Toshiba MML-UP0071NHP-E User manual

Installation Manual
Indoor Unit
Model name:
Console Type
For commercial use
MML-UP0071NHP-E
MML-UP0091NHP-E
MML-UP0121NHP-E
MML-UP0151NHP-E
MML-UP0181NHP-E
SUPER MODULAR MULTI SYSTEM AIR CONDITIONER

– 1 –
1-EN
Installation Manual
Original instruction
Please read this Installation Manual carefully before installing the Air Conditioner.
• This Manual describes the installation method of the indoor unit.
• For installation of the outdoor unit, follow the Installation Manual attached to the outdoor unit.
ADOPTION OF NEW REFRIGERANT
This Air Conditioner is a new type which adopts a new refrigerant HFC (R410A) instead of the conventional
refrigerant R22 in order to prevent destruction of the ozone layer.
Information
If U series models (TU2C-Link) are combined with models other than U series (TCC-Link), the wiring specifications
and maximum number of connectable indoor units will be changed. Pay attentions to their communication
specifications when carrying out the installation, maintenance, or repair. For its details, refer to the
“Electrical connection” in this Manual.
1 PRECAUTIONS FOR SAFETY......................................................................................................4
2 ACCESSORY PARTS ....................................................................................................................8
3 SELECTION OF INSTALLATION PLACE.....................................................................................9
4 INSTALLATION OF INDOOR UNIT.............................................................................................11
5 CUTTING A HOLE AND MOUNTING INSTALLATION PLATE ..................................................12
6 PIPING AND DRAIN HOSE INSTALLATION ..............................................................................13
7 REFRIGERANT PIPING ..............................................................................................................15
8 ELECTRICAL CONNECTION......................................................................................................16
9 APPLICABLE CONTROLS .........................................................................................................25
10 TEST RUN ...................................................................................................................................27
11 TROUBLESHOOTING.................................................................................................................30
Contents

– 2 – 2-EN
Installation Manual
Thank you for purchasing this Toshiba air conditioner.
This Installation Manual describes the methods used to carry out the installation for the indoor unit.
For the installation of the outdoor unit, carry out the work by following the instructions in the Installation Manual
provided with the outdoor unit.
This Installation Manual contains important information that complies with the Machinery Directive
(Directive 2006/42/EC) so read through it carefully to ensure that you understand its contents.
After completing the installation work, hand over this Installation Manual as well as the Owner’s Manual provided with
the outdoor unit to the user, and ask the user to keep them in a safe place for future reference.
Provide a dedicated power outlet, which is separate from the one used for the outdoor unit, for supplying the power to
the indoor unit.
Also, the Y-shape branching joint or branch header sold separately is required for the piping connections between the
indoor unit and outdoor unit.
Select these joints or headers according to the piping system capacity.
Generic denomination : Air conditioner
Definition of qualified installer or qualified service person
The air conditioner must be installed, maintained, repaired and removed by a qualified installer or qualified service
person. When any of these jobs is to be done, ask a qualified installer or qualified service person to do them for you.
A qualified installer or qualified service person is an agent who has the qualifications and knowledge described in the
table below.
Agent Qualifications and knowledge which the agent must have
Qualified
installer
• The qualified installer is a person who installs, maintains, relocates and removes the air conditioners made
by Toshiba Carrier Corporation. He or she has been trained to install, maintain, relocate and remove the air
conditioners made by Toshiba Carrier Corporation or, alternatively, he or she has been instructed in such
operations by an individual or individuals who have been trained and is thus thoroughly acquainted with the
knowledge related to these operations.
• The qualified installer who is allowed to do the electrical work involved in installation, relocation and removal has
the qualifications pertaining to this electrical work as stipulated by the local laws and regulations, and he or she
is a person who has been trained in matters relating to electrical work on the air conditioners made by Toshiba
Carrier Corporation or, alternatively, he or she has been instructed in such matters by an individual or individuals
who have been trained and is thus thoroughly acquainted with the knowledge related to this work.
• The qualified installer who is allowed to do the refrigerant handling and piping work involved in installation,
relocation and removal has the qualifications pertaining to this refrigerant handling and piping work as stipulated
by the local laws and regulations, and he or she is a person who has been trained in matters relating to
refrigerant handling and piping work on the air conditioners made by Toshiba Carrier Corporation or, alternatively,
he or she has been instructed in such matters by an individual or individuals who have been trained and is thus
thoroughly acquainted with the knowledge related to this work.
• The qualified installer who is allowed to work at heights has been trained in matters relating to working at heights
with the air conditioners made by Toshiba Carrier Corporation or, alternatively, he or she has been instructed in
such matters by an individual or individuals who have been trained and is thus thoroughly acquainted with the
knowledge related to this work.
Qualified
service person
• The qualified service person is a person who installs, repairs, maintains, relocates and removes the air
conditioners made by Toshiba Carrier Corporation. He or she has been trained to install, repair, maintain,
relocate and remove the air conditioners made by Toshiba Carrier Corporation or, alternatively, he or she has
been instructed in such operations by an individual or individuals who have been trained and is thus thoroughly
acquainted with the knowledge related to these operations.
• The qualified service person who is allowed to do the electrical work involved in installation, repair, relocation and
removal has the qualifications pertaining to this electrical work as stipulated by the local laws and regulations,
and he or she is a person who has been trained in matters relating to electrical work on the air conditioners made
by Toshiba Carrier Corporation or, alternatively, he or she has been instructed in such matters by an individual or
individuals who have been trained and is thus thoroughly acquainted with the knowledge related to this work.
• The qualified service person who is allowed to do the refrigerant handling and piping work involved in installation,
repair, relocation and removal has the qualifications pertaining to this refrigerant handling and piping work as
stipulated by the local laws and regulations, and he or she is a person who has been trained in matters relating to
refrigerant handling and piping work on the air conditioners made by Toshiba Carrier Corporation or, alternatively,
he or she has been instructed in such matters by an individual or individuals who have been trained and is thus
thoroughly acquainted with the knowledge related to this work.
• The qualified service person who is allowed to work at heights has been trained in matters relating to working
at heights with the air conditioners made by Toshiba Carrier Corporation or, alternatively, he or she has
been instructed in such matters by an individual or individuals who have been trained and is thus thoroughly
acquainted with the knowledge related to this work.

