Toshiba MMY-MAP1446FT9P-UL, MMY-MAP0726FT9P-UL, MMY-MAP1686FT9P-UL, MMY-MAP0966FT9P-UL, MMY-MAP1206FT9P-UL User Manual

AIR CONDITIONER (MULTI TYPE)

Installation Manual

1122001101

Outdoor Unit

Model name:

<Heat Recovery Model>

MMY-MAP0726FT9P-UL
MMY-MAP0966FT9P-UL
MMY-MAP1206FT9P-UL
MMY-MAP1446FT9P-UL
MMY-MAP1686FT9P-UL

For OUTDOOR USE only

Pour une UTILISATION EN EXTÉRIEUR

uniquement

Installation Manual 1

Manuel d’installation 32

English

Français

ADOPTION OF NEW REFRIGERANT

This Air Conditioner uses R410A an environmentally friendly refrigerant.

Contents

1 Precautions for safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

2 Accessory parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

3 Installation of R410 air conditioner. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

4 Selection of installation place . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

5 Carrying in the outdoor unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

6 Installation of the outdoor unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

7 Refrigerant piping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

8 Electric wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16

9 Address setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

10 Test run . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

– 1 –

Installing, starting up, and servicing air conditioning equipment can be hazardous due to system pressures,
electrical components, and equipment location (roofs, elevated structures, etc.).
Only trained, qualified installers and service mechanics should install, start up, and service this equipment.
Untrained personnel can perform basic maintenance functions such as indoor unit air filter. All other operations
should be performed by trained service personnel.
Before working on the equipment, observe precautions in the literature and on tags, stickers, and labels attached
to the equipment.
Follow all safety codes. Wear safety glasses and work gloves. Use care in handling, rigging, and setting bulky
equipment.
Read these instructions thoroughly and follow all warnings or cautions included in literature and attached to the
unit. Consult local building codes and National Electrical Code (NEC) for special requirements. Recognize safety
information. This is the safety alert symbol
manuals, be alert to the potential for personal injury. Understand these signal words: DANGER, WARNING, and
CAUTION. These words are used with the safety alert symbol.
DANGER identifies the most serious hazards which will result in severe personal injury or death. WARNING
signifies hazards which could result in personal injury or death. CAUTION is used to identify unsafe practices which
may result in minor personal injury or product and property damage. NOTE is used to highlight suggestions which
will result in enhanced installation, reliability, or operation.

. When you see this symbol on the unit and in instructions or

11 Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

1-EN 2-EN

1 Precautions for safety

• When the air conditioner has been installed or relocated, follow the instructions in the Installation Manual and purge the air
completely so that no gases other than the refrigerant will be mixed in the refrigerating cycle. Failure to purge the air
completely may cause the air conditioner to malfunction.

• Nitrogen gas must be used for the airtight test.

• THIS AIR CONDITIONER USES THE ENVIRONMENTALLY FRIENDLY HFC REFRIGERANT (R410A) WHICH DOES

NOT DESTROY OZONE LAYER.

The manufacturer shall not assume any liability for the damage caused by not observing the description of this manual.

WARNING

General

• Carefully read Owner’s Manual before starting the air conditioner. There are many important things to keep in mind for daily
operation.

• Ask for installation to be performed by the dealer or a professional. Only a qualifi ed installer is able to install an air
conditioner. If a non-qualifi ed person installs an air conditioner, it may result in problems such as fi re, electric shock, injury,
water leakage, noise and vibration.

• Do not use any refrigerant different from the one specifi ed for complement or replacement.
Otherwise, abnormally high pressure may be generated in the refrigeration cycle, which may result in a failure or
explosion of the product or an injury to your body.

• Before opening the service panel of the outdoor unit, set the circuit breaker to the OFF position. Failure to set the circuit
breaker to the OFF position may result in electric shocks through contact with the interior parts.

• Before carrying out the installation, maintenance, repair or removal work, be sure to set the circuit breakers for both the
indoor and outdoor units to the OFF position. Otherwise, electric shock may result.

• Wear protective gloves and safety work clothing during installation, servicing and removal.

• Do not touch the aluminium fi n of the outdoor unit. You may injure yourself if you do so. If the fi n must be touched for some
reason, fi rst put on protective gloves and safety work clothing, and then proceed.

• Do not climb onto or place objects on top of the outdoor unit. You may fall or the objects may fall off of the outdoor unit and
result in injury.

• Before cleaning the fi lter or other parts of the outdoor unit, set the circuit breaker to OFF without fail, and place a “Work in
progress” sign near the circuit breaker before proceeding with the work.

