Toshiba MMY-MAP0801FT8, MMY-MAP1201FT8, MMY-MAP1001FT8 User Manual

INSTALLATION MANUAL

Heat Reco very Type

FILE NO. A04-002

R410A

Indoor Unit

<4-way Air Discharge Cassette Type>

MMU-AP0091H, AP0121H, AP0151H,
MMU-AP0181H, AP0241H, AP0271H,
MMU-AP0301H, AP0361H, AP0481H
MMU-AP0561H

<2-way Air Discharge Cassette Type>

MMU-AP0071WH, AP0091WH, AP0121WH,
MMU-AP0151WH, AP0181WH, AP0241WH,
MMU-AP0271WH, AP0301WH, AP0481WH*

* CHINA market only

<1-way Air Discharge Cassette Type>

MMU-AP0071YH, AP0091YH, AP0121YH,
MMU-AP0151SH, AP0181SH, AP0241SH

<Concealed Duct Standard Type>

MMD-AP0071BH, AP0091BH, AP0121BH,
MMD-AP0151BH, AP0181BH, AP0241BH,
MMD-AP0271BH, AP0301BH, AP0361BH,
MMD-AP0481BH, AP0561BH

<Concealed Duct High Static Pressure Type>

MMD-AP0181H, AP0241H, AP0271H,
MMD-AP0361H, AP0481H

Outdoor Unit

<Inverter Unit>

MMY-MAP0801FT8
MMY-MAP1001FT8
MMY-MAP1201FT8

FS unit

RBM-Y1121FE
RBM-Y1801FE

<Under Ceiling Type>

MMC-AP0151H, AP0181H, AP0241H,
MMC-AP0271H, AP0361H, AP0481H

<High Wall Type>

MMK-AP0071H, AP0091H, AP0121H,
MMK-AP0151H, AP0181H, AP0241H

<Floor Standing Cabinet Type>

MML-AP0071H, AP0091H, AP0121H,
MML-AP0151H, AP0181H, AP0241H

<Floor Standing Concealed Type>

MML-AP0071BH, AP0091BH, AP0121BH,
MML-AP0151BH, AP0181BH, AP0241BH

<Floor Standing Type>

MMF-AP0151H, AP0181H, AP0241H
MMF-AP0271H, AP0361H, AP0481H
MMF-AP0561H

PRINTED IN JAPAN, Aug, 2004 ToMo

WARNINGS ON REFRIGERANT LEAKAGE

Check of Concentration Limit

The room in which the air conditioner is to be
installed requires a design that in the event of
refrigerant gas leaking out, its concentration will
not exceed a set limit.

The refrigerant R410A which is used in the air
conditioner is safe, without the toxicity or
combustibility of ammonia, and is not restricted by
laws to be imposed which protect the ozone layer.
However, since it contains more than air, it poses the
risk of suffocation if its concentration should rise
excessively. Suffocation from leakage of R410A is
almost non-existent. With the recent increase in the
number of high concentration buildings, however, the
installation of multi air conditioner systems is on the
increase because of the need for effective use of floor
space, individual control, energy conservation by
curtailing heat and carrying power etc.
Most importantly, the multi air conditioner system is
able to replenish a large amount of refrigerant
compared with conventional individual air conditioners.
If a single unit of the multi conditioner system is to be
installed in a small room, select a suitable model and
installation procedure so that if the refrigerant
accidentally leaks out, its concentration does not
reach the limit (and in the event of an emergency,
measures can be made before injury can occur).
In a room where the concentration may exceed the
limit, create an opening with adjacent rooms, or install
mechanical ventilation combined with a gas leak
detection device.
The concentration is as given below.

Total amount of refrigerant (kg)

Min. volume of the indoor unit installed room (m³)

≤ Concentration limit (kg/m³)

The concentration limit of R410A which is used in multi
air conditioners is 0.3kg/m³.

NOTE 1 :

If there are 2 or more refrigerating systems in a single
refrigerating device, the amounts of refrigerant should
be as charged in each independent device.

e.g., charged
amount (10kg)

Room A Room B Room C Room D Room E Room F

For the amount of charge in this example:

The possible amount of leaked refrigerant gas in
rooms A, B and C is 10kg.
The possible amount of leaked refrigerant gas in
rooms D, E and F is 15kg.

Outdoor unit

e.g.,
charged amount (15kg)

Indoor unit

Important

NOTE : 2

The standards for minimum room volume are as
follows.

(1) No partition (shaded portion)

(2) When there is an effective opening with the

adjacent room for ventilation of leaking refrigerant
gas (opening without a door, or an opening 0.15%
or larger than the respective floor spaces at the
top or bottom of the door).

Outdoor unit

Refrigerant piping

Indoor unit

(3) If an indoor unit is installed in each partitioned

room and the refrigerant tubing is interconnected,
the smallest room of course becomes the object.
But when a mechanical ventilation is installed
interlocked with a gas leakage detector in the
smallest room where the density limit is exceeded,
the volume of the next smallest room becomes the
object.

Refrigerant piping

Outdoor unit

Very
small
room

Small
room

Mechanical ventilation device - Gas leak detector

Medium
room

Large room

NOTE 3 :
The minimum indoor floor area compared with the

amount of refrigerant is roughly as follows:
(When the ceiling is 2.7m high)

40

Range below the

35

m²

density limit
of 0.3 kg/m³

30

(countermeasures
not needed)

25
20
15
10

5

Min. indoor floor area

0

10 20 30

Total amount of refrigerant

Range above
the density limit
of 0.3 kg/m³
(countermeasures
needed)

Indoor unit

kg

NOTE

A direct current motor is adopted for indoor fan motor in the Concealed Duct Standard Type air conditioner.
Caused from its characteristics, a current limit works on the direct current motor. When replacing the high­performance filter or when opening the service panel, be sure to stop the fan. If an above action is executed
during the fan operation, the protectiv e control works to stop the unit operation, and the check code “P12”
may be appear. However it is not a trouble. When the desired operation has finished, be sure to reset the
system to clear “P12” error code using the electric leak breaker of the indoor unit. Then push the operation
ON/OFF button of the remote controller to return to the usual operation.

CONTENTS

1. SELECTING A LOCATION FOR INSTALLATION ..................................... 4

2. SAFETY NOTES......................................................................................... 8

3. CHECK POINTS......................................................................................... 9

4. KEY POINTS OF AIR CONDITIONER INSTALLATION .......................... 10

5. REFRIGERANT PIPE INSTALLATION .................................................... 11

6. INDOOR UNIT INSTALLATION................................................................ 41

7. FLOW SELECTOR UNIT INSTALLATION ............................................... 77

8. OUTDOOR UNIT INSTALLATION............................................................ 81

9. ELECTRIC WIRING .................................................................................. 87

10. INDOOR UNIT TERMINAL BOARD PLACEMENT AND WIRING ......... 102

11. DRAIN PIPE INSTALLATION................................................................. 107

12. ADJUSTMENT OF AIR DIRECTION...................................................... 115

13. APPLIED CONTROL.............................................................................. 119

14. ADDRESS SETUP.................................................................................. 123

15. TEST OPERATION ................................................................................. 136

16. SUPPORT FUNCTION IN TEST OPERATION ....................................... 143

17. TROUBLESHOOTING............................................................................ 165

18. AIR SPEED CHARACTERISTICS.......................................................... 170

19. FAN CHARACTERISTICS...................................................................... 175

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 charged 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. Moreover, do not use the existing piping because there are problems with pressure­resistance force and impurity in it.

1. SELECTING A LOCATION FOR INSTALLATION

WARNING

Install the air conditioner certainly at a location 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 a great wind such as typhoon or an
earth quake.

An incomplete installation can cause accidents by the units failing and dropping.

The following models must be installed at height 2.5m or more from the floor.
(Concealed type duct type and cassette type air conditioners)

If you insert your hands or others directly into the unit while the air conditioner operates, it is dangerous

because you may contact with revolving fan or active electricity.

Installation Location Selection for Outdoor unit

Obtain permission from the customer to install the unit in a location that satisfies the
following requirements :

• A location that permits level installation of the unit.

• A location that provides enough space to service the unit safety

• A location where water draining from the unit will not pose a 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.)

• Place exposed to oil, vapor, oil smoke or corrosive gas.

• 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 neighboring house. (For outdoor unit)

• Place where noise of the outdoor unit is easily transmitted.
(When installing the air conditioner on the boundary with the neighbor, pay due attention to the level of noise.)

• Place with poor ventilation.
(Especially in Concealed duct type indoor unit, before air ducting work, check whether value of air volume,
static pressure and duct resistance are correct.)

4

Equipments

1. Outdoor units

Corresponding HP

Model name MMY- MAP0801FT8 MAP1001FT8 MAP1201FT8

Cooling capacity (kW) 22.4 28.0 33.5

Heating capacity (kW) 25.0 31.5 35.5

HP

(Capacity code)

8 HP ( 8) MAP0801HT8 1 MAP0801FT8 1

10 H P (10) MAP1001HT8 1 MAP1001FT8 1
12 H P (12) MAP1201HT8

Model name

MMY-

combined units

8 HP 10 HP 12 HP

No. of

1

Inverter 8HP

Inverter unit

MMY-

Used

Q’ty

Inverter 10HP

MMY-

Allocation atandard of model name

MMY– MAP T 8

F

Used

Q’ty

Appearance

Inverter 12HP

MMY-

MAP1201FT8

Used

Q’ty

1

Power supply specifications, 3Ø 380–415 V, 50Hz ....... 8

T : Capacity variable unit

F : Heat recovery

Development series No.
Capacity rank HP x 10
New refrigerant R410A
M : Single module unit, No mark : Combined Model name
Modular Multi

2. FS units (Flow selector units)

Model name Inverter unit Appearance

RBM-Y1121FE Capacity rank f or indoor unit : Type 007 to 030

RBM-Y1801FE Capacity rank f or indoor unit : Type 036 to 056

∗ Accessory part : Connection cable kit (RBC-CBK15FE), up to 15m.

5

3. Indoor units

Type Appearance Model name Capacity rank Capaci t y code

009 type 1 2.8
012 type 1.25 3.6
015 type 1.7 4.5
018 type 2 5.6
024 type 2.5 7.1
027 type 3 8.0
030 type 3.2 9.0
036 type 4 11.2
048 type 5 14.0
056 type 6 16.0
007 type 0.8 2.2
009 type 1 2.8
012 type 1.25 3.6
015 type 1.7 4.5
018 type 2 5.6
024 type 2.5 7.1
027 type 3 8.0
030 type 3.2 9.0

1)

048 type 5 14.0 16.0
007 type 0.8 2.2
009 type 1 2.8
012 type 1.25 3.6
015 type 1.7 4.5
018 type 2 5.6
024 type 2.5 7.1
007 type 0.8 2.2
009 type 1 2.8
012 type 1.25 3.6
015 type 1.7 4.5
018 type 2 5.6
024 type 2.5 7.1
027 type 3 8.0
030 type 3.2 9.0
036 type 4 11.2
048 type 5 14.0
056 type 6 16.0
018 type 2 5.6
024 type 2.5 7.1
027 type 3 8.0
036 type 4 11.2
048 type 5 14.0
015 type 1.7 4.5
018 type 2 5.6
024 type 2.5 7.1
027 type 3 8.0
036 type 4 11.2
048 type 5 14.0
007 type 0.8 2.2
009 type 1 2.8
012 type 1.25 3.6
015 type 1.7 4.5
018 type 2 5.6
024 type 2.5 7.1
007 type 0.8 2.2
009 type 1 2.8
012 type 1.25 3.6
015 type 1.7 4.5
018 type 2 5.6
024 type 2.5 7.1
007 type 0.8 2.2
009 type 1 2.8
012 type 1.25 3.6
015 type 1.7 4.5
018 type 2 5.6
024 type 2.5 7.1
015 type 1.7 4.5
018 type 2 5.6
024 type 2.5 7.1
027 type 3 8.0
036 type 4 11.2
048 type 5 14.0
056 type 6 16.0

4-way Air Discharge
Cassette Type

2-way Air Discharge
Cassette Type

1-way Air Discharge
Cassette Type

Concealed Duct
Standard Type

Concealed Duct
High Static
Pressure Type

Under Ceiling Type

High Wall Type

Floor Standing
Cabinet Type

Floor Standing
Concealed Type

Floor Standing Ty pe

MMU-AP0091H
MMU-AP0121H
MMU-AP0151H
MMU-AP0181H
MMU-AP0241H
MMU-AP0271H
MMU-AP0301H
MMU-AP0361H
MMU-AP0481H
MMU-AP0561H
MMU-AP0071WH
MMU-AP0091WH
MMU-AP0121WH
MMU-AP0151WH
MMU-AP0181WH
MMU-AP0241WH
MMU-AP0271WH
MMU-AP0301WH
MMU-AP0481WH*
MMU-AP0071YH
MMU-AP0091YH
MMU-AP0121YH
MMU-AP0151SH
MMU-AP0181SH
MMU-AP0241SH
MMD-AP0071BH
MMD-AP0091BH
MMD-AP0121BH
MMD-AP0151BH
MMD-AP0181BH
MMD-AP0241BH
MMD-AP0271BH
MMD-AP0301BH
MMD-AP0361BH
MMD-AP0481BH
MMD-AP0561BH
MMD-AP0181H
MMD-AP0241H
MMD-AP0271H
MMD-AP0361H
MMD-AP0481H
MMC-AP0151H
MMC-AP0181H
MMC-AP0241H
MMC-AP0271H
MMC-AP0361H
MMC-AP0481H
MMK-AP0071H
MMK-AP0091H
MMK-AP0121H
MMK-AP0151H
MMK-AP0181H
MMK-AP0241H
MML-AP0071H
MML-AP0091H
MML-AP0121H
MML-AP0151H
MML-AP0181H
MML-AP0241H
MML-AP0071BH
MML-AP0091BH
MML-AP0121BH
MML-AP0151BH
MML-AP0181BH
MML-AP0241BH
MMF-AP0151H
MMF-AP0181H
MMF-AP0241H
MMF-AP0271H
MMF-AP0361H
MMF-AP0481H
MMF-AP0561H

*1) China only

Cooling

capacity (kW)

Heating

capacity (kW)

3.2

4.0

5.0

6.3

8.0

9.0

10.0

12.5

16.0

18.0

2.5

3.2

4.0

5.0

6.3

8.0

9.0

10.0

2.5

3.2

4.0

5.0

6.3

8.0

2.5

3.2

4.0

5.0

6.3

8.0

9.0

10.0

12.5

16.0

18.0

6.3

8.0

9.0

12.5

16.0

5.0

6.3

8.0

9.0

12.5

16.0

2.5

3.2

4.0

5.0

6.3

8.0

2.5

3.2

4.0

5.0

6.3

8.0

2.5

3.2

4.0

5.0

6.3

8.0

5.0

6.3

8.0

9.0

12.5

16.0

18.0

6

Tools

Required Tools

The used refrigerating oil is changed, and mixing of oil may cause a trouble such as generation of sludge,
clogging of capillary, etc. Accordingly, the tools to be used are classified into the following three types.

(1) Tools exclusive for R410A (Those which cannot be used for conventional refrigerant (R22))
(2) Tools exclusive for R410A, but can be also used for conventional refrigerant (R22)
(3) Tools commonly used for R410A and for conventional refrigerant (R22)
The table below shows the tools exclusive for R410A and their interchangeability.

Tools exclusive for R410A (The following tools for R410A are required.)

Tools whose specifications are changed for R410A and their interchangeability

Conventional air

conditioner installation

Whether new equipment
can be used with
conventional refrigerant

¡

*(Note 1)

×
×

¡

¡

×

¡

×

No.

















Used tool

Flare tool
Copper pipe gauge for

adjusting projection
margin

Torque wrench
Gauge manifold
Charge hose

Vacuum pump adapter
Electronic balance for

refrigerant charging
Refrigerant cylinder
Leakage detector
Charging cylinder

Usage

Pipe flaring
Flaring by conventional

flare tool

Connection of flare nut

Evacuating, refrigerant
charge, run check, etc.

Vacuum evacuating
Refrigerant charge
Refrigerant charge

Gas leakage check
Refrigerant charge

air conditioner installation

Existence of
new equipment
for R410A

Yes

Yes

Yes

Yes

Yes
Yes
Yes

Yes

(Note 2)

R410A

Whether conventional
equipment can be
used

*(Note 1)

*(Note 1)

×
×

×

Yes

×
×
×

(Note 1) When flaring is carried out for R410A using the conventional flare tools, adjustment of projection

margin is necessary. For this adjustment, a copper pipe gauge, etc. are necessary.

(Note 2) Charging cylinder for R410A is being currently developed.

General tools (Conventional tools can be used.)

In addition to the above exclusive tools, the following equipments which serve also for R22 are necessary
as the general tools.

(1) Vacuum pump

Use vacuum pump by

attaching vacuum pump adapter.
(2) Torque wrench
(3) Pipe cutter

(4) Reamer
(5) Pipe bender
(6) Level vial
(7) Screwdriver (+, –)
(8) Spanner or Monkey wrench

(9) Hole core drill
(10) Hexagon wrench

(Opposite side 4mm)
(11) Tape measure
(12) Metal saw

Also prepare the following equipments for other installation method and run check.
(1) Clamp meter
(2) Thermometer

(3) Insulation resistance tester
(4) Electroscope

7

2. SAFETY NOTES

• Ensure that all Local, National and International regulations are satisfied.

• Read this “SAFETY NOTES” carefully before Installation.

• The precautions described below include the important items regarding safety. Observe them without fail.

• After the installation work, perform a trial operation to check for any problem.
Follow the Owner’s Manual to explain how to use and maintain the unit to the customer.

• Turn off the main power supply switch (or breaker) before the unit maintenance.

• Ask the customer to keep the Installation Manual together with the Owner’s Manual.

WARNING

• Ask an authorized dealer or qualified installation professional to install/maintain the air

conditioner.

Inappropriate installation may result in water leakage, electric shock or fire.

• Turn off the main power supply switch or breaker before attempting any electrical work.

Make sure all power switches are off. Failure to do so may cause electric shock.

• Connect the connecting wire correctly.

If the connecting wire is connected in a wrong way, electric parts may be damaged.

• When moving the air conditioner for the installation into another place, be very careful not to enter

any gaseous matter other than the specified refrigerant into the refrigeration cycle.

If air or any other gas is mixed in the refrigerant, the gas pressure in the refrigeration cycle becomes abnormally
high and it as a result causes pipe burst and injuries on persons.

• Do not modify this unit by removing any of the safety guards or by by-passing any of the safety

interlock switches.

• Exposure of unit to water or other moisture before installation may cause a short-circuit of

electrical parts.

Do not store it in a wet basement or expose to rain or water.

• After unpacking the unit, examine it carefully if there are possible damage.

• Do not install in a place that might increase the vibration of the unit.

• To avoid personal injury (with sharp edges), be careful when handling parts.

• Perform installation work properly according to the Installation Manual.

Inappropriate installation may result in water leakage, electric shock or fire.

• When the air conditioner is installed in a small room, provide appropriate measures to ensure that

the concentration of refrigerant leakage occur in the room does not exceed the critical level.

• Install the air conditioner securely in a location where the base can sustain the weight adequately.

• Perform the specified installation work to guard against an earthquake.

If the air conditioner is not installed appropriately, accidents may occur due to the falling unit.

• 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 generate.

• 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 might
generate.

• Electrical work must be performed by a qualified electrician in accordance with the Installation

Manual. Make sure the air conditioner uses an exclusive power supply.

An insufficient power supply capacity or inappropriate installation may cause fire.

• Use the specified wires for wiring connect the terminals securely fix. To prevent external forces

applied to the terminals from affecting the terminals.

• Conform to the regulations of the local electric company when wiring the power supply.

Inappropriate grounding may cause electric shock.

• 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.

8

3. CHECK POINTS

Check before operation

• Turn on the main power switch 12 hours or more before starting the operation.

• Check whether earth wire is disconnected or out of place.

• Check that air filter is installed to the indoor unit.

Heating capacity

• For heating operation, a heat pump type which absorbs the outdoor heat and deliver the heat in the room is adopted.
If the outdoor temperature lowers, the heating capacity decreases.

• When the outdoor temperature is low, common use with other heating devices is recommended.

Defrost operation in heating operation

• If frost is found on the outdoor unit during heating operation, the defrost operation starts automatically (for approx. 2 to 10
minutes) so as to increase the heating effect.

• During defrost operation, the fans of both indoor and outdoor units stop.

Protection for 3 minutes

• The outdoor unit does not operate for approx. 3 minutes after air conditioner has been immediately restarted after stop, or
power switch has been turned on. This is to protect the system.

Main power failure

• If a power failure occurs during operation, all operations stop.

• When the power is turned on after power failure, the operation lamp of the remote controller flashes to notify.

• When restarting the operation, push ON/OFF button again.

Fan rotation of stopped unit

• While other indoor units operate, the fan on indoor units on “stand-by” rotates to protect the machine once per approx. 1
hour for several minutes.

Protective device (High pressure switch)

The high pressure switch operate the air conditioner automatically stops when excessive load is applied to the air
conditioner. If the protective device works, the operation lamp keeps lit but the operation stops.
When the protective device works, “CHECK” characters in the remote controller display section flash.
The protective device may work in the following cases.

Cooling

• When air inlet or outlet of the outdoor unit is closed.

• When strong wind blows continuously against air outlet of the outdoor unit.

Heating

• When much dust or dirt is excessively adhered to air filter of the indoor unit.

• When air outlet of the indoor unit is blocked.

NOTE

If the protective device works, turn off the main power switch, remove the cause, and then restart the operation.

Cooling/ heating operation of Multi system air conditioner

• When COOL or HEAT mode is fixed by the manager of the air conditioner, other operation than the set mode is
unavailable. If other operation than the set mode has been performed, [
operation part goes on and the operation stops.

Operating temperature of Super HRM

• When outdoor temperature goes out of specified range, “ or ” mark is indicated on the remote controller display and
required operation will stop. “

[Notice]

• This indication is not failure.

• When outdoor temperature goes back to specified range, “

• Operation stops because concurrent operation can not be kept in the condition of out of specification for Super HRM.

(Outdoor temp. (DB) < –5°C : Cooling, > 21°C : Heating)

• Do not use “Super HRM” for other than personal usage where the ambient temperature may go down below –5°C.

(For example, OA equipment/Electric device/Food/Animals and plants/Art object)

& ” : When heating operation. “ ” : When cooling operation.

or ” disappear and start normal operation.

Characteristics of heating operation

• Air does not blow out immediately after start of the operation. When the indoor heat exchanger has been heated after 3 to
5 minutes passed (differs according to temperature of indoor/outdoor temperature), hot air starts blowing.

• During operation, the outdoor unit may stop when outdoor temperature becomes high.

• When other indoor unit performs heating operation during fan operation, fan operation may be stopped temporarily to

prevent discharge of hot air.

9

PRE-HEAT] or [ Operation ready] on the

4.

g

KEY POINTS OF AIR CONDITIONER INSTALLATION

In order to prevent problems before they arise, carefully read (1) the Installation Manual provided with the
equipment, and (2) the Owner’s Manual before installing the air conditioner.

