Field Line Connection: Power Wiring - Panasonic Urban Multi U-8ME4XPQ Manual De Instalación

Outside unit
Be sure to follow the limits below. If the unit-to-unit
cables are beyond these limits, it may result in
malfunction of transmission.
- Maximum wiring length:
- Total wiring length:
- Maximum number of branches:
Maximum number of independent interconnectable
systems (TO OUT/D UNIT F1-F2)
Up to 16 branches are possible for unit-to unit cabling.
No branching is allowed after branching.
(See figure 20)
1 Outdoor unit
2 Indoor unit
3 Main line
4 Branch line 1
5 No branch is allowed after branch
6 Transmission wiring between outdoor unit and indoor
unit(s)
Never connect the power supply to transmission
wiring terminal block. Otherwise the entire system
may break down.
Never connect 400 V to the terminal block of the
interconnecting wiring. Doing so will break the entire
system.
- The wiring from the indoor units must be
connected to the F1/F2 (In-Out) terminals on the
PC board in the outdoor unit.
- After installing the interconnecting wires inside the
unit, wrap them along with the on-site refrigerant
pipes using finishing tape, as shown in figure 13.
1 Liquid pipe
2 High pressure/low pressure gas pipe
3 Finishing tape
4 Suction gas pipe
5 Transmission wiring
6 Insulation material
For the above wiring, always use vinyl cords with 0.75
2
to 1.25 mm sheath or cables (2-core wires).
Be sure to keep the power line and transmission line
apart from each other.
Be careful about polarity of the transmission line.
Make sure that the transmission line is clamped as
shown in figure 19.
Check that wiring lines do not make contact with
refrigerant piping.
Firmly close the lid and arrange the electrical wires as
to prevent the lid or other parts from coming loose.
When you do not use a wire conduit, be sure to
protect the wires with vinyl tubes etc, to prevent the
edge of the knock-out hole from cutting the wires.
U-8~16ME4XPQ
Urban Multi air conditioner
4PW40726-1A
8.8.
The power cord must be clamped to the plastic bracket using field
supplied clamp material.
The green and yellow striped wrapped wires must be used for
1000 m
grounding. (See figure 24)
2000 m
1
16
2
3
: 10.
4
5
6
7
8
9
10
11
12
13

Field line connection: power wiring

Power supply (380~415 V, 3 N~50 Hz)
Earth leakage breaker
Fuse
Grounding wire
Power supply terminal block
Connect each power wire
RED to L1, WHT to L2, BLK to L3 and BLU to N
Ground wire (GRN/YLW)
Clamp the power wire to the plastic bracket using a field supplied
clamp to prevent external force being applied to the terminal.
Clamp (field supply)
Cup washer
When connecting the earth wire, it is recommended to perform
curling.
Electric component box (1)
Electric component box (2)
It is not required to open electric component box (2) for
installation.
When routing ground wires, secure clearance of
50 mm or more away from compressor lead wires.
Failure to observe this instruction properly may
adversely effect correct operation of other units
connected to the same ground.
When connecting the power supply cord, the earth
connection must be made before the current-carrying
connections are established. When disconnecting the
power supply cord, the current-carrying connections
must be separated before the earth connection is. The
length of the conductors between the power supply
cord anchorage and the terminal block itself must be
such that the current-carrying conductors are
tautened before the earthing conductor is in case the
power supply cord is pulled loose from the cord
anchorage.
Precautions when laying power wiring
For wiring, use the designated power wire and
connect firmly, then secure to prevent outside
pressure being exerted on the terminal board.
Use an appropriate screwdriver for tightening the
terminal screws. A screwdriver with a small head will
damage 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.
Tightening torque (N•m)
M8 (Power terminal block)
M8 (Ground)
Recommendations 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.) (See figure 24)
5.5~7.3
Installation manual
13