we have talked about this valve before, but it is so easy for a student or new tech to get them mixed up, I am covering it again in detail and this time I cut one open.
hvacrschool.co...
hvacrschool.co...
• HVACR 3 Position Servi...
• Types of HVAC/R Servic...
www.achrnews.c...
www.hvacknowit...
22 июл 2021