4-1. Flow of Air Conditioner Installation Work

[Step] [Key Points]

(Prior to Installation)

Determination of extent of installation work

Drafting of diagrams

(Installation)

Sleeve/insert installation

Indoor unit and flow selector unit installation

Refrigerant pipe installation

(to outdoor outlet)

Drain pipe installation

Duct installation

Insulation work

Clearly determine the extent of the installation work.
Draft :

• Control wiring system diagram

• Refrigerant line system diagram

• Power wiring system diagram

Pay careful attention to the downward slope of the drain pipe.
Be sure to check the name of the model in order to avoid any

installation mistakes. If the model has an installation pattern, attach
the pattern to the ceiling to mark the position of the ceiling openings
and to keep dust away.

Make sure that the pipe system is dry, clean, and airtight.
When brazing pipes, blow out the system with nitrogen gas.

Do not forget the system indications.

Pipes should have downward slope (of at least 1/100).
Make sure the duct is lar

Be careful not to make any errors in the external static pressure
calculations.

Be especially careful to close off all gaps where connections are m ade
to the indoor unit, and at joints in the branching kit. Do not forget the
drain pipes.

e enough to carry the desired volume of air.

Use two-core shielded wires for the control wires, and use separate

(control wires and power wires)

Electrical work

Various s witc h setting s

Outdoor unit base installation

Outdoor unit installation

Outside circulation, refrigerant pipe instal lation

Gas-leak test

Vacuum suction

Addition of refrigerant

Ceiling panel installation

Test operation and adjustment

Owner’s Manual transfer

power supplies for the indoor and outdoor units. For connecting the
flow selector unit, be sure to use the attached cable or connection
cable kit sold separately.

Set the switches correctly, as indicated in the control wiring system
diagram.

Make sure that the base is level.
Provide for adequate air flow and service space around the outdoor

unit. Indicate the system names clearly.
From outside outlet to outdoor unit.
In the final test, the system must be pressurized at 3.73MPa

(38kg/cm²G) for 24 hours with no decrease in pressure.
Use a vacuum pump with reverse flaw prevention adaptor with a large

output volume and that can achieve a high level of vacuum.
Record the amount of refrigerant that was added to the system on

both the outdoor unit and on the pre-test operation checklist.
Make sure that the ceiling panel is attached to the ceiling material

tightly, with no gaps.
Operate the indoor units one by one, making sure that all wiring and

pipes are connected correctly, and fill out the checklist.
Explain how to operate the system clearly and concisely.

The procedure described above presents only the general sequence of steps; the sequence of steps may have
to be altered according to the circumstances of any specific installation job.

10

5. REFRIGERANT PIPE INSTALLATION

5-1. Work Procedure

Indoor unit
installation

Sizing

the pipes

Preliminary

installation

Nitrogen gas blow

Flaring

Flushing

Brazing

Leak test

5-2. Three Principles of Refrigerant Pipes

<Observe the three principles of refrigerant pipes>

Causes of Problems Preventing Problems

• Moisture (in the form of

Dry

Clean

rainwater or water used during
installation, for example)
getting inside of the pipes

• Moisture from condensation
forming or seeping into the pipes

• Oxidation inside pipes during
brazing

• Dirt, dust, or foreign matter
getting inside pipes

Careful

handling

of pipes

Nitrogen gas blow

Careful handling of pipes

Flushing

Vacuum

suction

Vacuum

suction

Flushing

Use of suitable materials

(copper pipes, solder, etc.)

Air-

tight

• Poor brazing

• Poor flaring

Perform basic work

of brazing carefully

Perform basic work

of flaring carefully

<Three principles of refrigerant pipes>

Dry

Make sure there is no moisture

inside of the pipes

Moisture

Make sure there is no dirt

Clean Airtight

Make sure the refrigerant

inside of the pipes

Dirt

Not good Not good Not good

Leak test

does not leak

Leak

11

5-3. Selecting the Refrigerant Line Material

q

q

• Refrigerant pipes

• Material: Phosphoric deoxidized seam-less pipe

• Capacity code of outdoor unit / indoor unit

• For each indoor unit, the capacity code is determined for every capacity rank.

• For each outdoor unit, the capacity code is determined for every capacity rank. The Max. number of the

connectable indoor units and the total capacity code value of the indoor units are also determined.
Against the capacity code of the outdoor unit, the total capacity codes of the connectable indoor units differ

 

according to the height difference between indoor units.

 
 

• When the height difference between indoor units is 15m or less : Up to 135%* of capacity code of outdoor unit

 

(* For 12HP system, up to 120%.)

 

• When the height difference between indoor units is 15m or more : Up to 105% of capacity code of outdoor unit

 

Table 1 Table 2

Indoor unit

capacity rank

007 type 0.8 2.2

009 type 1 2.8

012 type 1.25 3.6

015 type 1.7 4.5

018 type 2 5.6

024 type 2.5 7.1

027 type 3 8

030 type 3.2 9

036 type 4 11.2

048 type 5 14

056 type 6 16

Capacity code

E

uivalent toHPEquivalent to

capacity

Outdoor unit

model name

MMY-MAP0801FT8 8 22.4 13 5.6 15.7 10.8 30.2

MMY-MAP1001FT8 10 28.0 16 7.0 19.6 13.5 37.8

MMY-MAP1201FT8 12 33.5 16 8.4 23.5 14.4 40.3

Capacity code

E

uivalent toHPEquivalent to

capacity

No. of

indoor units

Total capacity code of connectable indoor units

Min Max.

Equivalent

to HP

Equivalent
to capacity

Equivalent

to HP

Table 3

No. Piping parts Name Selection of pipe size Remarks



Outdoor unit

↓

1st branching joint

Outdoor unit
main pipe

1) Connecting pipe outdoor unit

Model name Suction gas side Discharge gas side Liquid side

MMY-MAP0801FT8 Ø22.2 Ø19.1 Ø12.7
MMY-MAP1001 FT8 Ø22.2 Ø19.1 Ø12.7
MMY-MAP1201 FT8 Ø28.6 Ø19.1 Ø12.7

Same to connecting
pipe size of outdoor unit

Equivalent
to capacity



Branching section

Branching pipe

2) Pipe size betw een branching sections

Pipe size differs based
on total capacity code

↓

Branching section

Total capacity codes of indoor units

at downstream side

Equivalent to

capacity

Below 18.0 Below 6.4 Ø15.9 Ø12.7 Ø9.5

18.0 to below 34.0 6.4 to below 12.2 Ø22.2 Ø19.1 Ø12.7

34.0 to below 45.5 12.2 to below 16.2 Ø28.6 Ø22.2 Ø15.9

∗

If exceeding the main pipe size, decide the size same to main pipe

Equivalent

to HP

Suction

gas side

Discharge

gas side

Liquid side

value of indoor units at
downstream side.

If the total value
exceeds the capacity
code of the outdoor unit,
apply capacity code of
the outdoor unit.
(See tables 1 and 2.)

size.

∗

When two pipes are used for the circuits exclusive to cooling, use
pipes at liquid and suction gas sides.

12

No. Piping parts Name Selection of pipe size

g

g



End branching
section

↓

Flow selector unit



Branching section
or flow selector
unit

↓

Indoor unit



Branching section

Connecting pipe
of flow selector
unit

Connecting pipe
of indoor unit

Branchin

header
of Y-shape
branching joint

3) Pipe size between end branching section and flow selector unit

To tal capac ity codes of indoo r units

at downstream side

Equivale nt to capacity Equivalent to HP

Below 4.5 Below 1.7 Ø12.7 Ø9.5 Ø6.4

4.5 to below 18.0 1.7 to below 6.4 Ø15.9 Ø12.7 Ø9.5

Suction

gas side

Discharge

gas side

Liquid side

4) Connecting pipe size of indoor unit

Capacity rank Gas side Liqu id side

007 to 012 type

∗

When pipe len

Real length: Below 15m Ø9.5

Real length: Over 15m
015 to 018 type Ø12.7
024 to 056 type Ø15.9 Ø9.5

∗

Ø12.7

Ø6.4

th between the end branching section and cooling-only indoor unit exceeds 15m,

decide pipe size at gas side to the bigger one with Ø12.7.

5) Selection of branching joint/header

To tal capac ity codes of indoo r units Model name RBM-

Equivalent to

capacity

Y-shape branching joint

∗

1, 2

Branching header

∗

1, 2, 3

∗

1 For branching pipe of the 1st branching section, select one by the outdoor unit capacity code.

∗

2 When total capacity codes of indoor units exceed capacity code of outdoor unit, select one by

Below 18.0 Below 6.4 BY53FE BY53E

18.0 to below 40.0 6.4 to below 14.2 BY103FE BY103E
Below 40.0 Below 14.2 HY1043 FE HY1043E
Below 40.0 Below 14.2 HY1083 FE HY1083E

Equivalent to HP

For 3

pipes piping

For 2

pipes piping

capacity code of outdoor unit.

∗

3 1 line after header branching is connectable up to total maximum capacity codes 6.0

(Equivalent to HP).



Branching Flow selector unit

Outdoor unit

1 Main piping

1st branching

section

6) Selection of flow selector unit

Model name Capacity rank of connectable indoor unit

RBM-Y1121FE 007 to 030 type
RBM-Y1801FE 036 to 056 type

∗

Confirm also Installation Manual of flow selector unit.

(Liquld,discharge gas,suction gas)

3 piping

Outdoor unit to FS unit

2

3

6 6 6

FS unit

2

4 4 4 4 4

Indoor unit

2 2 2

5 Header branching

3

5 Y-shape branching joint

2

3

FS unit to indoor unit
Branching section indoor unit

< Cooling only > < Cooling only >

2 piping

(Liquld, gas pipe)

3 3 3

6 6 6

FS unit

4 4 4 4 4

Indoor unit

< Cooling only > < Cooling only >

13

5-4. Allowable Length/Height Difference of Refrigerant Piping

Height difference between outdoor
and indoor units
H1

50m

1st branching
section

Main
piping

Outdoor unit

L1

• System restrictions

∗ For 12HP system, up to 120%

Branching

Branching piping L2

Connecting piping of indoor unit

L3

FS unit

a

ghi j

Indoor unit

Equivalent length corresponded to farthest piping L 125m

Equivalent length corresponded to farthest piping after 1st branching Li 50m

L4 L5 L6

def

lmn

header

L7

bc

FS unit

Max. capacity of
combined indoor unit

k

< Cooling only >

o

< Cooling only >

< Cooling only >

p

< Cooling only >

H2 ≤ 15m
H2 > 15m

Height difference between
indoor units

35m

H2

135%
105%

• Allowable length and height difference of refrigerant piping

Allowable value Piping section

Total extension of pipe (Liquid pipe, real length) 250 m

Pipe
Length

Height
difference

1 The farthest indoor unit from the 1st Branch to be named as (p).

*

2 Attached connection cable can be used up to 5 m in pipe length between indoor and FS unit. When the pipe length

*

Farthest piping length L (*1)

Max. equivalent length of main piping 85 m L1
Equivalent length of farthest piping from 1st branching Li (*1) 50 m L3 + L4 + L5 + L6 + p
Max. real length of indoor unit connecting piping 30 m a + g, b + h, c + l, d + l, e + m, f + n, j, k, o, p
Max. real length between FS unit and indoor unit (

Height between indoor
and outdoor units H1

Height between indoor units H2

Real length 100 m
Equivalent length 125 m

2) 15 m g, h, i, l, m, n
Upper outdoor unit 50 m ——
Lower outdoor unit 30 m ——
Upper outdoor unit 35 m ——
Lower outdoor unit 15 m ——

*

between indoor and FS unit exceeds 5 m, be sure to use the connection cable kit (RBC-CBK15FE). (Sold separately)

FS unit

L1 + L2 + L3 + L4+ L5 + L6 + L7 + a + b + c +

d + e + f + g + h + i + j + k + l + m + n + o + p

L1 + L3 + L4 + L5 + L6 + p

FS unit

Indoor unit Indoor unit

[NOTE] :

Don’t connect two or more indoor units to one FS unit. Arrange one indoor unit and one FS unit set to 1 by 1.

14

• Brazed couplings and special branches

• Use suitable parts for typical elbow couplings and socket couplings.
(Consider the size, material, thickness, etc.)

• Special branches

Use deoxidized parts sold separately.

Branching at indoor unit side

Branch header

Branching jo int

4 branching 8 branching

RBM-BY53E
RBM-BY103E
RBM-BY53FE

RBM-BY103FE

RBM-HY1043E

RBM-HY1043FE

RBM-HY1083E

RBM-HY1083FE

• Solder

Because only “copper-to-copper” connections are made in the multi type air conditioning system, use the hard
solder “phosphor copper solder.”

15

5-5. Careful Handling

Careful handling is the most important step in preventing moisture, dirt, and dust from getting inside of the pipes.
Moisture in pipes has caused major problems in numerous instances in the past. Therefore, it is important to be
as careful as possible in order to prevent problems before they occur.

Pipe delivery and storage

When pipes are delivered, care should be taken to prevent it from becoming bent or deformed, and the ends of
the pipes should be capped in order to prevent dirt, mud, rain, etc., from getting inside. Build a wooden frame to
hold the pipes securely, and store the pipes in the specified location.

Delivery of copper pipes without caps to a work site is not acceptable.

Cap

Frame for careful handling

and to prevent rolling

Careful handling on a pallet

Pipe caps

The ends of all pipes must be sealed. The most reliable method is the “pinch method,” but the taping method
can be selected in some circumstances.

Location

Outdoors

Indoors

Time for installation

One month or more

Less than one month

Does not matter

Careful handling method

Pinch method
Pinch or taping method
Pinch or taping method

n Pinch method

Pinch the end of the copper pipe closed,
and braze any opening closed.

Copper pipe

Solder

Braze here

n Taping method

Cover the end of the copper pipe with vinyl tape.

[Taping method]

Opening

Copper
pipe

Vinyl tape

Flatten

Fold over

Tape again

16

CAUTIONS

1) Do not allow dirt or moisture
inside of the pipes.

• Keep the open ends of all pipes

capped until all pipes have been
connected.

• Pipe openings should face

horizontally or downwards if at all
possible.

GOOD NOT GOOD

Dirt and moisture get inside

Cap

Pipe

2) When passing a pipe through an

opening in a wall, always keep
the end of the pipe capped.

3) Do not place pipes directly on
the ground. Do not scrape pipes
on the ground.

4) When deflashing (removing
burrs from) a pipe, point the
opening downwards so that no
scraps fall inside of the pipe.

5) When installing pipes on a rainy
day, always keep the ends of the
pipes capped.

Cap or

Wall

plastic bag

Rubber band

Rubber

Cap or

band

plastic bag

Do not allow
pipe to touch
ground

Ground Ground

Pipe

Burrs

Deflasher

Cap or
plastic bag

Rubber
band

Rain

Wall

Dirt gets inside of pipe

Scraps get inside of pipe

Rain

Particles of
the wall get
inside the pipe

Rain gets
inside of pipe

17

5-6. Parts of Branching Header/Joint

Branching Header : RBM-HY1043E / HY1083E
Branching Joint : RBM-BY53E / BY103E

• Check the following parts in the package.

• For piping material and size of the refrigerant pipes, refer to the Installation Manual of the Air Conditioner.

NOTE : 1. All dimensions are in millimeters. In the following tables, ( ) indicates diameter of the indicated position, and

others indicate diameter of the connecting pipe.

2. Please connect pipe to the side with a projection of the socket.

( 51 , 52 , 54 , 58 , 59 , 61 , 62 , 70 , 89 : without projection)

Diameter of the
connecting pipe

projection

socket

NAME

MODEL

Branching header
gas side

Branching header
liquid side

Heat insulator
(gas side/liquid side)

side

diameter of the
connected pipe

Gas

Branching Header

Socket

Outlet sealed pipe at gas side
Header sealed pipe at liquid side

Outlet sealed pipe at liquid side

external diameter
of socket

side

Liquid

No.

Ø15.9 x (Ø22.2) 1pc

14

Ø19.1 x (Ø22.2) 1pc

18

Ø28.6 x (Ø22.2) 1pc

70

( )

06

Ø12.7 x (Ø15.9) 1pc

09

Ø15.9

Ø15.9

Ø9.5

Ø22.2

No.

Ø 9.5 x (Ø15.9) 4pcs

06

Ø12.7 x (Ø15.9) 4pcs

09

Ø 6.4 x (Ø 9.5) 4pcs01Ø 9.5 x (Ø15.9) 1pc

(Ø15.9) 1pc
(Ø15.9) 1pc

(Ø 9.5) 1pc

1pc

1pc

1pc each

Ø15.9

Ø9.5

Ø15.9

No.

Ø15.9 x (Ø22.2) 1pc

14

Ø19.1 x (Ø22.2) 1pc

18

Ø28.6 x (Ø22.2) 1pc

70

06

Ø12.7 x (Ø15.9) 1ps

09

RBM-HY1083ERBM-HY1043E

Ø22.2

No.

Ø 9.5 x (Ø15.9) 8pcs

06

Ø12.7 x (Ø15.9) 8pcs

09

Ø 6.4 x (Ø 9.5) 8pcs01Ø 9.5 x (Ø15.9) 1ps

1pc

1pc

1pc each

(Ø15.9) 3pcs
(Ø15.9) 1pc

(Ø 9.5) 3pcs

NAME

Branching joint
gas side

Branching joint
liquid side

Heat insulator
(gas side/liquid side)

Branching Joint

diameter of the
connected pipe

Gas side

Socket

external diameter
of socket

Liquid side

MODEL

( )

Ø12.7

No.

Ø12.7 x (Ø15.9) 1pc

09

Ø19.1 x (Ø15.9) 1pc

51

RBM-BY53E

Ø12.7

Ø15.9

Ø12.7

Ø9.5
Ø9.5

No.

05
54

1pc

1pc

1pc each

Ø 9.5 x (Ø12.7) 2pcs
Ø15.9 x (Ø12.7) 2pcs

Ø 6.4 x (Ø 9.5) 2pcs01Ø 9.5 x (Ø12.7) 1pc05

Ø15.9

No.

Ø19.1 x (Ø22.2) 1pc

18

Ø28.6 x (Ø22.2) 1pc

70

Ø 9.5 x (Ø15.9) 1pc

06

Ø12.7 x (Ø15.9) 1pc

09

RBM-BY103E

Ø19.1

Ø22.2

Ø19.1

Ø12.7

Ø12.7

No.

Ø 9.5 x (Ø19.1) 1pc

07

Ø12.7 x (Ø19.1) 1pc

10

Ø15.9 x (Ø19.1) 2pcs

13

Ø22.2 x (Ø19.1) 2pcs

52

Ø28.6 x (Ø19.1) 1pc

89

Ø 6.4 x (Ø12.7) 1pc

02

Ø 9.5 x (Ø12.7) 2pcs

05

Ø15.9 x (Ø12.7) 1pc

54

1pc

1pc

1pc each

18

Branching Header : RBM-HY1043FE / HY1083FE
Branching Joint : RBM-BY53FE / BY103FE

• Check the following parts in the package.

• For piping material and size of the refrigerant pipes, refer to the Installation Manual of the Air Conditioner.

NOTE : 1. All dimensions are in millimeters. In the following tables, ( ) indicates diameter of the indicated position, and

others indicate diameter of the connecting pipe.

2. Please connect pipe to the side with a projection of the socket.

( 52 , 54 , 70 , 89 : without projection)

Diameter of the
connecting pipe

projection

socket

NAME

MODEL

Suction gas side

Discharge gas side

Liquid side

Heat insulator
(suction gas side/
discharge gas side/liquid side)

Socket

Suction
gas side

Discharge
gas side

Branching Header

Liquid
side

Outlet sealed pipe at suction gas side
Outlet sealed pipe at discharge gas side

Outlet sealed pipe at liquid side
Header sealed pipe at liquid side

diameter of the
connected pipe

external
diameter
of socket

No. No. No. No.

14
70

85

( )

18
06

09

Ø22.2

Ø22.2

Ø15.9

Ø15.9 x (Ø22.2) 1pc
Ø28.6 x (Ø22.2) 1pc

Ø12.7 x (Ø22.2) 1pc
Ø19.1 x (Ø22.2) 1pc

Ø 9.5 x (Ø15.9) 1pc
Ø12.7 x (Ø15.9) 1pc

Ø15.9

Ø15.9

Ø9.5

Ø15.9

06

Ø 9.5 x (Ø15.9) 3pcs

09

Ø12.7 x (Ø15.9) 4pcs

06

Ø 9.5 x (Ø15.9) 4pcs

09

Ø12.7 x (Ø15.9) 4pcs

01

Ø 6.4 x (Ø 9.5) 4pcs

(Ø15.9) 1pc
(Ø15.9) 3pcs

(Ø 9.5) 1pc
(Ø15.9) 1pc

RBM-HY1083FERBM-HY1043FE

Ø22.2

1pc 1pc

Ø22.2

1pc 1pc

Ø15.9

1pc 1pc

1pc each 1pc each

14

Ø15.9 x (Ø22.2) 1pc

70

Ø28.6 x (Ø22.2) 1pc

85

Ø12.7 x (Ø22.2) 1pc

18

Ø19.1 x (Ø22.2) 1pc

06

Ø 9.5 x (Ø15.9) 1pc

09

Ø12.7 x (Ø15.9) 1pc

06
09

06
09

01

Ø15.9

Ø15.9

Ø9.5

Ø15.9

Ø 9.5 x (Ø15.9) 7pcs
Ø12.7 x (Ø15.9) 8pcs

Ø 9.5 x (Ø15.9) 8pcs
Ø12.7 x (Ø15.9) 8pcs

Ø 6.4 x (Ø 9.5) 8pcs

(Ø15.9) 3pcs
(Ø15.9) 7pcs

(Ø 9.5) 3pcs
(Ø15.9) 1pc

NAME

MODEL

Suction gas side

Discharge gas side

Liquid side

Heat insulator
(suction gas side/
discharge gas side/liquid side)

Socket

Suction
gas side

Branching Joint

Discharge
gas side

Liquid
side

diameter of the
connected pipe

( )

external
diameter
of socket

RBM-BY103FERBM-BY53FE

Ø

Ø

15.9

Ø

15.9

Ø

12.7

No. No. No. No.

05
54

09

Ø12.7 x (Ø15.9) 1pc

05

Ø 9.5 x (Ø12.7) 1pc

05
54

01

12.7

Ø

12.7

Ø

12.7

Ø

12.7

Ø

9.5

Ø

9.5

Ø 9.5 x (Ø12.7) 2pcs
Ø15.9 x (Ø12.7) 2pcs

Ø 9.5 x (Ø12.7) 2pcs
Ø15.9 x (Ø12.7) 1pc

Sealed pipe

x (Ø19.1) 1pc

Ø 6.4 x (Ø 9.5) 2pcs

1pc 1pc

1pc 1pc

1pc 1pc

1pc each 1pc each

Ø

22.2

Ø

22.2

Ø

15.9

70

Ø28.6 x (Ø22.2) 1pc

18

Ø19.1 x (Ø22.2) 1pc

09

Ø12.7 x (Ø15.9) 1pc

07
10
13
52
89

10
52

02
05
54

Ø

19.1

Ø

19.1

Ø

19.1

Ø

19.1

Ø

12.7

Ø

12.7

Ø 9.5 x (Ø19.1) 1pc
Ø12.7 x (Ø19.1) 1pc
Ø15.9 x (Ø19.1) 2pcs
Ø22.2 x (Ø19.1) 2pcs
Ø28.6 x (Ø19.1) 1pc

Ø12.7 x (Ø19.1) 2pcs
Ø22.2 x (Ø19.1) 1pc

Sealed pipe

x (Ø19.1) 1pc

Ø 6.4 x (Ø12.7) 1pc
Ø 9.5 x (Ø12.7) 2pcs
Ø15.9 x (Ø12.7) 1pc

19

5-7. Branching Kit Connection Method

[1] Branch joint

<Suction gas/Discharge gas side>

Socket

Pipe in use
on the site

Inlet

To outdoor unit

Socket

Gas side branch joint

Outlet (2)

Outlet (1)

<Liquid side>

Socket

Outlet (1)

Pipe in use
on the site

Inlet

To outdoor unit

Socket

• Installation direction of branch pipe
Install the branching pipes so that it branch either
vertically or horizontally.

