ST-2E / ST-3E

[Steven W.]

If you are looking for a Thermostat for the master zone on your ST-2E / ST-3E zone boards here is a list of Thermostats that have the separate "O" and "B" connections that you are going to need for the master zone. Remember the ST series boards are master/slave (Winter/Summer manual changeover) so you are going to need these two connections on your zone 1 thermostat for your board to work correctly.

FYI
When you are programming the EWT-601-2 and EWT-725 Thermostats for the ST-2/3E Boards program them to Heat/Cool not Heat Pump. The Heat Pump setting will not work for the ST-2/3E Boards. There are NO WIFI thermostat's that will work with the ST boards.


EWC Thermostats
EWT-601-2 – None Programmable
EWT-725 - Programmable



PRO 1 Thermostats
T601-2 – None Programmable
T725 - Programmable

EWC Controls, LLC. does not manufacturer the ST zones boards anymore.
If you are looking to replace your ST zone board then you will need the NCM-300 or NCM-3Z