I have a similar question as the original poster in this thread: http://hvac-talk.com/vbb/showthread.php?p=13078631 .
I have a split system, and need to replace my condenser unit. This system and house is about 20 years old, and uses R-22. I would like to replace the condenser with an R-410a unit, but I don't know if that is possible with my evaporator.
The model of my evaporator is a Rheem RCLB-A036S. The nameplate also says low side test pressure 150PSI. I was not able to find any published pressure specs for this model (other than specs relating to the air handler).
I gather from reading the referenced thread that I would for sure need a new TXV, but I'm not sure if the evaporator can take the different pressure used with an R-410a compressor?
Also, someone mentioned that the two different refrigerants take different lubricating oils, but does that matter? I mean, can the existing lines be cleaned?
And, another mention was made of the type of tubing used. That is two issues: 1. Is the coil tubing usable with R-410a? and 2. Is the connection tubing between the condenser and evaporator (that probably runs through my slab) usable with R-410a? This is important even with a new evaporator, which I might also do to be able to use R-410a.
It might or might not matter that I am located in California (in case we have some extra regs here, as is often the case).