Outlet (2)

Gas/Liquid side branch joint

Both directions
are possible.

Pipe in use on the site

To other branching
pipe or indoor unit

Socket

To other branch­ing pipe or indoor
unit

Pipe in use
on the site

Socket

NOTE :

Install the branch pipes horizontally or vertically so
that they branch evenly.

Install the branching joint within ± 15 degrees.

Heat insulating for pipes
(Branching Joint)

• In order to prevent dripping at the place where the
insulation provided with the branching kit meets the
insulating material obtained on the site, butt the two
types of insulation up against each other, and then
wrap the seam between the two types of insulation
in at least 10mm of the insulating material (in use
on the site).

<Suction gas/Discharge gas/Liquid side>

Heat insulator
for piping
(in use on the site)

Heat insulator (in use on the site)
by 10mm or more thickness.

Butt together

150

Branching joint

Heat insulator
in package

Butt together

Heat insulator for piping
(in use on the site)

Butt together

In case of vertical
installation

<Suction gas/Discharge gas/Liquid side>

A

B

(Horizontal line)

(A view)

(Horizontal line)

(B view)

<In case of horizontal installation>

NOTE :

• Install the branch pipes horizontally or vertically so
that they are branched evenly.

• Install the branching joint within ±15 degrees.

Within
± 15

Within
± 15

degrees

degrees

• On the gas-side pipe, use insulation that can
withstand heat of 120°C or higher. For the branch
pipe, either use a commercially available coupling
cover (for T-shape) that is at least 10mm thick, or
else insulate the pipe as shown in the figure at
below.

• After applying insulation as outlined above, tape the
insulation in place.

Taping (in use on the site)

Heat insulator

Heat insulator
(in use on the site)

(in use on the site)

20

[2] Branch header

<Suction gas/Discharge gas side>

Branching Header

Select and install the socket that matches the
diameter of a pipe to be connected to the indoor unit.

<Suction gas/Discharge gas side branch
header>

Pipe in use on the site

To outdoor unit

Socket

Socket

Pipe in use on the site

To indoor unit

<Liquid-side branch header>

Socket

Pipe in use on the site

To outdoor unit

Socket

Pipe in use
on the site

To indoor unit

• If the number of indoor units to be connected is
fewer than the maximum number of units that can
be connected to the branch header, attach a sealed
pipe to the unused connectors.

<Suction gas/Discharge gas side branch
header>

Outlet sealed pipe
(Provided with
branch header)

A

B

<Liquid-side branch header>

Outlet sealed pipe
(Provided with
branch header)

C

• Install the branch header so that it branches
horizontally. It cannot be used in a vertical position.

D

(Horizontal line)

(Horizontal line)

(A view)

(B view)

Within
± 15

Within
± 10

degrees

degrees

<Liquid-side>

(Horizontal line)

(C view)

When arranging the branching header at the liquid
side, attach a header sealed pipe on the sealing side
of the header as shown in the fiqure at below.

Be sure to install the branch pipe downward.
Horizontal viewed from D point should be within ± 10
degrees same as view B.

• Supporting branching header
After applying the insulation, set the hanging metals

as support. (in use on the site).

NOTE :

1. Install the branching header so that it branches

horizontally. It cannot be used in a vertical
position.

2. Do not use T-type pipe for the branching section.

Inlet socket

Pipe in use
on the site

Branching Header

(D view) Sealing side

Within

degrees

± 15

Header sealed pipe

Within
± 10

degrees

CAUTION

1. On the inlet side of a Y-type branch joint or branch header, allow for at least 300mm of straight pipe.

2. A Y-type branch joint can be installed so that it branches either vertically or horizontally; if branching
horizontally, it should be within an angle of ± 15°.

3. A branch header should be installed so that it branches horizontally.

4. Do not use T-type branch joints.

CAUTION

In the multi air conditioning system, because the refrigerant pipes congregate at the rooftop pipeshaft outlet
in the vertical pipeshaft, it is necessary to attach “labels” to each pipe in order to make clear to which system
a given pipe belongs so as to prevent pipes from being connected incorrectly.

21

How to connect “Cooling Only” indoor unit

Branch joint

• When connecting a Cooling Only indoor unit, attach a sealed pipe to the unused connectors of the branching
pipe of discharge gas side.

Suction gas side

* Discharge gas side

Liquid side

∗ Refer to above. There is the method of connecting without using branching joint pipe of discharge gas side.

For details, refer to the Installation Manual of the Air Conditioner.

Connect sealed pipe.

Flow selector unit

Indoor unit
Cooling only

Indoor unit
Heating and Cooling

Branch header

• When connecting a Cooling Only indoor unit, attach a sealed pipe to the unused connectors of the branching
pipe of discharge gas side.

Suction gas side

Connect sealed pipe.

Discharge gas side

Liquid side

Flow selector unit

Indoor unit
Cooling only

Indoor unit
Heating and Cooling

[NOTE]

For cooling only indoor unit in Super-HRM system, item code (DN) setting from the wired remote controller is
necessary. (Refer to the section “13-1.”)

22

5-8. External Dimensions of Branch Connectors

y

y

y

y

y

(Outline drawings are shown on the following pages.)

Branching joints and headers

Model name Usage Appearance

RBM-BY53FE

RBM-BY103FE

Y-shape branching joint (*2)

RBM-BY53E

RBM-BY103E

RBM-HY1043FE

4-branching header (*3)

RBM-HY1043E

RBM-HY1083FE

8-branching header (*3)

RBM-HY1083E

1 If total capacity code value of indoor unit exceeds that of outdoor unit, apply capacity code of outdoor unit.

*

2 When using Y-shape branching joint for 1st branching, select according to capacity code of outdoor unit.

*

3 Max. 6.0 capacity code in total can be connected.

*

4 This is used for branching to “cooling only” indoor unit.

*

5 Model names for outdoor and indoor units described in this guide are shortened because of the space constraint.

*

Indoor unit capacit
Total below 6.4

Indoor unit capacit
Total below 14.2

Indoor unit capacit
Total below 6.4

Indoor unit capacity code
Total below 14.2

Indoor unit capacit
Total below 14.2

Indoor unit capacity code
Total below 14.2

Indoor unit capacit
Total below 14.2

Indoor unit capacity code
Total below 14.2

code

code

code

code

code

For 3 piping

For 2 piping (*4)

For 3 piping

For 2 piping (

For 3 piping

For 2 piping (

4)

*

4)

*

5-9. Nitrogen Gas Blow Method (During Brazing)

• If nitrogen gas is not passed through the pipes during brazing, a film of oxidized material will form on the inner
surfaces of the pipes. The presence of a such a film in the system will adversely affect the operation of the
valves and compressor in the refrigerant system, and will prevent the system from operating normally.

• In order to prevent this from occurring, nitrogen gas is passed through the pipes while brazing is in progress.
This process of replacing the air in the pipes with nitrogen is called the “nitrogen gas blow.”

This is the basic method that is used for brazing work.

CAUTION

1. Nitrogen gas must be used. (Oxygen, carbon dioxide, and fluorocarbons cannot be used.)

2. Always be sure to use a pressure-reducing valve.

Piping

Valve

Hose

Reducing
valve

Nitrogen
gas bomb

Piping at site

Brazing
position

Copper pipe Ø6.4

Valve

Taping

Reducing valve

Pressure
tight hose

Outside

Nitrogen

gas bomb

23

5-10. Brazing Work

1. Brazing work should be performed downwards or

(Recommended brazing)

sideways. Avoid brazing upwards (in order to
avoid incomplete brazing). (Recommendation)

2. Always used the specified piping materials for

liquid pipes and gas pipes, and make sure that

Brazing material

they are installed in the proper direction and at
the proper angle.

3. The “nitrogen gas blow” method should be used

when brazing.

(Direction downward) (Direction upward)

Lateral direction

Brazing
material

Brazing
material

CAUTIONS

1. Pay attention to fire prevention concerns. (Take preventative measures in the area where brazing work is

to be performed, such as keeping a fire extinguisher or water handy.)

2. Be careful not to burn yourself.

3. Make sure that any gaps between pipes and couplings are appropriate. (Do not miss brazing any joints.)

4. Make sure that pipes are adequately supported.

• The following table provides basic guidelines for the interval between supports for horizontal copper pipe.

Coupling size of brazed pipe

Connected section

External size Internal size

K

ØC

G

ØF

Interval between supports for copper pipe

Nominal dia.

Max. interval (m)

• Avoid securing copper pipes with metal brackets
directly.

20 or less 25 to 40

1.0 1.5

(Unit: mm)

Connected section

Standard outer dia. of

connected copper pipe

6.35

9.52

12.70

15.88

19.05

22.22

28.58

External size Internal size

Standard outer dia. (Allowable difference)

CF

6.35 (±0.03) 6.45 ( )

9.52 (±0.03) 9.62 ( )

12.70 (±0.03) 12.81 ( )

15.88 (±0.03) 16.00 ( )

19.05 (±0.03) 19.19 ( )

22.22 (±0.03) 22.36 ( )

28.58 (±0.04) 28.75 ( )

+0.04
–0.02

+0.04
–0.02

+0.04
–0.02

+0.04
–0.02

+0.03
–0.03

+0.03
–0.03

+0.06
–0.02

Min. depth

of insertion

KG

76
87
98

98
11 10
11 10
13 12

Oval value

0.06 or less

0.08 or less

0.10 or less

0.13 or less

0.15 or less

0.16 or less

0.20 or less

Min. thickness

of coupling

0.50

0.60

0.70

0.80

0.80

0.82

1.00

∗ Gas brazing of refrigerant pipes must be performed by personnel qualified to do so under local ordinances.

Minmum wall thickness for R410A application

Soft (Coil)

¡
¡
¡
¡

NG
NG
NG

Hard or Half hard

¡
¡
¡
¡
¡
¡
¡

OD (Inch)

1/4
3/8
1/2
5/8
3/4
7/8

1.1/8

OD (mm)

6.35

9.52

12.70

15.88

19.05

22.20

28.58

Minium wall thickness

0.80

0.80

0.80

1.00

1.00

1.00

1.00

24

5-11. Flare Processing

Flare processing procedure

Parts and material : Copper pipe, flare nut. Flare nut shallbe of attached on the indoor unit or R410A exclusive.
Tools : Flare tool (“Rigid” type), reamer, pipe cutter

Work procedure

Straighten the coiled copper pipe.

Cut the pipe with the pipe cutter.

Use the reamer to remove burrs
from the cut surface of the pipe.

Pipe

Burr

Deburring

Key point

Uncoil the pipe.

1. Position the blade of the cutter
so that it will cut the pipe at a
perpendicular angle.

2. Rotate the pipe cutter to the
left to cut the pipe.

3. Move the pipe cutter slowly.

1 . Keep the opening of the pipe

facing downwards.

2. Be careful not to scratch the
inner surface of the pipe.

(Reason)

• It is difficult to cut the coiled pipe
correctly, which increases the
chance of failure.

• The cut surface will be at an
angle.

• The cutter will bite too tightly.

• The copper pipe will be

deformed.

• Scraps will get inside of the
pipe.

• A gas leak could result.

Clear out the inside of the pipe by
tapping on the end with a
screwdriver.

Insert the flare nut.

Make sure that all scraps of metal
are out of the tube by lightly
tapping on the tube while the
opening is pointing down.

Be certain to insert the flare nut
before beginning the flare
process.

25

• Metal scraps in the tube can
damage the compressor.

• If the scraps adhere to the
flared region, a gas leak may
result.

• The flare nut will not fit inside
the copper pipe after the flare
process.

Work procedure

Key point

(Reason)

Attach the (“Rigid”)
flare tool to the
copper pipe.

Align the punch.
(Align the arrow with
the line adjacent to
the next hole.)

1. Make sure that the
inner surfaces of the
flare tool are clean.

2. Determine the
dimensions of the
copper pipe in
accordance with the
flare tool.

45˚

A

Flare tool

Copper pipe

Align the arrow on the
punch with the
prescribed position on
the flare tool.

• The copper pipe will slip out while the flaring process is in
progress.

• The flared dimensions vary.

Dimensions to end of copper tube when flared with one tool
surface

• Projection margin in flaring : A (Unit : mm)

Rigid (Clutch type)

Outer dia. of
copper pipe

6.4

9.5

12.7

15.9

R410A tool used

R410A R22
0 t o 0 .5 (Same as left)
0 t o 0 .5 (Same as left)
0 t o 0 .5 (Same as left)
0 t o 0 .5 (Same as left)

Conventional tool used

R410A R22

1.0 to 1.5 0.5 to 1.0

1.0 to 1.5 0.5 to 1.0

1.0 to 1.5 0.5 to 1.0

1.0 to 1.5 0.5 to 1.0

Imperial (Wing nut type)

Outer dia. of copper pipe

6.4

9.5

12.7

15.9

R410A R22

1.5 to 2.0 1.0 to 1.5

1.5 to 2.0 1.0 to 1.5

2.0 to 2.5 1.5 to 2.0

2.0 to 2.5 1.5 to 2.0

Flare the pipe.

Remove the flare tool
and check the flared
surface.

Slowly and carefully turn
the flare tool handle
while it clicks, until it
turns freely. Turn the
handle to the left and
raise it to the top.

If the handle is not raised to the
top, the flare tool will scratch the
extended portion of the pipe
(the cone-shaped portion).

• If the “A” dimension is small, the flared contact surface is

smaller and a gas leak becomes more likely.

• The pipe will not be flared fully.

• The extended portion of the pipe (the cone-shaped portion)

will be scratched.

• Extruding margin of copper pipe
with flare machining : A (Unit: mm)

Copper pipe outer dia.

9.5

12.7

15.9

A

13.2

16.6

19.7

+0.0
–0.4

A

Check list :

• Is the inner surface of the flared portion equal in width and shiny?

• Is the thickness of the flared portion equal?

• Is the flared portion of a suitable size?

26

5-12. Flushing

The flushing process uses gas pressure to remove foreign matter from the inside of pipes.

Three major effects

(1) Removes oxidation that formed inside of the pipe during brazing as a result of an inadequate “nitrogen gas

blow” procedure.
(2) Removes foreign matter and moisture that has gotten inside of pipes due to improper handling.
(3) Checks the connections in the pipe system between the indoor unit and the outdoor unit.

[Example work procedure]

1. Install a pressure reducing valve on a nitrogen cylinder. (Fluorocarbon gases and carbon dioxide carry a risk

of promoting condensation, while oxygen causes explosion.)

2. Connect the pressure reducing valve to a gauge manifold and then to the gas-side pipe and the liquid-side

pipe on the outdoor unit.

Indoor unit

Ø6.4 copper pipe

N21

Diff. size union

3. On the indoor unit side, plug all gas-side pipes except those for the

indoor units that are to be flushed.

4. Open the source valve on the nitrogen cylinder and increase the

pressure on the secondary side of the pressure reducing valve until it
reaches 0.5MPa (5kg/cm2G), and then open the valve on the gauge
manifold connected to the gas-side pipe.

5. Flushing

Press down on the end of the indoor-side gas pipe with your palm.

VLV

H

Gauge
manifold
valve

Source
valve

Reducing
valve

Nitrogen gas bomb

Plug (Brass)

1st side

Source valve

Flare nut

Copper pipe

2nd side

0.5MPa
(5kg/cm²G)

When the pressure becomes so great that you can no longer hold it
against the end of the pipe, remove your hand from the pipe. (This is
the first flush.) Press down against the end with your hand again.

Flush the pipe a second time.
(When flushing, place a piece of gauze, etc., on the end of the pipe,
and then check the gauze for debris or moisture. Repeat the flushing
process until nothing more comes out of the pipe.)

6. Close the gauge manifold valve, and repeat the above process for

next indoor unit (No. 2 to No. N). Close the gauge manifold valve,
open the valve on the gauge manifold that is connected to the liquid­side pipe to allow the nitrogen to flow, and flush that liquid-side pipe.

27

Nitrogen

Hand

gas

Reducing valve

Pressure

0.5MPa (5kg/cm²G)

5-13. Pipe Connections to the Indoor Unit

1. Once you remove the flare nut from the pipe on

the indoor unit (always use a torque wrench), a
small amount of gas will escape, but this is simply
nitrogen gas with atmospheric pressure that was
sealed inside to prevent corrosion, and does not
indicate a problem.

2. Flare the pipe according to the procedure

described previously.

3. Centering

Center the pipes be seating the tapered portion of
the half union in the flared portion of the pipe.

4. Tightening the flare nut

First hand-tighten the flare nut as much as
possible, and then use a torque wrench to tighten
the nut completely.

<Indoor unit> <Pipe>

Center

Brazing union
(half union)

Tapered portion

Flared portion

Flare nut

Connecting pipe outer dia.

(mm)

Ø6.4
Ø9.5

Ø12.7∗
Ø15.9∗

Tightening torque

(N•m)

14 to 18 (1.4 to 1.8 kgf•m)
34 to 42 (3.4 to 4.2 kgf•m)
50 to 62 (5.0 to 6.2 kgf•m)
68 to 82 (6.8 to 8.2 kgf•m)

∗ : R410A torque wrench required.

<Two spanners>

Turn flare nut with a wrench

<Indoor unit> <Pipe>

Secure half union in place with a wrench

Tightening the flare nut with a torque wrench

* Avoid initially tightening the nut with a wrench.
* When tightening a 6.4mm-diameter pipe, tighten the nut lightly with a wrench, and then tighten the nut about

90° to 120° (1.5 to 2 corners of the nut) with a torque wrench.

28

5-14. Pipe Connection to the Outdoor Unit

WARNING

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

If the leaked refrigerant gas comes to contact with a fire, the noxious gas may generate.

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

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

Connection of refrigerant pipe

1. The refrigerant pipe connecting section is set in the outdoor unit. Remove the front panel and the piping/wiring

panel. (M5: 9 pcs.)

• As shown in the right figure, the hooking hooks are attached at right and left sides each on the front panel.
Lift up and remove the front panel.

2. Pipes can be drawn out forward and downward from the outdoor unit.

3. When drawing out the pipe forward, draw out the pipe to outside via piping/wiring panel, and keep space of
500mm or more from the main pipe connecting the outdoor unit with the indoor unit, considering service work,
etc. (For replacing the compressor, 500mm or more space is required.)

4. When drawing out the pipe downward, remove the knockout of the base plate of the outdoor unit, apply the
pipe to outside of the outdoor unit, and perform piping at right/left or rear side. Leading pipe of the balancing
should be within 4m.

Hook

Packed valve at
suction gas side

(Left piping)

500mm

or more

Drawing out
forward

(Left piping)

(Right
piping)

Drawing out
downward

Front panel

Piping/wiring panel

(Rear piping)

(Right piping)

Packed valve
at liquid side

Packed valve at balance side
(It is not used in this model.)

Ball valve at discharge gas side

REQUIREMENT

For brazing, be sure to use nitrogen gas to avoid oxidation of pipe inside.

1. In a welding work for the refrigerant pipes, be sure to use the nitrogen gas in order to prevent oxidation
inside of the pipes; otherwise clogging of the refrigerating cycle due to oxidized scale generates.

2. Use clean and new pipes for the refrigerant pipes and perform piping work so that water or dust is not
mixed.

3. Be sure to use a double spanner to loosen
or tighten the flare nut. If a single spanner is
used, a required tightening cannot be obtained.
Tighten the flare not with the specified torque.

Outer dia. of copper pipe

12.7 mm

15.9 mm

Tightening torque (N•m)

50 to 62 (5.0 to 6.2 kgf-m)
68 to 82 (6.8 to 8.2 kgf-m)

29

Pipe connecting method of valve (Example)

Using the attached pipes as shown in the following figure, braze elbows, sockets, and pipes which are procured locally.

MMY- Drawing out forward Drawing out downward

Liquid pipe Use the attached pipe for connection.

Discharge gas pipe

Suction gas pipe

Use the attached pipe (L-shape) and connect it
with socket.

Cut L-shape pipe and connect it with elbow,
attached pipe and socket.

Pipe connection at the local site
(Bend rightward slightly.)

Use the attached pipe (Straight pipe) and connect
it with socket.

Cut L-shape pipe and connect it with attached pipe
and socket.

MAP0801FT8
MAP1001FT8

MAP1201FT8

Suction gas pipe

Discharge
gas pipe

Liquid pipe

Attached pipe

Socket

Pipe

Suction gas pipe

L-shape pipe

Attached pipe

Pipe

Attached pipe

Socket

Pipe

Cut

Liquid pipe Use the attached pipe for connection.

Discharge gas pipe Use the attached pipe and connect it with socket.

Suction gas pipe

Cut L-shape pipe and connect it with attached
pipe.

Suction gas pipe

Discharge
gas pipe

Liquid pipe

Attached pipe

Socket

Pipe

Suction gas pipe

Cut

L-shape pipe

Attached pipe

Pipe

Pipe

Suction gas pipe

Discharge
gas pipe

Liquid pipe

Attached
pipe

Pipe

Socket

Pipe

Suction gas pipe

Cut

L-shape pipe

Attached pipe

Socket

Pipe

Pipe connection at the local site
(Bend rightward slightly.)

Use the attached pipe (Straight pipe) and connect
it with socket.

Cut L-shape pipe and connect it with attached pipe
and socket.

Suction gas pipe

Discharge
gas pipe

Liquid pipe

Attached
pipe

Pipe

Socket

Pipe

Suction gas pipe

Cut

L-shape pipe

Attached pipe
Socket

Pipe

30

5-15. Leak Test

A leak test must be performed when connecting pipes to the refrigerant pipes in use at a site.

[1] Leak test pressure

For Super HRM air conditioner systems: 3.73MPa (38kg/cm2G)

[2] Test method

After the refrigerant piping has finished, execute an airtight test. For an airtight test, connect a nitrogen gas bomb as
shown in the figure below, and apply pressure.

• Be sure to apply pressure from the service ports of the packed valves (or ball valves) at liquid side, discharge gas
side, and suction gas side.

• An airtight test can be only performed to the service ports at liquid side, discharge gas side, and suction gas side of the
outdoor unit.

• Close fully valves at liquid side, discharge gas side, and suction gas side. As there is possibility that nitrogen gas
enters in the refrigerant cycle, re-tighten the valve rods before applying pressure. (Re-tightening of the valve rods
are unnecessary for valves at discharge gas side because they are ball valves.)

• For each refrigerant line, apply pressure gradually with steps at liquid side, discharge gas side, and suction gas side.

Be sure to apply pressure to suction gas side, discharge gas side, and liquid side.

