Daikin VRV III, Руководство по обслуживанию, Страница: 554 / 567

SiUS34-801A_b Precautions for New Refrigerant (R-410A)
Precautions for New Refrigerant (R-410A) 539
1. Flaring tool
Specifications
2
Dimension A
Differences
2
Change of dimension A
Conventional flaring tools can be used when the work process is changed. Previously, a pipe
extension margin of 0 to 0.5/32mm was provided for flaring. For R-410A air conditioners, perform
pipe flaring with a pipe extension margin of 1/32 to 1.5/32mm.
l For clutch types only, a conventional tool with pipe extension margin adjustment can be used.
Flare gauge
Nominal size
1/4
3/8
1/2
5/8
3/4
Tube O.D.
Do
6.35
9.52
12.70
15.88
19.05
Class-2 (R-410A)
9.1/32
13.2/32
16.6/32
19.7/32
3/4
Class-1 (Conventional)
9.0/32
13.0/32
16.2/32
19.4/32
23.3/32
+0
-0.4
Unit:mm
A
Dimension A
For class-1: R-407C
For class-2: R-410A