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knotgrumpy

knotgrumpy

Joined on January 6, 2013

Last Post on April 13, 2014

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What do you mean?!

@ April 13, 2014 5:16 PM in who is this Mr Pex guy

I AM MR. PECS!

Here you go...

@ March 27, 2014 10:05 PM in Delta T verses Delta P

http://www.heatinghelp.com/forum-thread/146323/Delta-P-Delta-T-Part-5

Mark

Optical Illusion?

@ March 25, 2014 8:05 PM in Piping a Wallhung Modcom for concrete radiant.

Hi Gordan -
I think it is an optical illusion that makes it look like there is a dip in that section. 
Mark

Closet

@ March 25, 2014 11:15 AM in It's good to be a Plumber...NYT

"In the first photo, how many  here know why the electric water heater is in a closet above the floor?"

Because it is in a garage?  Just a guess.

Asbestos Board?

@ March 21, 2014 8:11 PM in are asbestos risks overblown?

Has anyone had any experience with asbestos board?  Came in 4 x 8 sheets like Masonite and was an asbestos/cement mixture.  A little over an 1/8" thick.

My in laws had a fear of house fires and lined their garage with it.  Now it is up to me to have it removed.  I am assuming the same cautions apply.

End of Winter

@ March 18, 2014 3:28 PM in Hot water baseboard heating

Well, the end of winter is here.  How did you eventually make out with your boiler/insulation issues?

Please let us know and post on this new thread:

http://www.heatinghelp.com/forum-thread/149611/Hot-water-baseboard-heating-new-old-thread

Thanks Mark

@ March 15, 2014 10:01 AM in Mod/Con Heat Exchanger Designs

You have a favorite design?

Gennady

@ March 14, 2014 2:36 PM in Mod/Con Heat Exchanger Designs

Is that the Utica/Dunkirk design?

Mod/Con Heat Exchanger Designs

@ March 14, 2014 12:09 PM in Mod/Con Heat Exchanger Designs

As this heating season is easing up a bit (I hope!)  I'm looking to replace my W-M CGi with a mod/con this summer.

Seems there are 3 main heat exchanger designs out there right now:

1) Fire tube ala Triangle Tube and Lochinvar

2) Giannoni ala Burnham Alpine and Lochinvar Cadet

3) Aluminum ala WM Ultra and Buderus

It is a little confusing to consider these choices.

I read a lot of negative things about the Giannoni type exchanger, yet US Boiler continues to sell many boilers with that design and has a new model coming out (K2) that appears to use the Sermata made Giannoni as well.  If it is so horrid a product, why would they subject themselves to service headaches?

I read some good and some bad about aluminum heat exchangers, yet I think WM is on the 3rd generation of its Ultra model.  Aluminum exchangers seem popular in Europe.  I am sure that WM would not continue to advance the Ultra design if it was costing them a lot of money in replacement exchangers.

No one seems to have a beef with the fire tube designs.  Foolish to look at the other designs with this heat exchanger out there?


I'd appreciate any thought on the different styles of heat exchangers and what you guys have encountered in selling and servicing them.  I'm sure there are other homeowners that have similar questions.

Thanks,

Mark

Allied Engineering

@ March 14, 2014 11:01 AM in boiler

Their mod/con looks exactly like a Triangle Tube Challenger.  I think TT imports that one from Europe as well, don't they?

Anyone have experience with the design?

Where did you go?

@ March 10, 2014 4:25 PM in Pumping away ? I must have something messed up! Help

Badger - What is the status?  Get any more pictures of the primary pump/feed/tank area?

Accumulative pressure

@ March 8, 2014 8:36 PM in Pumping away ? I must have something messed up! Help

From one of my favorite Dan Holohan stories:

“Just one of those things,” I said. And we poked around the boiler room some more. And that’s when we spotted the bypass valve. It was up high, between the main supply and return lines. It was just a motorized two-way valve, and it had two operational choices: open or closed. We traced the wiring over to a pressure-operated switch in the main supply line. When the pressure got to a certain point, the two-way valve would open, allowing the water to flow back to the boilers.

“That’s there for when the thermostatic radiator valves are closed,” I said. “The water needs a place to go because the TRVs can’t talk to the pumps. The pump backs up on its performance curve. The pressure switch senses it, and opens the valve. The pumps now have access to the butt end of the boilers.”
 
“And the TRVs are going to be closed more often in the spring and the fall then they are in the dead of winter,” Joe said.
 
“Right. And when that two-way valve opens, eighty feet of pump head, or about thirty-five psi, hits the boilers.”

“Which are already seeing twenty-eight pounds of static head pressure,” Joe said.

“And that makes the total pressure sixty-three psi.”

“On fifty-psi relief valves!” Joe said, and he smiled. Problem solved.

It’s not just one of those things. Not at all. It never is when it’s mechanical. There’s always a reason for things." 
 
http://www.heatinghelp.com/article/364/Boilers/142/Boiler-Failure-after-Two-Years

It's a great story starting with 20 blown boilers sitting in a parking lot.

Are you able

@ March 8, 2014 8:00 PM in Pumping away ? I must have something messed up! Help

To take another picture closer to the primary pump/prv/tank?

Thanks,

Mark

PRV

@ March 8, 2014 12:49 PM in Pumping away ? I must have something messed up! Help

Might just be the picture but it almost looks like you are feeding supply water into the vent of the pressure reducing valve.

Another Pic

@ March 8, 2014 12:46 PM in Pumping away ? I must have something messed up! Help

Can you take another picture of the piping near the inlet to your primary pump and the pressure reducing valve?

Boiler?

@ March 7, 2014 9:41 PM in Recently Completed Radiant Job

What kind of boiler did you use, Bob?

Beautiful

@ March 5, 2014 12:34 PM in Completed boiler & chiller instal

Nice work!  Wow!

Alan

@ March 1, 2014 8:43 PM in Emergency contact info for Viessmann?

Now that he has the numbers you may want to delete them from your post.  The owners may not want Google (or worse)  to grab their cell numbers for eternity.

Respectfully,

Mark

"Modulating" Condensing Boiler

@ March 1, 2014 9:55 AM in Switching from Oil to Gas

"2. Other contractor say that a condensing would be a waste of money for me because I have base board heating so return water temp would be too high so boiler would be operating in non condensing mode at 85% efficiency."

Even if it wouldn't condense, the boiler would modulate and run on a reset curve meeting the demand more precisely then a non-modulating boiler.

It's a little creepy

@ February 28, 2014 2:30 PM in New Gas Conversion

What do you do, wait for the words 'gas' and 'conversion' to appear in the same sentence?
 

Creeps me out.

Timing

@ February 27, 2014 2:28 PM in Apologies!

I was reading the post about how you were going to stop doing seminars in a bit and then, "Poof"!

I thought you'd checked out.

At least the banner ads were still running for your sponsors.

At least

@ February 27, 2014 2:21 PM in Apologies!

At least you didn't activate the nuclear launch codes.

Did you?
Dan? 
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