The situation is that I have an empty split system. That is, it has
no refrigerant in it. It is a TXV system. I want to be sure it has
no restrictions when I re-charge and run it. I don't have a lot
of extra time, so I need to do this as efficiently as possible.
(Yes, I am covering for a diagnostic screw-up when the system
was charged. I have another post around here detailing that
I have never encountered a restriction so anything anybody can
tell me about actually encountering them would be welcome.
I have heard mention of liquid line restrictions, but how
big of a restriction would it have to be to clog a refrigerant line?
Aren't we left with filter-drier, TXV, and maybe (?) evaporator
coils lines? (Can they be tiny or is that just for cap-tube systems?)
Do typical split system residential evap coils have
tiny lines and multiple circuits or are they generally one or two
circuits with relatively non-cloggable lines?
I was thinking that I could front seat both service valves
and run nitrogen through my gauges into the liquid line
and let it open at the suction line? If there were a restriction
affecting suction pressure, would I know it doing this
nitrogen flush? If a filter drier were clogged, would this
nitrogen flush do more harm than good?
Should I open up the line at the TXV
for inspection? Should I go into nursing?
Again, anything would be more than I know now.