Best Of
Re: Taco needs to create an animation of how the 570 series zone valve works.
Basically it works like this:
Terminal 2 receives 24v from R on the transformer. It is connected to the heat motor and the end switch.
Terminal 1comes from the other side of the heat motor and goes to the thermostat. When the thermostat switch closes, it connects to C on the transformer, and activates the heat motor to open the valve. The heater switch keeps the heat motor from overheating.
Terminal 3 comes from the end switch. When the valve opens, the end switch closes, outputting 24V to terminal 3. This tells the boiler to start. But the connection between the 570 and the boiler control can be problematic.
The danger comes from connecting two transformers together via terminal 3. This can burn the transformers up if they are not connected properly. I always use an isolation relay between the 570 and the boiler control, to prevent this. I've used a single relay to handle the Terminal 3 outputs from several 570s that are fed from the same transformer. Yes, it's an extra item and costs a few bucks, but it can save a lot of aggravation.
Re: Draining residential boiler in spring
Thanks! I never took a class, but I’ve read a lot of books, mostly novels. I have a huge collection of brief descriptions that inspire me. For example:
He had the attention of a hummingbird
A yacht of a nose
As quiet as greased smoke
I have never understood the two of you. She’s a steaknife, and you’re a dessert spoon.
She ended the conversation with the efficiency of a guillotine.
She looked at me the way a woman looks at a pair of shoes that are OK, but not quite right.
Her eyes were clover green and Celtic fierce.
He picked his words as though they were fruit on a bramble bush.
As hot as a Tex-Mex picnic on Mercury
He entered the room looking like a Spanish galleon in full sail.
He left like a creaking rocking chair, squeaking and leaning back-and-forth.
He was charismatically challenged.
As crazy as a soup sandwich
He kept smiling at her with a mouth like a wet keyhole.
Re: Radiators Are In Stock
I'm in what is called a "mixed marriage" I guess.
My wife cringes, and sometimes full-on hollers at me when I call it gravy (which is partly why I do it, of course). Her father is the original Italian playboy, having immigrated from Puglia at 16 years old and still can't speak English very well, wears gold chains under his unbuttoned shirts, and still tries to pick up ladies at his 82 years of age. My mother in law is a beautiful woman from Sicily and is just impossible, which is a whole 'nother story. But they were very much a food-centric, cooking-exquisite-meals-daily household. They are right about the saucy-gravy debate but my mom (pictured) and I will never admit that to them.
This is a nice nostalgic thread we have going here.
JohnNY
Re: Radiators Are In Stock
sauce vs. gravy reminds me…
My youngest son used to refer to salad dressing as "Salad Gravy". Made for some strange looks from servers in restaurants.
Kid thought ranch was a food group!
Have a good weekend everyone!
Re: Radiators Are In Stock
I get these all the time. They're the perfect shape for trapping mom's Sunday tomato sauce. In Italian, they're called "radiatori."
JohnNY
Re: Mitigating extreme water hammer spikes in high-head plumbing loops?
Is it just me, or is the original post spam, AI assisted ad? New account? Super model photo? Trying to get traffic on the international website? Nobody I know who works on pipes can write so elegantly with perfect grammer.... Actually I probably don't know anybody personally, any field, who writes like that.
bjohnhy
Re: Steam piping, change in elevation solution.
@RayWohlfarth (insert eye roll here) Haha. Hope you're well.
That's an interesting question! I'm going to find out what the threshold is on the mega press. I spent over $10,000 on ½" to 4" jaws so after the fact seems like the perfect time to look into it.
JohnNY
Re: Burnham replacement boiler EDR/Pick Up Question
For steam, learn to err on the slightly smaller. But it won't be an err, it will be the correct thing to do.
Re: Recourse after overpaying?
Let's cut to the chase here, folks. Party A agreed with party B to pay party B to perform some work and supply some material. They agreed, if I read the initial post correctly, on a specified sum.
Not to sound like a total kill-joy here, but that is a civil contract, and there is no ethical or moral or legal way to get out of honoring the contract, provided that party B performed the work and supplied the material as written or agreed.
Whether the contract was "fair" to either party, or the contract price was "reasonable", or whatever is totally irrelevant.
Sorry.
