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MANUALS (1)
Product Highlights
Description
The Taco SR506-5 Switching Relay is the best choice for all your zoning needs, with advanced PowerPort Cards, external diagnostic lights, switchable priority and contractor friendly PC board layouts. Combined with the time proven reliability of the 00 family of circulators and thermostats, total system integrating is achieved. External indicator lights provide instant diagnostic feedback, making a snap of service calls or new installation start-ups.
- 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 six zone panels)
- Taco Control Mobile App (not Required for all functions)
- Wireless Update Capabilities
- Four Programmable Outputs
- DHW Recirculation Smartplus Logic
- Diagnostic Lights for All Outputs
- Additional Space for Wiring
- More Space To Write Zone Information
- Easy to Remove Hinged Cover
- Rear Knockouts
- Standard Control Upgradeable
Specs
| Depth (Inches): | 3" |
|---|---|
| Width (Inches): | 11-3/4" |
| Height: | 7-1/2" |
| Amperage: | 20 |
Questions?
Product Reviews
Most Liked Positive Review
Zones!
Most Liked Negative Review
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Fairly good. Could be better.
Broke down in the first season
I would not buy again
This zone controller is what i needed
Good product
Solid product.
Works great
Best product
6 Zone Relay for Circulator Pumps
I would buy this again
Great price and fast shipping.
Product Q&A
53 QuestionsQ: can i operate a circulator pump like a zone valve using a control box ? or do i need relays for each to power the cir. pumps when the therm calls for heat?
Asked by 15 years ago
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Verified Reply- PexSupply StaffA switching relay works with circulator pumps as a zone valve control module works with zone valves. The SR506 can control up to 6 pumps if you are zoning by circulator.
Q: i have a taco 3 zone im try to hook up the 4th zone . do i need to buy a 4 zone taco or is ther a cheeper way
Asked by 15 years ago
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Verified Reply- PexSupply StaffYou would most likely be best off using a 4-zone switching relay. Multiple -EXP units can also be combined.
If you have a 4th zone you should stick with a 4- way.
Q: Sr503 power light green, but all 3zone lights red. What does this mean?
Asked by 15 years ago
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Verified Reply- PexSupply StaffThe red light would indicate that zone is calling for heat.
All three zones are getting the signal from their thermostats. Their pumps should be running/the heat should be on.
Q: Hi. I have a zvc 406 with priority installed in my boiler. It powers 4 zones, being the inderect water heater the priority zone. Priority switch is turned off. There are two extra zones. Id like to hook up the infloor zone to one of the zvc 406 extra zones and have the sr501 power the circulator on for the infloor. Do i just tie in the extra end switch from the zvc 406 to the switching relay? if so, where is it? i dont see an end switch on it, only on the sr501 exp. Thanks
Asked by leo 15 years ago
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Verified Reply- PexSupply StaffYou will tie the extra end switch in the ZVC control to the TT connection in the SR control.
Q: i have a munchkin contender boiler and dhw.4 zones of heat with a main circulating pump which needs to come on when each tt calls for heat .does the line voltage for this pump come from the taco or boiler .
Asked by 15 years ago
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Verified Reply- PexSupply StaffNormally the power for the zone circulators will come from the switching relay.
The main power should come from the taco control
Q: I have this relay installed. It is the non-exp model. I want to take the one of the zones and split it into three other zones running off the same circulator. I will control the three new zones using zone control valves. I have a tankless coil for DHW. How do I go about wiring this up? Do I need to buy extra controllers? Thanks, Craig
Asked by Craigabooey 15 years ago
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Verified Reply- PexSupply StaffYou will need a Taco Zone Valve Controller. You will wire the end switch of the zone valve controller to the thermostat connect on your switching relay.
Q: I am installing radiant floor heating for one room. The heat source will be a tankless heater, this is one zone. So how and what to I use to send 24 volt to the thermostat and power only the taco pump? Thanks for you answers in advance.
Asked by Tom 15 years ago
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Verified Reply- PexSupply StaffThe Taco switching relay will power/control your 24 volt thermostat and power your 120 volt pump. The relay has a built in transformer.
Q: Have a sr502 switching relay. Can I replace the transformer?
Asked by Rich 15 years ago
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Verified Reply- PexSupply StaffTaco does not offer a replacement part for the transformer.
Q: The red and green lights do not come on at all and the Taco is not functioning. Is there a basic troubleshooting sheet available somewhere? Ken
Asked by Kenny the owner 15 years ago
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Verified Reply- PexSupply StaffWe would recommend that you check all the terminals with a volt meter to make sure they are functioning properly and that you also check the cube relays to see whether or not they need to be replaced.
Q: I am setting up a radiant heat system with 2 zones, heat exchanger and 50 gal water heater. Each zone will be on a separate thermostat. I understand how to connect 2 pumps to run 2 separate zones. However I am not sure how to connect the 3rd pump to circulate hot water between water heater and heat exchanger so it turns on whenever one or both termostats call for heat.
Asked by Pawel 15 years ago
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Verified Reply- PexSupply StaffYou will also need a single-zone switching relay that the end switch from the two-zone switching relay will tie into.
You essentially have three zones not two. Set up the DHW loop as the third zone and assign priority. This zone needs an Aquastat to set the desired water temp (usually ~160) I suggest using a pre wired zone controller with priority and follow the wiring plans supplied. You can set your boiler controler for "cold start" since there is no need to maintain 160 degree water in the boiler when no zone calls for heat. The DHW water is kept at the pemperature set by its aquastat. Good luck!