22
Outdoor Unit Installation
English
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).
Pipe cutter
Pipe
Oblique Rough Burr90°
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.
Pipe
Flare
R 0.4 to 0.8
90°±2°
45°±2°
L
D
D
A
(Unit: mm)
Outer diameter
(D)
Depth (A) Flare dimension (L)
ø 6.35 1.3 8.7–9.1
ø 9.52 1.8 12.8–13.2
ø 12.70 2.0 16.2–16.6
ø 15.88 2.2 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.
To Next Page
Loading...
