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Manifold Valve
●
Charging Hose
●
Prohibited
Charging Cylinder
Weight Scale
○
Refrigerant gas
※●
leakage detector
(4)
The piping and connection parts, use the following R410A, Flare nut and the front part of pipe flare size also changes,
according to the following specifications used.
●Pipe Thickness Selected
With the design pressure changes, the pipe thickness and material should also be changed.
New Refrigerant Piping Thickness(mm)
Pipe Size
Φ6.35
Φ9.53
Φ12.7
Φ15.88
Φ19.05
Φ22.2
Φ25.4
Φ28.6
Φ31.75
Φ38.1
●Selection of Joints
As the Design pressure changes, the connection pipe (elbow etc.) thickness are also change. When using 1/2H
material, the bending and flaring can not be processed, so please follow the table below to choose the minimum
thickness that appropriate to the connecting pipe. Please note that there are several changes in flare nut size.
Connection minimum thickness (mm)
Pipe Size
R407C、R22
Φ6.35
Φ9.53
Φ12.7
Φ15.88
Φ19.05
Flare nut size B (mm)
Pipe Size
R407C、
Φ6.35
Φ9.53
Φ12.7
No interchangeability is available due to higher pressure when
compared with R22.
■
R410A connection diameter：1/2 UNF
R407C connection diameter：7/16 UNF
◎<Do not use current ones (R22) to the different
refrigerant>; if used, mineral oil will flow into the cycle and
■
cause sludge, resulting in clogging or compressor failure.
○
The current gas leakage detector (R22) is not applicable due
■
to different detection method.
Pipe Size
Φ d
6.35
9.53
12.7
15.88
19.05
※Please use the attached flare connecting pipe.
Existing Type
R22
Thickness
Material
0.6
O
0.8
O
0.8
O
1.0
O
1.0
O
1.2
O
1.2
O
1.4
O
1.4
O
1.65
O
R410A
0.5
0.5
0.6
0.6
0.7
0.7
0.8
0.8
0.8
0.8
Flare Nut Size B(mm)
R410A
R22
17
17
22
22
24
26
R407C、R22
9.0
13.0
16.2
19.4
23.3
New Refrigerant
R407C
Thickness
Material
0.8
O
0.8
O
0.8
O
1.0
O
1.0
O
1.15
O
1.0
1/2H
1.0
1/2H
1.1
1/2H
1.15
1/2H
Pipe Size
R407C、R22
Φ22.2
0.9
Φ25.4
0.95
Φ28.6
1.0
Φ31.75
1.05
Φ38.1
1.25
Flare Nut Size B(mm)
Pipe Size
R407C、
R22
Φ15.88
27
Φ19.05
36
4
Vacuum
Pumping;
Vacuum holding;
refrigerant
charging and
pressure check
Refrigerant Charging
Measuring instrument
for refrigerant charging
Gas leakage
check
Unit：mm
A Size
+0
-0.4
R410A
9.1
13.2
16.6
19.7
※Cannot be process
(1/2H material)
R410A
Thickness
Material
0.8
O
0.8
O
0.8
O
1.0
O
1.0
1/2H
1.0
1/2H
1.0
1/2H
1.0
1/2H
1.1
1/2H
1.35
1/2H
R410A
0.9
Flare Nut
0.95
1.0
1.1
1.35
R410A
29
36
Pipe
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