Panasonic U-5MX3XPQB Manual De Instalación página 17

7.5. Examples
System example (See figure 11)
1 Field power supply
2 Main switch
3 Earth leakage breaker
4 Fuse
5 Cool/heat selector
6 Remote controller
Power supply wiring (sheathed cable)
Transmission wiring (sheathed cable)
Field line connection
L1, L2, L3, N-phase of the power cord should be clamped to the
plastic bracket using field supplied clamp material.
The green and yellow striped wrapped wires should be used for
grounding. (See figure 10)
1 Power supply (400 V, Three-phase)
2 Fuse
3 Grounding wire
4 Earth leakage breaker
5 Attach insulation sleeves
6 Power supply terminal block
7 Ground wire
8 Clamp the ground wires along with the power wires using field supplied
clamps.
9 Clamp each power wire separately to the plastic brackets using field
supplied clamps.
10 When wiring, do not allow the ground wires to contact the compressor
lead wires. If the wires contact each other, adverse effects may occur
to other units.
11 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.
12 Crimp-style terminal
13 Wire gauge: Small
14 Wire gauge: Large
15 Plastic bracket
See figure 19
1 Electric wiring
2 Wiring between units
3
Clamp to the electric box with field supplied clamps.
4 When routing out the power/ground wires from the right side:
5 When routing the remote control cord and inter-unit wiring, secure
clearance of 50 mm or more from the power wiring. Ensure that the power
wiring does not contact any heated sections (
6 Clamp to the back of the column support with field supplied clamps.
7 When routing out the inter-unit wirings from the opening for piping:
8 When routing out the power/ground wires from the front:
9 When routing out the ground wires from the left side:
10 Grounding wire
11 When wiring, pay attention not to detach the acoustic insulators from the
compressor.
12 Power supply
13 Fuse
14 Earth leakage breaker
15 Ground wire
16 Unit A
17 Unit B
18 Unit C
U-5~48MX3XPQB
Urban Multi air conditioner
4PW21867-1A
Field line connection: transmission wiring and cool/heat
selection
).
In case of U-5~16MX3 (See figure 14)
1
2
3
4
5
6
7
Precautions when laying power wiring
Use round pressure terminals for connections to the power
terminal block.
When none are available, follow the instructions below.
Do not connect wiring of different thicknesses to the
power terminal block. (Slack in the power wiring may
cause abnormal heat.)
When connecting wiring which is the same thickness,
do as shown in the figure below.
1 Round pressure terminal
2 Power wire
1 2
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
strip 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)
M3 (Inter-unit wiring terminal block)
Precautions 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.)
1 Round pressure terminal
2 Cut out section
3 Cup washer
1 2 3
Cool/heat selector
Outdoor unit PC board (A1P)
Take care of the polarity
Use the conductor of sheathed wire (2 wire) (no polarity)
Terminal board (field supply)
Indoor unit
Outdoor unit
5.5~7.3
0.8~0.97
Installation manual
14