2-1 System Configurations... 21 2-2 Types and Maximum Allowable Length of Cables... 23 2-3 Switch Settings ... 24 2-4 M-NET Address Settings ... 25 2-4-1 Address Settings List ... 25 2-4-2 Outdoor Unit Power Jumper Connector Connection... 26 2-4-3 Outdoor Unit Centralized Controller Switch Setting ... 26 2-4-4 Room Temperature Detection Position Selection ... 27 2-4-5 Start/Stop Control of Indoor Units ... 27 2-4-6 Miscellaneous Settings ... 27 2-4-7 Various Control Methods Using the Signal Input/Output Connector on Outdoor Unit ... 28 2-5 Demand Control Overview ... 31 2-6 System Connection Example... 32 2-7 Example System with an MA Remote Controller ... 34 2-7-1 Single Refrigerant System (Automatic Indoor/Outdoor Address Startup)... 34 2-7-2 Single Refrigerant System with Two or More LOSSNAY Units ... 36 2-7-3 Grouped Operation of Units in Separate Refrigerant Circuits... 38 2-7-4 System with a Connection of System Controller to Centralized Control Transmission Line... 40 2-7-5 System with a Connection of System Controller to Indoor-Outdoor Transmission Line ... 42 2-7-6 System with Multiple BC Controllers... 44 2-8 Example System with an ME Remote Controller ... 48 2-8-1 System with a Connection of System Controller to Centralized Control Transmission Line... 48 2-9 Example System with an MA and an ME Remote Controller ... 50 2-9-1 System with a Connection of System Controller to Centralized Control Transmission Line... 50 2-10 Restrictions on Refrigerant Pipes ... 53 2-10-1 Restrictions on Refrigerant Pipe Length ... 53 2-10-2 Restrictions on Refrigerant Pipe Size ... 59 2-10-3 BC Controller Connection Method ... 60
2 Restrictions
2 Restrictions
2-1 System Configurations
1. Table of compatible indoor units
The table below summarizes the types of indoor units that are compatible with different types of outdoor units.
(1) Standard combinations
1) "Maximum total capacity of connectable indoor units" refers to the sum of the numeric values in the indoor unit model names.
2) If the total capacity of the indoor units that are connected to a given outdoor unit exceeds the capacity of the outdoor unit, the indoor units will not be able to perform at the rated capacity when they are operated simultaneously. Select a combination of units so that the total capacity of the connected indoor units is at or below the capacity of the outdoor unit whenever possible.
Outdoor units Composing units Maximum total ca-
pacity of connect- able indoor units
Maximum number of connectable in-
door units
Types of connect- able indoor units
P200 YLM-A(1) - - 100 - 300 20 P15 - P250 models
R410A series in- door units
P250 YLM-A(1) - - 125 - 375 25
P300 YLM-A(1) - - 150 - 450 30
P350 YLM-A(1) - - 175 - 525 35
P400 YLM-A(1) - - 200 - 600 40
P400 YSLM-A(1) P200YLM-A(1) P200YLM-A(1) 200 - 600
P450 YLM-A(1) - - 225 - 675 45
P450 YSLM-A(1) P250YLM-A(1) P200YLM-A(1) 225 - 675
P500 YLM-A(1) - - 250 - 750 50
P500 YSLM-A(1) P250YLM-A(1) P250YLM-A(1) 250 - 750 P550 YSLM-A(1) P300YLM-A(1) P250YLM-A(1) 275 - 825 P600 YSLM-A(1) P300YLM-A(1) P300YLM-A(1) 300 - 900 P650 YSLM-A(1) P350YLM-A(1) P300YLM-A(1) 325 - 975 P700 YSLM-A(1) P350YLM-A(1) P350YLM-A(1) 350 - 1050 P750 YSLM-A(1) P400YLM-A(1) P350YLM-A(1) 375 - 1125 P800 YSLM-A(1) P400YLM-A(1) P400YLM-A(1) 400 - 1200 P850 YSLM-A(1) P450YLM-A(1) P400YLM-A(1) 425 - 1275 P900 YSLM-A(1) P450YLM-A(1) P450YLM-A(1) 450 - 1350
(2) High COP combinations
1) "Maximum total capacity of connectable indoor units" refers to the sum of the numeric values in the indoor unit model names.
2) If the total capacity of the indoor units that are connected to a given outdoor unit exceeds the capacity of the outdoor unit, the indoor units will not be able to perform at the rated capacity when they are operated simultaneously. Select a combination of units so that the total capacity of the connected indoor units is at or below the capacity of the outdoor unit whenever possible.
