Check before soldier again

hrlevy

Before I soldier this up for the third time, I thought that would ask if someone could take a look and see if have any major flaws with my design. This system is used to heat my garage. The water hear is off to the right. The supply (cold) is on the bottom, return (hot) is on top. The bottom lines feed the in floor radiant heat. This redesign was to add a mixer valve to the radiant zone. The top lines feed two unit air heaters. It is setup as a two zone system, one for the floor, the other for the unit air heaters.



Thank you

Howard

Zman

Third times a charm

Howard,

It is hard to tell which way the circs are pushing.

Are the 2 left ones pushing left?

If so the right one should be pushing right and connected to the return on the heat source.

It is hard to tell from the picture.

Carl

hrlevy

circs

Carl, you are correct about the direction the circs are pushing.

hrlevy

circs

Carl, you are correct about the direction the circs are pushing.

Zman

Solder away

I think what you have will work fine

Carl

hrlevy

thank you

Carl:

Thank you for your time.

Ironman

Piping looks good...

But is your radiant floor heat in slab or staple up to a wood floor?



If it's in slab, then you don't want to use a thermostatic mixing valve to control the water temp. The high mass of a slab will cause it to continue to give off heat for hours after the thermostat shuts off. If water temp is not varied by outdoor reset to match the load, the zone will over heat. You'll need a "smart valve" or variable speed injection mixing to properly control the water temp. Injection mixing is better but would require some more re-piping. Look at Taco's smart valve.