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Taco SR506-5 Instruction Sheet

Switching relay
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SUPERSEDES: New
For information on Taco's Switching Relays (SR) including catalog sheet, instruction sheets, Visio stencils
and our highly praised Zone Controls Wiring Guide, scan the QR code to the left or go to our website:
www.TacoComfort.com.
Overview:
The SR506-5 is a six zone switching relay that can have up to 6 thermostats
connected and will operate up to 6 zone circulators, plus 2 auxiliary outputs (AUX) to
control circulators; like boiler and primary loops.
The SR506-5 has a priority zone option, allowing zone 1 to operate and deactivate
zones 2 through 6 during a priority call; this is ideal for when using an indirect water
heater.
The SR506-5 includes timing options for Post Purge, Pump Exercise and Priority
Protection. The SR506-5 includes an energy saving program that can adjust the
temperature of a modulating-condensing boiler or conventual On/Off boiler to
increase the comfort level and use less fuel, without the need to install an outdoor
sensor.

Table of Contents

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Plant ID # 9300-4099
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12. Warranty
EFFECTIVE: February 17,2021
102-571

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Summary of Contents for Taco SR506-5

  • Page 1: Table Of Contents

    Zone Controls Wiring Guide, scan the QR code to the left or go to our website: www.TacoComfort.com. Overview: The SR506-5 is a six zone switching relay that can have up to 6 thermostats connected and will operate up to 6 zone circulators, plus 2 auxiliary outputs (AUX) to control circulators; like boiler and primary loops.

  • Page 2: Warnings & Safety Information

    1. Warnings & Safety Information: FCC Regulatory Statements This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference. (2) This device must accept any interference received, including interference that may cause undesired operation. This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the Federal Communication Commission (FCC) rules.

  • Page 3: Location & Installation

    2. Location & Installation: Planning: Included in Package: SR506-5 switching relay; six zone Instruction sheet 2 Spare fuses attached to inner cover Strap-on temperature sensor Tools & Material Needed: Small straight blade screwdriver Screws or hardware for mounting Phillips screwdriver...

  • Page 4: Operation & Dip Switch Settings

    1, 2, 3 on the master control to the corresponding 1, 2, 3 on the expansion zone control(s). Zone controls may be daisy chained up to 20 Taco zoning panels using any combination of SR and ZVC controls (120 zones if all are 6 zone panels).

  • Page 5: Wiring Procedure

    4. Wiring Procedure: End Switches (Low Voltage Dry Contacts): Main The main end switch closes when any zone thermostat calls for heat and connects to T-T on boiler operating control. MAIN PR IORIT Y BO ILER BO ILER Priority The priority end switch closes only when the priority zone thermostat SWITC H SWITC H or aquastat is calling for heat and connects to DHW T-T on boiler (optional).

  • Page 6: Product & Applications Diagrams

    Product & Applications Diagrams: PA01-C - SR506-5 with 5 Zone Circulators & Indirect DHW; Supply & Return Headers Mechanical Diagram Electrical Diagram Dip Switch Settings 1. OFF - Master 2. ON - Priority 3. OFF - Primary Pump 4. OFF or ON - Post Purge 5.
  • Page 7 PA02-C - SR506-5 with 5 Zone Circulators & Indirect DHW; Primary/Secondary Mechanical Diagram Electrical Diagram Dip Switch Settings 1. OFF - Master 2. ON - Priority 3. OFF - Primary Pump 4. OFF or ON - Post Purge 5. OFF or ON - Pump Exercise 6.
  • Page 8 PA03-C –High & Low Temp Temperature Zones & Indirect DHW; Primary/Secondary Mechanical Diagram Electrical Diagram Dip Switch Settings; Master Dip Switch Settings; Expansion 1. OFF - Master 1. ON - Expansion 2. ON - Priority 2. OFF - Priority 3. OFF - Primary Pump 3.
  • Page 9 PA04-C – Oil Fired Boiler with Tankless Coil; Supply & Return Headers Mechanical Diagram Electrical Diagram Dip Switch Settings 1. OFF - Master 2. OFF - Priority 3. OFF - Primary Pump 4. OFF or ON - Post Purge 5. OFF or ON - Pump Exercise 6.

  • Page 10: Reset Control Setup & Wiring

    Control Setup: The Taco eLink mobile app is required to set type of reset control and parameters to operate. See section 7 for more information on the Taco eLink mobile app.

  • Page 11: The Taco Elink Mobile App

    Advanced Control & Monitoring Options: The Taco eLink mobile app is required for advanced control functions and parameters to operate. Search for Taco eLink within the App Store or Google Play on your mobile device to download the mobile app.
  • Page 12 The eLink APP...
  • Page 13 The eLink APP...

  • Page 14: Troubleshooting & Faq's

    Trouble Shooting & FAQ’s For your convenience, the Taco Tech Support team is available anytime 24/7. Just call 401- 942-8000 for help. Problem: Digital thermostats do not work correctly when connected to a switching relay. Solution: Some thermostats are a “Power Stealing” type which means they are powered by the switching relay with just 2 wires (R &...

  • Page 15: Specifications

    10. Specifications: Power and Electrical Ratings: Environmental Ratings: Power Supply: 120VAC ±10%, 60Hz, 20A Ambient Temperature Rating: Zone Pump Output Rating: 32°F to 104°F (0°C to 40°C) Operating Humidity Range (% RH): 120 Vac, 1/6 HP AUX(s) Pump Output Rating: 5 to 90% RH, noncondensing Sensor Temperature Rating: 120 Vac, 1/6 HP...
  • Page 16 PRODUCTS OR ANY INCIDENTAL COSTS OF REMOVING OR REPLACING DEFECTIVE PRODUCTS. If in doubt as to whether a particular substance is suitable for use with a Taco product or part, or for This warranty gives the purchaser specific rights, any application restrictions, consult the applicable...

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