Toshiba RBM-Y1123FE User manual

Installation Manual
Flow Selector unit
RBM-Y1123FE
RBM-Y1803FE
RBM-Y2803FE
English
EH99893801-2

1
Accessory parts and Parts to be procured locally


Accessory parts
Thank you very much for purchasing TOSHIBA Super Heat Recovery Multi (S-HRM) Air conditioner.
Please read this manual carefully before using your Flow Selector unit.
• When installing an indoor or outdoor unit, follow the installation manual supplied with the unit.
• 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.
ADOPTION OF NEW REFRIGERANT
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.
English-1 English-2
Part name
Installation Manual
Attached wire
(For power supply)
Attached wire
(For control wiring)
Heat insulating pipe
Heat insulating pipe
Heat insulating pipe
Attached pipe
Attached pipe
Attached pipe
Wire joint
Q’ty RBM-
Y1123FE Y1803FE Y2803FE
111
111
111
332
—— 1
222
1——
1——
1——
222
Shape
—
Usage
(Be sure to hand over to customers.)
(For other languages that do not appear in this
Installation Manual, please refer to the enclosed CD-R.)
CD-ROM 1 1 1 — Installation Manual
For power supply from indoor unit (3-core, 6m)
For communication with indoor unit (5-core, 6m)
For heat insulating of suction gas, discharge gas,
and gas pipe connecting sections
For heat insulating of discharge gas
For heat insulating of liquid pipe connecting section
Ø9.5 - Ø6.4, connection pipe
Ø15.9 - Ø12.7, connection pipe
Ø15.9 - Ø9.5, connection pipe
For connection with certain indoor units
CONTENTS
Accessory parts and Parts to be procured locally ...........................................1
1PRECAUTIONS FOR SAFETY ......................................................................1
2INSTALLATION OF NEW REFRIGERANT AIR CONDITIONER ..................2
3SELECTION OF INSTALLATION PLACE .....................................................3
4INSTALLATION OF FLOW SELECTOR UNIT ...............................................4
5REFRIGERANT PIPING ................................................................................ 5
6ELECTRIC WORK ......................................................................................... 6
1PRECAUTIONS FOR SAFETY
• Ensure that all Local, National and International regulations are satisfied.
• Read this “PRECAUTIONS FOR SAFETY” 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.
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 refrigerat-
ing 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 pressure-resistance force
and impurity in it.

2
English-4English-3
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 is 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.
2INSTALLATION OF NEW REFRIGERANT
AIR CONDITIONER
This air conditioner adopts the new HFC refrigerant (R410A) which does not deplete the ozone layer.
• R410A refrigerant is apt to be affected by impurity such as water, oxidizing membrane, or oils because the
pressure of R410A refrigerant is higher than that of the former refrigerant by approx. 1.6 times.
Accompanied with adoption of the new refrigerant, refrigerating oil has been also changed.
Therefore pay attention so that water, dust, former refrigerant, or refrigerating oil does not enter into the refriger-
ating cycle of the new refrigerant air conditioner during installation work.
• To prevent from mixing of refrigerant or refrigerating oil, the size of charge port of the main unit or connecting
section of installation tool differs from that of the air conditioner for the former refrigerant.
Accordingly the exclusive tools are required for the new refrigerant (R410A) as shown below.
• For connecting pipes, use the new and clean piping materials so that water or dust does not enter.


Required tools and cautions on handling
It is necessary to prepare the tools and parts as described below for the installation work.
The tools and parts which will be newly prepared in the following items should be restricted to the exclusive use.
Explanation of symbols
z: Newly prepared (It is necessary to use it properly exclusive to R410A separated from those for R22 or R407C.)
{: Former tool is available.


