EWC Controls Forum

The first thing to note is the jumper wire you mentioned from Transformer 1 to System R. This jumper wire ensures that the system receives the necessary power from the transformer. So, when you swap to the NCM-300, you should also connect the R terminals of the new transformer and system using a ...

There might be a setting or configuration that needs adjustment in your zoning system. i give you few suggestions to troubleshoot the issue: Check the thermostat settings: Make sure that the thermostats on the upper floors are correctly set to "Cool" and that their temperature settings are lower ...