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How to wiring
CAUTION
<Basic wiring diagram>
Central
controller
1-1
When
connecting to
MMY outdoor
units
MM : Super Modular Multi Indoor Unit model name.
(MMU, MMD, MMC, MML, MMK and MMF)
8
Ensure that wiring connections are correct. (Incorrect wiring will
damage the equipment.)
How to wire the central controller
In order to ensure safety, turn off the air conditioner power before mounting or
removing the central controller.
•
Connect the communication wires to the indoor/outdoor unit connecting
wires or central control system wires.
•
Use the following as the communication wires.
Total wire length of less than 1,000 meters: MVVS1.25mm
Total wire length of less than 2,000 meters: MVVS2.0mm
The total wire length is obtained by adding the lengths of the indoor/outdoor
unit connecting wires to the lengths of the central control system wires.
•
Do not run the communication wires inside the same electrical wire conduits
as the power cables, connect them using similar wires or allow them to be
routed near other wires.
•
For the communication wires, use signal wires that visually identify them as
being different from either the remote controller wires or the power cables.
•
Connect the power cable of the central controller to the AC220–240V power
source. (Incorrect wiring will damage the equipment.)
•
Connect the wires in such a way that none of the wires will be connected
incorrectly. (Incorrect wiring will damage the equipment.)
Connect the communication wires of the air conditioners shown which is the
wiring employed when using central control is used.
•
The maximum number of air conditioners which can be connected in one
central control system is 64 indoor units and 16 outdoor units (center units).
(With Super Modular Multi system)
•
Up to ten central controllers including other central control units can be
connected.
Refrigerant
system 1
(MMY)
Central control system wire
1-2
1-3
2-1
•
When connecting to MMY outdoor units, make the connection to the
NOTE
central control system wires (U3 and U4 terminals).
•
When connecting to MM
outdoor unit connecting wire (U1 and U2 terminals).
•
When connecting to a RAV air conditioner, make the connection to the U3
and U4 terminals of the TCC-LINK.
•
The TCC-LINK adapter is required for the RAV air conditioner. (except
KRT series.)
•
A general-purpose unit control interface is required with some air
conditioner models.
Refrigerant
system 2
(MMY)
Indoor/outdoor unit
connecting wire
2-2
2-3
When connecting to
MM
indoor units, make the connection to the indoor/
2
2
Refrigerant
system 3 (RAV)
TCC-LINK
adapter
3-1
When connecting a central
controller for RAV series
indoor units
indoor unit (except KRT),
add the TCC-LINK adapter
on indoor unit.
Central
controller
Fig. 5
OI-607-08EG
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