Refrigerant piping
• Piping material used for the conventional refrigerant cannot be used.
• Use copper pipe with 0.8mm or more thickness for Ø6.4, Ø9.5, Ø12.7mm.
Use copper pipe with 1.0mm or more thickness for Ø15.9mm, Ø19.1mm, Ø22.2mm or more.
• Use clean and new pipes for the refrigerant pipes and perform piping work so that water or dust does not
contaminate the refrigerant.
Used tools
Gauge manifold
Charging hose
Gas leak detector
Vacuum pump
Vacuum pump with counter-flow
preventive adapter
Bender
Refrigerant recovery device
Pipe cutter
Refrigerant cylinder
Welding machine/
Nitrogen gas cylinder
Refrigerant charging balance
Usage
Vacuuming or charging of
refrigerant and operation check
Checks gas leak
Vacuum drying
Vacuum drying
Bending processing of pipes
Recovers refrigerant
Cuts pipes
Charges refrigerant
Welding of pipes
Charges refrigerant
Proper use of tools/parts
zNewly prepared, Exclusive to R410A
zNewly prepared, Exclusive to R410A
zNewly prepared
Usable if a counter-flow preventive adapter is attached
{: R22 (Existing article)
{: R22 (Existing article)
zExclusive to R410A
{: R22 (Existing article)
zExclusive to R410A
ID : Refrigerant name entered
{: R22 (Existing article)
{: R22 (Existing article)

3
English-5 English-6
3SELECTION OF INSTALLATION PLACE
CAUTION
Do not install the air conditioner at place where combustible gas may leak.
If gas leaks and is collected at surrounding the unit, the production of fire may be caused.
Cautions for Installation at a Place with the Quiet Background Sound
Upon customer’s approval, install the air conditioner at a place where satisfies the following conditions.
• Place where it can be installed horizontally.
• Place which can reserve a service space for safe maintenance or check.
• Place where there is no problem even if the drained water flows.
Apply electric insulation between metal section of the building and metal section of the air
conditioner in conformance with the Local Regulation.
Avoid the following places.
• Salty place (seaside area) or place with much gas sulfide (hot spring area)
(If selecting such a place, a special maintenance is required.)
• Place where oil (including machine oil), steam, oil smoke or corrosive gas generates.
• Place where a device generating high frequency (inverter, non-utility generator, medical apparatus, or communi-
cation equipment) is set. (A bad influence may generate by malfunction of the air conditioner, control error, or
noise for such equipment.)
As the Flow Selector unit incorporates the solenoid valve, the refrigerant sound or the operating sound of the
solenoid valve such as “Bushuu...” generates when exchanging between cooling and heating mode and during
defrost operation. Therefore, avoid installing the unit at a place with quiet background sound as follows.
(1) Rooms with quiet background sound such as bedroom, hospital, or room in a hotel.
(2) Rooms which have no ceiling and a fabric does not block the residence space from the Flow Selector
unit.
(3) Rooms which have opening port at the ceiling.
When installing the unit at the above places, separate the unit from the indoor unit (within 15 m) and install the
unit at a place so that sound does not transmit into the room such as in the corridor ceiling.
250 or more
100 or more
50 or more
250 or more
<RBM-Y1123FE, RBM-Y1803FE>
100
or
more
500 or more
Outdoor unit side Indoor unit side
Refrigerant pipe
connecting port
(Discharge gas)
Refrigerant pipe
connecting port
(Liquid)
Refrigerant pipe
connecting port
(Suction gas)
Refrigerant pipe
connecting port
(Gas)
Refrigerant pipe
connecting port
(Liquid)
Hanging bracket
Electrical parts
box cover
Check port,
450 × 450 or more
400 or more
100 or more
100 or more
400 or more
<RBM-Y2803FE >
100
or
more
700 or more
Electrical parts
box cover
Check port,
600 × 600
or more
250 or more
(175)
(180)
350 or more
(Unit:mm)
<RBM-Y1123FE (When attached pipes are used)>
100 or more
50 or more


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.
• Keep a clearance of 50mm or more between the top panel of the unit and the ceiling.
• The length of a connection pipe to the indoor unit should be 15m or less.
<Installation space>
RBM-Y1123FE, RBM-Y1803FE
RBM-Y2803FE

