Amtrol Boilermate Recommendation?

See this thread for information on an effective (and radical) alternative to the Boilermate called the Ergomax E23:

Coal boiler buffer tank, any success or failure stories ?

The full output of the tankless coil requires about 200,000 btu's/hr. 4 teeth isn't going to cut it if that tub has a fast-fill fixture. A flow restrictor on the hot water feed to the tub would certainly be a cheap fix...but only if the Mrs. doesn't mind waiting

I vote for more teeth, less timer run time and higher low limit setting.

Dave, now that you have the draft figured out, have you tried reducing the timer duration? I run mine 1.5 minutes every 30, and it works great. If you can reduce the timer like Mike said, you can get away with a higher feed rate without overheating the boiler. For heavy hot water usage, I wouldn't run the low limit below 160 degrees...you might even want to try 170. You said the boiler currently idles around 180 degrees anyway, so the the higher low limit will just fire the stoker sooner during a hot water call.

I wouldn't take an Amtrol indirect if it were free. When I looked into used indirects I found they had the highest failure rate by far due to internal leaks. Many people had warranty claims.

I just recently came across a Buderus that coroided out and had to be scrapped. That surprised me. It failed where the boiler water feed into the unit.

Running the EFM 520 at 4/4 helped this weekend.

Has anyone heard of the Rheem Marathon electric water heater? Home Depot sells this online with lifetime warranty. I watched the video on how it was made, and looks cool.

http://www.rheem.com/product.aspx?id=A0E3C3B2-8670-4A3E-A4DD-B33125C50F64



The local HD has the 41 gallon boilermate too.

How about running the tankless into the cold inlet of the Amtrol, and use it as a indirect? The other option is go with the electric and feed the inlet with the tankless from the efm.

To many choices!

Dave

The low is set to 160 and high 200, but the thermometer typically shows about 10 degree lower than the settings. It runs around 180, and I just took of 30 seconds on the timer so now it runs 1 minute every 30 minutes. The timer i have runs on 30 minute cycle.What a difference draft makes with the DF520...

Yeah 150° boiler water won't make much hot water even with an indirect.

Buderus offers a few different types. I am not sure how proud of them they are $$. I installed mine a few years back. They are unique in that you can "frack" them and get the hard water deposits off the coils internally to keep them more efficent.

An indirect hwh will anticipate the load(recover)quicker running with a triple aquastat over a domestic coil that bounces off the low limit.

How about this one...it is a Triangle Tube Indirect Tank as was mentioned in an earlier post above:

Triangle-Tube-Smart60-Smart-60-Indirect-Water-Heater


Peak/Flow (gal/10 min.) : 100

Stainless steel tank in a tank w/ Lifetime warranty.

I would think that that Triangle would be considered quite a bit on the overkill scene. It would work great for an apartment complex. The specs say that it would take a 270k btu boiler to use the heater to it's potential. 1 1/4" taps from the boiler, WOW! My 80 gallon only uses 3/4"