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3-EN
Installation Manual
Definition of protective gear
When the air conditioner is to be transported, installed, maintained, repaired or removed, wear protective gloves
and ‘safety’ work clothing.
In addition to such normal protective gear, wear the protective gear described below when undertaking the special
work detailed in the table below.
Failure to wear the proper protective gear is dangerous because you will be more susceptible to injury, burns,
electric shocks and other injuries.
Work undertaken Protective gear worn
All types of work Protective gloves
‘Safety’ working clothing
Electrical-related work Gloves to provide protection for electricians and from heat
Insulating shoes
Clothing to provide protection from electric shock
Transportation of heavy objects Shoes with additional protective toe cap
Repair of outdoor unit Gloves to provide protection for electricians and from heat
These safety cautions describe important matters concerning safety to prevent injury to users or other people and
damages to property. Please read through this manual after understanding the contents below (meanings of
indications), and be sure to follow the description.
Indication Meaning of Indication
WARNING Text set off in this manner indicates that failure to adhere to the directions in the warning could result in
serious bodily harm (*1) or loss of life if the product is handled improperly.
CAUTION Text set off in this manner indicates that failure to adhere to the directions in the caution could result in slight
injury (*2) or damage (*3) to property if the product is handled improperly.
*1: Serious bodily harm indicates loss of eyesight, injury, burns, electric shock, bone fracture, poisoning, and other
injuries which leave aftereffect and require hospitalization or long-term treatment as an outpatient.
*2: Slight injury indicates injury, burns, electric shock, and other injuries which do not require hospitalization or long-term
treatment as an outpatient.
*3: Damage to property indicates damage extending to buildings, household effects, domestic livestock, and pets.
Warning indications on the air conditioner unit
Warning indication Description
WARNING
ELECTRICAL SHOCK HAZARD
Disconnect all remote
electric power supplies
before servicing.
WARNING
ELECTRICAL SHOCK HAZARD
Disconnect all remote electric power supplies before servicing.
WARNING
Moving parts.
Do not operate unit with grille
removed.
Stop the unit before the servicing.
WARNING
Moving parts.
Do not operate unit with grille removed.
Stop the unit before the servicing.
CAUTION
Do not touch the aluminum
fins of the unit.
Doing so may result in injury.
CAUTION
Do not touch the aluminium fins of the unit.
Doing so may result in injury.

