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•
Connect the remote controller's transmission cable within 10 m using a 0.75 mm
core cable. If the distance is more than 10 m, use a 1.25 mm
[Fig. 9.2.1] (P.4) MA Remote controller
A Terminal block for indoor transmission cable
B Terminal block for outdoor transmission cable
C Remote controller
•
DC 9 to 13 V between 1 and 2 (MA remote controller)
[Fig. 9.2.2] (P.4) MA Remote controller
A Non-polarized
C Remote Controller
Caution:
Install wiring so that it is not tight and under tension. Wiring under tension
may break, or overheat and burn.
9.3. Connecting electrical connections
Please identify the model name of the operation manual attached on the terminal
bed box cover with that shown on the rating name plate.
1. Remove the screw (2pcs) holding the cover to dismount the cover.
[Fig. 9.3.1] (P.5)
A Screw holding cover (2pcs)
2. Open knockout holes
(Recommend to use a screwdriver or the like for this work.)
[Fig. 9.3.2] (P.5)
A Terminal bed box
C Remove
3. Fix power source wiring to terminal bed box by using buffer bushing for tensile
force. (PG connection or the like.) Connect transmission wiring to transmission
terminal bed through the knockout hole of terminal bed box using ordinary
bushing.
Connect the power source, Earth, transmission and remote controller wiring.
The dismounting of the terminal bed box is not needed.
[Fig. 9.3.3] (P.5)
E Use PG bushing to keep the weight of the cable and external force from being
applied to the power supply terminal connector. Use a cable tie to secure the
cable.
Wind the wire around the cable strap once to keep it from being pulled out.
F Power source wiring
H Use ordinary bushing
J Terminal bed for indoor transmission
K Terminal bed for remote controller
M Transmission line DC 30 V
N Terminal bed for outdoor transmission line (TB3)
O Transmission line to the remote controller
[Shield wire connection]
[Fig. 9.3.4] (P.5)
A Terminal bed
C Shield wire
D Insulation tape (To keep the earth wire of the shielded cable from coming in con-
tact with the transmission terminal)
5. After wiring is complete, make sure again that there is no slack on the connec-
tions, and attach the cover onto the terminal bed box in the reverse order of
removal.
Notes:
•
Do not pinch the cables or wires when attaching the terminal bed box
cover. Doing so may cause a risk of disconnection.
•
When accommodating the terminal bed box, make sure that the connec-
tors on the box side are not removed. If removed, it cannot operate nor-
mally.
2
2
junction cable.
B TB15
D TB5
B Cover
B Knockout hole
G Tensile force
I Power source terminal bed
L To 1-phase power source
B Round terminal
9.4. External I/O specifications
Caution:
1. Wiring should be covered by insulation tube with supplementary insula-
tion.
2. Use relays or switches with IEC or equivalent standard.
3. The electric strength between accessible parts and control circuit should
have 2750 V or more.
9.5. Selecting the external static pressure
As the factory setting is for use under an external static pressure of 150 Pa, no
switch operation is needed when using under the standard condition.
External static pressure
60 Pa
75 Pa
100 Pa
150 Pa
9.6. Setting addresses
(Be sure to operate with the main power turned OFF.)
•
There are two 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 "1", remain SW12 (for over 10) at "0", and match
SW11(for 1 to 9) with "1".
•
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.
9.7. Sensing room temperature with the
built-in sensor in a remote controller
If you want to sense room temperature with the built-in sensor in a remote control-
ler, 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 flow at a time when the heating
thermometer is OFF.
Note:
•
To perform the auto cooling/heating operation, use the built-in sensor in
a remote controller or the optional remote sensor.
Switch operation
SWA
SWC
2
3
2
1
1
SWA
SWC
2
3
2
1
1
SWA
SWC
2
3
2
1
1
SWA
SWC
2
3
2
1
1
11
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