Working on my A/C Issues

[daking]

I installed all new stuff, Compressor, Condenser, Hoses, O-Rings, Black can and so on...

 

Added oil

 

opened the valves 1/2 way on compressor.

 

Vacuumed it out. 

 

Proceeded to fill with Red Tech 12. 

 

Low side hits ~100PSI. Way too high

 

High side stays at ~0 or sometimes will goto ~50.

 

I have forced the compressor on, no change. 

 

The only thing I can think of is there is a "Valve" or something on a hose on the can, maybe that valve is not getting pressed?

 

What am I missing here? 

 

Thanks 

[HOrnbrod]

It sounds like you have the LO and HI service valves set in the wrong positions. When charging, the LO side valve needs to be opened (stem turned cw to the stop) and the HI side valve closed ccw to the stop). When finished charging, detach can fitting from the LO side and close the valve (ccw to the stop) for normal operation.

[daking]

Thanks for some direction. I tried that, and the compressor locked. With the hose closed, nothing to pull. I thought about it, and maybe I should have had the refrigerant can open? So it can suck from the can?

 

What I figured out on those valves. Fully open (Stem extended), allows full flow through hoses. Fully closed (Stem as short as it will go), closes the hoses and only allows valve. Soo, I was thinking the stems need to be about mid point to allow flow through everything. 

 

I know I'm not the only one to fill the AC on these, there must be a read me or video out there, right? 

[HOrnbrod]

Can has to be open. Did you see this? It worked great for me.
 

[SBpunk]

Something I didn't know is the little metal nubs that open the AC system turn the opposite direction (left to close right to open).

[HOrnbrod]

Yep, just the opposite of what seems logical to me.