Toshiba MCY-MUG0401HSW-E User manual

Outdoor Unit
Model name:
MCY-MUG0401HSW-E
MCY-MUG0501HSW-E
MCY-MUG0601HSW-E
<Heat Pump Model>
AIR CONDITIONER (MULTI TYPE)
Installation Manual R32
For commercial use
English

– 1 –
Original Instruction
Please read this Installation Manual carefully before installing the Air Conditioner.
• This Manual describes the installation method of the outdoor unit.
• For installation of the indoor unit, follow the Installation Manual attached to the indoor unit.
ADOPTION OF R32 REFRIGERANT
This air conditioner adopts the HFC refrigerant (R32) which does not destroy the ozone layer.
This outdoor unit is designed exclusively for use with R32 refrigerant. Be sure to use in combination with a R32
refrigerant indoor unit.
Contents
1 Precautions for safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2 Precautions of equipment using R32 refrigerant . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
3 Accessory parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
4 Installation of R32 refrigerant air conditioner . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
5 Installation conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
6 Refrigerant piping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
7 Electric wiring. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
8 Address setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
9 Communication setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
10 Applicable control settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
11 Test run . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
12 Troubleshooting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
1-EN 2-EN

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EN
Thank you for purchasing this Toshiba air conditioner.
Please read carefully through these instructions that contain important information which complies with the
“Machinery” Directive (Directive 2006/42/EC), and ensure that you understand them.
After reading these instructions, be sure to keep them in a safe place together with the Owner’s Manual and
Installation Manual supplied with your product.
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.
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 (*1)
• The qualified installer is a person who installs, maintains, relocates and removes the air conditioners
made by Toshiba Carrier Air-conditioning Europe Sp. z o.o. He or she has been trained to install,
maintain, relocate and remove the air conditioners made by Toshiba Carrier Air-conditioning Europe
Sp. z o.o 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 Air-conditioning Europe Sp. z o.o 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 Air-conditioning Europe Sp. z o.o 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 Air-conditioning Europe Sp. z o.o 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 (*1)
• The qualified service person is a person who installs, repairs, maintains, relocates and removes the
air conditioners made by Toshiba Carrier Air-conditioning Europe Sp. z o.o. He or she has been
trained to install, repair, maintain, relocate and remove the air conditioners made by Toshiba Carrier
Air-conditioning Europe Sp. z o.o 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 Air-conditioning Europe Sp. z o.o 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 Air-conditioning Europe Sp. z o.o 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 Air-conditioning Europe Sp. z o.o
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.
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.
Center of Gravity
Work undertaken Protective gear worn
All types of work Protective gloves
‘Safety’ working clothing
Electrical-related
work
Gloves to provide protection for electricians
Insulating shoes
Clothing to provide protection from electric shock
Work done at heights
(50 cm or more) Helmets for use in industry
Transportation of
heavy objects Shoes with additional protective toecap
Repair of outdoor unit Gloves to provide protection for electricians
1050
440
(Unit : mm)
1010
370
365
175
(Unit : mm)
3-EN 4-EN

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Warning indications on the air conditioner unit
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.
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.
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.
Warning indication Description
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.
CAUTION
High temperature parts.
You might get burned when removing this panel.
CAUTION
Do not touch the aluminium fins of the unit.
Doing so may result in injury.
CAUTION
Do not touch the aluminum fins of the unit.
You might get burned.
CAUTION
BURST HAZARD
Open the service valves before the operation, otherwise there might be the
burst.
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.
CAUTION
High temperature parts.
You might get burned
when removing this panel.
CAUTION
Do not touch the aluminum
fins of the unit.
Doing so may result in injury.
CAUTION
Do not touch the
aluminum fins of
the unit. You might get
burned.
CAUTION
BURST HAZARD
Open the service valves before
the operation, otherwise there
might be the burst.
5-EN 6-EN

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EN
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 through the
Installation Manual carefully, and follow the instructions to install
the air conditioner. Otherwise, falling down of the unit may occur,
or the unit may cause noise, vibration or water leakage.
• Only a qualified installer(*1) or qualified service person(*1) is
allowed to do installation work. If installation is carried out by an
unqualified individual, a fire, electric shocks, injury, water
leakage, noise and/or vibration may result.
• If using separately sold products, make sure to use Toshiba
specified products only. Using unspecified products may cause
fire, electric shock, water leak or other failure.
• 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.
• When transporting the air conditioner, use a forklift and when
moving the air conditioner by hand, move the unit with 4 people.
• 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. Only a qualified installer (*1) or
qualified service person(*1) is allowed to remove the 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 breakers for both the
indoor and outdoor units to the OFF position. Otherwise, electric
shock 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.
• Only a qualified installer(*1) or qualified service person(*1) is
allowed to undertake work at heights using a stand of 50 cm or
more or to remove the intake grille of the indoor unit to undertake
work.
• Wear protective gloves and safety work clothing during
installation, servicing and removal.
• Do not touch the aluminum fin of the outdoor 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.
• 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.
• When working at height, put a sign in place so that no-one will
approach the work location before proceeding with the work.
Parts or other objects may fall from above, possibly injuring a
person below. Also, be sure that workers put on helmets.
• When cleaning the filter 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 R32.
7-EN 8-EN

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• Do not power other equipment such as vacuum pump from the
outdoor unit. Doing so may cause a fire or a malfunction of the air
conditioner.
• Do not disassemble, modify or move the product yourself. Doing
so may cause fire, electric shock, injury or water leaks.
• This appliance is intended to be used by expert or trained users
in shops, in light industry, or for commercial use by lay persons.
• We do not take any responsibility on the local design.
Selection of installation location
• Due to the use of the mildly flammable refrigerant R32, there are
safety and legal installation conditions for installing equipment
such as indoor units, Outdoor units, and Shut-off Valve units.
Install each unit according to the section “Installation conditions
for each equipment”.
• Do not install in a location where flammable gas may leaks are
possible. If the gas should leak and accumulate around the unit,
it may ignite and cause a fire.
• When transporting the air conditioner, wear shoes with protective
toe caps, protective gloves and other protective clothing.
• When transporting the air conditioner, do not take hold of the
bands around the packing carton. You may injure yourself if the
bands break.
• Install the indoor unit at least 2.5 m above the floor level since
otherwise the users may injure themselves or receive electric
shocks if they poke their fingers or other objects into the indoor
unit while the air conditioner is running.
• 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.
• Do not install in location where operation sound of the outdoor
unit may cause a disturbance. (Especially at the boundary line
with a neighbor, install the air conditioner while considering the
noise)
Installation
• 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 or other failure.
• The designated bolts (M10) and nuts (M10) 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. Insufficient
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.
• Be sure to 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 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.
9-EN 10-EN

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EN
• Ventilate the air if the refrigerant gas leaks during installation. If
the leaked refrigerant gas comes into contact with fire, toxic gas
may be produced.
• After the installation 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.
For prevention, install according to the section “Installation
conditions for each equipment”.
• 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.
• The charge hose must be connected in such a way that it is not
slack.
• 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. For prevention,
Install according to the section “Precautions of equipment
using R32”.
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.
• When executing address setting, test run, or troubleshooting
through the checking window on the electrical control 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 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.
• Check that the product is properly earthed. (grounding work)
Incomplete earthing may cause electric shock.
• Do not connect the earth wire to a gas pipe, water pipe, lightning
conductor, or a telephone earth wire.
• 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 or short circuit.
11-EN 12-EN

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• Do not supply power from the power terminal block equipped on
the outdoor unit to another outdoor unit. Capacity overflow may
occur on the terminal block and may result in fire.
• When carrying out electric connection, use the wire specified in
the Installation Manual and connect and fix the wires securely to
prevent them applying external force to the terminals. Improper
connection or fixing may result in fire.
Test run
• Before operating the air conditioner after having completed the
work, check that the electrical control 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 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 or other failure.
• After the work has finished, be sure to use an insulation tester set
(500 V Megger) to check the resistance is 2 MΩor 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.
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 you have discovered that the fan grille is damaged, do not
approach the outdoor unit but set the circuit breaker to the OFF
position, and contact a qualified service person (*1) 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 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/for vibration
may result.
• When carrying out the pump-down work 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.
13-EN 14-EN

