Argo AZ-3 Zone RelayArgo AZ 3 is a Z157 three zone relay designed to drive zone valves with a built in 40 VA transformer. This compact relay delivers centralized control for multi zone HVAC setups, enabling coordinated operation of up to three zones from a single control point. With its 40 VA transformer, it supplies the power needed for valve actuators and compatible controllers, simplifying wiring and reducing setup time. The Argo AZ 3 is ideal for optimizing comfort

This AO Smith 9007872005 compatible kit helps replace a worn or faulty thermopile to restore safe

Designed for liquid propane systems

Size and Fit: 18-inch overall size ensures a precise seal and proper alignment with the burner housing

with non-volatile memory to preserve settings

or model upgrades in residential water heating systems

dependable wiring in gas furnace configurations

Heavy-duty butyl/EPDM diaphragm

straightforward installation for quick service

Operating temperature: 32–140 °F

Rugged enclosure designed for industrial environments

Weighing about 8 pounds

while the compact footprint fits tight service spaces