Maximum Lenth of Liquid and Suction Line?

[ak_47_boy]

Hi, i would like to relocate my phase change compressor and condenser outside. Where i would like it is about 30' from my computer, is this possible? The best i can do it 8' but it will be in a bad place. What would i use for a liquid line?

Also, can i put my condenser in with my central air condenser?

[quintus]

Hi, i would like to relocate my phase change compressor and condenser outside. Where i would like it is about 30' from my computer, is this possible? The best i can do it 8' but it will be in a bad place. What would i use for a liquid line?

Also, can i put my condenser in with my central air condenser?

i'm instaling AC atmand the usual kit is 3m. long max is about 9m depending also on the strenght of the unit. biger means that u can place it far away, but that would be above 24000btu witch is nonsens for us unles u cool few servers.

i plan on doing the same thing unit outside on the balcony and the rest inside

good luck and give us some fotos when u are ready!

[Xeon th MG Pony]

1/4 liquid (For less then 10' I'd go a size lower to try and keep the charge down) and 3/8 suction, 20 feet max with out any complex issues. You will of course have to correct the charge and re-tune it.

You are all so going to run into a fun problem called refrigerant migration, where it all will dissolve into the oil and promptly kill the compressor on restart! Thus you either will need to use a pump down cycle or a crank case heater, and you will possibly need to implement head pressure controls for low ambient conditions, such as a fan cycling system.

I'm afraid it isn't as simple as putting it out side and forgetting it!

[Stigma]

I have a custombuilt unit with 4meters suctionline. it works fine, but has a long pulldown time. other than this, performance does not seem to suffer significantly compared to comparable units with many times shorter suctionlines.

I have no idea what would happen at 10 meters tho... ^_^

I placed mine behind a wall instead of outside hehe... no noise phase-cooling for the win! =)

-Stigma

[Xeon th MG Pony]

Ah yes I forgot to mention you will have to insulate the suction line very well to maintain performance, correct the charge via super heat and subcooling will yeild best results.

[one_servant]

Yeah, I've always thought it would be fun to hook up one of these outside for condesning and compressing. I wouldn't care how loud the rotory pump was if it was outside! :)

http://www.marcclimatic.com/products/images/Mini-Split_C_series_Cond_Unit_130_pix.jpg

[Xeon th MG Pony]

But your neighbours would, and thats enforceable via bylaws!

[one_servant]

That would be assuming I have neighbors close enough to be annoyed by the sound. Besides, these units are quieter than my 5 ton heat pump that I use to heat and cool my house. The one I have my eye on for my computer is 9,000BTUs.

[ak_47_boy]

Thanks for all the help!

I assume running propane lines threw walls and the floor is a bad idea, especially with such a high charge.

Xeon, at what temperature does refrigerant migration happen?

[one_servant]

I assume running propane lines threw walls and the floor is a bad idea, especially with such a high charge.

Armored lines anyone? :up:

[[XC] gomeler]

Well I have propane lines running through the floors in my house for my waterheater and I haven't had any explosions yet, house is still standing since it was built in the 70's :up:

[Xeon th MG Pony]

refrigerant migration occurs when ever there is a slight temperature difference between the evap and condensing unit, it will travel to where ever the temp is coolest, a very small delta will drive this migration, to protect the condensing unit it must all ways be warmer then the evap during off times.

All so with long piping runs you may need to now consider an accumulator on your suction line to protect against slugging that may now have a better chance of occurring.

Properly plumbed gas lines are perfectly safe, just follow proper code and you shant need to worry.