■
:
Interchangeability is available with current
R22
●
: Only for Refrigerant R410A (No Interchangeability with R22)
▼
: Prohibited
★
: Only for Refrigerant R407C (No Interchangeability with R22)
Measuring Instrument and Tool
Interchangeability
with R22
Reason
of Non-Interchangeability and Attention
(○: Strictl
y Required)
Use
R410A R407C
Refrigerant
Pipe
Pipe Cutter,
Chamfering
Reame
■ ■
-
Cutting Pipe
Removing Burrs
Flaring Tool
■
■
* The flaring tools for R407C are applicab
le to R22.
* If using flaring tube, make dimension of tube
larger for R410A.
* In case of hard temper pipe, flaring is not
available.
Flaring for Tubes
Extrusion
Adjustment Gauge
●
-
Dimensional Control
for Extruded Portion of
Tube after Flaring
Pipe Bender
■ ■
* In case of hard temper pipe, bending is not
availabl
e.
Use elbow
for
b
end
and
braze.
Bend
ing
Expanding Tool
■ ■
* In case of hard temper pipe, expanding of tube is
not available. Use socket for connecting tube.
Ex
panding Tubes
Torque Wrench
● ■
* For 12.7mm D., 15.88mm D., wrench size is up
2mm.
Connection of F
lare Nut
■ ■
* For 6.35mm D., 9.52mm D., 19.05mm D., wrench
size is the same.
Brazing Tool
■ ■
* Perform correct brazing work.
Brazing
for Tubes
Nitrogen Gas
■ ■
* Strict control against pollution (Blow nitrogen
during brazing.)
Prevention from Oxid
ation
during Brazing
Lubrication Oil (for
Flare Surface)
● ★
Use a sy
nthetic
oil w
hich
is
equ
ivalent
to
the
oil
used
in the refrigeration cycle.
Synthetic oil absorbs moisture quickly.
Applying Oil to the Flared
Surface
Vacuum
Drying
l
Refrigerant
Charge
Refrigerant
Cylinder
● ★
* Check refriger
ant c
y
linder color.
○ Liquid refrige
r
ant
charging
is
required
regard
i
ng
zeotropic refrigerant.
Refrigerant Charging
Vacuum Pump
■ ■
○ It is required to mount a vacuum pump adapter
(check valv
e) to prevent oil of the vacuum pump
from being pulled when the vacuum pump stop
s.
Vacuum Pumping
Adapter for
Vacuum Pump
Check Valve
※
●
★
Manifold Valve
● ★
○ Use manifold and charging hoses designed
for
each refrigerant as design pressure is different. Do
not share manifold and charging hoses with other
refrigerant type to prevent mixing of different type of
refrigerant oil. (If use, it may cause cycle choking or
compressor failure.)
Standard of Connection Diameter; R410A: UNF1/2,
R407C: UNF7/16.
Vacuum Pumping,
Vacuum Holding,
Refrigerant Charging and
Check of Pressures
Charging Hose
● ★
Charging Cylinder
▼ ▼
* Use the w
eight scale. -
Weight Scale
■ ■
-
Measuring Instrument for
Refrigerant Charging
Refrigerant Gas
Leakage Detector
※● ★
* Use a detector designed for each refrigerant as
detecting method is different.
Gas Leakage Check
※: Interchangeability with R407C.
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