REQUIREMENT

Never use “Oxygen”, “Flammable gas” and “Noxious gas” in an airtight test.

Connected to indoor unit

Packed valve fully closed
(Suction gas side)

Brazed

Fully
closed

Fully
closed

Detailed drawing of packed valve

To gauge manifold

Discharge gas side
service port

Discharge gas side
ball valve

Liquid side
service port

Liquid side
packed valve

Piping at site

To
outdoor
unit

Piping
at site

To outdoor unit

Main pipe

Suction gas side
service port

Suction gas side
packed valve

To outdoor
unit

Piping
at site

STEP 1 : Apply pressure 0.3MPa (3.0kg/cm2G) for 3 minutes or more.
STEP 2 : Apply pressure 1.5MPa (15kg/cm
STEP 3 : Apply pressure 3.73MPa (38kg/cm

2

G) for 3 minutes or more.

2

G) for approx. 24 hours. Available to detect slow leakage

Low­pressure
gauge

Outdoor unit

Service
port

Service port

Ball valve fully closed
(Discharge gas side)

Packed valve fully closed
(Liquid side)



Available to detect a gross leakage

Ø6.4

Copper pipe



VLV

Ø6.4
Copper
pipe

High­pressure
gauge

Gauge

H

manifold

Reducing
valve

Nitrogen

gas

• Check pressure down.
No pressure down: Accepted Pressure down: Check the leaked position.

However, if there is difference of ambient temp. between when pressure has been applied and when

 

24 hours passed, pressure changes by approx. 0.01MPa (0.1kg/cm²G) per 1°C. Correct the pressure.

 

Leaked position check

When a pressure-down is detected in STEP 1, STEP 2, or STEP 3, check the leakage at the connecting points.
Check leakage with hearing sense, feeler, foaming agent, etc, and perform re-brazing or re-tightening of flare if
leakage is detected.

31

NOTES

If piping is long, an airtight test is performed for each divided block.

1) Indoor side + vertical pipe

2) Indoor side + vertical pipe + outdoor side

[3] Air purge

For the air purge at installation time (Discharge of air in connecting pipes), use “Vacuum pump method” from
viewpoint of protection of earth environment.

• For protection of earth environment, do not discharge the flon gas in the air.

• Using a vacuum pump, eliminate the remained air (nitrogen gas, etc.) in the unit. If gas remains, an absence of

faculties may be caused.

After the airtight test, discharge nitrogen gas. Then connect the gauge manifold to the service ports at liquid, suction
gas, and discharge gas sides, and connect the vacuum pump as shown in the following figure. Be sure to perform
vacuuming for liquid, suction gas and discharge gas sides.

• Be sure to perform vacuuming from both liquid and gas sides.

• Be sure to use a vacuum pump with counter-flow preventive function so that oil in the pump does not back up in the

pipe of the air conditioner while the pump stops. (If oil in the vacuum pump enters in the air conditioner with R410A
refrigerant, a trouble is caused in the refrigerating cycle.)

Connected to indoor unit

Main pipe

Packed valve fully closed
(Suction gas side)

Outdoor unit

Low­pressure
gauge

VL VH

High­pressure
gauge

Gauge
manifold

Detailed drawing of packed valve

To gauge manifold

Discharge gas side
service port

Discharge gas side
ball valve

Liquid side
service port

Liquid side
packed valve

Piping at site

Suction gas side service port

Suction gas side
packed valve or
ball valve

To outdoor
unit

To
outdoor
unit

Piping
at site

To outdoor unit

Piping
at site

Brazed

Fully
closed

Fully
closed

Service
port

Service port

Ball valve fully closed
(Discharge gas side)

Packed valve fully closed
(Liquid side)

P

Vacuum pump

• Use a vacuum pump having a high vacuuming degree (below -755mmHg) and a large exhaust gas amount (over
40L/minute).

• Perform vacuuming for 2 or 3 hours though time differs due to pipe length. In this time, check all packed valves at
liquid, suction gas, and discharge gas sides are fully closed.

• If vacuuming valve amount is not decreased to below -755mmHg even after vacuuming for 2 hours or more,
continue vacuuming for 1 hour or more. If -755mmHg or less cannot be obtained by 3 hours or more vacuuming,
check the leaked position.

• When vacuuming valve reached to -755mmHg or less after vacuuming for 2 hours or more, close valves VL and VH
of the gauge manifold fully, stop the vacuum pump, leave it as it is for 1 hour, and then check the vacuuming
degree does not change. If it changed, there may be a leaked position. Check the leaked position.

• After the above procedure of vacuuming has finished, exchange the vacuum pump with a refrigerant cylinder and
advance to the additional charging of refrigerant.

32

5-16. Charging Requirement with Additional Refrigerant

After the system has been vacuumed, replace the vacuum pump with a refrigerant cylinder and charge the
system with additional refrigerant.

Calculating the amount of additional refrigerant required

Refrigerant in the system when shipped from the factory

R410A

8HP 10HP 12HP

Refrigerant amount charged in factory Heat recovery model

When the system is charged with refrigerant at the factory, the amount of refrigerant needed for the pipes at the
site is not included. Calculate the additional amount needed, and add that amount to the system.

(Calculation)

Additional refrigerant charge amount is calculated from size of liquid pipe at site and its real length.

[Additional refrigerant charge amount at site] =

[Real length of liquid pipe] × [Additional refrigerant charge amount per liquid pipe 1m (Table 1)] × 1.3

Example : Additional charge amount R (kg) ={(L1 x 0.025kg/m) + (L2 x 0.055kg/m) + (L3 x 0.105kg/m)} × 1.3

L1 : Real total length of liquid pipe Ø6.4 (m)
L2 : Real total length of liquid pipe Ø9.5 (m)
L3 : Real total length of liquid pipe Ø12.7 (m)
System : 10HP

14.0kg 14.0kg 14.0kg

Table 1

Pipe dia. at liquid side
Additional refrigerant amount/1m

Ø6.4 Ø9.5 Ø12.7

0.025kg 0.055kg 0.105kg

33

Refrigerant charging

• Keeping valve of the outdoor unit closed, be sure to charge liquid refrigerant from service port at liquid side.

• If the specified amount of refrigerant cannot be charged, open fully valves of outdoor unit at liquid, suction gas,

and discharge gas sides, perform cooling operation under condition that valve at suction gas side returns to
close side a little, and then charge refrigerant into service port at suction gas side. In this time, choke the
refrigerant slightly by operating valve of the bomb to charge refrigerant. The liquid refrigerant may be charged
suddenly, therefore be sure to charge refrigerant gradually.

• When refrigerant leaks and shortage of refrigerant generates, recover refrigerant in the system and recharge
new refrigerant up to the correct level.

<Example of calculation>

MMY-MAP1001FT8

Ø9.5 (4m)

Liquid pipe
Ø12.7 (30m)

FS unit

Ø12.7 (10m)

Ø9.5 (7m) Ø9.5 (7m) Ø6.4 (3m) Ø9.5 (5m) Ø6.4 (5m)

Ø9.5 (3m)

Ø9.5 (10m)

Ø9.5 (3m) Ø6.4 (2m) Ø9.5 (5m)

Indoor unit

Liquid pipe :

024 024 009 024 009

<Cooling only>

Ø6.4 = 3 + 2 + 5 = 10m
Ø9.5 = 10 + 4 + 7 + 3 + 7 + 3 + 5 + 5 = 44m
Ø12.7 = 30 + 10 = 40m

R = {(10m x 0.025kg/m) + (44m x 0.055kg/m) + (40m x 0.105kg/m)} × 1.3 = 8.93kg

REQUIREMENT

<Entry of refrigerant charge amount>

• Fill the additional refrigerant record column of the wiring diagram indication plate with the additional

refrigerant amount at installation work, total refrigerant amount and the name of the service man who
charged refrigerant at installation time.

• The total refrigerant amount means the total value of the refrigerant amount at shipment and the additional

refrigerant amount at installation time. The refrigerant amount at the shipment is one described on the “Unit
nameplate”.

34

Chart of additional refrigerant charging amount

Unit [kg]

Actual piping

length (m)

1

2

3

4

5

6

7

8

9

10

11

12

Pipe size (Liquid pipe)

Ø6.4 Ø9.5 Ø12.7

0.025 0.055 0.105

0.050 0.110 0.210

0.075 0.165 0.315

0.100 0.220 0.420

0.125 0.275 0.525

0.150 0.330 0.630

0.175 0.385 0.735

0.200 0.440 0.840

0.225 0.495 0.945

0.250 0.550 1.050

0.275 0.605 1.155

0.300 0.660 1.260

Actual piping

length (m)

31

32

33

34

35

36

37

38

39

40

41

42

Pipe size (Liquid pipe)

Ø6.4 Ø9.5 Ø12.7

0.775 1.705 3.255

0.800 1.760 3.360

0.825 1.815 3.465

0.850 1.870 3.570

0.875 1.925 3.675

0.900 1.980 3.780

0.925 2.035 3.885

0.950 2.090 3.990

0.975 2.145 4.095

1.000 2.200 4.200

1.025 2.255 4.305

1.050 2.310 4.410

13

14

15

16

17

18

19

20

21

22

23

24

25

26

0.325 0.715 1.365

0.350 0.770 1.470

0.375 0.825 1.575

0.400 0.880 1.680

0.425 0.935 1.785

0.450 0.990 1.890

0.475 1.045 1.995

0.500 1.100 2.100

0.525 1.155 2.205

0.550 1.210 2.310

0.575 1.265 2.415

0.600 1.320 2.520

0.625 1.375 2.625

0.650 1.430 2.730

43

44

45

46

47

48

49

50

51

52

53

54

55

56

1.075 2.365 4.515

1.100 2.420 4.620

1.125 2.475 4.725

1.150 2.530 4.830

1.175 2.585 4.935

1.200 2.640 5.040

1.225 2.695 5.145

1.250 2.750 5.250

1.275 2.805 5.355

1.300 2.860 5.460

1.325 2.915 5.565

1.350 2.970 5.670

1.375 3.025 5.775

1.400 3.080 5.880

27

28

29

30

0.675 1.485 2.835

0.700 1.540 2.940

0.725 1.595 3.045

0.750 1.650 3.150

35

57

58

59

60

1.425 3.135 5.985

1.450 3.190 6.090

1.475 3.245 6.195

1.500 3.300 6.300

<Full opening of the valve>

• Open valve of the outdoor unit fully.

• Using 4mm-hexagonal wrench, open fully the valve rods at liquid side.

• Using a spanner, etc, open fully the valve rod of packed valve at suction gas side.

• Using the pinchers, open fully the handle of the ball valve at discharge gas side.

Be careful that handling of ball valve differs from that of packed valve.

How to open the ball valve at discharge gas side

Charge port

Valve unit

Handle
Pull out the handle and
using cutting pliers, etc.
turn it counterclockwise
by 90˚. (Open fully)

Flare nut

Charge port

Valve unit

Push in handle.

Flare nut

Closed completely

Handle

Opened fully

<Heat insulation for pipe>

• Apply heat insulation of pipe separately at liquid, suction gas, and discharge gas sides.

• Be sure to use thermal insulator with heat-resisting temp. 120°C or more.

CAUTION

• After piping connection work has finished, cover the opening of the piping/wiring panel with the piping

cover, or fill silicon or putty in space of the pipes.

• In case of drawing-out the pipes downward or sideward direction, also close the openings of the base plate

and the side plate.

• Under the opened condition, a trouble may be caused due to entering of water or dust.

Drawing-out
frontward

In case of using pipe cover In case of using no pipe cover

Piping/wiring panel

Drawing-out downward

Drawing-out sideward

Close the opening
with pipe cover.

Drawing-out
frontward

Piping/wiring panel

Drawing-out sideward

Fill silicon or putty in
periphery of the pipes.

Drawing-out downward

36

• Check the additional amount of refrigerant.

<Check list>

Calculate the additional amount of refrigerant from the additional amount of refrigerant (A) by the pipe diameter
at liquid side and the pipe length to be connected and multiply the specific number.

Additional amount
of refrigerant pipe length refrigerant per liquid pipe 1m

Firstly enter the total length for each liquid pipe in the following table, and then calculate the additional amount of
refrigerant by pipe length.

<Additional amount of refrigerant by pipe length>

Pipe dia at
liquid side

Ø6.4
Ø9.5

Ø12.7

<Additional amount of refrigerant>

Additional amount of refrigerant by pipe length (A)
Additional amount of refrigerant ((A) × 1.3)

Standard amount of refrigerant

0.025 ×

0.055 ×

0.105 ×



Real liquid



=





kg/m









Additional amount of

×































(A)

Total pipe length at each liquid side

=
=
=

Additional amount of refrigerant by pipe
length (A)

kg
kg

×

1.3



Additional amount of refrigerant pipe

dia at each liquid side kg

Kg
Kg
Kg

Kg

37

5-17. Insulation Work

Work procedure

Refrigerant

piping work

Heat insulating work

(Except connecting section)

Airtight test

Heat insulating work
(Connecting section)

Material

Use material withstanding sufficiently to temperature of pipe for the heat insulator.

Example : Heat insulating polyethylene foam (Heat insulating 120°C or more)

Insulation guidelines

All insulation work for brazed joints, flared joints, etc., should be performed only after successfully passing the
leak test. Suction gas pipes, discharge gas pipes and liquid pipes must be insulated separately in Super HRM
air conditioning system.

Examples of Correct Insulation

[Insulating both a gas pipe [Insulating supported
and a liquid pipe] sections]

Insulation Insulation

Discharge
gas pipe

Control wires

Finishing
tape

Insulation

Suction
gas pipe

Liquid
pipe

Copper pipe

• Gas pipes and liquid pipes [Insulating just a gas pipe]

cannot be insulated
simultaneously.

Liquid pipe

Suction
gas pipe

Insulation

Examples of Incorrect Insulation

Discharge
gas pipe

Control
wires

Finishing tape

Liquid pipe

Discharge
gas pipe

Suction gas pipe

Insulation

Control
wires

Insulation

Finishing tape

Insulation

Support
bracket

• Insulate all joints

adequately.

38

This portion is
not insulated.

CAUTION

(1) Use the insulating material provided to insulate the indoor unit pipe connection (union and flare nut).

Insulated pipe provided

Wrap with vinyl tape.

(Peel off paper to apply.)

Gas-side pipe

Insulation provided

Gas-side pipe

Seal with vinyl tape.

(2) When insulating branch joints, align the insulating material that was provided with the branch kit with the

pipe on site and tape the insulation in place.

Tape

Insulation (in use on site)

Insulation (in use on site)

Where the insulation that is provided with the branch kit meets the insulation that is in use on the site, butt the
ends of the insulation together so that there is no gap and install the insulation as illustrated below, and then
tape the insulation in place.

Where insulation meets,
butt the insulation together with no gap.

Pipe insulation in use at site

(3) If it is likely that heat will build up in the

ceiling (examples: inside a slate roof, or
inside a ceiling with air that is basically
outside air), refrigerant pipes should be
insulated with 8 to 10 mm of normal
insulation, encased in fiberglass insulation
(16 to 20kg/m3) that is at least 10mm thick.

150

Branch kit insulation

Insulation (in use on site)
Thickness: 10mm or more

Insulating material that is provided for
use on pipe connections at the indoor unit.

39

5-18. Reference for Insulation Work

10

0

10

20

30

40

50

60

70

80

90

100

20 30 40

Temperature inside pipe: 5˚C

Relative humidity outside of pipe (%)

Condensation zone

Temperature outside of pipe (˚C)

Safe zone

10mm
thickness

20mm
thickness

Reference

Sometimes, copper pipe with insulated sheathing is used in order to save labor. The following reference applies
to this type of pipe.

n Types and Characteristics of Copper Pipe with Insulated Sheathing

• Insulation: 8 to 10mm

<Pair coil>

Insulation
(chemically cross-linked 30x foam polyethylene)

Outer film

Copper pipe
(phosphoric-deoxidized seamless copper pipe)

(polyethylene)

Heat insulator (mm) Heat insulator (mm)

Outer dia. Thickness Outer dia. Thickness

27 8 51 20

34 10 54 20

37 10

37 10 57 20

Pair coil

Soft

Hard

Half hard

Hard

Half hard

Copper pipe (mm)

(Outer dia. × thickness)

6.35 × 0.8 24 8 48 20

9.52 × 0.8

6.35 × 0.8 24 8

12.70 × 0.8

6.35 × 0.8 24 8

15.88 × 1.0

9.52 × 0.8 27 8

15.88 × 1.0

19.05 × 1.0 ———61 20

22.22 × 1.0 ———64 20

28.6 × 1.0 ———68 20

Coil length

(m)

20

20

20

20

n Condensation characteristics (Temperature inside pipe: 5°C, copper pipe 15.88mm)

• Insulation: 20mm

Insulation

Outer film
(polyethylene)

(chemically cross-linked
30x foam polyethylene)

n Example uses for different

thicknesses of insulation

Insulating

material

10mm

20mm

Copper pipe
(phosphoric-deoxidized
seamless copper pipe)

Example use

When pipe is indoors, and a small
amount of condensation under
certain conditions is acceptable

When pipe is indoors, and even a
small amount of condensation is

unacceptable

n Insulation characteristics

Material

Copper

pipe

Insulation

40

Item

Material

Material

Temperature

range

Phosphoric-deoxidized seamless
copper pipe

Chemically cross-linked 30x foam
polyethylene with textured outer
covering

–40°C to 120°C (shrinkage: 1%)

Specifications

6. INDOOR UNIT INSTALLATION

g

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, hold the hooking metals (4 positions) only.

Do not apply force to the other parts (refrigerant pipe, drain pan, foamed parts, or resin parts, etc.).

• Carry the package by two or more persons, and do not bundle it with PP band at positions other than

specified.

6-1. Before Installation

Before starting installation and before unpacking the air conditioner, check the model name. After unpacking the
unit, check the standard accessories that are packed in plastic bags together with the unit. Be sure not to throw
them away with the box by mistake.

6-2. Standard Accessories

4-way air discharge cassette type

Part name Q’ty Shape Use Part name Q’ty Shape Use

Installation
Manual

Heat
insulating pipe

Installation
pattern

2 —— (Be sure to hand over customers) Heat insulator 1

2

1 ——

For heat insulating of pipe
connecting section

For confirmation of ceiling openin
and main unit position

Washer 8 For hanging down unit

Hose band 1 For connecting drain pipe

For heat insulating of drain
connecting section

Installation
gauge

Pattern fixing
screw

2

4M5

x

For positioning of ceiling position
(united with installation pattern)

16 lFor attaching pattern Heat insulator 1

Flexible hose 1 For centering the drain pipe

41

For sealing the wire connection
opening

2-way air discharge cassette type

g

g

l

Part name Q’ty Shape Use Part name Q’ty Shape Use

Installation Manual 1 ——

Heat insulating pipe 2

MMU-AP0301WH
type or lower

pattern

MMU-AP0481WH

Installation

type

1

——

2

(Be sure to hand this
over customers)

For heat insulating pipe
connecting section

For checkin g the
position of the ceiling
openings and the unit

Installation
gauge

Pattern fixing
screw

Fan motor
connector

Heat insulator 1 For seal for wire connecting port

Ceiling panel components (2-way air discharge cassette type)

Name Ceiling pa nel Center panel Air filter

Shape
(Q'ty)

(1 set) (1 pc)

Usage ——— ———

• RBC-UW466PG :
Attached to indoor unit (4 pcs) (2 pcs)

Attached to ceiling
panel, and removes
dust.

1

6M5 x 16

1

Screw installing panel

l

20mm

M5×20

For fixing ceiling
panel
(4 corners)

For positionin
(United with installation pattern)

For attaching the installation
pattern

For changing fan motor r.p.m. to
apply higher ceiling

of ceiling position

Screw installing panel

30mm

M5×30

For tentative hanging
and fixing ceiling panel
(Center part)

l

Part name

Installation
Manual

Heat
Insulating
pipe

Installation
gauge

Installation
pattern

Q’ty Q’ty

AP0071YH

to

AP0121SH

11——

22

— 1

1 ——

AP0151SH

to

AP0241SH

Ceiling panel components (1-way air discharge cassette type)

Part name

RBC-US135PG, 165PG, 265PG type

1-way air discharge cassette type

Shape Usage Part name

(Be sure to hand
over customers)

For heat insulating
of pipe connecting
section

For positioning of
ceiling position

For confirmation of
ceilin

opening and

main unit position

Q’ty

Connector — 1

Banding
band

Drain-up
pipe

Pattern
fixing
screw

AP0091SH
AP0121SH

to

— 10

— 4

5 — M5 x 16

AP0151SH

to

AP0241SH

Shape Usage

Use

For motor speed
up when installed
to high ceiling

Used to fix drain
piping

For drain-up of
discharge port

For attaching

l

pattern

Ceiling panel 1 ———
Intake grille 3 ———
Air filter 1 Installs in the intake grille and remove s dust a nd dirt from the air.
Panel installation screw (M5 x 20) 7 For securing the ceiling panel
Screw head insulation 1 set Prevents condensation from forming on screw heads

42

Concealed duct type

Part name Q’ty Shape Use Part name Q’ty Shape Use

Installation
Manual

Insulated
pipe

1 —— —— Washer 8 For hanging down the unit

2

For heat insulating pipe
connecting section

Concealed duct high static pressure type

Part name Q’ty Shape Use Part name Q’ty Shape Use

Installation
Manual

Insulation 1

1 —— —— Insulation 1

For insulating the gas pipe
connection

For insulating the liquid pipe
connection

Under ceiling type

Part name Q’ty Shape Use Part name Q’ty Shape Use

Installation
Manual

Heat
insulating pipe

1

2

This

manual

(Be sure to hand over to
customers)

For heat insulation of pipe
connecting section

Heat
insulator

Washer 4 For hanging-down unit

1

For heat insulation of drain
connecting section

Installation
pattern

Banding band 2 For drain hose forming Drain hose 1 For drain piping

Bushing 1 For power supply cord protection

1 —

For confirmation of ceiling
opening and main unit position

Hose band 2 For connecting drain pipe

Heat
insulator

1 For sealing of piping hole

High wall type

Part name Q’ty Shape Use Part name Q’ty Shape Use

Installation
Manual

Heat
Insulating pipe

Wood screw
Ø5.1 x 45

Installation
plate

l

1

2

12 Used to fix installation plate

1 Used install indoor unit wall unit

This

manual

(Be sure to hand over customers)

For heat insulating of pipe
connecting section

Installation
pattern

Screw cap 4 Cover on fixing screw at side plate

Bundling
band

1 ——

4

Used for drilling holes and
positioning for installation plate

Used to fix attached pipe heat
insulating material

Floor standing cabinet type

Part name Q’ty Shape Use Part name Q’ty Shape Use

Installation
Manual

Heat
insulation

1 —— Bushing 1

2

For insulating the indoor unit pipe
connections

For installation in the wire
knockout

43

Floor standing concealed type

g

Part name Q’ty Shape Use Part name Q’ty Shape Use

Installation
Manual

Heat
insulation

Drain pan 1 For water draining

Drain filter 1

1 —— ——

2

For heat insulating the indoor unit
pipe connections

Drain filter
(inside the drain receiver)

Drain receiver
fixing screw

Drain hose 1

Heat insulated
pipe

1 For fix the drain receiver

For water draining
(Attaches to the drain receiver.)

