When installing pipe through
the wall, secure a cap at the
end of the pipe.
Correct
CorrectIncorrect Incorrect
Correct Incorrect
HoleHole
Attach a cap
or vinyl tape.
Attach a cap
or vinyl tape.
Attach a cap
or vinyl bag with
rubber band.
Do not place the pipe
directly on the ground.
Rain water can
enter.
1/64 ~ 1/32R
φA
φd
90
o
+
2
o
45
o
+
2
o
Use the specied non-ammable refrigerant
(R410A) for the outdoor unit in the refrigerant
cycle. Do not charge material other than
R410A into the unit such as hydrocarbon
refrigerants (propane or something similar),
oxygen, ammable gases (acetylene or etc.) or
poisonous gases when installing, maintaining
and moving. These ammables are extremely
dangerous and may cause an explosion, a re,
and injury.
● FlaringDimension
Performthearingworkasshownbelow.
● JointSelection
Whenusing1/2Hmaterialandthearingwork
isnotavailable.Inthisinstance,useajoint
selectedfromthechartbelow.
(
T
)Itisimpossibletoperformthearing
workwith1/2Hmaterial.Inthiscase,
useanaccessorypipe(withaare).
5.1 RefrigerantPiping
● Cautions for Refrigerant Pipe Work (Example)
(1) Preparelocally-suppliedcopperpipes.
(2) Selectcleancoppertubesmakingsurethere
isnodustormoistureinsidethetubes.
Beforeconnectingpipes,blowtheinsideof
thetubeswithnitrogenordryair,toremove
anydustorforeignmaterials.
(3) Selectthepipingsizeasshowninthetables
below.Furthermore,checkfortheare
nutandaringdimensionaccordingtothe
followinggureandtable.
5. Refrigerant Piping Work
NOTE:
Donotuseajointotherthanthosespeciedin
thetableabove.
B
Flare Nut
inch(mm)
Diameter
(ɸd)
A
+0
-0.4(-0.02)
R410A
6.35 (1/4) 9.1 (0.36)
9.52 (3/8) 13.2 (0.52)
12.7 (1/2) 16.6 (0.65)
15.88 (5/8) 19.7 (0.78)
19.05 (3/4) (
T
)
MinimumThicknessofJoint
mm(inch)
Diameter R410A
6.35 (1/4) 0.5 (0.020)
9.52 (3/8) 0.6 (0.024)
12.7 (1/2) 0.7 (0.028)
15.88 (5/8) 0.8 (0.031)
19.05 (3/4) 0.8 (0.031)
22.2 (7/8) 0.9 (0.035)
25.4 (1) 0.95 (0.037)
28.58 (1-1/8) 1.0 (0.039)
31.75 (1-1/4) 1.1 (0.043)
38.1 (1-1/2) 1.35 (0.053)
41.28 (1-5/8) 1.45 (0.057)
FlareNutDimensionB mm(
inch)
Diameter R410A
17 (11/16)
22 (7/8)
26 (1)
29 (1-1/8)
6.35 (1/4)
9.52 (3/8)
12.7 (1/2)
15.88 (5/8)
19.05 (3/4) 36 (1-7/16)