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66-EN
65-EN
5
Refrigerant piping
Knockout of pipe cover
Knockout procedure
The indoor / outdoor connecting pipes can be
connected in 4 directions.
Take off the knockout part of the pipe cover through
which pipes or wires will pass through the base plate.
Detach the pipe cover and tap on the knockout
section a few times with the shank of a screwdriver.
A knockout hole can easily be punched.
After punching out the knockout hole, remove burrs
from the hole and then install the supplied protective
bush and guard material around the passage hole to
protect wires and pipes.
Be sure to attach the pipe covers after pipes have
been connected. Cut the slits under the pipe covers
to facilitate the installation.
After connecting the pipes, be sure to mount the pipe
cover. The pipe cover is easily mounted by cutting off
the slit at the lower part of the pipe cover.
* Be sure to wear heavy work gloves while working.
Optional installation parts
(Locally procured)
Rear direction
Pipe cover
Side direction
Down direction
Front direction
Parts name
Q’ty
A
Refrigerant piping
Liquid side: Ø9.5 mm
Gas side: Ø15.9 mm
One each
B
Pipe insulating material
(polyethylene foam, 10 mm thick)
1
C
h
c
a
e
e
n
O
e
p
a
t
C
V
P
,
y
tt
u
P
Supplied protective bush
Supplied passage hole
guard material
* Attach the guard material
securely so that it does
not come loose.
Refrigerant piping connection
CAUTION
Take note of these 4 important points below for
piping work.
1. Keep dust and moisture away from inside the
connecting pipes.
2. Tightly connect the connection between pipes and
the unit.
3. Evacuate the air in the connecting pipes using a
VACUUM PUMP.
4. Check for gas leaks at connection points.
Piping connection
Flaring
1
Cut the pipe with a pipe cutter.
Be sure to remove burrs that may cause a gas
leak.
2
Insert a flare nut into the pipe, and then flare
the pipe.
Use the flare nuts supplied with the air conditioner
or those for R410A.
Insert a flare nut into the pipe, and flare the pipe.
As the flaring sizes of R410A differ from those of
refrigerant R22, the flare tools newly
manufactured for R410A are recommended.
However, the conventional tools can be used by
adjusting the projection margin of the copper pipe.
Projection margin in flaring: B (Unit: mm)
Rigid (Clutch type)
Flaring dia. size: A (Unit: mm)
* In case of flaring for R410A with the conventional
flare tool, pull the tool out approx. 0.5 mm more than
that for R22 to adjust it to the specified flare size.
The copper pipe gauge is useful for adjusting the
projection margin size.
Liquid side
Outer diameter
Thickness
Ø9.5 mm
0.8 mm
Gas side
Outer diameter
Thickness
Ø15.9 mm
1.0 mm
Outer dia. of
copper pipe
R410A tool used
Conventional
tool used
R410A
1.0 to 1.5
9.5
0 to 0.5
15.9
Outer dia. of copper pipe
A
+0
–0.4
2
.
3
1
5
.
9
7
.
9
1
9
.
5
1
B
A
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