Fujitsu ABYA12-24LBTH 설치 매뉴얼 - 페이지 7
{카테고리_이름} Fujitsu ABYA12-24LBTH에 대한 설치 매뉴얼을 온라인으로 검색하거나 PDF를 다운로드하세요. Fujitsu ABYA12-24LBTH 21 페이지. Vrf system indoor unit floor / ceiling type
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Thicknesses of Annealed Copper Pipes (R410A)
Pipe outside diameter [mm (in.)]
6.35 (1/4)
9.52 (3/8)
12.70 (1/2)
15.88 (5/8)
19.05 (3/4)
1
4.2. Pipe requirement
CAUTION
• Refer to the Installation Manual of the outdoor unit
for description of the length of connecting pipe or for
difference of its elevation.
•
Use pipe with water-resistant heat insulation.
CAUTION
• Install heat insulation around both the gas and liquid
pipes. Failure to do so may cause water leaks.
Use heat insulation with heat resistance above 120 °C.
(Reverse cycle model only)
In addition, if the humidity level at the installation location
of the refrigerant piping is expected to exceed 70 %,
install heat insulation around the refrigerant piping.
If the expected humidity level is 70-80 %, use heat
insulation that is 15 mm or thicker and if the expected
humidity exceeds 80 %, use heat insulation that is 20
mm or thicker. If heat insulation is used that is not as
thick as specifi ed, condensation may form on the surface
of the insulation.
In addition, use heat insulation with heat conductivity of
0.045 W/(m·K) or less (at 20 °C).
1
4.3. Flare connection (pipe connection)
4.3.1. Flaring
• Use special pipe cutter and fl are tool exclusive for R410A.
(1) Cut the connection pipe to the necessary length with a
pipe cutter.
(2) Hold the pipe downward so that cuttings will not enter the
pipe and remove any burrs.
(3) Insert the fl are nut (always use the fl are nut attached to
the indoor and outdoor units respectively) onto the pipe
and perform the fl are processing with a fl are tool. Use the
special R410A fl are tool, or the conventional fl are tool.
Leakage of refrigerant may result if other fl are nuts are
used.
(4) Protect the pipes by pinching them or with tape to prevent
dust, dirt, or water from entering the pipes.
B
Die
A
Pipe
Thickness [mm]
0.80
0.80
0.80
1.00
1.20
Check if [L] is fl ared uniformly
and is not cracked or scratched.
L
Dimension A [mm]
Pipe outside
diameter
Flare tool for R410A,
[mm (in.)]
clutch type
6.35 (1/4)
9.52 (3/8)
12.70 (1/2)
0 to 0.5
15.88 (5/8)
19.05 (3/4)
When using conventional fl are tools to fl are R410A pipes,
the dimension A should be approximately 0.5 mm more
than indicated in the table (for fl aring with R410A fl are tools)
to achieve the specifi ed fl aring. Use a thickness gauge to
measure the dimension A.
Pipe outside
Width across
diameter [mm (in.)]
fl ats
6.35 (1/4)
9.52 (3/8)
12.70 (1/2)
15.88 (5/8)
19.05 (3/4)
4.3.2. Bending pipes
•
The pipes are shaped by your hands or pipe bender. Be
careful not to collapse them.
•
Do not bend the pipes in an angle more than 90°.
•
When pipes are repeatedly bend or stretched, the material
will harden, making it diffi cult to bend or stretch them any
more. Do not bend or stretch the pipes more than 3 times.
CAUTION
• To prevent breaking of the pipe, avoid sharp bends.
• If the pipe is bent repeatedly at the same place, it will
break.
0
Dimension B
-
0.4
[mm]
9.1
13.2
16.6
19.7
24.0
Width across flats
of Flare nut [mm]
17
22
26
29
36
En-7