Local Pickup FAQ's
+
Share This Product
Features
- Simple Servicing
- Easy-to-interpret external diagnostic lights and "ice cube" style replaceable relays mean that servicing a Taco switching relay is always easy.
- Protected Priority Switching
- With the SR503-4, a single zone may be designated as a priority zone whose heating demands are given precedence over other zones. Other demands will be met when the priority zone is satisfied or after sixty minutes of priority operation.
Taco's SR503-4 is a three zone pump switching relay. With universal thermostat compatibility, it is designed to integrate quickly and effortlessly into any hydronic system, bringing Taco reliability to your zoned operations. The SR503-4's enclosure is unobtrusive and easy to mount in tight spaces, and the PC board was designed for quick maintenance and clean, simple wiring.
California residents see
Warning: This product can expose you to chemicals including Lead which is known to the State of California to cause Developmental Harm.
For more information go to: www.p65Warnings.ca.gov
Specifications
SR503-4
Overview
Product Category
Thermostats and Controls
UPC
687752857566
General Information
Product Category
Thermostats and Controls
Number of Zones
Number of Zones
A zone is a room or area within a building that has its own temperature control.
3
Electrical Data
Voltage
120 Volts
Phase
1
Frequency
60 Hz
Maximum Load
15 Amps
Dimensions
Product Height
7 Inches
Product Width
10 3/4 Inches
Product Depth
2 3/4 Inches
Shipping Weight
4 Pounds
Certifications
UL Listed
Yes
Warranty Information
Warranty
Warranty
A warranty is a safeguard from defects in manufacturing and can vary in length and terms. To see the manufacturer's warranty statement, click on the Manuals tab. Learn More
3 Years
Reviews
Taco SR503-4 Reviews & Ratings
Be the First to Write a Review
Do you own this product?
Please share your insights with fellow shoppers.
Please share your insights with fellow shoppers.
Product Q&A
(1)
Product Questions
Answered by Ken, the eComfort Product Expert
Have a Lochinvar boiler with a DHS tank and one circulator pump feeding an air handler. Need to add another line with a 2nd circ pump. Will this SR504 work? That will give me 4 pumps then, the hot water, boiler, and the two circs. If this one won't work what would you suggest.
Robert
from Alaska
October 07, 2015
How-To Articles
How to Pick the Perfect Thermostat
Today's thermostats are more than just the “brain” of your heating ...
An Intro to Tekmar Controls
Getting the most out your hydronic heating system can be difficult. Luckily, Te...
Mini Split HVAC Thermostats and Controls
If you're buying a ductless mini split system, then you appreciate the quiet, e...
Manuals
Ask A Question!
*Required Fields
+
Thank You For Submitting Your Question
Your submission has been sent successfully. Please give our experts up to two business days to respond.
Media Gallery
Taco Zone Switching Relay - Three Zones
Customer Review Images