Looking for some pro help...
I own a Armstrong Air Ultra 80 oil furnace LUF80C112/125D20-1
I want to replace my very old 8 SEER 3.5 ton outdoor compressor.
My game plan...
Replace the compressor with a 3 ton unit (I find that the current unit simply is not on that much in the summer (we do not put the temp. lower than 76 in hot weather) and we are usually very comfortable.
I plan to buy a 3 ton Amana 18 SEER compressor (ASX18 0361A) and want to be sure I get the right coil to match.
Looks like uncased coils CAUF3642D6A, CAUF4860C6A or CAUF4860D6A should match. (actual width might be an issue)
The SEER ratings are based on a variable speed fan. My Armstrong Unit has a single speed direct drive fan with time delay.
The folks at Armstrong gave me the part numbers for their 18 SEER unit and said I would need an Expansion Valve (part A4TXV0TTXV) to go with the coil.
The Armstrong rep also said my fan is rated for 5 tons (seemed high to me)
Can this set up work?
What does the Expansion Value do and do I need it?
Please note - I am not trying to do this on my own, just trying to get the best info.