1

For insulatin
(Attaches to the drain receiver.)

Floor standing type

Attached position Part name Q’ty Shape Stored position

Upper part of main unit Bracket for fixing to wall 1

Installation Manual 1 These sheets

Thermal insulator 2

Accessory bag

Screw bolt

Thermal insulator 2

Lower part of main unit Bracket for fixing to floor 2

∗

4 (2)

Base for
transportation

Using 4 (2) screw bolts,
fix to the base.

the drain r eceiver

Indoor unit

∗ Quantities in the parentheses are for MMF-AP0361, AP0481 and AP0561 models.

The brackets for fixing to the floor are already mounted to the indoor unit.

44

6-3. 4-Way Air Discharge Cassette Type

Installation space

Secure the specified space in the figure for installation and servicing.

15 or more

1000 or more

A

1000

or more

Obstacle

Selection of installation place

In case of continued operation of the indoor unit under
high-humidity conditions as described below, dew may
condense and water may drop.

Especially, high-humidity atmosphere (dew point
temperature : 23°C or more) may generate dew inside
the ceiling.

1. Unit is installed inside the ceiling with slated roof.

2. Unit is installed at a location using inside of the
ceiling as fresh air take-in path.

3. Kitchen

If installing a unit at such place, put insulating material
(glass wool, etc.) additionally on all the positions of the
indoor unit which come to contact with high-humidity
atmosphere.

1000 or more

Model MMU- A mm

AP0091H to AP0301H
AP0361H to AP0561H

271 or more
334 or more

Advice

Set a service check opening panel at right side of
the unit (size: 450 x 450mm or more) for piping,
maintenance, and servicing.

Ceiling height

Model MMU­AP0091H to AP0121H
AP0151H to AP0301H
AP0361H to AP0561H

When the height of the ceiling exceeds the distance
of the item Standard/4-way in Table below, the hot
air is difficult to reach the floor. Therefore, it is
necessary to change the setup value of the high
ceiling switch or discharge direction.

Possible installed ceiling height

Up to 2.7 m
Up to 3.8 m
Up to 4.3 m

REQUIREMENT

• When using the air conditioner with 2-way discharge system with the standard setting (at a shipment), it
may stop abnormally in heating. Therefore, change the setting switch according to the number of discharge
direction and the ceiling height.

• When using the air conditioner with 2-way/3-way discharge system, a strong wind blows directly if the ceiling
height is lower than the standard. Therefore, change the setting switch according to height of the ceiling.

• When using the high ceiling (1) or (2) with 4-way discharge system, the draft is apt to be felt due to drop of
the discharge temperature.

Installable ceiling (Unit : m)

Model MMU-

No. of discharge direction
Standard (at shipment)
High ceiling (1)
High ceiling (2)

AP0091H to AP0121H

4-way 3-way 2-way

2.7 — 3.0
Cannot be installed

to a high ceiling

AP0151H to AP0181H

4-way 3-way 2-way

2.8 3.2 3.5

3.2 3.5 3.8

3.5 3.8 —

45

AP0241H to AP0301H

4-way 3-way 2-way

3.0 3.3 3.6

3.3 3.5 3.8

3.6 3.8 —

AP0361H to AP0561H

4-way 3-way 2-way

3.6 3.9 4.2

3.9 4.1 4.3

4.2 4.3 —

High ceilong setup

Set data

0000
0001
0003

External view

254.5

Z

35

35˚

723 hanging bolt pitch

panel external dimension

B

950

840
480

381.6

227

Electric parts box

415

346.5
790 hanging bolt pitch

Hanging bolt
M10 or W3/8 local arrange

Drain discharge port

A

Suction grille (Air suction port)

950

panel external dimension

ceiling open dimension

For branch duct knockout square hole for Ø150
Round duct (2 positions at right side)

210

Air discharge port (4-way)

860 to 910

840

250 70
270

105

105

860 to 910

ceiling open dimension

Refrigerant pipe
connecting port
(Gas) D

Refrigerant pipe
connecting port
(Liquid) C

97

88

130

Bottom face of ceiling Bottom face of ceiling

360

57.5

25

188

Bottom face
of ceiling

Knockout for simple OA
For Ø100

Z view

64

57

Indoor unit Bottom face of ceiling

(NOTE)
As ABS is used for the drain discharge

port of the main unit, the vinyl chloride
paste cannot be used.

Use the flexible hose (Band fix)
included in the package.

Drain-up standing-up size Space required for installation and servicing

Stand-up

Stand-up

640 or less

850 or less

• Wired remote controller (RBC-AMT21E)

4

2.7

30

Model CBAD
AP0091H to AP0121H
AP0151H to AP0181H
AP0241H to AP0301H
AP0361H to AP0561H

1000 or more

15 or more

1000 or more

200

256

319

15 or more

45

113

173

Ø6.4

120

Ø9.5

183

1000 or more

mm

Ø9.5

Ø12.7
Ø15.9

120

120

16

46

Check port

( 450)

Check port

( 450)

200

Ceiling opening and installation of hanging bolts

• Considering pipe/wire connecting work inside the ceiling after the indoor unit has been hanged, select an
installation place and determine piping direction.

• After installation place of the indoor unit has been determined, open the installation hole on the ceiling and
install the hanging bolts.

• For the ceiling opening size and the hanging bolt pitch, refer to the external view and the attached installation
pattern.

• If the ceiling has been already set up, draw the drain pipe, refrigerant pipe, indoor/outdoor inter-unit wire, wire
for central control system, and remote controller wire up to the position where pipes and wires are to be
connected before hanging the indoor unit.

Please procure the hanging bolts and nuts for
installation of the indoor unit at local site.

Hanging bolt

Nut

[How to use the attached installation pattern]

The installation pattern is attached inside of the package cap.

<In case of existing ceiling>

Use the pattern for positioning of the ceiling opening hole and the
hanging bolt.

<In case of new ceiling>

Use the pattern for positioning of the opening hole when setting up a
new ceiling.

• Install the indoor unit after installation of the hanging bolts.

• Using the attached pattern fixing screws (M5 × 16L: 4 pieces), attach

the installation pattern to the indoor unit.
(Screwing to installation brackets of the ceiling panel)

• When setting up the ceiling, open a hole along the outside dimension
of the installation pattern.

Opening a ceiling and installation of hanging bolts

M10 or W3/8
M10 or W3/8

Indoor unit

Installation pattern
(Attached)

M5 × 16L screws (Attached)

These screws are exclusive to the
installation pattern. When installing
the ceiling panel, the other exclusive
screws attached to the ceiling panel
(sold separately) are used.)

4 pieces

12 pieces

[Treatment of ceiling]

The ceiling differs according to structure of building. For details, consult your constructor or interior finish
contractor.

In the process after the ceiling board has been removed, it is important to reinforce ceiling foundation (frame) and
to keep horizontal level of installed ceiling correctly in order to prevent vibration of ceiling board.

(1) Cut and remove the ceiling foundation.
(2) Reinforce the cut surface of ceiling foundation, and add ceiling foundation for fixing the end of ceiling board.

[Installation of hanging bolt]

Use M10 hanging bolts (4 pcs, to be local procure).
Matching to the existing structure, set pitch according to size in the unit external view as shown below.

New concrete slab

Install the bolts with insert brackets or anchor
bolts.

Reinforcing
steel

(Blade type

bracket)

(Slide type

bracket)

Anchor bolt

(Pipe hanging

anchor bolt)

Use existing angles or install new
support angles.

Steel flame structure

Hanging bolt

Hanging bolt Support angle

Existing concrete slab

Use a hole-in anchors, hole-in
plugs, or a hole-in bolts.

47

Installation of indoor unit

• Attach the nut (M10 or W3/8: Procured locally) and the attached
washer (Ø34mm) to the hanging bolt.

• Put washers at up and down of T-groove of the hanging bracket of
the indoor unit to hang the indoor unit.

• Using a level vial, check that four sides are horizontal.
(Horizontal degree: Within 5mm)

• Cut off the attached installation gauge from the installation pattern.

• Using the installation gauge, check and adjust clearance between the

indoor unit and the ceiling opening hole (1) (10 to 35mm common to
four sides) and hanging-down height (2) (12
(Using direction is printed on the installation gauge.)

+5

mm: 4 corners).

0

Hanging bolt
(W3/8 or M10)

Nut
(W3/8 or M10)

Nut
(W3/8 or M10)

(1)Required those other than M10 flat

washer at site.

(2)To prevent falling-off of bolt (safety), be

sure to set it just under the hanging
bracket as shown in the figure.

(1)
M10 flat washer
(Accessory)

(2)
M10 flat washer
(Accessory)

Level vial (Horizontal: within 5mm)

Indoor unit

Installation

gauge

Hanging bolt

Hanging
metal

10 to 35

mm (2)

12 to 17

mm (1)

Ceiling board

Indoor unit

REQUIREMENT

Before installation of the indoor unit, be sure to
remove the cushion for transportation between
the fan and the bell mouth. Running the unit
without removing the cushion may damage the
fan motor.

Ceiling
board

+5
–0

1) 12

mm

Installation
gauge

2) 10 to

35mm

REQUIREMENT

Connect closely the connecting parts between the
ceiling panel and the ceiling surface or between
the ceiling panel and the indoor unit.

If they are incompletely connected, air leaks
resulted in dewing or water leakage.

First, remove the adjust corner caps (4 corners)
from the ceiling panel and then install the ceiling
panel to the indoor unit.

Be sure to remove the cushion for transportation
between the fan and the bell mouth.

Installation of ceiling panel
(Sold separately)

Install the ceiling panel after piping/wiring work has
finished.

Install the ceiling panel according to attached
Installation Manual.

Check the installation dimensions of the indoor unit
and the ceiling opening are correct, and then install it.

Installation of remote controller
(Sold separately)

For installation of the wired remote controller, follow
the Installation Manual attached with the remote
controller.

For installation of the wireless remote controller,
follow to the Installation Manual attached to the
remote controller.

• Do not put the remote controller on the place where
is exposed to direct sunlight or near a stove, etc.

• Operate the remote controller, check the indoor unit
surely receives the signal, and then install the
remote controller. (Wireless type)

• Install the remote controller 1m apart from the
devices such as TV or stereo. (Image may be
disturbed or noise may be output.) (Wireless type)

48

6-4. 2-Way Air Discharge Cassette Type

Lower surface
of ceiling

A mm
or more

5 mm or more

1000mm or more 1000mm or more

Obstacle

1000mm or more

Installation space

Reserve space required to install the indoor unit and for service work.
Keep 5mm or more for clearance between top plate of the indoor unit and the ceiling surface.

<Installation space>

Model MMU-

AP0071WH type to

AP0301WH type
AP0481WH type

Ceiling depth A mm

398 or more
406 or more

Ceiling height

Model MMU-

AP0071WH to AP0121WH type
AP0151WH to AP0301WH type

AP0481WH type

Installable ceiling height

Up to 2.7m
Up to 3.0m
Up to 3.5m

In case of wireless type

The sensor of indoor unit with wireless remote controller
can receive a signal 8m or less. Based upon it, determine
a place where the remote controller is operated and the
installation place of the indoor unit.

• To prevent a malfunction, select a place where is not
influenced by a florescent light or direct sunlight.

• Two or more (Up to 6 units) indoor units with wireless
remote controller can be installed in the same room.

When the ceiling height exceeds 2.7m, the hot
air is difficult to reach the floor. In this case, it is
necessary to exchange number of rotation of the
fan motor by using connector for increase of
number of motor rotation which is attached to the
air conditioner body.

8m or less

• Removal of transport brackets (MMU-AP0151WH type to MMU-AP0301WH type)

• Remove the transport brackets before installation of the indoor unit.

• The transport brackets cannot be removed under condition of ceiling panel installed.

Transport brackets

Remove 4 screws. (Same at opposite side)

Indoor unit

Fan motor

49

• External view

U

V

W

8

Ceiling panel
(Sold separately)

Center of air condition
main unit

S

R

Unit external dimension D

Hanging bolt pitch C

Ceiling open dimension B

Panel external dimension A

J

Knockout hole for partial duct
(Provided also at opposite side)

Center of panel

Electric parts box

K

Ø200

T

60

Hanging bolt pitch H

Unit external dimention G

Ceiling open dimension F

b

d

Hanging bolt
4-M10 required at site

L

Under surface
of ceiling

REQUIREMENT

The hanging bolt pitch on longitudinal
direction is not divided at the center with
the ceiling opening size. Therefore, check
the relational position in the following figure.
If relational position is incorrect, the ceiling

Panel external dimension E

panel cannot be installed.

Refrigerant pipe connecting port
(At gas side ØN)

Refrigerant pipe
connecting port
(At liquid side ØM)

Wire connecting port

X

100 56

Q

Ø150

210

Drain pipe connecting port
(Inner dia. Ø32 polyvinyl
chloride pipe VP25)

75

Knockout hole for fresh air
(At opposite side only)

a

Z

Y

Q

Model MMU- A B C D E F G H J K L M N

AP0071WH to AP0121WH type 1000 960 880 830 265 255 Ø9.5

Ø6.4

AP0151WH to AP0181WH type

1520 1480 1400 1350

650 620 550 480

295

—

280

Ø12.7

AP0241WH to AP0301WH type

Ø9.5 Ø15.9

AP0481WH type 1898 1850 1700 1650 680 650 620 510 455 150 288

Model MMU- Q R S T U V W X Y Z a b d

AP0071WH to AP0121WH type
AP0151WH to AP0181WH type

35 30 35 95 398 222 156 78 178 242 348 70 20

AP0241WH to AP0301WH type

AP0481WH type 15 5 95 105 406 230 166 86 186 250 356 80 24

Ceiling opening and installation of hanging bolts

• Considering pipe/wire connecting work inside the ceiling after the indoor unit has been hanged, select an
installation place and determine piping direction.

• After installation place of the indoor unit has been determined, open the installation hole on the ceiling and
install the hanging bolts.

• For the ceiling opening size and the hanging bolt pitch, refer to the external view and the attached installation
pattern.

• If the ceiling has been already set up, draw the drain pipe, refrigerant pipe, indoor/outdoor inter-unit wire, wire
for central control system, and remote controller wire up to the position where pipes and wires are to be
connected before hanging the indoor unit.

Please procure the hanging bolts, washer and nuts
for installation of the indoor unit at local site.

50

Hanging bolt
Nut
Flat washer

M10 or W3/8
M10 or W3/8
M10

4 pcs.
12 pcs.
8 pcs.

[How to use the attached installation pattern]

The installation pattern is attached inside of the package cap.

<In case of existing ceiling>

Indoor unit

Use the pattern for positioning of the ceiling opening hole and the hanging bolt.

<In case of new ceiling>

Use the pattern for positioning of the opening hole when setting up a new ceiling.

• Install the indoor unit after installation of the hanging bolts.

• Using the attached pattern fixing screws (M5 × 16L: 6 pcs.),

attach the installation pattern to the indoor unit.

Installation pattern
(Attached)

(Screwing to installation brackets of the ceiling panel)

• When setting up the ceiling, open a hole along the outside
dimension of the installation pattern.

M5 × 16L screws (Attached)

These screws are exclusive to the
installation pattern. When installing
the ceiling panel, the other exclusive
screws attached to the ceiling panel
(sold separately) are used.)

Installation of ceiling panel (Sold separately)

Install the ceiling panel after piping/wiring work has finished.
Install the ceiling panel according to attached Installation Manual.
Check the installation dimensions of the indoor unit and the ceiling opening are correct, and then install it.

REQUIREMENT

Connect closely the connecting parts between the ceiling panel and the ceiling surface or
between the ceiling panel and the indoor unit.

If they are incompletely connected, air leaks resulted in dewing or water leakage.

Installation of indoor unit

• Attach the nut (M10 or W3/8: Procured locally) and the plain washer (M10: Procured locally) to the hanging bolt.

• Put washers at up and down of U-groove of the hanging bracket of the indoor unit to hang the indoor unit.

• Using a level vial, check that four sides are horizontal. (Horizontal degree: Within 5mm)

• Cut off the attached installation gauge from the installation pattern.

• Using the installation gauge, check and adjust clearance between the indoor unit and the ceiling opening hole, and

the check and adjust the hanging-down height of the unit. (Using direction is printed on the installation gauge.)

1) Check distance between the bottom surface of the indoor unit and the bottom surface of the ceiling board is

wider than size A. (4 corners)

2) Check the clearance between the side surface of the indoor unit (longitudinal side) and the ceiling board is

same to size B. (Common to right and left)

3) Check the clearance between front surface (Piping side) of the indoor unit and the ceiling board is size C,

and then check also the clearance between the rear surface (Piping opposite side) of the indoor unit and
the ceiling board is size D.

Hanging bolt
(W3/8 or M10)

Nut
(W3/8 or M10)

Nut
(W3/8 or M10)

M10 flat washer
(Accessory)

M10 flat washer
(Accessory)

Indoor unit

Ceiling board

A

B

Front side
(pipe side)

CD

Lower surface
of ceiling

Installation
gauge

Rear side
(Opposite of pipe side)Indoor unit

Installation gauge

51

Installation gauge

Model MMU-

AP0071WH to AP0301WH type

AP0481WH type

ABCD

53 35 95 35
68 15 105 95

REQUIREMENT

• Using a level vial, etc., confirm the horizontal level of the indoor unit.

• Tighten the nut sufficiently, and fix it securely.

Level vial

Fix securely

Installation of ceiling panel (Sold separately)

Install the ceiling panel according to Installation Manual attached with it after piping/wiring work has completed.
Check that installation of indoor unit and ceiling opening part is correct, and then install it.

REQUIREMENT

Connect closely the connecting sections of ceiling panel and ceiling surface, and the ceiling panel and
indoor unit.

If there is clearance, air leakage generates resulting in dewing or water leakage.

52

6-5. 1-Way Air Discharge Cassette Type

Installation space

Secure the space required to installation and servicing.
Keep 5mm or more for clearance between top plate of

the indoor unit and the ceiling surface.

<MMU-AP0071YH to AP0121YH>

Ceiling inside height :

Refrigerant piping port

100mm
and more

<MMU-AP0151SH to AP0241SH>

200mm
and
more

245mm or more

100mm
and more

Ceiling

200mm
or more

Removal of transporting rubbers

<MMU-AP0071YH to AP0121YH>

• Before installation of the indoor unit, remove the
two protective rubbers for transportation which are
inserted between the reinforcing bracket for the fan
motor and the casing.
(Hand over the protective rubbers for
transportation to the customers and ask to keep
them because they are used for transportation
such as reinstallation.)

Protective rubbers for transportation
(remove)

Pull upward to
remove.

Reinforcing bracket

Casing

1000mm
and more

(Piping side)

(Discharge port)

Ceiling

1000mm
and more

Obstacle

Height of ceiling

When height of the ceiling exceeds 3.0m, it is difficult
that the hot air reaches up to the floor surface. In this
case, it is necessary to exchange the motor speed-up
by using a connector, which is attached to the air
conditioner unit.

Installable height of ceiling

Up to 3.0m

Considering cabling and cable connecting works in
the ceiling after hanging the indoor unit, select an
installation place and determine drawing direction of
the cables.

• In a case that the ceiling has been already existed,
draw refrigerant cable, drain cable, indoor
connecting cable and remote controller cord up to
the position where pipes and cables are to be
connected in advance when hanging the indoor
unit.

• Check dimension of the indoor unit, determine size
of the indoor unit itself and the ceiling opening and
perform positioning, using the attached installation
pattern.
(The pattern is attached to bottom surface with five
M5 x 20 screws.)

53

External view <MMU-AP0071YH to AP0121YH>

Power connecting port

Drain pipe connecting port
(VP25)

225

200

150

100

Panel external dimension

110

120

85

1050

Ceiling open dimension

1010

890

Center of panel

850

850

455395

Hanging bolt
4-M10 Arranged at site

50

2020

140

330

23518

400

43020 20

470

Ceiling open dimension

Support
metal

Panel external dimension

400

Refrigerant pipe connecting port
(Gas side Ø9.5)

Refrigerant pipe connecting port
(Liquid side Ø6.4)

Panel mounting
hole 5 positions

• Wired remote controller
(RBC-AMT21E)

4

2.7

120

470

Ceiling panel
(Sold separately)

Discharge louver

Discharge port

1050

Air suction grille

Space necessary for installation and servicing

100

or more

Ceiling
bottom surface

100

or more

245

or more

200

or more

120

16

54

External view <MMU-AP0151SH to AP0241SH>

Z

Panel external dimension A

30 30
65

50 E

60

80

80

Ceiling open dimension B

Center of panelCD

F

125

110

Y

Y view Z view

Pitch 200 × I

Knockout hole for front blow out

H100

A

1010

100

30

655

530

Ceiling open dimension 695

Panel external dimension 755

20 20

30

198

130

10

Power connecting
port

Drain pipe connecting port
(VP25)

620

440

335

Refrigerant pipe
connecting port
(Liquid side) K

Ø150 Knockout hole (For taking in fresh air)
(When take in fresh air, attach a filter,
etc. so that fresh air does not enter directly.)

255

165

160

100

120

Refrigerant pipe
connecting port
(Gas side) J

Ø180

96

G

Note

When using the discharge divided duct and the duct to take in fresh air,
consult your dealer about availability.

• Wired remote controller
(RBC-AMT21E)

4

2.7

120

120

16

755

200 or

Ceiling

AP0151, AP0181
AP0241

Space necessary for installation and servicing

more

1000 or more

254
460

(Air outlet port)

800

100045

Obstacle

1000

or more

(Pipe side)

AModel B C D E F G H I J K

1220

1160

545

485

530

470

1420

1360

645

585

630

570

Ø12.9
Ø15.9

Ø6.4
Ø9.5

55

Ceiling opening and installation of hanging bolts

Pattern
sheet

Ceiling panel fixing screw
(Use the attached screws.)

• Considering pipe/wire connecting work inside the ceiling after the indoor unit has been hanged, select an
installation place and determine piping direction.

• After installation place of the indoor unit has been determined, open the installation hole on the ceiling and
install the hanging bolts.

• For the ceiling opening size and the hanging bolt pitch, refer to the external view and the attached installation
pattern.

• If the ceiling has been already set up, draw the
drain pipe, refrigerant pipe, indoor/outdoor inter­unit cable, cable for central control system, and
remote controller cable up to the position where
pipes and cables are to be connected before
hanging the indoor unit.

Please procure the hanging bolts and nuts for
installation of the indoor unit at local site.

Hanging bolt

Nut

Flat washer

M10 or W3/8
M10 or W3/8

M10

4 pieces
12 pieces
8 pieces

[How to use the attached installation pattern]

The installation pattern is attached inside of the package cap.

<In case of existing ceiling>

Use the installation pattern for positioning of the ceiling opening hole and the hanging bolt.

<In case of new ceiling>

Use the installation pattern for positioning of the opening hole
when setting up a new ceiling.

• Install the indoor unit after installation of the hanging bolts.

• Using the attached installation pattern fixing screws (M5 ×

20L: 4 pieces), attach the installation pattern to the indoor
unit.
(Screwing to installation brackets of the ceiling panel)

• When setting up the ceiling, open a hole along the outside
dimension of the installation pattern.

Installation of indoor unit

CAUTION

This unit is incorporated with drain pump and float switch. Never incline the main unit. Otherwise,
malfunction of the float switch may be caused resulting in water leakage.