4
Refrigerant pipe connecting port
(Liquid)
Refrigerant pipe connecting port
(Liquid)
Refrigerant pipe connecting port
(Suction gas)
Refrigerant pipe connecting port
(Discharge gas)
Outdoor unit side Indoor unit side
Refrigerant pipe connecting port
(Gas)
Hanging bracket
320 (Hanging bolt pitch)
160
250
54
75
(120)(120)
21
44
87
200
28
56
94
(120) (120) 67
94
Earth screw
These coils are
on Y1803FE only.
79
109
77
200
6849
159
31
190
157
39 57
Refrigerant pipe connecting port
(Gas)
Refrigerant pipe connecting port
(Liquid)
Refrigerant pipe connecting port
(Suction gas)
Refrigerant pipe connecting port
(Discharge gas)
Outdoor unit side Indoor unit side
Refrigerant pipe connecting port
(Liquid)
Hanging bracket
470 (Hanging bolt pitch)
400
Earth screw
(Unit:mm)
English-8English-7
4INSTALLATION OF FLOW SELECTOR UNIT
WARNING
Install the unit securely in the place to sufficiently withstand the weight of the unit.
If the foundation is not sturdy enough, the unit may fall and cause personal injury.
Perform a specified installation work to guard against earth quake.
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.
• 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
RBM-Y1123FE, RBM-Y1803FE
RBM-Y2803FE


Installing hanging bolts
• Considering piping and wiring after hanging the Flow Selector
unit, determine the installation position and direction.
• After determining he installation position of the Flow Selector
unit, install the hanging bolts.
• For hanging bolt pitch, see the External view.
• When the ceiling is installed, draw the pipes to the position
where they are to be connected before hanging the unit.
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 bolts
Use M10 (mm) or W3/8 hanging bolts (2 pcs., to be local procure).
Matching to the existing structure, set pitch according to size in the unit external view as shown below.
Procure hanging bolts and nuts locally for
installing the unit.
Anchor bolt
(Blade type
bracket)
(Slide type
bracket)
(Pipe hanging
anchor bolt)
Reinforcing
steel
Hanging bolt
Hanging bolt Support angle
Hanging bolt
Nut
Flat washer
M10 (mm) or W3/8
M10 (mm) or W3/8
M10 (mm)
2 pieces
6 pieces
4 pieces
New concrete slab
Install the bolts with insert brackets or anchor bolts.
Steel frame structure
Use existing angles or install new support
angles.
Existing concrete slab
Use a hole-in anchors, hole-in plugs,
or a hole-in bolts.


Installing Flow Selector unit
• Attach the nuts (M10 (mm) or W3/8: to be local procure) and flat washers (M10: to be local procure) 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 5mm).
REQUIREMENT
Install the Flow Selector unit with the correct direction as shown in the figure.
If installed with incorrect direction, the Flow Selector unit will not operate properly.
Hanging
bolt
Level vial
(Horizontal degree: Within 5 mm)
10 to 15mm
Flow Selector unit
M10 (mm) Flat washer
M10 (mm) Flat washer
To prevent the bolt from
coming off, attach the
washer just under
the hanging bracket as
shown in the figure.
Procure the hanging
bolts, washers, and
nuts locally.
Nut
(M10 (mm) or W3/8)
Nut
(M10 (mm) or W3/8)
Hanging bolt
(M10 (mm) or W3/8)

5
English-10English-9
5REFRIGERANT 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 15m 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 3m.
If the pipe is not fixed, noise may be generated.