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EN
• Never recover the refrigerant into the outdoor unit. Be sure to use
a refrigerant recovery machine to recover the refrigerant when
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.
(*1) Refer to the “Definition of Qualified Installer or Qualified Service
Person.”
CAUTION
This air conditioner adopts the HFC refrigerant (R32) which
does not destroy the ozone layer.
• R32 refrigerant has a high working pressure and is apt to be
affected by impurities such as water, oxidizing membrane, and
oils. Therefore, during installation work, be careful that water,
dust, previous refrigerant, refrigerating machine oil, or other
substances do not enter the R32 refrigeration cycle.
• Special tools for R32 or R410A refrigerant are required for
installation.
• For connecting pipes, use new and clean piping materials, and
make sure that water and/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.
Do not wash air conditioners with pressure washers.
• Electric leaks may cause electric shocks or fires.
Since the mildly flammable refrigerant R32 is used, for the
installation conditions and safety precautions for indoor units,
outdoor units, etc., refer to the following “Precautions for using R32
refrigerant” and do the installation works.
Precautions for using R32 refrigerant
Make sure installation, servicing, maintenance and repair comply
with instructions from TOSHIBA and with applicable legislation (for
example, national gas regulation) and are executed only by
authorized people.
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;
MEANINGS OF SYMBOLS DISPLAYED ON THE UNIT
WARNING
(Risk of
fire)
This mark is for R32 refrigerant only.
Refrigerant type is written on nameplate of
outdoor unit.
In case that refrigerant type is R32, this unit
uses a flammable refrigerant.
If refrigerant leaks and comes in contact with
fire or heating part, it will create harmful gas
and there is risk of fire.
Read the OWNER’S MANUAL carefully before operation.
Service personnel are required to carefully read the
OWNER’S MANUAL and INSTALLATION
MANUAL before operation.
Further information is available in the OWNER’S
MANUAL, INSTALLATION MANUAL, and the like.
15-EN 16-EN

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WARNING
General
• Models that use refrigerant R32 and R410A have a different
charging port thread diameter to prevent erroneous charging with
refrigerant R22 and for safety
• Do not use means to accelerate the defrosting process or to
clean, other than those recommended by the manufacturer.
• The appliance shall be stored in a room without continuously
operating ignition sources.
(For example: open flames, an operating gas appliance or an
operating electric heater.)
• Do not pierce or burn.
• Be aware that refrigerants may not contain an odor.
• The manufacturer may provide other suitable examples or may
provide additional information about the refrigerant odor.
CAUTION
When a flammable refrigerant is used, all appliance shall be
charged with refrigerant at the manufacturing location or charged
on site as recommended by the manufacturer.
A part of an appliance that is charged on site, which requires
brazing or welding in the installation shall not be shipped with a
flammable refrigerant charge. Joints made in the installation
between parts of the refrigerating system, with at least one part
charged, shall be made in accordance with the following.
- A brazed, welded, or mechanical connection shall be made
before opening the valves to permit refrigerant to flow between
the refrigerating system parts. A vacuum valve shall be provided
to evacuate the interconnecting pipe and/or any uncharged
refrigerating system part.
- Refrigerant tubing shall be protected or enclosed to avoid
damage. Flexible refrigerant connectors (such as connecting
lines between the indoor and outdoor unit) that may be displaced
during normal operations shall be protected against mechanical
damage.
• Piping shall be protected from damage during installation,
operation and maintenance.
• When installing piping in the occupied space, protect the piping
from accidental damage.
• Check the piping as described in [8 Refrigerant piping]
[Airtightness test].
• Wherever possible, protection, piping and fixtures shall be
protected against the environment and weather resistance.
• You must prepare for long-term expansion and contraction of
piping.
• Indoor equipment and plumbing must be safely installed and
protected from accidental rupture of equipment or plumbing from
events such as furniture movements or home renovations.
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EN
2Precautions of equipment using R32
refrigerant
General (Installation space / area)
• The installation of pipe-work shall be kept to a minimum.
• Pipe-work shall be protected from physical damage.
• The compliance with national gas regulations shall be observed.
• The mechanical connections shall be accessible for maintenance purposes.
• In cases that require mechanical ventilation, ventilation openings shall be kept clear of obstruction.
• When disposing of the product is used, be based on national regulations with properly processed.
• The servicing shall be performed only as recommended by the manufacturer.
• Where the appliance using flammable refrigerants is installed,
Be aware that;
- The appliance shall be stored in a well-ventilated area where the room size corresponds to the room area as
specified for operation.
- The appliance shall be stored in a room without continuously operating open flames (for example an operating
gas appliance) and ignition sources (for example an operating electric heater).
- The appliance shall be stored so as to prevent mechanical damage from occurring.
• Equipment piping in the occupied space shall be installed in such a way to protect against accidental damage in
operation and service.
• Precautions shall be taken to avoid excessive vibration or pulsation to refrigerating piping.
• Protection devices, piping and fittings shall be protected as far as possible against adverse environmental
effects, for example, the danger of water collecting and freezing in relief pipes or the accumulation of dirt and
debris.
• Provision shall be made for expansion and contraction of long runs of piping.
• Piping in refrigerating systems shall be so designed and installed to minimize the likelihood hydraulic shock
damaging the system.
• Solenoid valves shall be correctly positioned in the piping to avoid hydraulic shock.
• Install the system according to this IM and avoid the likelihood hydraulic shock damaging the system.
• Solenoid valves shall not block in liquid refrigerant unless adequate relief is provided to the refrigerant system
low pressure side.
• Install the system according to this Installation Manual so that it does not shut off in the liquid refrigerant.
• Steel pipes and components shall be protected against corrosion with a rustproof coating before applying any
insulation.
• Flexible pipe elements shall be protected against mechanical damage, excessive stress by torsion, or other
forces. They should be checked for mechanical damage annually.
• The indoor equipment and pipes shall be securely mounted and guarded such that accidental rupture of
equipment cannot occur from such events as moving furniture or reconstruction activities.
• Where safety shut off valves are specified, the minimum room area may be determined based on the maximum
amount of refrigerant that can be leaked as determined in Installation Manual.
• Where safety shut off valves are specified, the location of the valve in the refrigerating system relative to the
occupied spaces shall be as described Installation Manual.
• When installing the system that uses flammable refrigerant in a non-ventilated space, it shall be installed in the
large space or with safety equipment as designated below, so as to prevent the refrigerant from staying and
causing a fire or explosion by the refrigerant leak.
• Field-made refrigerant joints indoors shall be tightness tested. The test method shall have a sensitivity of 5 grams
per year of refrigerant or better under a pressure of at least 0,25 times the maximum allowable pressure. No leak
shall be detected.
• The total refrigerant charge in the system cannot exceed the requirements for minimum floor area of the smallest
room that is served. For minimum floor area requirements for indoor units, see the Installation and Owner’s
Manual of the outdoor unit.
• When connecting to an outdoor unit of the R32 refrigerant and using a leak detector, always turn on the power
of the indoor unit after installation except during service in order to detect refrigerant leakage and take safety
measures.
• Precautions shall be taken to avoid excessive vibration or pulsation to refrigerating piping.
• Only mechanical fittings can be used. (Example: Brazing + Flare connection)
• Refrigerating systems shall use only permanent joints indoors except for site-made joints directly connecting the
indoor unit to the refrigerant piping, or factory made mechanical joints in compliance with ISO 14903.
Unventilated area
• The appliance shall be stored so as to prevent mechanical damage from occurring.
Information on servicing
1. Check to the area
• Prior to beginning work on systems containing flammable refrigerants, safety checks are necessary to ensure
that risk of ignition is minimized. For repair to the refrigerating system, the precautions in item 2 to 6 shall be
complied with prior to conducting work on the system.
2. Work procedure
• Work shall be undertaken under a controlled procedure so as to minimize the risk of a flammable gas or vapor
being present while the work is being performed.
• When connecting to an outdoor unit of R32 refrigerant and using a leak detector, the fan may automatically
operate even if the air conditioner is stopped when a refrigerant leak is detected. Be careful not to get injured
by the fan.
• All installers and others working in the local area shall be instructed on the nature of work being carried out.
Work in confined spaces shall be avoided..
3. General work area
• All maintenance staff and others working in the local area shall be instructed on the nature of work being
carried out.
• Work in confined spaces shall be avoided.
• The area around the workspace shall be sectioned off.
• Ensure that the conditions within the area have been made safe by control of flammable material.
• Only equipment approved by the manufacturer shall be used for duct work.
4. Checking for presence of refrigerant
• The area shall be checked with an appropriate refrigerant detector prior to and during work, to ensure the
technician is aware of potentially flammable atmospheres.
• Ensure that the leak detection equipment being used is suitable for use with all applicable refrigerants, i.e.
non sparking, adequately sealed or intrinsically safe.
5. Presence of fire extinguisher
• If any hot work is to be conducted on the refrigeration equipment or any associated parts, appropriate fire
extinguishing equipment shall be available on hand.
• Have a dry powder or CO2fire extinguisher adjacent to the charging area.
6. No ignition sources
• No person carrying out work in relation to a refrigeration system which involves exposing any pipe work shall
use any sources of ignition in such a manner that it may lead to the riskof fire or explosion.
• All possible ignition sources including cigarette smoking, should be kept sufficiently far away from the site of
installation, repairing, removing and disposal, during which refrigerant can possibly be released to the
surrounding space.
19-EN 20-EN

