how to wire a vaporstat in series with presure control

Nation

I have been reading many threads that recommend wiring the pressure control as a backup for the vaporstat. How do I series these properly I can only get one or the other to work. I currently just have the vaporstat wired up on the R and B terminals. Wich terminals would I wire the pressure control to. Both of these are Honeywell controls by the way.  

JStar

Wiring

Let's assume that the controls are exactly the way they came from the factory. After you install the Vaporstat, run a wire from it to the existing Pressuretrol. Take one wire off of the P-trol terminal. Wire nut that wire to one wire from the V-stat. The other wire from the V-stat goes to the P-trol terminal.



Think about series wiring as completing a circle.

Nation

thank you

Yes this makes sense thank you for your help.