Daikin RZQS100B7V3B [291/344] After completing the installation carry out an inspection of the piping connections by pressure test using nitrogen

Daikin RZQS100B7V3B [291/344] After completing the installation carry out an inspection of the piping connections by pressure test using nitrogen
Piping Diagrams SiBE27-702
278 Appendix
Caution for flare
connections
Refer to below table for correct flare dimensions and tightening torques. Too high tightening
force may cause refrigerant leak because of flare cracking:
When connecting the flare nut, apply refrigerating machine oil to the flare (inside and
outside) and first screw the nut 3 or 4 turns by hand. Coat the indicated surfaces using ether
or ester oil:
After completing the installation, carry out an inspection of the piping connections by
pressure test using nitrogen.
Piping size
Flare nut
tightening torque
A dimensions for
processing flares (mm)
Flare shape
φ 6.4
14.2~17.2 N·m
(144~176 kgf·cm)
8.7~9.1
φ 9.5
32.7~39.9 N·m
(333~407 kgf·cm)
12.8~13.2
φ 12.7
49.5~60.3 N·m
(504~616 kgf·cm)
16.2~16.6
φ 15.9
61.8~75.4 N·m
(630~770 kgf·cm)
19.3~19.7
φ 19.1
97.2~118.6 N·m
(989.8~1208 kgf·cm)
23.6~24.0
R=0.4~0.8
45°
±
2
90°
±0.5
A

Содержание

Скачать