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EDUS39-605
Crimp-style terminal
15.
Wire gauge: Small
16.
Wire gauge: Large
17.
Refer to figure 22.
Retain with accessory clamps (3).
1.
Electric wiring
2.
Wiring between units
3.
Retain to the electric parts box with the accessory
4.
clamps (1).
When routing the remote control cord and inter-unit
5.
wiring, secure clearance of 5" or more from the power
wiring. Ensure that the power wiring does not contact
any heated sections
(
).
Retain to the back of the column support with the
6.
accessory clamps (2).
Inter-unit wirings
7.
Power/ground wires
8.
Grounding wire
9.
When wiring, exercise sufficient caution not to detach
10.
the acoustic insulators from the compressor.
CAUTION
Precautions when laying power wiring〉
Use round pressure terminals for connections to the power
terminal block.
When none are available, follow the instructions below.
Do not connect wiring of different thicknesses to the
power terminal block as slack in the power wiring may
cause abnormal heat.)
When connecting wiring which is the same thickness,
use the following instructions:
Round pressure terminal
Connect same-
It is forbidden to
thickness wiring
connect two to
to both sides.
one side.
Use an appropriate screwdriver for tightening the termi-
nal screws. A screwdriver with a small head will strip the
head and make proper tightening impossible.
Over-tightening the terminal screws may break them.
See the table below for tightening torque for the terminal
screws.
Tightening torque (ft.Ibf)
M8 (Power terminal block)
M8 (Ground)
M3 (Inter-unit wiring terminal block)
Precautions when connecting the ground
When pulling the ground wire out, wire it so that it comes
through the cut out section of the cup washer. An improper
Installation of Outdoor Units
Power wire
It is forbidden to
connect wiring of
different thicknesses.
40.6-53.8
5.9-7.2
ground connection may prevent a good ground from being
achieved.
Round pressure terminal
WARNING
Use only specified wire and connect wires to terminals
tightly. Be careful that wires do not place external stress
on terminals. Keep wires in neat order so as to not to
obstruct other equipment. Incomplete connections could
result in overheating, and in worse cases, electric shock
or fire.
Field line connection: transmission wiring and cool/heat
selection
[In case of one outdoor unit]
Refer to figure 15.
COOL/HEAT selector
1.
Outdoor unit P.C. board (A1P)
2.
Take care of the polarity
3.
Use the conductor of sheathed wire (2 wire) (nopo-
4.
larity)
Terminal board (field supply)
5.
Indoor unit
6.
[In case of multiple outdoor unit]
Refer to figure 17.
Unit A (Master unit)
1.
Unit B (Slave unit)
2.
TO IN/D UNIT
3.
TO OUT/D UNIT
4.
TO MULTI UNIT
5.
To COOL/HEAT selector
6.
To indoor unit
7.
To other systems
8.
NOTE
Be sure to follow the limits below. If the transmission wir-
ing is beyond these limits, it may result in transmission
malfunction.
Maximum wiring length: 3280ft.
Total wiring length: 6560ft.
Max. branches No. of branches: 16
Max. number of outdoor units connectable: 10
Up to 16 branches are possible for transmission wiring.
No branching is allowed after branching.
Never connect the power supply to transmission wiring
terminal block or the entire system may break down.
Refer to figure 16.
Branch
1.
Sub-branching
2.
Installation
Cup washer
Cut out section
32

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