Hitachi FSXN Series Service Manual page 38

3 Piping work and
refrigerant charge
Select the pipe with the appropriate diameter and thickness. Use the table below to select the most appropriate pipe:
Nominal diameter
mm Inches
ø6.35 1/4
ø9.53 3/8
ø12.7 1/2
ø15.88 5/8
ø19.05 3/4
ø22.2 7/8
Always use clean copper pipes with no signs of knocks or cracks. Make sure there is no dust or dampness on the inside.
Before you install the pipes, clean the inside with oxygen-free nitrogen gas to eliminate any remains of dust or other
substances.
C A U T I O N
• Do not use hand saws, circular saws, abrasive grinders or other tools that generate shavings.
• Strictly follow national or local regulations regarding occupational health and safety.
• Wear appropriate means of protection during cutting or brazing operations and installation (gloves, eye
protection, etc).
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SMGB0065 rev. 1 - 12/2010
Thickness mm Supply
0.80 Roll
0.80 Roll
0.80 Roll
1.00 Roll
1.00 Pipe
1.00 Pipe
Nominal diameter
mm Inches
ø25.4 1
ø28.6 1-1/8
ø31.75 1-1/4
ø38.1 1-1/2
ø41.3 1-5/8
ø44.45 1-3/4
On completing the installation of the refrigerant pipes -B-,
insulate them appropriately using suitable insulating
material -A- and seal the open space between the holes
made and the pipe, as shown in the figure.
Thickness mm Supply
1.00 Pipe
1.00 Pipe
1.10 Pipe
1.35 Pipe
1.45 Pipe
1.55 Pipe
3