wiring a honeywell L6006c aquastat

For all those plumbers and other knowledgeable people out there – I am installing a hot water recirc. loop in my home, using a timer controlling an aquastat and then to a Taco 006 bronze circulator. Question is the aquastat has 3 unlabeled terminals – how do I wire this one up (for a high limit setting) – I assume the neutrals bond together but which screws do use use for the high limit? any suggestions would be greatly appreciated, and in advance – thanks
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http://hbctechlit.honeywell.com/request.cfm?form=95-5973
use the timer to controll the pump. The heater already has a temperature control.
thanks for your reply. I realize the heater already has an aquastat, what i am doing is using another aquastat after a timer (and before the circulator - a taco 006 bronze)so that when the return loop gets to 140 degrees it turns off the pump - trying to save on elec. - very expensive up here in NH. Want to set it for high shut off, terminals on aquastat are not marked as the install material would have you believe (i.e. R,B,W).
You can use an ohm meter to see what are the NO and NC contacts at room temp.That won't tell you which is the common if you need to use both.