve and opening

the low-pressure valve slightly.
(2) Close the valve stem of 2 way valve completely.
(3) Start the cooling operation or following forced cooling operation.
When using the remote control unit
Press the TEST RUN button after starting the cooling operation by the remote control unit.
The operation indicator lamp and timer indicator lamp will begin to fl ash simultaneously during test run.
When using the MANUAL AUTO button of the indoor unit (The remote control unit is lost, and so on.)
Keep on pressing the MANUAL AUTO button of the indoor unit for more than 10 seconds.
(The forced cooling operation cannot start if the MANUAL AUTO button is not kept on pressing for more than 10 seconds.)
(4) Close the valve stem of 3 way valve when the reading on the compound pressure gage becomes 0.05~0 MPa (0.5~0 kg/cm

2

).

(5) Stop the operation.

• Press the START/STOP button of the remote control unit to stop the operation.

• Press the MANUAL AUTO button when stopping the operation from indoor unit side.
(It is not necessary to press on keeping for more than 10 seconds.)

CAUTION

Install heat insulation around both the gas and liquid pipes. Failure to do so may cause water leaks.
Use heat insulation with heat resistance above 248 °F. (Reverse cycle model only)
In addition, if the humidity level at the installation location of the refrigerant piping is expected to exceed 70%, install heat insula­tion around the refrigerant piping. If the expected humidity level is 70-80%, use heat insulation that is 15 mm or thicker and if the
expected humidity exceeds 80%, use heat insulation that is 20 mm or thicker.
If heat insulation is used that is not as thick as specifi ed, condensation may form on the surface of the insulation.
In addition, use heat insulation with heat conductivity of 0.045 W/(m·K) or less (at 68 °F).

CAUTION

During the pump-down operation, make sure that the compressor is turned off before you remove the refrigerant piping.

Do not remove the connection pipe while the compressor is in operation with 2 way or 3 way valve open. This may cause abnormal pres-

sure in the refrigeration cycle that leads to breakage and even injury.

Lock nut

Control box cover

Inter-unit wire
harness

Power supply

Inter-unit wire
hamess

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