Workshop Status:
In Progress
EPA Certification:
Not Texted
Employment Status:
Joshua Teel at HVAC Technical Academy
Joshua Teel video - Pump Down
Joshua Teel video transcript - Pump down (Training Transcript)
Speaker: Joshua Teel
Hi, I’m Joshua. I’m a student at HVAC Technical Academy, and I’m going to show you how to do a pump down. The purpose of doing a pump down is to isolate the refrigerant into the condenser. So, if we’re doing any work on our evaporator, like a cooling clean on the evaporator coils, or if we’re trying to replace our TXV, then to successfully do a pump down, we have to connect our gauges — our high side and our low side.
After we connect our gauges, we use this tool to close the liquid line first. After we close it — and it has to be lefty loosey, left tight — and we’re going on it, we have to go fast. This will close the liquid line valve side. After that, the pressure will start dropping on our low side gauge, and we have to make sure it doesn’t pass or reach zero psig.
So immediately after we close the liquid line, we then have to close the valve on our vapor line. If the pressure doesn’t hit zero psig, you will successfully seal and lock the refrigerant inside the condenser. If you fail to do that and it does reach zero psi, it will cause the refrigerant to go into an air hammer, and it won’t want to be accessed or pulled out.
I’m Joshua, and I’m from HVAC Technical Academy.