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The SR504-4 from Taco is a 4-Zone Switching Relay w/ Priority. It combines clearly labeled PC board layout with advanced features that allow for total system customization. External indicator lights provide instant diagnostic feedback, making a snap of service calls or new installation start-ups. Taco SR504 switching relay is UL/CSA listed, uses standard “ice cube” replaceable relay and is compatible with conventional and programmable thermostats.
|Power Method:||120 VAC Input|