7
6.1.1. Indoor unit power supplied from outdoor unit
The following connection patterns are available.
The outdoor unit power supply patterns vary on models.
1 System
1:1 System
6. Electrical work
A
Outdoor unit power supply
B
Wiring circuit breaker or isolating switch
C
Outdoor unit
D
Indoor unit/outdoor unit connecting cords
E
Remote controller
F
Indoor unit
G
Indoor unit earth
* Af
fi
x a label A that is included with the manuals near each wiring diagram for the indoor and outdoor units.
Indoor unit model
PCA-A24,30
PCA-A36, 42
Minimum circuit ampacity
1A
2A
Maximum rating of overcurrent protective device
15A
Wiring
Wire No.
× size
Indoor unit-Outdoor unit
*1
3 × AWG16 (polar)
Indoor unit earth
1 × Min. AWG16
Remote controller-Indoor unit
*2
2 × AWG22 (Non-polar)
Circuit
rating
Indoor unit-Outdoor unit S1-S2
*3
AC 208/230 V
Indoor unit-Outdoor unit S2-S3
*3
DC24 V
Remote controller-Indoor unit
*3
DC12 V
*1. Max. 50 m, 165 ft
*2. The 10 m, 30 ft wire is attached in the remote controller accessory. Max. 500 m, 1500 ft
*3. The
fi
gures are NOT always against the ground.
S3 terminal has DC 24 V against S2 terminal. However between S3 and S1, these terminals are not electrically insulataed by the transformer or other device.
Notes: 1. Wiring size must comply with the applicable local and national code.
2. Use copper supply wires.
3. Use wires rated 600V or more for the power supply cables and the indoor unit/outdoor unit connecting cables.
4. Install an earth longer than other cables.
6.2. Remote controller
6.2.1. For wired remote controller
1) Installing procedures
(1) Select an installing position for the remote controller. (Fig. 6-2)
The temperature sensors are located on both remote controller and indoor unit.
►
Procure the following parts locally:
2 piece switch box
Thin copper conduit tube
Lock nuts and bushings
[Fig.6-2]
A
Remote controller pro
fi
le
B
Required clearances surrounding the remote controller
C
Installation pitch
(2) Seal the service entrance for the remote controller cord with putty to prevent
possible invasion of dew drops, water, cockroaches or worms. (Fig. 6-3)
A
For installation in the switch box
B
For direct installation on the wall, select one of the following:
• Prepare a hole through the wall to pass the remote controller cord (in order to run
the remote controller cord from the back), then seal the hole with putty.
• Run the remote controller cord through the cut-out upper case, then seal the cut-
out notch with putty.
B-1. To lead the remote controller cord from the back of the controller
B-2. To run the remote controller cord through the upper portion
[Fig.6-3]
C
Wall
E
Lock nut
G
Switch box
I
Seal with putty
D
Conduit
F
Bushing
H
Remote controller cord
J
Wood screw
2) Connecting procedures (Fig. 6-4)
1
Connect the remote controller cord to the terminal block.
A
To TB5 on the indoor unit
B
TB6 (No polarity)
3) 2 remote controllers setting
If 2 remote controllers are connected, set one to “Main” and the other to “Sub”. For
setting procedures, refer to “Function selection of remote controller” in the opera-
tion manual for the indoor unit.
S1
S2
L1
L2
GR
1
2
S1
S2
S3
S3
1-3/16
1-3/16
1-3/16
4-23/32
3-9/32
B-1.
B-2.
Fig. 6-3
Fig. 6-2
(inch)
1-37/64
B
TB
Fig. 6-4
A
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