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R22 txv needed for adp coil
zepfan
Member Posts: 408
Does anyone know of the company that makes the TXV's that have a threded connection on the outlet? I normally see these on the uncased adp evaporator coils, but looking on ADP's website I don't see that they offer one for R22, only 410a. We have a job where the evaporator coil needs to be replaced because the metal drain pan is leaking and the owner does not want to change out the ac unit. I want to make for an easy change out when the outdoor unit is eventually changed out. Take the r22 txv off the coil and replace it with a 410a thanks to all
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Comments
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@zepfan
What your looking for is a Chatleff connector that's what those threaded connections are called. Sporlan, Parker, Danfoss all make them.
If you can't find a R-22 valve with chatleff connections. buy a sweat R-22 valve and put a chatleff connector on it. The connectors are made sweat x chatleff1 -
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Does anyone have any reservations about using a previous R-22 evap coil with 410A?
Any concerns about residual oil mixing with new?0 -
Oil isn't much of a concern, but IDK if an old 22 coil can take the pressures 410 works at. If it's not too old, it might have a dual rating.0
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R-22 coils used on 410A I am sure your not supposed to but I also know it's done all the time.
there are some old Sanyo ductless splits at the time share I go to on Cape Cod that are 35 years old (that's when I bought the time share) believe it or not. The line sets are buried in the walls.
I noticed about 5 years ago that they had replaced some condensing units with new 410A condensing units and used the old line sets and indoor units.
They do work, probably not right0 -
Oil is not an Issue. R-22 Coils have NOT been pressure tested for R-410A standing pressures so you accept all liability if something goes wrong!0
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Thanks all for your replies.
I think another issue is the physical size is smaller for the same tonnage. Would it be a good guess to drop size by 1/2 or 1 ton with the proper TXV? Trying to get closer to the 410A AC SEER ?0
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