– 11 –
• Prior to work taking place, the area around the equipment is to be surveyed to make sure that there are no
flammable hazards or ignition risks. “No Smoking” signs shall be displayed.
• Make sure that the exhaust port of the vacuum pump is not close to the ignition source and that ventilation is
possible.
7. Ventilated area
• Ensure that the area is in the open or that it is adequately ventilated before breaking into the system or
conducting any hot work.
• A degree of ventilation shall continue during the period that the work is carried out.
• The ventilation should safely disperse any released refrigerant and preferably expel it externally into the
atmosphere.
8. Checks to the refrigeration equipment
• Where electrical components are being changed, installer shall be fit for the purpose and to the correct
specification.
• At all times the manufacturer’s maintenance and service guidelines shall be followed. If in doubt consult the
manufacturer’s technical department for assistance.
• The following checks shall be applied to installations using flammable refrigerants.
- The charge size is in accordance with the room size within which the refrigerant containing parts are installed.
- The ventilation machinery and outlets are operating adequately and are not obstructed.
- If an indirect refrigerating circuit is being used, the secondary circuit shall be checked for the presence of
refrigerant.
- Marking to the equipment continues to be visible and legible. Markings and signs that are illegible shall be
corrected.
- Refrigeration pipe or components are installed in a position where they are unlikely to be exposed to any
substance which may corrode refrigerant containing components, unless the components are constructed of
materials which are inherently resistant to being corroded or are suitably protected against being so
corroded.
9. Checks to electrical devices
• Repair and maintenance to electrical components shall include initial safety checks and component
inspection procedures.
• If a fault exists that could compromise safety, then no electrical supply shall be connected to the circuit until
it is satisfactorily dealt with.
• If the fault cannot be corrected immediately but it is necessary to continue operation, an adequate temporary
solution shall be used. This shall be reported to the owner of the equipment so all parties are advised.
• Initial safety checks shall include;
- That capacitors are discharged to avoid possibility of sparking.
- That there no live electrical components and wiring are exposed while charging, recovering or purging the
system.
- That there is continuity of earth bonding.
10. Repairs to sealed components
• During repairs to sealed components, all electrical supplies shall be disconnected from the equipment being
worked upon prior to any removal of sealed covers, etc.
• If it is absolutely necessary to have an electrical supply to equipment during servicing, then a permanently
operating form of leak detection shall be located at the most critical point towarn of a potentially hazardous
situation.
• Particular attention shall be paid to the following to ensure that by working on electrical components, the
casing is not altered in such a way that the level of protection is affected.
• This shall include damage to cables, excessive number of connections, terminals not made to original
specification, damage to seals, incorrect fitting of glands, etc.
• Ensure that apparatus is mounted securely.
• Ensure that seals or sealing materials have not degraded to the point that they no longer serve the purpose
of preventing the ingress of flammable atmospheres.
• Replacement parts shall be in accordance with the manufacturer’s specifications.
NOTE
The use of silicon sealant may inhibit the effectiveness of some types of leak detection equipment. Intrinsically safe
components do not have to be isolated prior to working on them.
11. Repair to intrinsically safe components
• Do not apply any permanent inductive or capacitance loads to the circuit without ensuring that this will not
exceed the permissible voltage and current permitted for the equipment in use.
• Intrinsically safe components are the only types that can be worked on while live in the presence of a
flammable atmosphere.
• The test apparatus shall be at the correct rating.
• Replace components only with parts specified by the manufacturer.
• Other parts may result in the ignition of refrigerant in the atmosphere from a leak.
12. Cabling
• Check that cabling will not be subject to wear, corrosion, excessive pressure, vibration, sharp edges or any
other adverse environmental effects.
• Check shall also take into account the effects of aging or continual vibration from sources such as
compressors or fans.
13. Detection of flammable refrigerants
• Under no circumstances shall potential sources of ignition be used in the searching for or detection of
refrigerant leaks.
• A halide torch (or any other detector using a naked flame) shall not be used.
• Electronic leak detectors may be used to detect refrigerant leaks but, in the case of flammable refrigerants,
the sensitivity may not be adequate, or may need re-calibration. (Detection equipment shall be calibrated in
a refrigerant-free area.)
• Ensure that the detector is not a potential source of ignition and is suitable for the refrigerant used.
• Leak detection equipment shall be set at a percentage of the LFL of the refrigerant and shall be calibrated to
the refrigerant employed and the appropriate percentage of gas (25% maximum) is confirmed.
• Leak detection fluids are also suitable for use with most refrigerants but the use of detergents containing
chlorine shall be avoided as the chlorine may react with the refrigerant and corrode containing chlorine.
• If a leak is suspected, all naked flames shall be removed / extinguished.
• If a leakage of refrigerant is found which requires brazing, all of the refrigerant shall be recovered from the
system, or isolated (by means of shut off valves) in a part of the system remote from the leak.
14. Leak detection methods
• Electronic leak detectors shall be used to detect flammable refrigerants leak, but the sensitivity may not be
adequate, or may need re-calibration. (Detection equipment shall be calibrated in a refrigerant-free area.)
• Ensure that the detector is not a potential source of ignition and is suitable for the refrigerant used.
• Leak detection equipment shall be set at a percentage of the LFL of the refrigerant and shall be calibrated to
the refrigerant employed and the appropriate percentage of gas (25% maximum) is confirmed.
• Leak detection fluids are suitable for use with most refrigerants but the use of detergents containing chlorine
shall be avoided as the chlorine may react with the refrigerant and corrode the copper pipework.
• If a leak is suspected, all naked flames shall be removed / extinguished.
• If a leakage of refrigerant is found which requires brazing, all of the refrigerant shall be recovered from the
system, or isolated (by means of shut off valves) in a part of the system remote from the leak.
• Oxygen free nitrogen (OFN) shall then be purged through the system both before and during the brazing
process.
15. Removal and evacuation
• When breaking into the refrigerant circuit to make repairs or for any other purpose, Conventional procedures
shall be used. However, it is important that best practice is followed since flammability is a consideration.
The following procedure shall be adhered to:
- remove refrigerant
- purge the circuit with inert gas;
- evacuate;
21-EN 22-EN

