Taco 2 Zone Switching Relay w/ Priority SR502-4, allow for a simple integration of advanced features. Energy savings and increased comfort can be easily achieved in any new or existing system by plugging a PC700 Outdoor Reset Power Control into the SR501-EXP
Taco Switching Relays combine clearly labeled PC board layouts 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. All switching relays are UL listed, are compatible with conventional and programmable thermostats.
Technical Information
Taco Zone Controls Wiring Guide
SR502 Instruction Sheet
Taco-SR-502-4-Brochure
Features
Front Diagnostic Lights
Simplified Wiring
Premium Sealed Relays
Add-on Power Control Plug
Built-in; Post Purge and Pump Exercise Functions
Switchable Primary Circulator Output
Two boiler contacts, utilizes full functionality of Mod-Con boilers
Fuse Protected (with spare)
100% Factory Tested
Isolated End Switch
Contractor Friendly PC Board Layout
Universal Thermostat Compatibility
24 Volt Power Output for hard wired thermostats
Field Replaceable Transformer
UL Approved
Extended 3 Year Warranty
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