Mitsubishi Electric PAC-YT51CRA Manuel D'installation page 2

NOTE: If you need to use a cable extension longer than 10 m (32 ft), select an electric wire that meets the following specifications:
Wire specification VCTF or CVV (2-core): 1.25 mm
(2) The switch box is necessary for mounting. Use the switch box specified in the right.
3 How To Wire Transmission Line
The wiring is different when the remote controller is connected to a CITY MULTI control system ("-A" type and later) and when it is connected to a Mr.
SLIM air conditioner (A control type). The wiring also differs with the system configuration. Check the system used.
1. Connecting to CITY MULTI control system
The numbers (1) to (4) in the figure correspond to items (1) to (4) in the following description.
Address=51
Address=55
f
g
(1) Wiring from the remote controller
• Connect to the MA remote controller terminal block (TB15) on the indoor unit.
• The terminal block has no polarity. Continue to the terminal block at the rear bottom of the remote controller.
(2) Operating in a group (Groups 03, and 04 above)
• Interconnect the MA remote controller terminal block (TB5) of the indoor units you want to operate as a group, and connect the MA remote
controller to that point.
• When also it in combination with a CITY MULTI control system as shown in the figure above, group setting at the system controller (central
controller in the figure above) is necessary.
(3) Number of connectable remote controllers (groups 02 and 04)
• A main remote controller and one sub remote controller, a total of two, can be connected to a group made up of indoor units.
(4) To interlock to a LOSSNAY or OA processing unit, make the following settings using the remote controller. (For a description of how to set an
interlock, see section 6 Ventilation Setting .)
Set the LOSSNAY or OA processing unit address and the address of all the indoor units you want to interlock.
(5) Total length of remote controller wiring
• The simple MA controller can be wired up to 200 m (656 ft). Procure 0.75 - 1.25 mm
CAUTION Remote controllers cannot be wired together. Only one wire can be connected to the remote controller terminal block.
NOTE: When interlocking the MA remote controller with a LOSSNAY or OA processing unit, always set the address of all the indoor units in the
group and the address of the LOSSNAY or OA processing unit.
2. Connecting to Mr. SLIM air conditioner
The remote controller wiring depends on the system configuration. Check the system configuration. Wire the remote controller as shown in the
example below.
The numbers (1) to (3) in the figure correspond to items (1) to (3) in the following description.
[1] Connecting the remote controller for each refrigerant system (Standard 1:1, simultaneous twin, simultaneous triple, simultaneous four, indi-
vidual twin)
Simultaneous twin
Refrigerant
a
address=00
TB1
TB4
b
TB5
(1)
(3)
d
[2] When grouping by different refrigerant systems
Standard 1:1
Refrigerant
a
address=00
(Master)
TB1
TB4
b
TB5
(1)
(3)
d
* Set the refrigerant address using the outdoor unit dip switches. (For more information, refer to the outdoor unit installation manual.)
* All the indoor units enclosed in
(1) Wiring from remote controller
• Connect to indoor unit TB5 (remote controller terminal block). (The terminal block has no polarity.)
• For simultaneous multi type, when mixing various types of indoor units, always connect the remote controller to the indoor unit with the
most functions (wind velocity, vane, louver, etc.).
2
Group01 Group02
a
Address=01 Address=02
TB7 TB3
b b
TB5 TB15 TB5 TB15
(1)
(1)
d d
(3) (3)
a
Address=08 Address=07
TB7 TB3
b b
TB5 TB15 TB5 TB15
(1)
(1)
d e
(3)
Group04
Simultaneous twin
Refrigerant
a
address=00
TB1
TB4 TB4
b b
TB5
(1)
(3) (3)
d e
Simultaneous twin Simultaneous triple
Refrigerant address=02
Refrigerant address=01
a a
(Subordinate)
(Subordinate)
TB1 TB1
TB4 TB4 TB4
b b b
(2) TB5 (2) TB5
(1)
(3)
e
are controlled as one group.
(stranded 16 AWG) or equivalent
Group03
Address=03 Address=04 Address=09
b b c
TB5 TB15 TB5 TB15 TB5 TB15
(1)
(2)
e d
(2)
(3)
Address=06 Address=05
b b
TB5 TB15 TB5 TB15
(2)
2
(stranded 16 - 28 AWG), 2-core cable at the installation site.
Individual twin
Refrigerant
Refrigerant
a
address=00
address=00
TB1 TB1
TB4 TB4 TB4
b b
TB5 TB5
(1)
(3)
d
Individual twin
Refrigerant
address=03 a
(Subordinate)
TB1 TB1
TB4 TB4
TB4
b b b
(2) TB5
(4)
Connect to
TB15 on the
indoor unit.
a Outdoor unit
b Indoor unit
c LOSSNAY or OA processing unit
d Main Remote Controller
e Sub Remote Controller
f Central controller
g Power supply unit for transmission line
Connect to
TB5 on the
indoor unit.
b
(1)
(3) (3)
d e
Refrigerant
address=04
(Subordinate)
a Outdoor unit
b Indoor unit
TB4
b d Main Remote Controller
(Simple MA Controller)
(2) TB5
e Sub remote controller
(Simple MA Controller)
d e
2