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16
7-4 Examples
System example (Refer to figure 13)
1.
Field power supply
2.
Main switch
3.
Earth leak detector
4.
Fuse
5.
COOL / HEAT selector
6.
Remote controller
7.
Outdoor unit
8.
BS unit
9.
Indoor unit
power supply wiring (sheathed cable)
transmission wiring (sheathed cable)
Field line connection
L1, L2, L3, phase of the power supply wiring should be clamped to the
safety catch using the included clamp material.
The green and yellow striped wrapped wires should be used for ground-
ing.
(Refer to figure 14)
1.
Power supply
(208~230 V, Three-phase)
2.
Branch switch, overcurrent breaker
3.
Grounding wire
4.
Earth leakage breaker
5.
Section A
6.
Attach insulation sleeves.
7.
Power supply terminal block
8.
Grounding terminal
9.
Retain the ground wire along with the power supply wiring using
the accessory clamps (1).
10.
Retain the power supply wiring to the bracket using the acces-
sory clamps (1).
11.
Grounding wire
12.
When wiring, do not allow the ground wire to contact the com-
pressor lead wires. If the wire contacts each other, adverse
effects may occur to other units.
13.
When connecting two wires to one terminal, ensure that the
crimp-style terminals face with each other back to back.
Moreover, make sure that the wire of the smaller gauge is
located above.
14.
Terminal block
15.
Crimp-style terminal
16.
Wire gauge: Small
17.
Wire gauge: Large
(Refer to figure 20)
1.
Retain with accessory clamp (3).
2.
Electric wiring
3.
Wiring between units
4.
Retain to the electric parts box with the accessory clamps (1).
5.
When routing the remote control cord and inter-unit wiring,
secure clearance of 5” or more from the power wiring. Ensure
that the power wiring does not contact any heated sections
(
).
6.
Retain to the back of the column support with the accessory
clamp (2).
7.
Inter-unit wirings
8.
Power/ground wires
9.
Grounging wire
10.
When wiring, exercise sufficient caution not to detach 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 is available, follow the instructions below.
•
Do not connect wiring of different thicknesses to the power
terminal block. (Slack in the power wiring may cause abnormal
heat.)
•
When connecting wiring which is the same thickness, do as
shown in the figure below.
•
For wiring, use the designated power wire and connect firmly,
then secure to prevent outside pressure being exerted on the ter-
minal board.
•
Use an appropriate screwdriver for tightening the terminal
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.
〈〈〈〈
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 ground connection
may prevent a good ground from being achieved.)
Field line connection: transmission wiring
[In case of one outdoor unit]
(Refer to figure 15)
1.
Outdoor unit
2.
Outdoor unit P.C. board (A1P)
3.
BS unit A
4.
BS unit B
5.
Last BS unit
6.
Indoor unit
7.
Remote controller
8.
Cool-only unit
9.
Use the conductor of sheathed wire (2 wire) (no polarity)
[In case of multiple outdoor units]
(Refer to figure 17)
1.
Unit A (Master unit)
2.
Unit B
3.
TO IN/D UNIT
4.
TO OUT/D UNIT
5.
TO MULTI UNIT
6.
To indoor unit
7.
To other systems
Tightening torque (ft.Ibf)
M8 (Power terminal block)
4.06-5.38
M8 (Ground)
M3 (Inter-unit wiring terminal block)
0.59-0.72
Connect same-
thickness wiring
to both sides.
Power wire
Round pressure terminal
It is forbidden to
connect two to
one side.
It is forbidden to
connect wiring of
different thicknesses.
Round pressure terminal
Cup washer
Cut out section
01_EN_3P114261-10Y.fm Page 16 Thursday, June 16, 2005 3:14 PM