Piping material and dimensions
One indoor unit connection
Outdoor unit Flow selector unit
Indoor unit
* Use pipes attached with the Flow Selector unit.
Multi indoor unit connection
For selection of the branching pipe, refer to the
Installation Manual attached to the outdoor unit.
Outdoor unit Flow selector unit
Indoor unit
Material
Flow Selector unit
Indoor unit
Indoor unit side pipe size
(mm)
Outdoor unit side pipe size
(mm)
Seamless phosphorus deoxidized copper pipe for air conditioning
RBM- Y1123FE Y1803FE Y2803FE
MM∗-AP∗∗∗ 007 to 012 015 to 018 024 to 030 036 to 056 072 to 096
Gas pipe Ø9.5* Ø12.7* Ø15.9 Ø15.9 Ø22.2
Liquid pipe Ø6.4* Ø6.4* Ø9.5 Ø9.5 Ø12.7*
Suction gas pipe Ø15.9*Ø15.9*Ø15.9 Ø15.9 Ø22.2
Discharge gas pipe Ø12.7*Ø12.7*Ø12.7 Ø12.7 Ø19.1
Liquid pipe Ø9.5*Ø9.5*Ø9.5 Ø9.5 Ø12.7*
Material
Flow Selector unit
Indoor unit capacity code
Indoor unit side pipe size
(mm)
Outdoor unit side pipe size
(mm)
Connectable indoor units
Seamless phosphorus deoxidized copper pipe for air conditioning
RBM- Y1123FE Y1803FE Y2803FE
Less than 11.2 11.2 or more 18.0 or more
less than 18.0 less than 22.0
Gas pipe Ø15.9 Ø15.9 Ø22.2
Liquid pipe Ø9.5 Ø9.5 Ø12.7*1
Suction gas pipe Ø15.9 Ø15.9 Ø22.2
Discharge gas pipe Ø12.7 Ø12.7 Ø19.1
Liquid pipe Ø9.5 Ø9.5 Ø12.7*1
588
Attached pipe
Attached pipe
Pipe procured locally
Pipe procured locally
Gas pipe
Liquid pipe
Pipe procured locally
Pipe procured locally
Discharge gas pipe
Liquid pipe
Suction gas pipe
Pipe procured locally
Discharge gas pipe
Liquid pipe
Suction gas pipe
Gas pipe
Liquid pipe
Discharge gas pipe
Liquid pipe
Liquid pipe
Gas pipe
Suction gas pipe
Pipe procured locally
Wet cloth
Remove the cap.
Insert the connecting pipe.
* Be sure to wrap the pipe with wet cloth when applying brazing.
Apply brazing to full circumference.
<RBM-Y1123FE (Use pipes attached with the Flow Selector unit.)>
<RBM-Y1123FE, RBM-Y1803FE>
<RBM-Y2803FE (Use pipes attached with the Flow Selector unit.)>
CAUTION
• For a brazing work of the refrigerant pipes, be sure to use nitrogen gas in order to prevent oxidation of the
inside of the pipes; otherwise clogging of the refrigerating cycle due to oxidized scale may occur.
* Remove all flux after brazing.

6
English-12English-11


Airtight test/Air purge, etc.
For airtight test, air purge, addition of refrigerant, and gas leak check, follow the Installation Manual attached to
the outdoor unit.
REQUIREMENT
Be sure to use the tool such as charge hose exclusive to R410A.
Do not turn on the power until the airtight test and the vacuuming have finished.
(If turning on the power, the incorporated PMV is closed fully and the period until the vacuuming finishes elongates.)


Open fully valves of the outdoor unit


Gas leak check
Check with a leak detector or soap water whether gas leaks or not, from the pipe connecting section.
REQUIREMENT
Use a leak detector manufactured exclusively for HFC refrigerant (R410A, R134a, etc.).


Heat insulating process
Perform heat insulating for pipes at liquid side and gas
side separately.
In cooling time, temperature at both liquid and gas sides
becomes lower.
Therefore, perform heat insulating process sufficiently to
avoid dewing.
• For heat insulator of pipe at gas side, be sure to use
one with heat-resisting temp. 120°C or more.
• Using the attached heat insulating pipe, perform heat
insulating process securely for pipe connecting part of
the Flow Selector units without clearance.
REQUIREMENT
Apply the heat insulation to the pipe connecting section of the Flow Selector unit securely up to the root without
exposure of the pipe. (The pipe exposed to the outside causes water leak.)
Flow Selector unit
Heat insulating
pipe (Attached)
Binding band
(Local supply)
Heat insulator
The upper slit
6ELECTRIC WORK
WARNING
1. Using the specified wires, ensure to connect the wires, and fix wires securely so that the external
strength of the wires do not transmit to the connecting part of the terminals.
Incomplete connection or fixation may cause fire, etc.
2. Be sure to connect earth wire. (Grounding work)
Do not connect the earth wire to gas pipe, city water pipe, lightning rod, or the earth wire of telephone.
Incomplete grounding causes an electric shock.
3. For electric work, strictly follow to the Local Regulation in each country and the Installation
Manual, and use an exclusive circuit.
Capacity shortage of power circuit or incomplete installation may an electric shock or ftre.
REQUIREMENT
• Perform the electric wiring so that it does not come to contact with the high-temperature part of the pipe.
The coating may melt resulted in an accident.
• After connecting wires to the terminal blocks, provide a trap and fix wires with the wire clamp.
• Store the refrigerant piping line and control wiring line in the same line.
• Do not turn on the power of the indoor unit until vacuuming of the refrigerant pipes completes.