• The refrigerant used by this air conditioner is the R410A.

• The air conditioner must be transported in stable condition. If any part of the product are broken, contact your distributor.

Selection of installation location

• Do not install in a location where fl ammable gas leaks are possible. If the gas should leak and accumulate around the unit,
it may ignite and cause a fi re.

• During transporting the air conditioner, wear shoes with protective toe caps, protective gloves, and other protective clothing.

• To transport the air conditioner, do not take hold of the bands around the packing carton. You may injure yourself if the
bands should break.

• Places where the operation sound of the outdoor unit may cause a disturbance. (Especially at the boundary line with
a neighbour, install the air conditioner while considering the noise.)

Installation

• The designated bolts (M12) and nuts (M12) for securing the outdoor unit must be used when installing the unit.

• Install the outdoor unit property in a location that is durable enough to support the weight of the outdoor unit. Insuffi cient
durability may cause the outdoor unit to fall, which may result in injury.

• Install the unit in the prescribed manner for protection against strong wind and earthquake. Incorrect installation may result
in the unit falling down, or other accidents.

• Fix the screws back which have been removed for installation or other purposes.

Refrigerant piping

• Install the refrigerant pipe securely during the installation work before operating the air conditioner. If the compressor is
operated with the valve open and without refrigerant pipe, the compressor sucks air and the refrigeration cycles is over
pressurized, which may cause a injury.

• Tighten the fl are nut with a torque wrench in the specifi ed manner. Excessive tighten of the fl are nut may cause a crack in
the fl are nut after a long period, which may result in refrigerant leakage.

• Ventilate the air if the refrigerant gas leaks during installation. If the leaked refrigerant gas comes into contact with fi re, toxic
gas may be produced.

• When the air conditioner has been installed or relocated, follow the instructions in the Installation Manual and purge the air
completely so that no gases other than the refrigerant will be mixed in the refrigerating cycle. Failure to purge the air
completely may cause the air conditioner to malfunction.

• Nitrogen gas must be used for the airtight test.

Electrical wiring

• Only a certifi ed installer or qualifi ed service person is allowed to carry out the electrical work of the air conditioner.

• When connecting the electrical wires, repairing the electrical parts or undertaking other electrical jobs, wear gloves to
provide protection for electricians and from heat, insulating shoes and clothing to provide protection from electric shocks.
Failure to wear this protective gear may result in electric shocks.

• When executing address setting, test run, or troubleshooting through the checking window on the electric parts box, put on
insulated heat-proof gloves, insulated shoes and other clothing to provide protection from electric shock. Otherwise you
may receive an electric shock.

• Use wiring that meets the specifi cations in the Installation Manual, NEC and the local codes.

• Check that the product is properly grounded.

• Do not connect the ground line to a gas pipe, water pipe, lightning conductor, or a telephone ground line.

• After completing the repair or relocation work, check that the ground wires are connected properly.

• Install a circuit breaker that meets the specifi cations in the installation manual, NEC and local codes.

• Under no circumstances must the power cable be extended. Connection trouble in the places where the cable is extended
may give rise to smoking and/or a fi re.

• Do not supply power from the power terminal block equipped on the outdoor unit to another outdoor unit. Capacity overfl ow
may occur on the terminal block and may result in fi re.

• Each outdoor unit should have its own power supply.

Test run

• Before operating the air conditioner after having completed the work, check that the electrical parts box cover of the indoor
unit and service panel of the outdoor unit are closed, and set the circuit breaker to the ON position. You may receive an
electric shock if the power is turned on without fi rst conducting these checks.

• If there is any kind of trouble (such as when a check code display has appeared, there is a smell of burning, abnormal
sounds are heard, the air conditioner fails to cool or heat or water is leaking) has occurred in the air conditioner, do not
touch the air conditioner yourself but set the circuit breaker to the OFF position, and contact a qualifi ed service person.
Take steps to ensure that the power will not be turned on (by marking “out of service” near the circuit breaker, for instance)
until qualifi ed service person arrives. Continuing to use the air conditioner in the trouble status may cause mechanical
problems to escalate or result in electric shocks or other failure.

• Upon completion of the installation work, check for refrigerant leaks and check the insulation resistance and water drainage.
Then conduct a test run to check that the air conditioner is operating properly.

Explanations given to user

• Upon completion of the installation work, tell the user where the circuit breaker is located. If the user does not know where
the circuit breaker is, he or she will not be able to turn it off in the event that trouble has occurred in the air conditioner.

• If the fan grille is damaged, do not approach the outdoor unit but set the circuit breaker to the OFF position, and contact a
qualifi ed service person to have the repairs done. Do not set the circuit breaker to the ON position until the repairs are
completed.

