1 Zone Switching Relay Zoom

1 Zone Switching Relay

SKU:SR501-2

Brand: Taco

Taco
Qty Price
$47.95
/ each
$179.80 / box (4 units x $44.95)
In Stock! Ships in 24-48 Hours
298 Available

Specs

Zones:
?
1
Width: 4-1/4"
Height: 5-1/4"
Depth: 2-3/4"
Amperage:
?
7.2
Application: Zoning
Power Method: 120 VAC Input
Voltage:
?
120 VAC

Description for Taco SR501-2


Taco Switching Relays combine clearly-labeled PC board layouts with advanced features that allow you to completely customize your system. And whether you're using basic priority switching, Taco Plug-In PowerPort Cards or add-on power controls, tailoring the system has never been easier. External indicator lights give you instant diagnostic feedback, making service calls or new installation start-ups a snap. All switching relays are UL listed, use standard "ice cube" replaceable relays and are compatible with conventional and programmable thermostats. For larger jobs, switching relays can be expanded up to 20 zones with priority. With the exclusive Taco PowerPort Plug-In Cards, you can easily add such features as post purge, priority protection and pump exercise. Any expandable switching relay can also interface with the Boiler Reset Control and Injection Mixing Add-On Power Controls. Mix-and-match as needed to customize the system.
Features include:
External Indicator Lights
Switchable Priority
Simplified Wiring
Fully Enclosed Snap-Out Relays
Compact Design
Fuse Protected
100% Factory Tested
Isolated End Switch
Contractor Friendly PC Board Layout
Universal Thermostat Compatibility
UL and CSA Approved
24 Volt Power Input or Output Terminal
Extended 3 Year Warranty
Made in the USA

1 Zone Switching Relay

REVIEW SNAPSHOT®

by PowerReviews
Taco3 Zone Switching Relay
 
4.8

(based on 41 reviews)

Ratings Distribution

  • 5 Stars

     

    (34)

  • 4 Stars

     

    (7)

  • 3 Stars

     

    (0)

  • 2 Stars

     

    (0)

  • 1 Stars

     

    (0)

100%

of respondents would recommend this to a friend.

Reviewed by 41 customers

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Displaying reviews 1-10

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5/7/2012
 
4.0

Good

By Paul the tech

from CT

Verified Buyer

Comments about 4 Zone Switching Relay:

This product works well just installed it I love the way it works and responds very well with Honeywell controls very nice zone control

Bottom Line Yes, I would recommend this to a friend

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4/17/2012
 
5.0

Taco is Great!

By JW

from Chicago, Il

Verified Buyer

Comments about 3 Zone Switching Relay:

My entire house/garage runs on Taco. They run likd clockwork.

Bottom Line Yes, I would recommend this to a friend

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3/28/2012
 
5.0

Simple to Install

By Know_It_All

from Ferndale, CA

Verified Buyer

Comments about Taco 2 Zone Switching Relay:

I found this to be pretty simple to install as I have experience in household wiring. The directions do no show the external connections to any degree and assume that you know that type of information. If you do not, you may be better off having the unit installed by an electrician or plumbing expert.

The switching relay is almost fool-proof and should last for many years. I have one that was installed for 11 years and still running fine.

Bottom Line Yes, I would recommend this to a friend

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3/19/2012
 
5.0

I would purchase this product again

By Radiator Man

from Lincoln,Maine

Verified Buyer

Comments about 1 Zone Switching Relay:

This product replaced the same one that stopped working .

Bottom Line Yes, I would recommend this to a friend

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2/13/2012
 
5.0

Excellent Choice for Switching Circs

By swartz1234

from Auburn, PA

Verified Buyer

Comments about 1 Zone Switching Relay:

I used this relay to control two large circlulators on/off based on the thermostat signal from my zone controller. My system is more complicated than most with an outdoor wood furnace supplying my primary heat through a heat exchanger into the closed oil boiler loop with oil boiler backup. When the heating zones call for heat, this relay switches on the outdoor loop and the boiler loop. The heating zones feed off the boiler loop with their own circs. This was simple to install and works flawlessly. I highly recommend it for any situation where simple circulator switching is needed.

Bottom Line Yes, I would recommend this to a friend

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2/8/2012
 
5.0

Excellent Relay

By davehoot

from Freehold NJ

Verified Buyer

Comments about 1 Zone Switching Relay:

Works great in my radiant floor system. Easy to read instructions will buy again

Bottom Line Yes, I would recommend this to a friend

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1/5/2012

(0 of 1 customers found this review helpful)

 
5.0

Works well easy to install

By Joe

from Sayville

Verified Reviewer

Comments about 3 Zone Switching Relay:

This device was easy to install, the manual was informative, and it works well. This is my second year with this device.

Bottom Line Yes, I would recommend this to a friend

(0 of 1 customers found this review helpful)

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12/26/2011
 
5.0

Wonderful, Simple Controller

By SEE

from Oakhurst, NJ

Verified Buyer

Comments about 3 Zone Switching Relay:

I replaced three old relays, all into one compact unit. The incentive was to have an installation that would run the boiler only when one of the zones is calling for heat. It was so easy to install; the hookups were absolutely clear. Works perfectly.
The price from PexSupply was the lowest I could find. Some suppliers charged more than an hundred dollars more.

