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• After connecting the cables, make sure terminal numbers on the indoor/outdoor unit matches. • Screws on terminal block must not be unscrewed with the torque less than 12kgf•cm. 10. Connect the grounding conductor to the grounding terminals. 11. Close the terminal board cover by tightening the screw carefully. • In Russia and Europe, consult with the supply authority to determine the supply system impedance before installation. • Connect the wires firmly so that wires can not be pulled out easily. (If they are loose, it could cause burn-out of the wires.) • Connect the wires according to color codes, referring to the wiring diagram. • The power cable and the interconnection cable should be selected according to the specification in page 32. Installing and connecting the assembly pipe of the indoor unit Connect indoor and outdoor units with field-supplied copper pipes by means of flare connections. Use insulated seamless refrigeration grade pipe only, (Cu DHP type according to ISO1337), degreased and deoxidized, suitable for operating pressures of at least 4200 kPa and for burst pressure of at least 20700 kPa. Under no circumstances must sanitary type copper pipe be used. There are 2 refrigerant pipes of different diameters: • The smaller one is for the liquid refrigerant • The larger one is for the gas refrigerant A short pipe is already fitted to the air conditioner. You may need to extend the pipe using the assembly pipe (optional). The connection procedure for the refrigerant pipe varies according to the exit position of the pipe when facing the wall: • Right(A) • Left(B) • Underside(C) • Rear BAC 1. Cut out the appropriate knock-out piece (A, B, C) on the rear of the indoor unit unless you connect the pipe directly from the rear. 2. Smooth the cut edges. 3. Remove the protection caps of the pipes and connect the assembly pipe to each pipe. Tighten the nuts first with your hands, and then with a torque wrench, applying the following torque: Outer Diameter Torque (kgf•cm) o6.35 mm 140~170 o9.52 mm 250~280 o12.70 mm 380~420 o15.88 mm 440~480 o19.05 mm 990~1210 o22.23 mm 990~1210 • If you want to shorten or extend the pipes, refer to page 35~36. 4. Cut off the remaining foam insulation. 5. If necessary, bend the pipe to fit along the bottom of the indoor unit. Then pull it out through the appropriate hole. . The pipe should not project from the rear of the indoor unit. . The bending radius should be 100 mm or more. 6. Pass the pipe through the hole in the wall. 7. For further details on how to connect to the outdoor unit and purge the air, refer to page 38~40. • The pipe will be insulated and fixed permanently into position after finishing the installation and the gas leak test; refer to page 41~42 for further details. • Tighten the flare nut with torque wrench according to specified method. If the flare nut is over-tightened, the flare may break and cause refrigerant gas leakage. • DO NOT WALL UP THE PIPE CONNECTION ! All refrigerant pipe connection must be easy accessible and serviceable. Purging the indoor unit The indoor unit is supplied with inert gas (nitrogen). Before installing the unit, check if nitrogen gas flow out of indoor unit. If this one isn’t true, DO NOT INSTALL THE UNIT since leakage could be inside the indoor unit. 1. Unscrew the caps at the end of each pipe. . All inert gas exhausts from the indoor unit. • To prevent dirt or foreign substances from getting into the pipes during installation, do NOT remove the caps completely until you are ready to connect the pipes. • The remaining air in the Refrigeration cycle, which contains moisture, may cause malfunction on the compressor. • Always contact the service center or a professional installation agency for product installation. Unscrew the caps Pipes Cutting or extending the pipe The length of the pipe can be: • Extended up to : see table page 28 • Shorten up to: see page 28 If you need a pipe longer than 5 meters: • You must extend the assembly cable. • You must add refrigerant to the pipes; otherwise, the indoor unit may freeze. 1. Make sure that you have all the required tools (pipe cutter, reamer, flaring tool and pipe holder). 2. If you want to shorten the pipe, cut it using a pipe cutter, ensuring that the cut edge remains at 90° with the side of the pipe (see below examples of correct and incorrect cut edges). Pipe cutter Oblique Rough Burr Pipe 3. To prevent a gas leak, remove all burrs at the cut edge of the pipe using a reamer. • Face the pipe down while removing the burrs to make sure that burrs do not get in to the pipe. 4. Put a flare nut slightly into the pipe and modify the flare. Outer Diameter (D) Depth (A) Flaring Size (B) o6.35 mm 1.3 mm 9.0 mm o9.52 mm 1.8 mm 13.0 mm o12.70 mm 2.0 mm 16.2 mm o15.88 mm 2.2 mm 19.3 mm o19.05 mm 2.2 mm 22.5 mm o22.23 mm 2.2 mm 25.7 mm Flare Pipe Cutting or extending the pipe 5. Check if you flared the pipe correctly (see examples of incorrectly flared pipes below). Correct Uneven Thickne...
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