Step 7 Optional: Cutting And Flaring The Pipes - Samsung AJ NCJ2EG Series Installation Manual

Step 7 Optional: Cutting and flaring
the pipes
1 Make sure that you have the required tools available.
(pipe cutter, reamer, flaring tool, and pipe holder)
2 If you wish to shorten the pipes, cut it with a pipe
cutter, taking care to ensure that the cut edge remains
at a 90° angle with the side of the pipe. Refer to the
illustrations below for examples of edges cut correctly
and incorrectly.
90°
3 To prevent any gas from leaking out, remove all burrs
at the cut edge of the pipe, using a reamer.
4 Slide a flare nut on to the pipe and modify the flare.
D
A
Pipe Flare
Outer diameter (D) Depth (A)
ø6.35 mm 14 to 18
ø9.52 mm 34 to 42
ø12.70 mm 49 to 61
ø15.88 mm 68 to 82
5 Check that the flaring is correct, referring to the
illustrations below for examples of incorrect flaring.
Oblique Rough Burr
R 0.4 to 0.8 mm
D
L
Flare
Flare dimension (L)
8.7 to 9.1 mm
12.8 to 13.2 mm
16.2 to 16.6 mm
19.3 to 19.7 mm
1
2
Damaged
Correct Inclined
Surface
CAUTION
• Keep the piping length at a minimum to minimize the
additional refrigerant charge due to piping extension.
(Maximum allowable piping length : 15 m)
• When connecting the pipes, make sure that
surrounding objects do not interfere with or contact
them to prevent refrigerant leakage due to physical
damage.
• Make sure that the spaces where the refrigerant pipes
are installed comply with national gas regulations.
• Be sure to perform works such as additional
refrigerant charging and pipe welding under the
conditions of good ventilation.
• Be sure to perform welding and piping works for
mechanical connections under the conditions that the
refrigerant does not circulate.
• When reconnecting the pipes, make sure to perform
flared-jointing newly to prevent refrigerant leakage.
• When working on the refrigerant pipes and the flexible
refrigerant connectors, be careful that they are not
damaged physically by surrounding objects.
• For installation with handling the R-32 refrigerant,
use the special tools for the R32 refrigerant (manifold
gauge, vacuum pump, charging hose, etc.).
• During tests never pressurize the appliances with
a pressure higher than the maximum allowable
pressure(as indicated on the nameplate of the unit).
• Never directly touch any accidental leaking refrigerant.
This could result in severe wounds caused by frostbite.
• Never install a dryer to this unit in order to guarantee
its lifetime.
3
Uneven
Cracked
Thickness
19
English