How Much Space for EFM 520?

Soft copper for the PRV downtube...fancy.

You can probably open that ball valve on the bypass without any ill effects.

coal stoker wrote:Thanks Don,

Not sure what to do next, it was bitter sweet putting on the final panel.
It has been a lot of fun doing this build, and I am very glad that I chose to do the re-furb myself.
I now have an intimate understanding of how my 520 works, and also now the condition of all the parts involved.
Just have to figure out the next project now
CS

Watch all of StokerDon's projects for ideas..

Your rebuilt jacket looks like new.

Very nice install.

Rob,
I am seeing return temps with around 20 deg differential from the supply, will opening the valve on the bypass improve on this?
What will opening or closing the valve more help me gain?
My understanding was that a bypass loop helps to temper the return to the boiler, just trying to understand.
Thanks,

CS

20 degrees is about perfect. As long as the bypass pipe stays hot when everything is sitting idle, leave it alone.

Check and check.
I will leave it alone, thanks for the info.
CS

Hey guy's

I am looking wire up a L6006 aquastat to be used as an outfire control.
I have the aquastat but it is missing the clamp for the well.
Anyone have one they want to get rid of.

Thanks,
CS

Woke up this morning to the EFM cycling on and off.
upon investigation I found that safety interlocks had worked and kept the auger temp from getting to high.
I moved the probe a little further down the tube and all is good.
I was seeing temps around 135 just outside the jacket.
Anyone else ever get temps that high.
CS

I have never checked the auger temperature on mine, never really found a need to monitor it.

I can hold my hand on it for about 1-2 seconds when it is running hard, but I am not sure what that equates to in degrees.

That sounds about right, being I was able to do the same.
This is the first time it has had to run hard, so this is new territory for me.
And of course as soon as the safety kicked in the boiler started to get behind on the heat calls, but it seems to be catching up.
5 deg this morning. Brrr.
CS

coal stoker wrote:...

........

I also have a problem, I am trying to figure out why my DHW temp is through the roof.
It is like the aquastat on the indirect has no effect,
Then it dawned on me, I think that the circulator I have between the boilers is forcing in past the DHW circulator and pushing the DHW to my high limit setting.
Any thoughts?
I am no expert but this makes sense to me.
Just need some help before someone gets hurt.
I also lowered the 3 speed to the lowest setting, hoping this will help with forcing past the DHW zone circulator.
Thanks in advance,
CS

This happens with my indirect too, unless there is a constant call for heat (like today - in the single digits outside). I replaced the internal flow-check in the Taco circulator, but that's not enough to hold back the stoker's Taco circulator - it just forces the water right past on warmer days, and DHW temp will be whatever boiler temp is. Over 150° sometimes.

I've got used to it. The fact that this ghost-flow stops on a high heat demand actually works out better for me. Our house is poorly insulated, so the baseboard heaters need all the help they can get.

I actually ended up keeping my diverter valve that is in my supply and return loop partially open.
This allowed the circulator to flow in and out of the boiler without pushing past the DHW circulator, it has worked well so far.
CS

Just checking in,
Sitting here thinking that putting in this boiler is better than I had ever imagined, here we are in the middle of May and I still about 2 plus tons left and I am still burning.
I called Lehigh yesterday and found out that there 20 plus ton summer price is $135.
I am lining up a Tri-axle for a 22 ton delivery, that should be 2 years of peace of mind.
Oh by the way did I mention I love love love this boiler it is awesome!!!!!!!!

Great summer to all
CS

Glad to hear you're having a good time with your boiler. These under-fed stoker boilers are awesome!!!

Wow, $135 a ton for rice is a real good price!

Happy hot water!

-Don

Yeah!!!!!!

Indeed Happy Hot Water
CS