32
12.2.5 Connect the Piping
12.2.5.1 Connecting
the Piping to Indoor
12.2.5.2 Connecting
the
Piping to Outdoor
Decide piping length and then cut by using pipe cutter.
Remove burrs from cut edge.
Make flare after inserting the flare nut (locate at valve)
onto the copper pipe. Align center of piping to valve
and then tighten with torque wrench to the specified
torque as stated in the table.
Do not overtighten, overtightening may cause gas leakage.
Piping size
Torque
6.35 mm (1/4")
[18 N•m (1.8 kgf•m)]
9.52 mm (3/8")
[42 N•m (4.3 kgf•m)]
12.7 mm (1/2")
[55 N•m (5.6 kgf•m)]
15.88 mm (5/8")
[65 N•m (6.6 kgf•m)]
19.05 mm (3/4")
[100 N•m (10.2 kgf•m)]
12.2.5.3 Cutting
and
Flaring the Piping
1 Please cut using pipe cutter and then remove the burrs.
2 Remove the burrs by using reamer. If burrs is not removed, gas leakage may be caused. Turn the piping end
down to avoid the metal powder entering the pipe.
3 Please make flare after inserting the flare nut onto the copper pipes.
For connection joint of all model (except R32 model)
Please make flare after inserting flare nut (locate at joint
portion of tube assembly) onto the copper pipe. (In case of
using long piping)
Connect the piping
•
Align the center of piping and sufficiently tighten the flare
nut with fingers.
•
Further tighten the flare nut with torque wrench in
specified torque as stated in the table.
Torque
wrench
Spanner or
Wrench
Additional Precautions For R32 Models when connecting by flaring at indoor side
Ensure to do the re-flaring of pipes before connecting to units to avoid leaking.
Seal sufficiently the flare nut (both gas and liquid sides) with neutral cure (Alkoxy type) & ammonia-free
silicone sealant and insulation material to avoid the gas leak caused by freezing.
Apply neutral cure
(Alkoxy type) and
ammonia-free silicone
sealant along the
circumference
Neutral cure (Alkoxy type
) & ammonia-free silicone sealant is only to be applied after
pressure testing and cleaning up by following instructions of sealant, only to the outside of the
connection. The aim is to prevent moisture from entering the connection joint and possible
occurrence of freezing. Curing sealant will take some time. Make sure sealant will not peel off
when wrapping the insulation.
When properly fl
a
red, the intern
a
l
su
rf
a
ce of the
fl
a
re will evenly
s
hine
a
nd
b
e of even thickne
ss
.
S
ince the fl
a
re p
a
rt come
s
into cont
a
ct with the
connection
s
, c
a
ref
u
lly check the fl
a
re fi ni
s
h.
Improper fl
a
ring
Inclined
Su
rf
a
ce
d
a
m
a
ged
Cr
a
cked Uneven
thickne
ss
1. To c
u
t
2. To remove
bu
rr
s
3
. To fl
a
re
B
a
r
Red
a
rrow m
a
rk
H
a
ndle
Core
Yoke
Cl
a
mp h
a
ndle
B
a
r
0 – 0.5 mm
Copper pipe
Re
a
mer
Point down
Pipe
