Outdoor Reset Boiler Control - One Stage Boiler Zoom

Outdoor Reset Boiler Control - One Stage Boiler

SKU:256

Brand: Tekmar

Tekmar
Qty Price
$159.95
/ each
$460.65 / box (3 units x $153.55)
In Stock! Ships in 24-48 Hours
(50 Available)
0

Resources

Specs

Application: Single Boiler
Stages:
?
1 Boiler
Width: 2-7/8"
Height: 4-3/4"
User Interface: LCD
Push Button
Voltage:
?
24v
Depth (Inches): 7/8"
Ambient Conditions: Indoor Only: 32°-104°F < 90% RH non-condensing
Power Supply: 24 V (ac)
Class 2
Relays: 240 V (ac) 5 A-1/6 hp
Temperature Range (F): -60°-266°F
Max Temp (F): 266°F
Min Temp (F): -60°F
Control: Microprocessor PID control
Weight (lbs): 1.3 lbs
Demands: 24 V (ac) 2 VA
Sensors: NTC Thermistor
10 k ohm @ 77°F

Description for Tekmar 256

The Tekmar 256 Boiler Control is a microprocessor-based control designed to regulate the supply water temperature from a single boiler based on the outdoor temperature. To avoid boiler short cycling and large temperature swings, the 256 is able to continuously adjust the boiler differential. The Tekmar 256 includes control functions such as Warm Weather Shut Down (WWSD) and Minimum Boiler setting. The control has a liquid crystal display (LCD) that normally displays the Boiler Supply temperature, but can display other temperatures and settings.

Outdoor Reset Boiler Control - One Stage Boiler

REVIEW SNAPSHOT®

by PowerReviews
TekmarOutdoor Reset Boiler Control - One Stage Boiler
 
4.7

(based on 18 reviews)

Ratings Distribution

  • 5 Stars

     

    (15)

  • 4 Stars

     

    (2)

  • 3 Stars

     

    (0)

  • 2 Stars

     

    (0)

  • 1 Stars

     

    (1)

94%

of respondents would recommend this to a friend.

Pros

No Pros

Cons

No Cons

Best Uses

No Best Uses
    • Primary use:
    • Business (10), Personal (8)

Most Liked Positive Review

 

excellant boiler control

i bouight Tekmar 256 to replace my old Honeywell T475A 1032 outdoor reset controller. I made right choice. New Tekmar 256 woks better than my old honeywell. If you would like to control...Read complete review

i bouight Tekmar 256 to replace my old Honeywell T475A 1032 outdoor reset controller. I made right choice. New Tekmar 256 woks better than my old honeywell. If you would like to control just your boiler On/off based on outdoor reset, All u need Tekmar 256. Very easy to install.

VS

Most Liked Negative Review

 

not very good

Never worked right. Removed it and installed
honeywell outdoor reset that workes great

Never worked right. Removed it and installed
honeywell outdoor reset that workes great

Reviewed by 18 customers

Displaying reviews 1-10

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5.0

Best product to add to an existing system

By Boilers

from Hoffman Estates, IL

Verified Buyer

Comments about Outdoor Reset Boiler Control - One Stage Boiler:

wiring is advanced and may need other components depending on your existing system.

  • Primary use:
  • Business
 
4.0

Super nice outdoor reset

By Ken

from Silver Lake, MN

Verified Buyer

Comments about Outdoor Reset Boiler Control - One Stage Boiler:

Thought i would take a chance and see if it would work with my water to water heat pump/radiant floor set up. Very nice match and easy to tune in and control. I have the boiler thermal couple installed in my buffer tank. The lower temps of 90 to 115 that the Tekmar 256 is controlling also work great for the heat pumps economy temp range as it would with higher boiler temps. The outside thermal couple has an easy to mount enclosure. I have been using this for about 3 weeks now and it has had zero problems. Very nice inexpensive and a huge money saver.

  • Primary use:
  • Personal
 
5.0

Good basic reset control

By TP

from Riverton, NJ

Verified Buyer

Comments about Outdoor Reset Boiler Control - One Stage Boiler:

Purchased and installed 4 units in an apartment complex. Nothing fancy, just your basic boiler reset control. All 4 are installed without issue and are working well.