Stanley

Bottom Line Yes, I would recommend this to a friend

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12/21/2011
 
4.0

Works as promised!

By CBradley

from White Rock, BC

Verified Buyer

Comments about 1 Zone Switching Relay:

Documentation for this product is great, and no failures in the 20 or so days I've been using it! ;-)

My only complaint is that it gives off quite a hum...

Bottom Line Yes, I would recommend this to a friend

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12/9/2011
 
5.0

Good product

By Jim

from McPherson, KS

Verified Buyer

Comments about 3 Zone Switching Relay:

I had a single zone controller and added another zone so I purchased this three zone controller. Excellent product and easy to figure out on the installation. I should have bought this is the first place. Again, this is a solid product.

Bottom Line Yes, I would recommend this to a friend

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Q&A: Ask the Questions, share answers

Do you have questions about this product?

get answers from real customers and in-house experts with AnswerBox.

38 Questions | 63 Answers
Displaying questions 1-10Previous | Next »
  • 1 Zone Switching Relay

    Q:

    Can this relay be installed in any position or must it be installed upright... Thanks
    Asked on 5/11/2012 by Mondo

    8 answers

    • VERIFIED BUYER

      A:

      you may install in any position as long as you can get cover off

      Answered on 5/14/2012 by Anonymous

    • VERIFIED BUYER

      A:

      It can be installed in any position.
      Phelps Clarke

      Answered on 5/13/2012 by Anonymous

    • VERIFIED BUYER

      A:

      Installing in any position will be fine.

      Answered on 5/12/2012 by Anonymous

    • VERIFIED BUYER

      A:

      Any position is fine.

      Answered on 5/12/2012 by Anonymous

    • VERIFIED BUYER

      A:

      It will function in any position

      Answered on 5/12/2012 by Anonymous

    • VERIFIED BUYER

      A:

      This is an electronic control so it technically can be installed in any
      direction (except that the back must be against the wall). That said,
      it is slightly better to install it in the intended direction so that
      lights are visible and labels are readable.

      Answered on 5/11/2012 by Anonymous

    • VERIFIED BUYER

      A:

      It can be installed in any position.

      Answered on 5/11/2012 by Anonymous

    • VERIFIED BUYER

      A:

      Any Position.

      Answered on 5/11/2012 by Anonymous
  • 3 Zone Switching Relay

    Q:

    I am setting up a 3 zone system (a pump for each zone). It is a closed loop system, so there is a heat exchanger with a separate pump on the domestic side that will provide heat for the radiant side. I will need this 'fourth' pump to loop hot water through the hear exchanger whenever heat is needed. How do I get that 4th pump to come on whenever any of the three zones call for heat? Thanks
    Asked on 5/5/2012 by Homeowner Dan from Indian Hills, CO

    10 answers

    • VERIFIED BUYER

      A:

      there are many ways you could do this and it will really depend on your
      design. You can have a temperature sensor, you could have a flow sensor or
      you could have your heater control that last pump. I do not have this
      design in my house but I would first try to define what you want the
      heat exchange loop to monitor. I tend to stay away from heat exchanges as
      they are inefficient and there is probably simpler way to design.

      Answered on 5/9/2012 by Another PexSupply Customer

    • VERIFIED BUYER

      A:

      If you are using a taco or smiler relay us the "TT" thermals and hook up a
      24 volt coil relay to fire the heat exchanger pump. I like the MacDuffco
      MDR2400 (SPDT) relay in this application.

      Answered on 5/8/2012 by Another PexSupply Customer

    • VERIFIED BUYER

      A:

      Do you have a relay for the 4th pump? You will need it for the radiant side. You can have this setup to turn on when the other switch on the main heat unit.

      Answered on 5/7/2012 by Another PexSupply Customer

    • VERIFIED BUYER

      A:

      There is a relay contact that is enegized whenever any of the zones are activated. This set of relay contacts can be used to power the pump that puts hot water into the heat exchanger.

      Answered on 5/7/2012 by Another PexSupply Customer

    • VERIFIED BUYER

      A:

      When any of the zones calls for heat, the "solated end switch (X1 and X2) will start the boiler" - that is, the wires from X1 and X2 go to the "TT" on the Aquastat controller to turn on the boiler. You may be able to run wires in parallel from X1 and X2 to your 4th pump so it also goes on when any of the zones go on. (Caveat - I am a DIYer!)

      Answered on 5/7/2012 by Another PexSupply Customer

    • VERIFIED BUYER

      A:

      I'm not 100% sure what you are doing, but it sounds like you are using a domestic hot water heater to heat an in-floor (radiant) system. If you are using the pump controller shown in the picture below, there should be an output to turn the boiler on. Just wire your 4th pump up like it were the boiler.
      John White
      Process Engineer | Pioneer Surgical

      Answered on 5/7/2012 by Another PexSupply Customer

    • VERIFIED BUYER

      A:

      Have you looked at the Taco Zone Control Modules (e.g. ZVC403-2)? These normally are used to control zone valves, but can also be wired to drive a switching relay. The modules contain their own relays to control the 'boiler' pump, which is the 4th pump in your scenario.