• After the installation work, follow the Owner’s Manual to explain to the customer how to use and maintain the unit.

Relocation

• Only a certifi ed installer or service person is allowed to relocate the air conditioner.

• When the pump-down work is carried out shut down the compressor before disconnecting the refrigerant pipe.
Disconnecting the refrigerant pipe with the service valve left open and the compressor still operating will cause air or other
gas to be sucked in, raising the pressure inside the refrigeration cycle to an abnormally high level, and possibly resulting
in rupture, injury or other trouble.

•

Do not recover the refrigerant into the outdoor unit. Use a refrigerant recovery machine to recover the refrigerant after
moving or repairing. It is impossible to recover the refrigerant into the outdoor unit. Refrigerant recovery into the outdoor
unit may result in serious accidents such as explosion of the unit, injury or other accidents.

CAUTION

New Refrigerant Air Conditioner Installation

•

THIS AIR CONDITIONER USES THE ENVIRONMENTALLY FRIENDLY HFC REFRIGERANT (R410A) WHICH DOES
NOT DESTROY OZONE LAYER.

• The characteristics of R410A refrigerant are; easy to absorb water, oxidizing membrane or oil, and its pressure is approx.

1.6 times higher than that of refrigerant R22. Accompanied with the new refrigerant, refrigerating oil has also been
changed.
Therefore, during installation work, be sure that water, dust, former refrigerant, or refrigerating oil does not enter the
refrigerating cycle.

• To prevent charging an incorrect refrigerant and refrigerating oil, the sizes of connecting sections of charging port of the
main unit and installation tools are changed from those for the conventional refrigerant.

•

For connecting pipes, use new and clean piping designed for R410A, and please care so that water or dust does not
enter.

EN

FR

– 2 –

4-EN3-EN

– 3 –

• To prevent mixing of refrigerant or refrigerating oil, the size of the charge port of the main unit or connecting
section of the installation tool differs to that of an air conditioner for the former refrigerant.
Accordingly, exclusive tools are required for the new refrigerant (R410A) as shown below.

• For connecting pipes, use new and clean piping materials so that water or dust does not enter.

2 Accessory parts

Part name

Owner’s Manual 1 1 1 1 1 –

Installation Manual 1 1 1 1 1 – This manual for installer.
Attached pipe

(Ø7/8" both forward
and downward)

Attached pipe
(Ø1 1/8" both forward
and downward)

Attached pipe
(Ø3/4" both forward
and downward)

Attached pipe
(Ø3/4" both forward
and downward)

Attached pipe
(Ø7/8" both forward
and downward)

Attached pipe
(Ø1/2" for draw-out
forward)

Attached pipe
(Ø1/2" for draw-out
downward)

Attached pipe
(Ø5/8" for draw-out
forward)

Attached pipe
(Ø5/8" for draw-out
downward)

Attached pipe
(Ø3/4" for draw-out
forward)

Attached pipe
(Ø3/4" for draw-out
downward)

MAP072 MAP096 MAP120 MAP144 MAP168

11–––

––111

1––––

–11––

–––11

111––

111––

–––1–

–––1–

––––1

––––1

Q’ty

Shape Usage

(Be sure to hand it to the
customers.)

Suction-side gas pipe
Ø1"→Ø7/8" pipe fitting

Suction-side gas pipe
Ø1"→Ø1 1/8" pipe fitting

Discharge-side gas pipe
Ø5/8"→Ø3/4" pipe fitting
* Flare the connector on the

outdoor unit for installation.

Discharge-side gas pipe
* Flare the connector on the

outdoor unit for installation.

Discharge-side gas pipe
Ø3/4"→Ø7/8" pipe fitting
* Flare the connector on the

outdoor unit for installation.

Liquid pipe
* Flare the connector on the

outdoor unit for installation.

Liquid pipe
* Flare the connector on the

outdoor unit for installation.

Liquid pipe
Ø5/8"→Ø3/4" pipe fitting
* Flare the connector on the

outdoor unit for installation.

3 Installation of R410 air conditioner

This air conditioner adopts the HFC refrigerant (R410A) which does not deplete the ozone layer.

• R410A refrigerant is vulnerable to impurities such as water, oxidizing membranes, or oils because the pressure
of R410A refrigerant is higher than that of the former refrigerant by approximately 1.6 times.
As well as the adoption of the new refrigerant, the refrigerating oil has been also changed. Therefore, pay
attention so that water, dust, former refrigerant, or refrigerating oil does not enter the refrigerating cycle of the
new refrigerant air conditioner during installation.