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.
5REFRIGERANT PIPING

7
English-14English-13
[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.
• If the distance between indoor unit and Flow Selector unit exceeds 5m, connect by using the extension cable kit
(RBC-CBK15FE). (Sold separately)
RBM-Y1123FE, RBM-Y1803FE / RBM-Y2803FE
Earth
screw
Earth screw
Attached wire
(Power supply)
Attached wire
(Control wiring)
Power supply
1 ~ 220–240V
Indoor unit
Flow Selector unit
SVS SVS
12345
SVD
R(L)
SVD
MCC-1431
MCC-1431
Control P.C. board
for indoor unit
Control P.C. board
for indoor unit
13579
SVS SVSS SVDD
13 13
12 435
5
12 435
S(N)
CN01
( )
CN10
( )
CN67
( )
CN02
( )
CN81
( )
RBM-Y2803FE only RBM-Y2803FE only
RBM-Y2803FE and
RBM-Y1803FE only
WHITE ORANGE BLUE YELLOW BROWN RED GREEN BLACK
6 7
6 1
1234 5
8
8
8
7
[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 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 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.
RBM-Y1123FE, RBM-Y1803FE RBM-Y2803FE
Cord clamp (Control wiring)
Attached wire
(Control wire)
Attached wire
(Power supply)
CN02 (Green)
CN01 (Red)
Earth screw
Fixing screw
(4 parts)
Earth screw
Cord clamp
Attached wire
(Power supply)
CN01(Red)
Control
P.C. board
Control
P.C. board
Fixing screw
(4 parts)
CN02
(Green)
Cord clamp


System wiring diagram
Power supply
Single phase
220 ~ 240V,
50Hz
Power supply
220 ~ 240V, 50Hz
Outdoor Power supply
380V
~ 415V 3N ~ 50Hz
Control wiring between indoor and outdoor units
Control wiring between outdoor units
CN
01
Earth
terminal
Earth
terminal
Earth
terminal
Earth
terminal
CN
02 CN81
U1
1
3
5 5 5
U2
U1 U2 U3 U4L1 L2 L3 NU5 U6
L N A B
A B
98
CN
01
Earth
terminal
Earth
terminal
CN
02 CN81
U1
3
U2
L N A B
A B
CN
01
Earth
terminal
Earth
terminal
CN
02 CN81
U1
4 4 4
3 3
777
U2
L N A B
A B
Earth
terminal
U1 U2
L N A B
L N
U1
U3
U2
U4
8 8
6
8 8
Outdoor Power supply
380V~415V 3N~50Hz
Earth
terminal
Open
2
U1 U2 U3 U4L1 L2 L3 NU5 U6
Control wiring between outdoor units
Header outdoor unit
Outdoor Power supply
380V
~ 415V 3N ~ 50Hz
Earth
terminal
2
1
U1 U2 U3 U4L1 L2 L3 NU5 U6
Follower outdoor unit
2
Indoor unit
3
Flow Selector (FS) unit
4
Remote controller
5
Central remote controller
6
Pull box
7
Circuit breaker
8
Main switch
9
Group control
When connecting the plural indoor units to a FS unit.
NOTE :
Control wire and power wire between FS unit and indoor unit are the accessory parts of FS unit. (Wire length : 6m)
If the length between indoor and FS unit exceeds 5m, connect by using the connection cable kit sold separately
(RBC-CBK15FE).
6ELECTRIC WORK

