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Installation
NOTE
When using residual current operated circuit breakers, be
sure to use a high-speed type 200mA rated residual oper-
ating current.
Select the power supply cable in accordance with relevant
local and national regulations.
Wire size must comply with the applicable local and
national code.
Specifications for local wiring power cord and branch wiring
must be compliance with local code.
10.2 General
Make sure to connect the power supply wire to the power
supply terminal block and to clamp it as shown in, under
Field Line Connection.
As this unit is equipped with an inverter, installing a phase-
advancing capacitor not only reduces the power improve-
ment factor, but may also cause the capacitor to overheat
due to high-frequency waves. Never install a phase-
advancing capacitor.
Keep power imbalance within 2% of the supply rating.
1. High imbalances will shorten the life of the smoothing
capacitor.
2. As a protective measure, the product stops operating
and an error indication is made when a power imbal-
ance exceeds 4% of the supply rating.
Follow the Electrical Wiring Diagram. when carrying out
any electrical wiring.
Only proceed with wiring work after blocking off all power.
Always ground wires in accordance with national regula-
tions of the pertinent country.
This unit uses an inverter that generates noise which must
be reduced to prevent interference with other devices. The
outer casing of the product may take on an electrical
charge due to leaked electrical current, which must be dis-
charged with the grounding.
Be sure to install a ground leak detector capapable of han-
dling higher harmonics in order to prevent malfuncitoning of
the ground leak detector.
Use a ground leak detector especially for protecting
ground-faults in conjunction with main switch or fuse for
use with wiring.
This unit has a negative phase protection circuit that should
only be operated after correcting the wiring.
DANGER
Do not ground units to water pipes, telephone wires,
or lightning rods because lighting strikes incomplete
grounding can cause a severe shock hazard result-
ing in severe injury or death.
• Do not ground units to gas pipes because a gas leak can
result in an explosion which can lead to severe injury or
death.
Examples
System example (Refer to figure 13, page 38).
Field power supply
1.
Main switch
2.
Earth leak detector
3.
53
Fuse
4.
COOL / HEAT selector
5.
Remote controller
6.
Outdoor unit
7.
BS unit
8.
Indoor unit
9.
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 grounding.
(Refer to figure 14, page 38.)
Power supply
1.
(208~230 V, Three-phase)
Branch switch, overcurrent breaker
2.
Grounding wire
3.
Earth leakage breaker
4.
Section A
5.
Attach insulation sleeves.
6.
Power supply terminal block
7.
Grounding terminal
8.
Retain the ground wire along with the power supply
9.
wiring using the accessory clamps (1).
Retain the power supply wiring to the bracket using the
10.
accessory clamps (1).
Grounding wire
11.
When wiring, do not allow the ground wire to contact
12.
the compressor lead wires. If the wire contacts each
other, adverse effects may occur to other units.
When connecting two wires to one terminal, ensure
13.
that the crimp-style terminals face back to back and
that the wire of the smaller gauge is located above.
Terminal block
14.
Crimp-style terminal
15.
Wire gauge: Small
16.
Wire gauge: Large
17.
(Refer to figure 20, page 39.)
Retain with accessory clamp (3).
Electric wiring
18.
Wiring between units
19.
Retain to the electric parts box with the accessory
20.
clamps (1).
When routing the remote controller cord and inter-unit
21.
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
22.
accessory clamp (2).
Inter-unit wirings
23.
Power/ground wires
24.
Grounging wire
25.
When wiring, exercise sufficient caution not to detach
26.
the acoustic insulators from the compressor.
EDUS39-605
Installation of Outdoor Units

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