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SR501-HC-4

Part Number	SR501-HC-4
Manufacturer	Taco
Description	Switching Relay
Published	Feb 21, 2014
Detailed Description	Instruction Sheet SUPERSEDES: June 1, 2010 Plant ID# 9300-2795 102-418 SR501-HC-4 Switching Relay, High Current Capaci...
Datasheet	SR501-HC-4 PDF File

Overview

Instruction Sheet SUPERSEDES: June 1, 2010 Plant ID# 9300-2795 102-418 SR501-HC-4 Switching Relay, High Current Capacity EFFECTIVE: June 1, 2012 Features: External Indicator Lights Simplified Wiring Sealed Relays 100% Factory Tested Contractor Friendly PC Board Layout Universal Thermostat Compatibility UL Approved Extended 3 Year Warranty 120 VAC Application: 1 zone switching relay with boiler enable or 2 zone without boiler enable.
240 VAC Application: 1 zone switching relay when switching both of the circulator hot leads (L1 & L2).
Operation: Connect a thermostat to the R & W1 and/or W2 terminals on the switching relay.
When the thermostat(s) call for heat, the relays are energized and power is given to the circulator(s).
Zone Control Power Input: Connect 120 volt AC power input to terminals N and H.
Neutral wire to terminal N.
Hot wire to terminal H.
External Diagnostics: The external lights show full functionality of the switching relay.
The green light should always be on, indicating that power is connected.
When either thermostat calls for heat, both the appropriate relay and red indicating light are energized.
The Taco Connection: Combine the reliability of the Taco Zone Valves, Priority Zoning Circulators, Thermostats, and the “00” family of circulators with the advanced features of the Taco Zone Controls to achieve total system integration.
No matter the application, Taco now provides the products to maximize system performance while simplifying both installation and service.
Terminal Description: R W1 W2 C N H X1 X1 X2 X2 Hot side of transformer.
Connect to R on thermostat.
Switched R signal from thermostat #1.
Connect to W on thermostat.
Switched R signal from thermostat #2.
Connect to W on thermostat.
Common side of transformer.
Connect to COM on thermostat (optional).
Neutral wire of power input.
Hot wire of power input.
Dry contacts for relay 1 (W1).
Dry contacts for relay 1 (W1).
Dry contacts for relay 2 (W2).
Dry contacts for relay 2 (W2).
Typica...

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