Yeah, that might even help keep moisture out of the system.
With a hole in the indoor unit, and sun hitting the outdoor unit,
the system will breathe out, and back in at night.
Moisture is the enemy of R410a, and a vacuum pump will have to remove all of it from the system.
More moisture (damp air) inside the system means it will take longer to dry it out.
As the vacuum gets deep, water will boil, turn into vapor and be sucked out by the pump.
I once repaired a leaky outdoor unit that had been exposed to air (a small hole) for many months.
Seemingly, the POE oil (Polyolester oil) in the system was still good.
Once the hole was brazed over, and pressure testing and vacuuming was done, we just charged the unit up and used it.
It lasted a few years, before a grid power glitch killed the main control board..
Here's the link, if you get bored over the weekend..
http://ecorenovator.org/forum/geothe...r-project.html
Where are you at in Texas?
I was born DITHOT but left (Navy) when I was 17.. this month, I'll be 71.
Things are reversing around..