      Answered on 5/5/2012 by Another PexSupply Customer

    • VERIFIED BUYER

      A:

      Use an SR 501. Take the TT out from the SR503 to the thermostat input on
      the SR 501. The output from the SR 501 can power the fourth pump and
      turn on a boiler.

      Answered on 5/5/2012 by Another PexSupply Customer

    • VERIFIED BUYER

      A:

      TT (X X) on the SR-503 control will close a dry contact to run (trigger) an additional relay for the "boiler" circ pump. I recommend using a Taco 501 relay to keep the installation simple.
      Hazard Stewart
      Newport Geothermal, LLC

      Answered on 5/5/2012 by Another PexSupply Customer

    • VERIFIED BUYER

      A:

      Use a fan center (coil/relay) wired to each zone end switch, you can also
      use transformer to power valves

      Answered on 5/5/2012 by Another PexSupply Customer
  • 3 Zone Switching Relay

    Q:

    my question is related to wiring my 3 zone valves(erie w/wire leads, 2 black + 2 red) to my relay switch. i also have a thermostat for each zone. But i only have 1 pump to run the 3 zones. how is all this wired in????
    thanx in advance.
    Asked on 2/22/2012 by gordie from bedford, qc

    1 answer

    • CUSTOMER CARE

      A:

      it sounds like you need a three-zone zone valve control rather than a three-zone switching relay. Switching relays are meant for applications that use a separate circulator pump for each zone and do not incorporate zone valves. Installations like yours (that use a single circulator for the entire system along with an individual zone valve for each zone) call for a zone valve control. The Taco part that we'd recommend is model ZVC403-2.

      Answered on 2/22/2012 by PexSupply Staff from NY
  • 1 Zone Switching Relay

    Q:

    I want to control one extra zone pump(for my garage) which is in another location than the rest of the system. Do I need this switch and a thermostat (which one?) or is there a simpler and more economical way? Thank you
    Asked on 1/27/2012 by HenrikB from Huntingdon PA

    1 answer

    • CUSTOMER CARE

      A:

      It would probably be easiest to use this control along with a low-voltage thermostat. It's also possible to wire a line-voltage thermostat in the electrical line to the circulator, but this is more complicated and would probably require the assistance of an electrician.

      Answered on 1/31/2012 by PexSupply Staff from NY
  • 6 Zone Switching Relay

    Q:

    I WOULD LIKE TO CONTROL 5 PUMPS WITH AN SR506-2.
    THE TOTAL DRAW FROM THE PUMPS IS 20.31 AMPS BUT THE UNIT IS ONLY RATED FOR 20AMPS.
    WILL IT BE OK TO USE THE SR506-2 OR SHOULD I USE A 2 AND A 4?
    Asked on 1/11/2012 by BOB from NEW ENGLAND WOOD PELLET, JAFFREY, NH.

    1 answer

    • CUSTOMER CARE

      A:

      We recommend that you use two SR503-EXP models. This will allow you to link the two switching relays together.

      Answered on 1/12/2012 by PexSupply Staff from NY
  • 6 Zone Switching Relay

    Q:

    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 on 11/30/2011 by Anonymous

    1 answer

    • CUSTOMER CARE

      A:

      A 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.

      Answered on 11/30/2011 by PexSupply Staff from NY
  • 1 Zone Switching Relay

    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 on 11/23/2011 by Anonymous

    2 answers

    • CUSTOMER CARE

      A:

      You would most likely be best off using a 4-zone switching relay. Multiple -EXP units can also be combined.

      Answered on 12/2/2011 by PexSupply Staff from NY

    • A:

      If you have a 4th zone you should stick with a 4- way.

      Answered on 12/13/2011 by Anonymous from None
  • 3 Zone Switching Relay

    Q:

    Sr503 power light green, but all 3zone lights red. What does this mean?
    Asked on 11/19/2011 by Anonymous

    2 answers

    • CUSTOMER CARE

      A:

      The red light would indicate that zone is calling for heat.

      Answered on 11/23/2011 by PexSupply Staff from NY

    • A:

      All three zones are getting the signal from their thermostats. Their pumps should be running/the heat should be on.

      Answered on 1/5/2012 by Joe from Sayville
  • 4 Zone Switching Relay

    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 on 11/13/2011 by Anonymous

    2 answers

    • VERIFIED BUYER

      A:

      The main power should come from the taco control

      Answered on 5/7/2012 by Paul the tech from CT

    • CUSTOMER CARE

      A:

      Normally the power for the zone circulators will come from the switching relay.

      Answered on 11/16/2011 by PexSupply Staff from NY
  • 1 Zone Switching Relay

    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 on 11/13/2011 by leo

    1 answer

    • CUSTOMER CARE

      A:

      You will tie the extra end switch in the ZVC control to the TT connection in the SR control.

      Answered on 11/16/2011 by PexSupply Staff from NY
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