3 Zone Switching Relay w/Priority & 3 Powerports Zoom

3 Zone Switching Relay w/Priority & 3 Powerports

SKU:SR503-EXP-1

Brand: Taco

Taco
Qty Price
$179.95
/ each
In Stock! Ships in 24-48 Hours
2 Available

Specs

Zones:
?
3
Width: 10-1/4"
Height: 6-3/4"
Depth: 2-3/4"
Amperage:
?
20.0
PowerPort Slots: 3
Power Control Plugs: 1
Application: Zoning
Amperage:
?
20.0
Power Method: 120 VAC Input
Voltage:
?
120 VAC

Description for Taco SR503-EXP-1


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

3 Zone Switching Relay w/Priority & 3 Powerports

REVIEW SNAPSHOT®

by PowerReviews
Taco3 Zone Switching Relay w/Priority & 3 Powerports
 
5.0

(based on 3 reviews)

Ratings Distribution

  • 5 Stars

     

    (3)

  • 4 Stars

     

    (0)

  • 3 Stars

     

    (0)

  • 2 Stars

     

    (0)

  • 1 Stars

     

    (0)

100%

of respondents would recommend this to a friend.

Reviewed by 3 customers

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Displaying reviews 1-3

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9/22/2011
 
5.0

easy install

By DIY

from South Dakota

Verified Buyer

Comments about 3 Zone Switching Relay w/Priority & 3 Powerports:

Used on my replacement cold start boiler that had only one pump input on control board. I have two pump controlled zones and wanted to able to add indirect water heater with the 3rd zone priority in the future, so it filled the bill. Also has a lot of expansion capabilities that I probably won't every use, but who knows..

Bottom Line Yes, I would recommend this to a friend

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6/30/2011
 
5.0

Great Product

By Eliad

from Great Falls, MT

Verified Buyer

Comments about 3 Zone Switching Relay w/Priority & 3 Powerports:

I replaced 3 Honeywell relays with this product. The wiring for this Taco is much simpler and it does have one relay with priority. Very happy with this purchase.

Bottom Line Yes, I would recommend this to a friend

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11/2/2010
 
5.0

Clean install with plenty of options

By FHDogs

from S. VT

Verified Reviewer

Comments about Taco 6 Zone Switching Relay w/Priority & 3 Powerports:

Previously my heating system had 3 single zone relays which made for unattractive, difficult to maintain wiring. This unit allowed for a neater installation with the ability to add future zones by dividing one large existing zone.

The ability to use PowerPort cards, and add addition slave relays makes this an all in one solution for any multi-zone heating system.

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.

12 Questions | 23 Answers
Displaying questions 1-10Previous | Next »
  • 3 Zone Switching Relay w/Priority & 3 Powerports

    Q:

    I have this existing relay on my furnace (New) The furnce is 62 years old ( American Standard) and by Fall I will replace with a Buderus G115WS4. I know you recommend the Honeywell but will my existing Taco work?

    Thanks
    Asked on 5/3/2012 by Mike from Westwood, MA

    5 answers

    • CUSTOMER CARE

      A:

      This switching relay will work as long as you are zoning by circulator.

      Answered on 5/23/2012 by PexSupply Staff from NY

    • VERIFIED BUYER

      A:

      Most likely it would work fine. This switch have a contact that turns
      on the furnace when needed. Since this switch is a modern technology
      most likely will be compatible with your new furnace.

      Answered on 5/3/2012 by Another PexSupply Customer

    • VERIFIED BUYER

      A:

      The Taco pump control relay will work.
      Just be sure to wire the priority zone for the hot water if you are doing
      an indirect.
      Stan

      Answered on 5/3/2012 by Another PexSupply Customer

    • VERIFIED BUYER

      A:

      Yes, it will work.

      Answered on 5/3/2012 by Another PexSupply Customer

    • VERIFIED BUYER

      A:

      Yes it should
      Sent from my iPhone

      Answered on 5/3/2012 by Another PexSupply Customer
  • 4 Zone Switching Relay w/Priority & 3 Powerports

    Q:

    what is the best thermostat to use with the Taco 4 zone with four zones to operate
    Asked on 4/17/2012 by Madhatter from Brentwood, CA

    8 answers

    • CUSTOMER CARE

      A:

      Taco switching relays work with any low-voltage thermostats, so you have plenty of options. You need to decide whether you want programmability, a digital display, cooling capability, etc.

      Answered on 4/19/2012 by PexSupply Staff from NY

    • VERIFIED BUYER

      A:

      Any thermostat will work (digital or dial).
      Sent from my iPhone

      Answered on 4/18/2012 by Another PexSupply Customer

    • VERIFIED BUYER

      A:

      Any

      Answered on 4/18/2012 by Another PexSupply Customer

    • VERIFIED BUYER

      A:

      I have used the Wirsbo thermostats with good success.

      Answered on 4/17/2012 by Another PexSupply Customer

    • VERIFIED BUYER

      A:

      I have a Taco 4 zone and I am using the Honeywell ForcusPro
      programable thermostat. These suit my purpose. However, if you are
      willing to spend the money there are some pretty fancy thermostats
      available. Some have motion detection and will change the setting
      when someone walks into the room. Others can be set with an app on
      your smart phone.
      Arthur Alexander
      Elkins Park, PA

      Answered on 4/17/2012 by Another PexSupply Customer

    • VERIFIED BUYER

      A:

      Any thermostat will work great with this unit. If you are looking for a
      setpoint controller for a floor sensor or something like that I use the
      Tekmar series on setpoint controllers. If you are just looking for a basic
      thermostat you don't need to spend a lot of money on that, a cheapy from
      Home Depot will work great.