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Installation Manual
1PRECAUTIONS FOR SAFETY
The manufacturer shall not assume any liability for the damage caused by not
observing the description of this manual.
WARNING
General
• Before starting to install the air conditioner, read carefully through the
Installation Manual, and follow its instructions to install the air conditioner.
• Only a qualified installer(*1) or qualified service person(*1) is allowed to
install the air conditioner. If the air conditioner is installed by an unqualified
individual, a fire, electric shocks, injury, water leakage, noise and/or vibration
may result.
• Do not use any refrigerant different from the one specified 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 front panel of the indoor unit or 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. Only a qualified installer(*1) or qualified service
person(*1) is allowed to remove the front panel of the indoor unit or service
panel of the outdoor unit and do the work required.
• Before carrying out the installation, maintenance, repair or removal work, be
sure to set the circuit breaker to the OFF position. Otherwise, electric shocks
may result.
• Place a “Work in progress” sign near the circuit breaker while the installation,
maintenance, repair or removal work is being carried out. There is a danger
of electric shocks if the circuit breaker is set to ON by mistake.
• Wear protective gloves and safety work clothing during installation, servicing
and removal.
• Do not touch the aluminum fin of the unit. You may injure yourself if you do
so. If the fin must be touched for some reason, first put on protective gloves
and safety work clothing, and then proceed.
• The refrigerant used by this air conditioner is the R410A.
• This appliance is intended to be used by expert or trained users in shops,
in light industry, or for commercial use by lay persons.
Selection of installation location
• If you install the unit in a small room, take appropriate measures to prevent
the refrigerant from exceeding the limit concentration even if it leaks.
Consult the dealer from whom you purchased the air conditioner when you
implement the measures. Accumulation of highly concentrated refrigerant
may cause an oxygen deficiency accident.

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5-EN
Installation Manual
• Do not install the air conditioner in a location that may be subject to a risk
of exposure to a combustible gas. If a combustible gas leaks and becomes
concentrated around the unit, a fire may occur.
• When transporting the air conditioner, wear shoes with additional protective
toe caps.
• Do not place any combustion appliance in a place where it is directly exposed
to the wind of air conditioner, otherwise it may cause imperfect combustion.
Installation
• Install the air conditioner at enough strong places to withstand the weight
of the unit. If the strength is not enough, the unit may fall down resulting in
injury.
• Follow the instructions in the Installation Manual to install the air conditioner.
Failure to follow these instructions may cause the product to fall down or
topple over or give rise to noise, vibration, water leakage, etc.
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 an injury.
• Tighten the flare nut with a torque wrench in the specified manner. Excessive
tighten of the flare nut may cause a crack in the flare nut after a long period,
which may result in refrigerant leakage.
• After the installation or servicing work, confirm that refrigerant gas does not
leak. If refrigerant gas leaks into the room and flows near a fire source, such
as a cooking range, noxious gas may be generated.
• 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.
• If refrigerant gas has leaked during the installation work, ventilate the room
immediately. If the leaked refrigerant gas comes in contact with fire, noxious
gas may be generated.
Electrical wiring
• Only a qualified installer(*1) or qualified service person(*1) is allowed to carry
out the electrical work of the air conditioner. Under no circumstances must
this work be done by an unqualified individual since failure to carry out the
work properly may result in electric shocks and/or electrical leaks.
• 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.

– 6 – 6-EN
Installation Manual
• Use wiring that meets the specifications in the Installation Manual and the
stipulations in the local regulations and laws. Use of wiring which does not
meet the specifications may give rise to electric shocks, electrical leakage,
smoking and/or a fire.
• Be sure to connect earth wire. (Grounding work)
Incomplete grounding causes an electric shock.
• Do not connect ground wires to gas pipes, water pipes, and lightning rods or
ground wires for telephone wires.
• After completing the repair or relocation work, check that the ground wires
are connected properly.
• Install a circuit breaker that meets the specifications in the installation manual
and the stipulations in the local regulations and laws.
• Install the circuit breaker where it can be easily accessed by the agent.
• When installing the circuit breaker outdoors, install one which is designed to
be used outdoors.
• 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 fire.
• Electrical wiring work shall be conducted according to law and regulation in
the community and Installation manual.
Failure to do so may result in electrocution/short circuit.
Test run
• Before operating the air conditioner after having completed the work, check
that the front panel 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 first conducting these checks.
• When you have noticed that some kind of trouble (such as when an error
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 qualified 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
qualified service person arrives. Continuing to use the air conditioner in
the trouble status may cause mechanical problems to escalate or result in
electric shocks, etc.
• After the work has finished, be sure to use an insulation tester set
(500V Megger) to check the resistance is 1MΩor more between the charge
section and the non-charge metal section (Earth section). If the resistance
value is low, a disaster such as a leak or electric shock is caused at user’s
side.
• 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.