– 12 –
EN
- purge again with inert gas;
- open the circuit by cutting or brazing;
• The refrigerant charge shall be recovered into the correct recovery cylinders.
• The system shall be “Flushed” with OFN to render the unit safe.
• This process may need to be repeated several times.
• Compressed air or oxygen shall not be used for purging refrigerant systems.
• Flushing shall be achieved by breaking the vacuum in the system with OFN and continuing to fill until the
working pressure is achieved, then venting to atmosphere, and finally pulling down to a vacuum.
• This process shall be repeated until no refrigerant is within the system.
• When the final OFN charge is used, the system shall be vented down to atmospheric pressure to enable work
to take place.
• This operation is absolutely vital if brazing operations on the pipe work are to take place.
• Ensure that the outlet for the vacuum pump is not close to any ignition sources and that ventilation available.
16. Charging procedures
• In addition to conventional charging procedures, the following requirements shall be followed.
- Ensure that contamination of different refrigerants does not occur when using charging equipment.
- Hoses or lines shall be as short as possible to minimize the amount of refrigerant contained in them.
- Cylinders shall be kept upright.
- Ensure that the refrigeration system is earthed prior to charging the system with refrigerant.
- Label the system when charging is complete (if not already).
- Extreme care shall be taken not to overfill the refrigeration system.
• Prior to recharging the system, it shall be pressure-tested with the appropriate purging gas.
• The system shall be leak tested on completion of charging but prior to commissioning.
• A follow up leak test shall be carried out prior to leaving the site.
17. Decommissioning
• Before carrying out this procedure, it is essential that the technician is completely familiar with the equipment
and all its details.
• It is recommended good practice that all refrigerants are recovered safely.
• Prior to the task being carried out, an oil and refrigerant sample shall be taken in case analysis is required to
reuse of reclaimed refrigerant.
• It is essential that electrical power is available before the task is commenced.
a) Become familiar with the equipment and its operation.
b) Isolate system electrically.
c) Before attempting the procedure ensure that:
- Mechanical handling equipment is available, if required, for handling refrigerant cylinders;
- All personal protective equipment is available and being used correctly;
- The recovery process is supervised at all times by a competent person;
- Recovery equipment and cylinders conform to the appropriate standards
d) Pump down refrigerant system, if possible.
e) If a vacuum is not possible, make a manifold so that refrigerant can be removed from various parts of the
system.
f) Make sure that cylinder is situated on the scales before recovery takes place.
g) Start the recovery machine and operate in accordance with manufacturer’s instructions.
h) Do not overfill cylinders. (No more than 80% volume liquid charge.)
i) Do not exceed the maximum working pressure of the cylinder, even temporarily.
j) When the cylinders have been filled correctly and the process completed, make sure that the cylinders and
the equipment are removed from site promptly and all isolation valves on the equipment are closed off.
k) Recovered refrigerant shall not be charged into another refrigeration system unless it has been cleaned
and checked.
18. Labelling
• Equipment shall be labelled stating that it has been decommissioned and emptied of refrigerant.
• The label shall be dated and signed.
• Ensure that there are labels on the equipment stating the equipment contains flammable refrigerant.
19. Recovery
• When removing refrigerant from a system, either for servicing or decommissioning, it is recommended good
practice that all refrigerants are removed safely.
• When transferring refrigerant into cylinders, ensure that only appropriate refrigerant recovery cylinders are
employed.
• Ensure that the correct number of cylinders for holding the total system charge are available.
• All cylinders to be used are designated for the recovered refrigerant and labelled for that refrigerant (i.e.
special cylinders for the recovery of refrigerant).
• Cylinders shall be complete with pressure-relief valve and associated shut-off valves in good working order.
• Empty recovery cylinders are evacuated and, if possible, cooled before recovery occurs.
• The recovery equipment shall be in good working order with a set of instructions concerning the equipment
that is at hand and shall be suitable for the recovery of all appropriated refrigerants.
• In addition, a set of calibrated weighing scales shall be available and in good working order.
• Hoses shall be complete with leak-free disconnect couplings and in good condition.
• Before using the recovery machine, check that it is in satisfactory working order, has been properly
maintained and that any associated electrical components are sealed to prevent ignition in the event of a
refrigerant release.
• Consult manufacturer if in doubt.
• The recovered refrigerant shall be returned to the refrigerant supplier in the correct recovery cylinder, and the
relevant waste transfer note arranged.
• Do not mix refrigerants in recovery units and especially not in cylinders.
• If compressors or compressor oils are to be removed, ensure that they have been evacuated to an acceptable
level to make certain that flammable refrigerant does not remain within the lubricant.
• The evacuation process shall be carried out prior to returning the compressor to the suppliers.
• Only electric heating to the compressor body shall be employed to accelerate this process.
• When oil is drained from a system, it shall be carried out safely.
• Do not use the unit until it is confirmed that the portion from which the refrigerant leaked is repaired.
• When installing, relocating, or servicing the air conditioner, use only the specified refrigerant (R32) to charge
the refrigerant lines. Do not mix it with any other refrigerant and do not allow air to remain in the lines.
23-EN 24-EN

– 13 –
(1) Installation conditions for each requirement
• To comply with the requirements of enhanced tightness refrigerating systems of IEC 60335-2-40, the system is
equipped with Shut-off Valve unit, Leak Detector and Battery kit. And each systems have the appropriate safety
systems in according to the system specifications. In case the requirements of this manual are followed, no
additional safety measures are needed.
• Follow the installation requirements below to ensure that the complete system is compliant to legislation.
• If you have any questions, please contact the dealer where you purchased the product.
• Depending on the conditions, safety measures (optional parts) may be required.
• System compliance has been completed to IEC60335-2-40 Ed6. If EN378 compliance is required please refer
separately to EN378 for guidance.
1) Installation conditions for each requirement
• Please observe the following warning and install according to “4. Installation of R32 refrigerant air conditioner”.
WARNING
Basically the outdoor unit has to be installed in outdoor area.
The outdoor unit has to be installed at least one side of 4 sides surrounding the unit open.
When installing indoors such as in a machine room, it shall be installed in accordance with IEC60335-2-40.
For other installation conditions, please contact the dealer where you purchased the product.
2) Indoor unit installation
For the installation of the indoor unit, refer to the installation manual attached to the indoor unit.
For the indoor unit installation of R32 air conditioning system, check the following before installing.
WARNING
• Appliance shall be installed, operated and stored in a room with a floor area larger than minimum floor area
[Amin] m2.
• For appliances using R32 refrigerant connected via an air duct system to one or more rooms, No auxiliary
devices, which may be a potential ignition source, shall be installed in the duct work. (example: hot surfaces with
a temperature exceeding 700°C and electric switching device)
• The supply and return air shall be directly ducted to the space. Open areas such as false ceilings shall not be
used as a return air duct;
• There shall be no operating ignition sources (example: open flames, an operating gas appliance or an operating
electric heater) in case the floor area is less than the minimum floor area A (m²).
For the applicable floor area and minimum floor area [Amin], refer to [ 1 ] to [ 5 ] below.
• Piping shall be installed according to the instruction in "6 Refrigerant piping". [Amin] is determined by the length
of the connection pipe, types of indoor unit, etc.
200 or
more
300 or
more
150 or
more
[1] [Confirmation of installation space and floor area]
• Make sure that each indoor unit meet the installation height and floor area specified by indoor unit type and the
total system refrigerant amount.
• Please refer to the numerical values of line A and line B in the graphs below.
Other than the lowest
basement floor The lowest floor of the basement LFL threshold
Area (a) No safety measured required. No safety measured required. A large space of LFL/4 or less.
Area (b) Leak detector required. Leak detector and safety
shut-off valve required. A large space of LFL/4 - LFL/2.
Area (c) Leak detector and safety shut-
off valve required. Installation not permitted. A narrow space of LFL/2 or more.
Area (d) Installation not permitted. Installation not permitted.
Maximum allowable total
refrigerant amount determined
from LFL
2
3
4
5
6
7
8
9
10
11
12
13
14
15
5 203550658095110
]gk[tnuomatnaregirfermetsyslatoT
Minimum floor area Amin [m2]
Ceiling mounted type include duct type
2
3
4
5
6
7
8
9
10
11
12
13
14
15
5 20 35 50 65 80 95 110
]gk[tnuomatnaregirfermetsyslatoT
Minimum floor area Amin [m2]
Wall mount and under ceiling type
(a)
(b)
(c)
(d)
(d)
(c) (b) (a)
Line A
Line B
Line A
Line B
Other than lowest
basement floor
The lowest
basement floor
25-EN 26-EN