  • Primary use:
  • Business
 
5.0

Tekmar 256 Best Buy for OutDoor Rest

By Doug

from Northeast

Verified Reviewer

Comments about Outdoor Reset Boiler Control - One Stage Boiler:

Best buy on market for control with outdoor rest. Easy to install.Virtually every feature is adjustable. One button steps throught boiler water temp, target temp and outside temp. Tekmar customer support is excellent. Just make sure boiler sensor is securely anchored.

  • Primary use:
  • Business

(1 of 1 customers found this review helpful)

 
5.0

solves the problem with hot water boiler

By Rocketman

from Toronto, Ontario, Canada

Verified Buyer

Comments about Outdoor Reset Boiler Control - One Stage Boiler:

Hot water heating is great except in the spring and fall when not as much heat is needed. The Tekmar Boiler Control solves this problem by automatically adjusting the water temperature based on outside temperature. This product simplified a situation I have been dealing with for years on an older boiler system.

  • Primary use:
  • Business
 
5.0

EZ

By SJS

from CT

Verified Buyer

Comments about Outdoor Reset Boiler Control - One Stage Boiler:

Set back on a boiler

  • Primary use:
  • Business
 
5.0

WORKS GREAT

By Memonroe

from Stanton,MI

Verified Buyer

Comments about Outdoor Reset Boiler Control - One Stage Boiler:

The Tekmar boiler control works great and was easy to install. I have a Burnham power vent boiler so I needed a separate 24VAC relay to control the circulation pump.

  • Primary use:
  • Personal
 
5.0

Product & Shipping as Promised

By Cost Reducer

from Minnesota

Verified Buyer

Comments about Outdoor Reset Boiler Control - One Stage Boiler:

Best way to lower heating costs in my home and still remain comfortable.

  • Primary use:
  • Personal

(1 of 1 customers found this review helpful)

 
5.0

Best (simple) outdoor reset available.

By Joe S. [@]

from Rahway, NJ

Verified Reviewer

Comments about Outdoor Reset Boiler Control - One Stage Boiler:

This is the most practical outdoor reset available right now. It's incredibly easy to program, saves a bunch of money, and is priced right. It's always our first choice for residential and smaller commercial systems. The installation is simple. Adapts to any type of hydronic boiler. I'm a service technician and installer; I have this control in my own home, and it's the best investment I've made for my boiler so far.

  • Primary use:
  • Business
 
5.0

Tekmar

By williamsfixit

from Ma

Verified Buyer

Comments about Outdoor Reset Boiler Control - One Stage Boiler:

This is worth your money .Istalls easy and fast set up too MUST FOR oil heating systems

  • Primary use:
  • Business

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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.

20 Questions | 34 Answers
Displaying questions 1-10Previous | Next »
  • Outdoor Reset Boiler Control - One Stage Boiler

    Q:

    Is this compatible with an aquastat l8148e 1265?
    Asked on 2/7/2016 by Eric from Glen Ridge, NJ

    1 answer

    • CUSTOMER CARE

      A:

      The 256 boiler relay would wire to the Aquastat TT. There would be no issues connecting to this Aquastat.

      Answered on 3/23/2016 by SupplyHouse Staff from NY
  • Outdoor Reset Boiler Control - One Stage Boiler

    Q:

    Can this control be used with a Grundfos Alpha pump, in a single zone gas-fired 30-year-old American Standard GPH 135 boiler system?
    Asked on 1/4/2014 by Steve from Fort Wayne, IN

    7 answers

    • VERIFIED BUYER

      A:

      It will work with any single stage boiler as long as the the main gas valve is powered by low voltage. .if it high voltage it can be tricky to wire

      Answered on 1/4/2014 by Anonymous
    • VERIFIED BUYER

      A:

      Yes, this control would work fine to reset boiler water temperature with
      outside air

      Answered on 1/4/2014 by Dbon from Pittsburgh
    • VERIFIED BUYER

      A:

      The circulator you have chosen is a variable speed one that will vary water flow depending on pressure changes. The Tekmar control only varies the water temperature being produced by the boiler depending on the outdoor temperature. The circulator and the Tekmar control don't technically interact with each other. In case you don't know..... make sure you put the min temperature on the Tekmar control at 135 or 140. If you let the boiler run below that you will get all kinds of internal flueway condensation. that condensation is acidic and not good for the boiler or burners.