8
English-16English-15
[Indoor unit]
See also the Installation Manual supplied with the indoor unit.
• Remove the electrical parts box cover from the indoor unit.
• Connect the faston (R(L) and S(N)) on the attached wire (power supply) to a free area on the R(L), S(N)
terminal block for power supply.
Concealed Duct High Static Pressure Type (MMD-AP0724H∗, AP0964H∗Series)
Secure here.
CN081
(Black)
Attached wire
(Control wiring)
Earth screw
Earth screw for
Flow Selector unit Attached wire
(Power supply)
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).
Wire joint (Attached)Indoor P.C. board


Connections
CAUTION
Connect the wire to the lead wires with wire joint on the R(L), S(N) terminal block for power supply, using the
following procedure:
Cut the wire joint on each lead wire, and cut the faston (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.
4-way Air Discharge Cassette Type (MMU-AP∗∗∗4HP∗Series)
Compact 4-way Cassette Type (MMU-AP∗∗∗MH Series)
R(L), S(N) terminal block
for power supply
Indoor P.C. board
Faston connection
Earth screw
Earth screw
Power supply Attached wire (Power supply)
Attached wire (Control wiring)
Clamp with remote controller lead wires
CN081 (Black)
Attached wire
(Power supply)
Cord clamp
Earth screw for
Flow Selector unit
Faston connection
R(L), S(N)
terminal block
for power supply
Indoor/Outdoor inter-unit cable/
Remote controller terminal block Attached wire
(Control wiring)
CN081
6ELECTRIC WORK

9
English-18English-17
2-way Air Discharge Cassette Type (MMU-AP∗∗∗2WH Series)
Attached wire
(Power supply)
Attached wire
(Control wiring)
Indoor P.C. board
CN081 (Black)
Faston connection
Earth screw
R(L), S(N) terminal block
for power supply
TT-03-1
R(L), S(N) terminal block
for power supply
Attached wire
(Power supply)
Cord clamp
Power supply
Attached wire
(Control wiring)
Indoor
P.C. board
CN081
Earth screw
Earth screw for
Flow Selector unit
NOTE :
1-way Air Discharge Cassette Type (MMU-AP∗∗∗SH Series)
wiring refer to the Under Ceiling Type (page 11).
1-way Air Discharge Cassette Type (MMU-AP∗∗∗YH Series)
Floor Standing Type (MMF-AP∗∗∗H Series)
R(L) S(N)
DON’T APPLY 220-240V
FOR INTER-UNIT FOR REMOTE CONTROL
Indoor P.C. board
CN081
Attached wire
(Power supply)
Cord clamp
Attached wire
(Control wiring)
Earth screw for Flow Selector unit
Faston connection
R(L), S(N)
terminal block
for power supply
6ELECTRIC WORK
Slim Duct Type (MMD-AP∗∗∗SPH Series)
Earth screw for
flow selector unit
Attached wire
(Power supply)
CN081
(BLACK)
Power supply
Cord clamp
Control wire for
flow selector

10
English-20English-19
CN081
(BLACK)
Attached wire
(Control wiring)
Earth screw for
Flow Selector unit
Attached wire
(Power supply)
Power supply
Cord clamp
Faston connection
R(L), S(N)
terminal block
for power supply
Earth screw
Concealed Duct Standard Type (MMD-AP∗∗6BHP∗Series)
Concealed Duct High Static Pressure Type (MMD-AP∗∗6HP∗Series)
6ELECTRIC WORK
1-way Air Discharge Cassette Type (MMU-AP∗∗∗SH Series)
Indoor P.C. board
R(L) S(N)
DON’T APPLY 220-240V
FOR INTER-UNIT FOR REMOTE CONTROL
Attached wire
(Power supply)
Power supply
Cord clamp
Cord clamp
CN081 (Black)
Earth screw for Flow Selector unit
Earth screw
Faston connection
R(L), S(N) terminal
block for power supply Attached wire
(Control wiring)
Under Ceiling Type (MMC-AP∗∗∗7H Series)
CN81 (Black)Indoor P.C. board
Earth screw
Terminal
block for
power supply
Faston
connection
Attached wire
(Control wiring)
Attached wire
(Power supply)

