Munchkin + Tekmar 270

coreys

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

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.

jerry

Guy_6

Munchkin

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

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

Thanks Jerry.

That's a lead I can use.

jerry scharf_3

more than just the box

CH,

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

jerry