23
GB
11.3. Wiring transmission cables
1
Types of control cables
1. Wiring transmission cables
Types of transmission cables: Shielding wire CVVS, CPEVS or MVVS
Cable diameter: More than 1.25 mm
2
[AWG16]
Maximum wiring length: Within 200 m [656 ft]
Maximum length of transmission lines for centralized control and indoor/outdoor transmission lines (Maximum length via outdoor units): 500 m [1640 ft] MAX
The maximum length of the wiring between power supply unit for transmission lines (on the transmission lines for centralized control) and each outdoor unit and
system controller is 200 m [656 ft].
2. Remote control cables
M-NET Remote Controller
Kind of remote control cable
Sheathed 2-core cable (unshielded) CVV
Cable diameter
0.3 to 1.25 mm
2
[AWG 22 to 16]
(0.75 to 1.25 mm
2
[AWG 18 to 16])*
Remarks
When 10 m [32 ft] is exceeded, use cable
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transmission cables.
MA Remote Controller
Kind of remote control cable
Sheathed 2-core cable (unshielded) CVV
Cable diameter
0.3 to 1.25 mm
2
[AWG 22 to 16]
(0.75 to 1.25 mm
2
[AWG 18 to 16])*
Remarks
Within 200 m [656 ft]
*
Connected with simple remote controller.
2
Wiring examples
Controller name, symbol and allowable number of controllers.
Name
Code
Possible unit connections
Outdoor unit
Main unit
OC
– (*2)
Sub unit
OS
– (*2)
BC controller
Main unit
BC
One controller for one OC
Sub unit
BS
Zero, one or two controllers for one OC
Indoor unit
Indoor unit controller
IC
1 to 20 units per 1 OC (*1)
Remote controller
Remote controller (*1)
RC
2 units maximum per group (*3)
Other
Transmission booster unit
RP
0 to 2 units per 1 OC (*1)
*1 A transmission booster (RP) may be required depending on the number of connected indoor unit controllers.
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capacity is the same, they will be in ascending order of their address number.)
*3 When a PAR-30MAAU is connected to a group, no other MA remote controllers can be connected to the same group.
[Fig. 11.2.1]
Terminal block for indoor –
outdoor transmission line
(TB3)
Terminal block for
centralized control
(TB7)
Power supply terminal block
(TB1)
Control box
C
A
B
L1 L2 L3
A
Power
source
B
Transmission
line
C
Ground
screw
[Fig. 11.2.2]
A
B
C
A
Cable strap
B
Power source cable
C
Transmission cable
When using wire size AWG 14, AWG 12, or AWG 10, be sure to use
knockout hole 2.
When using wire size AWG 8 or AWG 6, be sure to use knockout hole 4.
When using wire size AWG 4, AWG 3, or AWG 2 be sure to use knockout
hole 3.
When using wire size AWG
3
/
0
, AWG
2
/
0
, or AWG 0, be sure to use knockout
hole 5.
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suitable material.
2
Conduit tube installation
Open by hammering the knockout holes for the conduit tube located on the
base and the bottom part of the front panel.
When installing the conduit tube directly through the knockout holes, remove
the burr and protect the tube with masking tape.
Use the conduit tube to narrow down the opening if there is a possibility of
small animals entering the unit.
When taking the conduit tube out from the bottom part of the unit, caulk
around the tube opening to prevent water penetration.
