Does tekmar make?

Nick Dearing_2

Hello everyone. I am not super familar with tekmar. Do they make an outdoor reset that will reset only the primary loop, so that the boiler loop itself can be kept at 180F for domestic hot water? Many boilers now come with built in Outdoor Reset but....sometimes you need hotter water for some applications and cooler for others. It doens't seem to make much sense to keep the whole system at 180F all the time...just for making DHW. Thank you.

hydronicsmike

Sure do...

...call 250-545-7749 to discuss your system and options available. Ask for Mike, Ext. 214.

Thanks.

Brad White_9

Others are more familiar with Tekmar by number

but I will offer that for years, any manufacturer of outdoor reset control has always had a feature known as "Domestic Hot Water Priority" which would over-ride any energy-dictated setback when hot water demand required. Tekmar does this to and has such a variety of options to dazzle and delight you.

Still, would it not be nice to decouple the loops so your radiation can enjoy deeper setbacks?

With a conventional boiler your range of setback would be from a high of maybe 180 to a low of maybe 140 to 150. (The objective is not to have lower than 130 degree return water to forestall condensing in your conventional cast iron boiler.)

With the radiation on a separate loop (using injection, a 4-way mixing valve or other devices/means/methods, you can enjoy a full range of radiation loop setbacks from 180 on the coldest days to practically room temperature or high double-digits on the milder days. And your boiler loop stands ready to give you a hot shower on demand.

Cool.

John Ketterman

> water? Many boilers now come with built in

> Outdoor Reset but....sometimes you need hotter

> water for some applications and cooler for

> others. It doens't seem to make much sense to

> keep the whole system at 180F all the time...just

> for making DHW. Thank you.


No, it doesn't make sense, which is why the built-in reset controllers in boilers don't do that. They have two water temperatures, one for central heating and another for when there is a DHW call. Smart people, these boiler manufacturers!

Joe Brix

Not really

There's still only one burner. Condensing/modulating units must still go to high fire when the DHW call comes in. The heating zone usually has a built in mixing valve to keep the heat level in check for that loop.