Ran across a 40+ yr old home-brew type lineset install for a 5 ton split system. Suction is 1-3/8 & liquid is 5/8, length is around
100'. Both liquid and suction line are touching each other the whole length, insulation if any is wrapped around both together. About 10' is underground, direct burial.Its a fixed orifice system. In 40 yrs, its on its third condenser, which is 2-3 yrs old.
Other than requiring 3-4 times the amt of gas to charge such a system, what are the ramifications of excessive subcooling and superheat?
Is this an older style technology? (pjm should know this one..) :)