Hey everyone, I acquired a portable propane water heater last year in an attempt to heat a very small pop up pool a few degrees. It worked wonderfully when it worked at all, which wasn't very often. I contacted the manufacturer, and they were completely unwilling to help beyond very simple troubleshooting steps. On my own, I determined the heater is extremely sensitive to very light winds due to a single temperature sensor in a very poor location, and the heater is limited to 20 minute run times and has a very poor timer reset routine (basically have to wait all day for it to reset). I'd like to create my own controller for this unit and I believe it'll be very easy to do so. My first step was to determine the proper wiring of the LPG solenoid valve, but I cannot find any information anywhere on it. I have found a product similiar enough I'm sure it's 100% compatible:
However, I'm struggling to find any instructions on how to wire this 3 wire solenoid. Testing the original controller, it seems as if the black wire is ground, and both the yellow and red wires are supplied with 3vdc to open (pull or retract) the valve. Voltage is completely removed to close (push or extend by spring force) the valve. I am doubting that's as simple as it is though, because I don't know of any reason it would require two voltage inputs to do the job.
If I apply voltage to one wire, and gently push the solenoid arm, it retracts very quickly. If I apply voltage to the other wire, and gently push the solenoid arm, it retracts, but not as powerfully. If I apply voltage to both wires, and gently push the arm, it retracts most powerfully.
So... does anyone know how this device is supposed to be wired? And, if it truly does require both wires to have 3vdc, can you help me understand why?