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Taco SR503-EXP-4 Three Zone Expandable Switching Relay

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SR503-EXP-4
SKU:
SR503-EXP-4
UPC:
687752857597
$267.50

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Description

Whether you want to expand up to 120 zones or utilize the advanced features of the Add-on Power Controls, Taco -EXP controls allow for simple integration of advanced features. Built-in Post Purge and Pump Exercise functions can optimize
the operation of any system

Features

  • Front Diagnostic Lights
  • Switchable Priority
  • Built-in Priority Protection
  • Simplified Wiring
  • Premium Sealed Relays
  • Compact Design
  • Fuse Protected
  • 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
  • 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
  • Expandable to 20 Zoning Panels (120 zones if all are 6 zone panels)
  • Interface with -EXP Zone Valve Controls

Specs

Transformer Voltage: 120 VAC Input

Maximum Combined Load: 15 amps

Number of Zones: 3 with Priority

Downloads

Specification Sheet

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