– 14 –
EN
Line A Line B
Minimum
floor area
Amin [m2]
Total system refrigerant [kg]
Ceiling mounted type
(include duct type)
Wall mount and under
ceiling type
50.84 0.69
61.01 0.82
71.18 0.96
81.35 1.10
91.51 1.24
10 1.68 1.38
11 1.85 1.51
12 2.02 1.65
13 2.19 1.79
14 2.36 1.93
15 2.53 2.07
16 2.70 2.21
17 2.87 2.34
18 3.03 2.48
19 3.20 2.62
20 3.37 2.76
21 3.54 2.90
22 3.71 3.03
23 3.88 3.17
24 4.05 3.31
25 4.22 3.45
26 4.39 3.59
27 4.55 3.73
28 4.72 3.86
29 4.89 4.00
30 5.06 4.14
31 5.23 4.28
32 5.40 4.42
33 5.57 4.55
34 5.74 4.69
35 5.90 4.83
36 6.07 4.97
37 6.24 5.11
38 6.41 5.24
39 6.58 5.38
40 6.75 5.52
41 6.92 5.66
42 7.09 5.80
43 7.26 5.94
44 7.42 6.07
45 7.59 6.21
46 7.76 6.35
47 7.93 6.49
48 8.10 6.63
49 8.27 6.76
50 8.44 6.90
55 9.28 7.59
60 10.13 8.28
65 10.97 8.97
70 11.81 9.67
75 12.66 10.36
80 - 11.05
85 - 11.74
90 - 12.43
95 - -
Minimum
floor area
Amin [m2]
Total system refrigerant [kg]
Ceiling mounted type
(include duct type)
Wall mount and under
ceiling type
5 1.68 1.38
6 2.02 1.65
7 2.36 1.93
8 2.70 2.21
9 3.03 2.48
10 3.37 2.76
11 3.71 3.03
12 4.05 3.31
13 4.39 3.59
14 4.72 3.86
15 5.06 4.14
16 5.40 4.42
17 5.74 4.69
18 6.07 4.97
19 6.41 5.24
20 6.75 5.52
21 7.09 5.80
22 7.42 6.07
23 7.76 6.35
24 8.10 6.63
25 8.44 6.90
26 8.78 7.18
27 9.11 7.46
28 9.45 7.73
29 9.79 8.01
30 10.13 8.28
31 10.46 8.56
32 10.80 8.84
33 11.14 9.11
34 11.48 9.39
35 11.81 9.67
36 12.15 9.94
37 12.49 10.22
38 12.83 10.49
39 - 10.77
40 - 11.05
41 - 11.32
42 - 11.60
43 - 11.88
44 - 12.15
45 - 12.43
46 - 12.70
47 - -
48 - -
49 - -
50 - -
55 - -
60 - -
65 - -
70 - -
75 - -
80 - -
85 - -
90 - -
95 - -
WARNING
• The total amount of refrigerant in the system must be less than or equal to the maximum allowable total amount
of refrigerant.
The maximum allowable amount of refrigerant = 13.1 [kg].
• Keep the installation height according to the indoor unit type.
Ceiling-mounted unit (include Duct type.) : 2.2 m or more.
Wall-mounted and under ceiling unit : 1.8 m or more.
But install the indoor unit at least 2.5 m above the floor level since otherwise the users may injure themselves
or receive electric shocks if they poke their fingers or other objects into the indoor unit while the air conditioner
is running.
NOTE
• The maximum total amount of refrigerant allowed depends on the area of the room the system serves and the
room on the lowest floor of the basement.
• Please confirm that the condition for total system refrigerant amount is satisfied for [ 5 ]
[To determine the limit on the amount of additional refrigerant].
If the installation becomes impossible in the condition of [1], redesign the system again.
[2] [Safety measures]
This unit is equipped with Leak Detectors and Shut-off Valve units for safety.
For each indoor unit, the number of safety devices varies depending on the installation floor, total system
refrigerant amount, indoor unit installation height, and LFL value.
It’s not necessary to install the safety devices when the air conditioning system is installed in a large space of LFL/
4 or less.(each indoor room, outdoor area)
LD : Leak Detector
SV : Shut-off Valve units
Area Safety system Safety measures Safety system operation subsequent status
(a) No safety
measures 0 pc. - No safety system operation. Not applicable
(a)(b) Leak Detector only. 1 pc. LD When a leak is detected,
operation stops. Operation cannot be continued.
(a)(b)(c) Pump-down
operation. 2 pcs. LD or SV unit
When a leak is detected, a
system does Refrigerant
recovery to outdoor unit by
pump-down operation and
closes all safety shut-off valves.
After that, all systems stop.
Operation cannot be continued.
(Refrigerant system will be locked.)
(a)(b)(c) Individual shut-off 2 pcs. LD or
SV unit
When a leak is detected, safety
shut-off valves close only for the
indoor units which refrigerant is
leaked. After that, all systems
stop.
Operation cannot be continued only
for the indoor units which refrigerant
is detected. Other indoor units can
continue to operate.
27-EN 28-EN

