Daikin VRV II Series Design, Installation & Testing Instructions page 32

Installation
Not
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.
recommendable
but in case of
After the work is finished, make sure to check that is no gas leak.
emergency
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:
26
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
Recommended arm length of tool
Approx. 150mm
Approx. 200mm
Approx. 250mm
Approx. 300mm
Approx. 450mm
General Information
Si39-303