This switch is to be used in conjunction with contactor switches. Auberin has them.
When i step up to a dual element I intend to use this same switch with two contactors. The switch would be all off, BK element on, HLT element on. This switch only needs low power to run it. When the power is chosen the contactor closes the link on the line letting the power go through to the SSR and heating element. I am not sure why but I have heard a few suggest avoiding 240V going through a switch that is external. SSR and contactors allow a remote access to switching.
I had to do some research on contactors. They are pretty similar to SSRs but different in the following ways:
- They are mechanical as opposed to solid state. Meaning they can wear out with lots of use like you would use an SSR. With these they should only be turned on once or twice a brew session.
- They will fail open so not leave the power on.
- They are cheaper and you can get 2 pole contactors for way less than DP contactors.
Here is Auberin's contactors.
BTW, I am using the HD 2 pole switch for my element now just on the output, downstream from the SSR. I had it in hand before I learned of this setup. I want to keep it simple for now but am running about 2 brew sessions per setup before I change things. Hopefully I can do my first 12 Gallon AG this weekend.
Does anyone know If I can do a 4 way switch off, BK-on, HLT-on, Both on?