about 1 year old sys worked 1 summer this is the 2 summer....found sys low 0F subcooling (side glass bubles) added 3 lbs of 410 A (service tech left caps off service valve) sys runs now with 4F of subcooling yes side glass is clear (4F subcooling as per lennox chart) LOW 75PSI HIGH 250PSI 410A SYS i think ambiant was like 80F after added 3lbs of 410a ran sys for 20min check txv superheat by compresor 58F check indoor unit 12 blinks 1200 CFMS(3 ton cond),filter clear,return clear,evap coil clean,freezing right after TXV......remove sencing bulb warm up by hand low said still the same liqud line is same before txv as by the service port....i think i got covered evrything before i go ahead and order new TXV???????
What i did is added more 410A so i have 25F of superheat overcharge it so custumer has ac until we come back with new one LOW 115PSI HIGH 350PSI you thing i did good thing????
OTHER QUESTION ONLY FOR PEOPLE WHO WORK BY THE BOOK......
ON R-22 WHAT SHOULD YOU HAVE SUPERHEAT ADJ???? IS IT 20F by compresor?? and whats TXV for 410a superheat adj??? i have check sys they are running with 30F of superheat (BY COMPRESSOR) with proper subcooling......thanks guys and you hacks dont bother to write answear on this