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7-EN
Installation Manual
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.
• After the installation work, follow the Owner’s Manual to explain to the
customer how to use and maintain the unit.
Relocation
• Only a qualified installer(*1) or qualified service person(*1) is allowed to
relocate the air conditioner. It is dangerous for the air conditioner to be
relocated by an unqualified individual since a fire, electric shocks, injury,
water leakage, noise and/or vibration may result.
(*1) Refer to the “Definition of qualified Installer or qualified service person.”
CAUTION
New refrigerant air conditioner installation
• THIS AIR CONDITIONER ADOPTS THE NEW 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.
• Accordingly the exclusive tools are required for the new refrigerant (R410A).
• For connecting pipes, use new and clean piping designed for R410A, and
please care so that water or dust does not enter.
To disconnect the appliance from main power supply.
• This appliance must be connected to the main power supply by means of a
switch with a contact separation of at least 3 mm.
• The installation fuse must be used for the power supply line of this
conditioner.
• Tighten the flare nut with a torque wrench in the specified manner.
Excessive tightening of the flare nut may cause a crack in the flare nut after
a long period, which may result in refrigerant leakage.
• Wear heavy gloves and a long sleeve shirt during the installation work
to avoid injury.

– 8 – 8-EN
Installation Manual
2ACCESSORY PARTS
Accessory parts
Part name Q’ty Shape
Installation Manual 1
Owner's Manual 1
CD-ROM 1
Installation plate 1
Wireless remote controller 1
Battery 2
Remote control holder 1
Mounting screw Ø4 x 25r8
Flat head wood screw Ø3.1 x 16r2
Heat insulator 1
Banding band (for anchoring the insulated pipes) 2
Banding band
(for banding control and remote controller wire) 1

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9-EN
Installation Manual
3SELECTION OF INSTALLATION PLACE
WARNING
• Install the air conditioner at enough strong place to withstand the weight of the unit.
If the strength is not enough, the unit may fall down resulting in injury.
CAUTION
• Do not install the air conditioner in a location subject to a risk of exposure to a combustible gas.
If a combustible gas leaks and stays around the unit, a fire may occur.
Upon approval of the customer, install the air conditioner in a place that satisfies the following
conditions.
• Place where the unit can be installed horizontally.
• Place where a sufficient servicing space can be ensured for safety maintenance and check.
• Place where drained water will not cause any problem.
Avoid installing in the following places.
• Place exposed to air with high salt content (seaside area), or place exposed to large quantities of sulfide gas
(hot spring).
(Should the unit be used in these places, special protective measures are needed.)
• A restaurant kitchen where a lot of oil is used or place near machines in a factory (Oil adhering to the heat
exchanger and resin part (cross flow fan) in the indoor unit may reduce the performance, generate mist or dew drop,
or deform or damage resin parts.)
• Place where organic solvent is used nearby.
• Place close to a machine generating high frequency.
• Place where the discharged air blows directly into the window of the neighbour house. (Outdoor unit)
• Place where noise of the outdoor unit is easily transmitted.
(When install the outdoor unit on the boundary with the neighbour, pay due attention to the level of noise.)
• Place with poor ventilation.
• Do not use the air conditioner for special purposes such as preserving food, precision instruments, or art objects,
or where breeding animals or growing plants are kept. (This may degrade the quality of preserved materials.)
• Place where any of high-frequency appliances (including inverter devices, private power generators, medical
equipment, and communication equipment) and inverter-type fluorescent light is installed.
(A malfunction of the air conditioner, abnormal control, or problems due to noise to such appliances/equipment may
occur.)
• When the wireless remote controller is used in a room equipped with an inverter-type fluorescent light or at a place
exposed to direct sunlight, signals from the remote controller may not be received correctly.
• Place where organic solvent is used.
• Place near a door or window exposed to humid outside air (Dew dropping may form.).
• Place where special spray is used frequently.

– 10 – 10-EN
Installation Manual
Installation diagram of indoor and outdoor unit
Installation plate
Shield pipe
Flat head
wood screw
Batteries
Air filter
Wireless remote controller
Mounting screw Heat insulator
Remote control holder
300 mm or more
300 mm or more
300 mm or more
Cut the piping
hole sloped
slightly.
Make sure to run the drain hose sloped
downward.
Do not allow the drain hose to get slack.
The auxiliary piping can be connected to
the left, rear left, rear right, right, bottom
right or bottom left.
Right
Bottom
Rear
Rear
left
left
Bottom left
right
right
In case of right or left piping
Cut dot-line area
Insulate the refrigerant pipes separately
with insulation, not together.
8 mm thick heat resisting
polyethylene foam
Installation place
• A place which provides the spaces around the indoor unit as shown in the diagram.
• A place where there are no obstacles near the air inlet and outlet.
• A place which allows easy installation of the piping to the outdoor unit.
• A place which allows the front panel to be opened.
CAUTION
• Direct sunlight to the indoor unit’s wireless receiver should be avoided.
• The microprocessor in the indoor unit should not be too close to RF noise sources.
(For details, see the owner’s manual.)

