Thermostatic boiler bypass?

JohnNY

What do you think?

(see pic)

<A HREF="http://www.heatinghelp.com/getListed.cfm?id=290&Step=30">To Learn More About This Professional, Click Here to Visit Their Ad in "Find A Professional"</A>

Unknown

John

Wouldn`t you want the return temp to close the valve?

Dave

Mark Custis

John

I think Dave is correct.

The sensor should be on the return below the cross over.

JohnNY

Yes.

I agree.

Thanks.

To Learn More About This Professional, Click Here to Visit Their Ad in "Find A Professional"

Mark Eatherton

If its a German boiler...

the first location would werk.

But if its an American boiler, what the other guys said...

ME

Unknown

John

Ever tried those ESBE thermostatic valves available through Danfoss?
They may be a better price, and it has no probe.

Dave

Mark Custis

OK Dave & John

You got me. Just bought a big CI for construction heat and snow melt for a MacMansion. The dealer needed the cash flow and it was almost free. The "REAL" heat will be radiant powered by solar then mod/cons.

That valve and set up would make my life easier and save a ton of plumbing.

Thanks

JohnNY

Got a new client with a c.i. boiler suffering from condensation.

You might've guessed I'm trying to create an inexpensive and effective bypass that I can fit on some lower-cost installations and retrofits.
Unfortunately, I just got a price on the valve I wanted to use for this.

and it's gonna cost me $450/per unit.
Vaffanculo for $450.

So, it's back to the proverbial drawing board for me.


To Learn More About This Professional, Click Here to Visit Their Ad in "Find A Professional"

Unknown

Say John,

would something like this fit the bill?

Dave

JohnNY

It would, Dave, thank you.

I had considered using that very unit but was trying to avoid using a three-way valve.
I see I may have to.

To Learn More About This Professional, Click Here to Visit Their Ad in "Find A Professional"

tim smith

John, there was a valve that Weil Mclain used with thermostatic

control in it for boiler protection. I think it was on the HE or VHE boilers. I think it was made by Taco??? cast body. Tim

Henry

We use White-Roger's motorised valves of 1/2 the diameter of the return line, in the bypass line. We control it with a snap disc set for 130F on the return to the boiler. It is cheap, works well and so far 9 years, not one snap disc or motorised valve has been replaced!

JohnNY

What's that?

A little 24volt zone-type valve wired right to the transformer switched by the snap disc aquastat?

To Learn More About This Professional, Click Here to Visit Their Ad in "Find A Professional"