11
English-22English-21
High Wall Type (MMK-AP∗∗∗4MH Series)
For the Flow Selector unit that has power supply cord, connect a power supply cable to it as mentioned below.
1. Open the air inlet grille upward.
2. Remove the four screws securing the front panel.
3. Slightly open the lower part of the front panel then pull the upper part of the front panel toward you to
remove it from the rear plate.
4. After removing the front panel, remove the wiring cover and the cord clamp.
5. Connect and secure the power supply cable of Flow Selector unit and secure the cord clamp.
6. The control wires are included in terminal block part of the power supply.
Take out the control wires outwards through the slit of the terminal block.
7. Fasten the wiring cover surely with screws.
8. Connect the control wire taken out through the slit on the terminal block and the control wire from the Flow
Selector unit at the relay terminal section.
Earth line
Terminal
block Cord clamp
Screw
Screw
Wiring cover
Slit of the
terminal block
Screw
Power supply cable
of Flow Selector unit
Terminal
block
Control wire from the
Flow Selector unit
Control wire
High Wall Type (MMK-AP∗∗∗3H Series)
Connect the power supply wire and the communication wire supplied with the flow selector unit to the indoor unit.
1. Remove the air inlet grille. Open the air inlet grille upward and pull it toward you.
2. Remove the four screws securing the front panel.
3. Slightly open the lower part of the front panel, and then pull the upper part of the front panel toward you to
remove it from the rear plate.
4. Remove the terminal cover and the clamp base.
5. Insert the control wire fully into the control/wired remote controller terminal block and secure it tightly with
screws.
6. Connect the control wire connector of the flow selector unit to the lead with a connector to the left of the
control/wired remote controller terminal block.
7. Clamp the control wire and the control wire of the flow selector unit with the cord clamp.
8. Install the clamp base with a screw.
9. Insert the power supply wire fully into the terminal block and secure it tightly with screws.
Tightening torque: 1.2 N•m (0.12 kgf•m). Secure the earth line with the earth screw.
10. Clamp the power supply wire with the cord clamp.
11. Insert the power supply wire faston terminal of the flow selector unit into the power supply terminal.
Secure the earth line with the earth screw.
12. Clamp the power supply wire of the flow selector unit tight with the cord clamp.
13. Attach the terminal cover, the front panel and the air inlet grille to the indoor unit.
R(L)
ABU1U2
S(N)
Power supply
terminal block
Earth screw for
flow selector unit
Cord clamp
Power supply wire
of flow selector unit
Cord clamp
Power supply wire
Terminal block
for control / wired
remote controller wiring
Control wire
Control wire from
the flow selector
Connector
6ELECTRIC WORK
CAUTION
Confirm that every wires are stored in the electric parts box without getting caught before attaching the
terminal cover.

12
English-24English-23
Floor Standing Cabinet Type (MML-AP∗∗∗H Series)
Floor Standing Concealed Type (MML-AP∗∗∗BH Series)
Earth screw
Earth screw for Flow Selector unit
Attached wire
(Control wiring)
Attached wire
(Power supply)
R(L), S(N) terminal
block for power supply
Faston connection
Indoor P.C. board CN081 (Black)
Cord clamp
R(L) S(N)
DON’T APPLY 220-240V
FOR INTER-UNIT FOR REMOTE CONTROL
Indoor P.C. board
CN081
Attached wire
(Control wiring)
Earth screw for
Flow Selector unit
Faston connection
R(L), S(N) terminal block
for power supply
Attached wire
(Power supply)
Cord clamp Power supply
Earth screw
Air to Air Heat Exchanger with DX Coil Unit (MMD-VN∗∗∗HEXE Series)
6ELECTRIC WORK
Attached wire
(Power supply)
Attached wire
(Control wiring)
Faston connection
R(L), S(N) terminal block
for power supply
Earth screw
Indoor P.C. board

