Samsung AJ NBLDCH Series, Руководство пользователя и инструкция по установке

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29
English
Ins
tallation
Step 5 Purging inert gas from the
indoor unit
From factory the unit is supplied and set with a pre-
charge of nitrogen gas. (inert gas) Therefore, all inert gas
must be purged before connecting the assembly piping.
Unscrew the pinch pipe at the end of each refrigerant pipe.
Result : All inert gas escapes from the indoor unit.
Gas
refrigerant port
Liquid
refrigerant port
NOTE
• The designs and shape are subject to change
according to the model.
• To prevent dirt or foreign objects from getting into
the pipes during installation, do NOT remove the pinch
pipe completely until you are ready to connect the
piping.
CAUTION
• Connect the indoor and outdoor units using pipes with
flared connections(not supplied). For the lines, use
insulated, unwelded, degreased and deoxidized copper
pipe (Cu DHP type to ISO 1337 or UNI EN 12735-1),
suitable for operating pressures of at least 4200kPa and
for a burst pressure of at least 20700kPa. Copper pipe
for hydro-sanitary applications is completely unsuitable.
• For sizing and limits (height difference, line length,
max. bends, refrigerant charge, etc.) see the outdoor
unit installation manual.
• All refrigerant connection must be accessible, in order to
permit either unit maintenance or removing it completely.
Step 6 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
90° ±2°
R 0.4 to 0.8 mm
D
L
45
°
±2
°
Outer Diameter (D) Depth (A) Flare dimension (L)
Ø6.35 mm 1.3 mm 8.7~9.1 mm
Ø9.52 mm 1.8 mm 12.8~13.2 mm
Ø12.70 mm 2.0 mm 16.2~16.6 mm
Ø15.88 mm 2.2 mm 19.3~19.7 mm
Pipe
Flare
Flare
Pipe
Pipe cutter
Oblique
Rough
Burr