– 15 –
WARNING
• For Leak Detector to function, the unit shall be powered on at all times after installation, except during service.
• If LFL area is (c), install Battery kit in each applicable Shut-off Valve unit.
They can shut-off the refrigerant by Battery kits even in the event of a power failure.
(Make sure there are no leaks before use as charging may not be in time during a continuous system power off.)
NOTE
• If there are multiple indoor units with different safety systems in refrigerant system, safety system behaviors may
be different in each indoor unit.
(Installation patterns for each safety measure)
The table below shows installation example of safety measures for each safety system.
Position where Leak Detector and Shut-off Valve unit can be installed is determined by room area, combination,
indoor unit type and capacity, etc.
For details, refer to [ 3 ] [Leak Detector installation] and [ 4 ] [Shut-off Valve installation].
[Each safety system and installation example]
Indoor
DN CODE
No [107]
Installation example Case
[00]
• When installing in a room corresponding
to area (a), set the CODE No. [107] to [00].
No additional safety measures are
required.
[01]
or
[02]
• When installing in a room corresponding
to area (c), set the CODE No. [107] to [01]
or [02].
• Be sure to install Leak Detector.
• Be sure to connect the Shut-off Valve unit
and install the battery unit.
• When the CODE No. [107] is set to [01],
the entire system will be stopped when
refrigerant leakage is detected.
• When the CODE No. [107] is set to [02],
the corresponding indoor unit wii be
stopped when refrigerant leakage is
detected (other indoor units can continue
operation).
• The position where the Shut-off Valve unit
can be installed is different according to the
setting of the CODE No. [107] ([01] or [02]).
a
bbb
Area(a)
a
bb
c
dd
ee
b
d
e
cc
Area(c) Area(c) Area(c)
a : Outdoor unit, b : Indoor unit, c : Leak Detector, d : Shut-off Valve unit, e : Battery kit
[3] [Leak Detector installation]
See Installation Manual included in Leak Detector for information on installing Leak Detector.
The Leak Detector implements have safety measures to light up in red and to sound a buzzer, that will warn in case
of a refrigerant leak.
For the leak detector installation of R32 air conditioning system, check the following before installing.
WARNING
• Leak Detector used as a safety device for the air conditioning system shall be used the specified Toshiba
optional product.
• Leak Detector installation shall be complied with the following requirements.
1. Leak detector shall be installed in each room that requires a safety measure.
2. The installation position shall be determined by the type and height of the indoor unit and the presence or the
absence of obstacles between the indoor unit and Leak Detector.
• Leak Detector shall be installed outside the indoor unit within a height of 300 mm from the floor.
• Leak Detector shall be located within 10 m horizontal distance in line sight of the unit and on a wall within the
room in which the unit is installed, or 7 m, if not in line sight of the unit, and on a wall within the room in which
the unit is installed. The distance from the unit to Leak Detector shall be measured as the shortest horizontal
unobstructed path between the unit and the nearest Leak Detector.
• The alarm shall always be 15 dB(A) louder than the room background noise.
Leak Detector can generate a 65 dB(A) alarm. (Sound pressure level, measured at a distance of 1 m from
the alarm.)
If the surrounding environment is noisy in a particular room, we recommend that you use an external alarm
(by local power supply) in that room.
Leak Detector has output terminals to external ventilation and an external alarm.
When taking safety measures using external ventilation or an external alarm, install according to the installation
manual for Leak Detector.
Indoor
DN CODE
No [107]
Installation example Case
[03]
• When the CODE No. [107] is set to [03] by
area (b), the entire system stops when
refrigerant leakage is detected.
• Be sure to install Leak Detectors.
This setting can only be used in rooms that
fall under area (b).
a
bb
c c
Area(b) Area(b)
29-EN 30-EN

– 16 –
EN
31-EN 32-EN
[Installation positions of Leak Detector]
* It must be placed within a horizontal distance of 10 meters and on the wall in the room where the indoor unit
is installed.
However, when it does not enter the field of view on a straight line from Leak Detector, it is within 7 m at the
shortest horizontal distance without obstacles and installed on the wall in the room where the indoor unit
is installed.
NOTE
Leak Detector generates visual and auditory warnings.
h0 2.2
h0 1.8
10 m*
300 mm 300 mm
>
=
>
=
<
=
<
=<
=
Indoor Unit
Leak Detector
Indoor Unit
[The examples for safety device installations]
The location of Leak Detector varies depending on the safety system and the room.
a : Outdoor unit, b : Indoor unit, c : Leak Detector, d : Shut-off Valve unit, e : Battery kit
Incorrect Correct Case
1
• Install Leak Detector
in same room as the
connected indoor
unit.
2
• Group setting of
indoor unit across
Shut-off Valve unit is
not possible
3
• Only one Leak
Detector can be
connected to indoor
units with a group
setting.
4
• Multiple Leak
Detectors cannot be
connected to one
indoor unit.
a
b
c
d
d
c
b
dd
a
cc
b
b
edde
a
cc
bb
d
e
a
cc
bb
d
e
a
bb
c
dd
ee
bb
cc
a
d
ed
e
bb
cc
a
b
b

– 17 –
[4] [Shut-off valve unit installation]
For Shut-off Valve unit installation, see Installation Manual included in Shut-off Valve unit. The position where Shut-
off Valve unit can be installed differs depending on the indoor unit, the setting of safety measures (pump down or
individual shut-off), etc.
The installation position shall be determined according to the following.
If a Shut-off Valve unit is to be used as a safety measure, a Battery kit must be installed. For details, refer to the
installation manual of Shut-off Valve unit.
Recovery by pump down (Set up the indoor DN CODE No. [107] to 1)
The allowable installation position differs depending on the length of the total connecting pipe.
◆The total connection pipe length on the downstream side of Shut-off Valve unit is 10m.
◆The connection pipe length on the downstream side of the Shut-off Valve is 50m.
◆The connection pipe length on the downstream side of the Shut-off Valve is 100m.
0
2
4
6
8
10
5 203550658095110
Total capacity of the indoor units on the
downstream side of the shut-off Valve [HP]
Minimum floor area Amin [m2]
Ceiling mounted type (include Duct type)
0
2
4
6
8
10
5 203550658095110
Total capacity of the indoor units on the
downstream side of the shut-off Valve [HP]
Minimum floor area Amin [m2]
Wall mount and under ceiling type
Installation
not permitted
Installatin permitted Installation permitted
Installation
not permitted
0
2
4
6
8
10
5 203550658095110
Total capacity of the indoor units on the
downstream side of the shut-off Valve [HP]
Minimum floor area Amin [m2]
Ceiling mounted type (include Duct type)
0
2
4
6
8
10
5 203550658095110
Total capacity of the indoor units on the
downstream side of the shut-off Valve [HP]
Minimum floor area Amin [m2]
Wall mount and under ceiling type
dettimrepnoitallatsnIdettimrepnoitallatsnI
Installation
not permitted
Installation
not permitted
0
2
4
6
8
10
5 203550658095110
Total capacity of the indoor units on the
downstream side of the shut-off Valve [HP]
Minimum floor area Amin [m2]
Wall mount and under ceiling type
0
2
4
6
8
10
5 203550658095110
Total capacity of the indoor units on the
downstream side of the shut-off Valve [HP]
Minimum floor area Amin [m2]
Ceiling mounted type (include Duct type)
Installation permitted Installation permitted
Installation
not permitted
Installation
not permitted
◆The connection pipe length on the downstream side of the Shut-off Valve is 150m.
◆The connection pipe length on the downstream side of the Shut-off Valve is 200m.
◆The connection pipe length on the downstream side of the Shut-off Valve is 300m.
0
2
4
6
8
10
5 203550658095110
Total capacity of the indoor units on the
downstream side of the shut-off Valve [HP]
Minimum floor area A
min
[m
2
]
Wall mount and under ceiling type
0
2
4
6
8
10
5 203550658095110
Total capacity of the indoor units on the
downstream side of the shut-off Valve [HP]
Minimum floor area A
min
[m
2
]
Ceiling mounted type (include Duct type)
dettimrepnoitallatsnIdettimrepnoitallatsnI
Installation
not permitted
Installation
not permitted
0
2
4
6
8
10
5 203550658095110
Total capacity of the indoor units on the
downstream side of the shut-off Valve [HP]
Minimum floor area Amin [m2]
Wall mount and under ceiling type
0
2
4
6
8
10
5 203550658095110
Total capacity of the indoor units on the
downstream side of the shut-off Valve [HP]
Minimum floor area Amin [m2]
Ceiling mounted type (include Duct type)
Installation permitted
Installation permitted
Installation
not permitted Installation
not permitted
0
2
4
6
8
10
5 203550658095110
Total capacity of the indoor units on the
downstream side of the s hut-off Valve [HP]
Minimum floor area Amin [m2]
Wall mount and under ceiling type
0
2
4
6
8
10
5 203550658095110
Total capacity of the indoor units on the
downstream side of the shut-off Valve [HP]
Minimum floor Amin [m2]
Ceiling mounted type (include Duct type)
dettimrepnoitallatsnIdettimrepnoitallatsnI
Installation
not permitted
Installation
not permitted
33-EN 34-EN

