When and if you shut the pump off the releaser will dump. Most larger producers turn the vacuum on on day one and don't turn it off until the end of the season, others, myself included, turn mine off as the temperature falls to 28-29F. Sap will run after the freezing temps hit, because the tree does not freeze as soon as the air. To oil the releaser, consult the manual. My releaser gets mineral oil on the lift rod (on the float) and most of the pivot points get food grade light weight grease. Every pivot or sliding part should be lubricated, just keep it very light and only use what the manufacturer specifies. If you don't have the manual, most should be available online.
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.
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