EWC Controls ST-2E

Model ST series panels are for 1-stage heating and cooling with manual changeover. Zone 1 is the master zone which controls the heating and cooling mode and also the fan operation. The ST-2 is a 2 zone panel and the ST-3 is a 3 zone panel. Zones 2 and 3 will only operate in the same mode that the zone 1 thermostat is in. Each thermostat can turn the system "on" and "off ", but only in the same mode. It is recommended the zones 2 and 3 have no switching subbases for the thermostats. The ST panels can be used with mechanical or digital programmable thermostats that are non-power stealing. Open-Close switches on the control panels near the damper terminal blocks allow for continuous air circulation. This switch controls the damper position when the heating and air conditioning system is at rest. The ST panels can be wired together to create larger zoning systems up to 6 zones.

EWC® Ultra-Zone Control Panel, Series: ST, 24 VAC, 2.5 A, 40 - 60 V-A VA, 50/60 Hz, 2 -Zone, Manual Changeover, 5 - 95% RH Non-Condensing Humidity, 1 Heat/1 Cool Stages, -20 to 160 deg F, 10 in L x 9-7/8 in W x 1.7 in D

• Number of zones: two - three zones, expandable to four, five or six zones, by twinning two ST Series panels together
• On board manual switches can default zone dampers to the open or close position during idle periods
• Compatible single stage heat/cool thermostats- zone 1 (master) thermostat must have separate "O" and "B" terminals. Zone 2 and higher (slave) thermostats can be any standard thermostat, heat pump thermostats are not compatible with this product
• Compatible dampers - EWC models URD, ND, RSD and SID. any 24 VAC 3-wire or 2-wire motorized damper
• 18 AWG solid copper wiring
• Knockouts: 3/4 in available at top, bottom and back of molded impact-resistant housing

• Specification Sheet https://assets.unilogcorp.com/267/ITEM/DOC/EWC_ST_3E_Specification_Sheet.pdf