Outdoor units Composing units Maximum total ca-
pacity of connect- able indoor units
Maximum number of connectable in-
door units
Types of connect- able indoor units
EP200 YLM-A - - 100 - 300 20 P15 - P250 models
R410A series in- door units
EP250 YLM-A - - 125 - 375 25
EP300 YLM-A - - 150 - 450 30
EP350 YLM-A - - 175 - 525 35
EP400 YLM-A - - 200 - 600 40
EP450 YLM-A - - 225 - 675 45
EP500 YLM-A - - 250 - 750 50
EP500 YSLM-A EP250YLM-A EP250YLM-A 250 - 750
EP550 YSLM-A EP300YLM-A EP250YLM-A 275 - 825
EP600 YSLM-A EP300YLM-A EP300YLM-A 300 - 900
EP650 YSLM-A EP350YLM-A EP300YLM-A 325 - 975
EP700 YSLM-A EP350YLM-A EP350YLM-A 350 - 1050
EP750 YSLM-A EP400YLM-A EP350YLM-A 375 - 1125
EP800 YSLM-A EP400YLM-A EP400YLM-A 400 - 1200
EP850 YSLM-A EP450YLM-A EP400YLM-A 425 - 1275
EP900 YSLM-A EP450YLM-A EP450YLM-A 450 - 1350
2 Restrictions
2-2 Types and Maximum Allowable Length of Cables
1. Wiring work (1) Notes
1) Have all electrical work performed by an authorized electrician according to the local regulations and instructions in this man- 2) Install external transmission cables at least 5cm [1-31/32"] away from the power supply cable to avoid noise interference.ual.
(Do not put the control cable and power supply cable in the same conduit tube.) 3) Provide grounding for the outdoor unit as required.
4) Run the cable from the electric box of the indoor or outdoor unit in such way that the box is accessible for servicing.
5) Do not connect power supply wiring to the terminal block for transmission line. Doing so will damage the electronic compo- nents on the terminal block.
6) Use 2-core shielded cables as transmission cables.
Do not use a single multiple-core cable to connect indoor units that belong to different refrigerant systems. Doing so may result in signal transmission errors and malfunctions.
7) When extending the transmission cable, be sure to extend the shield wire.
(2) Control wiring
Different types of control wiring are used for different systems. Before performing wiring work, refer to the following page(s).
[2-7 Example System with an MA Remote Controller](page 34) [2-8 Example System with an ME Remote Controller](page 48)
[2-9 Example System with an MA and an ME Remote Controller](page 50) Types and maximum allowable length of cables
Control lines are categorized into 2 types: transmission line and remote controller line.
Use the appropriate type of cables and observe the maximum allowable length specified for a given system. If a given system has a long transmission line or if a noise source is located near the unit, place the unit away from the noise source to reduce noise interference.
1) M-NET transmission line
Cable type
Facility type All facility types
Type Shielded cable CVVS, CPEVS, MVVS
Number of
cores 2-core cable
Cable size Larger than 1.25mm2 [AWG16]
Maximum transmission line dis- tance between the outdoor unit and
the farthest indoor unit 200 m [656ft] max.
Maximum transmission line dis- tance for centralized control and In- door/outdoor transmission line (Maximum line distance via outdoor unit)
500 m [1640ft] max.
*The maximum overall line length from the power supply unit on the transmission lines for centralized control to each outdoor unit or to the system controller is 200m [656ft] max.
TB3TB
7 TB
3TB 7
TB3TB
7 TB
3TB 7
TB3TB
7 TB
3TB 7
TB3TB
7 TB
3TB 7
TB3: Terminal block for indoor-outdoor transmission line TB7: Terminal block for centralized control
multiple-core cable
BC Controller Indoor unit
Remote Controller Remote Controller
2-core shielded cable 2-core shielded cable
Outdoor unit BC Controller Indoor unit
Outdoor unit
*1 MA remote controller refers to MA remote controller (PAR-31MAA, PAR-21MAA), MA simple remote controller, and wireless remote controller.
*2 ME remote controller refers to ME remote controller, Compact ME remote controller, and LOSSNAY remote control- ler.
*3 The use of cables that are smaller than 0.75mm2 (AWG18) is recommended for easy handling.
*4 When connected to the terminal block on the Simple remote controller, use cables that meet the cable size specifi- cations shown in the parenthesis.
*5 When connecting PAR-31MAA or MA Simple remote controller, use sheathed cables with a minimum thickness of 0.3 mm2.
2-3 Switch Settings
1. Switch setting
The necessary switch settings depend on system configuration. Before performing wiring work, refer to the following page(s).
