Correct. The lines come with both ends flared and the b-nuts on the tube. Both lines are insulated and need to be, unlike a normal central split system where only the vapor line is normally insulated. I forgot to mention that the 5/16 in adapter fits a standard 1/4 inch hose fitting. Vapor and liquid are correct terminology but "high-side" and "low side" is wrong because (with expansion devices in the outdoor unit) both refrigerant lines are at the same pressure (low for cooling and high for heating).
The outdoor unit has two service valves where the flared refrigerant lines attach. After evacuating the lines and indoor unit you open those valves to release the R410a. The larger one also has the fitting for the 5/16 charging adapter. As someone noted, R410a systems run at much higher pressure than R22 or R12. The indoor unit includes short refrigerant lines that you poke through the big hole when you mount the indoor unit to the bracket. Typically you carefully fold these lines (on the outside) against the building. The other end of lineset attaches to these pigtails. -----Original Message----- From: Mercedes On Behalf Of Dan Penoff via Mercedes Sent: Sunday, June 28, 2020 4:25 PM To: Okie Benz <mercedes@okiebenz.com> Cc: Dan Penoff <d...@penoff.com> Subject: Re: [MBZ] OT - Mini Split AC Units So do you have to flare the line set no matter what? In other words, is the line set not already flared with the fittings in place for the provided length? Presuming that if it was and you wanted it shorter you would cut it down to length and move the fittings while doing so. -D > On Jun 28, 2020, at 4:12 PM, Scott Ritchey via Mercedes > <mercedes@okiebenz.com> wrote: > > Cutting and flaring is not that big a deal but use a tubing cutter (not a > hack saw) and a decent flare tool (not a bargain bin tool). If you hire a > pro he'll have the right tools and it only takes a few minutes. Do bend the > lines slowly and carefully so they don't kink. The outside unit doesn't > vibrate much but it will vibrate so route lines in a way they can absorb > vibration. > > -----Original Message----- > From: Mercedes On Behalf Of Kaleb Striplin via Mercedes > Sent: Sunday, June 28, 2020 10:43 AM > To: Mercedes Discussion List <mercedes@okiebenz.com> > Cc: Kaleb Striplin <ka...@striplin.net> > Subject: Re: [MBZ] OT - Mini Split AC Units > > Maybe instead of looping it you can just move the outside unit down the wall > a few feet to take up the extra length? > > Sent from my iPhone > >> On Jun 28, 2020, at 8:42 AM, Mitch Haley via Mercedes >> <mercedes@okiebenz.com> wrote: >> >> On Sun, June 28, 2020 8:43 am, dan--- via Mercedes wrote: >> >>> >>> On thing I wondered about: If I get a pre-made line set that’s >>> slightly longer than what I need, does it matter if I just looped it >>> to take up the slack rather than have to cut and flare? >> >> It shouldn't, although some possibility of oil trapping in the loop >> might be there. Many units have a 15' minimum on line length, it >> might pay to download and read the install manual before you order the >> lineset. >> >> _______________________________________ >> http://www.okiebenz.com >> >> To search list archives http://www.okiebenz.com/archive/ >> >> To Unsubscribe or change delivery options go to: >> http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com >> > > > _______________________________________ > http://www.okiebenz.com > > To search list archives http://www.okiebenz.com/archive/ > > To Unsubscribe or change delivery options go to: > http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com > > > > _______________________________________ > http://www.okiebenz.com > > To search list archives http://www.okiebenz.com/archive/ > > To Unsubscribe or change delivery options go to: > http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com > _______________________________________ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com _______________________________________ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