• Attach the nut (M10 or W3/8: Procured locally) and the attached washer (Ø34mm) to the hanging bolt.

• Adjust nut position (lower side) so that clearance between (lower side) and the lower side of ceiling board is

137mm.

• Hang up the main unit by hanging nut of hanging bolt to T groove of hanging bracket of the indoor unit.

• Using the level vial, etc., check the horizontal level of the indoor unit.

• Using the installation pattern, check and adjust the positional relation between the indoor unit and ceiling

opening hole, and hanging-up height of the indoor unit.

Hanging bolt
(W3/8 or M10)

Nut
(W3/8 or M10)

Nut
(W3/8 or M10)

(1)Required those other than M10 flat washer at site.
(2)To prevent falling-off of bolt (safety), be sure to set it

just under the hanging bracket as shown in the figure.

(1)
M10 flat washer
(Accessory)

(2)
M10 flat washer
(Accessory)

137mm

Lower surface of ceiling

Hanging bolt
Nut (Upper side)
Washer

(Upper side)
(Hanging bracket

main unit)
Washer

(Lower side)
Nuts (Lower side)

56

• The used screws when attaching the installation
pattern are used again to install the panel.

• Using the ceiling panel fixing screws, fix the
installation pattern
under surface of the indoor unit.

• Fit the ceiling opening size to outside of the
installation pattern.

Opening part

2020

(Ceiling opening
dimension)

695

Outline of indoor unit

<MMU-AP0151SH to AP0241SH>

Check lower side of the indoor unit locates at

Q

position 15mm higher than bottom surface of the
ceiling board. (4 corners)

Check clearance between the side of the indoor

R

unit and the ceiling board is 20mm.
(Both left/right)

Check clearance between the front side (piping

S

side) of the indoor unit and the ceiling board is
110mm, and clearance between rear side of
indoor unit and the ceiling board is 50mm.

50110

Indoor unit

P0151, P0181 : 1160
P0241 : 1360

(Ceiling opening dimension)

15

1

Installation gauge

Front side
(Piping side)

110

Ceiling board

Installation gauge

Lower side of
installation pattern

Installation pattern

Lower surface
of ceiling

Rear side

50

3

• Match the bottom surface of ceiling and lower side of installation pattern on the same level.

Indoor unit

Lower side of
installation pattern

Match on the same level.

Lower surface
of ceiling

Indoor unit

Protruding : 0mm or more

Drawing : 3mm or less

Ceiling board

20

2

Indoor unit

• Fix the indoor unit securely by tightening nut at
upper side.

Level vial

Fix securely

REQUIREMENT

• Using a level vial, etc., confirm the horizontal

level of the indoor unit.

• Tighten the nut sufficiently, and fix it securely.

Installation of ceiling panel
(Sold separately)

Install the ceiling panel according to Installation
Manual after piping/wiring work has completed.

Check that installation of indoor unit and ceiling
opening part is correct, and then install it.

REQUIREMENT

Connect the connecting sections of ceiling panel
and ceiling surface, and the ceiling panel and
indoor unit closely.

If there is clearance, air leakage generates
resulting in dewing or water leakage.

57

6-6. Concealed Duct Type

Installation space

Reserve space required for maintenance the indoor unit and service work.

700mm *1 700mm *1

Air outlet

Electric parts box

Ceiling opening size C

Air outlet

Check port B

450mm

Air filter

700mm for maintenance of air filter 700mm for

Ceiling opening part

(150mm)

maintenance of air filter

Check port A

450mm

300mm

400mm (Min.)

Electric parts box

Ceiling opening

size D

Air filter

25mm

Notes)

*1 Be sure that space with 700mm or more is

reserved for attachment/detachment at the
taking-out direction of the air filter.

*2 Be sure to set a check port (A) for the refrigerant

piping, drain piping, maintenance of drain pan,
etc; otherwise maintenance for devices is
unavailable.

*3 If the taking-out direction of the air filter is set at

the left side, be sure to set a check port (B) at the
left side of the set for attachment/detachment of
the air filter. If there is no check port (B), the air
filter cannot be attached or detached.

*4 Be sure to set a ceiling opening for maintenance

of the electric ports such as fan motor; otherwise
maintenance for electric parts such as fan motor
is unavailable.

MODEL MMD-AP

Set width (mm)
Air filter width (mm)
Ceiling opening size C
Ceiling opening size D

0071BH to 0121BH 0151BH to 0181BH 0241BH to 0301BH 0361BH to 0561BH

550 700 1000 1350
508 655 960 (480∗2) 1310 (655∗2)
600 750 1050 1400
470 470 470 470

Installation under high-humidity atmosphere

In some cases including the rainy season, especially inside of the ceiling may become high-humidity atmosphere
(dew-point temperature: 23°C or higher).

1. Installation to inside of the ceiling with tiles on the roof

2. Installation to inside of the ceiling with slated roof

3. Installation to a place where inside of the ceiling is used for pathway to intake the outside air

• In the above cases, additionally attach the thermal insulator (Glass wool, etc.) to all positions of the air
conditioner, which come to contact with the high-humidity atmosphere. In this case, arrange the side plate
(Service plate) so
that it is easily removed.

• Apply also a sufficient thermal
insulation to the duct and
connecting part of the duct.

[Reference] Dewing test conditions

Indoor side: 27°C dry bulb temperature

24°C wet bulb temperature

Air volume: Low air volume, operation time 4 hours

58

External view

129

110

240

Knock-out hole Ø125
(Air take-in port)

<Air outlet side>

Hanging bolt pitch B

Main unit dimension A

215

Drain pipe connecting port for vinyl chloride pipe
(Inner dia. 32, VP. 25)

Refrigerant pipe
connecting port
(Gas side ØF)

Hanging bolt
4-M10 screw
(Arranged locally)

44
49

Main unit dimension 800

75

41

Hanging bolt pitch 700

50

131

50

393

196

59

174

320

638

498

41

243

6-Ø4 Tapping screw hole Ø160

• Wired remote controller
(RBC-AMT21E)

4

2.7

120

120

Main unit dimension A

16

C

<Air inlet side>

Hanging bolt pitch B

D

AP0071BH, AP0091BH, AP0121BH
AP0151BH, AP0181BH
AP0241BH, AP0271BH, AP0301BH
AP0361BH, AP0481BH, AP0561BH

240

Model MMD-

Refrigerant pipe connecting port
(Liquid side ØG)

Hanging bolt
4-M10 screw
(Arranged locally)

Ø26 Power supply,
remote controller cable take-out port

ABCDFG

550 616 350 470 9.5 6.4
700 766 500 620 12.7 6.4
1000 1066 800 920 15.9 9.5
1350 1416 1150 1270 15.9 9.5

Opening hole on ceiling and placing of hanging bolt

• Considering the indoor unit and the hanged-up piping/wiring work, determine the installation position and
direction.

• After installation position of the indoor unit has been determined, open a hole on the wiring and place the
hanging bolt.

• For opening size of the ceiling and the hanging bolt pitch, see the external view.

• When the ceiling has already boarded, draw the drain pipe, refrigerant pipe, inter-unit wire between indoor and

outdoor units, central control system wire, and remote controller wire up to the position where pipes and wires
are connected before hanged-up the indoor unit.

The hanging bolts and nuts will be procured locally.

Hanging bolt

Nut

M10 or W3/8
M10 or W3/8

4 pieces

12 pieces

Setup of outside static pressure

Be sure to set up a tap change based upon the
resistance (External static pressure) of the duct to be
connected.

To change the external static pressure, setup the
item code (DN) from wired remote controller is
necessary. (Item code = [5d])

For details of procedure, refer to the section of

“13-1”.

<Change on wired remote controller>

Setup data

0000
0001
0003
0006

*1: 65Pa for Model AP0481BH, AP0561BH
*2: 90Pa for Model AP0481BH, AP0561BH

Outside static pressure

40Pa Standard (At shipment)
70Pa *1 High static pressure 1
100Pa *2 High static pressure 2
20Pa High static pressure

59

6-7. Concealed Duct High Static Pressure Type

Duct design

1. In order to prevent short circuits, design the duct

work so that the intake and discharge openings
are not adjacent to each other.

2. The indoor unit does not have a built-in air filter.

Always install the air filter (Local procure) in a
location that permits easy maintenance, such as
behind the intake grille. (If no air filter is installed,
dust will collect in the heat exchanger, which may
cause the air conditioner to fail or to leak.)

<Air supply connecting flange>

MMD-AP0181H to AP0241H

12

226

12

4-Ø8 hole

25 25

12

400

426 12

200

25 25

<Overview of duct connection>

NOTE : Parts except air conditioner unit are to be

locally procured.

Canvas joint Canvas joint

(Air conditioner)

Silencer
chamber

Air supply port

Silencer chamber

Check port

Air inlet

Air filter

<Air return connecting flange>

MMD-AP0181H to AP0361H

25 25

6-Ø8 hole

25 275

550

25 25290

275 25

316 1212

MMD-AP0361H

25 25

6-Ø8 hole

12

MMD-AP0481H

25 25

8-Ø8 hole

12

316

670

348

348 12

770

164 316 12

200

25 25

200

25 25

12

226

12

12

226

12

MMD-AP0481H

25 25

8-Ø8 hole

25 300

900

300 300

316 1212

25 25290

25

REQUIREMENT

If the air conditioner unit and the canvas joint are connected with the rivets, the fan and the refrigerating cycle
become unavailable to be checked. Be sure to use the bolts for tightening the flange.
(Fixing bolts M6 × 12 Field-supplied)

60

For reference

<Square duct> (Procured locally)

MMD-0071BH to 0561BH

Return Air side

G-Ø5 mm holes G-Ø5 mm holes

Supply Air side

For supply
air side

For return
air side

C
B

A

18 18

2828

25

18

F15

A

Model MMD-

AP0071BH to AP0121BH

Return Air side

(Return filter side)

AP0151BH to AP0181BH
AP0241BH to AP0301BH
AP0361BH to AP0561BH
AP0071BH to AP0121BH

Supply Air side

AP0151BH to AP0181BH
AP0241BH to AP0301BH
AP0361BH to AP0561BH

28

28

D

A

18 18

28

25

25 25

JJ

H

E

I

28

18

2828

25

K

25

18

F15

A

K

25 25

JJ

H

28

25

E

I

28

18

25

JKIHGFEDCBA

—

700
1000
1350

550
850
1200

—

700
1050

455 (65 x 7)
715 (65 x 11)
1105 (65 x 17)

400
430
580

65
65
65

—
—
—

530
830

1180

420
420
420

265
265
265

390
390
390

245
245
245

4
8
8

20
28
40

350
500
675

275
425
600

195
195
195

132.5

132.5

132.5

350
525

227.5

307.5

552.5

—
—
—

130
130
130

External view

Installing the four 10mm-diameter hanging bolts

• Space the hanging bolts according to the dimensions shown in the diagrams below .

• Use 10mm-diameter hanging bolts (Required at the site).

Refrigerant pipe connecting port

MMD-AP0181H to AP0481H

A (Bolt pitch)

4-Ø10

C

D (Bolt pitch)

hanging bolt
(Local procure)

B (Size of main unit)

Drain pipe connecting port

Model MMD-

AP0181H to AP0361H

AP0481H

61

ABCD

800mm 850mm 660mm 700mm

1060mm 1200mm 1288mm 1328mm

(Gas side)

660

(Size of main unit)

105

110 60

4090

380

30

Refrigerant pipe
connecting port
(Liquid side)

<Treatment of ceiling>

A ceiling is treated differently according to the structure of the building. For details, contact the constructor or the
interior finish worker.

For treatment of the ceiling board after removal, it is important to reinforce the ceiling (Framework) so as to
prevent the ceiling board from vibration and to keep the level of the existing ceiling correctly.

Installation of hanging bolt

Use M10 hanging bolts (4 pcs, to be local procure).
Matching to the existing structure, set pitch according to size in the unit external view as shown below.

New concrete slab

Install the bolts with insert brackets or anchor
bolts.

Reinforcing
steel

(Blade type

bracket)

(Slide type

bracket)

Anchor bolt

(Pipe hanging

anchor bolt)

Use existing angles or install new
support angles.

Steel flame structure

Hanging bolt

Hanging bolt Support angle

Existing concrete slab

Use a hole-in anchors, hole­in plugs, or a hole-in bolts.

Installation of remote controller (Sold separately)

For installation of the remote controller, follow to the Installation Manual attached to the remote controller.

• Do not put the remote controller on the place where is exposed to direct sunlight or near a stove, etc.

Wire connection change of fan motor

Connecting wire of the fan motor has been connected to [F2] [External static pressure 14mmAq (137Pa)] at shipment
of the factory.
If it is necessary to change the external static pressure in accordance with duct resistance, change the connection.

MMD-AP0181H to AP0481H

The brown lead wire is attached to AP0481H.
(Pay attention to change the wiring.)

FM

Fan motor

Orange (at shipment of factory)

Lead wire for changing the external static pressure
When changing the external static pressure is
necessary, change connection of this lead wire.

Terminal clock No.

F1
F2
F3
F4

Blue

Black

Orange

Brown

F1 F2 F3 F4

AP0181H to AP0361H AP0481H

Blue (50/60Hz)
Orange (50/60Hz)

Black (50Hz/60Hz) Black (60Hz)

Capacitor

Fan motor wiring

Model MMD-

Brown (50Hz)

Control P.C. board

4P terminal block

Electric parts box

2P terminal block
(Power supply)

If changing the external static
pressure, write the static
pressure after change in the
nameplate of the unit.

External static pressure

(Pa) mmAq

(69) 7
(137) 14
(196) 20
(196) 20

REQUIREMENT

Remarks

——

Setting from factory

——
——

NOTE :

If changing the external static pressure, write the static pressure after change in the nameplate of the unit.

62

6-8. Under Ceiling Type

Installation space

Secure the specified space in the
figure for installation and servicing.

Height of ceiling

Set the installable height of the ceiling within 4m,
otherwise the air distribution will become poor.

If height of ceiling exceeds 3.5m, hot air becomes
difficult to reach the floor surface, and then the
change of setup of high ceiling is necessary.

When incorporating a filter sold separately, the
change of setup of high ceiling is also necessary.

For the change method of high ceiling, refer to the
application control, “In case of installation to high
ceiling” and “In case of incorporating filter sold
separately” in this Manual.

List of installable ceiling height

Setup data

0000
0001

According to the conditions of installation, setup time
of turning-on of filter sign (notification of filter
cleaning) of the remote controller can be changed.

When it is difficult to warm up the room due to
installation place or structure of the room, the
detection temperature of heating can be raised.

For change the setup time, refer to the application
control, “Change of filter sign turning-on time” and
“How to increase the heating effect” in this Manual.

In case of wireless type

Decide the position which remote controller is
operated and the installation place.

And then refer to the Installation Manual of the
wireless remote controller kit sold separately.

(The signal of the wireless type remote controller can
be received within approx. 8m. This distance is a
criterion and varies a little according to capacity of
the battery, etc.)

• To prevent malfunction, select a place where is not
affected by a fluorescent lamp or direct sunlight.

• Two or more (up to 6 units) wireless-type indoor
units can be set in a room.

Standard (At shipment)
High ceiling 1

3.5m or less

4.0m or less

250 or more250 or more

500 or more

Before installation

1. Removal of suction grille

Slide the suction grille fixing knobs (two positions)
toward the arrow direction, and then open the
suction grille.

Under the condition of suction grille opened, push
the hook section of hinges (two positions) at the
rear side, and then pull out the suction grille.

Pull out suction grille
while pushing hook.

Hinge

Slide

Suction grille
fixing knob

2. Removal of side panel

After removing the side panel fixing screws (1
each at right and left), slide the side panel forward
and then remove it.

Side panel

Slide forward.

Suction grille

Protector

Level flap

Approx. 8m

3. Removal of protective vinyl

Peel out the protective vinyl on the level flap.

4. Removal of protector

Remove the protectors (2 pcs.) of the fan.
(MMC-AP0241H, AP0271H only)

63

External view

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.

• Do not apply force to the other parts (refrigerant pipe, drain pan, foamed parts, or resin parts, etc.).

• Carry the package by two or more persons, and do not bundle it with PP band at positions other than specified.

128
84

170320

(Hanging position)

Hanging bolt

50

Within

Upper pipe draw-out port (Knockout hole)

Power supply cable take-in port (Knockout)

Remote controller cable take- in port
(Knockout hole)

53

Left drain size

B (Hanging position)

Refrigerant pipe (Gas side ØD)

Ceiling surface

Unit

Refrigerant pipe
(Liquid side ØC)

A

216

110

70

75 97

76

50

130

680

Drain pipe connecting port

146

145

Pipe hole on wall (Ø100 hole)

210

167

105

347

262

135 84

Outside air take-in port
(Duct sold separately)(Knockout hole Ø92)

Pipe draw-out port (Knockout hole)

Drain port VP20
(Inner dia. Ø26, hose attached)

114

41

200 (Liquid pipe)

216 (Gas pipe)

Remote controller cable take- in port

Power supply cable take-in port (Knockout hole)

Remote controller cable take- in port

90

32

(Knockout hole)

92

Drain left pipe draw-out port (Knockout hole)

32

171

Wireless sensor
mounting section

Model MMC- A B C D
AP0151H, AP0181H
AP0241H, AP0271H
AP0361H, AP0481H

910
1180
1595

855
1125
1540

Ø6.4 Ø12.7

Ø9.5 Ø15.9

Considering pipe/wire connecting work inside the ceiling after the indoor unit has been hanged, select an
installation place and determine piping direction.

• If the ceiling has already been set before hanging the main unit, prepare refrigerant pipe, drain pipe, indoor
connecting wire, remote controller cord, etc. up to the place where pipe and wire can be connected.

• Check the size of the indoor unit, and match the indoor unit size using the attached installation pattern.

How to use attached installation pattern

Using the pattern, positioning of the hanging bolt and
pipe hole can be performed.

* As an error to some degree may generate on the

pattern size due to temperature and humidity, be
sure to confirm the size.

Installation
pattern

Ceiling surface

Wall face

64

Installation of hanging bolts

Rear cover

Grooves

Opened when refrigerant pipe
is taken out from the rear side

Opened when only drain pipe
is taken out from the rear side

100

Pipe knockout hole

Use M10 hanging bolts (4 pcs, to be local procure).
Matching to the existing structure, set pitch
according to size in the unit external view as shown
below.

New concrete slab

Install the bolts with insert brackets or anchor bolts.

Rubber

(Blade type

bracket)

Use existing angles or install new support angles.

(Slide type

bracket)

Steel flame structure

Hanging bolt

Hanging bolt Support angle

Existing concrete slab

Anchor bolt

(Pipe hanging

anchor bolt)

• In case of taking pipe from the rear side

* Cut off the groove section with a plastic cutter,

etc.

• In case of taking pipe from right side

* Cut off the groove section with a metal saw or

plastic cutter, etc.

Groove

Use a hole-in anchors, hole-in plugs, or a hole-in bolts.

Draw-out direction of pipe/cable

• Decide installation place of the unit and draw-out
direction of pipe and cable.

Knockout hole of power cable take-in port

Open the power cable take-in port (Knockout hole)
shown in the external view and then mount the
attached bushing.

Side panel (Right)

• In case of taking pipe from left side

Taking pipe from left side is applied only to the
drain pipe.

The refrigerant pipe cannot be taken out from
the left side.

* Cut off the groove section with a metal saw or

plastic cutter, etc.

Groove

Side panel (Left side))

• In case of taking pipe from upper side

Taking pipe from upper side is applied only to
the refrigerant pipe.

When taking out the drain pipe from the upper
side, use a drain up kit sold separately.

Open the upper pipe draw-out port (Knockout hole)
shown in the external view.
(Knockout hole of thin plate)

After piping, cut off the attached thermal insulator
of the top plate to pipe shape, and then seal the
knockout hole.

65

Installation of indoor unit

• Preparation before holding down main unit

* Confirm the presence of the ceiling material

beforehand because the fixing method of
hanging metal when the ceiling material is set
differs from that when the ceiling material is not
set.

<There is ceiling material>

Hanging bolt
(Procured locally)

Ceiling surface

Indoor
unit

Washer (Accessory)

2) Hang the unit to the hanging bolt as shown the
figure below.

Double nut

Hanging
metal

Nut
(Procured locally)

Indoor
unit

Hanging
metal

(Procured locally)

Hanging bolt
(Procured locally)

Ceiling surface

Washer (Accessory)

Double nut
(Procured locally)

* Tighten the hanging metal with upper/lower nuts

as shown in the figure.

<There is no ceiling material>

Hanging bolt
(Procured locally)

Washer

Indoor
unit

(Procured locally)

Washer (Accessory)

Double nut
(Procured locally)

• Holding down of main unit

1) Attach washer and nuts to the hanging bolt.

Ceiling surface

20 to 30

Washer
(Accessory)

Hanging bolt

Double nut
(Procured locally)

3) As shown in the figure below, fix the ceiling
material securely with the double nuts.

REQUIREMENT

• The ceiling surface may not be

horizontal. Be sure to confirm that width
and depth directions are level.

Installation of remote controller
(Sold separately)

For installation of the wired remote controller, follow
the Installation Manual attached with the remote
controller.

• Pull out the remote controller cord together with the
refrigerant pipe or drain pipe.
Be sure to pass the remote controller cord through
upper side of the refrigerant pipe and drain pipe.

• Do not leave the remote controller at a place
exposed to the direct sunlight and near a stove.

• Operate the remote controller, confirm that the
indoor unit receives a signal surely, and then install
it. (Wireless type)

• Keep 1m or more from the devices such as
television, stereo, etc.
(Disturbance of image or noise may generate.)
(Wireless type)

66

6-9. High Wall Type

Installation space

Reserve space required to install the indoor unit and
for service work.

Keep 300mm or more for clearance between top
plate of the indoor unit and the ceiling surface.

300 or more

300 or more300 or more

The transport brackets are provided. Following to the table, remove the brackets according to direction of pipe.
(Left, right, center) (For AP0071H to AP0181H, only (left) and (right) transport brackets are provided.)

Pipe side piping

Parts to be removed

Right side piping

Remove transport bracket (right) only.

Rear side piping

Left side piping

Remove all transport brackets.

REQUIREMENT

After removing of the transport brackets, do not
apply force on the lower cabinet. It is to prevent
deformation and breakage.

Pipe connecting position

<Front view>

Top end of installation plate

24

Liquid side

Gas
side

75

50

60

Drain pipe

110

• Remove the installation plate.

Transport bracket
(Right)

(Including installation plate)

368

76

210

Left and
right side piping
(Knockout hole)

77

Transport bracket
(Center)

Installation plate (Accessory)

Refrigerant pipe connecting port
liquid side B

Refrigerant pipe connecting port
gas side A

380

450

480

Installation plate

Ø20

Drain pipe
connecting port

Transport bracket
(Left)

<Bottom view>

Shipping from factory (Left side piping)

Gas pipe 440
Liquid pipe 540
Drain pipe 560

20

67

Model MMK-

AP0071H to AP0121H

AP0151H, AP0181H

AP0241H

AB

Ø9.5 Ø6.4
Ø12.7 Ø6.4
Ø15.9 Ø9.5

The lighting time setup of the filter sign (Notification of filter cleaning) of the remote controller can be changed

8m or less

Screen

Good installation place
Cooled well all over.

