MCS-DXB Tech Bulletin Remote selector switch for use with ST series ULTRA-ZONE Control panels. This switch replaces the zone 1 thermostat subbase if a separate remote system control is desired. 4 wires required.
MCS-DXB Tech Bulletin Remote selector switch for use with ST series ULTRA-ZONE Control panels. This switch replaces the zone 1 thermostat subbase if a separate remote system control is desired. 4 wires required. For more information go to: http://www.ewccontrols.com/acrobat/090375a0222.pdf