Power Circuit And Cable Requirements; General; Examples - Panasonic CU-5MX1SPP Manual De Instalación

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 leak detector.
Phase and
frequency Voltage
CU-5MX1
3N~50 Hz 400V
CU-8MX1
3N~50 Hz 400V
CU-10MX1
3N~50 Hz 400V
NOTE Select the power supply cable in accordance with
relevant local and national regulations.

General

I Up to 3 units can be connected by crossover power source
wiring between outdoor units. However, units of smaller capacity
must be connected downstream. For details, refer to the
equipment design data and technical data.
Make sure to connect the power source wire to the power source
I
terminal block and to clamp it as shown in figure 3, chapter
"Field line connection (See figure 3)" on page 9.
As this unit is equipped with an inverter, installing a phase
I
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.
I
- 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.

Examples

System example
(See figure 5)
1 Field power supply
2 Main switch
3 Earth leak detector
4 Fuse
5 Cool/heat selector
6 Remote controller
Power supply wiring (sheathed cable)
Transmission wiring (sheathed cable)
Field line connection
(See figure 3)
1 Field power supply
2 Clamp the wire
3 Grounding screw
4 Spring washer
5 Flat washer
6 Earth wire
7 C cup washer
8 Transmission line
Wire clamp
9
CU-5~10MX1SPP
Urban Multi air conditioner
4PW12336-1C
Recom-
mended Transmission line
fuses section
2
20A
0.75~1.25 mm
2
32A
0.75~1.25 mm
2
40A
0.75~1.25 mm
Example of performing cool/heat with cool/heat selector
figure 8)
1 Cool/heat selector
2 Outdoor unit P.C. board (A1P)
Take care of the polarity
3
Use the conductor of sheathed wire (2 wire) (no polarity)
4
Terminal board (field supply)
5
6 Indoor unit
Example of performing cool/heat setting of two or more
outdoor units in block with cool/heat selector
For the wiring shown in figure 8, be sure to use 0.75-1.25 mm
I
vinyl cords with sheath or cables (two-core). (Three-core cables
can be used only for the cool/heat selector.)
The wires shown in figure 8 are field supply.
I
Be sure to follow the limits below. If the unit-to-unit
I
cables are beyond these limits, it may result in
malfunction of transmission.
Maximum wiring length: 1000 m
Total wiring length: 2000 m
Max. number of branches: 16
Up to 16 branches are possible for unit-to unit cabling.
I
No branching is allowed after branching.
1 Branch
2 Subbranching
1
F1 F2
Never connect the power supply to unit-to-unit cabling
I
terminal block. Otherwise the entire system may
break down.
Sequential start (not for CU-5MX1)
Make the outdoor unit cable connections shown below.
The outdoor unit PC board (A1P) is factory set at 'Sequential start
available'.
1
A1P
A B C F1 F2 F1 F2
1=Indoor unit
(See
2
F1 F2 F1 F2
F1 F2 F1 F2
1
A1P
A B C F1 F2 F1 F2
Installation manual
9
2