Bad installation place
: Not cooled well.

according to the condition of installation. If the room is not heated due to the installation place or construction of
the room, the detection temperature of heating can be raised.

For setup method, refer to “Change of lighting time of filter sign” and “To secure better effect of heating” in the
Applicable controls of this Manual.

In case of wireless type

The sensor of indoor unit with wireless remote controller can
receive a signal within approx. 8m. Based upon it, determine
a place where the remote controller is operated and the
installation place of the indoor unit.

• To prevent a malfunction, select a place where is not
influenced by a florescent light or direct sunlight.

• Two or more (Up to 6 units) indoor units with wireless
remote controller can be installed in the same room.

Installation 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 PP 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 × mark in the
following figure.

68

• To increase effect of drain, confirm the unit is
installed horizontally or slightly lowering rightward
viewed from the front side.

• The mass including installation plate of the indoor
unit is shown in the following table. Check whether
the wall has sufficient intensity.

Lowering rightward viewed
from the front side

Horizontal installation

Lowering leftward viewed
from the front side

• Do not install the unit by plugging in the wall.

Indoor unit

Model MMK­0071H to 0121H
0151H to 0181H

0241H

Mass (kg)

20
22
29

• When installing the side plate, check the status that
hook is inserted in square hole. Push in the side
plate until it is stuck closely to the indoor unit.

Hook

Square hole

Screw cap

Side plate fixing screws

Installation of installation plate

• Using the installation pattern, determine the installation position of the indoor unit, and drill the pipe hole
matching with the position indicated in the installation pattern. When passing the refrigerant pipe through wall
using metal mesh, be sure to use insulation sleeve such as polyvinyl chloride pipe.

n In case of wooden construction (Wide wall)

(1) Determine vertical position of the installation plate by interval (height) between the indoor unit and the ceiling.
(2) Determine the position so that screw hole of installation plate locates at the center of pillar or stud by adjust-

ing left/right position without changing height of the installation plate.

(3) Tighten the screws (accessory parts) after bore preholes with a gimlet in the stud to prevent the crack.

n In case of reinforced concrete construction

(1) After drilling holes with interval by 150mm at the

selected positions on the concrete wall, strike in grip
anchor or hole-in anchor.

(2) Fix the installation plate to the anchor with bolt or nut.

However, when using hole-in anchor, adjust drilling
depth so that screw head-out is 10mm or less.

Grip anchor

Bolt

Installation plate

Concrete

wall

Hole-in anchor
Nut
screw
dia. Ø8

Installation
plate

10mm
or less

Concrete

wall

REQUIREMENT

• Conduit tube may be buried in the concrete wall. Ask the constructor it.

• Before installation of the indoor unit, be sure to check whether the installation plate has been completely

installed.

n In case of rear direction piping

Using the installation pattern, determine the pipe hole position, and drill a pipe hole slightly lowering downward.

69

Installation of indoor unit

n In case of rear and right direction piping

(1) Pass the drain pipe through the wall hole, and hang the indoor unit

to the top end of the installation plate.

(2) Check that top end of the installation plate is inserted in by moving

the indoor unit to left and right sides.

(3) Fix bottom end of the installation plate and the lower cabinet with

screw so that the indoor unit does not move.

n Removing of indoor unit right side plate

Remove the right side plate as the following procedure.
(1) Remove two side plate fixing screws.
(2) Remove the side plate by turning the gray colored part counter-

clockwise to remove hooks in the square hole of the suction grille.

(3) When piping is in direction from right side, cut off the knockout of

the side plate with knife, etc, and finish the end face.

Hook

2

Hang up

Installation
plate

Screwing

Square hole

Lower cabinet

Screw cap

1

Side plate
fixing screws

n In case of rear direction piping n In case of right direction piping

• Insert the right side plate observing click of the side
plate. (Refer to right side plate installation

Be sure to support A part with
hands while pipe is formed.

A

n In case of left direction piping

Work after removing the lower cabinet.
(1) Remove the left/right side plates.
(2) Remove two screws of the lower cabinet.
(3) Pull the lower cabinet toward you lowering a little.

drawing.)

• Fix the side plate, and cover the screw head with
attached cap.

Be sure to support A part with
hands while pipe is formed.

Knockout of right side plate

Side face

Turn it upward/downward.

Do not turn
horizontally.

Knockout of
left side plate

Open

70

6-10. Floor Standing Cabinet Type

Front panel screwsFan guard screws

<Good installation> <Poor installation>

Installation space and service space

500mm or more

Front side

1000mm or more

(In case of right direction piping)

200mm
or more

Front side

<Indoor unit>

• Install an indoor unit as described below.

1. Prior to piping or electric work, remove the air inlet grille.
(Push down the upper part slightly and pull it toward you.)

2. Remove the front panel.
(Fixing screws at right and left sides of the lower side)

3. Remove the fan guard.
(Fixing screws at right, center and left sides)

4. Then start piping and cabling works.

5. Keep the front space of the indoor unit as wider as possible.
A wide space is required for maintenance and service works and then it is useful for distributing cool/hot air in
the room resulted in increase of cooling/heating effect.

6. Install the indoor unit horizontally or slanting a little rightward viewed from the front side.

How to remove the panel before piping and electric wiring

1. Remove the air inlet grille (4 hooks at top and bottom each) and then remove the fan guard (6 screws) for
piping work.

2. Remove the front panel (2 screws) for wiring work

Fan guard

Front panel

Air inlet grile

Hock

Hock

Hock

Hock

71

6-11. Floor Standing Concealed Type

700mm 125mm

215mm

133

mm

440mm57

mm

520mm

Tighten the lower two
nuts after the unit has
been mounted.

Mount the upper two
nuts as shown in the
figure below.

Before installation

REQUIREMENT

• A drain filter to prevent drain clogging is attached to the indoor unit. Since the drain filter is attached outside of
the unit, clogging due to dust, foreign matters may occur during work, be sure to clean the strainer before
delivery. Please clean the drain filter in the periodical check.

• The air filter is provided under the main unit. Be sure to clean air filter before delivery.

Installation space

Model MML- A

AP0071BH to AP0121BH 610
AP0151BH to AP0241BH 910

and remove the air filter.

Installation of indoor unit

1. Carry in the indoor unit as packaged up to installation place.

Air filterPull air filter to the arrow mark,

220

or more

Service space

( ) ( )

at power source

2. Remove foamed polystylene cushion for protection during
transportation, which is entered under left/right side plate of the
main unit and electric parts box.
Also, when installing the unit, remove tape for transportation
adhered to the electric parts box.

3. Install the indoor unit before lining the wall.

<Fixing of unit>

Fix the indoor unit to the floor and wall by attaching two or four M8
anchor bolts to the position in the following figure to tighten and fix

Tape for transportation

Electric parts box

Foamed polystylene
cushion

with nut utilizing holes at left/right side plates.

Foamed polystylene cushion
(Both left and right)

In case of fixing the indoor unit to wall

Fix the indoor unit to the wall as described below.

1. Referring to the following figure, fix four M8 anchor bolts to the wall.

2. As shown in the figure, attach the bolts preciously to the upper two anchor bolts.

3. Using a screwdriver, etc, open knockout hole at rear side of the indoor unit.

4. Hang the indoor unit to the anchor bolts.

5. Tighten the nuts to the two lower anchor bolts.

70

A

220 or more

Service space
at pipe side

In case of fixing the indoor unit to floor

To fix the indoor unit to the floor, pass two anchor bolts attached
on the floor through a hole of the bottom plate of the indoor unit,
and then tighten and fix it with the nuts.

1 to 2mm

15mm MAX

Screwdriver

Knockout hole

Anchor bolts (two at left and right)

Rear

150mm

Front

400mm 275mm

72

External view

Hole for floor fixing
(2-Ø10)

Lower refrigerant piping port
(50 × 100 knockout hole)

400

120

15024020035

Air outlet port

155

Air inlet port

Space required for service

(Figure shows piping at the right side)

Wall

(Front side)

500

1000 or more

or more

950

300

or more

(Front side)

130

Operation switch section
(Sold separately)

260 230690

630

Refrigerant pipe port
(50 × 100 knockout hole)
(Both sides)

Wall

Drain pipe
connecting port
(Ø20)

10 × 20 long hole

Hole for wall
fixing × 2

(with Ø22
knockout hole)

Power supply
cord hole
(Ø26 knockout)
(Both sides)

35

70

30

130

100

( )

left side

50

Dimensions

Model MML- B
AP0071H, AP0091H, AP0121H
AP0151H, AP0181H
AP0241H

97

35

Refrigerant pipe
connecting port
(Liquid side ØA)

Refrigerant pipe
connecting port
(Gas side ØB)

177

Piping positional drawing

97

Hole for
wall fixing
(2-12 × 25
long hole)

120

Refrigerant pipe port
(Ø130 knockout hole)

A

Ø6.4
Ø6.4
Ø9.5

700
520

13344057

Ø9.5

Ø12.7
Ø15.9

200 18

110

1365

Installation of remote controller (Sold separately)

For installation of the wired remote controller, follow the Installation Manual attached with the remote controller.
For installation of the wireless remote controller, follow to the Installation Manual attached to the remote controller.

• Do not put the remote controller on the place where is exposed to direct sunlight or near a stove, etc.

• Operate the remote controller, check the indoor unit surely receives the signal, and then install the remote

controller. (Wireless type)

• Install the remote controller 1m apart from the devices such as TV or stereo. (Image may be disturbed or noise may
be output.) (Wireless type)

73

In case of fixing indoor unit to floor

In case of fixing indoor unit to wall

<Indoor unit viewed from overhead>

(Front side)

A
B

Model MML- A B

AP0071BH to AP0121BH 580 610
AP0151BH to AP0241BH 880 910

110

220

<Indoor unit viewed from front side>

(Floor)

A
B

Model MML- A B

AP0071BH to AP0121BH 580 610
AP0151BH to AP0241BH 880 910

600

140 315

Hole is provided
to rear side.

Attach and fix the electric parts box to the wall under condition that electric parts box to be attached to the side

*

face is removed. Remove the electric parts box as follows.

<How to remove the electric parts box>

1. Remove two mounting screws at upper side of the electric parts box.

2. Slide the electric parts box to the arrow mark, and remove it from the set.

Installation of remote controller (Sold separately)

For installation of the wired remote controller, follow to the Installation Manual attached to the remote controller.

• Pull out the remote controller cord together with the refrigerant pipe or drain pipe. Be sure to pass the remote
controller cord through upper side of the refrigerant pipe and drain pipe.

Electric
parts box

Electric parts box
mounting screws
(2 pcs)

Electric parts box

Side plate
fixing screw

Side plate

74

Installation space

(In case of right direction piping)

500mm or more

1000mm

or more

200mm
or more

Front side

Front side

<Installation space>

REQUIREMENT

When using the air conditioner under condition of
high humidity, attach the thermal insulator to the
side face and the rear side of the indoor unit.

Unit fixing bolt

• In case of wooden wall and wooden floor (AP0151 Model to AP0271 Model)
Use the four screw bolts (M8 × L50) for transportation and the two screw bolts attached to inside of the indoor unit.

• In case of wooden wall and wooden floor (AP0361 Model to AP0561 Model)
Use the two screw bolts (M8 × L50) for transportation and the four screw bolts attached to inside of the indoor unit.

• In case of models other than the above
Procure the six anchor bolts (M8 × L50 or longer) at the local site.

In case of fixing the indoor unit to the wall surface

Use the attached wall fixing bracket by inverting it at
upper side of the unit. Fix the indoor unit to the wall
surface using the attached screw bolts, anchor bolts
or etc. at two positions. A many holes for fixing the
indoor unit to wall surface and for fixing the indoor
unit itself are provided on the bracket. Sliding the
bracket right and left sides, select a position which
can securely fix the indoor unit and then fix it.

Screw bolts

Wooden wall

Concrete wall

Anchor bolts

A hole on the wall fixing bracket for the indoor unit is
a long hole. Therefore the indoor unit can be fixed at
any position keeping clearance from 0 to 50mm.

As shown below, it is also possible to fix the indoor
unit without inverting the bracket. (In this case, keep
clearance with length of head of the bolt between the
indoor unit and the wall.)

1770mm

(Fixing height of screw

bolt and anchor bolt)

50mm0mm

1730mm

(Fixing height of screw

bolt and anchor bolt)

Clearance
(Height of head
of fixing bolt)

75

In case of fixing the indoor unit to the floor

Use the attached the attached floor fixing bracket to fix the lower right and left sides of the indoor unit to the floor.
To fix to the indoor unit, use the side plate screws and use the screw bolts or anchor bolts for fixing to the floor
respectively, and then fix the indoor unit at total four positions, two positions for right and left each.

Screws bolts
(Total 4 at right and left)

Screws for
side plate

Wooden wall

Screws for
side plate

640mm

Concrete wall

Anchor bolts
(Total 4 at right
and left)

A

Indoor unit fixing figure (Example)

REQUIREMENT

In case of installing the indoor unit to the floor and
the wall other than wooden floor and wall, the six
anchor bolts (M8 × L50 or longer) are required.
Procure them at the local site.

Model MMF-

AP0151H to AP0271H type
AP0361H to AP0561H type

B

A mm

88

258

B mm

42 to 92

52 to 102

Bracket for
fixing to wall

Air inlet grille

Electric
parts cover

Bracket for
fixing to floor

Direction of vertical louver

The direction of the auto turn louver (Vertical louver)
may change during transportation. As shown below,
lift up the vertical louver lightly, turn it matching with
the direction of the plastic coupling rod, insert it into
clearance of the extrusion, and then arrange the
direction of the vertical louver to the desired direction.

Turn the vertical louver
while lifting up lightly,
and then insert it into the
clearance of extrusion of
the coupling rod.

Vertical louver
Extrusion
Coupling rod

Installation of remote controller (Sold separately)

For installation of the wired remote controller, follow the Installation Manual attached with the remote controller.
For installation of the wireless remote controller, follow to the Installation Manual attached to the remote

controller.

• Draw out the remote controller cord together with the refrigerant pipe or drain pipe. Be sure to put the remote
controller cord at upper side of the refrigerant pipe or drain pipe.

• Do not put the remote controller on the place where is exposed to direct sunlight or near a stove, etc.

• Operate the remote controller, check the indoor unit surely receives the signal, and then install the remote

controller. (Wireless type)

• Install the remote controller 1m apart from the devices such as TV or stereo.
(Image may be disturbed or noise may be output.) (Wireless type)

76

7. FLOW SELECTOR UNIT INSTALLATION

This SUPER HRM 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.

Be sure to use an indoor or outdoor unit in combination with the new refrigerant.

• This Flow Selector unit is for the new refrigerant HFC (R410A).

• To connect the Flow Selector unit to an outdoor unit with pipes, a branching joint or header is required. Choose

one according to the capacity of the units.

• Nitrogen gas is filled in the selection unit.
Be careful when removing flare nuts.

7-1. Accessory Parts

Part name

Installation Manual 1 1 — (Be sure to hand ov er to custom ers .) Attached pipe 2 —

Attached wire
(For pow er supp ly )

Attached wire
(For control wiring)

Heat insulating pipe 3 3

Heat insulating pipe 2 2

Q'ty RBM- Q'ty RBM-

Y1121FE Y1801FE

11

11

Shape Usage Part name

For pow er su pp ly from indoor u ni t
(3-core, 6m)

For commun icat ion with indoor uni t
(5-core, 6m)

For heat i nsu la ting of su ct ion ga s,
discharge gas, and ga s p ipe
connecting secti ons

For heat i nsu lati ng of liqu id p ipe
connecting secti on

Attached pipe 2 —

Attached pipe 1 —

Attached pipe 1 —

Wire joint 2 2

Y1121FE Y1801FE

Shape Usage

Ø9.5 - Ø6. 4
connection pipe

Ø15.9 - Ø12 .7
connection pipe

Ø15.9 - Ø9.5
connection pipe

Ø12.7 - Ø9.5
connection pipe

For connect io n wi th
certain indoor units

7-2. Installation Space

• Make space for installation and service. (Make space to the electrical parts box cover side for service.)

• When installing the unit inside the ceiling, be sure to create a check port.

The check port is required when the unit is installed and serviced. (Check port: 450*450 or more)

• Keep a clearance of 50 mm or more between the top panel of the unit and the ceiling.

• The length of a connection pipe to the indoor unit should be 5m or less when the attached wires are used.

15m as the maxium length by using the connection cable kit. (RBC-CBK15FE, sold sepalatrly.)

<RBM-Y1121FE (When attached pipes are used)>

(156) (159)

(118)

(159)

300 or more

or

50

more

more

(118)

300 or more

or

50

<RBM-Y1121FE, RBM-Y1801FE>

or

50

more

or

50

more

200 or more200 or more

Outdoor unit side

Refrigerant pipe
connecting port
(Discharge gas)

Refrigerant pipe
connecting port
(Liquid)

Refrigerant pipe
connecting port
(Suction gas)

77

500 or more

Indoor unit side

or

50

more

Refrigerant pipe
connecting port
(Liquid)
Refrigerant pipe
connecting port
(Gas)

Hanging bracket

Electrical parts
box cover

Check port,
450 × 450

7-3. Installation of Flow Selector Unit

WARNING

Install the unit securely in the place that
can withstand the weight of the unit.

If the foundation is not sturdy enough, the
unit may fall and cause personal injury.

In case of an earthquake, install the unit
as specified.

Improper installation may cause the
unit to fall.

REQUIREMENT

To prevent damage on the Flow Selector unit or personal injury, follow the instructions below.

• Do not step, or put any heavy object on the packed Flow Selector unit.

• It is recommended that the Flow Selector unit be carried as it is packed.

When carrying the unpacked Flow Selector unit for an unavoidable reason, use a cloth for unit protection.

• When carrying the Flow Selector unit, hold the two hanging brackets and be careful not to apply excessive

force to the refrigerant pipes.

External view

Outdoor unit side

Refrigerant pipe connecting port
(Discharge gas)

Refrigerant pipe connecting
port (Liquid)

320 (Hanging bolt pitch)

250

Indoor unit side

Refrigerant pipe connecting
port (Liquid)

Refrigerant pipe connecting
port (Gas)

Refrigerant pipe connecting port
(Suction gas)

160

57

157

39

21

44

87

190

(94)

(99)

(55)

These coils are
on Y1801FE only .

(99)

(55)Earth screw

Hanging bracket

31

79

54

75

78

Installing hanging bolts

• Considering piping and wiring work after hanging the Flow Selector unit, determine the installation position and
direction.

• After determining the installation position of the Flow Selector unit, install the hanging bolts.

• For hanging bolt pitch, see the External View.

• When the ceiling is already installed, draw the pipes to the position where they are to be connected before

hanging the unit.

Procure hanging bolts and nuts locally for installing the unit.

Hanging bolt

M10 or W3/8

2 pieces
Nut
Flat washer

M10 or W3/8

M10

6 pieces

4 pieces

Ceiling preparation

Because ceiling preparation depends on the building structure, consult with the architect or interior finisher.
After removing the ceiling panels, it is important to reinforce the ceiling frames to prevent ceiling panel vibration

and to keep the ceiling horizontal.

Installation of hanging bolt

Use M10 hanging bolts (4 pcs, to be local procure).
Matching to the existing structure, set pitch according to size in the unit external view as shown below.

New concrete slab

Install the bolts with insert brackets or anchor
bolts.

Reinforcing
steel

(Blade type

bracket)

(Slide type

bracket)

Anchor bolt

(Pipe hanging

anchor bolt)

Use existing angles or install new
support angles.

Steel flame structure

Hanging bolt

Hanging bolt Support angle

Existing concrete slab

Use a hole-in anchors, hole­in plugs, or a hole-in bolts.

Installing Flow Selector unit

• Attach the nuts (M10 or W3/8: local supply) and flat washers (M10: local supply) to the hanging bolts.

• Put the washers over and under the T-groove of the hanging brackets of the Flow Selector unit to hang down

the unit.

• Using a level vial, check that the four sides are horizontal.
(Horizontal degree: Within 5 mm).

Level vial (Horizontal degree: Within 5 mm)

Hanging
bolt

10 to 15mm

Hanging bolt
(M10 or W3/8)

Nut
(M10 or W3/8)

Nut
(M10 or W3/8)

Procure the hanging
bolts, washers, and
nuts locally.

M10 Flat washer

M10 Flat washer
To prevent the bolt
from coming off, attach
the washer just under
the hanging bracket as
shown in the figure.

REQUIREMENT

Install the Flow Selector unit with the
correct direction as shown in the figure.

If installed with incorrect direction, the Flow

Flow Selector unit

Selector unit will not operate properly.

79

7-4. Refrigerant Piping

WARNING

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.

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 fan heater, cooking
stove or heating unit, noxious gas may be
generated.

Permissible pipe length and permissible height difference

The length of a connection pipe to the indoor unit should be 5 m or less.
For details, refer to the installation manual attached to the outdoor unit.

REQUIREMENT

When the refrigerant pipe is long, set the support brackets to fix the pipe at intervals of 2.5 to 3 m. If the pipe
is not fixed, noise may be generated.

Be sure to use the flare nuts attached to the Flow Selector unit or ones for R410A.

Piping material and dimensions

Material Seamless phosphorus deoxidized copper pipe for air-conditioning

FS unit RBM-Y1121FE RBM-Y1801FE

Indoor unit MM∗-AP

Indoor unit side pipe size (mm)

Outdoor unit side pipe size (mm)

∗

Gas pipe

Liquid pipe

Suction gas pipe

Discharge gas pipe

Liquid pipe

007-012 015-018 024-030 036-056

*Ø9.5 *Ø12.7 Ø15.9 Ø15.9
*Ø6.4 *Ø6.4 Ø9.5 Ø9.5

*Ø12.7 *Ø12.7 Ø15.9 Ø15.9

*Ø9.5 *Ø9.5 Ø12.7 Ø12.7
*Ø6.4 *Ø6.4 Ø9.5 Ø9.5

∗ Use pipes attached with the FS unit. The pipes are not flared. Flare them when using them.

<RBM-Y1121FE (When attached pipes are used)>

Attached pipe

Brazing

Pipe procured locally

Discharge gas pipe

Liquid pipe

Suction gas pipe

Pipe procured locally

Discharge gas pipe

Liquid pipe

Suction gas pipe

Flare

<RBM-Y1121FE, RBM-Y1801FE>

Flare

Flare

Attached pipe

Brazing

Pipe procured locally

Gas pipe
Liquid pipe

Flare

Pipe procured locally

Gas pipe

Liquid pipe

80

8. OUTDOOR UNIT INSTALLATION

8-1. Selecting a Location for Installation

CAUTION

Check that it is installed at a place where flammable gas does not leak.

If gas leaks and accumulates on surroundings of the unit, combustion may be caused.

Check that the outdoor unit is fixed to the base.

Otherwise, an accident such as falling may be caused.

REQUIREMENT

• Avoid a location where a machine is generating high frequency.

• Using the air conditioner at a specific location where spray of oil (including machine oil) or steam is

possible, salty location such as seaside, or place where gas sulfide generates such as hot spring may
cause a trouble.

If doing so, a special maintenance is required. For details, contact the dealer which you purchased it.

