System Examples; Leading Power Line And Transmission Line; Field Line Connection: Transmission Wiring And Cool/Heat Selection - Panasonic U-5MX4XPQ Installation Manual

8.5.

System examples

(See figure 15)
1 Field power supply
2 Main switch
3 Earth leakage breaker
4 Outdoor unit
5 Indoor unit
6 Remote controller
Power supply wiring (sheathed cable) (200 V)
Transmission wiring (sheathed cable) (16 V)
8.6.

Leading power line and transmission line

Be sure to let the power line and the transmission line pass
through a conduit hole.
Lead 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 18)
1 Electric wiring diagram. Printed on the back of the electric box lid.
2 Power wiring and ground wiring between outdoor units (inside
conduit)
(When the wiring is routed out through the lateral panel.)
3 Transmission wiring
4 Pipe opening
5 Conduit
6 Power wiring and ground wiring
7 Cut off the shaded zones before use.
8 Through cover
Precautions when knocking out knockout holes
To punch a knockout 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 knockout holes,
remove any burrs from the knockout 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 knockout holes, plug the holes with packing materials
(to be prepared on-site).
Installation manual
13
8.7.
In case of U-5~18MX4 (See figure 19)
In case of U-20~54MX4 (See figure 20)
3
Use a power wire pipe for the power wiring.
Outside the unit, make sure the weak 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 cause electrical interference,
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: power wiring" on page 14.
Inter-unit wiring should be secured as described in
"8.7. Field line connection: transmission wiring and
cool/heat selection" on page 13.
• Secure the wiring with the accessory clamps so
that it does not touch the piping and no external
force can be applied to the terminal.
• Make sure the wiring and the electric box lid do not
stick up above the structure, and close the cover
firmly.
Field line connection: transmission wiring and
cool/heat selection
1 Cool/heat selector
2 Outdoor unit PC board (A1P)
3 Take care of the polarity
4 Use the conductor of sheathed wire (2 wire) (no polarity)
5 Terminal board (field supply)
6 Indoor unit
7 Outdoor unit
1 Unit A (Master unit)
2 Unit B (Slave unit)
3 Unit C (Slave unit)
4 To slave unit(s)
5 To indoor unit
6 To outdoor unit
7 To cool/heat selector
NOTE U-5MX4 cannot install the multi unit transmission
wiring. Run will not be successful if the wiring is
connected to Q1-Q2 (TO MULTI UNIT) terminal.
The interconnecting wiring between the outdoor units in the
same piping system 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 systems 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.
U-5~18MX4XPQ
Urban Multi air conditioner
4PW28163-1