If a system is over-sized like most a Txv will adapt to the load placed on it. Most Txv's have a screen to protect them from becoming clogged, most pistons don't and can become restricted from small particle's.Originally posted by mark beiser
Robo going off the deep end?
Most of what he said is true to one degree or another.
The refrigerant charge is much more critical in a fixed metered system. A TXV equipped system can be slightly under or over charged, sometimes even significantly over charged, without making a significant, or even measurable difference in the performance of the system.
While poor airflow is bad for any system, a TXV is more likely to prevent flooding of the evaperator coil and liquid refrigerant getting to the compressor than a fixed metered system. I have seen ballance port type TXVs loose control of the superheat when poor airflow is combined with other problems in the system though.
It is a known fact that a TXV provides better protection for the compressor.
He kinda lost me with the equipment size and more likely to become restricted parts though, lol.
Robo's just stuck in Goodman land.