Electrical Wiring; General Precautions On Wiring; Recommended Wire Length And Wire Diameter For Power Supply System; Wiring System Diagrams - Panasonic U-200PE1E8 Installation Instructions Manual

5. ELECTRICAL WIRING

5-1. General Precautions on Wiring

(1) Before wiring, confirm the rated voltage of the unit as
shown on its nameplate, then carry out the wiring closely
following the wiring diagram.
(2) Provide a power outlet to be used exclusively for each unit
and a circuit breaker for overcurrent protection should be
provided in the exclusive line.
(3) To prevent possible hazards from insulation failure, the unit
must be grounded.
(4) Each wiring connection must be done in accordance with
the wiring system diagram. Wrong wiring may cause the
unit to misoperate or become damaged.
(5) Do not allow wiring to touch the refrigerant tubing,
compressor, or any moving parts of the fan.
(6) Unauthorized changes in the internal wiring can be very
dangerous. The manufacturer will accept no responsibility
for any damage or misoperation that occurs as a result of
such unauthorized changes.
(7) Regulations on wire diameters differ from locality to
locality. For field wiring rules, please refer to your LOCAL
ELECTRICAL CODES before beginning.
You must ensure that installation complies with all relevant
rules and regulations.
(8) To prevent malfunction of the air conditioner caused by
electrical noise, care must be taken when wiring as follows:
● The remote control wiring and the inter-unit control wiring
should be wired apart from the inter-unit power wiring.
● Use shielded wires for inter-unit control wiring between units
and ground the shield on both sides.
(9) If the power supply cord of this appliance is damaged,
it must be replaced by a repair shop designated by the
manufacturer, because special-purpose tools are required.

5-3. Wiring System Diagrams

(Example for 3-phase outdoor unit)
Indoor
unit
Power supply* L
L
N
220 – 240 V ~50/60 Hz
N
Ground
B
Remote U1
U2
controller
D
Ground
WHT
1 1 1
BLK 2 2 2
* Regarding S-250PE1E8, the power supply is 220-240V, 50Hz only.
N OTE
(1) Refer to Section 5-2. "Recommended Wire Length
and Wire Diameter for Power Supply System" for the
explanation of "A", "B" and "C" in the above diagrams.
(2) The basic connection diagram of the indoor unit shows
the 7P terminal board, so the terminal boards in your
equipment may differ from the diagram.
(3) Refrigerant Circuit (R.C.) address should be set before
turning the power on.
5-2. Recommended Wire Length and Wire Diameter
for Power Supply System
Outdoor unit (3-phase)
(A) Power supply Time delay
fuse or circuit
Wire size Max. length
capacity
U-200PE1E8 14 mm 2 116 m 15 A
U-250PE1E8 14 mm 2 96 m 20 A
Indoor unit
(B) Power supply
Time delay fuse or
Type
circuit capacity
2.5 mm 2
E1 Max. 50/30 m 10/16 A
Control wiring
(C) Inter-unit (between outdoor
(D) Remote control wiring
and indoor units) control wiring
0.75 mm (AWG #18)
2
0.75 mm 2 (AWG #18)
Use shielded wiring* 1
Max. 1,000 m Max. 500 m* 2
N OTE
With ring-type wire terminal.
*1
When the type "E1" is used with maximum length of 500 m
*2
for group control, and if the remote controller for the group
control is wireless, the maximum length will be 400 m.
Outdoor unit (3-phase)
INV unit
A
C
L1
Power supply
L1
L2
U1
L2
380 – 415 V, 3N, ~ 50/60 Hz
L3
U2
L3
N
N
Ground
Indoor Unit Outdoor Unit
7P terminal board
5P terminal board
L N U1 U2 R1 R2 L1 L2 L3 N
Unit Remote Power
Power
supply control controller supply
wiring line
2P terminal board
E1 Type
Unit Control
Line
13
CAUTION
(1) When linking the outdoor units in a network, disconnect the terminal extended from the short plug (CN003, 2P Black,
location: right bottom on the outdoor main control PCB) from all outdoor units except any one of the outdoor units.
(When shipping: In shorted condition.)
(2) Do not install the inter-unit control wiring in a way that forms a loop. (Fig. 5-1)
Outdoor unit Outdoor unit
Indoor unit
(3) Use shielded wires for inter-unit control wiring (c) and ground the shield on both sides, otherwise misoperation from noise
my occur. (Fig. 5-2)
Connect wiring as shown in Section "5-3. Wiring System Diagram."
Shielded wire
Ground
(4) Use the standard power supply cables for Europe (such as H05RN-F or H07RN-F which conform to CENELEC (HAR) rating
specifications) or use the cables based on IEC standard. (245 IEC57, 245 IEC66)
Loose wiring may cause the terminal to overheat or result in unit malfunction. A fire hazard may also exist.
WARNING
Therefore, ensure that all wiring is tightly connected.
When connecting each power wire to the terminal, follow the instructions on "How to connect wiring to the terminal" and fasten the wire
securely with the fixing screw of the terminal plate.
How to connect wiring to the terminal
Stranded wire
■ For stranded wiring
Ring
(1) Cut the wire end with cutting pliers,
pressure
then strip the insulation to expose
terminal
the stranded wiring about 10 mm and
tightly twist the wire ends. (Fig. 5-3)
(2) Using a Phillips head screwdriver,
remove the terminal screw(s) on the
terminal plate.
(3) Using a ring connector fastener or
pliers, securely clamp each stripped
wire end with a ring pressure terminal.
(4) Place the ring pressure terminal,
Fig. 5-3
and replace and tighten the removed
terminal screw using a screwdriver.
(Fig. 5-4)
■ Examples of shield wires
(1) Remove cable coat not to scratch braided shield. (Fig. 5-5)
(2) Unbraid the braided shield carefully and twist the
unbraided shield wires tightly together. Insulate the shield
wires by covering them with an insulation tube or wrapping
insulation tape around them. (Fig. 5-6)
(3) Remove coat of signal wire. (Fig. 5-7)
(4) Attach ring pressure terminals to the signal wires and the
shield wires insulated in Step (2). (Fig. 5-8)
Outdoor unit
Prohibited
Prohibited
Indoor unit Indoor unit
Ground
Special
Screw
washer
Screw and
Ring pressure
Special washer
terminal
Terminal plate
Wire
Wire
Fig. 5-4
Fig. 5-5
Insulation tape Shield mesh
Fig. 5-6
Insulation tape
Shield mesh
Fig. 5-7
Fig. 5-8
14
Fig. 5-1
Fig. 5-2
Ring
pressure
terminal