Problem with Split Type Pipe Length

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kitoyski Participant Join Date: Jun 2011 Posts: 4	Problem with Split Type Pipe Length 07/01/2011 5:25 AM
	hey guys i just want to ask what is the maximum length for a 3 tr, 5 tr and a 7.5 tr split unit?! it is feasible to relocate the accu for a height of 15 - 20 meters?! thanks
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Anonymous Poster #1	#1 Re: PROBLEM WITH SPLIT TYPE PIPE LENGTH 07/01/2011 5:27 AM
	20mm, 22mm, 27mm, yes.
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Tornado Guru Join Date: May 2009 Location: Richland, WA, USA Posts: 21017 Good Answers: 795	#2 Re: Problem with Split Type Pipe Length 07/01/2011 10:48 PM
	This does not particularly depend on the capacity of the unit, but much more on the height difference between evaporator and compressor/condenser. If the evaporator is higher, the issue is pressure drop in the liquid line. If the compressor/condenser is higher, the issue is oil return up the suction line. Please describe more specifically. __________________ In vino veritas; in cervisia carmen; in aqua E. coli.
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kitoyski Participant Join Date: Jun 2011 Posts: 4	#3 In reply to #2 Re: Problem with Split Type Pipe Length 07/01/2011 11:57 PM
	Tanx for your comment, My problem is that it is feasible or applicable to relocated the condensing unit on higher placed from the fan coil approximately 15 t0 20 meters?! what is the proper size of pipe should i used? Thank you.
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Stedou73ish Guru Join Date: Apr 2008 Location: 38th Parallel Posts: 750 Good Answers: 19	#4 In reply to #3 Re: Problem with Split Type Pipe Length 07/03/2011 2:09 PM
	What is the type of refrigerant you are using? This will also determine your pipe size since all refrigerants have different flow rates and abilities to carry back oil. 22 larger 410a 30% smaller than 22 with a higher coil superheat, and a lousy refrigerant for oil carrying velocities. __________________ To be or not to be........ok that's a trick question.
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kitoyski Participant Join Date: Jun 2011 Posts: 4	#5 In reply to #4 Re: Problem with Split Type Pipe Length 07/03/2011 10:21 PM
	Thanks for the comment For the refrigerant i will use R-22. Can i know what is the proper size of pipe in this situation?! Thank you again
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Stedou73ish Guru Join Date: Apr 2008 Location: 38th Parallel Posts: 750 Good Answers: 19	#6 In reply to #4 Re: Problem with Split Type Pipe Length 07/04/2011 8:34 AM
	OK it is not that easy, there are still some variables to know. What is the actual tonnage of the system in your OP you list a few. What is the length of the run? How many 90 degree bends are there, add about 2.5 feet per 90 for total pipe length. As Tornado stated is the condensing unit located above the evaporator or below? Are there long vertical or horizontal runs, this could introduce the need for inverted traps and velocity risers or 1/8 inch to the foot slope to the compressor for oil flow. Most people look at inlet piping to the condensing unit and outlet from the evaporator and if you are with in 25 feet or so it will probably work. If it is longer you could have oil return issues and shortened life cycles of equipment. Take some time to read the attached and get the education before Brazing up the lines. __________________ To be or not to be........ok that's a trick question.
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Anonymous Poster (1); kitoyski (2); Stedou73ish (2); Tornado (1)

You might be interested in: Pipe Hangers and Pipe Supports, Utility Meters, Flow Meters

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