Charging With Refrigerant - Panasonic CS-F14DD3E5 Service Manual

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.)
10.4.7. Heat insulation
Use a material with good heat-resistant properties as the
Caution heat insulation for the pipes. Be sure to insulate both the
gas-side and liquid-side pipes. If the pipes are not
adequately insulated, condensation or water leakages
may occur.

10.4.8. Charging with refrigerant

1.5 HP 2 HP (14 18 type)
• At the time of shipment from the factory, this unit is charged with enough refrigerant for an equivalent pipe length of 20m. If the
equivalent pipe length used will be 20m or less, no additional charging will be necessary.
• If the equivalent pipe length will be between 20 and 30m, charge with additional refrigerant according to the equivalent length
given in the table below.
Liquid-side pipes
Gas-side pipes
51
Material that can withstand
120°C or higher