This enclosure, PLR's, and isolation relays are only used to winterize the LP functions. (4) Foam guns and (4) Foam Brushes. It activates at 32 degerees. It blows down for 10 seconds, injects washer fluid for 5 seconds, then follows by another 10 seconds of air. It cycles through one hose at a time until all 8 hoses are done. This minimizes load on the
flojet/compressor and winterizes each hose exactly with the same pressures. Above 32° it disarms itself. I semi-manually blow out the HP hoses with air and washer fluid, but use the same
flojet as the LP system uses. See post 3 and 12 of this thread for details. The HP hose blowdown is tied into the weep system.