Replies

1. 
   seeyou | Jul 29, 2009 01:40am | #1

   Mine's a lot further than that.

   http://www.quittintime.com/      View Image     

2. 
   junkhound | Jul 29, 2009 02:17am | #2

   30 ft is no problem.

   Installed the HP/AC at sons house on far side of garage so fan/cmporessor noise could not be heard in the house, 55 feet, no problems.  4Ton, 3/4" suction, 3/8" liquid line.

   Are you DIY this job or hiring it out? 

   Make sure the lines from the inside unit go up above the top of that coil, then have a slope of about 3-4" over a 40-50 ft run to wherever they drop to the outdoor unit/ compressor.  Slope is needed for oil management.

   Make sure there is a liquid line dryer/filter just before the TXV (dont settle for an orifice device) and that when the lines are brazed they are purged with N2, CO2, or Argon before silver brazing - soldering is for amatuers or hacks.  On my own installation, I like to:

   1. pressure test to 500 psi with dry nitrogen

   2. pull a 500 micron or less vacuum overnight, then seal and watch that the vacuum does not go any higher in a few hours.

   3. Then, only after the above,  charge with refrigerant. 

   Highly doubtful if any hired help will do all the above, but they better do 1, 2 for at least and hour, and 3 (obviously) by scale plus check subcool and superheat.

   Can give you a full discussion/tutorial at the fest, see you then. 

   OH yeah, forgot to add, INSULATE the lines for best efficiency. 

   
   

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   Edited 7/28/2009 7:18 pm ET by junkhound

1. 
   etherhuffer | Jul 29, 2009 02:32am | #3

   I am going from a basement location to outside the house. Can you run the lines in large diameter conduit? I will hire it done, but I just have interest in what to ask when the contractor arrives. Lines would have to go under a sunroom being built.http://www.etherhuffer.typepad.com

1. 
   junkhound | Jul 29, 2009 10:30pm | #4

   Simply ask if he does the 3 items in the first response.

   You will likely get hit with a $$ surcharge for a txv, but IMO should be worth it in energy savings over the years.

1. 
   etherhuffer | Jul 29, 2009 10:52pm | #5

   Sounds good. Will do.http://www.etherhuffer.typepad.com

2. 
   Tim | Jul 29, 2009 11:03pm | #6

   You can run them in PVC with long sweep fitttings. It is best not to be much under grade or under a slab if possible. General, nominal line sizes are good for 50 ft runs. Longer than that, I check with the factory (me).

1. 
   etherhuffer | Jul 30, 2009 12:37am | #7

   Whatsa sweep fitting?http://www.etherhuffer.typepad.com

1. 
   junkhound | Jul 30, 2009 12:44am | #8

   sweep --- large radius like on dainage pipe vs. an elbow  --  so the Cu tube can be pulled thru, best if conduit is a straight line. 

2. 
   etherhuffer | Jul 30, 2009 12:52am | #9

   Got it. The only bend would be up and out of the basement to the outdoor level. I was thinking PVC to prevent rodent gnawing, etc.http://www.etherhuffer.typepad.com