Only if I have a small leak at or near the releaser, but then I do not leave my vacuum run 24/7. I set it to shut off about 2 hrs after the temps are forecast to go below freezing. At one woods I left my pump on thru a freeze and had problems years ago. AS the sap rushed into the releaser it had some slush in it, when it dumped some slush held the flapper valve partially open, between the main manifold chamber and one side of the double releaser. That huge rush of air in thru the slightly open flapper froze the releaser, sent slush to the moisture trap, froze that so it did not prevent slush from filling the vacuum pump. I had to remove the pump, moisture trap and take them home to thaw in the shower. I disassembled the releaser and was able to get all of the ice out in a couple of hours.
When that happened, I decided 24/7 was not for me, the 2 hrs past freeze up has worked well for me.
Dave Klish, I recently ordered a 2x6 wood fired evaporator from A&A Sheet Metal which I will be converting to oil fired
Now have solar, 2x6 finish pan, 5 bank 7x7 filter press, large water jacketed bottler, and tankless water heater.
Recently bought another Gingerich RO, this one was a 125, but a second membrane was added thus is a 250, like I had.
After running a 2x3, a 2x6, 3x8 tapping from 79 taps up to 1320 all woodfired, now I'm going to a 2x6 oil fired and a 200-425 taps.