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11-EN
Installation Manual
Remote control
• A place where there are no obstacles such as a curtain that may block the signal from the remote control.
• Do not install the remote control in a place exposed to direct sunlight or close to a heating source such as a stove.
• Keep the remote control at least 1 m apart from the nearest TV set or stereo equipment
(This is necessary to prevent image disturbances or noise interference).
• The location of the remote control should be determined as shown below.
60
09
7 m
7 m
45
45
7 m
Reception range
* : Axial distance
Indoor unit
(Top view)(Side view)
Remote control
Remote
control
Reception range
4INSTALLATION OF INDOOR UNIT
WARNING
Install the air conditioner certainly to sufficiently withstand the weight.
If the strength is insufficient, the unit may fall down resulting in human injury.
Perform a specified installation work to guard against strong wind or earthquake.
An incomplete installation can cause accidents by the units falling and dropping.
REQUIREMENT
Strictly comply with the following rules to prevent damage of the indoor units and human injury.
• Do not put a heavy article on the indoor unit. (Even units are packaged)
• Carry in the indoor unit as it is packaged if possible. If carrying in the indoor unit unpacked by necessity, be sure to
use buffering cloth, etc. to not damage the unit.
• To move the indoor unit, do not apply force to the refrigerant pipe, drain pan, foamed parts, or resin parts, etc.
• Carry the package by two or more persons, and do not bundle it with plastic band at positions other than specified.
Be careful to the following items when installing the unit.
• Considering air discharge direction, select an installation place where discharge air can circulate evenly in a room.
Avoid to install the unit at place with “NO GOOD” mark in the right figure.
Bad installation place
Good installation place
Cooled well all over.
OK NO GOOD
: Not cooled well.
Screen

– 12 – 12-EN
Installation Manual
5CUTTING A HOLE AND MOUNTING INSTALLATION
PLATE
Cutting a hole
60100
45
50 50 45
100 70
60
100
(Rear piping)
(Bottom piping)
(Side piping)
: Pipe hole (Ø80 mm)
1. After determining the pipe hole position, drill the pipe
hole (Ø65 mm) at a slight downward slant to the
outdoor side.
NOTE
• When drilling a wall that contains a metal lath, wire lath
or metal plate, be sure to use a pipe hole brim ring
sold separately.
Mounting the installation plate and
screw position
(Unit : mm)
230
150
(700)
(600)
(205)
15 15
90
15
15
272
560
590
670
Floor
Wall
CAUTION
When installing the installation plate with a mounting
screw, do not use the anchor bolt hole.
Otherwise the unit may fall down and result in personal
injury and property damage.
OK NO
GOOD
NO
GOOD
Ø5 mm hole
Clip anchor
(local parts)
Mounting screw
Ø4 mm x 25r
Anchor bolt
Projection
15 mm or less
CAUTION
Failure to firmly install the unit may result in personal
injury and property damage if the unit falls.
• In case of block, brick, concrete or similar type walls,
make Ø5 mm holes in the wall.
• Insert clip anchors for appropriate mounting screws.
NOTE
• Secure four corners and lower parts of the installation
plate with 6 mounting screws to install it.

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13-EN
Installation Manual
6PIPING AND DRAIN HOSE INSTALLATION
How to install indoor unit
1. Remove the air inlet grille. Open the air inlet grille and
remove the strap.
2. Remove the front panel (Remove the 4 screws).
Front panel
Hook
Air inlet grille
Layout of connection piping
NOTE
When bending the connection piping, make sure to use a
pipe bender so as not to crush the pipe.
550
108
100
6
49
85
R40
120°
80
40
6
8
122
68
85
54
29
148
99
42
122
8
5°
104
47
146
Connection piping
(liquid side)
Connection piping
(gas side)
Connection piping
4 In case of bottom right piping
5°
34
Drainage
1. Run the drain hose sloped downwards.
NOTE
• The hole should be made at a slight downward slant
on the outdoor side.
Do not rise the
drain hose.
Do not form the
drain hose into
a wavy shape.
Do not put the
drain hose end
into water.
Do not put the
drain hose end in
the drainage ditch.
2. Put water in the drain pan and make sure that the
water is drained out of doors.
3. When connecting extension drain hose, insulate the
connecting part of extension drain hose with shield
pipe.
Shield pipe
Inside the room
Drain hose
Extension
drain hose
CAUTION
Arrange the drain pipe for proper drainage from the
unit.
Improper drainage can result in dew-dropping.
How to use the heat insulation block
Heat insulation block
• Completely fill pipe hole by heat insulation block to
protect water dew.
• Heat insulation block can cut to an appropriate size
and use.

