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Munchkin + Tekmar 270

coreys Member Posts: 27
Project involves redesigning zoning and adding outdoor reset scheme.

This is a Munchkin 140M currently setup with a simple fixed output temperature.

I would like to use a Tekmar Boiler Control 270 to modulate the Munchkin.

Anyone know if this can be done? If so, would it require an upgrade to the 925 controller card?

A lot of Munchkin fans on this board, so sometimes even obscure questions like this one will find an expert...


  • jerry scharf_3
    jerry scharf_3 Member Posts: 419
    upgrade to the munchkin

    I believe you need a rev 4 version of the 925, and an external interface box (often referred to as a tekmar interface) from HTP to be able to get what you want.

  • Guy_6
    Guy_6 Member Posts: 450

    The Munchkin modulates all by itself, by monitoring the delta between supply and return water.
    If you are looking for outdoor re-set capability I would suggest going with the Munchkin Vision 1 program. It was designed for the Munchkin, and is simple to install.
    There is a Tekmar interface available for the Munchkin as well, as Tekmar is certainly in the forefront of that technology.
  • coreys
    coreys Member Posts: 27

    Thanks Guy.
    When I said "modulate", I suppose what I really mean is dynamically setting the output temperature (thus causing the boiler's brain to modulate the burner accordingly).

    I believe that 'interface' bit you speak of is the missing link.
  • coreys
    coreys Member Posts: 27

    Thanks Jerry.

    That's a lead I can use.
  • jerry scharf_3
    jerry scharf_3 Member Posts: 419
    more than just the box


    reread my post. Older versions of the 925 software do not support the tekmar interface.

This discussion has been closed.