9
5.4. Types of control cables
1. Wiring transmission cables
Types of transmission cable
Shielding wire CVVS or CPEVS
Cable diameter
More than 1.25 mm
2
(AWG16)
Length
Less than 200m (656ft)
2. M-NET Remote control cables
Types of remote control cable Shielding wire MVVS
Cable diameter
0.5 (AWG 20) to 1.25 mm
2
(AWG16)
Length
Add any portion in excess of 10m (33ft) to
within the longest allowable transmission cable
length 200m (656ft)
3. MA Remote control cables
Types of remote control cable 2-core cable (unshielded)
Cable diameter
0.3 (AWG22) to 1.25 mm
2
(AWG16)
Length
Less than 200m (656ft)
5.3. Connecting remote controller, indoor and outdoor
transmission cables (Fig. 5-3)
• Connect indoor unit TB5 and outdoor unit TB3. (Non-polarized 2-wire) The “S”
on indoor unit TB5 is a shielding wire connection. For speci
fi
cations about the
connecting cables, refer to the outdoor unit installation manual.
• Install a remote controller following the manual supplied with the remote
controller.
• Connect the remote controller’s transmission cable within 10 m, 33 ft using a 0.75
mm
2
(AWG22) core cable. If the distance is more than 10 m, 33 ft, use a 1.25
mm
2
(AWG16) junction cable.
1
MA Remote controller
• Connect the “1” and “2” on indoor unit TB15 to a MA remote controller. (Non-
polarized 2-wire)
• DC 9 to 13 V between 1 and 2 (MA remote controller)
2
M-NET Remote controller
• Connect the “M1” and “M2” on indoor unit TB5 to a M-NET remote controller.
(Nonpolarized 2-wire)
• DC 24 to 30 V between M1 and M2 (M-NET remote controller)
3
Wireless remote controller(When installing wireless signal receiver)
• Connect the wire of wireless signal receiver (9-pole cable) to CN90 of indoor con-
troller board.
• When more than two units are run under group control using wireless remote
controller, connect TB15 each with the same number.
• To change Pair No. setting, refer to installation manual attached to wireless re-
mote controller. (In the default setting of indoor unit and wireless remote control-
ler, Pair No. is 0.)
A
Terminal block for indoor transmission cable
B
Terminal block for outdoor transmission cable(M1(A), M2(B),
(S))
C
Remote controller
D
Wireless signal receiver
E
Wireless remote controller
A
A
C
TB5
TB15 TB5
TB15
S
M1 M2
S
M1 M2
B
TB3
M1 M2
2
1
C
2
1
A
A
C
TB5
TB5
S
M1 M2
S
M1 M2
C
B
TB3
M1 M2
1
2
Fig. 5-3
3
5. Electrical work
SW14
SW11
SW12
1 2 3 4 5 6 7 8 9 10
ON
OFF
SW1
SWC
CN82
CN43
0 1
2
3
4
5
6
7
8
9
0 1
2
3
4
5
6
7
8
9
0 12
3
4
5
67
89
AB
C
D
EF
(10ths DIGIT)
(1s DIGIT)
. /
.
(BRANCH No.)
SW5
220V
(208V)
240V
(230V)
5.5. Setting addresses (Fig. 5-4)
(Be sure to operate with the main power turned OFF.)
• There are 2 types of rotary switch setting available: setting addresses 1 to 9 and
over 10, and setting branch numbers.
1
How to set addresses
Example: If Address is “3”, remain SW12 (for over 10) at “0”, and match SW11 (for
1 to 9) with “3”.
2
How to set branch numbers SW14 (Series R2 only)
Match the indoor unit’s refrigerant pipe with the BC controller’s end connection
number.
Remain other than series R2 at “0”.
• The rotary switches are all set to “0” when shipped from the factory. These
switches can be used to set unit addresses and branch numbers at will.
• The determination of indoor unit addresses varies with the system at site. Set
them referring to the Data Book.
A
Address board
Note:
Please set the switch SW5 according to the power supply voltage.
• Set SW5 to 230V side when the power supply is 230V.
• When the power supply is 208V, set SW5 to 208V side.
5.6. Sensing room temperature with the built-in sensor
in a remote controller (Fig. 5-4)
If you want to sense room temperature with the built-in sensor in a remote
controller, set SW1-1 on the control board to “ON”. The setting of SW1-7 and
SW1-8 as necessary also makes it possible to adjust the air
fl
ow at a time when
the heating thermometer is OFF.
Fig. 5-4