– 14 – 14-EN
Installation Manual
Mounting directly on the floor
1) Fix the leg of indoor unit on the floor with 2 mounting
screws.
2) Fix the upper part of indoor unit on the wall with
4 mounting screws.
6 screw
(M4 x 25L)
Slit
(Floor installation)
NOTE
• In case the plinth is fixed to the wall, please make sure
to cut out the slit on the left and right side of the main
part.
Cut dot-line area
Installation on the wall
1) Fix the installation plate on the wall with 4 mounting
screws.
2) Hook the indoor unit on the installation plate.
3) Fix the upper part of indoor unit on the wall with
4 mounting screws.
230
150
10
15
15
40
288
670
4 screw
(M4 x 25L)
(Wall installation)
4 screw
(M4 x 25L)
1000 mm or less
CAUTION
Make sure to fix it at a designated position with the
screws.
Failure may result the damage of piping by the turning
over of a set.
Concealed installation
1. Wall hole size
Wall hole size should be enough to keep the distance
with indoor unit as shown in the following figure.
300 or more
(Front view) (Unit : mm) (Side view)
300 or more Indoor unit 300 or more Floor
Floor
Wall
Wall
100 or less
1300 or more
900 or more
(700)
(600)
2. Installation using the supporting plate
• To install into the existing wall hole, if it is impossible
to keep 20-30 mm of depth, use the supporting plate
for securing the distance.
• Arrange the screw positions and supporting plate as
shown in the figure.
• Be sure to switch to wall burying mode.
272
560
670
580
(Rear screws potion)
: Screw holes (Unit : mm)
(Side view)
(Field supply)
(Field supply)

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15-EN
Installation Manual
7REFRIGERANT PIPING
Refrigerant piping
1. Use copper pipe with 0.8 mm or more thickness.
2. Flare nut and flare works are also different from those
of the conventional refrigerant.
Take out the flare nut attached to the main unit of the
air conditioner, and use it.
REQUIREMENT
When the refrigerant pipe is long, provide support
brackets at intervals of 2.5 to 3 m to clamp the refrigerant
pipe. Otherwise, abnormal sound may be generated.
CAUTION
IMPORTANT 4 POINTS FOR PIPING WORK
1. Remove dust and moisture from the inside of the
connecting pipes.
2. Tight connection (between pipes and unit)
3. Evacuate the air in the connecting pipes using
VACUUM PUMP.
4. Check the gas leakage. (Connected points).
Pipe size
(dia : mm)
MML- UP007 to
UP012 type
UP015 to
UP018 type
Gas side 9.5 12.7
Liquid side 6.4 6.4
Permissible piping length and
height difference
They vary according to the outdoor unit.
For details, refer to the Installation Manual attached to
the outdoor unit.
Flaring
• Cut the pipe with a pipe cutter.
Remove burrs completely.
Remaining burrs may cause gas leakage.
• Insert a flare nut into the pipe, and flare the pipe.
As the flaring sizes of R410A differ from those of
refrigerant R22, the flare tools newly manufactured for
R410A are recommended.
However, the
conventional tools can
be used by adjusting
projection margin of the
copper pipe.
4 Projection margin in flaring: B (Unit: mm)
RIDGID (Clutch type)
Outer dia. of
copper pipe
R410A tool used Conventional tool
used
R410A R410A
6.4, 9.5
0 to 0.5 1.0 to 1.5
12.7
4 Flaring dia. meter size: A (Unit: mm)
Outer dia. of copper pipe A+0
–0.4
R410A
6.4 9.1
9.5 13.2
12.7 16.6
* In case of flaring for R410A with the
conventional flare tool, pull it out
approx. 0.5 mm more than that for R22
to adjust to the specified flare size.
The copper pipe gauge is useful for
adjusting projection margin size.
Tightening connection
CAUTION
• Do not apply excessive torque. Otherwise, the nut
may crack depending on the conditions.
(Unit: N·m)
Outer dia. of copper pipe Tightening torque
6.4 mm (dia.) 14 to 18 (1.4 to 1.8 kgf·m)
9.5 mm (dia.) 33 to 42 (3.3 to 4.2 kgf·m)
12.7 mm (dia.) 50 to 62 (5.0 to 6.2 kgf·m)
4 Tightening torque of flare pipe connections
Pressure of R410A is higher than that of R22.
(Approx. 1.6 times) Therefore, using a torque wrench,
tighten the flare pipe connecting sections which connect
the indoor and outdoor units of the specified tightening
torque.
Incorrect connections may cause not only a gas leak, but
also a trouble of the refrigeration cycle.
Align the centres of the
connecting pipes and tighten
the flare nut as far as possible
with your fingers. Then tighten
the nut with a spanner and
torque wrench as shown in the
figure.
Work using double spanner

