I just added one point to the manual. Drain and change the oil in the high pressure pump yearly.
When I put mine to bed, once I have the preservative in the membranes, I close both needle valves and then drain the wash tank (and rinse it) plus I drain the HP pump. just remove the plug in the bottom of the line of fittings at the bottom.
Membranes can also be stored in a canister and stored where they will not freeze. If you store them in the RO, be sure to keep them from freezing.
Dave
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.