19
English
Instal
lation Pr
oc
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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°
Oblique
Rough
Burr
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
D
45
° ±2°
90
° ±2°
Pipe
Flare
Flare
R 0.4 to 0.8 mm
L
Outer diameter (D)
Depth (A)
Flare dimension (L)
ø6.35 mm
14 to 18
8.7 to 9.1 mm
ø9.52 mm
34 to 42
12.8 to 13.2 mm
ø12.70 mm
49 to 61
16.2 to 16.6 mm
ø15.88 mm
68 to 82
19.3 to 19.7 mm
5
Check that the flaring is correct, referring to the
illustrations below for examples of incorrect flaring.
3
2
1
Correct
Inclined
Damaged
Surface
Cracked
Uneven
Thickness
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.
Содержание AJ NCJ2EG Series
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