EWC Controls Forum

Hi. I’m attempting this again. Would it be possible to call again as I’m still not certain about switching some of the wires. Thanks.

Note: I have tried to attach images but I'm getting the following error:

"Sorry, the board attachment quota has been reached."

Update: Images attached

Hello All, I need some help making sure I have the correct re-wiring before I upgrade my Control Panel from ST-2E to NCM-300. I've attached photos and a wiring diagram for the old and new configuration but have a few (hopefully simple) questions: 1. Where should the 'R' and 'W' wires for the HVAC go...