Connection Example Of Total System Wiring; Connecting Power Wire And Transmission Wires; Power Circuit And Cable Requirements - Panasonic URBAN MULTI Manuel D'installation

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.
• 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.

11.3. Connection example of total system wiring

(See figure 8)
1 Power
2 Earth leakage breaker
3 Branch switch overcurrent breaker (fuse)
4 Ground
5 Remote controller

11.4. Connecting power wire and transmission wires

Let the power wire (including ground wire) go through the power
outlet port on either the front, side or back of the outdoor unit.
Let the transmission wires go through the cable outlet port, pipe
outlet port or knock out hole on either the front, side or back of
the outdoor unit. (See figure 9).
A Rear direction
B Lateral direction
C Front direction
1 Power terminal block (X1M)
2 Control wiring between units
3 Power cable with ground wire. (Keep proper distance between
power cable and control wiring).
4 Clamp (field supply)
5 stop valve mounting plate
6 Electric parts box
7 Power cable
8 Ground cable (yellow/green)
9 Fix the control wiring with the clamps
10 Control PC board
11 Control terminal block (X2M)
Installation manual
14
Precautions when knocking out knockout holes
To punch a knock hole, hit on it with a hammer.
After knocking out the holes, we recommend you paint the
edges and areas around the edges using the repair paint to
prevent rusting.
When passing electrical wiring through the knock holes, remove
any burrs from the knock holes and wrap the wiring with
protective tape to prevent damage.
If there is any possibility that small animals enter the system
through the knock holes, plug the holes with packing materials
(to be prepared on-site).
1 2
1 Knockout hole
2 Burr
3 Packing materials
Use a power wire pipe for the power wiring.
Outside the unit, make sure the low voltage electric
wiring (i.e. for the remote control, between units, etc.)
and the high voltage electric wiring do not pass near
each other, keeping them at least 50 mm apart.
Proximity may
malfunctions, and breakage.
Be sure to connect the power wiring to the power
wiring terminal block and secure it as described under
"11.4. Connecting power wire and transmission wires"
on page 14.
Inter-unit wiring should be secured as described in
"11.4. Connecting power wire and transmission wires"
on page 14.
• Secure the wiring with clamps so that it does not touch
the piping.
• Make sure the wiring and the electric box lid do not
stick up above the structure, and close the cover
firmly.

11.5. 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 the phase and an
earth leakage breaker.
Phase and
Model frequency Voltage
U-4ML4
U-5ML4 1 N~50 Hz 230 V
U-6ML4
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).
When installing the earth leakage breaker make sure that it is
compatible with the inverter (resistant to high frequency
electrical noise) to avoid unnecessary opening of the earth
leakage breaker.
3
cause electrical interference,
Recom- Transmission
mended fuses line section
32 A
0.75~1.25 mm
U-4~6ML4DPQ
Urban Multi air conditioner
4PW29037-1
2