Daikin brp069a42, Technical Data Manual

Page: 79 / 161

78 • Control systems
• intelligent Touch Manager • ED721208
NOTE
• What’s a remote controller group?
A single remote controller can simultaneously control a maximum of 16 indoor units. This capability
is referred to as group control. A remote controller group is a group of indoor units controlled under
the same remote controller.
[Conceptual drawing of a remote controller group]
F1, F2 P1, P2 F1, F2 P1, P2 F1, F2 P1, P2 F1, F2 P1, P2
A
A
Max. 16 units
Requirements that must be met
Cable specifications • Cable type: 2-core vinyl-insulated vinyl-sheathed cable/vinyl cabtyre cable or 2-core shielded cable
• Core thickness: 0.75mm² - 1.25mm²
• Terminal treatment: Use a round crimp-type terminal (M3) with insulating sleeve.
Precautions • Do not use multicore cables with three or more cores.
• When using a shielded cable, connect only one end of each steel wire to the ground.
• Keep the DIII-NET communication wiring at least 50 mm away from power supply wiring.
• The maximum wire distance must be kept to 1000 meters or less. The total wire length must be limited
to 2000 meters, except when using a shielded cable whose total wire length must be kept to 1500 meters
or less.
Precautions for using multiple centralized controllers
Equipment that controls multiple air conditioners is referred to as “centralized controller”. DAIKIN’s product portfolio includes a wide range
of centralized controllers suited to different applications or target sizes, which can be used in combination to construct an optimal air
conditioning system.
If two or more centralized controllers are used in combination in DIII-NET, you must establish a MASTER to SLAVE relationship among
those controllers to prevent confusion. The MASTER authority may be assigned to one controller only. The remaining controllers must be
set to SLAVE.
The iTM plus adaptor is set to MASTER by default. Change the setting to SLAVE in any of the following cases:
• Where Interface for use in BACnet is installed in parallel.
• Where Interface for use in LONWORKS is installed in parallel.
• Where there is another MASTER intelligent Touch Manager, or it is connected in relations of main/sub.
• Where there is another MASTER iTM plus adaptor, and it is connected in relations of main/sub.