Carrier X-POWER Series Service Manual page 108

R410a DC Inverter 60Hz
appear on the inner side of the pipe, and the pipe may easily get broken.
4) Ensure that the pipe does not sink during the bending process; ensure that the cross section of the bending
pipe is larger than 2/3 of the original area, otherwise it cannot be used.
the pipe sink easily on the side
3.1.4 Brazing welding operation
3.1.4.1 Selecting refrigerant pipe
1. All pipe use shall comply with national or local standards (for example, pipe diameter, material,
thickness, etc.)
2. Specification: Seamless phosphorus to oxygenate copper pipe
3. Try best to use straight pipe or coil and avoid too much brazing welding.
Note: Select the pipes according to the pipe diameters shown below (O—coil, 1/2H—straight pipe)
Outer Minimum
Material
Diameter Thickness
O
1/4" (6. 4)
O
3/8" (9. 53)
O
1/2" (12. 7)
5/8"(Ф15. 9) O
3.1.4.2 Nitrogen filling for protecting copper pipe during brazing welding
1. Purpose: Avoid oxide scale from appearing on the inner wall of the copper pipe in the high
temperature
2. Risks of non-protective welding:
If no sufficient nitrogen is charged into the refrigerant pipe being welded, oxides will be generated on the
inner wall of the copper pipe. These oxides will block the refrigerant system, which will lead to all kinds of
malfunctions such as burn-out the compressor, poor cooling efficiency.
To avoid these problems, charge nitrogen continuously into the refrigerant pipe during the brazing
welding, and ensure that the nitrogen passes through the operating point until the welding is completed
and the copper pipe cools down completely. The schematic diagram for nitrogen charging is shown
below.
126
Outer Diameter
0. 8 3/4''(Ф19. 0)
0. 8 55/64''(Ф22. 0)
0. 8 63/64''(Ф25. 0)
1. 0 1-1/8''(Ф28. 6)
twinkle will easily appear on this side
Minimum
Material Outer Diameter
Thickness
O 1. 0 1-1/2''(Ф38. 0)
1/2H 1. 2 1-49/64''(Ф45. 0)
1/2H 1. 2 2-1/8''(Ф54. 0)
1/2H 1. 3 2-41/64''(Ф67. 0)
Carrier service manual
Minimum
Material
Thickness
1/2H 1. 5
1/2H 1. 5
1/2H 1. 8
1/2H 1. 8
Installation