Samsung AM CNB C AA Series Technical Data Book page 59

13. Installation
Specifications of the cable protection tube
Name
Flexible PVC conduit
Class 1 flexible
Galvanized steel sheet
conduit
Class 1 PVC coated Galvanized steel sheet
flexible conduit and Soft PVC compound
Power and communication wiring diagram
ELCB
or
MCCB
+ ELB
Earth
▶ The communication cable between indoor and outdoor units has no polarity.
▶ Arrange the cables using a clamp attached on the left side of the terminal board.
▶ When you connect the power cable, you must apply rated tightening torque to connect the screws for
the terminal board.
Material
When the cable tube is installed indoor and not exposed to outside,
PVC
because it is embedded in concrete structure
When the cable tube is installed indoor but exposed to outside so there
are risk of damage to the cable tube
When the cable tube is installed outdoor and exposed to outside so there
are risk of damage to the cable tube and extra waterproof is needed
Communication cable
between indoor and
outdoor units
Applicable conditions
Indoor and outdoor unit
communication
R S T N
Earth
PBA
DVM Hydro unit / Hydro unit HT