[2-7 Example System with an MA Remote Controller](page 34) [2-8 Example System with an ME Remote Controller](page 48)
[2-9 Example System with an MA and an ME Remote Controller](page 50)
If the switch settings are changed while the unit is being powered, those changes will not take effect, and the unit will not function properly.
*1. Applicable when LOSSNAY units are connected to the indoor-outdoor transmission line.
*2. The outdoor units in the same refrigerant circuit are automatically designated as OC and OS in the order of capacity from large to small (if two or more units have the same capacity, in the order of address from small to large).
*3. Turn off the power to all the outdoor units in the same refrigerant circuit.
*4. When a PAR-31MAA is connected to a group, no other MA remote controllers can be connected to the same group.
*4. When setting the switch SW4 of the control board, set it with the outdoor unit power on. Refer to the following page(s).
[5-1-1 Outdoor Unit Switch Functions and Factory Settings](page 127)
MA remote controller*1 ME remote controller*2
Cable type
Type VCTF, VCTFK, CVV, CVS, VVR, VVF, VCT Shielded cables CVVS, CPEVS, and MVVS Number of
cores 2-core cable 2-core cable
Cable size 0.3 to 1.25mm2 *3 *5 [AWG22 to 16]
0.3 to 1.25mm2 *3 [AWG22 to 16]
(0.75 to 1.25mm2 ) *4 [AWG18 to 16]
Maximum overall line
length 200 m [656ft] max. The section of the cable that exceeds 10m
[32ft] must be included in the maximum in- door-outdoor transmission line distance.
Units on which to set the switches Symbol Units to which the power must be shut off CITY MULTI indoor unit Main/sub unit IC Outdoor units *3 and Indoor units
LOSSNAY, OA processing unit *1 LC Outdoor units *3 and LOSSNAY
ATW Booster Unit BU Outdoor units and Booster Unit
Water Hex Unit AU Outdoor units and Water Hex Unit ME remote controller Main/sub remote
controller RC Outdoor units *3
MA remote controller*4 Main/sub remote
controller MA Indoor units
CITY MULTI outdoor unit*2 OC,OS Outdoor units *3
BC controller Main BC Outdoor units *3 and BC controller
Sub1, 2 BS1, BS2 Outdoor units *3 *5 and BC controller
2 Restrictions
2-4 M-NET Address Settings
2-4-1 Address Settings List
1. M-NET Address settings (1) Address settings table
The need for address settings and the range of address setting depend on the configuration of the system.
*1. If a given address overlaps any of the addresses that are assigned to other units, use a different, unused address within the setting range.
*2. To set the outdoor unit address or the auxiliary outdoor unit address to "100," set the rotary switches to "50."
*3. To set the ME remote controller address to "200," set the rotary switches to "00."
*4. Some models of indoor units have two or three control boards.
Assign an address to the No.1, No. 2, and No. 3 control boards so that the No. 2 control board address equals the No. 1 control board address plus 1, and that the No. 3 control board address equals the No. 1 control board address plus 2.
*5. The outdoor units in the same refrigerant circuit are automatically designated as OC, and OS. They are designated as OC, and OS in the descending order of capacity (ascending order of address if the capacities are the same).
*6. No address settings are required for units in a system with a single outdoor unit (with some exceptions).
Address setting is required if a sub BC controller is connected.
*7. If a given address overlaps any of the addresses that are assigned to other units, use a different, unused address within the setting range.
Unit or controller Sym-
bol Address setting range
Setting method Factory
address setting CITY MULTI
indoor unit Main/sub unit IC 0, 01 to
50*1 *4 *6*7 Assign the smallest address to the main indoor unit in the group, and assign sequential address numbers to the rest of the indoor units in the same group.
In an R2 system with a sub BC controller, make the settings for the indoor units in the following order.
(i) Indoor unit to be connected to the main BC controller (ii) Indoor unit to be connected to sub BC controller 1 (iii) Indoor unit to be connected to sub BC controller 2 Make the settings for the indoor units in the way that the for- mula "(i) < (ii) < (iii)" is true.
00 M-NET
adapter M-NET con- trol interface Free Plan adapter
LOSSNAY, OA processing unit LC 0, 01 to
50*1 *4 *6 *7 Assign an arbitrary but unique address to each of these units after assigning an address to all indoor units. 00
ATW Booster Unit BU
Water Hex Unit AU
ME remote
controller Main remote
controller RC 101 to 150 Add 100 to the smallest address of all the indoor units in the
same group. 101
Sub remote
controller RC 151 to
200*3 Add 150 to the smallest address of all the indoor units in the same group.