• To prevent mixing of refrigerant or refrigerating oil, the size of the charge port of the main unit or connecting
section of the installation tool differs to that of an air conditioner for the former refrigerant.
Accordingly, exclusive tools are required for the new refrigerant (R410A) as shown below.

• For connecting pipes, use new and clean piping materials so that water or dust does not enter.

■ Required Tools and Cautions on handling

Prepare the tools and equipment listed in the following table before starting the installation work.

: R410A exclusive
: Generic

Tools/equipment Use

Manifold gauge*
Charging hose
Gas leak detector Gas leak check
Vacuum pump with backflow

prevention function
Flare tool Flare machining of pipes
Bender Bending pipes
Refrigerant recovery equipment Refrigerant recovery
Torque wrench Tightening flare nuts
Pipe cutter Cutting pipes
Brazing torch and nitrogen

cylinder
Refrigerant charging scales Charging refrigerant
4 mm hexagon wrench Opening liquid valve

Vacuuming/charging refrigerant
and operation check

Vacuum drying

Braze pipes

Usable if dimensions are adjusted.

Ø1/2" (12.7 mm) and Ø5/8" (15.9 mm)

5-EN 6-EN

4 Selection of installation place

Upon customer’s approval, install the air conditioner in a place which satisfies the following conditions:

• Place where it can be installed horizontally.

• Place which can reserve a suffi cient service space for safe maintenance or checks.

• Place where there is no problem even if the drained water overfl ows.

Avoid the following places:

• Salty places (seaside area) or places with much gas sulfi de (hot spring area) (If selecting such a place, special
maintenance is required.)

• Places where oil (including machine oil), steam, oil smoke or corrosive gas is generated.

• Places where an organic solvent is used.

• Chemical plants with a cooling system using liquid carbon dioxide.

• Places where a device generating high frequency (inverter, non-utility generator, medical apparatus, or
communication equipment) is set. (Malfunction or abnormal control of the air conditioner, or interference to
devices listed above may occur.)

• Places where discharged air from the outdoor unit blows against the windows of a neighbour’s house.

• Places unable to bear the weight of the unit.

• Places with poor ventilation.

• The unit will operate down to an outdoor temperature of 13 °F, however considerable performance decrease
will be expected below 5 °F. Therefore please consider installation location/surroundings and system design
when expected to operate between 5 °F and 13 °F.

■ Installation space

Leave space necessary for running, installation and servicing.

Air discharge

Air intake

Air intake

Installation/servicing surface

Square hole for handling

(Rear side)

19.7" (500)
or more

0.4" (10) or more

19.7" (500)
or more

(Front side)

Outdoor unit top view

LL

L Recommendation 7.9" (200mm),

at least 0.8" (20mm) or more.

0.4" (10)
or more

31.5" (800)
or less

0.4" (10) or more

Unit: in (mm)

Air intake

Air intake

L L

NOTE

• If there is an obstacle above the outdoor unit, leave a space of 78.7" (2000) or more to the top end of the outdoor
unit.

• If there is a wall around the outdoor unit, make sure that its height does not exceed 31.5" (800).

EN

FR

7-EN 8-EN

– 4 –

– 5 –

▼ Combination of outdoor units

Model name

(Standard Model)

MMY-MAP0726FT9P-UL MMY-MAP0726* – –
MMY-MAP0966FT9P-UL MMY-MAP0966* – –
MMY-MAP1206FT9P-UL MMY-MAP1206* – –
MMY-MAP1446FT9P-UL MMY-MAP1446* – –
MMY-MAP1686FT9P-UL MMY-MAP1686* – –
MMY-AP1926FT9P-UL MMY-MAP0966* MMY-MAP0966* –
MMY-AP2166FT9P-UL MMY-MAP1206* MMY-MAP0966* –
MMY-AP2406FT9P-UL MMY-MAP1446* MMY-MAP0966* –
MMY-AP2646FT9P-UL MMY-MAP1446* MMY-MAP1206* –
MMY-AP2886FT9P-UL MMY-MAP1446* MMY-MAP1446* –
MMY-AP3126FT9P-UL MMY-MAP1686* MMY-MAP1446* –
MMY-AP3366FT9P-UL MMY-MAP1206* MMY-MAP1206* MMY-MAP0966*
MMY-AP3606FT9P-UL MMY-MAP1206* MMY-MAP1206* MMY-MAP1206*
MMY-AP3846FT9P-UL MMY-MAP1446* MMY-MAP1206* MMY-MAP1206*
MMY-AP4086FT9P-UL MMY-MAP1446* MMY-MAP1446* MMY-MAP1206*
MMY-AP4326FT9P-UL MMY-MAP1446* MMY-MAP1446* MMY-MAP1446*
MMY-AP4566FT9P-UL MMY-MAP1686* MMY-MAP1446* MMY-MAP1446*

