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REFRIGERANT PIPING WORK
13 REFRIGERANT PIPING WORK
Before refrigerant piping work, drain piping work and insulation are required. Refer to the Chapter
!
D A N G E R
•
Do not perform refrigerant piping work, drain pumping, and refrigerant charge without referring to the technical documentation of the
outdoor unit.
13.1 PIPING MATERIALS
1 Prepare locally-supplied copper pipes.
2 Select the appropriate pipe size according to the table below.
3 Select clean copper pipes. Make sure there is no dust and water inside. Use a pipe cutter when cutting the pipes, to avoid a
grind swarf generation. Do not use a saw or a grind stone to cut pipes. Blow the inside of the pipes with nitrogen or dry air, to
remove any dust or foreign materials before connecting pipes.
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N O T E
Refer to the technical documentation of the outdoor unit for detail on allowable pipe length.
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Notice for Refrigerant Pipe Ends
Due to the change of the refrigerant oil, the refrigerant cycle is more subject to foreign matters such as moisture, oxide film, and
fat. Be careful that moisture, dust or different refrigerant does not enter the refrigerant cycle during installation work. Otherwise
such parts as an expansion valve might bite into foreign matters and so the operation will be unavailable.
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PMML0549 rev.1 - 02/2021 - A10761230A
Model
RCD-0.8FSR
RCD-1.0FSR
RCD-1.5FSR
RCD-2.0FSR
RCD-2.5FSR
RCD-3.0FSR
RCD-4.0FSR
RCD-5.0FSR
RCD-6.0FSR
In case of getting the pipe through a
hole in the wall
Correct
Incorrect
Hole
Hole
Attach a cap or put a plastic bag
over the pipe end
In case of rain
Correct
Incorrect
Rain water can come in
Rubber band
Attach a cap or put a plastic bag
over the pipe end
Unit: mm
Gas Pipe
Liquid Pipe
Ø12.7
Ø6.35
Ø15.88
Ø9.52
Do not place the pipe directly on
the ground.
Correct
Incorrect
Attach a cap or put a plastic bag
over the pipe end
for details.
"14 Drain piping"
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