Mini-Split line set question
 

I need to mount the inside unit on the East wall about 10' from the corner. I want to put the outdoor unit on the North all about 5' from the corner. I have plenty of room to run the lines above the ceiling. I just don't know how hard it is to make the turns? Will I have a problem?

The drain from the in-door unit can go out right behind it (on the east wall). I just don't want to put the outside unit there. Can the drain go one way and the copper line set a different way?

thanks
Austin

Yes the drain and the line set can go in different directions. always keep in mind water runs down hill only so you can avoid a pump.

I will let more experienced people answer the rest.

There is a technique to bending line set tubes. It must be posted here some wheres.
The important part is to take your time and go slow.

I dropped my drain hose out of the plastic channel, so the water wouldn't drain on the slab.
http://i46.photobucket.com/albums/f1...r/NCL/F110.jpg

Up here in MA, the amount of water flowing during the summer is minimal.
One thing to watch out for is wasps climbing into the hose a making themselves at home..

In my second install, I just dumped the water on the ground under the Den..
http://ecorenovator.org/forum/geothe...-2011-a-2.html
No water draining out of the area has been visible since the 2011 install.
Did see a wet spot under there on a hot day in August..

Sounds like it is doable.

The drain might go out right behind the indoor unit, but the line set will go straight up and into the floor trusses to go out a different wall.

Manual Defrost Mode
 

I was worried about my Den Sanyo drain hose freezing up..
It's only 1/4" ID hose.. http://ecorenovator.org/forum/16535-post6.html

Because, when it's really cold and frosty on the HX, I will set the Sanyos
to Dehumidifier mode, to transfer some heat to the outdoor HX, to melt the ice.

So, while in Dehumidifier mode I expected some water would accumulate
indoors and drain outside into the 10F hose and freeze up the 1/4" hose.

Which should lead to water dripping out of the pan and down the wall indoors..?.
Nope, that has never happened..

Manual Defrost Mode doesn't make a mess.. :)

I am not a pro , but I have been told the refrigeration oil flows along with the refrigerant and MUST return to the condenser .

Therefore , plan your line set run so the oil can flow back to the condenser unit . I have seen installations that had the condenser on the roof , serving a fan coil in the space below . In extreme cases , the installer constructed some thing that looked like a " P-Trap " in the copper tubing .

The explanation was , the trap would fill with oil & when it was gull , the suction would suck the oil up to the condenser .

These were cool only , so the " P-Trap " was only in the suction / larger copper tubing . Since many / most mini splits are A/C - HP units , I do not know if you would need to trap both lines ?

Since most / all of the mini split line sets are soft / flexible tubing , if you needed a trap , I think you might could make a vertical loop where the line set entered the attic ? Provided you gave adequate vertical space in the attic .

From the look , try to slope the line set downward across the attic and down / out the other wall , to the mini split condenser .

If the rise to the attic is minimal , all this may not be necessary ?

Hopefully a pro will comment on the point I have raised .

And , bend the copper tube slowly / carefully and in as a large a turning radius as feasible . DO NOT KINK the copper tubing ! :-(

God bless
Wyr