Amtrol Boilermate Recommendation?

Re: Amtrol Boilermate Recommendation?

PostBy: Pacowy On: Sat Apr 02, 2011 9:11 pm

I'm too lazy to read all of these posts, but has anybody asked what the low temp limit (or whatever you hot water people call it) is set at on his aquastat? It sounds like the timer runs too much at a low setting, but then the boiler cools down under DHW load before it gets asked for more heat. I vote for more teeth, less timer run time and higher low limit setting.

And how about maybe ease up on the fill rate on the tub?

Mike

P.S. I'm cheap, and if I have a DHW coil in a 520 (or bigger), I don't want to spend $ on more hardware.

P.P.S. This is where those extra gallons can come in handy with a Highboy.
Pacowy
 
Stoker Coal Boiler: H.B. Smith 350 Mills boiler/EFM 85R stoker
Coal Size/Type: Buckwheat/anthracite

Re: Amtrol Boilermate Recommendation?

PostBy: lsayre On: Sat Apr 02, 2011 10:56 pm

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 ?
lsayre
 
Stoker Coal Boiler: AHS S130 Coal Gun
Coal Size/Type: Anthracite Pea
Other Heating: Resistance Boiler (if I ever get it fixed)

Re: Amtrol Boilermate Recommendation?

PostBy: Rob R. On: Sun Apr 03, 2011 7:12 am

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.
Rob R.
 
Stoker Coal Boiler: EFM DF520
Coal Size/Type: Rice/buck
Other Heating: Dad's 1953 EFM Highboy

Re: Amtrol Boilermate Recommendation?

PostBy: cokehead On: Sun Apr 03, 2011 7:31 am

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.
cokehead
 
Stove/Furnace Make: Locke, Godin, Tarm in da works
Stove/Furnace Model: Warm Morning 617-A, 3721, 502

Re: Amtrol Boilermate Recommendation?

PostBy: daluds On: Sun Apr 03, 2011 5:10 pm

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

Image

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
daluds
 
Stoker Coal Boiler: EFM DF520
Coal Size/Type: Rice
Stove/Furnace Make: EMF
Stove/Furnace Model: DF-520

Re: Amtrol Boilermate Recommendation?

PostBy: Pacowy On: Sun Apr 03, 2011 5:50 pm

What is the low temp limit set at?

Mike
Pacowy
 
Stoker Coal Boiler: H.B. Smith 350 Mills boiler/EFM 85R stoker
Coal Size/Type: Buckwheat/anthracite

Re: Amtrol Boilermate Recommendation?

PostBy: daluds On: Sun Apr 03, 2011 7:52 pm

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...
daluds
 
Stoker Coal Boiler: EFM DF520
Coal Size/Type: Rice
Stove/Furnace Make: EMF
Stove/Furnace Model: DF-520

Re: Amtrol Boilermate Recommendation?

PostBy: Pacowy On: Sun Apr 03, 2011 8:32 pm

So it sounds like your actual boiler temp is dropping to 150 deg before the stoker gets a call for heat, but the tub fill keeps taking lots of HW while the boiler tries to catch up. You've got a bigger DHW requirement than most of the people who go down to low feed rates in the summer. I'd go along with Rob on kicking the low limit setting up to at least 170 (which is really only 160), and maybe even try 5 teeth of feed. I'll defer to people running 520's but it seems like at 4 teeth you may need to keep an eye on the fire to make sure 1 minute every 30 is enough.

Mike
Pacowy
 
Stoker Coal Boiler: H.B. Smith 350 Mills boiler/EFM 85R stoker
Coal Size/Type: Buckwheat/anthracite

Re: Amtrol Boilermate Recommendation?

PostBy: SMITTY On: Mon Apr 04, 2011 4:37 pm

Yeah 150° boiler water won't make much hot water even with an indirect.
SMITTY
 
Stoker Coal Boiler: Patriot Coal - custom built by Jim Dorsey
Hand Fed Coal Stove: Harman Mark III (not currently in use)
Coal Size/Type: Rice / Blaschak anthracite
Other Heating: Oil fired Burnham boiler

Re: Amtrol Boilermate Recommendation?

PostBy: Pacowy On: Tue Apr 05, 2011 12:56 pm

If you put a 5 gallon pail (or some other container with a known capacity) under the tub spout, how many minutes and seconds does it take to fill it?

Mike
Pacowy
 
Stoker Coal Boiler: H.B. Smith 350 Mills boiler/EFM 85R stoker
Coal Size/Type: Buckwheat/anthracite

Re: Amtrol Boilermate Recommendation?

PostBy: 2001Sierra On: Tue Apr 05, 2011 7:50 pm

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.
2001Sierra
 
Hot Air Coal Stoker Stove: Keystoker 90 Chimney vent
Coal Size/Type: Rice
Other Heating: Buderus Oil Boiler 3115-34
Stove/Furnace Model: Keystoker 90 Chimney Vent

Re: Amtrol Boilermate Recommendation?

PostBy: AA130FIREMAN On: Tue Apr 05, 2011 10:19 pm

An indirect hwh will anticipate the load(recover)quicker running with a triple aquastat over a domestic coil that bounces off the low limit.
AA130FIREMAN
 
Stove/Furnace Make: axeman anderson
Stove/Furnace Model: 130 anthratube

Re: Amtrol Boilermate Recommendation?

PostBy: McGiever On: Fri Apr 08, 2011 4:08 pm

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.
McGiever
 
Stoker Coal Boiler: AXEMAN-ANDERSON 130 "1959"
Hot Air Coal Stoker Stove: HARMAN MAGNUM
Hand Fed Coal Stove: RADIANT HOME AIR BLAST
Baseburners & Antiques: OUR GLENWOOD 111 BASEBURNER "1908"
Coal Size/Type: PEA / ANTHRACITE, NUT-STOVE / ANTHRACITE
Other Heating: Ground Source Heat Pump
Stove/Furnace Make: Hydro Heat /Mega Tek

Re: Amtrol Boilermate Recommendation?

PostBy: Scottscoaled On: Fri Apr 08, 2011 6:24 pm

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" :)
Scottscoaled
 
Stoker Coal Boiler: EFM 520x4, 350, 700. Van Wert 400 x 2, 800, 1200.
Coal Size/Type: Lots of buck

Re: Amtrol Boilermate Recommendation?

PostBy: Pacowy On: Fri Apr 08, 2011 7:42 pm

I'm still not seeing where there's a need to spend $1300+ when the problem may be curable with a couple of setting adjustments. A 520 with a coil can make a lot of DHW even without an indirect.

Mike
Pacowy
 
Stoker Coal Boiler: H.B. Smith 350 Mills boiler/EFM 85R stoker
Coal Size/Type: Buckwheat/anthracite