– 16 – 16-EN
Installation Manual
8ELECTRICAL
CONNECTION
REQUIREMENT
Tightening with an excessive torque may crack the nut
depending on installation conditions.
Tighten the nut within the specified tightening torque.
Piping with outdoor unit
• Shape of valve differs according to the outdoor unit.
For details of installation, refer to the Installation
Manual of the outdoor unit.
Airtight test/Air purge, etc.
For airtight test, air purge, addition of refrigerant, and gas
leak check, follow the Installation Manual attached to the
outdoor unit.
REQUIREMENT
Use a leak detector manufactured exclusively HFC
refrigerant (R410A, R134a, etc.).
Open fully valves of the outdoor unit
Heat insulation
Heat insulation for the pipes should be done separately
for the liquid side and gas side. Because both of the
liquid and gas side pipes become a low temperature
during cooling operation, sufficient heat insulation should
be done to prevent condensation.
• Heat insulator with a heat resistance of 120°C or more
must be used for the gas side pipe.
• The pipe connection section of the indoor unit must
be heat insulated securely and compactly with the
attached heat insulator.
Indoor unit
Banding band (attached)
Wrap the pipe with the attached
heat insulator without any gap
between the indoor unit.
Heat insulator (attached)
Banding band (attached)
Fix with vinyl tape
Heat insulator of the local side pipe
25
25
WARNING
1. Using the specified wires, ensure to connect the
wires, and fix wires securely so that the external
tension to the wires do not affect the connecting
part of the terminals.
Incomplete connection or fixation may cause a fire,
etc.
2. Be sure to connect earth wire. (grounding work)
Incomplete grounding cause an electric shock.
Do not connect ground wires to gas pipes, water
pipes, lightning rods or ground wires for telephone
wires.
3. Appliance shall be installed in accordance with
national wiring regulations.
Capacity shortage of power circuit or incomplete
installation may cause an electric shock or a fire.
CAUTION
• For communication line, use wires with the
same type and size. If each wire has a different
type and size from another one, it will cause a
communication trouble.
• If incorrect / incomplete wiring is carried out, it will
cause an electrical fire or smoke.
• Install an earth leakage breaker that is not tripped by
shock waves.
If an earth leakage breaker is not installed, an
electric shock may be caused.
• Use the cord clamps attached to the product.
• Do not damage or scratch the conductive core and
inner insulator of power and control wires when
peeling them.
• Use the power supply wire and control wires of
specified thickness, type, and protective devices
required.
• Do not connect 208-240V power to the terminal
blocks (Uv (U1)), (Uv (U2)), (A), (B) for control wiring.
(Otherwise, the system will fail.)
• Perform the electric wiring so that it does not come to
contact with the high-temperature part of the pipe.
The coating may melt resulting in an accident.
REQUIREMENT
• For power supply wiring, strictly conform to the Local
Regulation in each country.
• For wiring of power supply of the outdoor units,
follow the Installation Manual of each outdoor unit.
• Perform the electric wiring so that it does not come to
contact with the high-temperature part of the pipe.
The coating may melt resulting in an accident.
• After connecting wires to the terminal blocks, provide
a trap and fix wires with the cord clamp.
• Run the refrigerant piping line and control wiring line
in the same line.
• Do not turn on the power of the indoor unit until
vacuuming of the refrigerant pipes completes.