• Avoid obstruction of inlet port and outlet port of the outdoor unit so there is no restriction of air flow.

• Avoid to installing the air conditioner in a location where strong wind blows against the inlet or outlet port of

the outdoor unit.

• When using the air conditioner at the snow area, mount a snowfall frame or hood to the outdoor unit.

For details, contact the dealer which you purchased the air conditioner.

• Drain water from the outdoor unit to a place having good drainage.

• Set TV or radio 1m or more apart from the main unit of air conditioner or remote controller.

Quality of picture or noise may be affected.

Attention to operation sound

• Select a location with sufficient strength, where operation sound or vibration does not transmit to other entities,
or does not increase.

• If an obstacle is put on the near outlet port of the outdoor unit, operation sound may increase.

• Select a position where neighbors are not affected by discharge air from the discharge port of the outdoor unit
or the operation sound.

Electric wiring

WARNING

Check that earthing practice is correctly performed.

Grounding is necessary. If earthing practice is incomplete, an electric shock may be caused.

CAUTION

Check the electrical leakage breaker is fitted.

It is necessary to fit an electrical leakage breaker. Otherwise, an electric shock may be caused.

Only use fuses with the correct capacity.

Using wire or copper wire may cause a fire or trouble.
For the power source, use a circuit with rated voltage exclusive for air conditioner.

81

Installation space

1. Align the servicing surfaces of the outdoor units and connect them for installation.

2. Considering functions, reserve space necessary for construction and servicing.

(The figure at lower right side shows a case that 3 units are installed connectively.

Outdoor unit top view

20mm or more

(A case of 3 units are installed.)

20mm or more

10mm
or more

Air inlet

Air inlet

Installation work/
servicing surface

Square hole for handling

Air outlet

(Rear side)

500mm or more

Air inlet

10mm
or more

Air inlet

500mm or more

(Front side)

NOTES :

(1) If there is an obstacle at upper side of the outdoor unit, reserve space of 2000mm or more up to the top end

of the outdoor unit.

(2) Install the outdoor unit so that height of obstacle surrounding the outdoor unit is kept 800mm or less from the

bottom end of the outdoor unit.

(3) If height of obstacle surrounding the outdoor unit is higher than the outdoor unit, measures such as discharge

duct being installed is required.

[1] Outdoor unit carrying in

Handle the outdoor unit in care with the following items.

1. When using a forklift, etc f or loading/unloading in transportation, insert pawl of the forklift into the square hole

for handling as shown below.

2. When lifting up the unit, insert a rope sufficiently bearable to unit mass into the square hole for handling, and

cord the unit from four sides. (Apply a plaster to position where rope fits outdoor unit itself so that flaw or
deformation does not generate on the outer surface of the outdoor unit.)
(There provided the reinforcing plates on the side surfaces, so the rope cannot be passed.)

Plaster

Forklift Forklift

Square hole for handling

Rope
Plaster

Reinforcing plate

82

[2] Installation of outdoor unit

WARNING

• Perform a specified installation work against a strong wind such as typhoon or earthquake.

If the air conditioner is imperfectly installed, an accident by falling or dropping may be caused.

1. Arrange the outdoor units with 20mm or more

intervals. Fix the outdoor unit with M12 anchor
bolts (4 positions/unit). 20mm is appropriate to
length of anchor bolt.

20

• Anchor bolt pitch is as shown below.

700*310 or more

Continuous hole (15 x 20 long hole)

*

310 or more700 700

2. When taking the refrigerant pipe from underside,

set height of the stool by 500mm or more.

20mm or more 20mm or more

M12 anchor bolt
4 positions/unit

However, piping equivalent length should

755

*

not exceed 25m between the outdoor unit
nearest to the indoor unit and the farthest
outdoor unit from the indoor unit on piping
path in one refrigerating cycle system.

3 . Do not use four stools to set the four corners.

500mm or more

4 . Mount the vibration-proof rubber (vibration-proof block etc.) so that it catch whole the clamping leg.

Install the vibration-proof rubber so that

Anchor bolt

Vibration-proof rubber

Bent part of the fixing
leg is not grounded.

bent part of the fixing leg is grounded.

83

8-2. Standards for Rooftop Collective Installation

When outer wall is taller than outdoor units

1) When a vent is installed

more

500 or

H

more

600 or

10mm

or more

The aperture ratio should permit an intake velocity Vs through the vent of 1.5m/s.

Q

The height of the air outlet duct is HD = H–h.

R

20 or
more

(front)

20 or
more

20 or
more

20 or

more

HD

h

2) When a vent cannot be installed

Vs

Air outlet duct

1000 or more

Vent

more

500 or

more

600 or

10mm

or more

Install a base so that the height of wall is the same as that of air outlet duct.

Q

20 or
more

(front)

20 or
more

20 or
more

20 or
more

HD

H

h’

500 to 1000

(Height for a base is 500 to 1000mm.)

The height of the air outlet duct is HD = H–h’.

R

84

Air outlet duct

Vs

Base

1) One-row installation

more

500 or

more

500 or

2) Two-row installation

500

or more

600

(1000

or more

*

or more)

500

or more

When outer wall is shorter than outdoor units

800 or less

(Front side)

10mm

20 or

20 or

20 or

or more

more

(Front side)
(Front side)

more

more

20 or
more

800 or less

3) Three-row installation

500

or more

600

(1000

or more

*

or more)

600

or more

500

or more

10mm

or more

10mm

or more

20 or

more

20 or

more

20 or

more

(Front side)

(Front side)

(Front side)

(Front side)

20 or

more

20 or
more

20 or

more

20 or

more

20 or

more

800 or less

These examples assume that the refrigerant lines

*

are routed out the front of the units. (When pipes
on the site are run from the outdoor units to the
front horizontally, there should be at least 500mm
of space between the outdoor units and the
horizontal pipes.)

85

Piping

500
or more

Piping

500
or more

Floor by floor installation

D

V

V

S

800 or less

(Front)

200

or more

or more

20

or more

200

or more

500 or more20

600 or more

1) Install the air outlet duct for every outdoor unit.

(When a vent is installed, the air outlet duct should be stuck to the vent.)

2) Flap angle of the vent is 20-degree facing down from the horizontal level.

3) Intake velocity VS through the vent is 1.5m/s. or less.

Air discharge velocity VD trough the vent is 4 - 5m/s. or less.

[NOTE]

This installation is applied to the case less than 10th floor to avoid the influence of locally strong wind blowing
along a street of very tall buildings.

86

9. ELECTRIC WIRING

WARNING

Using the exclusive circuit, a person qualified for electrician shall work for the electric
work in conformance with the regulations of the local electric company and the Installation
Manual.

If there is capacity shortage of the power circuit or incomplete electric work, a fire or electric shock is caused.

For cabling, use the specified cables and connect them securely so that external force of
cable does not transmit to the terminal connecting section.

If connection or fixing is incomplete, a fire is caused.

Be sure to connect the earth wire.

Grounding work is necessary based upon a law. If the earth grounding is incomplete, an electric shock is
caused.

Do not connect earth wire to gas pipe, lightning rod, or earth wire of telephone.

CAUTION

Be sure to attach an earth leakage breaker; otherwise an electric shock may be caused.

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.

REQUIREMENT

• Perform wiring of the power supply in conformance with the regulations of the local electric company.

• For wiring of power supply in the indoor unit, refer to the Installation Manual of each indoor unit.

• Never connect the 220–240V power to the terminal block (U1, U2, U3, U4, U5, U6) for control cables.

(Trouble is caused.)

• Arrange the cables so that the electric wires do not come to contact with high-temperature part of the pipe;

otherwise coating melts and an accident may be caused.

• After connecting cable to the terminal block, take off the trap and then fix the cable with cable clamp.

• Store wiring system for control and refrigerant piping system in the same line.

• Do not turn on power of the indoor unit until vacuuming of the refrigerant pipe will finish.

• For cabling of the power supply of the indoor unit and the inter-unit cabling betw een indoor and outdoor units,
refer to the Installation Manual of indoor unit.

87

9-1. Power Supply Specifications

• Power supply specifications of outdoor unit

Select the power supply cabling and fuse of outdoor unit from the following specifications:
Cable 5-core, in conformance with Design 60245 IEC 66

9-2. Electrical Wiring Design

3-phase
50Hz 380-415V
Earth leakage breaker

hand switch

Outdoor
power source

Indoor
power source

Single phase
50Hz 220-240V
Earth leakage breaker

power switch

• Unit capacities and power supply wire sizes (Reference)

Earth

FS unit

Indoor unit

FS unit

Indoor unit

Pull box

FS unit

Indoor unit

FS unit

Indoor unit

FS unit

Indoor unit

FS unit

Indoor unit

FS unit

Indoor unit

FS unit

Indoor unit

Model
MMY-

MAP0801FT8 3.5 mm² (AWG #10) Max. 20 m 30 A
MAP1001FT8 5.5 mm² (AWG #10) Max. 28 m 30 A
MAP1201FT8 5.5 mm² (AWG #10) Max. 27 m 30 A

• Determine the wire size for indoor unit according to the number of connected indoor units downstream.

• Observe local regulation regarding wire size selection and installation.

Wire size Field fuse

Power supply wiring

88

9-3. Design of Control Wiring

Power supply
Single phase
220-240V 50Hz

[Central remote controller] (Option)
TCB-SC642TLE (For Line 64)

(Open)

Earth

FS unit

Transmission wire for control
between outdoor unit and
indoor unit

FS unitFS unit

FS unit FS unit

Connection of shield wire must be connected
(Connected to all connecting sections in each indoor unit)

FS unit

• Wire specification, quantity, size of crosso ver wiring and remote controller wiring

Name Q’ty

Up to 500m Up to 1000m 1000 to 2000m

Size

Transmission wire for
control between indoor
and FS unit.

FS unit

Transmission wire for
control between indor
and FS unit.

FS unit

Specification

Crossover wiring
(indoor-indoor / indoor-outdoor /
control wiring, central control wiring)

Remote controller wiring 2 cores 0.5 to 2.0mm²— — —
Control wiring between indoor and

FS unit

2 cores 1.25mm² 2.0mm² Shield wire

Be sure to use the attached connection cable (6m). If the length between indoor and FS unit e xceeds
5 m, connect by using the connection cable kit (RBC-CBK15FE). (S ol d separately)

(1) The crossover wiring and central control wiring use 2-core non-polarity transmission wires. Use 2-core

shield wires to prevent noise trouble. In this case, close (connect) the end of shield wires, and perform the
functional grounding for the end of the shield wires which are connected to both indoor and outdoor units.
For the shield wires which are connected between the central remote controller and the outdoor unit,
perform the functional grounding at only one end of central control wiring.

(2) Use 2-core and non-polarity wire for remote controller . (A, B terminals)

Use 2-core and non-polarity wire for wiring of group control. (A, B terminals)

89

NOTE

4 or more control wires connected to one terminal is prohibited.

Outdoor unit

U3U4

U1U2 U5U6

NG

Indoor unit

1 2

A B

1 2

A B

1 2

A B

1 2

A B

Remote controller

1 2

A B

1 2

A B

1 2
A B

1 2
A B

1 2
A B

Loop wiring of control wires is prohibited.

Outdoor unit

U3U4

U1U2 U5U6

1 2

A B

1 2

A B

Indoor unit

Remote controller

NOTE

1 2
A B

1 2
A B

1 2
A B

1 2
A B

NG

Wiring which the
transmission line is
formed in loop is
unavailable, Dotted
line is forbidden

1 2

A B

1 2
A B

1 2
A B

90

• Specifications of cables for controlling

1 . Connect each cable for controlling as shown below.

Outdoor unit

U4U3U2U1 U5 U6

U3 and U4 terminals are used when a central
control which connects each line is adopted.

Shield wire

earth

Control wiring between
indoor and outdoor units

n Outdoor unit

Model name

MMY-

MAP0801FT8 400-3-50 342 457 5.2 + 5.2 — 0.60 1.0 20.0 30 —
MAP1001FT8 400-3-50 342 457 6.5 + 6.5 — 0.60 1.1 22.5 30 —
MAP1201FT8 400-3-50 342 457 9.5 + 9.5

Nominal voltage

(V-Ph-Hz)

Legend MCA : Minimum Circuit Amps

MOCP : Maximum Overcurrent Protection (Amps)
ICF : Maximum Instantaneous Current Flow Start
RLA : Rated Load Amps
LRA : Locked Rotor Amps
FLA : Full Load Amps
kW : Fan Motor Rated Output (kW)

Voltage range Compressor Fan Motor Power Supply

Min. Max. RLA LRA kW FLA MCA MOCP ICF

—

0.60 1.1 24.5 30

—

NOTE :

RLA is based on the following conditions .
Indoor temperature : 27°C DB/19°C WB
Outdoor temperature : 35°C DB

91

9-5. For Indoor Unit Power Supply

(The outdoor unit has a separate power supply.)

Item

Model

All models of indoor units 2.0mm² (AWG#14) Max. 20m 3.5mm² (AWG#12) Max. 50m 15A

FS unit

Be sure to use the attached cable (6m) . If t he leng th between indoor and FS unit ex ceeds 5m ,
connect by using the connection cable kit (RBC-CBK15FE). (Sold separately)

Power supply wiring

Wire size Field fuse

NOTE :

The connecting length indicated in the table represents the length from the pull box to the outdoor unit when the
indoor units are connected in parallel for power, as shown in the illustration below. A v oltage drop of no more
than 2% is also assumed. If the connecting length will exceed the length indicated in the table, select the wire
thickness in accordance with indoor wiring standards.

• Group Control through a Remote Controller

Group control of multiple indoor units (8 units) through a single remote controller switch

Indoor unit No.1

AB AB AB AB AB AB

Remote
controller

(A.B)

No.8No.7No.4No.3No.2

Indoor power source
single phase 220–240V, 50Hz

Earth leakage breaker

Switch

FS unit FS unit FS unit FS unit

FS unit FS unit FS unit FS unit

Pull box

CAUTION

(1) Keep the refrigerant piping system and the indoor-indoor/indoor-outdoor control wiring systems together.
(2) When running power wires and control wires parallel to each other, either run them through separate

conduits, or maintain a suitable distance between them.
(Current capacity of power wires: 10A or less for 300mm, 50A or less for 500mm)

92

9-6. System Wiring Diagram

Power supply
3 phase 380-415V 50Hz

Earth leakage breaker
Power swith

Outdoor unit

Earth

terminal

Power supply
Single phase
220-240V
50Hz

Outdoor side

Indoor side

Earth leakage

breaker

Power switch

Earth

terminal

U2 U3 U4 U5 U6

U1

Indoor unit

Earth

terminal

A
B

U1/U2

Earth terminal

LN

Pull
Box

Control

wiring

Power

line

Earth

terminal

Remote
controller

FS unit

CN02
CN01

Earth

terminal

Central remote

controller

U1/U3
U2/U4

U1/U2

Earth terminal

LN

Earth

terminal

Pull
Box

Single phase
220-240V 50Hz

Indoor unit

A
B

Control

CN81

wiring

Power

line

Remote
controller

FS unit

CN02
CN01

Earth

terminal

U1/U2

Earth terminal

LN

terminal

Earth

Indoor unit

A
B

Control

wiring

Power

line

Remote
controller

FS unit

CN02
CN01

Earth

terminal

NOTE :

Control wire and power line wire between FS unit and indoor unit are the accessary parts of FS unit.
(Wire length : 6m)

If the length between indoor and FS unit exceeds 5m, connect b y using the connection cable kit sold separately
(RBC-CBK15FE).

93

9-7. Connection of Power Supply Cable with Control Wire

Insert power supply cable and control wire after removing knockout of the piping/wiring panel at front side of the
outdoor unit.

Knockout for power supply cable
Knockout for control wire
Piping/wiring panel

When insert power supply cable
and control wire, protect power supply cable
and control wire from edge after removing knockout.

n Power supply cable

1. Connect the power supply cab les and earthing wire to the terminal block of the power supply through a

notched section at side of the electric parts box, and fix with a clamp.

2. Bundle the power supply cables using the hole so that they are not out of the notched section of the electric

parts box.

n Control wire

1. Connect the control wire between indoor and outdoor units and the control wire between outdoor units to

(U1 to U4) terminal section through a hole at side of the electric parts box, and fix with a clamp.

2. Use the control wire with 2-core shield wire (1.25mm² or more) in order to prevent noise trouble. (Non-

polarity)

NOTE :

1) Be sure to separate the power supply cables and each control cable.

2) Arrange the power supply cables and each control cable so that the y do not contact with the bottom surface

of the outdoor unit.

3) A terminal block (U3, U4 terminal blocks) for connecting an optional part “Central remote controller etc.” is

provided on the inverter unit, so be careful to miswiring.

U

1-U6

Terminal

Power supply

terminal block

L1 L2 L3 N

Earth screw

U1 U2 U3 U4 U5 U6

U1-U2
U3-U4

( )

U5-U6

: For wiring for control wire between indoor/outdoor unit
: For Central remote controller etc.
: Not use this model.

L1 L2 L3 N

10mm
or more

Earth

screw

P.C. board

94

Earth line

Power supply cable

9-8. Electrical Wiring of Flow Selector Unit

Wire connections Use the supplied, dedicated wires.

REQUIREMENT

• Check that power is not supplied to the indoor unit before connecting wires.

• For safety, connect wires to the Flow Selector unit first.

• Be sure to put wires through the wire connecting ports on the Flow Selector unit and the indoor unit.

Connection diagram

• Power is supplied from the connected indoor unit.

• Connect the attached wires (power supply / control wiring) between the Flow Selector unit and the indoor unit.

Connect wires as shown in the below figure.

RBM-Y1801FE Only

SVSSVS SVSS

SVDCOM SVS

BLU

ORN

WHI

Flow Selector Unit

SVD

SVDD

SVDD

YEL

SVSS

BRW

1
1

CN01
(RED)

Control P.C. Bord MCC-1431

Earth Screw

113

3

3

CN10
(WHI)

CN02
(GRN)

312
321

45

Attached wire (power supply)

9977553

54

Attached wire (control wiring)

Indoor Unit

Control P.C. Bord
for indoor unit

51234

CN81

45213

(BLK)

11
33

CN67
(BLK)

Power Supply
Single Phase
220-240V 50Hz

S(N)R(L)

Indoor Unit
Earth Screw

Attached connection wire between indoor and FS unit can be used up to 5m in pipe length between indoor and
FS unit. When the pipe length between indoor and FS unit exceeds 5m, be sure to use the connection cable kit
sold separately (RBC-CBK15FE).

Flow Selector unit

• Remove the fixing screws (4 parts) from the cover of the Flow Selector unit.

• Connect the connector (red) of the attached wire (power supply) to CN01 on the FS unit control P.C. board.

• Connect the ring terminal of the attached wire (power supply) to the earth screw.

• Connect the connector (green) of the attached wire (control wiring) to CN02 on the FS unit control P.C. board.

• Secure the two attached wires with the attached cord clamp.
(Be careful not to apply tension to the wires and connectors.)

• Check that the wires are not pinched, and then attach the cover.

Fixing screw (4 parts)

Earth screw

CN01 (Red)

Control P.C. board

95

Cord clamp (Control wiring)

Cord clamp

Attached wire
(Power supply)

Attached wire
(Power supply)

CN02 (Green)

Indoor unit

See also the Installation Manual supplied with the indoor unit.

• Remove the electrical parts box cover from the indoor unit.

• Connect the receptacle R(L) and S(N) on the attached wire (power supply) to a free on the R(L) and S(N)
terminal block for power supply.

∗ When the indoor unit is the high wall or concealed duct high static pressure type, connect as follows.
Connect the wire to the lead wires with wire joint on the R(L) and S(N) terminal block for power supply, using

the following procedure:
Cut the wire joint on each lead wire, and cut the receptacle R(L) and S(N) on the attached wire (power

supply). Then check the R(L) and S(N) phases, and connect the wire and the lead wires with the attached
wire joints.

• Connect the ring terminal of the attached wire (power supply) to the earth screw.

• Connect the connector (black) of the attached wire (control wiring) to CN081 on the Indoor P.C. board.

• Secure the two attached wires with the attached cord clamp.
(Be careful not to apply tension to the wires and connectors.)

• Check that the wires are not pinched, and then attach the cover.

n Connections

4-way Air Discharge Cassette Type (MMU-AP

Indoor P.C. board

R(L), S(N) terminal
block for power supply

Earth screw

Receptacle connection

R(L) S(N)

U1 U2 A B

✽✽✽✽

✽✽1H Series)

✽✽✽✽

CN81

Clamp with remote
controller lead wires

Power supply

Attached wire (Control wiring)

Attached wire (Power supply)

96

2-way Air Discharge Cassette Type (MMU-AP✽✽1WH Series)

Attached wire

Power supply

R(L) S(N)

Earth screw

(Power supply)

Attached wire
(Control wiring)

Indoor P.C. board

R(L), S(N)
terminal
block for
power supply

FOR INTER-UNIT FOR AI-NET

FOR REMOTE CONTROL

DONT APPLY 220-240V

Receptacle connection

Earth screw

CN081(Black)

1-way Air Discharge Cassette Type (MMU-AP✽✽1YH, SH Series)
Floor Standing Concealed Type (MML-AP✽✽1BH Series)
Floor Standing Type (MMF-AP✽✽1H Series)

Indoor P.C. board

Receptacle connection

Earth screw

Cord clamp

CN081

Cord clamp

Power supply

R(L) S(N)

R(L), S(N) terminal block for
power supply

97

DON T APPLY 220-240V

FOR INTER-UNIT

FOR REMOTE CONTROL

Attached wire
(Power supply)

Attached wire
(Control wiring)

Cord clamp

1-way Air Discharge Cassette Type (MMU-AP✽✽1YH Series)

Indoor
P.C. board

CN081

Attached wire
(Control wiring)

Earth screw

Attached wire
(Power supply)

Concealed Duct Standard Type (MMD-AP✽✽1BH Series)

R(L), S(L)
terminal block
for power supply

Corde clamp

Power supply

Indoor P.C. board

R(L), S(L)
terminal block
for power supply

CN081

Earth screw

Receptacle connection

Cord clamp

98

Attached wire
(Control wiring)

Attached wire
(Power supply)

Power supply

Concealed Duct High Static Pressure Type (MMD-AP✽✽1H Series)

Wire joint (Attached)Indoor P.C. board

CN081
(Black)

Secure here.

Attached wire
(Control wiring)

Earth screw

Attached wire
(Power supply)

Under Ceiling Type (MMC-AP✽✽1H Series)

R(L), S(N) terminal

Indoor P.C. board

Receptacle connection

block for power supply

Power supply

R(L), S(N) terminal block
for power supply

Connect to the lead wires
(red and white) on R(L) and S(N).

Attached wire
(Control wiring)

Cord clamp

CN081 (Black)

Earth screw

99

R(L) S(N)

Cord clamp

DON’T APPLY 220-240V

FOR INTER-UNIT

FOR REMOTE CONTROL

Attached wire
(Power supply)

Power supply

High Wall Type (MMK-AP✽✽1H Series)

CN81 (Black)

Indoor P.C. board

Wire joint (Attached)

Earth screw

R(L) , S(N) terminal
block for power supply

Power supply

Connect to the lead wires
(red and white) on R(L) and S(N).

Cord clamp

Attached wire
(Control wiring)

Attached wire
(Power supply)

100