      Answered on 1/4/2014 by Jeff from Virginia
    • VERIFIED BUYER

      A:

      I use the control on an oil fired boiler system so I think it would work on any hot water system. It saves energy but heating the circulating water to a temperature based on the outside temperature. As the outside temperature increases the water is heated to a lower temperature that the maximum 180 thus saving energy. The heating curve can be adjusted but that was beyond my electronic capability.
      Mike

      Answered on 1/5/2014 by Anonymous
    • VERIFIED BUYER

      A:

      Yes, I have both in service at my own house. Make sure to set Tekmar 256 minimum supply temperature properly to avoid flue gas condensation, which leads to cast iron section face rusting and unlined chimney destruction. For ex., no less than 140dF on most applications for cast iron. System supply sensor location is also quite critical. I initially tried surface mount on steel nipple out of boiler with insulation over it, then installed a well in a tee before zone branches. Directions seem that they could be clearer. Use good judgment for other settings.

      Answered on 1/5/2014 by Anonymous
    • VERIFIED BUYER

      A:

      Not sure what you are trying to accomplish with controlling just the pump
      but we used this control in a high school on a 50 year old oil fired tube
      boiler and it works great. We keep our circulator running 24 7 and we use
      the optional timer to have control for day night settings. The controller
      is very flexible and offers a number of curves/settings. This controller
      replaced the original pneumatic control system.
      If using to control a pump you may need a relay.
      I hope that helps.
      Mike

      Answered on 1/6/2014 by Anonymous
    • VERIFIED BUYER

      A:

      If the water temperature is controlled electronically--thermostat--this is exactly the job this reset control is designed to do. The instructions and diagrams are complete and clear. The action is to increase water temperature as outdoor temperature falls. You'll love it!

      Answered on 1/6/2014 by Anonymous
  • Outdoor Reset Boiler Control - One Stage Boiler

    Q:

    Have a Burnham PVG5ni-GS with DHW priority.
    Plan to add an Outdoor Reset.
    Is the Tekmar 256 Outdoor Reset a good compatible choice ?
    Asked on 10/2/2012 by spyros from Huntington NY

    3 answers

    • VERIFIED BUYER

      A:

      Yes, 256 is a good option, you can add a 033 timer to add night setback
      Sent from my iPhone

      Answered on 10/2/2012 by Anonymous
    • VERIFIED BUYER

      A:

      You can definitely use the Tekmar 256 with that boiler. You also need to add a system bypass to protect the boiler against condensation from the lower water temperatures (140F). If you can't install a bypass, you will need to keep the boiler temperature at a minimum of 160F, which will not give the full benefits of the Outdoor Reset Control.
      Joe Starosielec
      ecuacool.com

      Answered on 10/2/2012 by Anonymous
    • VERIFIED BUYER

      A:

      The 256 is a great control for doing outdoor reset. I install a lot of them on existing boilers. Here's where you have to potentially work around a problem. You say you have DHW priority. I'm assuming you have an indirect water heater connected to the boiler. Depending on how you are doing that you may have to do some sort of isolation relay to tell the boiler not to pay attention to the 256 when the domestic hot water calls. That way the boiler will ramp up to full temperature upon a call for the domestic and not turn on to a lower outdoor reset temperature. It's actually fairly simple and if need be I can talk you through that.
      Any questions just let me know.
      Jeff

      Answered on 10/2/2012 by Anonymous
  • Outdoor Reset Boiler Control - One Stage Boiler

    Q:

    Is this capable of post purging circulators for a while after the thermostat ends it's call for heat? If not, is there something that will do that in conjunction with this device?
    Asked on 3/26/2012 by learning

    5 answers

    • VERIFIED BUYER

      A:

      If you use a Tekmar 260 control this would have a 20 second post purge
      feature on the pump. The 265 has no wiring for a pump. You could put a
      delay off timer in the pump circuit for the boiler if you use the 265
      control.

      Answered on 3/26/2012 by Dbon from Pittsburgh
    • VERIFIED BUYER

      A:

      Call the mfg of the circulator that you are using never heard of a post purging circulators before

      Answered on 3/27/2012 by Another PexSupply Customer
    • VERIFIED BUYER

      A:

      I am using the Tekmar #256 for outdoor reset, in conjunction with a Honeywell #8124 Triple Aquastat, with the thermostat as the control of when the circulator, and the boiler, run. Ifis not nothing runs. I still get some short cycling due to imperfect coordination between ermostat and the aquastat (Tekmar). I do not find that the Tekmar control provides circulator run on when the thermostat is not calling for heat. Don't know if it can be set up to do that. Try downloading the manual from the Tekmar website: http://tekmarcontrols.com/hvacsystems/256.html. You may find the answer there. Good luck.

