When I originally installed my OSPi hardware I quickly discovered that I had a shorted solenoid, 😳 !!!
The shorted solenoid immediately caused a triac to give all it could until it smoked. 😯
After emailing with Ray, Ray highly recommended that I put a fuse (a one amp fast-blow type) in series to the 24VAC power going to the OSPi.
I’ve not had any more shorted solenoids, but if I ever do, I feel confident the fuse will blow before the OSPi is hurt. 