Electrical Wiring; Indoor Unit - Panasonic S-3650PU3E Technical Data & Service Manual

1-10. Electrical Wiring

Indoor Unit

1. Type U3
S-3650PU3E, S-6071PU3E
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.
WARNING
(2) This equipment is strongly recommended to be installed with Earth Leakage Circuit Breaker (ELCB) or Residual Current
Device (RCD). Otherwise, it may cause electrical shock and fire in case of equipment breakdown or insulation breakdown.
Earth Leakage Circuit Breaker (ELCB) must be incorporated in the fixed wiring in accordance with the wiring regulations.
The Earth Leakage Circuit Breaker (ELCB) must be an approved circuit capacity, having a contact separation in all poles.
(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.
CAUTION
Check local electrical codes and regulations before wiring. Also, check any specified instruction or
limitations.
Recommended Wire Length and Wire Diameter for Power Supply System
Check the type of the outdoor unit terminal board
as illustrated below and make connection.
If 1, 2 and 3 are shown on the terminal
board, it is for 3-line connection.
Indoor unit
(Type of 3-line connection [1, 2 and 3] with indoor and outdoor units)
Type
U3
Control wiring
(C) Inter-unit (between Integrated
control system and indoor units)
control wiring
0.75 mm 2
(AWG #18)
Use shielded wiring*
Max. 1,000 m
NOTE
*
With ring-type wire terminal.
Power supply cable
Connection cable between outdoor and indoor unit
(F) Outdoor unit
U-36 ~ 71PZ3E5
1.5 mm
Max. 40 m
(D) Remote control wiring
0.75 mm 2
(AWG #18)
(D) + (E) : Max. 500 m (E) : Max. 200 m
The above descriptions can be used for the model CZ-RTC4 or CZ-RTC5B. For
other remote controllers, refer to the manual of each unit.
1-10-1-1-1
L N 1 2 3
Connection cable between
outdoor and indoor unit
2
(E) Remote control wiring for group
control
0.75 mm 2
(AWG #18)
1