EWC Controls Forum

Unfortunately, I believe you'll need to upgrade your control panel. I have the ST-3E and found through many forums and Google searches that I'd need to upgrade as well. I confirmed this by calling EWC. The NCM-300 was recommended. I've followed that advice. Just received the NCM-300 the other day ...

We've added a wiring diagram - http://ewccontrols.com/acrobat/090512a0369.pdf. Thank you for posting that! I am in the same situation as the original poster and have some questions myself. I've consulted the wiring diagram posted as well as the individual ones for each control panel. I'll try to ...