Â I'm sorry, JV. If there was to be a picture of the aroma dispenser attached to your response, it did not get through. Can you try again?
In the meantime, the PowerPak 240V wiring diagram (from the installation manual) is attached here. Be sure to click on the "original" link to see it full size. The manual is straight from the manufacturer's website
I honestly don't see howÂ you would directly connect a 115V unit to a solenoid that's clearly markedÂ "208/240V SOLENOID". There has to be an isolated high voltage sensing circuit of sorts inside the dispenser in order to sync it to the operation of the high voltage solenoid. Because of the high voltages involved it would have to be clearly marked.
So far you have described the wiring on the solenoid, but what does the dispenser have as far as any wires coming out of it or connectors on the outside of its body, any type of connection that would make you believe it does in fact get hooked up to the solenoid or any part of the steam generator for that matter? What if it simply senses the pressure in the steam outlet and releases its charge when the pressure drops?
Sorry, I am just wildly speculating at this point because I have no info about the dispenser whatsoever. All references to aromatherapy by Thermasol are actually about a reservoir on the steam head - clearly a passive device that simply holds the oils in the path of the steam flow and it picks it up and brings droplets of oils into the spa.