Technical Information

Piping work and
refrigerant charge
TCGB0079 rev.0 - 01/2013
119
9.3 Copper pipes, sizes and connection
9.3.1 Copper pipes and sizes
1 Prepare locally-supplied copper pipes.
2 Select the pipe size of a suitable thickness 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
Ø12.70 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
Ø25.40 1 1.00 Pipe
Ø28.60 1
1/8
1.25 Pipe
N O T E
Ifcopper pipe is used for piping bigger than Ø19.05, aringwork cannot beperformed. Ifnecessary, use a joint
adapter.
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:
A. Insulation.
B. Field-supplied refrigeration piping.
N O T E
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chapter2oftheServiceManual(SMxx0064).
• 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pro-
tection,etc).
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TCGB0079_rev0_11-2012.indb 119 29/01/2013 14:27:30