MA remote controller MA No address settings required. (The main/sub setting must be made if 2 re-
mote controllers are connected to the system.)*8 Main
CITY MULTI outdoor unit OC
OS 0, 51 to 100*1 *2 *6
*7
Assign an address that equals the lowest address of the in- door units in the same refrigerant circuit plus 50.
Assign sequential addresses to the outdoor units in the same refrigerant circuit. The outdoor units in the same re- frigerant circuit are automatically designated as OC and OS. *5
00
Auxiliary out-
door unit BC controller
(main) BC 0, 51 to
100*1 *2 *6 Assign an address that equals the address of the outdoor unit in the same refrigerant system plus 1.
If a given address overlaps any of the addresses that are assigned to the outdoor units or to the sub BC controller, use a different, unused address within the setting range.
00
BC controller
(sub1, 2) BS1
BS2 51 to 100
*2 Assign an address to both the sub BC controller 1 and 2 that equals the lowest address of the indoor units that are connected to each of them plus 50.
If a sub BC controller is connected, the automatic startup function is not available.
2-4-2 Outdoor Unit Power Jumper Connector Connection
There are limitations on the total number of units that are connectable to each refrigerant system. Refer to the DATABOOK for details.
*1 The need for a power supply unit for transmission lines depends on the system configuration. Some controllers, such as GB-50ADA, have a function to supply power to the transmission lines.
*2 The replacement of the power jumper connector from CN41 to CN40 must be performed on only one outdoor unit in the system.
2-4-3 Outdoor Unit Centralized Controller Switch Setting
*1 Set SW5-1 on all outdoor units in the same refrigerant circuit to the same setting.
*2 When only the LM adapter is connected, leave SW5-1 to OFF (as it is).
Unit or controller Sym-
bol Address setting range
Setting method Factory
address setting System con-
troller Group remote control-
ler GR
SC 201 to 250 Assign an address that equals the sum of the smallest group number of the group to be controlled and 200. 201 System remote con-
troller SR
SC Assign an arbitrary but unique address within the range listed on the left to each unit.
ON/OFF remote con
troller AN
SC Assign an address that equals the sum of the smallest group number of the group to be controlled and 200.
Schedule timer (com- patible with M-NET) ST
SC Assign an arbitrary but unique address within the range listed
on the left to each unit. 202
Central controller AE-200
AG-150A GB-50ADA G(B)-50A
TRSC 0, 201 to
250 Assign an arbitrary but unique address within the range listed on the left to each unit. The address must be set to "0" to con- trol the K-control unit.
000
LM adapter SC 201 to 250 Assign an arbitrary but unique address within the range listed
on the left to each unit. 247
System configu-
ration Connection to
the system con- troller
Power supply unit for transmission lines
Group operation of units in a sys- tem with multiple outdoor units
Power supply switch connector connection
System with
one outdoor unit _ _ _ Leave CN41 as it is
(Factory setting) System with
multiple outdoor units
Not connected _ Not grouped
Not required Grouped Disconnect the male connector from the fe- male power supply switch connector (CN41) and connect it to the female power supply switch connector (CN40) on only one of the outdoor units.*2
*Connect the S (shielded) terminal on the ter- minal block (TB7) on the outdoor unit whose CN41 was replaced with CN40 to the ground terminal ( ) on the electric box.
With connection to the indoor unit system
Not required Grouped/not grouped With connection
to the central- ized control system
Not required*1 (Powered from the outdoor unit)
Grouped/not grouped
Required *1 Grouped/not
grouped Leave CN41 as it is (Factory setting)
System configuration Centralized control switch (SW5-1) settings *1 Connection to the system controller Not connected Leave it to OFF. (Factory setting)
Connection to the system controller Connected *2 ON
2 Restrictions
2-4-4 Room Temperature Detection Position Selection
To stop the fan during heating Thermo-OFF (SW1-7 and 1-8 on the indoor units to be set to ON), use the built-in thermistor on the remote controller or an optional thermistor.
1) To use the built-in sensor on the remote controller, set the SW1-1 to ON.
(Factory setting: SW1-1 set to "OFF".)
Some models of remote controllers are not equipped with a built-in temperature sensor.
Use the built-in temperature sensor on the indoor unit instead.
When using the built-in sensor on the remote controller, install the remote controller where room temperature can be detected.
(Note) Factory setting for SW1-1 on the indoor unit of the All-Fresh Models is ON.
2) When an optional temperature sensor is used, set SW1-1 to OFF, and set SW3-8 to ON.
When using an optional temperature sensor, install it where room temperature can be detected.
