Taco SR502 Switching Relay 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 SR502 switching relays are UL and CSA listed, use standard “ice cube” replaceable relays and are compatible with conventional and programmable thermostats.
- External Indicator Lights
- Switchable Priority
- Simplified Wiring
- Fully Enclosed Snap-Out Relays
- Compact Design
- Fuse Protected
- 100% Factory Tested
- Isolated End Switch
- Contractor Friendly PC Board Layout
- Universal Thermostat Compatibility
- UL and CSA Approved
- 24 Volt Power Input or Output Terminal
- Made in the USA
- Zones: 2
- Power: 120VAC
- Max combined load: 15.0 AMPs
- Dimensions: 10.25" wide x 6.75" high x 2.75" deep.
Extended 3 Year Warranty
Ask a Question
Is it possible to control a zone valve from a switching relay?
Taco SR switching relays are for circulators only. If you need to control zone valves, use Taco ZVC (Zone Valve Controls).
By PexUniverse Customer Service on 12/10/2013
I have 4 zones of baseboard heat in my home. I installed a fifth zone which is radiant heat with its on pump, zone valve and mixing valve. I purchased a tacosr502 switching relay so that the pump can run for the radiant side when thermostat call for heat. My question is do I leave all the the existing thermostat wires connected to the TT ?
If radiant heating zone requires a separate temperature control, then a separate thermostat has to be installed and wired to the Taco SR502 panel.
By PexUniverse Customer Service on 09/04/2012