Universal Switching Relay w/ Internal Transformer Zoom

Universal Switching Relay w/ Internal Transformer

SKU:R8845U1003

Brand: Honeywell

Honeywell
Qty Price
$48.95
/ each
$93.90 / box (2 units x $46.95)
In Stock! Ships in 24-48 Hours
(37 Available)
0

Resources

Specs

Application: Zoning
Zones:
?
1
Width: 4-7/16"
Height: 6-1/4"
Amperage:
?
7.4
Power Method: 120V
Voltage:
?
120v
Hertz: 60
Depth (Inches): 3-1/2"
Ambient Conditions: 0-90% RH non-condensing
-20 F to +120 F
Switch Action: Two SPST
plus PowerPile® rated low voltage SPST relay
Relays: Low Voltage SPST
Thermostat Compatibility: Honeywell Electromechanical
Electronic 2-wire
Electronic 3-wire
Connection Type: 2-Wire
3-wire

Description for Honeywell R8845U1003

Honeywell R8845U1003 is a universal switching relay with internal transformer. This switching relay provides intermediate switching of line voltage and low voltage devices from a line voltage or low voltage controller. It is typically applied in Hydronic heating systems.

Honeywell Universal Switching Relays R8845U with 24 V transformer provide intermediate switching of line-and low-voltage devices from a line- or low-voltage controller and is typically applied in Hydronic heating systems.

Features:

  • Replaceable socketed relays
  • Two troubleshooting LED
  • Push-to-test button
  • Replaceable transformer fuse
  • Low-voltage contact rating for Powerpile applications
  • Long-life DC relay drive control technology
  • Relay for use with external 24 Vac or 24 Vdc supply, with line-voltage control, or with internal 24 V transformer supply
  • One model replaces many competitor models
  • One model may replace many Honeywell models:R182A,B,C,J; R482A,B,C,J; R845; R882A,B,C,J and RA832
  • Includes integral transformer, enclosure
  • Approvals of Canadian Underwriters Laboratories and Underwriters Laboratories Inc.

Universal Switching Relay w/ Internal Transformer

REVIEW SNAPSHOT®

by PowerReviews
HoneywellUniversal Switching Relay w/ Internal Transformer
 
4.7

(based on 6 reviews)

Ratings Distribution

  • 5 Stars

     

    (4)

  • 4 Stars

     

    (2)

  • 3 Stars

     

    (0)

  • 2 Stars

     

    (0)

  • 1 Stars

     

    (0)

100%

of respondents would recommend this to a friend.

Pros

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      Best Uses

          • Primary use:
          • Personal (6)

        Reviewed by 6 customers

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        Displaying reviews 1-6

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        4.0

        Does the job

        By Brian the Gardener

        from Silver Spring, Md

        Verified Buyer

        Pros

          Cons

            Best Uses

              Comments about Universal Switching Relay w/ Internal Transformer:

              I used this to run boiler feed pump for a new indirect hot water heater. The old hot water heater had a line voltage thermostat built in and the new one a 24 volt one. Wiring the switching line voltage for the pump was not straight forward and required installing a short jumper.

              • Primary use:
              • Personal
               
              5.0

              Honeywell Switching Relay

              By Mike

              from East Peoria, IL

              Verified Buyer

              Pros

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                    Comments about Universal Switching Relay w/ Internal Transformer:

                    This was exactly what I needed to connect my boiler to my new indirect water heater and pump.

                    • Primary use:
                    • Personal
                     
                    5.0

                    Just Right for my Unique System

                    By JS

                    from Philly Suburbs, PA

                    Verified Buyer

                    Pros

                      Cons

                        Best Uses

                          Comments about Universal Switching Relay w/ Internal Transformer:

                          As a DIY person and Mechanical/Electrical engineer, after trying to supply local supply houses I came back to online. I want to support the local guys but with reactions from one local guy refusing to even give me a price because he thought I was using it wrong, I found a much better price than another supplier here. Arrived in perfect shape. Wired everything up as intended, while using the additional relay these units have to switch a separate relay for the heat exchanger fans (Unique system, 2 "zones" on one circulated line with no valves...). Been working flawless and didn't have to deal with poor attitudes of local suppliers. Thanks!!

                          • Primary use:
                          • Personal
                           
                          5.0

                          Did what it is designed for

                          By Rob.

                          from New York, NY

                          Verified Buyer

                          Pros

                            Cons

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                                Comments about Universal Switching Relay w/ Internal Transformer:

                                Once the correct part was found on site, purchasing and delivery was no problem. Less money,install easy when taking your time, problem with heat solved.

                                • Primary use:
                                • Personal
                                 
                                5.0

                                easy to install

                                By jonny5

                                from sharpsville pa.

                                Verified Buyer

                                Pros

                                  Cons

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                                      Comments about Universal Switching Relay w/ Internal Transformer:

                                      now I have the third zone in my heating system running independent on the others

                                      • Primary use:
                                      • Personal
                                       
                                      4.0

                                      This controller works as advertised

                                      By Pete

                                      from Harwood, MD

                                      Verified Buyer

                                      Pros

                                        Cons

                                          Best Uses

                                            Comments about Universal Switching Relay w/ Internal Transformer:

                                            I used this product to control an auxiliary external pump for hydronic heating. I used the 24v output control from an external source. The instructions are not geared toward this configuration but the online information specified it could be configured this way. If you can read an electrical diagram you can figure it out. The instructions include numerous examples of other configurations. I think an example of this type would have helpful. This is a versatile controller that is easy to set up.

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                                            4 Questions | 4 Answers
                                            Displaying questions 1-4
                                            • Universal Switching Relay w/ Internal Transformer

                                              Q:

                                              I have 4 zone valves running off one circulator I was told I can run all of them with this relay box
                                              Asked on 1/5/2012 by Anonymous

                                              1 answer

                                              • CUSTOMER CARE

                                                A:

                                                We'd recommend a Taco ZVC404 or ZVC404-EXP (the -EXP version is "expandable" and can be combined with other -EXP controls).

                                                Answered on 1/13/2012 by PexSupply Staff from NY
                                            • Universal Switching Relay w/ Internal Transformer

                                              Q:

                                              I have 4 zones. Do I need 4 switching relays 0r will this control 4 zones?
                                              Asked on 10/17/2011 by Anonymous

                                              1 answer

                                              • CUSTOMER CARE

                                                A:

                                                This can only control one zone, so you would need 4 switching relays. Another option would be to use the Taco SR504 switching relay, which can accommodate four zones.

                                                Answered on 10/18/2011 by PexSupply Staff from NY
                                            • Universal Switching Relay w/ Internal Transformer

                                              Q:

                                              when I connect lines 1 and 2, and jump r-w on a switching relay (honeywell R8845U) should I get
                                              24V on X1-X2, also 120v should come out to connect circulator pump?
                                              Asked on 3/9/2011 by Fred

                                              1 answer

                                              • CUSTOMER CARE

                                                A:

                                                No, the X1 and X2 are dry, low-voltage rated contacts. A circulator may be wired to either COM and NO or to A and B, as both of these are line voltage rated contacts. They are also dry contacts.

                                                Answered on 3/11/2011 by PexSupply Staff from NY
                                            • Universal Switching Relay w/ Internal Transformer

                                              Q:

                                              can you control 2 heating zone valves and 1 circulator pump with this control ?
                                              Asked on 11/4/2010 by hubby from new bedford , ma

                                              1 answer

                                              • CUSTOMER CARE

                                                A:

                                                No, you cannot. For that application, you need the Taco ZVC403-2.

                                                Answered on 11/5/2010 by PexSupply Staff from NY
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