I have a Williams wall mount heater model #5009622. My problem is I do not know if it wired up correctly. I looked at an owners manual online and it showed a diagram of a control valve having three electrical posts. Mine has four. What I need to know is where all the components connect to the contol valve? After that is taken care of I may need more help. The reason it is apart was to change the pilot generator because the pilot won't stay lit. Thanks.

Can you provide the link to the manual?