9
Example of a group operation system with multiple outdoor units (Shielding wires and address setting are
necessary.)
<Examples of Transmission Cable Wiring>
■
M-NET Remote Controller (Fig. 6-2)
■
MA Remote Controller (Fig. 6-3)
<Wiring Method and Address Settings>
a. Always use shielded wire when making connections between the outdoor unit (OC) and the indoor unit (IC), as well for all OC-OC, and IC-IC wiring intervals.
b. Use feed wiring to connect terminals M1 and M2 and the ground terminal on the transmission cable terminal block (TB3) of each outdoor unit (OC) to terminals M1, M2
and terminal S on the transmission cable block of the indoor unit (IC).
c.
Connect terminals 1 (M1) and 2 (M2) on the transmission cable terminal block of the indoor unit (IC) that has the most recent address within the same group to the
terminal block on the remote controller (RC).
d. Connect together terminals M1, M2 and terminal S on the terminal block for central control (TB7) for the outdoor unit (OC).
e. The jumper connector CN41 on the control panel does not change.
f.
Connect the terminal S on the terminal block for central control for the power supply unit to the ground terminal
in the electrical component box.
g. Set the address setting switch as follows.
Unit
Range
Setting Method
IC (Main)
01 to 50
Use the most recent address within the same group of indoor units
IC (Sub)
01 to 50
Use an address, other than that of the IC (Main) from among the units within the same group of indoor units. This must be
in sequence with the IC (Main)
Outdoor Unit
51 to 100
Use the most recent address of all the indoor units plus 50
* The address automatically becomes “100” if it is set as “01 - 50”.
M-NET R/C (Main)
101 to 150
Set at an IC (Main) address within the same group plus 100
M-NET R/C (Sub)
151 to 200
Set at an IC (Main) address within the same group plus 150
MA R/C
–
Unnecessary address setting (Necessary main/sub setting)
h. The group setting operations among the multiple indoor units is done by the remote controller (RC) after the electrical power has been turned on.
<Permissible Lengths>
1
M-NET Remote controller
•
Max length via outdoor units: L
1
+L
2
+L
3
+L
4
and L
1
+L
2
+L
3
+L
5
and L
1
+L
2
+L
6
+L
7
=
500 m (1.25 mm
2
or more)
•
Max transmission cable length: L
1
and L
3
+L
4
and L
3
+L
5
and L
6
and L
2
+L
6
and L
7
=
200 m (1.25 mm
2
or more)
•
Remote controller cable length:
r
1
,
r
2
,
r
2
+
r
3
,
r
4
=
10 m (0.5 to 1.25 mm
2
)
If the length exceeds 10 m, use a 1.25 mm
2
shielded wire. The length of this section (L
8
) should be included in the calculation of the
maximum length and overall length.
2
MA Remote controller
•
Max length via outdoor unit (M-NET cable): L
1
+L
2
+L
3
+L
4
and L
1
+L
2
+L
6
+L
7
=
500 m (1.25 mm
2
or more)
•
Max transmission cable length (M-NET cable): L
1
and L
3
+L
4
and L
6
and L
2
+L
6
and L
7
=
200 m (1.25 mm
2
or more)
•
Remote controller cable length:
c
1
and
c
1
+
c
2
+
c
3
and
c
1
+
c
2
+
c
3
+
c
4
=
200 m (0.3 to 1.25 mm
2
)
6. Electrical work
■
MA Remote Controller
Fig. 6-2
Fig. 6-3
A
: Group 1
B
: Group 3
C
: Group 5
D
: Shielded Wire
E
: Sub Remote Controller
( ): Address
■
M-NET Remote Controller
A
B
C
E
D
M1M2 S
M1
M2 S
TB7
TB3
IC
(51)
M1
M2 S
TB5
RC
(01)
IC
M1
M2 S
TB5
(03)
IC
M1
M2 S
TB5
(02)
IC
M1
M2 S
TB5
(04)
IC
M1
M2 S
TB5
(05)
IC
M1
M2 S
TB5
(07)
IC
M1
M2 S
TB5
(06)
L
2
L
1
(101)
RC
(105)
RC
(104)
RC
(155)
OC
M1
M2 S
TB7
(53)
OC
r
3
M1M2 S
Power Supply
Unit
M1M2 S
G-50A
L
3
L
6
L
7
L
4
L
5
r
2
r
4
r
1
A B
A B
A B
A B
M1M2 S
TB3
A
B
C
E
D
M1
M2 S
TB7
IC
(51)
M1
M2
1 2
S
TB5
TB15
1 2
TB15
1 2
TB15
1 2
TB15
1 2
TB15
1 2
TB15
1 2
TB15
MA
(01)
IC
M1
M2 S
TB5
(03)
IC
M1
M2 S
TB5
(02)
IC
M1
M2 S
TB5
(04)
IC
M1
M2 S
TB5
(05)
IC
M1
M2 S
TB5
(07)
IC
M1
M2 S
TB5
(06)
L
2
L
1
MA
MA
MA
OC
M1
M2 S
TB7
(53)
OC
c
1
c
4
c
3
S
Power Supply
Unit
S
G-50A
L
3
L
6
L
7
L
4
c
3
A B
A B
A B
M1M2
M1M2
c
1
c
1
c
2
c
2
A B
M1M2 S
TB3
M1M2 S
TB3