15
GB
D
F
E
I
NL
P
GR
RU
TR
CZ
SV
SL
HG
PO
*1: If TB7 on the outdoor unit in the same refrigerant system is not daisy-
chained, connect the transmission line for centralized control to TB7 on the
OC (*2). If the OC is out of order, or if the centralized control is being
conducted during the power supply shut-off, daisy-chain TB7 on the OC,
OS1 and OS2. (In the case that the outdoor unit whose power supply con-
nector CN41 on the control board has been replaced with CN40 is out of
order or the power is shut-off, centralized control will not be conducted
even when TB7 is daisy-chained.)
*2: OC, OS1 and OS2 of the outdoor units in the same refrigerant system are
automatically identified. They are identified as OC, OS1 and OS2 in
descending order of capacity. (If the capacity is the same, they will be in
ascending order of their address number.)
4. In the case of indoor-outdoor transmission line, connect the shield ground to
the ground terminal
. In the case of transmission lines for centralized con-
trol, connect it to the shield terminal (S) on the terminal block for centralized
control (TB7). Furthermore, in the case of the outdoor units whose power
supply connector CN41 is replaced with CN40, short circuit the shield terminal
(S) and the ground terminal
in addition to the above.
5. Fix the connected wires securely in place with the cable strap at the bottom of
the terminal block. External force applied to the terminal block may damage it
and may cause a short circuit, ground fault, or a fire.
[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
1
2
3
4 5
A
Cable strap
B
Power source line
C
Transmission line
•
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.
•
If there are any gaps around the wires, please be sure to fill these in with a
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.
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
[AWG 16]
•
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 [1,640 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
Cable diameter
Remarks
Sheathed 2-core cable (unshielded) CVV
0.3 to 1.25 mm
2
[AWG 22 to 16]
(0.75 to
1.25 mm
2
[AWG 18 to 16])*
When 10 m [32 ft] is exceeded, use cable with
the same specifications as 1. Wiring transmis-
sion cables.
*
Connected with simple remote controller.
Kind of remote control cable
Cable diameter
Remarks
Sheathed 2-core cable (unshielded) CVV
0.3 to 1.25 mm
2
[AWG 22 to 16]
(0.75 to
1.25 mm
2
[AWG 18 to 16]
)*
Within 200 m
[656 ft]
•
MA Remote Controller
2
Wiring examples
•
Controller name, symbol and allowable number of controllers.
Name
Code
Possible unit connections
Outdoor unit
Indoor unit
Remote controller
Other
Main unit
Sub unit
Indoor unit controller
Remote controller (*1)
Transmission booster unit
– (*2)
– (*2)
1 to 26 units per 1 OC (*1)
2 units maximum per group
0 to 1 unit per 1 OC (*1)
OC
OS1, OS2
IC
RC
RP
*1 A transmission booster (RP) may be required depending on the number of connected indoor unit controllers.
*2 OC, OS1 and OS2 of the outdoor units in the same refrigerant system are automatically identified. They are identified as OC, OS1 and OS2 in descending order of
capacity. (If the capacity is the same, they will be in ascending order of their address number.)
