Samsung Duct Type Series Installation Manual page 22

Wiring work
• Make sure that the connection parts are not exposed to outside.
• Be sure to use insulation tape and a contraction tube made of approved reinforced insulating materials that have
CAUTION
the same level of withstand voltage with the power cable. (Comply with the local regulations on extensions.)
• In case of extending the electric wire, please DO NOT use a round-shaped Pressing socket.
- Incomplete wire connections can cause electric shock or a fire.
WARNING
• Select the power cable in accordance with relevant local and national regulations.
• Wire size must comply with local and national code.
CAUTION
• For the power cable, use the grade of H07RN-F or H05RN-F materials.
• You should connect the power cable into the power cable terminal and fasten it with a clamp.
• The unbalanced power must be maintained within 10 % of supply rating among whole indoor units.
• If the power is unbalanced greatly, it may shorten the life of the condenser. If the unbalanced power is exceeded
over 10 % of supply rating, the indoor unit is protected, stopped and the error mode indicates.
• To protect the product from water and possible shock, you should keep the power cable and the connection
cord of the indoor and outdoor units in the iron pipe.
• Connect the power cable to the auxiliary circuit breaker. An all pole disconnection from the power supply must
be incorporated in the fixed wiring(≥3 mm(1/8")).
• You must keep the cable in a protection tube.
• Keep distances of 50 mm(2") or more between power cable and communication cable.
• Maximum length of power cables are decided within 10 % of power drop. If it exceeds, you must consider
another power supplying method.
• The circuit breaker(ELCB or MCCB+ELB) should be considered more capacity if many indoor units are connected
from one breaker.
• Use round pressure terminal for connections to the power terminal block.
• For wiring, use the designated power cable and connect it firmly, then secure to prevent outside pressure being
exerted on the terminal board.
• Use an appropriate screwdriver for tightening the terminal screws. A screwdriver with a small head will strip the
head and make proper tightening impossible.
• Over-tightening the terminal screws may break them.
• See the table below for tightening torque for the terminal screws.
M3.5
M4
22
Tightening torque
N•m lbf•ft
0.8~1.2 0.59~0.89
1.2~1.8 0.89~1.1