Daikin VRV Plus Series General Information Manual page 165

Si33-003.book Page 161 Monday, June 25, 2001 9:06 AM
SiE33-003
FLARE SHAPE and FLARENUT TIGHTENING TORQUE
Not recommendable but in case of emergency
You must use a torque wrench but if you are obliged to install the unit without a torque wrench, you may
follow the installation method mentioned below.
After the work is finished, make sure to check that there is no gas leak.
When you keep on tightening the flare nut with a spanner, there is a point where the tightening torque
suddenly increases. From that position, further tighten the flare nut the angle shown below:
Installation Manual
Pipe Size Tightening Torque (N·m)
φ6.4
14.2-17.2
φ9.5
32.7-39.9
φ12.7
49.5-60.3
φ15.9
61.8-75.4
φ19.1
97.2-118.6
Spanner
Piping union
Pipe size Further tightening angle
6.4 (1/4") 60 to 90 degrees
9.5 (3/8") 60 to 90 degrees
12.7 (1/2") 30 to 60 degrees
15.9 (5/8") 30 to 60 degrees
19.1 (3/4") 20 to 35 degrees
A (mm) Flare Shape
8.3-8.7
90 ±
4
12.0-12.4
A
15.4-15.8
18.6-19.0
R=0.4 0.8
22.9-23.3
Torque wrench
Flare nut
(V1348)
Recommended arm length of tool
Approx. 150mm
Approx. 200mm
Approx. 250mm
Approx. 300mm
Approx. 450mm
: http://splitoff.ru/tehn-doc.html
Before Operation
(V0905)
161