3.1 Piping work connection considerations
3.1.1 Copper pipes and sizes
1
Prepare locally-supplied copper pipes.
2
Select the correct pipe size and material. Use the table below to select the required piping.
Nominal Diameter
Thickness
(mm)
Copper Type
(mm)
(in)
Ø6.35
1/4
0.80
Roll
Ø9.52
3/8
0.80
Roll
Ø12.7
1/2
0.80
Pipe/Roll
Ø15.88
5/8
1.00
Roll
Ø19.05
3/4
1.00
Pipe/Roll
Ø22.23
7/8
1.00
Pipe/Roll
Ø25.4
1
1.00
Pipe
Ø28.58
11/8
1.25
Coil
3
Select clean copper pipes. Make sure there is no dust and moisture inside. Blow the inside of the pipes through with
oxygen-free nitrogen to remove any dust and foreign materials before connecting pipes.
4
After connecting the refrigerant piping, seal the open space between the knockout hole and refrigerant pipes by using
insulation material as shown below:
Insulation
Field-supplied
refrigeration piping
Insulation
Insulation
?
N O T E
If copper pipe is used for piping bigger than Ø19.05 flaring work can not be performed. If necessary, use a joint adapter.
!
C A U T I O N
•
Do not use saws, grindstone or other tools which might create copper dust.
•
When cutting pipes, secure the part to be soldered as shown in the Service Manual.
•
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).
3 Piping work and refrigerant charge
Piping work connection considerations
SMGB0091 rev.2 - 11/2015
30