Panasonic U-8ME3XPQ Manuel D'installation page 18

Picking power line and transmission line
Be sure to let the power line and the transmission line pass
through a conduit hole.
Pick the power line from the upper hole on the left side plate,
from the front position of the main unit (through the conduit hole
of the wiring mounting plate) or from a knock out hole to be
made in the unit's bottom plate. (See figure 16)
A Electric wiring diagram. Printed on the back of the electric box lid.
1 Cut off the shaded zones before use.
2 Through cover
3 Power wiring between outdoor units
(When the wiring is routed out through the lateral panel.)
4 Set apart
5 Transmission wire
6 Knockout hole
7 Power wiring between outdoor units (when wiring is routed through the
front panel)
Precautions when knocking out knock 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.
1 2
1 Knockout hole
2 Burr
3 If there are any possibilities that small animals enter the system
through the knock holes, plug the holes with packing materials (to
be prepared on-site).
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
"Field line connection" on page 13.
Inter-unit wiring should be secured as described in
"Field line connection" in chapter "7.4. Examples" on
page 13.
• Secure the wiring with the accessory 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.
Installation manual
15
3
cause electrical interference,
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 9.
1 Liquid pipe
2 Suction gas pipe
3 Discharge gas pipe
4 Interconnecting wiring
5 Insulator
6 Finishing tape
For the above wiring, always use vinyl cords with 0.75 to 1.25 mm
sheath or cables (2 core wires).
In case of U-18~48ME3
The interconnecting wiring between the outdoor units in the
same pipe line must be connected to the Q1/Q2 (Out Multi)
terminals. Connecting the wires to the F1/F2 (Out-Out) terminals
results in system malfunction.
The wiring for the other lines must be connected to the F1/F2
(Out-Out) terminals of the P-board in the outdoor unit to which
the interconnecting wiring for the indoor units is connected.
The base unit is the outdoor unit to which the interconnecting
wiring for the indoor units is connected.
The interconnecting wiring between the outdoor units must be
≤30 m.
See the paragraph "Fixing field line connection" on page 14.
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 the figure in "Field line connection" in
chapter "7.4. Examples" on page 13.
Check that wiring lines do not make contact with
refrigerant piping.
Firmly close the lid and arrange the electrical wires so
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.
2
U-8~16ME3XPQ
Urban Multi air conditioner
4PW16786-1C