AIR-CONDITIONING-Service Adjustment Procedures
24-39
HANDLING TUBING AND FllTlNGS
N24FlAA
12-15 Nm
9-l 1 ft.lbs.\
20-25 Nm
15-18 ftlbs.
\
22-25 ftlbs.
15-18 ft.lbs.
20-25 Nm 15-18 ft
2080122
Kinks in the refrigerant tubing or sharp bends in the refrigerant hose lines will greatly reduce the capacity of the
entire system. High pressures are produced in the system when it is operating. Extreme care must be exercised
to make sure that all connections are pressure tight.‘Dirt and moisture can enter the system when it is opened for
repair or replacement of lines or components. The following precautions must be observed.
The system must be completely discharge before opening any fitting or connection in the refrigeration system.
Open fittings with caution even after the system has been discharged. If any pressure is noticed as a fitting is
loosened, allow trapped pressure to bleed off very slowly.
Never attempt to rebend formed lines to fit. Use the
correct line for the installation you are servicing.
A good rule for the flexible hose lines is keep the radius of all bends at least 10 times the diameter of the hose.
Sharper bends will reduce the flow of refrigerant. The flexible hose lines should be routed so that they are at least
80 mm (3 in.) from the exhaust manifold. It is good practice to inspect all flexible hose lines at least once a year
to make sure they are in good condition and properly routed.
Unified plumbing connections with O-rings. These O-rings are not reusable.
1 STB Revision
