The last step is for your HVAC guy (R410A certified) to perform..
Be sure to get him to sign your warranty card, where it says
installer.
I think the best way to do it, is to have a good
cut-off valve on your hose at the service port,
1. shut it off, (
the cut-off)
2. then turn off the pump.
3. then release the R410A with the hex key. (Both valves).
4. Remove (quickly) the service adapter (using gloves).
If your valves leak a little when turned(like mine),
you might want to shut off a valve on your micron meter(isolating it),
while leaving the pump running (holding a hard vac).
And then start cracking the service valve (liquid line as in the pic),
and then
quickly shut off the
cut-off valve on the port, when the
first whiff of R410A hisses into the line set.
You will hear a sudden change in the sound of the pump motor.
Once the
cut-off is shut, kill the pump and then open both service valves.
Since your hose has a push pin, there will be pressure inside the service adapter.
Use gloves when you (quickly) unscrew the adapter.
If you do it real slow, there will be a loss of R410A. Not good.
You also might want to do another soap bubble test at this point..
If you did a good pressure test before, doing it again under R410A pressures
is not likely to show up any leaks.
In my manual, they said to open the valve for 10 seconds and the shut it,
(releasing pressure into the line set and then locking that pressure in).
so, a second bubble check to be performed.
What model did you get??
