Vacuum Techniques

[Exahertz]

I Just bought a valve core remover and would like to know just how i should use it.

Is this procedure correct?


Install the valve core puller on the system.


Screw it on to the flase access valve thus filling it with refridgerant.


remove the valve core by unscrewing it from the access valve and pulling it out.


Close the isolation valve from the core and the unit


remove the core puller head and core itself


install a yellow hose inplace of the core puller's head


pull a vacuum and remove all of the air


open the valve and allow refridgerant to backfill the hose


then start to recover the refridgerant


recover untill the pressure is down to the EPA's sugested vacuum (25 in.hg I think).



then pull a deep vacuum on the unit


close the isolation valve holding the vacuum in the system.


remove the hose.


and reinstall the core puller's head (sugest using a new core aswell)


open the valve, allowing the core to be inserted.


slide the core back down into the access valve and reinstalle it by screwing it back in.


then remove the entire core puller assembly, leaving the unit still under deep vacuum.

so do you think thats how its done??