[SLO-BOB]

Shaun, yes you have to program the process - in your case it's easy because it's just temp control.

Your controller is of the dry contact type which means that the no and nc rely on whatever power you provided to the common. There was a 24v option which you did not get. It would be more clear if I could see one of the contactors and the wiring because I thought you said it was a 24v solenoid. To me it seems as if the contactors really have a 120v solenoid because the L1 jumpered to the common on your old board. Unless that thermostat miraculously transformed 120v down to 24v your contactor is triggered by 120v.
Lets verify what kind of contactor your using. Can you post a pic?

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