Model name

(Space Saving Model)

MMY-AP192S6FT9P-UL MMY-MAP1206* MMY-MAP0726* –
MMY-AP240S6FT9P-UL MMY-MAP1206* MMY-MAP1206* –
MMY-AP288S6FT9P-UL MMY-MAP1686* MMY-MAP1206* –
MMY-AP336S6FT9P-UL MMY-MAP1686* MMY-MAP1686* –

Unit 1 Unit 2 Unit 3

Header unit Follower unit Follower unit

Unit 1 Unit 2 Unit 3

Header unit Follower unit Follower unit

5 Carrying in the outdoor unit

CAUTION

Handle the outdoor unit carefully, observing the following items.

•

To use a forklift or other machinery for loading/unloading in transportation, insert the fork of the forklift into the
rectangular holes for handling as shown below.

•

To lift up the unit, insert a rope capable of bearing the weight of the unit into the rectangular holes shown below.
Tie the unit from 4 sides.
(Apply padding in positions where the rope comes in contact with the outdoor unit so that no damage is caused
to the outer surface of the outdoor unit.)
(There are reinforcing plates on the side surfaces, so the rope cannot be passed through.)

Correct Incorrect Incorrect

Plaster
board

■ Weight center and weight

Unit: in (mm)

◆ Weight center of an outdoor unit

(A) (B) (C)Anchor bolt position

Anchor bolt position

27.6" (700)

29.7" (755)

Z

No. Model type

(A) MAP0726FT9P-UL 20.5" (520) 15.4" (390) 24.0" (610) 600 (272)

MAP0966FT9P-UL

(B)

MAP1206FT9P-UL
MAP1446FT9P-UL

(C)

MAP1686FT9P-UL

Y

Anchor bolt position

X

29.7" (755)

Z

Anchor bolt position

36.2" (920)

Anchor bolt position

51.6" (1310)

Y

29.7" (755)

Anchor bolt position

X

Z

X

(in(mm))Y(in(mm))Z(in(mm))

23.8" (605) 15.7" (400) 23.2" (590) 721 (327)

30.3" (770) 16.3" (415) 22.4" (570) 882 (400)

X

Weight
(lb(kg))

Y

Rope

Rectangular

holes for
handling

Front/Back

Side

Incorrect

Correct

Fork of the
forklift

9-EN 10-EN

Plaster
board

Rectangular
holes for
lifting

Reinforcing
plate

6 Installation of the outdoor unit

WARNING

Install the outdoor unit securely in a location where the base can sustain the weight adequately.

If strength is insufficient, the unit may fall down resulting in human injury.

CAUTION

•

Drain water is discharged from the outdoor unit. (Especially while heating)
Install the outdoor unit in a place with good drainage.

•

For installation, be careful of the strength and level of the foundation so that abnormal sounds (vibration or noise)
are not generated.

REQUIREMENT

Installation in a snowfall area

1. Install the outdoor unit on a higher foundation than the snowfall or set up a stand to install the unit so that snowfall
will not affect the unit.

• Set up a stand higher than the snowfall.

• Apply an angled structure to the stand so that drainage will not be prevented. (Avoid using a stand with a fl at

surface.)

2. Mount a snowfall-hood onto the air inlet and the air outlet.

• Leave enough space for the snowfall-hood so that it will not be an obstacle for the air inlet and the air outlet.

Snowfall-hood for air
outlet (locally procured)

Snowfall-hood for air
outlet
(4 faces)
(locally procured)

• Anchor bolt positions are as shown below:

Continuous hole
(0.6" × 0.8" (15 × 20)
long hole)

Model type A B C L

MAP0726 27.6" (700) 39.0" (990) –
MAP0966, MAP1206 36.2" (920) 47.6" (1210) –
MAP1446, MAP1686 51.6" (1310) 63.0" (1600) 59.0" (1500)

2. To draw out the refrigerant pipe from the underside,
set the height of the stand to 19.7" (500mm) or more.

L+11.4" (290) L+11.4" (290)

A A A

BL LB

3. Do not use 4 stands on the corner to support the
outdoor unit.

29.7" (755)

B

31.1" (790)

*Only MAP144, MAP168 type has
holes for additional strength.

