Installation
EDUS39-605
31
Installation of Outdoor Units
7-1 Optional parts COOL/HEAT selector
S1S .......................... Selector switch (fan, cool/heat)
S2S .......................... Selector switch (cool/heat)
NOTE
•
Use copper conductors only.
•
When using the adaptor for sequential start, refer to Sec-
tion 7-4,
Examples
, on Page ____
•
For connection wiring to outdoor-outdoor transmission F1-
F2, outdoor-indoor transmission F1-F2, outdoor-multi
transmission Q1-Q2, refer to Section 7-4,
Examples
, on
Page ___
•
For connection wiring to the central remote controller, refer
to the installation manual of the central remote controller.
•
Use insulated wire for the power cord.
7-2 Power circuit and cable requirements
A power circuit (see table below) must be provided for
connection of the unit. This circuit must be protected with
the required safety devices, i.e. a main switch, a slow
blow fuse on each phase and a ground leak detector.
When using residual current operated circuit breakers, be
sure to use a high-speed type 200mA rated residual oper-
ating current.
NOTE
•
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 cords and branch wir-
ing are must be in compliance with local code.
7-3 General
•
Make sure to connect the power source wire to the power
source terminal block and to clamp it as shown in figure 14.
•
Never install a phase advancing capacitor
. This unit is
equipped with an inverter and installing a phase advancing
capacitor reduces the power factor improvement factor
and may cause the capacitor to overheat due to high-fre-
quency waves. Keep power imbalance within 2% of the
supply rating.
1.
Large imbalances shorten the life of the smoothing
capacitor.
2.
When power imbalances exceed 4% of the supply rat-
ing, the product halts operation as a protective measure,
and an error indicator is transmitted.
•
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, and therefore generates noise,
which must be reduced to avoid interfering with other
devices. The outer casing of the product may take on an
electrical charge due to leaked electrical current, which
then must be discharged with the grounding.
•
This unit uses an inverter so be sure to install a ground
leak detector that can handle higher harmonics to prevent
malfunctioning of the ground leak detector.
•
Ground leak detectors which are especially for protecting
ground-faults should be used in conjunction with main
switch or fuse for use with wiring.
DANGER
This unit has a negative phase protection circuit that
should only be operated after the unit wiring is connected.
Do not ground units to water pipes, telephone wires or
lightning rods because incomplete grounding could cause
a severe shock hazard resulting in severe injury or death,
and to gas pipes because a gas leak could result in an
explosion which could lead to severe injury or death.
7-4 Examples
System example Refer to _______
1.
Field power supply
2.
Main switch
3.
Ground leak detector
4.
Fuse
5.
COOL / HEAT selector
6.
Remote controller
power supply wiring
transmission wiring Wiring: 2-conductor, 18 AWG,
stranded, non-shielded copper cable / PVC or vinyl jacket
Field line connection
L1, L2, L3, phase of the power cord 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.
1.
Power supply
(208~230 V, Three-phase)
2.
Branch switch, overcurrent breaker
3.
Grounding wire
4.
Ground eakage 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
accessory clamps (1).
11.
Grounding wire
12.
When wiring, do not allow the ground wire to contact
the compressor 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
Models
Phase
and
frequency
Voltage
Recom-
mended
fuses
Transmission
line selection
RXYQ72/
96MTJU
φ
3, 60Hz
208-230V
60A
AWG 18
RXYQ144/
168/
192MTJU
φ
3, 60Hz
208-230V
60A + 60A
AWG 18
