Panasonic S-M20PY3E Installation Instructions Manual page 32

3) Only one refrigerant system is 3-line connection and other refrigerant systems are
2-line connection:
(5) Use shielded wires for inter-unit control wiring
(C) and ground the shield on both sides,
otherwise misoperation from noise may occur.
Connect wiring as shown in Section 4-3.
(6) • In the case of 3-line connection, connection cable between outdoor and indoor unit
shall be approved polychloroprene sheathed flexible cord. Type designation
60245 IEC57 (H05RN-F, GP85PCP etc.) or heavier cord.
• 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. (60245 IEC57, 60245 IEC66)
WARNING
Loose wiring may cause the terminal to overheat or result in unit malfunction. A fire
hazard may also occur. 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 terminal screw.
Outdoor unit
Outdoor unit
Outdoor unit
: Branch point
Outdoor unit
Outdoor unit
Outdoor unit
: Branch point
Central Controller
Indoor unit
Indoor unit
Indoor unit
Central Controller
Indoor unit
Indoor unit
Indoor unit
(Functional earthing)
32
Indoor unit
Indoor unit
Indoor unit
Indoor unit
Shielded wire
Indoor unit
Indoor unit
Indoor unit
Indoor unit
(Functional earthing)