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Outdoor Unit Installation
Step 3-2 Connecting the cables and the
pipes
1
Route the piping bundle to the outdoor unit.
2
Use piping clamps to fasten the piping bundle to the
foundation or wall.
3
Cut the refrigerant pipes to the length needed to reach
the pipe connections (located behind the cover panel; see
the figure in step 7).
90°
Oblique
4
Remove any burrs, positioning the pipe face down to
make sure that the burrs do not get into the pipe.
5
Assemble the flare connections on the cut pipe ends.
D
Pipe
Flare
Outer diameter
Depth (A)
(D)
ø 6.35
1.3
ø 9.52
1.8
ø 12.70
2.0
ø 15.88
2.2
22
English
Pipe cutter
Pipe
Rough
Burr
90°±2°
A
45°±2°
L
R 0.4 to 0.8
D
(Unit: mm)
Flare dimension (L)
8.7–9.1
12.8–13.2
16.2–16.6
19.3–19.7
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.
6
Remove the cover panel on the unit.
7
Remove the service valve caps.
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