The Taco SR502-4 Switching Relay is the best choice for all your zoning needs, with advanced PowerPort Cards, external diagnostic lights, switchable priority ...
EFFECTIVE: June 1, 2006. Plant ID# 9300-2100. SR 502. THERMOSTATS. ZONE1 ZONE2 ... Combine the reliability of the Taco Zone Valves, Priority Zoning .
Operation: When any thermostat calls for heat, the appropriate circu- lator is energized and the isolated end switch (X and X) will start the boiler.
Taco SR502 Switching Relay combines clearly labeled PC board layout with advanced features that allow for total system customization. External indicator lights ...
The Taco 2-Zone Switching Relay features advanced power port card, external diagnostic light, switchable priority and contractor friendly PC board layout.
The Taco SR502-4 switching relay is UL listed, use standard replaceable relays and are compatible with conventional and programmable thermostats.
Taco Circulator Relay - 2 zone single throw with end switch for boiler - for Circulating. v2885. Taco Circulator Relay - SR502-4. • 2 zones single throw with end ...
Taco SR502 Switching Relay combines clearly labeled PC board layout with advanced features that allowfor total system customization. External indicator lights ...
It is a circulator system. There are 2 separate Taco switching relays. The SR506 ( 2 zone radiant) is working; the SR502 (4 zone baseboard) is ...