Now I'm confused
Valter, yours is reversed from this in your picture.
lsayer, yours shouldn't be both set the same.
I must have my annotation messed up...
Well, seems there are at least a couple ways to wire this depending on what options were built in on a particular order.
With the Dual A'stat I see 2 possibilities, if you want circ. pumps off when temp goes below a set point(140*), or another way, if you wanted a Dump Zone to start...Low Limit of Dual A'stat (N/O)
Now similar deal, with an added L4006, 2 possibilities, use it for your High Limit or for your Operating Limit.
Valter, yours looks like Dual A'stat Low is for Circ. Pumps low cut out and High is for your Dump Zone. L4006 would be for your Operating Limit Limit
lsayer, your Dual A'stat Low may be your Operating Limit and High Limit is your Dump Zone. L4006 would be your circ. pump low cut out.
It's the best I can do from here.