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English
Cutting/Flaring the pipes
1. Make sure that you have the required tools available. (pipe cutter, reamer, flaring tool and pipe holder)
2. If you wish to shorten the pipes, cut it with a pipe cutter, taking care to ensure that the cut edge remains at a 90° angle
with the side of the pipe. Refer to the illustrations below for examples of edges cut correctly and incorrectly.
Oblique
Rough
Burr
3. To prevent any gas from leaking out, remove all burrs at the cut edge of the pipe, using a reamer.
4. Slide a flare nut on to the pipe and modify the flare.
Outer Diameter (D)
Depth (A)
ø6.35 mm(1/4")
1.3 mm
ø9.52 mm(3/8")
1.8 mm
ø12.70 mm(1/2")
2.0 mm
ø15.88 mm(5/8")
2.2 mm
ø19.05 mm(3/4")
2.2 mm
5. Check that the flaring is correct, referring to the illustrations below for examples of incorrect flaring.
Uneven
Thickness
Cracked
Damaged
Surface
Inclined
Correct
6. Align the pipes and tighten the flare nuts first manually and then with a torque wrench, applying the following torque.
Valve
Flare nut
Valve cap
Pressure port cap
Valve needle
Pressure port
Wrench(mm) N•m Wrench(mm) N•m Wrench(mm) N•m Wrench(mm) N•m Wrench(mm) N•m
1/4"
17
18
23
20
18
16~18 Allen(hex.) 5
9
-
0.34
3/8"
22
42
23
20
18
16~18 Allen(hex.) 5
9
-
0.34
1/2"
26
55
29
40
18
16~18 Allen(hex.) 5
13
-
0.34
5/8"
29
65
29
40
18
16~18 Allen(hex.) 5
13
-
0.34
3/4"
36
100
38
40
18
16~18 Allen(hex.) 5
13
-
0.34
• If the pipes require brazing ensure that OFN(Oxygen Free Nitrogen) is flowing through the system.
• Nitrogen blowing pressure range is 0.02 ~ 0.05MPa.
CAUTION
Summary of Contents for AC-505CM Series
Page 38: ......
