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5
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:
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
(○: Strictly Required)
Use
R410A
R407C
Refrigerant
Pipe
Pipe Cutter
Chamfering
Reamer
■
■
─
Cutting Pipe
Removing Burrs
Flaring Tool
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*The flaring tools for R107C are applicable 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
available.
Use elbow for bend and braze.
Bending
Expanding Tool
■
■
*In case of hard temper pipe, expanding of tube is
not available. Use socket for connecting tube.
Expanding Tubes
Torque Wrench
●
■
*For 12.7mm D., 15.88mm D., wrench size is the
same.
Connection of Flare 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
Oxidation during Brazing
Lubricating
Oil (For Flare
Surface)
●
★
Use a synthetic oil which is equivalent to the oil
used in the refrigeration cycle.
Synthetic oil absorbs moisture quickly.
Applying Oil to the
Flared Surface
Vacuum
Drying
Refrigerant
Charge
Refrigerant
Cylinder
●
★
*Check refrigerant cylinder color.
○Liquid refrigerant charging is required regarding
zeotropic refrigerant.
Refrigerant Charging
Vacuum Pump
■
■
○It is required to mount a vacuum pump adapter
(check valve) to prevent oil of the vacuum pump
from being pulled when the vacuum pump stops.
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
types of refrigerant oil. (If used, 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 weight 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.