Carrier X-POWER Series Service Manual page 107

Carrier service manual
Pipe
Diameter
(kgf-cm)
1/4" (6. 4) 144~176
3/8" (9. 53) 333~407
1/2" (12. 7) 504~616
5/8" (15. 9) 630~770
3/4" (19. 1) 990~1210
Caution: When you are tightening the flaring nut with a spanner, the tightening torque will be suddenly
increased at a certain point. From this point, further tighten the flaring nut to the angles shown below.
Pipe Diameter
3/8" (9. 53)
1/2" (12. 7)
5/8" (15. 9)
7) Check whether the surface of the flaring opening is damaged. The size of the flaring opening is as
shown below.
Pipe Diameter
Size of Flaring Opening
1/4" (6. 4)
3/8" (9. 53)
1/2" (12. 7)
5/8" (15. 9)
3/4" (19. 1)
Cautions:
a. Apply some refrigeration oil onto the inner surface and outer surface of the flaring opening, to facilitate the
connection or rotation of the flaring nut, ensure close sticking between the sealing surface and the bearing
surface, and avoid pipe bending.
b. Ensure that the flaring opening is not cracked or deformed, otherwise it cannot be sealed or, after the
system runs for some time, refrigerant leakage will occur.
3.1.3.5 Pipe bending
1. Method
1) Manual bending: Suitable for thin copper pipes (ф6. 4-ф12. 7).
2) Mechanical bending: Suitable in a wide range of copper pipes (ф6. 4-ф67). Spring bender, manual bender
or electric bender is used.
Purpose: Reduce welding joints and required elbows, and improve engineering quality; In order to save
material, no joint is needed.
2. Caution
1) When bending a copper pipe, ensure that there is no twinkle or deformation on the inner side of the pipe.
2) When using a spring bender, ensure that the bender is clean before inserting it in the copper pipe.
3) When using a spring bender, ensure that the bending angle does not exceed 90°, otherwise twinkle will
Installation
Torque
(N-cm)
1420~1720
3270~3990
4950~6030
6180~7540
9270~11860
Angle of further tightening
60°~90°
30°~60°
30°~60°
R410A
(A)
8. 7~9. 1
12. 8~13. 2
16. 2~16. 6
19. 3~19. 7
23. 6~24. 0
Legend
Spanner
Tubing tie-in
Recommended length of tool lever
About 7-7/8in.(200mm)
About 9-27/32in.(250mm)
About 11-13/16in.(300mm)
Legend
R410a DC Inverter 60Hz
Torque spanner
Flaring opening nut
125