Geo-Flo, Controller, Taco ZVC 406 EXP-4, Zone Valves

Taco Switching Relays combine clearly labeled PC board layouts with advanced features that allow for total system customization. Whether using basic priority switching or the advanced features of the -EXP controls, the job is made easy. External indicator lights provide instant diagnostic feedback, making a snap of service calls or new installation start-ups. All switching relays are UL and CSA listed, use standard "ice cube" replaceable relays and are compatible with conventional and programmable thermostats.Features include: External Indicator Lights Switchable Priority Simplified Wiring Fully Enclosed Snap-Out Relays Compact Design Fuse Protected 100% Factory Tested Isolated End Switch Contractor Friendly PC Board Layout Universal Thermostat Compatibility UL and CSA Approved 24 Volt Power Input or Output Terminal Extended 3 Year Warranty Made in the USA Additional -EXP Features Plug-in PowerPort Card Slots Add-on Power Control Plug Expandable to 20 Zones Interface with -EXP Zone