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| Tools & Home Improvement > Building Supplies > Heating & Cooling > HVAC Controls |
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| Product Description External indicator lights give you instant diagnostic feedback, making service calls or new installation start-ups a snap. All switching relays are UL listed, use standard "ice cube" replaceable relays and are compatible with conventional and programmable thermostats.Taco Switching Relays combine clearly-labeled PC board layouts with advanced features that allow you to completely customize your system. TACO SR 502 Switching Relay 2 Zones: Amazon.com: Industrial & Scientific Shipping Weight: 5.1 pounds | ||||||||
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