oav unit wired different
A few years ago I bought a Heilyser JB 200 vaporizer. I wired it myself and put a switch in the positive leg. The following year I bought a second one from a US distributer that was prewired. Last week I was treating some hives......had both units attached to the same battery and switched off and while moving the whole mess the two units touched one another and popped a nice arc. When I got home I checked and found that the bought wired unit had the switch in the negative leg. I don't know if this is how they wire all of them or if they don't pay any attention or if it is a fluke. No matter. If you are running multiples and they came prewired you may want to check and make sure they are all switched the same way...otherwise you could have some trouble. I'll rewire the bought one so mine are the same...and have the + leg switched as I prefer.
Let me never fall into the vulgar mistake of dreaming that I am persecuted whenever I am contradicted. - Emerson