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Tekmar 279

2washburn
2washburn Member Posts: 1
in Strictly Steam
I'm using a Tekmar 279 on a 21 unit apartment building. I have WWSD set at 60 degrees but the burner usually will not come on until the outside temperature gets down to about 53 degrees. Anybody have a suggestion on how to adjust this? Thanks.

Comments

  • STEVEusaPA
    STEVEusaPA Member Posts: 6,505
    Maybe your outdoor sensor is bad or in the wrong location. There are charts you can compare the sensor to (ohms) along with a good thermometer to see if the sensor is accurate.
    You can also find the resistance for 60 degrees, put the equivalent resistor (or us a decade resistance box) in place of the sensor to make sure your control is working properly.

    There was an error rendering this rich post.

  • hot_rod
    hot_rod Member Posts: 23,398
    edited October 2023
    Or set it to 67
    Has it been off since installed, or has it drifted out of range?
    Bob "hot rod" Rohr
    trainer for Caleffi NA
    Living the hydronic dream
  • JohnNY
    JohnNY Member Posts: 3,292
    Where are you seeing the outdoor temperature? The number on the control's display is what it sees where the sensor is. Either check the temperature around the wall where the sensor is mounted and move it to a more representative area or you'll have to compensate with your settings
    Contact John "JohnNY" Cataneo, NYC Master Plumber, Lic 1784
    Consulting & Troubleshooting
    Heating in NYC or NJ.
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