13
English-26English-25
Console Type (MML-AP∗∗∗H Series)
R(L)S(N)
Connect the power supply wire and the communication wire supplied with the flow selector unit to the indoor unit.
1.Removing the front panel.
2.Remove the terminal cover and cord clamp.
3.Take apower supply wire and control wire
(according to the local rule) into the pipe hole on the hole.
4.Take the power supply wire out of the cable slot on the rear panel so that it producesabout 430 mm from the front.
5.Insert the power supply wire fully into the terminal block and secure it tightly with screws.
Tighten torque: 1.2 N/m (0.12 kgf/m)
6.Insert the power supply wire faston terminal of the flow selector unit into the power supply terminal.
Secure the earth line with the earth screw.
7.Connect the control wire connector of flow selector unit to the control wire.
8. Clamp the power supply wire with the cord clamp.
9.Attach the terminal cover with ascrew
10.Take the control wire out of the cable slot on the rear panel so that it producesabout 600 mm from the front.
11.Remove the terminal cover (UP)
12.Remove the LED BASE
13.Insert the control wire fully into the control/Wired remote controller terminal block , , , and secure it
tightly with screws.
14.Clamp the control wire with the cord clamp.
15.Attach the LED base, terminal cover (UP) and front panel
Cord clamp for
flow selector unit
Cord clamp
Connector
Power supply wire
of flow selector unit
Control wire from
the flow selector
Power supply terminal block
Earth screw for
flow selector unit
Control wire
6ELECTRIC WORK
Concealed Duct High Static Pressure Type (MMD-AP0726HP∗, AP0966HP∗)
CN81
(BLACK)
Cord clamp
Attached wire
(Control wiring)
Earth screw for
Flow Selector unit
Attached wire
(Power supply)
L, N, 3(L), 4(N)
terminal block
for power supply
L
LN34
N
Earth screw
Cord clamp
Faston connection
Power supply

14


Setting when connecting multiple indoor units to a Flow Selector (FS) unit
[Cautions to connection of indoor unit]
• When connecting the multiple indoor units to a single FS unit, it is necessary to set up the Item code.
Be sure to set up the Item code after setup of address.
• When connecting the multiple indoor units to a single FS unit, only group control is available.
For the indoor unit, a remote controller cannot be individually connected.
[How to set up Item code]
1Push
VENT
+
TEST
buttons simultaneously for
4 seconds or more.
•is displayed in the UNIT No. window.
• In this time, the fans of all the indoor units in
the group control start the fan operation.
2Using the set temperature buttons /
, select the Item code “0E”.
3Change SET DATA to “01” by the timer
buttons / .
4Push
SET
button.
5Push
TEST
button. Then the setup finished.
Incorrect example of connection
When connecting the multiple indoor units to a single FS
unit, the indoor units which are connected with the
multiple FS units are unavailable for the group control by
a single remote controller.
For the indoor unit, a remote controller cannot be
individually connected.
Control wiring between
indoor unit and FS unit
Piping
Remote controller
FS unit
Group control
Indoor unit
Control wiring
between
indoor unit
and FS unit
Piping
Piping
Remote controller
FS unit
Group control
Indoor
unit Control wiring
between
indoor unit
and FS unit
FS unit
NO GOOD
NO GOOD
Piping
Remote controller
FS unit
Indoor
unit
4
5
3
1
2
TEMP.
O
N
/
O
F
F
S
E
T
TIME
TE
ST
FIL
TER
RE
S
E
T
CL
S
AV
E
S
WIN
G/
FI
X
VENT
U
NIT L
OU
VE
R
CODE No.
UNIT No.
R.C.
R
N
o.
TIMER
S
E
T
M
O
D
E
FAN
SET DATA
SETTING
English-27 English-28
6ELECTRIC WORK

EH99893801-2
TOSHIBA CTOSHIBA C
TOSHIBA CTOSHIBA C
TOSHIBA CARRIER CORPORAARRIER CORPORA
ARRIER CORPORAARRIER CORPORA
ARRIER CORPORATIONTION
TIONTION
TION
336, TADEHARA, FUJI-SHI, SHIZUOKA-KEN, 416-8521, JAPAN