Mini Split Install Question - Lineset Length

[orion0314]

Hello,

I recently was in the process of tightening my air handler side lineset connections with a click torque wrench and the wrench never made the click sound. As a result I over tightened the liquid line and ruined the liquid line copper flare. With this said, I have two questions:

1) My suction line is cut to just over 10 ft., I have a spare liquid line that is 15 ft. Is it okay for the lines to be two different lengths?

2) I am using a 3/8" to 1/2" adapter on the torque wrench that allows me to connect the wrench head to fit the suction line hex nut. Is there something that I need to know in terms of figuring extra or less torque due to the use of the adapter?

Very much appreciate any assistance.

 

[kbeefy]

3/8-1/2 adapter doesn't really change anything.
Angle of the tq wrench and effective angle is most important.

 

[fastjohnny]

Minor variation in length I don't see an issue. Why not just cut and reflare?

 

[CoopVA]

I'd cut and flare it to match the other...

 

[AirSchatz]

Shouldn't be an issue, but I would make the lengths match.

 

[Champ128]

No issues what so ever with the lengths. It's fine.

 

[hedgehog]

You will want to torque at 90 degrees or calculate a lower torque

 

[bzinsky]

Just installed 20 mini splits a few months ago, hired a pro to make the connections, he said using the flares and nuts on the linesets was fine. "They are perfectly machine flared" he said.

About 1/2 of the connections leaked, I went back and flared them myself using the manufacturers flare nut. I even tried tightening them down more and the leak wouldn't stop unless you severely over torqued them.

Point of my story - you should be cutting them and re-flaring them anyway.