Not to be offensive, but I am a little concerned whether or not you are a "qualified" person to do this work. From your wording I think perhaps not.
Transformer hookup need to be completed following the wiring diagram on the transformer, and all overload protection needs to be in place.
Most control transformers are required to be grounded, and connected to the neutral of the transformer. This is not the same as grounding of the unit, which should be done with a properly sized equipment grounding conductor, run with the supply lines.
You should get a qualified person to check out this installation. Those boards have to be too expensive to test out someone's knowledge (or lack of) on.
If I have this wrong, please forgive me.