Panasonic CU-B14DBE5, Service Manual, Page: 48 / 109

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2. Local pipes can project in any of four directions.
• Make holes in the pipe panels for the pipes to pass through.
• Be sure to install the pipe panels to prevent rain from getting inside the outdoor unit.
[Removing the service panel].
3. Notes when connecting the refrigerant pipes.
• Use clean copper, pipes with no water or dust on the insides.
• Use phosphorus-free, unjointed copper pipes for the refrigerant pipes.
• If it is necessary to cut the refrigerant pipes, be sure to use a pipe cutter, and use compressed nitrogen or an air blower to
clean out any foreign particles from inside the pipe.
• Be careful not to let any dust, foreign materials or water get inside the pipes during connection.
• If bending the pipes, allow as large a bending radius as possible. Do not flex the pipes any more than necessary.
• If joining pipe ends, do so before tightening the flare nut.
• Always blow the pipe end with nitrogen while joining pipe ends.
(This will prevent any oxide scaling from occurring inside the pipe.)
• If using long pipe lengths with several joined pipe ends, insert strainers inside the pipes. (Strainers are not supplied.)
• When tightening the flare nuts, coat the flare (both inside surfaces) with a small amount of refrigerator oil, and screw in about
3-4 turns at first by hand.
• Refer to the following table for the tightening torques. Be sure to use two spanners to tighten.
(If the nuts are overtightened, it may cause the flares to break or leak.)
4. After piping connection has been completed, make sure that the joint areas of the indoor and outdoor units are free from gas
leakage by the use of nitrogen, etc.
5. Air purge within connection piping shall be carried out by evacuation.
6. Close the tube joining area with putty heat insulator (local supply) without any gap as shown in below figure.
(To prevent insects or small animal entering)
(1)
(2)
Remove the two mounting screws.
Slide the service panel downward to release the pawls. After this, pull the
service panel toward you to remove it.