2-4-5 Start/Stop Control of Indoor Units
Each indoor unit (or group of indoor units) can be controlled individually by setting SW 1-9 and 1-10.
*1. Do not shut off power to the outdoor units. Doing so will cut off the power supply to the compressors and the heater on the outdoor units and may result in compressor malfunction when operation is restored after a power failure.
*2. Not applicable to units with a built-in drain pump or humidifier.
*3. Models with a built-in drain pump cannot be turned on/off by the plug individually. All the units in the same refrigerant cir- cuits will be turned on or off by the plug.
*4. Requires that the dipswitch settings for all the units in the group be made.
*5. To control the external input to and output from the air conditioners with the PLC software for general equipment via the AE-200,AG-150A, GB-50ADA, or G(B)-50A, set SW1-9 and SW1-10 to ON. With these settings made, the power start- stop function becomes disabled. To use the auto recovery function after power failure while these settings are made, set SW1-5 to ON.
2-4-6 Miscellaneous Settings
Cooling-only setting for the indoor unit: Cooling only model (Factory setting: SW3-1 "OFF.") When using indoor unit as a cooling-only unit, set SW3-1 to ON.
Function Operation of the indoor unit when the operation is resumed after the unit was stopped
Setting (SW1)*4 *5
9 10
Power ON/OFF by
the plug*1,*2,*3 Indoor unit will go into operation regardless of its operation status before power
off (power failure). (In approx. 5 minutes) OFF ON
Automatic restoration
after power failure Indoor unit will go into operation if it was in operation when the power was
turned off (or cut off due to power failure). (In approx. 5 minutes) ON OFF Indoor unit will remain stopped regardless of its operation status before power
off (power failure). OFF OFF
2-4-7 Various Control Methods Using the Signal Input/Output Connector on Outdoor Unit
(1) Various connection options
*1 For details, refer to section (2) Example of wiring connection.
*2 For details, refer to section (2) Example of wiring connection and other relevant sections in the manual. [2-5 Demand Control Overview](page 31)
*3 Low-noise mode is valid when Dip SW6-8 on the outdoor unit is set to OFF. When DIP SW6-8 is set to ON, 4 levels of on- DEMAND are possible, using different configurations of low-noise mode input and DEMAND input settings.When 2 or more outdoor units exist in one refrigerant circuit system, 8 levels of on-DEMAND are possible.
*4. By setting Dip SW6-7, the Low-noise mode can be switched between the Capacity priority mode and the Low-noise priority mode.
When SW6-7 is set to ON: The low-noise mode always remains effective.
When SW6-7 is set to OFF: The low noise mode is cancelled when certain outside temperature or pressure criteria are met, and the unit goes into normal operation (capacity priority mode).
*5 If multiple outdoor units are connected to the same refrigerant circuit, signal input/output settings need to be made for each outdoor unit.
*6 Take out signals from the outdoor unit that is designated as OC if multiple outdoor units in the same system.
*7 If the formula TH7>5 holds true, the fan will not go into operation when the contact receives signal input.
*8 When using a base heater, change the setting using SW4. When using a base heater, error output will not be available.
Type Usage Function Terminal to be
used*1 Option Input Prohibiting cooling/heating operation (thermo OFF) by an external
input to the outdoor unit.
*It can be used as the DEMAND control device for each system.
DEMAND (level) CN3D*2 Adapter for external input (PAC- SC36NA-E) Performs a low level noise operation of the outdoor unit by an ex-
ternal input to the outdoor unit.
* It can be used as the silent operation device for each refrigerant system.
Low-noise mode (level) *3*4
Forces the outdoor unit to perform a fan operation by receiving sig-
nals from the snow sensor.*5*7 Snow sensor signal
input (level) CN3S Cooling/heating operation can be changed by an external input to
the outdoor unit. Auto-changeover CN3N
The operation mode of the unit can be changed from normal cool- ing operation (performance priority) to energy-saving cooling mode by an external signal input.
Energy-saving
mode CN3K
Out-put How to extract signals from the outdoor unit
*It can be used as an operation status display device.
*It can be used for an interlock operation with external devices.
Operation status of
the compressor*5 CN51 Adapter for external out- put(PAC- SC37SA-E) Error status*6*8
Low-noise mod is effective. Capacity priority mode becomes effective.
Cooling Heating Cooling Heating
TH7<30°C[86°F] and
63HS1<32kg/cm2 TH7>3°C[37°F] and
63LS>4.6kg/cm2 TH7>35°C[95°F] or
63HS1>35kg/cm2 TH7<0°C[32°F] or 63LS<3.9kg/cm2