– 18 –
EN
Installation position of Shut-off valve unit in case of recovery by pump down
◆Ceiling mounted type (include Duct type)
* Including less than 1HP
◆Wall mount and under ceiling type
* Including less than 1HP
Individual shut-off (Set up the indoor DN CODE No. [107] to 2)
The allowable installation position differs depending on
the length of the total connecting pipe.
◆The total connection pipe length on the downstream side of Shut-off Valve unit is 10m.
Minimum
floor area
Amin
[m2]
Total connectable pipe length to the downstream side
of Shut-off Valve unit [m]
Total capacity of indoor units on the downstream side
of Shut-off Valve unit [HP]
1 HP* 2 HP 3 HP 4 HP 5 HP 6 HP
7.8 HP
5－－－－－－－
6－－－－－－－
7 9.6 4.6 －－－－－
8 23.7 18.8 13.8 8.8 3.8 －－
9 37.9 32.9 28.0 23.0 18.0 13.0 4.0
10 52.1 47.1 42.1 37.1 32.2 27.2 18.2
11 66.3 61.3 56.3 51.3 46.3 41.4 32.4
12 80.5 75.5 70.5 65.5 60.5 55.5 46.6
13 94.6 89.7 84.7 79.7 74.7 69.7 60.7
14 108.8 103.8 98.8 93.9 88.9 83.9 74.9
15 123.0 118.0 113.0 108.0 103.0 98.1 89.1
16 137.2 132.2 127.2 122.2 117.2 112.2 103.3
17 151.3 146.4 141.4 136.4 131.4 126.4 117.4
18 165.5 160.5 155.6 150.6 145.6 140.6 131.6
19 179.7 174.7 169.7 164.7 159.8 154.8 145.8
20 193.9 188.9 183.9 178.9 173.9 169.0 160.0
21 208.1 203.1 198.1 193.1 188.1 183.1 174.2
22 222.2 217.3 212.3 207.3 202.3 197.3 188.3
23 236.4 231.4 226.4 221.5 216.5 211.5 202.5
24 250.6 245.6 240.6 235.6 230.6 225.7 216.7
25 264.8 259.8 254.8 249.8 244.8 239.8 230.9
26 278.9 274.0 269.0 264.0 259.0 254.0 245.0
27 293.1 288.1 283.2 278.2 273.2 268.2 259.2
28 300.0 300.0 297.3 292.3 287.4 282.4 273.4
29 300.0 300.0 300.0 300.0 300.0 296.6 287.6
30 300.0 300.0 300.0 300.0 300.0 300.0 300.0
31 300.0 300.0 300.0 300.0 300.0 300.0 300.0
32 300.0 300.0 300.0 300.0 300.0 300.0 300.0
33 300.0 300.0 300.0 300.0 300.0 300.0 300.0
34 300.0 300.0 300.0 300.0 300.0 300.0 300.0
35 300.0 300.0 300.0 300.0 300.0 300.0 300.0
36 300.0 300.0 300.0 300.0 300.0 300.0 300.0
37-110 300.0 300.0 300.0 300.0 300.0 300.0 300.0
Minimum
floor area
Amin
[m2]
Total connectable pipe length to the downstream side
of Shut-off Valve unit [m]
Total capacity of indoor units on the downstream side
of Shut-off Valve unit [HP]
1 HP* 2 HP 3 HP 4 HP 5 HP 6 HP
7.8 HP
5－－－－－－－
6－－－－－－－
7－－－－－－－
83.1
－－－－－－
9 14.7 9.7 4.8 －－－－
10 26.3 21.3 16.4 11.4 6.4 1.4 －
11 37.9 32.9 28.0 23.0 18.0 13.0 4.0
12 49.5 44.5 39.6 34.6 29.6 24.6 15.6
13 61.1 56.1 51.2 46.2 41.2 36.2 27.2
14 72.7 67.7 62.8 57.8 52.8 47.8 38.8
15 84.3 79.3 74.4 69.4 64.4 59.4 50.4
16 95.9 90.9 86.0 81.0 76.0 71.0 62.0
17 107.5 102.5 97.6 92.6 87.6 82.6 73.6
18 119.1 114.1 109.2 104.2 99.2 94.2 85.2
19 130.7 125.7 120.8 115.8 110.8 105.8 96.8
20 142.3 137.3 132.4 127.4 122.4 117.4 108.4
21 153.9 148.9 144.0 139.0 134.0 129.0 120.0
22 165.5 160.5 155.6 150.6 145.6 140.6 131.6
23 177.1 172.1 167.2 162.2 157.2 152.2 143.2
24 188.7 183.7 178.8 173.8 168.8 163.8 154.8
25 200.3 195.3 190.4 185.4 180.4 175.4 166.4
26 211.9 206.9 202.0 197.0 192.0 187.0 178.0
27 223.5 218.5 213.6 208.6 203.6 198.6 189.6
28 235.1 230.1 225.2 220.2 215.2 210.2 201.2
29 246.7 241.7 236.8 231.8 226.8 221.8 212.8
30 258.3 253.3 248.4 243.4 238.4 233.4 224.4
31 269.9 264.9 260.0 255.0 250.0 245.0 236.0
32 281.5 276.5 271.6 266.6 261.6 256.6 247.6
33 293.1 288.1 283.2 278.2 273.2 268.2 259.2
34 300.0 299.7 294.8 289.8 284.8 279.8 270.8
35 300.0 300.0 300.0 300.0 296.4 291.4 282.4
36 300.0 300.0 300.0 300.0 300.0 300.0 294.0
37-110 300.0 300.0 300.0 300.0 300.0 300.0 300.0
0
2
4
6
8
10
5 203550658095110
Total capacity of the indoor units on the
downstream side of the shut-off Valve [HP]
Minimum floor area Amin [m2]
Ceiling mounted type (include Duct type)
0
2
4
6
8
10
5 203550658095110
Total capacity of the indoor units on the
downstream side of the shut-off Valve [HP]
Minimum floor area Amin [m2]
Wall mount and under ceiling type
Installation
not permitted
Installation permitted
Installation
not permitted
Installation permitted
Installation position of Shut-off Valve unit in case of individual shut-off
◆Ceiling mounted type (include Duct type)
* Including less than 1HP
◆Wall mount and under ceiling type
* Including less than 1HP
Minimum
floor area
Amin
[m2]
Connectable pipe length to the downstream side of
Shut-off Valve [m]
Total capacity of indoor units on the downstream side
of Shut-off Valve [HP]
1 HP* 2 HP 3 HP 4 HP 5 HP 6 HP 7.8 HP
5－－－－－－－
6－－－－－－－
7－－－－－－－
8－－－－－－－
9－－－－－－－
10 2.6 －－－－－－
11 5.3 －－－－－－
12 8.0 －－－－－－
13 10.8 －－－－－－
14 13.5 －－－－－－
15 16.2 －－－－－－
16 18.9 2.5 －－－－－
17 21.7 5.2 －－－－－
18 24.4 7.9 －－－－－
19 27.1 10.7 －－－－－
20 29.8 13.4 －－－－－
21 32.6 16.1 －－－－－
22 35.3 18.8 2.4 －－－－
23 38.0 21.6 5.1 －－－－
24 40.7 24.3 7.8 －－－－
25 43.5 27.0 10.6 －－－－
26 46.2 29.7 13.3 －－－－
27 48.9 32.4 16.0 －－－－
28 51.6 35.2 18.7 2.3 －－－
29 54.3 37.9 21.4 5.0 －－－
30 57.1 40.6 24.2 7.7 －－－
31 59.8 43.3 26.9 10.4 －－－
32 62.5 46.1 29.6 13.2 －－－
33 65.2 48.8 32.3 15.9 －－－
34 68.0 51.5 35.1 18.6 2.2 －－
35 70.7 54.2 37.8 21.3 4.9 －－
36 73.4 57.0 40.5 24.1 7.6 －－
37 76.1 59.7 43.2 26.8 10.3 －－
38 78.9 62.4 46.0 29.5 13.1 －－
39 81.6 65.1 48.7 32.2 15.8 －－
40 84.3 67.8 51.4 34.9 18.5 2.0 －
41 87.0 70.6 54.1 37.7 21.2 4.8 －
42 89.7 73.3 56.8 40.4 23.9 7.5 －
43 92.5 76.0 59.6 43.1 26.7 10.2 －
44 95.2 78.7 62.3 45.8 29.4 12.9 －
45 97.9 81.5 65.0 48.6 32.1 15.7 －
46 100.6 84.2 67.7 51.3 34.8 18.4 －
47 103.4 86.9 70.5 54.0 37.6 21.1 －
48 106.1 89.6 73.2 56.7 40.3 23.8 －
49 108.8 92.4 75.9 59.5 43.0 26.6 －
50 111.5 95.1 78.6 62.2 45.7 29.3 －
55 125.1 108.7 92.2 75.8 59.3 42.9 13.3
60 138.8 122.3 105.9 89.4 73.0 56.5 26.9
65 152.4 135.9 119.5 103.0 86.6 70.1 40.5
70 166.0 149.5 133.1 116.6 100.2 83.7 54.1
75 179.6 163.2 146.7 130.3 113.8 97.4 67.7
80 193.2 176.8 160.3 143.9 127.4 111.0 81.4
85 206.8 190.4 173.9 157.5 141.0 124.6 95.0
90 220.5 204.0 187.6 171.1 154.7 138.2 108.6
95 234.1 217.6 201.2 184.7 168.3 151.8 122.2
100 247.7 231.2 214.8 198.3 181.9 165.4 135.8
110 274.9 258.5 242.0 225.6 209.1 192.7 163.1
Minimum
floor area
Amin
[m2]
Connectable pipe length to the downstream side of
Shut-off Valve [m]
Total capacity of indoor units on the downstream side
of Shut-off Valve [HP]
1 HP* 2 HP －4 HP 5 HP 6 HP 7.8 HP
5－－－－－－－
6－－－－－－－
7－－－－－－－
8－－－－－－－
9－－－－－－－
10 －－－－－－－
11 －－－－－－－
12 2.1 －－－－－－
13 4.3 －－－－－－
14 6.6 －－－－－－
15 8.8 －－－－－－
16 11.0 －－－－－－
17 13.2 －－－－－－
18 15.5 －－－－－－
19 17.7 1.3 －－－－－
20 19.9 3.5 －－－－－
21 22.2 5.7 －－－－－
22 24.4 7.9 －－－－－
23 26.6 10.2 －－－－－
24 28.8 12.4 －－－－－
25 31.1 14.6 0.4 －－－－
26 33.3 16.9 2.6 －－－－
27 35.5 19.1 4.9 －－－－
28 37.8 21.3 7.1 －－－－
29 40.0 23.5 9.3 －－－－
30 42.2 25.8 11.5 －－－－
31 44.4 28.0 13.8 －－－－
32 46.7 30.2 16.0 －－－－
33 48.9 32.4 18.2 －－－－
34 51.1 34.7 20.5 1.8 －－－
35 53.4 36.9 22.7 4.0 －－－
36 55.6 39.1 24.9 6.2 －－－
37 57.8 41.4 27.1 8.5 －－－
38 60.0 43.6 29.4 10.7 －－－
39 62.3 45.8 31.6 12.9 －－－
40 64.5 48.0 33.8 15.1 －－－
41 66.7 50.3 36.0 17.4 0.9 －－
42 69.0 52.5 38.3 19.6 3.1 －－
43 71.2 54.7 40.5 21.8 5.4 －－
44 73.4 57.0 42.7 24.1 7.6 －－
45 75.6 59.2 45.0 26.3 9.8 －－
46 77.9 61.4 47.2 28.5 12.1 －－
47 80.1 63.6 49.4 30.7 14.3 －－
48 82.3 65.9 51.6 33.0 16.5 0.1 －
49 84.5 68.1 53.9 35.2 18.7 2.3 －
50 86.8 70.3 65.0 37.4 21.0 4.5 －
55 97.9 81.5 76.2 48.6 32.1 15.7 －
60 109.1 92.6 87.3 59.7 43.3 26.8 －
65 120.2 103.7 98.4 70.8 54.4 37.9 8.3
70 131.3 114.9 109.6 82.0 65.5 49.1 19.5
75 142.5 126.0 120.7 93.1 76.7 60.2 30.6
80 153.6 137.2 131.9 104.3 87.8 71.4 41.8
85 164.8 148.3 143.0 115.4 99.0 82.5 52.9
90 175.9 159.4 154.1 126.5 110.1 93.6 64.0
95 187.0 170.6 165.3 137.7 121.2 104.8 75.2
100 198.2 181.7 187.6 148.8 132.4 115.9 86.3
110 220.5 204.0 187.6 171.1 154.7 138.2 108.6
35-EN 36-EN