      Answered on 4/17/2012 by Another PexSupply Customer

    • VERIFIED BUYER

      A:

      Any thermostat will work with the Taco control. Which one to choose depends
      on your application, whether you want programmability, both heat and cool
      control, your budget, etc. If replacing old battery powered tstats make
      sure you have enough conductors in the cable to operate a new line powered
      Tstat properly. You should consult with an electrician or heating contractor
      if unsure.

      Answered on 4/17/2012 by Another PexSupply Customer

    • VERIFIED BUYER

      A:

      If its a straight forward hydronic radiant heat application, I'm using Uponor A3030101 heat-only, two wire thermostats. They're inexpensive and work with the the Uponor actuators in using. I actually bought this and didn't realize it was the 120v version and bought the ZVC406EXPs that use 24v for the actuator side.
      -Jonathan

      Answered on 4/17/2012 by Another PexSupply Customer
  • 3 Zone Switching Relay w/Priority & 3 Powerports

    Q:

    I need a switch for my wood boiler system. I have two zones controlled by zone valves and a Grundfos Alpha pump, and I have a domestic water heater with a circulator. Will this switch take care of both or do I need two seperate switches? If yes, which ones? Thank you.
    Asked on 12/7/2011 by Henrik from Huntingdon PA

    1 answer

    • CUSTOMER CARE

      A:

      You would need two separate controls. We would recommend a ZVC403-2 for the zone valves (no two-zone ZVC is available) and a SR502-2 for the circulators (with the DHW circulator given priority). You can tie the end switch on the zone valve control into the thermostat terminal on the switching relay.

      Answered on 12/7/2011 by PexSupply Staff from NY
  • Taco 1 Zone Switching Relay w/Priority & 3 Powerports

    Q:

    What type of wire should I be using to wire up the expansion ports between a SR503-Exp and an SR501-EXP?
    Asked on 12/4/2011 by CoreyZ from Richmondville, NY

    1 answer

    • A:

      To wire the expansion ports on the 1 Taco Zone Switching Relay w/Priority & 3 Powerports you can use any 18 AWG wire, with up to four connectors.

      Answered on 12/8/2011 by Anonymous from None
  • 3 Zone Switching Relay w/Priority & 3 Powerports

    Q:

    can i use this to control a wood fired boiler? it would have 2 heating zones and 1 heat dump zone controled by aquastat for when 2 heat zones are not calling for heat I will use a seperate pump to each of the 3 zones. thank you
    Asked on 10/15/2011 by klem from Coudersport, Pa

    1 answer

    • CUSTOMER CARE

      A:

      Yes, this control will work if you are using zone pumps.

      Answered on 10/18/2011 by PexSupply Staff from NY
  • Taco 6 Zone Switching Relay w/Priority & 3 Powerports

    Q:

    I am planning to install a system with 6 zones and a circulator on each zone. Will this unit be able to supply 120 V to each circulator?
    Asked on 9/30/2011 by Dane from Prince George, BC

    1 answer

    • CUSTOMER CARE

      A:

      Yes, it will.

      Answered on 10/4/2011 by PexSupply Staff from NY
  • Taco 6 Zone Switching Relay w/Priority & 3 Powerports

    Q:

    hi, I would like to purchase the taco SR506 to replace my 503 to increase my ability to add more zones. I printed out the wiring diagrams for the SR506 and I'm not sure how to duplicate how the jumpers would be like they are on my 503. The 503 has a jumper that goes from P-ZC-H-X1. X2 goes to the aqustat which goes to the power vent For the boiler. My boiler is a Biasi cold start. Your help would be appreciated. Thanks
    Asked on 6/11/2011 by Anonymous from Carmel,Maine

    1 answer

    • CUSTOMER CARE

      A:

      The SR506 has a switch inside of it instead of a jump. The switch acts like the jumper in the 503.

      Answered on 6/13/2011 by PexSupply Staff from NY
  • 4 Zone Switching Relay w/Priority & 3 Powerports

    Q:

    i want to run the thermostats and circ. pumps independant of the boiler, the biomass boiler is completly controlled by the internal water temp will the unit handel this application
    Asked on 1/24/2011 by ian from berne ny

    1 answer

    • CUSTOMER CARE

      A:

      Yes, you will not hook the switching relay's end switch to anything.

      Answered on 1/31/2011 by PexSupply Staff from NY
  • 4 Zone Switching Relay w/Priority & 3 Powerports

    Q:

    I currently have a SR503 switching relay and am adding 4 more zones. I would like to buy a SR504-EXP so I can add a reset controller later on but am woundering if I can use the expandable as my master and use the current sr503 as the slave but am not sure how to wire it or if its possible?
    Asked on 12/19/2010 by Chad from Sheboygan, WI

    1 answer

    • CUSTOMER CARE

      A:

      You cannot do what you are describing, as you can only connect EXP's to EXP's.

      Answered on 1/5/2011 by PexSupply Staff from NY
  • 3 Zone Switching Relay w/Priority & 3 Powerports

    Q:

    i want to install an SR503 switching relay to our heating system, does it get mounted directly to the exterior of the boiler or on the nearest wall? Also, do I need zone valves when i have individual pumps for each zone?
    Asked on 12/10/2010 by Anonymous

    1 answer

    • CUSTOMER CARE

      A:

      The control can be mounted where ever you like. In regards to your second question, you do not need zone valves when zoning by circulators.

      Answered on 12/14/2010 by PexSupply Staff from NY
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