      Answered on 3/27/2012 by Another PexSupply Customer
    • VERIFIED BUYER

      A:

      I'm not sure what is meant by "post purging circulators".  Having said that, this unit only serves to turn on and off the boiler fire based on a temperature curve that relates the boiler temperature with the outside air temperature.  Thermostatic control of individual zone circulators is unaffected.  Hope this helps.
      Howard Levy

      Answered on 3/27/2012 by Another PexSupply Customer
    • VERIFIED BUYER

      A:

      No, the Tekmar 256 will not do this. I installed one about 2 years ago and am very pleased with it's performance. It has worked flawlessly so far. With my installation I did have to install an additional RIB(relay in a box). As far as I know there is no "out of the box" component to accomplish "post purging". It probably does not pay to pursue trying to accomplish this since the 256 adjusts the boiler temp. For example, if the outdoor temp was 45 degrees the 256 may adjust the boiler temp to 140 degrees. To run the circulator for a set amount of time at lower temps may be just a waste of electric. You would be better off installing an automatic vent damper if you don't already have one. This will prevent the heat of the boiler from going up the flue during standby. I would leave this to the pros though as it could be dangerous if installed improperly.

      Answered on 3/27/2012 by Another PexSupply Customer
  • Outdoor Reset Boiler Control - One Stage Boiler

    Q:

    Will the 256 work with a Weil McLain GV4 boiler? Would an extra relay be needed?
    Asked on 12/20/2011 by Anonymous

    2 answers

    • CUSTOMER CARE

      A:

      Yes, the 256 control will work with a Weil-McLain GV-4 boiler. You will not need an extra relay.

      Answered on 12/23/2011 by PexSupply Staff from NY
    • A:

      Yes, this control will work with your boiler.

      Answered on 1/3/2012 by Anonymous from None
  • Outdoor Reset Boiler Control - One Stage Boiler

    Q:

    I have a zoned system with fin tubes in the basement, and cast iron radiators in the rest of the house. Can a single Tekmar 256 be used in this setup, and if so, which "terminal unit" should be selected in the configuration?
    Asked on 10/31/2011 by Eric from Saint Paul, MN

    1 answer

    • CUSTOMER CARE

      A:

      Yes you can use this control for your setup. We would recommend using the Fin–tube Convector (4) setting.

      Answered on 11/2/2011 by PexSupply Staff from NY
  • Outdoor Reset Boiler Control - One Stage Boiler

    Q:

    will this control work with Utica MGB piped as primary/secondary?

    when the boiler is reset by controller, will the vent damper close until it's ready to fire again?
    Asked on 10/19/2011 by rhubarb42 from Baltimore

    1 answer

    • CUSTOMER CARE

      A:

      The Tekmar 256 Boiler Control is a control designed to regulate the supply water temperature from a single boiler based on the outdoor temperature. This control will not operate a vent damper.

      Answered on 11/8/2011 by PexSupply Staff from NY
  • Outdoor Reset Boiler Control - One Stage Boiler

    Q:

    I have gas-fired boiler Smith model GBX with standing pilot. I cannot find boiler demand switch on wiring and connection diagram. What are points of connection Tekmar 260 to my boiler control?

    Thank you
    Asked on 10/1/2011 by Mike from Connecticut

    1 answer

    • CUSTOMER CARE

      A:

      Contacts 5 and 6 on the Tekmar 256 control are for the boiler.

      Answered on 10/4/2011 by PexSupply Staff from NY
  • Outdoor Reset Boiler Control - One Stage Boiler

    Q:

    Will this work with my setup. Single boiler has two zones/circulators (Taco 503 controller) one of the two zones is a 40 gal water tank that is fed from the boiler, does not have its own heat source.
    Asked on 9/16/2011 by JJ from Portland, ME

    1 answer

    • CUSTOMER CARE

      A:

      No, you will need to use the Tekmar 260 control in this situation.

      Answered on 9/21/2011 by PexSupply Staff from NY
  • Outdoor Reset Boiler Control - One Stage Boiler

    Q:

    Will this device work with a ground-source heat-pump that's supplying a radiant system?
    Asked on 5/4/2011 by tlbranth from carnation, wa

    1 answer

    • CUSTOMER CARE

      A:

      As far as we know, it will not. You may want to check with the heat pump manufacturer.

      Answered on 5/5/2011 by PexSupply Staff from NY
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