– 19 –
Shut-off Valve unit Installation
When Shut-off Valve unit is installed , the allowable installation position differs depending on the total amount of
refrigerant. The installation position shall be determined according to the following formula.
◆Lφ9.52+Lφ6.35 /3 ≧(mc- 8) × 14
Lφ9.52 ：Total length of φ9.52 liquid pipe between outdoor unit and Shut-off valve unit or indoor unit. [m]
Lφ6.35 ：Total length of φ6.35 liquid pipe between 1st branching section and Shut-off Valve unit or indoor
unit. [m]
mc: Total amount of refrigerant [kg]
*If the calculation indicates negative, replace it as 0.
Example: 060 type
Lφ9.52 = L1 + L2 + a1
Lφ6.35 = b + c1
* Notice that liquid pipe [b] is included.
L1
L2
a1
a2
ABC
bc1
c2
Shut-off Valve unit
Liquid Pipe
L1 9.52
L2 9.52
a1 9.52
a2 9.52
b6.35
c1 6.35
c2 6.35
Indoor unit
A MMU-UP 0241HP*
B MMU-UP0181HP*
C MMU-UP0071MH*
[5] [To determine the limit on the amount of additional refrigerant]
Determine the smallest room area to calculate the total allowable refrigerant charge limit in the system.
The area of the smallest room being served by the system is decided in the following contents to determine
the maximum allowable total charge of the system.
(1) The area of a room can be determined by projecting walls, doors and partitions onto the floor and calculating
from the enclosed area.
(2) Spaces connected by only false ceilings, ductwork, or similar connections shall not be considered a single
space.
(3) If the partition between 2 rooms on the same floor meets certain requirements then the rooms are considered
as one room and the areas of the rooms may be added up. In this way, it is possible to increase the Amin value
used to calculate the maximum allowed charge.
One of the following 2 requirements shall be met to add up room areas.
1) A room on the same floor, connected by a permanent opening that extends to the floor, and is intended for
people to pass through, and can be considered as a single room.
2) Rooms on the same floor that are connected by openings that meet the following conditions can be considered
as one room.
The opening shall consist of two parts to allow air circulation.
• Amin (a) + Amin(b) ≧mc/ (0.25 ˣLFL ˣH) = mc/ 0.04605 (m2)
• Anvmin ˃0.0123 [m2]
the opening can’t be connected to the outdoors.
the opening can’t be closed.
the lower opening shall be ≥0.012 m² (minimum opening area for natural ventilation [Anvmin]).
Areas of openings greater than 300 mm from the floor are not included in the calculation
when determining Anvmin.
50% of Anvmin or more is less than 200 mm from the floor.
the bottom of the bottom opening is 100 mm or less from the floor the height of the opening is ≧20 mm.
For the upper opening :
the opening can’t be connected to the outdoors.
the opening can’t be closed.
the upper opening shall be ≥0.006 m² (50% of Anvmin).
The bottom of the upper opening shall be at least 1500 mm from the floor.
the height of the opening is ≥20 mm.
1500 mm
≧ 20 mm
≧ 20 mm
300 mm
200 mm
≦ 100 mm
≧50% Anvmin
≧50% Anvmin
Anvmin
Front Side
Space-a (installation space) Space-a (installation space) Space-b (Space to ventilate)
Floor area : Amin(a) Floor area : Amin(b)
Opening part
A
Opening part B
Opening part A
Opening part
B
37-EN 38-EN