So I have been thinking about how to make my system double redundant. Currently it has a battery backup which will run the system for 5+ hrs, so I am covered for loss of power. I also have a Honeywell aqua stat for high temp protection (circulates water through storage). I have contemplated adding a dump zone but only being a "basic" electrician was unsure with with how to incorporate both an Auto-mag (for power failure) and Zone valve to auto siphon for high temp protection. While walking the dogs it hit me and think I have found the solution.
I could use a Tekmar 150 and A auto mag. I would put the temp sensor on the boiler, the Tekmar 150 would have a setpoint of lets say 200*. When the boiler is below 200* the auto-mag would be energized and stay closed if either the power goes out or boiler get's over 200* the Auto mag is de-energized and it opens allowing for auto siphon.
Sound right?
I could use a Tekmar 150 and A auto mag. I would put the temp sensor on the boiler, the Tekmar 150 would have a setpoint of lets say 200*. When the boiler is below 200* the auto-mag would be energized and stay closed if either the power goes out or boiler get's over 200* the Auto mag is de-energized and it opens allowing for auto siphon.
Sound right?