linesets

[pima67]

Not to fan the flames in the other HVAC thread!
Can one upgrade the entire system/equipment from the SEER from 30 to 80 and not need to replace the line set (assuming it is in good condition)?

 

[danski0224]

80?

 

[whateg01]

80?

It's REALLY good!

 

[bob smith1]

SEER or EER has nothing to do with the lineset. If sized right and in solid condition, it's fine. What the frig.

 

[fitter30]

Old line sets would want to flush to clean out existing oil and any debris.

 

[aggie113]

Not sure what you're asking about SEER-wise, but if you are going like for like in tonnage then probably will be good with the old line and their size. My old 3 ton unit (13 SEER) was replaced and it had lines that were buried (pier and beam house). The line size was compatible with the new unit (21 SEER) and besides having to get a ground hole bored out just for the heat pump due to AC run not having a ground (and also being buried) there was not much the tech did besides cleaning, extending slightly and re-insulating the parts of the line exposed to the old line set.

 

[paulsomlo]

80 SEER? Let me know when you get this figured out - I want in!

 

[todd_fuller]

Lineset needs to match you coil and condenser. A lot of split system have similar size line set, might be different if you go from a 1.5ton to a 5 ton. This will be in the data sheet for whatever unit you're looking at. You might need a different size if you change refrigerants as well.

 

[pima67]

Reason for the question" one lineset is "buried" in the house framing. and would be ***** to replace. Don't figure would need to up the "tonnage" since all work well now cooling wise. From what I've red very different refrigerant is now standard.

 

[mm08822]

Reason for the question" one lineset is "buried" in the house framing. and would be ***** to replace. Don't figure would need to up the "tonnage" since all work well now cooling wise. From what I've red very different refrigerant is now standard.

Somebody needs to measure ids of suction and liquid lines. Are they correct for the new system or what compensation may be needed.
Length of lines....at least a carefully measured estimate of length. (Needed to adjust overall assembled system charge properly.).
Get the manuals for the ac unit and evap coil to determine.

Pressure test above max indicated operating pressure for the lines (only) before anything else above is done. If the lines fail, now is the time to find out before new system is attached to them.

Then flush them if above checks shows usable before connecting equipment on each end of them.