Taco Switching Relays SR503-EXP-4. Taco Circulator Pump Relay SR503 EXP

The TACO 2 zone expandable switching relay’s layout helps make short work of most jobs and allows for simple integration of advanced features. Its snap-in PC board easily replaces any zone switching relay without replacing or rewiring the entire box. Uses a standard “ice cube” replaceable relay that is compatible with conventional and programmable thermostats. Features external lights to provide instant diagnostic feedback. Zoning Control, 3 Zone Expandable, Switch Type 3 Zone Expandable, 1/3 HP Per Zone HP, 6 Per Zone Full Load Amps @ 120VAC, Max 15, 11, 3-1/4, 7, Screw Holes Mounting, Circulator Zoning and Boiler Control, UL Listed in US And Canada, Includes Instruction Sheet