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Installation Procedure
CAUTION
• 3 m as minimum pipe length: It will reduce noise and
vibration.
• Tighten the nuts to the specified torques.
If overtightened, the nuts could be broken so
refrigerant may leak.
• Protect or enclose refrigerant tubing to avoid
mechanical damage.
NOTE
• The appearance of the unit may be different from the
diagram depending on the model.
• You can use the Cool and Heat modes in the following
conditions :
Mode
Outdoor
-10 °C to 46 °C
temperature
It could take maximum 60 minutes to operate for
the protection of the compressor,if the outdoor
temperature is below -5°C.
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°
English
20
Cool
Heat
-15 °C to 24 °C
Burr
Oblique
Rough
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
Pipe
Flare
Outer diameter
Depth
(D)
ø6.35 mm
14 to 18
ø9.52 mm
34 to 42
ø12.70 mm
49 to 61
ø15.88 mm
68 to 82
5 Check that the flaring is correct, referring to the
illustrations below for examples of incorrect flaring.
1
2
Correct
Inclined
CAUTION
• Keep the piping length at a minimum to minimize
the additional refrigerant charge due to piping
extension.
• When connecting the pipes, make sure that
surrounding objects do not interfere with or contact
them to prevent refrigerant leakage due to physical
damage.
R 0.4 to 0.8 mm
L
Flare
Flare dimension
(A)
(L)
8.7 to 9.1 mm
12.8 to 13.2 mm
16.2 to 16.6 mm
19.3 to 19.7 mm
3
Uneven
Damaged
Cracked
Surface
Thickness
D
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