30
VG79D920H01
10-3. Control cable specifications
・
Transmission cable
Type
2-core shielded cable CVVS, CPEVS, or MVVS
Size
1.25 mm
2
(AWG 16), or ø1.2 mm or above
Length
Max. 200 m (656 ft)
Remarks
The maximum allowable length of transmission cables via outdoor units (indoor-outdoor transmission cables) is 500 m
(1640 ft).
The maximum allowable length of transmission cables from the power supply unit to each outdoor unit is 200 m (656 ft).
* Do not use a single multiple-core cable to connect indoor units that belong to different refrigerant systems. The use of a multiple-core cable
may result in signal transmission errors and malfunctions.
* Ensure shield continuity when extending the transmission cable.
10-4. System configuration
・
Unit code and the maximum number of connectable units
Two-outdoor-unit system
Unit type
Code
Number of connectable units
Outdoor unit
Main unit
OC
–
Sub unit
OS
–
Indoor unit
IC
1 to 10 units per OC
Single-outdoor-unit system
Unit type
Code
Number of connectable units
Outdoor unit
Main unit
OC
–
Indoor unit
IC
1 to 10 units per OC
* The outdoor units in the same refrigerant circuit are automatically designated as OC and OS. The outdoor units are designated as OC and OS
in the order of address from large to small.
* Do not connect the MA/ME remote controllers or the system controllers to the system.
・
System configuration example
* The numbers in the parentheses in the figures below indicate address numbers.
(M-NET)
A B S
(M-NET)
A B S
(M-NET)
A B S
(M-NET)
A B S
4
(1)
(2)
(3)
(4)
Ⓐ
Ⓐ
Shielded cable
*1 Daisy-chain terminals (TB3) on outdoor units together in the same refrigerant system.
*2 Leave the power jumper connected to CN41.
Maximum allowable length of control cables
Transmission cables
L
1
+ L
2
+ L
3
+ L
4
≤ 200 m (656 ft)