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tekmar 256

I was called on a job to wire a boiler using a tekmar 256....a different heating contractor installed boiler and could not wire customer provided control...I know how to wire it but when you have to put in what type of radiation is being used what do I put in if there's a combination of baseboard and radiant heating.....?....there is no boiler protection loop for low return water temp...thanks Paul S
ASM Mechanical Company
Located in Staten Island NY
Servicing all 5 boroughs of NYC.
347-692-4777
ASMMECHANICALCORP@GMAIL.COM
ASMHVACNYC.COM
https://heatinghelp.com/find-a-contractor/detail/asm-mechanical-company

Comments

  • SWEI
    SWEI Member Posts: 7,356
    Tekmar curves

    From http://tekmarcontrols.com/images/_literature/e0003_06.pdf



    There is a minimum target temperature setting for the boiler that sets the bottom of the curve.
  • Zman
    Zman Member Posts: 7,561
    256

    Paul,

    The 256 will control the boiler with outdoor reset. You can set the boiler minimum output.

    It is not designed for two temp systems or boiler protection.

    Carl
    "If you can't explain it simply, you don't understand it well enough"
    Albert Einstein
  • Paul S_3
    Paul S_3 Member Posts: 1,261
    edited November 2013
    256

    I can still use it right?....do they make a control for 2 temp systems? Thanks paul S (in other words what type of control you wouldve used on a application like this)
    ASM Mechanical Company
    Located in Staten Island NY
    Servicing all 5 boroughs of NYC.
    347-692-4777
    ASMMECHANICALCORP@GMAIL.COM
    ASMHVACNYC.COM
    https://heatinghelp.com/find-a-contractor/detail/asm-mechanical-company
  • SWEI
    SWEI Member Posts: 7,356
    edited November 2013
    Two temps

    A 363 will manage two separate reset curves.  They're somewhat pricey.



    I'd probably just add a Taco iSeries-R for the RFH.
  • Paul S_3
    Paul S_3 Member Posts: 1,261
    tekmar 256

    How come this control has a room occupied temp setting and a unnoccupied temp setting if it does not actually sense temp....i believe its a parallel heating curve ...can someone explain that? thanks paul s
    ASM Mechanical Company
    Located in Staten Island NY
    Servicing all 5 boroughs of NYC.
    347-692-4777
    ASMMECHANICALCORP@GMAIL.COM
    ASMHVACNYC.COM
    https://heatinghelp.com/find-a-contractor/detail/asm-mechanical-company
  • SWEI
    SWEI Member Posts: 7,356
    It's a curve shift

    triggered by an external signal.
This discussion has been closed.