– 17 –
17-EN
Installation Manual
Power supply wire and communication wires specifications
Power supply wire and communication wires are procured locally.
For the power supply specifications, follow the table below. Power supply wiring and communication wiring are to be
procured locally.
For specifications of the power capacity of the outdoor unit and the power supply wires, refer to the Installation Manual
supplied with the outdoor unit.
Indoor unit power supply
• Prepare an exclusive power supply for the indoor unit independently of the outdoor unit.
• Arrange the power supplies to the indoor and outdoor units, so that a common earth leakage breaker and main
switch can be used.
• Power supply wire specification: Cable 3-core 2.5 mm², in conformity with Design H07RN-F or 60245 IEC 57.
4 Power supply
Power supply 220
– 240V ~, 50 Hz
208
– 230V ~, 60 Hz
Power supply switch/Earth leakage breaker or power supply wiring/fuse rating for indoor units should be selected by the accumulated
total current values of the indoor units.
Power supply wiring Below 50 m 2.5 mm2
Control wiring, Central controller wiring
• Use a 2 core non polarity wire.
• To prevent any possible noise issues, use a shielded 2 core wire.
• The total stated length of communication wiring is determined by the interconnecting length of indoor to outdoor wire
plus the length of the central control communication wire.
TCommunication line
TU2C-Link models (U series) can be combined with TCC-Link models (other than U series).
For details of communication type, refer to the following table.
Communication type and model names
Communication type TU2C-Link
(U series and future models)
TCC-Link
(Other than U series)
Outdoor unit
MMY-MUP
This letter indicates U series model.
Other than U series
MMY-MHP
MCY-MHP
MMY-MAP
Indoor unit
MM -UP
This letter indicates U series model.
Other than U series
MM -AP
Wired remote controller
RBC-ASCU
This letter indicates U series model.
Other than U series
Wireless remote
controller kit &
receiver unit
RBC-AXU
This letter indicates U series model.
Other than U series
U series outdoor unit : SMMS-u (MMY-MUP )
Other than U series outdoor unit : SMMS-i, SMMS-e etc. (MMY-MHP )

– 18 – 18-EN
Installation Manual
<In the case of combining with outdoor units of Super Modular Multi System u series (SMMS-u)>
Uv line and Uc line (L2, L3, L4)
(2-core shield wire, non-polarity) Wire size : 0.5 mm² 0.75 to 1.25 mm²
(Up to 500 m)
(Up to 1000 m)
Uh line (L1)
(2-core shield wire, non-polarity) Wire size : 0.75 to 1.25 mm² 2.0 mm²
(Up to 1000 m)
(Up to 2000 m)
• U(v, h, c) line means of control wiring.
Uv line : Between indoor and outdoor units.
Uh line : Central control line.
Uc line : Between outdoor and outdoor units.
• Uv line and Uc line are independent from another refrigerant line. Total length of Uv and Uc lines (L3+L4) in each
refrigerant line is up to 1000 m.
U3 U4
Uh
U1 U2
Uv
AB
U1 U2
Uv
AB
U1 U2
Uv
AB
U1 U2
Uv
AB
U2
Uv
U5 U6
Uc
U3 U4
Uh
U1 U2
Uv
U5 U6
Uc
U3 U4
Uh
U1 U2
Uv
U5 U6
Uc
U3 U4
Uh
U1
Central control device
Remote controller
Outdoor unit
Indoor unit
<U series>
[Uh line]
L1 = Up to 2000 m
[Uv and Uc line]
L2 = Up to 1000 m
(L3+L4) = Up to 1000 m
<U series>*
<U series>*
(SMMS-u)
* Even if the indoor unit and the remote controller are “other than U series”, the wiring specification are
the same.

– 19 –
19-EN
Installation Manual
<In the case of combining with outdoor units other than Super Modular Multi System u series (SMMS-u)>
Control wiring between indoor units, and outdoor unit (L2, L3)
(2-core shield wire, non-polarity) Wire size : 1.25 mm²
2.0 mm²
(Up to 1000 m)
(Up to 2000 m)
Central control line wiring (L1)
(2-core shield wire, non-polarity)
Control wiring between outdoor units (L4)
(2-core shield wire, non-polarity) Wire size : 1.25 to 2.0 mm² (Up to 100 m)
• The length of the communication line (L1+L2+L3) means the total length of the inter-unit wire length between indoor
and outdoor units added with the central control system wire length.
Central control device
Remote controller
Outdoor unit
Indoor unit
<U series>*
<U series>*
U3 U4
U1 U2
AB
U1 U2
AB
U1 U2
AB
U1 U2
AB
U2 U5 U6
U3 U4
U1 U2 U5 U6
U3 U4
U1 U2 U5 U6
U3 U4
U1
Uv Uv Uv Uv
<Other than U series>
[Communication line]
(L1+L2+L3) = Up to 2000 m
(SMMS-i)
(SMMS-e)
(MiNi SMMS)
etc.
* Even if the indoor unit and the remote controller are “other than U series”, the wiring specification are
the same.