I'm building a circuit that involves the use of multiple transformers. I've mainly used transformers that had one primary and one or two secondary windings. However, this time, the transformer I'm working with has two primary windings and two secondary windings, like in the diagram below:
simulate this circuit – Schematic created using CircuitLab
What is the proper way to wire such a transformer? Do both primary sides have to be wired to something in order to work? In my simulation, I'm only using one primary winding and one secondary as a bridge-rectifier, so the other one is not used at all. If I decide to make S1 and S2 center-tapped, will I have to use P2 as well?
EDIT: More info, I'm working with 115 Vrms. This is a signal transformer. If I have to give it a model, it's the 14A-56-28