ST-2E / ST-3E

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Steven W.
Posts: 25
Joined: Tue Jun 25, 2019 9:13 am

ST-2E / ST-3E

Post by 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.

EWC Thermostats
EWT-601-2 – None Programmable
EWT-725 - Programmable
EWT-855 - Programmable
EWT-855iSH – WiFi Thermostat
EWT-955WH – Wireless Thermostat

Emerson Thermostats

PRO 1 Thermostats
T601-2 – None Programmable
T725 - Programmable
T855 - Programmable
T855iSH – WiFi Thermostat
T955WH – Wireless Thermostat
Steven R. Weisneck
Technical Engineer
Tel: (732) 446-3110 Ext. #461