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102-571 

 

 

SUPERSEDES: New                                     Plant ID #   9300-4099                                       EFFECTIVE: February 17,2021 

 

 

 

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 

1.

 

Warnings & Safety Information  

2.

 

Location & Installation  

3.

 

Operation & Dip Switch Settings 

4.

 

Wiring Procedure 

5.

 

Product & Applications Diagrams 

6.

 

Reset Control Setup & Wiring 

7.

 

The Taco eLink mobile app 

8.

 

Troubleshooting & FAQ’s 

9.

 

Inner Cover Removal & Fuses 

10.

 

Specifications 

11.

 

Accessories & Replacement Parts 

12.

 

Warranty  

 

Summary of Contents for SR506-5

Page 1: ...o 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 wit...

Page 2: ...g the FCC radio frequency exposure limits human proximity to the antenna shall not be less than 20 cm during normal operation and must not be co located or operating in conjunction with any other antenna or transmitter ISED Regulatory StatementsThis device complies with ISED Canada license exempt RSS standard s Operation is subject to the following two conditions 1 this device may not cause interf...

Page 3: ...al connectors for field wiring Low and live voltage wiring per code Location Do not mount to a surface that exceeds 104 F 40 C The unit must be only located in dry interior locations Use only copper conductor supply wire suitable for at least 105 C All circuits must have a common disconnect and be connected to the same pole of the disconnect Product is not suitable for installation in hazardous lo...

Page 4: ... is set to ON the solid state timer cycles all the circulating pumps that are attached to the Switching Relay t o run for 30 seconds every 2 weeks More adjustments are available when using the eLink mobile app Low Limit ZC Operation When the dip switch 6 is set to ON and the boiler drops below the set low limit terminal ZC connected to boiler all zone circulating pumps will stop When the boiler ri...

Page 5: ...ZR AUX 1 120 vac H Connect the Hot output to Hot power input on circulator or to ZR see below N Connect the Neutral output to Neutral power input on circulator G Connect ground wire to ground screws on base of zone control Circulator Output Primary AUX 2 120 vac H Connect the Hot output to Hot power input on circulator N Connect the Neutral output to Neutral power input on circulator G Connect gro...

Page 6: ...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 OFF or ON Pump Exercise 6 OFF ZC Low Limit Conceptual Sketches Only refer to individual manufacture s installation instructions for additional d t il L l d h ll il ...

Page 7: ...gram 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 OFF ZC Low Limit Conceptual Sketches Only refer to individual manufacture s installation instructions for additional details Local codes h ll il ...

Page 8: ...sion 1 ON Expansion 2 OFF Priority 3 OFF PrimaryPump 4 OFForON PostPurge 5 OFForON PumpExercise 6 OFF ZCLowLimit PA03 C High Low Temp Temperature Zones Indirect DHW Primary Secondary Mechanical Diagram Electrical Diagram Conceptual Sketches Only refer to individual manufacture s installation instructions for additional details Local codes shall prevail ...

Page 9: ...urces of power may be connected to an oil boiler s aquastat control Beforeservicinganoilfiredboilermakesuretheserviceswitchisoff Thenconfirmthatasecondarysourceofpowerdoesnotexisttotheboiler s aquastatcontrol Failuretofixtheproblemcouldresultinboilerbeingactivatedwhenzonecallsforheat thatcouldresultinseriousinjuryordeath Conceptual Sketches Only refer to individual manufacture s installation instr...

Page 10: ...pp is required to set type of reset control and parameters to operate See section 7 for more information on the Taco eLink mobile app Wiring of Reset Control Remove the inner cover as shown in section 10 page X of this manual to have access to wire Sensor Connections Boiler Sensor A boiler supply sensor is required for either indoor or outdoor reset Wire the supplied strap on sensor to the Boiler ...

Page 11: ...ice to download the mobile app iOS Android OS Follow the app menu to configure advanced features that the Taco new zone controls have to offer including Different levels of access Zone naming Programmable output naming Alerts messages Post purge time delay adjustment Pump exercise time delay adjustment Priority protection time delay adjustment Indoor boiler reset Outdoor boiler reset SmartPlus DHW...

Page 12: ...The eLink APP ...

Page 13: ...The eLink APP ...

Page 14: ...tor a 1000 ohm watt resistor has proven to work with most Problem No heat in a zone or room of building Solution LED diagnostic lights will help find a component that is not working properly The green LED should always be on indicating that power is connected and the solid state fuse is good When there is a call for heat the red LED will come on indicating power to the zone circulator This indicat...

Page 15: ... 5 to 90 RH noncondensing Sensor Temperature Rating 58 F to 230 F 50 C to110 C DIP Switch Timing Settings Post Purge 30 seconds adjustable with mobile app Pump Exercise 30 seconds per 2 weeks of space heating inactivity adjustable with mobile app Thermostat Compatibility Compatible with most mechanical battery operated power stealing power robbing hardwired and Smart thermostats Temperature Sensor...

Page 16: ...whetheraparticularsubstanceis suitableforusewithaTaco productorpart orfor anyapplicationrestrictions consulttheapplicable Taco instructionsheetsorcontactTacoat 401 942 8000 Taco reservestherightto providereplacement productsandpartswhicharesubstantiallysimi lar indesignandfunctionallyequivalenttothe defectiveproductorpart Taco reservestherightto makechangesindetailsofdesign construction or arrange...

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