Recommendation 7.9" (200),
at least 0.8" (20) or more

C*
A

B

Incorrect Correct

19.7" (500mm) or more

4. If vibration-proof rubbers (including vibration-proof blocks) are used, fit them under the whole clamping legs.

Correct

Correct

Stand
(locally procured)

1. To install multiple outdoor units, arrange them with 7.9" (200mm) (recommendation, at least 0.8" (20mm)) or more
spaces in between.

Anchor bolt

Vibration-proof rubber

Install the vibration-proof
rubber so that the bend part
of the fi xing leg is
grounded.

Fix each outdoor unit with M12 anchor bolts at 4 positions. 0.8" (20mm) projection is appropriate for an anchor bolt.

Unit: in (mm)

L L

0.8"

(20)

5. Be careful of the connecting arrangement of the header unit and follower units. Set the outdoor units in order of

Incorrect Incorrect Incorrect

The bend part of the
fi xing leg is not
grounded.

EN

capacity from the one with the largest capacity. (A (Header unit) ≥ B ≥ C)

M12 anchor bolt
4 positions/unit

L

Recommendation 7.9" (200mm), at least 0.8" (20mm) or more.

• Be sure to use a header unit for the leading outdoor unit to be connected to the main pipe. (Figure 1, 3 and 6)

• Be sure to use a T-shaped branch joint (RBM-BT14FUL/RBM-BT24FUL: separately purchased) to connect each
outdoor unit.

• Be careful of the direction of the outdoor unit connection piping kit for the liquid side. (As shown in Figure 2, an

FR

outdoor unit connection piping kit cannot be attached so that the refrigerant of the main pipe fl ows directly into

11-EN 12-EN

– 6 –

the header unit.)

– 7 –

Discharge side gas piping / Liquid piping

▼ Figure 1

Correct

Main pipe

To the indoor unit

Header unit
A

Follower unit
B

Follower unit
C

▼ Figure 2

Incorrect

Incorrect

To the indoor unit

Header unit
A

Follower unit
B

Main pipe

Follower unit
C

Suction side gas piping

[Inverse connection of a gas-side branch unit]

▼ Figure 3

Correct

Header unit
A

Main pipe

To the indoor unit

Branch unit

Follower unit
B

Follower unit
C

• When attaching a Y-shaped branch unit for the outdoor unit connection piping kit, attach it level with the
ground (Be sure not to exceed ±15 degrees.). Regarding a T-shape branch joints for the liquid side, there is no
restriction for its angle.

At a level position

(Horizontal line) (Horizontal line)

A

(A arrow view) (B arrow view)

B

Within ±15 degrees

• In case of using the Y-shaped branching joint for connecting between
outdoor units (Discharge gas joint and Suction gas joint), please keep
the straight part of at least 19.7" (500mm) at the inlet.

▼ Figure 4

Incorrect

Main pipe

To the indoor unit

Header unit
A

Within ±15
degrees

19.7"

(500mm)

or more

Follower unit
B

To gas-side branch unit

Follower unit
C

Do not connect
a branch unit
vertically.

When drawing pipes downward

▼ Figure 5

Incorrect

Header unit

Main pipe

To the indoor unit

▼ Figure 6

Correct

L-shaped pipe

To gas-side branch unit

A

Suction gas joint

Header unit
A

Follower unit
B

Follower unit
B

A

Follower unit
C

A view

Suction gas joint

Unit

Vertical line

[Vertical connection of branch units]

▼ Figure 7

Incorrect

To gas-side

branch unit

To gas-side

branch unit

13-EN 14-EN

7 Refrigerant piping

• After installation, check that the refrigerant gas does not leak.

If the refrigerant gas leaks into the room and comes into contact with fire such as a fan heater, stove, or
kitchen range, noxious gas may be generated.

WARNING

•

If the refrigerant gas leaks during installation, ventilate the room.

If the leaked refrigerant gas comes into contact with fi re, noxious gas may be generated.

•

After installation, check that the refrigerant gas does not leak.

If the refrigerant gas leaks into the room and comes into contact with fi re such as a fan heater, stove, or
kitchen range, noxious gas may be generated.

■ Connection of refrigerant pipe

• The service valves are inside the outdoor unit. To
access them, remove the front panel and the piping/
wiring panel. (M5: 9 pcs.)

• As shown in the illustration on the right, the hooks

are at the right and left sides of the front panel. Lift
up and remove the front panel.

• Pipes can be drawn out forward or downward from the
outdoor unit.

• To draw out the pipe forward, draw it out to the
outside via the piping/wiring panel, and leave a space
of 19.7" (500mm) or more from the main pipe
connecting the outdoor unit with the indoor unit,
considering service work or other work on the unit.
(For replacing the compressor, 19.7" (500mm)
or more space is required.)

