Taco ZVC404-EXP-4 - Expandable 4 Zone Valve Control with Priority

The Taco ZVC404-EXP-4 is a 4-zone expandable zone valve control designed for hydronic heating systems. It operates on 120v AC power and features a priority zone option, dry contact end switches for boiler integration, and a built-in pump and valve exercise timer. The expandable design allows multiple controls to be daisy-chained for larger systems, making it suitable for residential and light commercial applications.

Specifications

Manufacturer: Taco Comfort Solutions
Model: ZVC404-EXP-4
Type: 4 zone expandable valve control
Voltage: 120v AC, 60 hz, 1 phase
Full load amps: 1.5 amps at 120v AC
Priority zone: included
Pump exercise: solid-state timer for pump and valve cycling
End switches: dry contact for boiler control
Electrical connections: screw terminals
Wire size: 12–18 gauge for 120v AC, 14–22 gauge for other connections
Dimensions: approximately 11.75 in L x 3 in W x 7.5 in H
Weight: approximately 5.75–7.5 lbs
Certifications: UL and CSA

Applications

Hydronic heating systems with multiple zones
Installations requiring priority control such as domestic hot water
Residential and light commercial heating projects
Systems where panels need to be linked for expansion
Projects needing integrated boiler control with end switches

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ZVC404-EXP-4 - Expandable 4 Zone Valve Control with Priority