Daikin VRV - WII Service Manual page 300

SiUS30-604
1. Flaring tool
2 Dimension A
2 Change of dimension A
Conventional flaring tools can be used when the work process is changed.
(change of work process)
Previously, a pipe extension margin of 0 to 0.5mm was provided for flaring. For R-410A air
conditioners, perform pipe flaring with a pipe extension margin of 1.0 to 1.5mm.
(For clutch type only)
Conventional tool with pipe extension margin adjustment can be used.
Precautions for New Refrigerant (R-410A)
Flare gauge
Specifications
Tube O.D.
Nominal size
1/4
3/8
1/2 12.70
5/8 15.88
3/4 19.05
Differences
Do Class-2 (R-410A)
6.35 9.1
9.52 13.2
16.6
19.7
24.0
Dimension A
For class-1: R-407C
For class-2: R-410A
Precautions for New Refrigerant (R-410A)
+0
A
-0.4
Class-1 (Conventional)
9.0
13.0
16.2
19.4
23.3
Unit:mm
287