• To draw out the pipe downward, remove the
knockouts on the base plate of the outdoor unit, draw

(Left
piping)

19.7" (500mm)
or more

Drawing out forward

(Left piping)

(Right
piping)

Drawing out
downward

the pipes out of the outdoor unit, and perform piping on the right/left or rear side. Downward length of the balance
pipe should be 16.4 ft (5m) or less.

Packed valve of liquid side Packed valve of liquid side

Packed valve of
balance pipe

Ball valve of
discharge gas pipe

(MAP072)

Packed valve of liquid side
Ball valve of suction gas side Ball valve of suction gas side

Packed valve of
balance pipe

Ball valve of
discharge gas pipe

(MAP096, 120) (MAP144, 168)

Hook

Front panel

Piping/wiring panel

(Rear piping)

(Right piping)

Ball valve of suction gas side

Packed valve of
balance pipe

Ball valve of
discharge gas pipe

REQUIREMENT

• For a brazing work of the refrigerant pipes, be sure to use nitrogen gas in order to prevent oxidation of the inside
of the pipes; otherwise clogging of the refrigerating cycle due to oxidized scale may occur.

• Use clean and new pipes for the refrigerant pipes and perform piping work so that water or dust does not
contaminate the refrigerant.

• Be sure to use two spanners to loosen or tighten the fl are nut. If a single spanner is used, the required level of
tightening cannot be obtained. Tighten the fl are nut with the specifi ed torque. (If it is hard to loosen or tighten the
fl are nut of the balance pipe or packed valve of the liquid side with two spanners, loosen or tighten the fl are nut
while holding the valve mounting plate with a spanner.)

Unit: ft•lbs (N•m)

Outer dia. of
copper pipe

Tightening torque

Ø1/4 (6.4 mm) 10 to 13 (14 to 18)

Ø3/8 (9.5 mm) 24 to 31 (33 to 42)
Ø1/2 (12.7 mm) 37 to 46 (50 to 62)
Ø5/8 (15.9 mm) 50 to 60 (68 to 82)
Ø3/4 (19.1 mm) 74 to 88 (100 to 120)

Do not apply refrigerating oil to the surface of
the flare.

Ball valve of discharge gas side
Do not clamp the service port

with two spanners, doing so may
damage the service port.

Pipe connection method (Example)

Draw-out forward Draw-out downward

Suction-side gas
pipe

Discharge-side
gas pipe

Liquid pipe

Liquid pipe

Attachment

Attachment

Elbow

Socket

Cut the L-shaped pipe, then braze the
socket procured locally.

Braze the supplied attachment pipe
and elbow procured locally.

Braze the supplied attachment pipe
and socket procured locally.

Discharge-side
gas pipe

pipe

pipe

Pipe

Pipe

Suction-side
gas pipe

Balance
pipe

L-shaped
pipe

Pipe

Socket

Pipe

Suction-side

gas pipe

Section
to be cut

Suction-side gas
pipe

Discharge-side
gas pipe

Liquid pipe

Discharge-side
gas pipe

Liquid pipe

Attachment

pipe

Attachment

pipe

Socket

Cut the L-shaped pipe, then braze the
socket procured locally.

Braze the supplied attachment pipe
and socket procured locally.

Braze the supplied attachment pipe
and socket procured locally.

Pipe

Pipe

Suction-side
gas pipe

Balance
pipe

Pipe

L-shaped
pipe

Socket

Pipe

Socket

Suction-side

gas pipe

Section
to be cut

15-EN 16-EN

– 8 –

EN

FR

– 9 –

50

50

For more information, please refer to the engineering data book.

* Permanent operation below 80 % is not recommended.

Extruding margin of copper pipe with fl are machining: B (Unit: in (mm))

Copper pipe outer

dia.

3/8" (9.5)

1/2"(12.7)
5/8" (15.9)
3/4" (19.1)

When using R410A

tool

0 - 0.02"

(0 - 0.5)

When using

conventional tool

0.04" - 0.06"
(1.0 - 1.5)

Coupling size of brazed pipe

Connected section

External size Internal size

K

ØC

ØF

G

Extruding margin of copper pipe with fl are tools: A (Unit: in (mm))

0.25" (

0.38" (

0.5" (

0.63" (

0.76" (

0.88" (

1.13" (

1.38" (

1.63" (

+0.0016

−0.0008

+0.0016

−0.0008

+0.0016

−0.0008

+0.0016

−0.0008

+0.0012

−0.0012

+0.0012

−0.0012

+0.0024

−0.0008

+0.0016

−0.0016

+0.0031

−0.0008

Connected section

Min. depth of

+0.04

) 6.45 (
) 9.62 (

) 12.81 (

) 16.00 (
) 19.19 (
) 23.36 (
) 28.75 (
) 35.11 (
) 42.28 (

0.28 7 0.24 6 0.0024" or less 0.06 or less 0.020" 0.50

)

