gmansr
18-08-2010, 08:41 PM
I am considering updating my exist Rudd 9 seer unit with a new Rheem 15 seer unit. The new units are 15JPL30A01 heat pump with a RHKLHM3617A air handler. The existing refrigerant line size is composed of 1/4 " and 3/8 " copper piping. The vertical rise using the 1/4 " is approx. 16 ' followed by approx. 20 ' of horizonal, it then switches over to 3/8 " for the remaing 18 ' run to the air handler located in the attic. Total run is approx 54 feet. The problem is that the vertical run is inside an insulated wall, the contactor said that he is confident the system will work with the existing runs, but if it doesn't he will run a new line but go the 16' vertical run on the outside of the house which I don't want to do. Rheem specs state the complete run should be 3/8 ", any suggestions? Is there a different system I could use?