Knowing how immensely unreliable the flowswitch on the diesel burning ElDiablo is.....you better make sure you develop good hearing to keep an ear on the rumbling of the fire.
So no earplugs for anyone using these units.
Otherwise you could blow the whole thing up...
You put the wand down to move some things, or to tie your shoe laces or whatever. And if the flowswitch is stuck in the on position, the fire will be burning while water is not running through the system- Causing the water to heat heat heat and with that, raising the pressure like crazy.
If it isn't clear.... I made these multiple posts over the years on this- in case one time I won't catch it on time and I blow the whole thing up and burn a customer's house. I am going to need this to present to the judge that it's a major design flaw...that was noted many times over and even flowswitch replacements don't fix it.