−0.02

+0.04

0.31 8 0.28 7 0.0031" or less 0.08 or less 0.024" 0.60

)

−0.02

+0.04

0.35 9 0.31 8 0.0039" or less 0.10 or less 0.028" 0.70

)

−0.02

+0.04

0.35 9 0.31 8 0.0051" or less 0.13 or less 0.031" 0.80

)

−0.02

+0.03

0.43 11 0.39 10 0.0059" or less 0.15 or less 0.031" 0.80

)

−0.03

+0.03

0.43 11 0.39 10 0.0063" or less 0.16 or less 0.032" 0.82

)

−0.03

+0.06

0.51 13 0.47 12 0.0079" or less 0.20 or less 0.039" 1.00

)

−0.02

+0.04

0.55 14 0.51 13 0.0098" or less 0.25 or less 0.047" 1.20

)

−0.04

+0.08

0.59 15 0.55 14 0.0110" or less 0.28 or less 0.053" 1.35

)

−0.02

insertion

Oval value

thickness

Copper pipe outer

dia.

+0

A

–0.02" (–0.4)

3/8" (9.5) 0.52" (13.2)

1/2"(12.7) 0.65" (16.6)
5/8" (15.9) 0.78" (19.7)
3/4" (19.1) 0.94" (24.0)

* When using the conventional flare tool, to connect R410A pipes with flaring, make a margin approx.

0.02" (0.5 mm) longer than that of an R22 pipe so that the flare size matches the one specified. It is convenient
to use a copper pipe gauge for size adjustment of the extruding margin.

CAUTION

Wrap the ball valve in a wet cloth to keep it cool and prevent the heat from the
torch from damaging it when connecting the pipe to the ball valve on the gas line.

Standard
outer dia.

of connected

copper pipe

External size Internal size

Standard outer dia.

(Allowable difference)

CFKG

in mm in mm in mm in mm in mm in mm in mm

Ø1/4 6.35 1/4"(±0.0012) 6.35(±0.03)
Ø3/8 9.52 3/8"(±0.0012) 9.52(±0.03)
Ø1/2 12.7 1/2"(±0.0012) 12.70(±0.03)
Ø5/8 15.88 5/8"(±0.0012) 15.88(±0.03)
Ø3/4 19.05 3/4"(±0.0012) 19.05(±0.03)

Ø7/8 22.2 7/8"(±0.0012) 22.22(±0.03)
Ø1-1/8 28.58 1-1/8"(±0.0012) 28.58(±0.04)
Ø1-3/8 34.92 1-3/8"(±0.0012) 34.90(±0.04)
Ø1-5/8 41.28 1-5/8"(±0.0012) 41.28(±0.05)

■ Selection of pipe size

Cloth

Torch

17-EN 18-EN

◆ Capacity code of indoor and outdoor units

Selection of pipe material

• For the indoor unit, the capacity code is decided at each capacity type. (Table 1)

• The capacity codes of the outdoor units are decided at each capacity type. The maximum number of connectable
indoor units and the total value of capacity codes of the indoor units are also decided. (Table 2)

NOTE

Compared with the capacity code of the outdoor unit, the total value of capacity codes of the connectable indoor
units differs based on the height difference between the indoor units.

When the height difference between the indoor units is 49 ft (15 m) or less
Total indoor capacity code must be between 80% and 135% of the capacity of the outdoor unit.

When the height difference between the indoor units is over 49 ft (15 m)
Total indoor capacity code must be between 80% and 105% of the capacity of the outdoor unit.

• If MMU-AP0072H2UL-1 or MMU-AP0122H2UL is included in the system, total indoor capacity code must be
between 80% and 100% of outdoor unit capacity.

• If MMD-AP

• when the height difference between the indoor units is over 49 ft (15 m): between 80% and 105%

• when the height difference between the indoor units is 49 ft (15 m) or less: between 80% and 120%

* If the system confi gure only the limited indoor unit type and limited number of connection indoor unit, total indoor

capacity code up to 150% of the outdoor capacity code is available when the height difference between the
indoor units is 49 ft (15 m) or less.

• If the minimum capacity of the connected indoor units is to be more than 50% and less than 80%, there are
limiting conditions.

For more information, please refer to the engineering data book.

BH is included in the system, total indoor capacity code must be,

∗∗∗

Min.

of

coupling