Installation manual
8
ERX125~250A7W1B
Inverter condensing unit
4PW30064-1D
.........................Terminal
..........................Protective earth (screw)
BLK ........................Black
BLU ........................Blue
BRN........................Brown
GRN .......................Green
GRY........................Grey
ORG .......................Orange
PNK........................Pink
RED........................Red
WHT .......................White
YLW........................Yellow
8.2.
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 an
earth leakage breaker.
When using residual current operated circuit breakers, be sure to use
a high-speed type 300 mA rated residual operating current.
Point for attention regarding quality of the public electric power
supply
This equipment complies with respectively:
■
EN/IEC 61000-3-11
(1)
provided that the system impedance Z
sys
is less than or equal to Z
max
and
■
EN/IEC 61000-3-12
(2)
provided that the short-circuit power S
sc
is greater than or equal to the minimum S
sc
value
at the interface point between the user's supply and the public
system. It is the responsibility of the installer or user of the equipment
to ensure, by consultation with the distribution network operator if
necessary, that the equipment is connected only to a supply with
respectively:
■
Z
sys
less than or equal to Z
max
and
■
S
sc
greater than or equal to the minimum S
sc
value.
Be sure to install a main switch for the complete system.
8.3.
General cautions
■
Make sure to connect the power source wire to the power
source terminal block and to clamp it as shown in
described in chapter
"8.6. Field line connection: power wiring"
■
For conditional connections, refer to the Technical Data.
■
As this unit is equipped with an inverter, installing a phase
advancing capacitor not only will deteriorate power factor
improvement effect, but also may cause capacitor abnormal
heating accident due to high-frequency waves. Therefore, never
install a phase advancing capacitor.
■
Keep power imbalance within 2% of the supply rating.
•
Large imbalance will shorten the life of the smoothing
capacitor.
•
As a protective measure, the product will stop operating and
an error indication will be made, when power imbalance
exceeds 4% of the supply rating.
■
Follow the "electrical wiring diagram" supplied with the unit when
carrying out any electrical wiring.
■
Only proceed with wiring work after all power is shut off.
■
Always ground wires. (In accordance with national regulations of
the pertinent country.)
■
Do not connect the ground wire to gas pipes, sewage pipes,
lightning rods, or telephone ground wires. This may cause
electric shock.
•
Combustion gas pipes: can explode or catch fire if there is a
gas leak.
•
Sewage pipes: no grounding effect is possible if hard plastic
piping is used.
•
Telephone ground wires and lightning rods: dangerous when
struck by lightning due to abnormal rise in electrical potential
in the grounding.
■
This unit uses an inverter, and therefore generates noise, which
will have to 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 will have to be discharged
with the grounding.
■
Be sure to install an earth leakage breaker. (One that can
handle high-frequency electrical noise.)
(This unit uses an inverter, which means that an earth leakage
breaker capable of handling high-frequency electrical noise
must be used in order to prevent malfunctioning of the earth
leakage breaker itself.)
■
Earth leakage breakers that are especially designed for
protecting ground-faults must be used in conjunction with main
switch and fuse for use with wiring.
■
Never connect the power supply in reversed phase.
The unit can not operate normally in reversed phase. If you
connect in reversed phase, replace two of the three phases.
■
This unit has a reverse phase detection circuit. (If it is activated,
only operate the unit after correcting the wiring.)
■
Power supply wires must be attached securely.
■
If the power supply has a missing or wrong N-phase, equipment
will break down.
NOTE
(1) This wiring diagram only applies to the outdoor unit.
(4) Refer to the installation manual for connection of
the F1-F2 transmission wiring and how to use
BS1~BS5 and DS1, DS2 switch.
(5) Do not operate the unit by short-circuiting
protection device S1PH, S2PH.
NOTE
■
Use copper conductors only.
■
For connection wiring to the central remote
controller, refer to the installation manual of the
central remote controller.
Phase and
frequency
Voltage
Minimum
circuit
ampere
Recommended
fuses
Transmission line
section
ERX125
3 N~50 Hz
400 V
11.9 A
16 A
0.75~1.25 mm
2
ERX200
3 N~50 Hz
400 V
18.5 A
25 A
0.75~1.25 mm
2
ERX250
3 N~50 Hz
400 V
21.6 A
25 A
0.75~1.25 mm
2
(1) European/International Technical Standard setting the limits for voltage changes,
voltage fluctuations and flicker in public low-voltage supply systems for equipment
with rated current
≤
75 A.
(2) European/International Technical Standard setting the limits for harmonic currents
produced by equipment connected to public low-voltage systems with input
current >16 A and
≤
75 A per phase.
Z
max
(
Ω
)
Minimum S
sc
value
ERX125
—
—
ERX200
—
1218 kVA
ERX250
0.27
928 kVA
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 cord and
branch wiring are in compliance with IEC60245.
■
WIRE TYPE H05VV(*)
*Only in protected pipes (use H07RN-F when
protected pipes are not used).
A main switch or other means for disconnection, having a
contact separation in all poles, must be incorporated in the
fixed wiring in accordance with relevant local and national
legislation.
