Quote:
Originally Posted by AustinChief
Split system. Air handler inside with evap/coils and then I'd guess about 25 ft of line (3/8 and 7/8 does that sound right?) running outside to heat pump.
Inside coils have the leak.
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if its a really old system your evap coil might be on the supply air side, if it's fairly new even within 20 yr the evap coil should be in the return air side. that being said you could replace the evap coil in the air handler. not knowing brand i would guess that the coil could run anywhere between 275 to 425. plus near to 5-8lb of r-22 depending on tonnage if its all leaked out. maybe 4 to 6 hr in lbr. 22 could be $20+ per lb now, lbr rates for that area may be well higher than $60 per hr. you could be pushing $1000 for just that.
the condensor you speak of changing is the outside unit, you don't convert a condensing unit from 22 to 410a. a/c or heat pump you change the unit, which also means you change the a-coil, which in this case prolly means the air handler. the line set can be left and flushed if its been brazed, if its been stay bright soldered best to change it too as 410 pressures are well higher than 22. on a hot day your liquid side could push toward 500psi; wouldn't trust stay bright.
unfortunately you're prolly lookin at a sysyem change out.the only other option if you want a newer outside unit is to see about a dry 22 unit, then go a coil and ht pmp if it's available.
that's my 2 cents worth anyways.