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Looks good. Partner's I+O manual calls for 1" piping and IF a zone valve is to be used, a CAREFULLY selected one with proper Cv, etc. I would forget the zone valve engineering and put in a three...

Not liking the zone valve operated indirect zone. Precious time is lost waiting for the valve to open and energize the boiler on recovery call.

Piping should be 1" from boiler to indirect. A...

What a waste of fuel, with the boiler set up to maintain temp like it had a coil inside. Your oil company is loving it though.

Does the indirect have a dedicated circulator? Is it prioritized?
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IF you have an indirect, IF the boiler and the indirect are sized properly and IF things are wired properly, the boiler should not be running off a low limit at all. When the indirect calls, it...

Is this piped primary/secondary, and EXACTLY like the I+O manual?

Long post. Here's my thoughts..point 1: If you are looking at a three pass boiler, you are not looking at an expensive-to-run boiler with a hot water coil. I haven't installed a coil boiler in 10...

I'm taking it that the air scoop is on the return. Because I HOPE the rad zone is the first set of T's off the primary loop. They using an internal pump for the primary loop?

The Laars cousin, the...

You will need an oil burner tech's keen and practiced eye to sort this out for you..

Hmm. Gravity systems were out by '55. So it's possible it is a converted steam job.

No matter. Your plan to do home runs w/ manifolds, Fosta, is a great one. Put thermostatic radiator valves on...

What kind of domestic load are we talking?

I'm not familiar with Knights reset curve adjustments, but if you can shift it to accomodate the CI rad emmitters that would be good. Resets work linearly, as far as I know there is no bang on below...

And the oil industry eats it's young. Again. Unbelievable.

You can run some Rohmar 9100 through it. Is it a 100% water system or glycol'd?

Keep in mind that the black boiler water is the good stuff. Dead, de-oxygenated gold.

Your first mistake was to not replace the whole thing. Fooling around with the burner nozzle and pump pressures isn't going to change anything. It SEEMS like it is, but the readings are happenstance....

"good hack work" LOL!

That's some funny stuff!

If it's the supply plenum, bad. If it's the return plenum, only if they had no choice.

Musta been a humdinger for 5 pages to be vaporized :)

I'm pretty much spitting fire at the cavelier, general, and presumptuous
internet statement about the BTU's per sq ft guess. 50-60 BTU's per sq ft???

I just had a HO last week quote me the SAME...

The only homes that I would give a pass to with returns in the baths would be Andie McDowall's and Julianne Moore's. There is no possible way those women can emit any foul odors.

Count on more joints (read potential leak points) with stick copper. I only use it for aesthetics on that rare job where the lineset has to run outside exposed horizontal for many many feet.

Been using my Yellow Jacket bender 10 years now. LOVE it. A lot of times am able to have just two connections, just like the liquid line :)

Do some more research on DV three pass boilers. Then you can get at least Energy Star 86% +/- units. I know Buderus G115 (WS) can be had in DV, not sure if Burnham's MPO can be DV. I've done the...

I have been seeing the utilities use pex type gas piping for burial in the street/branch runs.

I've even done burial with plastic for grills and generator installation.

You realize that electronics make the spark and the gas valve work on modern atomospheric boilers?

I may pick up a nail at any time driving, but it doesn't stop me from purchasing pneumatic tires.

Apparently the inspectors are looking for positive grounding, and buried pipe won't cut it. Plus, they don't know if newer composite material was used, interrupting path.

If there is a dedicated...