3 Piping work and refrigerant charge
Copper pipes, sizes, connection and insulation
SMGB0099 rev.0 - 12/2016
97
3
3.2 Copper pipes, sizes, connection and insulation
3.2.1 Copper pipes and sizes
!
C A U T I O N
• The copper pipe used in the refrigeration installations is different to the copper pipe used in installations carrying domestic or heating
water.
•
The copper pipe for refrigeration installations is especially treated for outdoors and indoors. The interior surface finish makes it easier
for the refrigerant to circulate and withstands the action of the lubricant oil applied to outdoor equipment.
Prepare the copper pipes provided by the supplier.
Select the pipe with the appropriate diameter and thickness. Use the table below to select the most appropriate pipe:
Nominal diameter
Thickness mm
Supply
mm
Inches
Ø6.35
1/4
0.80
Coil (soft)
Ø9.52
3/8
0.80
Coil (soft)
Ø12.70
1/2
0.80
Coil (soft)
Ø15.88
5/8
1.00
Straight lengths (hard) / Coil (soft)
Ø19.05
3/4
1.00
Coil (soft)
Ø22.22
7/8
1.00
Coil (soft)
Ø25.40
1
1.00
Straight lengths (hard half)
Ø28.57
1-1/8
1.00
Straight lengths (hard half)
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).
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.
A
A
B
