T 50 question

kevin coppinger_4

the process of preparing a T50 install...the load is fin tube baseboard, 29,000 btu. I will use a manifold to feed seperate settings. 1 zone. I am wondering for ideas on piping ( the manual was not helpful)...It seems silly to do primary/secondary.... do I pipe out of the boiler to the manifolds and do a bypass? This is heat only no indirect...kpc

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Constantin

Why not?

Seems reasonable, Mike. T. did that with his Vitodens and standing rads... unless they ever want to install an IDWH as well...

I guess the main thing to ensure is that the flow through the HX in the Munchkin is sufficient, yet compatible with the heat loss/flow requirments/flow capacity of the manifolds and rads. LLH's seem to derive a lot of their value from uncoupling such discrepancies, so I'd take a closer look at what the flows would need to be as a function of season, etc.

[Deleted User]

It can be done...

but it requires some serious caveats. DO NOT TRY THIS AT HOME. THIS FEAT IS BEING PERFORMED BY A PROFESSIONAL.

There, caveats satisfied. Provided that there is minimal interruption to flow through the boiler, this can be done. My home is a prime example. I did a one pipe loop around the exterior perimeter of the home. I then piped my distributor/emmiters off of this main with specially built diverter/venturi tees. All side branches have non electric TRV's at the emmitter, except for the RFH zone, which is the "reference zone".

If I were in your shoes, using baseboard, I'd size the baseboard for a lower temperature of operation, say around 150 degrees F. Then, I'd use the ENERJEE non electric thermostatic bypass valve at each baseboard to make the whole thing work in concert. A V1 control is a must.

The pump would need to be sized to overcome the pressure drop of the loop AND the heat exchanger at design flow rate.

The reason that the factory doesn't show simple systmes like this is because they have no control over what goes into the distribution loop. As long as their primary loop is proplery pumped, they could care less what you do on the secondary side. It will not affect their operation. This is their way off guaranteeing a proper operation of the heat source.

Let me whip you up a drawing using Siggys fantastic new software.

What you have here is an American system (BBR) with a European bent (ModCon boiler, continuous circ with outdoor reset and non electric thermostatic operators)

The ULTIMATE in efficency and comfort.

Enjoy, and Happy Turkey Day.

ME

Uni R

Enerjee -- Tangent

What's the deal with Enerjee? Do they still exist as a company? Does any other company make 3way TRVs? I could use these.

leo g_13

Hey Prof,

should there be spring checks on the non TRV'd side of the baseboard? Or I guess that the TRV's will not completely shut-off flow from the BB as they are a proportional style TRV?

Leo G

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[Deleted User]

Ernie...

As far as I know they're still in business. If not, someone needs to pick up the line and run...

http://www.snipsmag.com/CDA/ArticleInformation/features/BNP__Features__Item/0,3374,68384,00.html

ME

[Deleted User]

No Leo...

No check valve needed. If the vale is partially open, you get parallel flow through the convector and the bypass. If the valve is fully closed, 100 % of the flow goes though bypass, and if valve is 100% open, all flow goes through fin land.

I used these on a problem child job I inherited. Worked like a CHAMP.

I got mine locally from Uncle Bud Norberg at Hydronic Sales Corp 303-781-9559 He had to bring them in, but I'm sure he can drop ship as well.

ME

Uni R

/\/\/\____

They have flatlined. Their phone is disconnected and domain name dropped. I think the valves are Swedish. I'm surprised Danfoss doesn't have something along those lines.

Thanks...

kevin coppinger_4

Thanks Mark....

but will that ensure the proper flow through the boiler with 3/4 baseboard? I guess I don't understand why the supply and return on these are the same size(1.25") as on a 140M or the 80M.... It definately gives you a nice set up...maybe a more than the customer is willing to pay for a small Apt.
If you have roughly 14gal/min on 1.25" and then I use a 1.25x1x1 tee won't that assure flow if I run a 1" bypass and supply 1" to the maniflold?...kpc


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[Deleted User]

The reason they have 1-1/4\" S&R...

is because a guy by the name of Matt Carr told them that if they wanted to sell it as a boiler that they should put 1-1/4" taps on it. So they did. That is one thing about HTP. If you tell them they need to do something, THEY DO.

With the T50, I think if you flowed at least 3 GPM, the 925 control would be happy and things would be great. I have a Gfos 1542 on mine, and it pushes 2 GPM, and it works just great.

ME

kevin coppinger_4

Mark...

again Thank You...that's what I needed to know...I don't want to mess up..I want to do the homework before I start...kpc

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